Scippy

SCIP

Solving Constraint Integer Programs

Detailed Description

methods and files provided by the default constraint handlers of SCIP

A detailed description what a constraint handler does and how to add a constraint handler to SCIP can be found here.

Data Structures

struct  SCIP_ConsNonlinear_Auxexpr
 
struct  SCIP_ConsNonlinear_BilinTerm
 

Modules

 Inclusion methods
 methods to include specific constraint handlers into SCIP
 

Files

file  cons_abspower.h
 some API functions of removed constraint handler for absolute power constraints \(\textrm{lhs} \leq \textrm{sign}(x+a) |x+a|^n + c z \leq \textrm{rhs}\)
 
file  cons_and.c
 Constraint handler for AND-constraints, \(r = x_1 \wedge x_2 \wedge \dots \wedge x_n\).
 
file  cons_and.h
 Constraint handler for AND constraints, \(r = x_1 \wedge x_2 \wedge \dots \wedge x_n\).
 
file  cons_benders.h
 constraint handler for Benders' decomposition
 
file  cons_benderslp.h
 constraint handler for benderslp decomposition
 
file  cons_bounddisjunction.h
 constraint handler for bound disjunction constraints \((x_1 \{\leq,\geq\} b_1) \vee \ldots \vee (x_n \{\leq,\geq\} b_n)\)
 
file  cons_cardinality.h
 constraint handler for cardinality constraints
 
file  cons_conjunction.h
 constraint handler for conjunction constraints
 
file  cons_countsols.h
 Constraint handler for counting feasible solutions.
 
file  cons_cumulative.h
 constraint handler for cumulative constraints
 
file  cons_disjunction.h
 constraint handler for disjunction constraints
 
file  cons_indicator.h
 constraint handler for indicator constraints
 
file  cons_integral.h
 constraint handler for the integrality constraint
 
file  cons_knapsack.h
 Constraint handler for knapsack constraints of the form \(a^T x \le b\), x binary and \(a \ge 0\).
 
file  cons_linear.h
 Constraint handler for linear constraints in their most general form, \(lhs <= a^T x <= rhs\).
 
file  cons_linking.h
 constraint handler for linking binary variables to a linking (continuous or integer) variable
 
file  cons_logicor.h
 Constraint handler for logicor constraints \(1^T x \ge 1\) (equivalent to set covering, but algorithms are suited for depth first search).
 
file  cons_nonlinear.h
 constraint handler for nonlinear constraints specified by algebraic expressions
 
file  cons_or.h
 Constraint handler for "or" constraints, \(r = x_1 \vee x_2 \vee \dots \vee x_n\).
 
file  cons_orbisack.h
 constraint handler for orbisack constraints
 
file  cons_orbitope.h
 constraint handler for (partitioning/packing/full) orbitope constraints w.r.t. the full symmetric group
 
file  cons_pseudoboolean.h
 constraint handler for pseudoboolean constraints
 
file  cons_quadratic.h
 some API functions of removed constraint handler for quadratic constraints \(\textrm{lhs} \leq \sum_{i,j} a_{i,j} x_ix_j + \sum_i b_i x_i \leq \textrm{rhs}\)
 
file  cons_setppc.h
 Constraint handler for the set partitioning / packing / covering constraints \(1^T x\ \{=, \le, \ge\}\ 1\).
 
file  cons_soc.h
 some API functions of removed constraint handler for second order cone constraints \(\sqrt{\gamma + \sum_{i=1}^{n} (\alpha_i\, (x_i + \beta_i))^2} \leq \alpha_{n+1}\, (x_{n+1}+\beta_{n+1})\)
 
file  cons_sos1.h
 constraint handler for SOS type 1 constraints
 
file  cons_sos2.h
 constraint handler for SOS type 2 constraints
 
file  cons_superindicator.h
 constraint handler for indicator constraints over arbitrary constraint types
 
file  cons_symresack.h
 constraint handler for symresack constraints
 
file  cons_varbound.h
 Constraint handler for variable bound constraints \(lhs \leq x + c y \leq rhs\).
 
file  cons_xor.h
 Constraint handler for XOR constraints, \(rhs = x_1 \oplus x_2 \oplus \dots \oplus x_n\).
 
file  cons_rpa.h
 constraint handler for ringpacking
 
file  cons_optcumulative.c
 constraint handler for cumulative constraints with optional activities
 

Abspower Constraints (deprecated)

SCIP_RETCODE SCIPcreateConsAbspower (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *x, SCIP_VAR *z, SCIP_Real exponent, SCIP_Real xoffset, SCIP_Real zcoef, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicAbspower (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *x, SCIP_VAR *z, SCIP_Real exponent, SCIP_Real xoffset, SCIP_Real zcoef, SCIP_Real lhs, SCIP_Real rhs)
 
SCIP_RETCODE SCIPgetNlRowAbspower (SCIP *scip, SCIP_CONS *cons, SCIP_NLROW **nlrow)
 

AND Constraints

This constraint handler deals with AND-constraints. These are constraint of the form:

\[ r = x_1 \wedge x_2 \wedge \dots \wedge x_n \]

where \(x_i\) is a binary variable for all \(i\). Hence, \(r\) is also of binary type. The variable \(r\) is called resultant and the \(x\)'s operators.

SCIP_RETCODE SCIPcreateConsAnd (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *resvar, int nvars, SCIP_VAR **vars, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicAnd (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *resvar, int nvars, SCIP_VAR **vars)
 
int SCIPgetNVarsAnd (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VAR ** SCIPgetVarsAnd (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VARSCIPgetResultantAnd (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Bool SCIPisAndConsSorted (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RETCODE SCIPsortAndCons (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RETCODE SCIPchgAndConsCheckFlagWhenUpgr (SCIP *scip, SCIP_CONS *cons, SCIP_Bool flag)
 
SCIP_RETCODE SCIPchgAndConsRemovableFlagWhenUpgr (SCIP *scip, SCIP_CONS *cons, SCIP_Bool flag)
 

Benders Constraints

Two constraint handlers are implemented for the generation of Benders' decomposition cuts. When included in a problem, the Benders' decomposition constraint handlers generate cuts during the enforcement of LP and relaxation solutions. Additionally, Benders' decomposition cuts can be generated when checking the feasibility of solutions with respect to the subproblem constraints.

This constraint handler has an enforcement priority that is less than the integer constraint handler. This means that only integer feasible solutions from the LP solver are enforced by this constraint handler. This is the traditional behaviour of the branch-and-check approach to Benders' decomposition. Additionally, the check priority is set low, such that this expensive constraint handler is only called as a final check on primal feasible solutions.

This constraint handler in the standard constraint handler that should be added when using Benders' decomposition. Additionally, there is a flag in SCIPincludeConshdlrBenders that permits the addition of the LP constraint handler, cons_benderslp. The use of both cons_benders and cons_benderslp allows the user to perform a multiphase Benders' decomposition algorithm.

SCIP_RETCODE SCIPconsBendersEnforceSolution (SCIP *scip, SCIP_SOL *sol, SCIP_CONSHDLR *conshdlr, SCIP_RESULT *result, SCIP_BENDERSENFOTYPE type, SCIP_Bool checkint)
 

Bound Disjunction Constraints

This constraint handler handles bound disjunction constraints of the form

\[ (x_1 \{\leq,\geq\} b_1) \vee \ldots \vee (x_n \{\leq,\geq\} b_n) \]

with bounds \(b_i \in Q\), decision variables \(x_i\), which can be of any type, and bound types \(\leq\) or \(\geq\).

SCIP_RETCODE SCIPcreateConsBounddisjunction (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_BOUNDTYPE *boundtypes, SCIP_Real *bounds, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicBounddisjunction (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_BOUNDTYPE *boundtypes, SCIP_Real *bounds)
 
SCIP_RETCODE SCIPcreateConsBounddisjunctionRedundant (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_BOUNDTYPE *boundtypes, SCIP_Real *bounds, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicBounddisjunctionRedundant (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_BOUNDTYPE *boundtypes, SCIP_Real *bounds)
 
int SCIPgetNVarsBounddisjunction (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VAR ** SCIPgetVarsBounddisjunction (SCIP *scip, SCIP_CONS *cons)
 
SCIP_BOUNDTYPESCIPgetBoundtypesBounddisjunction (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RealSCIPgetBoundsBounddisjunction (SCIP *scip, SCIP_CONS *cons)
 

Cardinality Constraints

This constraint handler handles cardinality constraints of the form

\[ |\mbox{supp}(x)| \leq b \]

with integer right-hand side \(b\). Here, \(|\mbox{supp}(x)|\) denotes the number of nonzero entries of the vector \(x\).

Cardinality constraints generalize special ordered set of type one (SOS1) constraints in which \(b = 1\).

SCIP_RETCODE SCIPcreateConsCardinality (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, int cardval, SCIP_VAR **indvars, SCIP_Real *weights, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicCardinality (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, int cardval, SCIP_VAR **indvars, SCIP_Real *weights)
 
SCIP_RETCODE SCIPchgCardvalCardinality (SCIP *scip, SCIP_CONS *cons, int cardval)
 
SCIP_RETCODE SCIPaddVarCardinality (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_VAR *indvar, SCIP_Real weight)
 
SCIP_RETCODE SCIPappendVarCardinality (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_VAR *indvar)
 
int SCIPgetNVarsCardinality (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VAR ** SCIPgetVarsCardinality (SCIP *scip, SCIP_CONS *cons)
 
int SCIPgetCardvalCardinality (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RealSCIPgetWeightsCardinality (SCIP *scip, SCIP_CONS *cons)
 

Conjunction Constraints

A conjunction constraint \( C \) is a constraint of the form

\[ C = C_1 \wedge \dots \wedge C_n \]

where all the \( C_i \) are individual constraints themselves.

SCIP_RETCODE SCIPcreateConsConjunction (SCIP *scip, SCIP_CONS **cons, const char *name, int nconss, SCIP_CONS **conss, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic)
 
SCIP_RETCODE SCIPcreateConsBasicConjunction (SCIP *scip, SCIP_CONS **cons, const char *name, int nconss, SCIP_CONS **conss)
 
SCIP_RETCODE SCIPaddConsElemConjunction (SCIP *scip, SCIP_CONS *cons, SCIP_CONS *addcons)
 

Constraint Handler for counting solutions

If this constraint handler is activated than it counts or collects all feasible solutions. We refer to How to use SCIP to count/enumerate feasible solutions for more details about using SCIP for counting feasible solutions.

 SCIP_DECL_DIALOGEXEC (SCIPdialogExecCountPresolve)
 
 SCIP_DECL_DIALOGEXEC (SCIPdialogExecCount)
 
 SCIP_DECL_DIALOGEXEC (SCIPdialogExecWriteAllsolutions)
 
SCIP_RETCODE SCIPcount (SCIP *scip)
 
SCIP_Longint SCIPgetNCountedSols (SCIP *scip, SCIP_Bool *valid)
 
void SCIPgetNCountedSolsstr (SCIP *scip, char **buffer, int buffersize, int *requiredsize)
 
SCIP_Longint SCIPgetNCountedFeasSubtrees (SCIP *scip)
 
void SCIPgetCountedSparseSols (SCIP *scip, SCIP_VAR ***vars, int *nvars, SCIP_SPARSESOL ***sols, int *nsols)
 
SCIP_RETCODE SCIPsetParamsCountsols (SCIP *scip)
 

Cumulative Constraints

Given:

  • a set of jobs, represented by their integer start time variables \(S_j\), their array of processing times \(p_j\) and of their demands \(d_j\).
  • an integer resource capacity \(C\)

The cumulative constraint ensures that for each point in time \(t\) \(\sum_{j: S_j \leq t < S_j + p_j} d_j \leq C\) holds.

Separation:
  • can be done using binary start time model, see Pritskers, Watters and Wolfe
  • or by just separating relatively weak cuts on the start time variables
Propagation:
  • time tabling, Klein & Scholl (1999)
  • Edge-finding from Petr Vilim, adjusted and simplified for dynamic repropagation (2009)
  • energetic reasoning, see Baptiste, Le Pape, Nuijten (2001)
SCIP_RETCODE SCIPcreateConsCumulative (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, int *durations, int *demands, int capacity, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicCumulative (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, int *durations, int *demands, int capacity)
 
SCIP_RETCODE SCIPsetHminCumulative (SCIP *scip, SCIP_CONS *cons, int hmin)
 
int SCIPgetHminCumulative (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RETCODE SCIPsetHmaxCumulative (SCIP *scip, SCIP_CONS *cons, int hmax)
 
int SCIPgetHmaxCumulative (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VAR ** SCIPgetVarsCumulative (SCIP *scip, SCIP_CONS *cons)
 
int SCIPgetNVarsCumulative (SCIP *scip, SCIP_CONS *cons)
 
int SCIPgetCapacityCumulative (SCIP *scip, SCIP_CONS *cons)
 
int * SCIPgetDurationsCumulative (SCIP *scip, SCIP_CONS *cons)
 
int * SCIPgetDemandsCumulative (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RETCODE SCIPcheckCumulativeCondition (SCIP *scip, SCIP_SOL *sol, int nvars, SCIP_VAR **vars, int *durations, int *demands, int capacity, int hmin, int hmax, SCIP_Bool *violated, SCIP_CONS *cons, SCIP_Bool printreason)
 
SCIP_RETCODE SCIPnormalizeCumulativeCondition (SCIP *scip, int nvars, SCIP_VAR **vars, int *durations, int *demands, int *capacity, int *nchgcoefs, int *nchgsides)
 
SCIP_RETCODE SCIPsplitCumulativeCondition (SCIP *scip, int nvars, SCIP_VAR **vars, int *durations, int *demands, int capacity, int *hmin, int *hmax, int *split)
 
SCIP_RETCODE SCIPpresolveCumulativeCondition (SCIP *scip, int nvars, SCIP_VAR **vars, int *durations, int hmin, int hmax, SCIP_Bool *downlocks, SCIP_Bool *uplocks, SCIP_CONS *cons, SCIP_Bool *delvars, int *nfixedvars, int *nchgsides, SCIP_Bool *cutoff)
 
SCIP_RETCODE SCIPpropCumulativeCondition (SCIP *scip, SCIP_PRESOLTIMING presoltiming, int nvars, SCIP_VAR **vars, int *durations, int *demands, int capacity, int hmin, int hmax, SCIP_CONS *cons, int *nchgbds, SCIP_Bool *initialized, SCIP_Bool *explanation, SCIP_Bool *cutoff)
 
SCIP_RETCODE SCIPrespropCumulativeCondition (SCIP *scip, int nvars, SCIP_VAR **vars, int *durations, int *demands, int capacity, int hmin, int hmax, SCIP_VAR *infervar, int inferinfo, SCIP_BOUNDTYPE boundtype, SCIP_BDCHGIDX *bdchgidx, SCIP_Real relaxedbd, SCIP_Bool *explanation, SCIP_RESULT *result)
 
SCIP_RETCODE SCIPvisualizeConsCumulative (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RETCODE SCIPsetSolveCumulative (SCIP *scip, SCIP_DECL_SOLVECUMULATIVE((*solveCumulative)))
 
SCIP_RETCODE SCIPsolveCumulative (SCIP *scip, int njobs, SCIP_Real *ests, SCIP_Real *lsts, SCIP_Real *objvals, int *durations, int *demands, int capacity, int hmin, int hmax, SCIP_Real timelimit, SCIP_Real memorylimit, SCIP_Longint maxnodes, SCIP_Bool *solved, SCIP_Bool *infeasible, SCIP_Bool *unbounded, SCIP_Bool *error)
 
SCIP_RETCODE SCIPcreateWorstCaseProfile (SCIP *scip, SCIP_PROFILE *profile, int nvars, SCIP_VAR **vars, int *durations, int *demands)
 
int SCIPcomputeHmin (SCIP *scip, SCIP_PROFILE *profile, int capacity)
 
int SCIPcomputeHmax (SCIP *scip, SCIP_PROFILE *profile, int capacity)
 
#define SCIP_DECL_SOLVECUMULATIVE(x)
 

Disjunction Constraints

A disjunction constraint \( C \) is a constraint of the form

\[ C = C_1 \vee \dots \vee C_n \]

where all the \( C_i \) are individual constraints themselves.

SCIP_RETCODE SCIPcreateConsDisjunction (SCIP *scip, SCIP_CONS **cons, const char *name, int nconss, SCIP_CONS **conss, SCIP_CONS *relaxcons, SCIP_Bool initial, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic)
 
SCIP_RETCODE SCIPcreateConsBasicDisjunction (SCIP *scip, SCIP_CONS **cons, const char *name, int nconss, SCIP_CONS **conss, SCIP_CONS *relaxcons)
 
SCIP_RETCODE SCIPaddConsElemDisjunction (SCIP *scip, SCIP_CONS *cons, SCIP_CONS *addcons)
 

Indicator Constraints

An indicator constraint is given by a binary variable \(z\) and an inequality \(ax \leq b\). It states that if \(z = 1\) then \(ax \leq b\) holds.

This constraint is handled by adding a slack variable \(s:\; ax - s \leq b\) with \(s \geq 0\). The constraint is enforced by fixing \(s\) to 0 if \(z = 1\).

Note
The constraint only implements an implication not an equivalence, i.e., it does not ensure that \(z = 1\) if \(ax \leq b\) or equivalently if \(s = 0\) holds.

This constraint is equivalent to a linear constraint \(ax - s \leq b\) and an SOS1 constraint on \(z\) and \(s\) (at most one should be nonzero). In the indicator context we can, however, separate more inequalities.

SCIP_RETCODE SCIPcreateConsIndicator (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *binvar, int nvars, SCIP_VAR **vars, SCIP_Real *vals, SCIP_Real rhs, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicIndicator (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *binvar, int nvars, SCIP_VAR **vars, SCIP_Real *vals, SCIP_Real rhs)
 
SCIP_RETCODE SCIPcreateConsIndicatorGeneric (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *binvar, int nvars, SCIP_VAR **vars, SCIP_Real *vals, SCIP_Real rhs, SCIP_Bool activeone, SCIP_Bool lessthanineq, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsIndicatorLinCons (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *binvar, SCIP_CONS *lincons, SCIP_VAR *slackvar, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsIndicatorGenericLinCons (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *binvar, SCIP_CONS *lincons, SCIP_VAR *slackvar, SCIP_Bool activeone, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicIndicatorLinCons (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *binvar, SCIP_CONS *lincons, SCIP_VAR *slackvar)
 
SCIP_RETCODE SCIPaddVarIndicator (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_Real val)
 
SCIP_CONSSCIPgetLinearConsIndicator (SCIP_CONS *cons)
 
SCIP_RETCODE SCIPsetLinearConsIndicator (SCIP *scip, SCIP_CONS *cons, SCIP_CONS *lincons)
 
SCIP_RETCODE SCIPsetBinaryVarIndicator (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *binvar)
 
SCIP_Bool SCIPgetActiveOnIndicator (SCIP_CONS *cons)
 
SCIP_VARSCIPgetBinaryVarIndicator (SCIP_CONS *cons)
 
SCIP_VARSCIPgetBinaryVarIndicatorGeneric (SCIP_CONS *cons)
 
SCIP_VARSCIPgetSlackVarIndicator (SCIP_CONS *cons)
 
SCIP_RETCODE SCIPsetSlackVarUb (SCIP *scip, SCIP_CONS *cons, SCIP_Real ub)
 
SCIP_Bool SCIPisViolatedIndicator (SCIP *scip, SCIP_CONS *cons, SCIP_SOL *sol)
 
SCIP_RETCODE SCIPmakeIndicatorFeasible (SCIP *scip, SCIP_CONS *cons, SCIP_SOL *sol, SCIP_Bool *changed)
 
SCIP_RETCODE SCIPmakeIndicatorsFeasible (SCIP *scip, SCIP_CONSHDLR *conshdlr, SCIP_SOL *sol, SCIP_Bool *changed)
 
SCIP_RETCODE SCIPaddLinearConsIndicator (SCIP *scip, SCIP_CONSHDLR *conshdlr, SCIP_CONS *lincons)
 
SCIP_RETCODE SCIPaddRowIndicator (SCIP *scip, SCIP_CONSHDLR *conshdlr, SCIP_ROW *row)
 

Knapsack Constraints

This constraint handler handles a special type of linear constraints, namely knapsack constraints. A knapsack constraint has the form

\[ \sum_{i=1}^n a_i x_i \leq b \]

with non-negative integer coefficients \(a_i\), integer right-hand side \(b\), and binary variables \(x_i\).

SCIP_RETCODE SCIPcreateConsKnapsack (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Longint *weights, SCIP_Longint capacity, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicKnapsack (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Longint *weights, SCIP_Longint capacity)
 
SCIP_RETCODE SCIPaddCoefKnapsack (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_Longint weight)
 
SCIP_Longint SCIPgetCapacityKnapsack (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RETCODE SCIPchgCapacityKnapsack (SCIP *scip, SCIP_CONS *cons, SCIP_Longint capacity)
 
int SCIPgetNVarsKnapsack (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VAR ** SCIPgetVarsKnapsack (SCIP *scip, SCIP_CONS *cons)
 
SCIP_LongintSCIPgetWeightsKnapsack (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Real SCIPgetDualsolKnapsack (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Real SCIPgetDualfarkasKnapsack (SCIP *scip, SCIP_CONS *cons)
 
SCIP_ROWSCIPgetRowKnapsack (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RETCODE SCIPsolveKnapsackExactly (SCIP *scip, int nitems, SCIP_Longint *weights, SCIP_Real *profits, SCIP_Longint capacity, int *items, int *solitems, int *nonsolitems, int *nsolitems, int *nnonsolitems, SCIP_Real *solval, SCIP_Bool *success)
 
SCIP_RETCODE SCIPsolveKnapsackApproximately (SCIP *scip, int nitems, SCIP_Longint *weights, SCIP_Real *profits, SCIP_Longint capacity, int *items, int *solitems, int *nonsolitems, int *nsolitems, int *nnonsolitems, SCIP_Real *solval)
 
SCIP_RETCODE SCIPseparateKnapsackCuts (SCIP *scip, SCIP_CONS *cons, SCIP_SEPA *sepa, SCIP_VAR **vars, int nvars, SCIP_Longint *weights, SCIP_Longint capacity, SCIP_SOL *sol, SCIP_Bool usegubs, SCIP_Bool *cutoff, int *ncuts)
 
SCIP_RETCODE SCIPseparateRelaxedKnapsack (SCIP *scip, SCIP_CONS *cons, SCIP_SEPA *sepa, int nknapvars, SCIP_VAR **knapvars, SCIP_Real *knapvals, SCIP_Real valscale, SCIP_Real rhs, SCIP_SOL *sol, SCIP_Bool *cutoff, int *ncuts)
 
SCIP_RETCODE SCIPcleanupConssKnapsack (SCIP *scip, SCIP_Bool onlychecked, SCIP_Bool *infeasible)
 

Linear Constraints

This constraint handler handles linear constraints in their most general form. That is,

\[ lhs \leq \sum_{i=1}^n a_i x_i \leq rhs \]

with \(a_i \in Q, i = 1,\dots,n\), \(lhs\in Q \cup \{-\infty\}\), \(rhs\in Q \cup \{\infty\}\), and decision variables \(x_i, i = 1,\dots,n\) which can be binary, integer, or continuous.

Furthermore, this header offers the upgrade functionality of a general linear constraint into a more specific constraint, such as a knapsack constraint, via SCIP_DECL_LINCONSUPGD() and SCIPincludeLinconsUpgrade()

typedef struct SCIP_LinConsUpgrade SCIP_LINCONSUPGRADE
 
SCIP_RETCODE SCIPincludeLinconsUpgrade (SCIP *scip, SCIP_DECL_LINCONSUPGD((*linconsupgd)), int priority, const char *conshdlrname)
 
SCIP_RETCODE SCIPcreateConsLinear (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Real *vals, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicLinear (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Real *vals, SCIP_Real lhs, SCIP_Real rhs)
 
SCIP_RETCODE SCIPcopyConsLinear (SCIP *scip, SCIP_CONS **cons, SCIP *sourcescip, const char *name, int nvars, SCIP_VAR **sourcevars, SCIP_Real *sourcecoefs, SCIP_Real lhs, SCIP_Real rhs, SCIP_HASHMAP *varmap, SCIP_HASHMAP *consmap, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode, SCIP_Bool global, SCIP_Bool *valid)
 
SCIP_RETCODE SCIPaddCoefLinear (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_Real val)
 
SCIP_RETCODE SCIPchgCoefLinear (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_Real val)
 
SCIP_RETCODE SCIPdelCoefLinear (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var)
 
SCIP_Real SCIPgetLhsLinear (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Real SCIPgetRhsLinear (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RETCODE SCIPchgLhsLinear (SCIP *scip, SCIP_CONS *cons, SCIP_Real lhs)
 
SCIP_RETCODE SCIPchgRhsLinear (SCIP *scip, SCIP_CONS *cons, SCIP_Real rhs)
 
int SCIPgetNVarsLinear (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VAR ** SCIPgetVarsLinear (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RealSCIPgetValsLinear (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Real SCIPgetActivityLinear (SCIP *scip, SCIP_CONS *cons, SCIP_SOL *sol)
 
SCIP_Real SCIPgetFeasibilityLinear (SCIP *scip, SCIP_CONS *cons, SCIP_SOL *sol)
 
SCIP_Real SCIPgetDualsolLinear (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Real SCIPgetDualfarkasLinear (SCIP *scip, SCIP_CONS *cons)
 
SCIP_ROWSCIPgetRowLinear (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RETCODE SCIPupgradeConsLinear (SCIP *scip, SCIP_CONS *cons, SCIP_CONS **upgdcons)
 
SCIP_RETCODE SCIPclassifyConstraintTypesLinear (SCIP *scip, SCIP_LINCONSSTATS *linconsstats)
 
SCIP_RETCODE SCIPcleanupConssLinear (SCIP *scip, SCIP_Bool onlychecked, SCIP_Bool *infeasible)
 
#define SCIP_DECL_LINCONSUPGD(x)
 

Linking Constraints

The constraints handler stores linking constraints between a linking variable (continuous or integer) and an array of binary variables. Such a linking constraint has the form:

\[ y = \sum_{i=1}^n {c_i * x_i} \]

with linking variable (continuous or integer) \( y \), binary variables \( x_1, \dots, x_n \) and offset \(b \in Q\), and with the additional side condition that exactly one binary variable has to be one (set partitioning condition).

This constraint can be created only with the linking variable, if it is an integer variable. In this case the binary variables are only created on demand. That is, whenever someone asks for the binary variables. Therefore, such constraints can be used to get a "binary representation" of the domain of the linking variable which will be dynamically created.

SCIP_RETCODE SCIPcreateConsLinking (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *linkvar, SCIP_VAR **binvars, SCIP_Real *vals, int nbinvars, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicLinking (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *linkvar, SCIP_VAR **binvars, SCIP_Real *vals, int nbinvars)
 
SCIP_Bool SCIPexistsConsLinking (SCIP *scip, SCIP_VAR *linkvar)
 
SCIP_CONSSCIPgetConsLinking (SCIP *scip, SCIP_VAR *linkvar)
 
SCIP_VARSCIPgetLinkvarLinking (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RETCODE SCIPgetBinvarsLinking (SCIP *scip, SCIP_CONS *cons, SCIP_VAR ***binvars, int *nbinvars)
 
int SCIPgetNBinvarsLinking (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RealSCIPgetValsLinking (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RETCODE SCIPgetBinvarsDataLinking (SCIP_CONS *cons, SCIP_VAR ***binvars, SCIP_Real **vals, int *nbinvars)
 

Logicor Constraints

This constraint handler handles a special type of linear constraints, namely logic or constraints. These are equivalent to set covering constraints, but are handled by special algorithms which are better suited for depth first search. For a set of binary variables \(x_i, i=1,\dots,n\), a logic or constraint has the form

\[ \sum_{i=1}^n x_i \ge 1. \]

SCIP_RETCODE SCIPcreateConsLogicor (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicLogicor (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars)
 
SCIP_RETCODE SCIPaddCoefLogicor (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var)
 
int SCIPgetNVarsLogicor (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VAR ** SCIPgetVarsLogicor (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Real SCIPgetDualsolLogicor (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Real SCIPgetDualfarkasLogicor (SCIP *scip, SCIP_CONS *cons)
 
SCIP_ROWSCIPgetRowLogicor (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RETCODE SCIPcleanupConssLogicor (SCIP *scip, SCIP_Bool onlychecked, int *naddconss, int *ndelconss, int *nchgcoefs)
 

Nonlinear Constraints

typedef struct SCIP_ConsNonlinear_Auxexpr SCIP_CONSNONLINEAR_AUXEXPR
 
typedef struct SCIP_ConsNonlinear_BilinTerm SCIP_CONSNONLINEAR_BILINTERM
 
SCIP_RETCODE SCIPincludeConsUpgradeNonlinear (SCIP *scip, SCIP_DECL_NONLINCONSUPGD((*nlconsupgd)), int priority, SCIP_Bool active, const char *conshdlrname)
 
SCIP_RETCODE SCIPcreateConsNonlinear (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_EXPR *expr, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable)
 
SCIP_RETCODE SCIPcreateConsBasicNonlinear (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_EXPR *expr, SCIP_Real lhs, SCIP_Real rhs)
 
SCIP_RETCODE SCIPcreateConsQuadraticNonlinear (SCIP *scip, SCIP_CONS **cons, const char *name, int nlinvars, SCIP_VAR **linvars, SCIP_Real *lincoefs, int nquadterms, SCIP_VAR **quadvars1, SCIP_VAR **quadvars2, SCIP_Real *quadcoefs, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable)
 
SCIP_RETCODE SCIPcreateConsBasicQuadraticNonlinear (SCIP *scip, SCIP_CONS **cons, const char *name, int nlinvars, SCIP_VAR **linvars, SCIP_Real *lincoefs, int nquadterms, SCIP_VAR **quadvars1, SCIP_VAR **quadvars2, SCIP_Real *quadcoefs, SCIP_Real lhs, SCIP_Real rhs)
 
SCIP_RETCODE SCIPcreateConsBasicSOCNonlinear (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Real *coefs, SCIP_Real *offsets, SCIP_Real constant, SCIP_VAR *rhsvar, SCIP_Real rhscoeff, SCIP_Real rhsoffset)
 
SCIP_RETCODE SCIPcreateConsBasicSignpowerNonlinear (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *x, SCIP_VAR *z, SCIP_Real exponent, SCIP_Real xoffset, SCIP_Real zcoef, SCIP_Real lhs, SCIP_Real rhs)
 
SCIP_Longint SCIPgetCurBoundsTagNonlinear (SCIP_CONSHDLR *conshdlr)
 
SCIP_Longint SCIPgetLastBoundRelaxTagNonlinear (SCIP_CONSHDLR *conshdlr)
 
void SCIPincrementCurBoundsTagNonlinear (SCIP_CONSHDLR *conshdlr, SCIP_Bool boundrelax)
 
SCIP_HASHMAPSCIPgetVarExprHashmapNonlinear (SCIP_CONSHDLR *conshdlr)
 
SCIP_RETCODE SCIPprocessRowprepNonlinear (SCIP *scip, SCIP_NLHDLR *nlhdlr, SCIP_CONS *cons, SCIP_EXPR *expr, SCIP_ROWPREP *rowprep, SCIP_Bool overestimate, SCIP_VAR *auxvar, SCIP_Real auxvalue, SCIP_Bool allowweakcuts, SCIP_Bool branchscoresuccess, SCIP_Bool inenforcement, SCIP_SOL *sol, SCIP_RESULT *result)
 
SCIP_Bool SCIPassumeConvexNonlinear (SCIP_CONSHDLR *conshdlr)
 
SCIP_RETCODE SCIPcollectBilinTermsNonlinear (SCIP *scip, SCIP_CONSHDLR *conshdlr, SCIP_CONS **conss, int nconss)
 
int SCIPgetNBilinTermsNonlinear (SCIP_CONSHDLR *conshdlr)
 
SCIP_CONSNONLINEAR_BILINTERMSCIPgetBilinTermsNonlinear (SCIP_CONSHDLR *conshdlr)
 
int SCIPgetBilinTermIdxNonlinear (SCIP_CONSHDLR *conshdlr, SCIP_VAR *x, SCIP_VAR *y)
 
SCIP_CONSNONLINEAR_BILINTERMSCIPgetBilinTermNonlinear (SCIP_CONSHDLR *conshdlr, SCIP_VAR *x, SCIP_VAR *y)
 
SCIP_Real SCIPevalBilinAuxExprNonlinear (SCIP *scip, SCIP_VAR *x, SCIP_VAR *y, SCIP_CONSNONLINEAR_AUXEXPR *auxexpr, SCIP_SOL *sol)
 
SCIP_RETCODE SCIPinsertBilinearTermExistingNonlinear (SCIP *scip, SCIP_CONSHDLR *conshdlr, SCIP_VAR *x, SCIP_VAR *y, SCIP_VAR *auxvar, int nlockspos, int nlocksneg)
 
SCIP_RETCODE SCIPinsertBilinearTermImplicitNonlinear (SCIP *scip, SCIP_CONSHDLR *conshdlr, SCIP_VAR *x, SCIP_VAR *y, SCIP_VAR *auxvar, SCIP_Real coefx, SCIP_Real coefy, SCIP_Real coefaux, SCIP_Real cst, SCIP_Bool overestimate)
 
SCIP_RETCODE SCIPcomputeFacetVertexPolyhedralNonlinear (SCIP *scip, SCIP_CONSHDLR *conshdlr, SCIP_Bool overestimate, SCIP_DECL_VERTEXPOLYFUN((*function)), void *fundata, SCIP_Real *xstar, SCIP_Real *box, int nallvars, SCIP_Real targetvalue, SCIP_Bool *success, SCIP_Real *facetcoefs, SCIP_Real *facetconstant)
 
SCIP_EXPRSCIPgetExprNonlinear (SCIP_CONS *cons)
 
SCIP_Real SCIPgetLhsNonlinear (SCIP_CONS *cons)
 
SCIP_Real SCIPgetRhsNonlinear (SCIP_CONS *cons)
 
SCIP_RETCODE SCIPgetNlRowNonlinear (SCIP *scip, SCIP_CONS *cons, SCIP_NLROW **nlrow)
 
SCIP_EXPRCURV SCIPgetCurvatureNonlinear (SCIP_CONS *cons)
 
SCIP_RETCODE SCIPcheckQuadraticNonlinear (SCIP *scip, SCIP_CONS *cons, SCIP_Bool *isquadratic)
 
SCIP_RETCODE SCIPchgLhsNonlinear (SCIP *scip, SCIP_CONS *cons, SCIP_Real lhs)
 
SCIP_RETCODE SCIPchgRhsNonlinear (SCIP *scip, SCIP_CONS *cons, SCIP_Real rhs)
 
SCIP_RETCODE SCIPchgExprNonlinear (SCIP *scip, SCIP_CONS *cons, SCIP_EXPR *expr)
 
SCIP_RETCODE SCIPaddLinearVarNonlinear (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_Real coef)
 
SCIP_RETCODE SCIPaddExprNonlinear (SCIP *scip, SCIP_CONS *cons, SCIP_EXPR *expr, SCIP_Real coef)
 
SCIP_RETCODE SCIPgetAbsViolationNonlinear (SCIP *scip, SCIP_CONS *cons, SCIP_SOL *sol, SCIP_Real *viol)
 
SCIP_RETCODE SCIPgetRelViolationNonlinear (SCIP *scip, SCIP_CONS *cons, SCIP_SOL *sol, SCIP_Real *viol)
 
void SCIPgetLinvarMayDecreaseNonlinear (SCIP *scip, SCIP_CONS *cons, SCIP_VAR **var, SCIP_Real *coef)
 
void SCIPgetLinvarMayIncreaseNonlinear (SCIP *scip, SCIP_CONS *cons, SCIP_VAR **var, SCIP_Real *coef)
 
int SCIPgetExprNLocksPosNonlinear (SCIP_EXPR *expr)
 
int SCIPgetExprNLocksNegNonlinear (SCIP_EXPR *expr)
 
SCIP_VARSCIPgetExprAuxVarNonlinear (SCIP_EXPR *expr)
 
int SCIPgetExprNEnfosNonlinear (SCIP_EXPR *expr)
 
void SCIPgetExprEnfoDataNonlinear (SCIP_EXPR *expr, int idx, SCIP_NLHDLR **nlhdlr, SCIP_NLHDLREXPRDATA **nlhdlrexprdata, SCIP_NLHDLR_METHOD *nlhdlrparticipation, SCIP_Bool *sepabelowusesactivity, SCIP_Bool *sepaaboveusesactivity, SCIP_Real *auxvalue)
 
void SCIPsetExprEnfoAuxValueNonlinear (SCIP_EXPR *expr, int idx, SCIP_Real auxvalue)
 
unsigned int SCIPgetExprNPropUsesActivityNonlinear (SCIP_EXPR *expr)
 
unsigned int SCIPgetExprNSepaUsesActivityNonlinear (SCIP_EXPR *expr)
 
unsigned int SCIPgetExprNAuxvarUsesNonlinear (SCIP_EXPR *expr)
 
SCIP_RETCODE SCIPregisterExprUsageNonlinear (SCIP *scip, SCIP_EXPR *expr, SCIP_Bool useauxvar, SCIP_Bool useactivityforprop, SCIP_Bool useactivityforsepabelow, SCIP_Bool useactivityforsepaabove)
 
SCIP_RETCODE SCIPgetExprAbsOrigViolationNonlinear (SCIP *scip, SCIP_EXPR *expr, SCIP_SOL *sol, SCIP_Longint soltag, SCIP_Real *viol, SCIP_Bool *violunder, SCIP_Bool *violover)
 
SCIP_RETCODE SCIPgetExprAbsAuxViolationNonlinear (SCIP *scip, SCIP_EXPR *expr, SCIP_Real auxvalue, SCIP_SOL *sol, SCIP_Real *viol, SCIP_Bool *violunder, SCIP_Bool *violover)
 
SCIP_RETCODE SCIPgetExprRelAuxViolationNonlinear (SCIP *scip, SCIP_EXPR *expr, SCIP_Real auxvalue, SCIP_SOL *sol, SCIP_Real *viol, SCIP_Bool *violunder, SCIP_Bool *violover)
 
SCIP_INTERVAL SCIPgetExprBoundsNonlinear (SCIP *scip, SCIP_EXPR *expr)
 
SCIP_RETCODE SCIPtightenExprIntervalNonlinear (SCIP *scip, SCIP_EXPR *expr, SCIP_INTERVAL newbounds, SCIP_Bool *cutoff, int *ntightenings)
 
SCIP_RETCODE SCIPmarkExprPropagateNonlinear (SCIP *scip, SCIP_EXPR *expr)
 
void SCIPaddExprViolScoreNonlinear (SCIP *scip, SCIP_EXPR *expr, SCIP_Real violscore)
 
SCIP_RETCODE SCIPaddExprsViolScoreNonlinear (SCIP *scip, SCIP_EXPR **exprs, int nexprs, SCIP_Real violscore, SCIP_SOL *sol, SCIP_Bool *success)
 
SCIP_Real SCIPgetExprViolScoreNonlinear (SCIP_EXPR *expr)
 
SCIP_Real SCIPgetExprPartialDiffNonlinear (SCIP *scip, SCIP_EXPR *expr, SCIP_VAR *var)
 
SCIP_Real SCIPgetExprPartialDiffGradientDirNonlinear (SCIP *scip, SCIP_EXPR *expr, SCIP_VAR *var)
 
SCIP_Real SCIPevalExprQuadraticAuxNonlinear (SCIP *scip, SCIP_EXPR *expr, SCIP_SOL *sol)
 
#define SCIP_DECL_VERTEXPOLYFUN(f)   SCIP_Real f (SCIP_Real* args, int nargs, void* funcdata)
 
#define SCIP_MAXVERTEXPOLYDIM   14
 
#define SCIP_DECL_NONLINCONSUPGD(x)
 

OR Constraints

This constraint handler deals with OR constraint. These are constraint of the form:

\[ r = x_1 \vee x_2 \vee \dots \vee x_n \]

where \(x_i\) is a binary variable for all \(i\). Hence, \(r\) is also of binary type. The variable \(r\) is called resultant and the \(x\)'s operators.

SCIP_RETCODE SCIPcreateConsOr (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *resvar, int nvars, SCIP_VAR **vars, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicOr (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *resvar, int nvars, SCIP_VAR **vars)
 
int SCIPgetNVarsOr (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VAR ** SCIPgetVarsOr (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VARSCIPgetResultantOr (SCIP *scip, SCIP_CONS *cons)
 

Orbisack Constraints

This constraint handler can be used to handle symmetries in certain 0/1-programs. The principle structure is that some variables can be ordered in matrix form with two columns, such that permuting both columns does not change the validity and objective function value of a solution. That is, there exists a permutation symmetry of the program that permutes the variables of the first and second column row-wise.

In more mathematical terms the structure has to be as follows: There are 0/1-variables \(x_{ij}\), \(i \in \{1, \dots, n\}\), \(j \in \{1, 2\}\). Permuting columns of \(x\) does not change the validity and objective function value of any feasible solution.

SCIP_RETCODE SCIPcheckSolutionOrbisack (SCIP *scip, SCIP_SOL *sol, SCIP_VAR **vars1, SCIP_VAR **vars2, int nrows, SCIP_Bool printreason, SCIP_Bool *feasible)
 
SCIP_RETCODE SCIPcreateConsOrbisack (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *const *vars1, SCIP_VAR *const *vars2, int nrows, SCIP_Bool ispporbisack, SCIP_Bool isparttype, SCIP_Bool ismodelcons, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicOrbisack (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR **vars1, SCIP_VAR **vars2, int nrows, SCIP_Bool ispporbisack, SCIP_Bool isparttype, SCIP_Bool ismodelcons)
 

Orbitope Constraints

This constraint handler can be used to handle symmetries in certain 0/1-programs. The principle structure is that some variables can be ordered in matrix form, such that permuting columns does not change the validity and objective function value of a solution. That is, the symmetry group of the program contains the full symmetric group obtained by permuting the columns of this matrix. These symmetries can be handled by so-called full orbitopes.

Moreover, if the variables in each row are contained in set packing or partitioning constraint, these symmetries can be handled by specialized packing or partitioning orbitopes.

In more mathematical terms the structure has to be as follows: There are 0/1-variables \(x_{ij}\), \(i \in \{1, \dots, p\}\), \(j \in \{1, \dots, q\}\). The variables may be coupled through set packing or partitioning constraints:

\[ \sum_{j = 1}^q x_{ij} \leq 1 \quad \mbox{or} \quad \sum_{j = 1}^q x_{ij} = 1 \quad \mbox{for all }i = 1, \ldots, p. \]

Permuting columns of \(x\) does not change the validity and objective function value of any feasible solution.

We distinguish whether an orbitope is a model constraint or not. If it is a model constraint, then its information are copied to subSCIPs. Otherwise, the constraint was added just for the purpose of symmetry handling and we do not copy its information to subSCIPs.

SCIP_RETCODE SCIPcreateConsOrbitope (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR ***vars, SCIP_ORBITOPETYPE orbitopetype, int nspcons, int nblocks, SCIP_Bool usedynamicprop, SCIP_Bool mayinteract, SCIP_Bool resolveprop, SCIP_Bool ismodelcons, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicOrbitope (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR ***vars, SCIP_ORBITOPETYPE orbitopetype, int nspcons, int nblocks, SCIP_Bool usedynamicprop, SCIP_Bool resolveprop, SCIP_Bool ismodelcons, SCIP_Bool mayinteract)
 

Pseudoboolean Constraints

The constraint handler deals with pseudo boolean constraints. These are constraints of the form

\[ \mbox{lhs} \leq \sum_{k=0}^m c_k \cdot x_k + \sum_{i=0}^n c_i \cdot \prod_{j \in I_i} x_j \leq \mbox{rhs} \]

where all \(x\) are binary.

enum  SCIP_LinearConsType {
  SCIP_LINEARCONSTYPE_INVALIDCONS = -1,
  SCIP_LINEARCONSTYPE_LINEAR = 0,
  SCIP_LINEARCONSTYPE_LOGICOR = 1,
  SCIP_LINEARCONSTYPE_KNAPSACK = 2,
  SCIP_LINEARCONSTYPE_SETPPC = 3
}
 
typedef enum SCIP_LinearConsType SCIP_LINEARCONSTYPE
 
SCIP_RETCODE SCIPcreateConsPseudobooleanWithConss (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_CONS *lincons, SCIP_LINEARCONSTYPE linconstype, SCIP_CONS **andconss, SCIP_Real *andcoefs, int nandconss, SCIP_VAR *indvar, SCIP_Real weight, SCIP_Bool issoftcons, SCIP_VAR *intvar, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsPseudoboolean (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR **linvars, int nlinvars, SCIP_Real *linvals, SCIP_VAR ***terms, int nterms, int *ntermvars, SCIP_Real *termvals, SCIP_VAR *indvar, SCIP_Real weight, SCIP_Bool issoftcons, SCIP_VAR *intvar, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicPseudoboolean (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR **linvars, int nlinvars, SCIP_Real *linvals, SCIP_VAR ***terms, int nterms, int *ntermvars, SCIP_Real *termvals, SCIP_VAR *indvar, SCIP_Real weight, SCIP_Bool issoftcons, SCIP_VAR *intvar, SCIP_Real lhs, SCIP_Real rhs)
 
SCIP_RETCODE SCIPaddCoefPseudoboolean (SCIP *const scip, SCIP_CONS *const cons, SCIP_VAR *const var, SCIP_Real const val)
 
SCIP_RETCODE SCIPaddTermPseudoboolean (SCIP *const scip, SCIP_CONS *const cons, SCIP_VAR **const vars, int const nvars, SCIP_Real const val)
 
SCIP_VARSCIPgetIndVarPseudoboolean (SCIP *const scip, SCIP_CONS *const cons)
 
SCIP_CONSSCIPgetLinearConsPseudoboolean (SCIP *const scip, SCIP_CONS *const cons)
 
SCIP_LINEARCONSTYPE SCIPgetLinearConsTypePseudoboolean (SCIP *const scip, SCIP_CONS *const cons)
 
int SCIPgetNLinVarsWithoutAndPseudoboolean (SCIP *const scip, SCIP_CONS *const cons)
 
SCIP_RETCODE SCIPgetLinDatasWithoutAndPseudoboolean (SCIP *const scip, SCIP_CONS *const cons, SCIP_VAR **const linvars, SCIP_Real *const lincoefs, int *const nlinvars)
 
SCIP_RETCODE SCIPgetAndDatasPseudoboolean (SCIP *const scip, SCIP_CONS *const cons, SCIP_CONS **const andconss, SCIP_Real *const andcoefs, int *const nandconss)
 
int SCIPgetNAndsPseudoboolean (SCIP *const scip, SCIP_CONS *const cons)
 
SCIP_RETCODE SCIPchgLhsPseudoboolean (SCIP *const scip, SCIP_CONS *const cons, SCIP_Real const lhs)
 
SCIP_RETCODE SCIPchgRhsPseudoboolean (SCIP *const scip, SCIP_CONS *const cons, SCIP_Real const rhs)
 
SCIP_Real SCIPgetLhsPseudoboolean (SCIP *const scip, SCIP_CONS *const cons)
 
SCIP_Real SCIPgetRhsPseudoboolean (SCIP *const scip, SCIP_CONS *const cons)
 

Quadratic Constraints (deprecated)

SCIP_RETCODE SCIPcreateConsQuadratic (SCIP *scip, SCIP_CONS **cons, const char *name, int nlinvars, SCIP_VAR **linvars, SCIP_Real *lincoefs, int nquadterms, SCIP_VAR **quadvars1, SCIP_VAR **quadvars2, SCIP_Real *quadcoeffs, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable)
 
SCIP_RETCODE SCIPcreateConsBasicQuadratic (SCIP *scip, SCIP_CONS **cons, const char *name, int nlinvars, SCIP_VAR **linvars, SCIP_Real *lincoefs, int nquadterms, SCIP_VAR **quadvars1, SCIP_VAR **quadvars2, SCIP_Real *quadcoefs, SCIP_Real lhs, SCIP_Real rhs)
 
void SCIPaddConstantQuadratic (SCIP *scip, SCIP_CONS *cons, SCIP_Real constant)
 
SCIP_RETCODE SCIPaddLinearVarQuadratic (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_Real coef)
 
SCIP_RETCODE SCIPaddQuadVarQuadratic (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_Real lincoef, SCIP_Real sqrcoef)
 
SCIP_RETCODE SCIPaddQuadVarLinearCoefQuadratic (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_Real coef)
 
SCIP_RETCODE SCIPaddSquareCoefQuadratic (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_Real coef)
 
SCIP_RETCODE SCIPaddBilinTermQuadratic (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var1, SCIP_VAR *var2, SCIP_Real coef)
 
SCIP_RETCODE SCIPgetNlRowQuadratic (SCIP *scip, SCIP_CONS *cons, SCIP_NLROW **nlrow)
 
SCIP_RETCODE SCIPchgLhsQuadratic (SCIP *scip, SCIP_CONS *cons, SCIP_Real lhs)
 
SCIP_RETCODE SCIPchgRhsQuadratic (SCIP *scip, SCIP_CONS *cons, SCIP_Real rhs)
 

Set Packing/Partitioning/Covering Constraints

This constraint handler handles three special classes of linear constraints, namely set partitioning, set packing, and set covering constraints. For a set of binary variables \(x_i, i=1,\dots,n\), a set partitioning constraint has the form

\[ \sum_{i=1}^n x_i = 1, \]

a set packing constraint has the form

\[ \sum_{i=1}^n x_i \le 1, \]

and a set covering constraint has the form

\[ \sum_{i=1}^n x_i \ge 1. \]

enum  SCIP_SetppcType {
  SCIP_SETPPCTYPE_PARTITIONING = 0,
  SCIP_SETPPCTYPE_PACKING = 1,
  SCIP_SETPPCTYPE_COVERING = 2
}
 
typedef enum SCIP_SetppcType SCIP_SETPPCTYPE
 
SCIP_RETCODE SCIPcreateConsSetpart (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicSetpart (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars)
 
SCIP_RETCODE SCIPcreateConsSetpack (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicSetpack (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars)
 
SCIP_RETCODE SCIPcreateConsSetcover (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicSetcover (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars)
 
SCIP_RETCODE SCIPaddCoefSetppc (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var)
 
int SCIPgetNVarsSetppc (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VAR ** SCIPgetVarsSetppc (SCIP *scip, SCIP_CONS *cons)
 
SCIP_SETPPCTYPE SCIPgetTypeSetppc (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Real SCIPgetDualsolSetppc (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Real SCIPgetDualfarkasSetppc (SCIP *scip, SCIP_CONS *cons)
 
SCIP_ROWSCIPgetRowSetppc (SCIP *scip, SCIP_CONS *cons)
 
int SCIPgetNFixedonesSetppc (SCIP *scip, SCIP_CONS *cons)
 
int SCIPgetNFixedzerosSetppc (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RETCODE SCIPcleanupConssSetppc (SCIP *scip, SCIP_Bool onlychecked, SCIP_Bool *infeasible, int *naddconss, int *ndelconss, int *nchgcoefs, int *nfixedvars)
 

SOC Constraints (deprecated)

SCIP_RETCODE SCIPcreateConsSOC (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Real *coefs, SCIP_Real *offsets, SCIP_Real constant, SCIP_VAR *rhsvar, SCIP_Real rhscoeff, SCIP_Real rhsoffset, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable)
 
SCIP_RETCODE SCIPcreateConsBasicSOC (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Real *coefs, SCIP_Real *offsets, SCIP_Real constant, SCIP_VAR *rhsvar, SCIP_Real rhscoeff, SCIP_Real rhsoffset)
 
SCIP_RETCODE SCIPgetNlRowSOC (SCIP *scip, SCIP_CONS *cons, SCIP_NLROW **nlrow)
 

Specially Ordered Set (SOS) Type 1 Constraints

A specially ordered set of type 1 (SOS1) is a sequence of variables such that at most one variable is nonzero. The special case of two variables arises, for instance, from equilibrium or complementary conditions like \(x \cdot y = 0\). Note that it is in principle allowed that a variable appears twice, but it then can be fixed to 0.

SCIP_RETCODE SCIPcreateConsSOS1 (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Real *weights, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicSOS1 (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Real *weights)
 
SCIP_RETCODE SCIPaddVarSOS1 (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_Real weight)
 
SCIP_RETCODE SCIPappendVarSOS1 (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var)
 
int SCIPgetNVarsSOS1 (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VAR ** SCIPgetVarsSOS1 (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RealSCIPgetWeightsSOS1 (SCIP *scip, SCIP_CONS *cons)
 
SCIP_DIGRAPHSCIPgetConflictgraphSOS1 (SCIP_CONSHDLR *conshdlr)
 
int SCIPgetNSOS1Vars (SCIP_CONSHDLR *conshdlr)
 
SCIP_Bool SCIPvarIsSOS1 (SCIP_CONSHDLR *conshdlr, SCIP_VAR *var)
 
int SCIPvarGetNodeSOS1 (SCIP_CONSHDLR *conshdlr, SCIP_VAR *var)
 
SCIP_VARSCIPnodeGetVarSOS1 (SCIP_DIGRAPH *conflictgraph, int node)
 
SCIP_RETCODE SCIPmakeSOS1sFeasible (SCIP *scip, SCIP_CONSHDLR *conshdlr, SCIP_SOL *sol, SCIP_Bool *changed, SCIP_Bool *success)
 

Specially Ordered Set (SOS) Type 2 Constraints

A specially ordered set of type 2 (SOS2) is a sequence of variables such that at most two variables are nonzero and if two variables are nonzero they must be adjacent in the specified sequence. Note that it is in principle allowed that a variable appears twice, but it then can be fixed to 0 if it is at least two apart in the sequence.

SCIP_RETCODE SCIPcreateConsSOS2 (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Real *weights, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicSOS2 (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Real *weights)
 
SCIP_RETCODE SCIPaddVarSOS2 (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_Real weight)
 
SCIP_RETCODE SCIPappendVarSOS2 (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var)
 
int SCIPgetNVarsSOS2 (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VAR ** SCIPgetVarsSOS2 (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RealSCIPgetWeightsSOS2 (SCIP *scip, SCIP_CONS *cons)
 

Superindicator Constraints

Superindicator constraints are constraints of the form

\[ x_i = 1 \Rightarrow C(x) \]

where \( x_i \) is a binary variable and \( C(\dot) \) a constraint. The superindicator constraint is satisfied if and only if x_i is zero or C is satisfied.

SCIP_RETCODE SCIPcreateConsSuperindicator (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *binvar, SCIP_CONS *slackcons, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicSuperindicator (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *binvar, SCIP_CONS *slackcons)
 
SCIP_VARSCIPgetBinaryVarSuperindicator (SCIP_CONS *cons)
 
SCIP_CONSSCIPgetSlackConsSuperindicator (SCIP_CONS *cons)
 
SCIP_RETCODE SCIPtransformMinUC (SCIP *scip, SCIP_Bool *success)
 
 SCIP_DECL_DIALOGEXEC (SCIPdialogExecChangeMinUC)
 

Symresack Constraints

Given a permutation that acts on the order of the variables of a (mixed) 0/1-program such that the permutation is a symmetry of the program, this constraint handler can be used to handle the symmetries corresponding to the permutation. The symmetries are handled by enforcing that a binary solution is lexicographically not smaller than its permutation. In a presolving step, we check whether the permutation acts only on binary points. Otherwise, we eliminate the non-binary variables from the permutation. Furthermore, we delete fixed points from the permutation.

Moreover, the constraint handler checks whether each cycle of the permutation is contained in a set packing or partitioning constraint. In this case, the symresack is strengthened to a ppsymresack and strong symmetry handling inequalities are added during the initialization of the constraint handler.

Precondition
The permutation is encoded by an array perm for which perm[i] = j if and only if the image of i under the permutation is j.
The permutation given to the constraint handler has to be a symmetry of the underlying problem. This is NOT checked by the constraint handler.
SCIP_RETCODE SCIPcreateSymbreakCons (SCIP *scip, SCIP_CONS **cons, const char *name, int *perm, SCIP_VAR **vars, int nvars, SCIP_Bool ismodelcons, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsSymresack (SCIP *scip, SCIP_CONS **cons, const char *name, int *perm, SCIP_VAR **vars, int nvars, SCIP_Bool ismodelcons, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicSymresack (SCIP *scip, SCIP_CONS **cons, const char *name, int *perm, SCIP_VAR **vars, int nvars, SCIP_Bool ismodelcons)
 

Variable Bound Constraints

This constraint handler handles a special type of linear constraints, namely variable bound constraints. A variable bound constraint has the form

\[ lhs \leq x + c y \leq rhs \]

with coefficient \(c \in Q\), \(lhs\in Q \cup \{-\infty\}\), \(rhs\in Q \cup \{\infty\}\), and decision variables \(x\) (non-binary) and \(y\) (binary or integer).

SCIP_RETCODE SCIPcreateConsVarbound (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *var, SCIP_VAR *vbdvar, SCIP_Real vbdcoef, SCIP_Real lhs, SCIP_Real rhs, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicVarbound (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_VAR *var, SCIP_VAR *vbdvar, SCIP_Real vbdcoef, SCIP_Real lhs, SCIP_Real rhs)
 
SCIP_Real SCIPgetLhsVarbound (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Real SCIPgetRhsVarbound (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VARSCIPgetVarVarbound (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VARSCIPgetVbdvarVarbound (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Real SCIPgetVbdcoefVarbound (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Real SCIPgetDualsolVarbound (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Real SCIPgetDualfarkasVarbound (SCIP *scip, SCIP_CONS *cons)
 
SCIP_ROWSCIPgetRowVarbound (SCIP *scip, SCIP_CONS *cons)
 
SCIP_RETCODE SCIPcleanupConssVarbound (SCIP *scip, SCIP_Bool onlychecked, SCIP_Bool *infeasible, int *naddconss, int *ndelconss, int *nchgbds)
 

XOR Constraints

This constraint handler deals with "xor" constraint. These are constraint of the form:

\[ rhs = x_1 \oplus x_2 \oplus \dots \oplus x_n \]

where \(x_i\) is a binary variable for all \(i\) and \(rhs\) is bool. The variables \(x\)'s are called operators. This constraint is satisfied if \(rhs\) is TRUE and an odd number of the operators are TRUE or if the \(rhs\) is FALSE and a even number of operators are TRUE. Hence, if the sum of \(rhs\) and operators is even.

SCIP_RETCODE SCIPcreateConsXor (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_Bool rhs, int nvars, SCIP_VAR **vars, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
 
SCIP_RETCODE SCIPcreateConsBasicXor (SCIP *scip, SCIP_CONS **cons, const char *name, SCIP_Bool rhs, int nvars, SCIP_VAR **vars)
 
int SCIPgetNVarsXor (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VAR ** SCIPgetVarsXor (SCIP *scip, SCIP_CONS *cons)
 
SCIP_VARSCIPgetIntVarXor (SCIP *scip, SCIP_CONS *cons)
 
SCIP_Bool SCIPgetRhsXor (SCIP *scip, SCIP_CONS *cons)
 

Macro Definition Documentation

◆ SCIP_DECL_SOLVECUMULATIVE

#define SCIP_DECL_SOLVECUMULATIVE (   x)
Value:
SCIP_RETCODE x (int njobs, SCIP_Real* ests, SCIP_Real* lsts, SCIP_Real* objvals, \
int* durations, int* demands, int capacity, int hmin, int hmax, \
SCIP_Real timelimit, SCIP_Real memorylimit, SCIP_Longint maxnodes, \
SCIP_Bool* solved, SCIP_Bool* infeasible, SCIP_Bool* unbounded, SCIP_Bool* error)
enum SCIP_Retcode SCIP_RETCODE
Definition: type_retcode.h:63
SCIP_VAR ** x
Definition: circlepacking.c:63
#define SCIP_Bool
Definition: def.h:93
#define SCIP_Real
Definition: def.h:186
#define SCIP_Longint
Definition: def.h:171

solves given cumulative condition as independent sub problem

Note
The time and memory limit should be respected.
If the problem was solved to the earliest start times (ests) and latest start times (lsts) array contain the solution values; If the problem was not solved these two arrays contain the global bounds at the time the sub solver was interrupted.

input:

  • njobs : number of jobs (activities)
  • objvals : array of objective coefficients for each job (linear objective function), or NULL if none
  • durations : array of durations
  • demands : array of demands
  • capacity : cumulative capacity
  • hmin : left bound of time axis to be considered (including hmin)
  • hmax : right bound of time axis to be considered (not including hmax)
  • timelimit : time limit for solving in seconds
  • memorylimit : memory limit for solving in mega bytes (MB)
  • maxnodes : maximum number of branch-and-bound nodes to solve the single cumulative constraint (-1: no limit)

input/output:

  • ests : array of earliest start times for each job
  • lsts : array of latest start times for each job

output:

  • solved : pointer to store if the problem is solved (to optimality)
  • infeasible : pointer to store if the problem is infeasible
  • unbounded : pointer to store if the problem is unbounded
  • error : pointer to store if an error occurred

Definition at line 356 of file cons_cumulative.h.

◆ SCIP_DECL_LINCONSUPGD

#define SCIP_DECL_LINCONSUPGD (   x)
Value:
SCIP_RETCODE x (SCIP* scip, SCIP_CONS* cons, int nvars, SCIP_VAR** vars, SCIP_Real* vals, SCIP_Real lhs, SCIP_Real rhs, \
int nposbin, int nnegbin, int nposint, int nnegint, int nposimpl, int nnegimpl, int nposimplbin, int nnegimplbin, int nposcont, int nnegcont, \
int ncoeffspone, int ncoeffsnone, int ncoeffspint, int ncoeffsnint, int ncoeffspfrac, int ncoeffsnfrac, \
SCIP_Real poscoeffsum, SCIP_Real negcoeffsum, SCIP_Bool integral, SCIP_CONS** upgdcons)
enum SCIP_Retcode SCIP_RETCODE
Definition: type_retcode.h:63
SCIP_VAR ** x
Definition: circlepacking.c:63
#define SCIP_Bool
Definition: def.h:93
#define SCIP_Real
Definition: def.h:186

upgrading method for linear constraints into more specific constraints

input:

  • scip : SCIP main data structure
  • cons : the linear constraint to upgrade
  • nvars : number of variables in the constraint
  • vars : array with constraint variables
  • vals : array with constraint coefficients
  • lhs : left hand side of linear constraint
  • rhs : right hand side of linear constraint
  • nposbin : number of binary variables with positive coefficient
  • nnegbin : number of binary variables with negative coefficient
  • nposint : number of integer variables with positive coefficient
  • nnegint : number of integer variables with negative coefficient
  • nposimpl : number of implicit integer variables with positive coefficient (including implicit binary variables)
  • nnegimpl : number of implicit integer variables with negative coefficient (including implicit binary variables)
  • nposimplbin : number of implicit binary variables with positive coefficient
  • nnegimplbin : number of implicit binary variables with negative coefficient
  • nposcont : number of continuous variables with positive coefficient
  • nnegcont : number of continuous variables with negative coefficient
  • ncoeffspone : number of +1 coefficients
  • ncoeffsnone : number of -1 coefficients
  • ncoeffspint : number of positive integral coefficients other than +1
  • ncoeffsnint : number of negative integral coefficients other than -1
  • ncoeffspfrac : number of positive fractional coefficients
  • ncoeffsnfrac : number of negative fractional coefficients
  • poscoeffsum : sum of all positive coefficients
  • negcoeffsum : sum of all negative coefficients
  • integral : TRUE iff constraints activity value is always integral
  • upgdcons : pointer to store the upgraded constraint

Definition at line 120 of file cons_linear.h.

◆ SCIP_DECL_VERTEXPOLYFUN

#define SCIP_DECL_VERTEXPOLYFUN (   f)    SCIP_Real f (SCIP_Real* args, int nargs, void* funcdata)

evaluation callback for (vertex-polyhedral) functions used as input for facet computation of its envelopes

Parameters
[in]argsthe point to be evaluated
[in]nargsthe number of arguments of the function (length of array args)
[in]funcdatauser-data of function evaluation callback
Returns
value of function in point given by args or SCIP_INVALID if could not be evaluated

Definition at line 102 of file cons_nonlinear.h.

◆ SCIP_MAXVERTEXPOLYDIM

#define SCIP_MAXVERTEXPOLYDIM   14

maximum dimension of vertex-polyhedral function for which we can try to compute a facet of its convex or concave envelope

Definition at line 105 of file cons_nonlinear.h.

Referenced by buildVertexPolyhedralSeparationLP(), computeVertexPolyhedralFacetLP(), estimateVertexPolyhedralProduct(), SCIP_DECL_CONSEXIT(), SCIP_DECL_CONSFREE(), SCIP_DECL_NLHDLRDETECT(), and SCIPcomputeFacetVertexPolyhedralNonlinear().

◆ SCIP_DECL_NONLINCONSUPGD

#define SCIP_DECL_NONLINCONSUPGD (   x)
Value:
SCIP_RETCODE x (SCIP* scip, SCIP_CONS* cons, int nvarexprs, \
int* nupgdconss, SCIP_CONS** upgdconss, int upgdconsssize)
enum SCIP_Retcode SCIP_RETCODE
Definition: type_retcode.h:63
SCIP_VAR ** x
Definition: circlepacking.c:63

upgrading method for nonlinear constraints into more specific constraints

The method might upgrade a nonlinear constraint into a set of upgrade constraints. The caller provided an array upgdconss of size upgdconsssize to store upgrade constraints. If an upgrade is not possible, set *nupgdconss to zero. If more than upgdconsssize many constraints shall replace cons, the function should return the required number as negated value in *nupgdconss, e.g., if cons should be replaced by 3 constraints, the function should set *nupgdconss to -3 and return with SCIP_OKAY.

Parameters
[in]scipSCIP main data structure
[in]consthe nonlinear constraint to upgrade
[in]nvarexprstotal number of variable expressions in the nonlinear constraint
[out]nupgdconsspointer to store number of constraints that replace this constraint
[out]upgdconssarray to store constraints that replace this constraint
[in]upgdconsssizelength of the provided upgdconss array

Definition at line 124 of file cons_nonlinear.h.

Referenced by findAggregation().

Typedef Documentation

◆ SCIP_LINCONSUPGRADE

linear constraint update method

Definition at line 87 of file cons_linear.h.

◆ SCIP_CONSNONLINEAR_AUXEXPR

Definition at line 65 of file cons_nonlinear.h.

◆ SCIP_CONSNONLINEAR_BILINTERM

bilinear term structure

Definition at line 93 of file cons_nonlinear.h.

◆ SCIP_LINEARCONSTYPE

Definition at line 90 of file cons_pseudoboolean.h.

◆ SCIP_SETPPCTYPE

Definition at line 91 of file cons_setppc.h.

Enumeration Type Documentation

◆ SCIP_LinearConsType

solution status after solving LP

Enumerator
SCIP_LINEARCONSTYPE_INVALIDCONS 

this is no valid linear constraint type

SCIP_LINEARCONSTYPE_LINEAR 

this is the common linear constraint

SCIP_LINEARCONSTYPE_LOGICOR 

this is a logicor constraint

SCIP_LINEARCONSTYPE_KNAPSACK 

this is a knapsack constraint

SCIP_LINEARCONSTYPE_SETPPC 

this is a setppc constraint

Definition at line 77 of file cons_pseudoboolean.h.

◆ SCIP_SetppcType

type of setppc constraint: set partitioning, set packing, or set covering

Enumerator
SCIP_SETPPCTYPE_PARTITIONING 

constraint is a set partitioning constraint: sum(x) == 1

SCIP_SETPPCTYPE_PACKING 

constraint is a set packing constraint: sum(x) <= 1

SCIP_SETPPCTYPE_COVERING 

constraint is a set covering constraint: sum(x) >= 1

Definition at line 85 of file cons_setppc.h.

Function Documentation

◆ SCIPcreateConsAbspower()

SCIP_RETCODE SCIPcreateConsAbspower ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR x,
SCIP_VAR z,
SCIP_Real  exponent,
SCIP_Real  xoffset,
SCIP_Real  zcoef,
SCIP_Real  lhs,
SCIP_Real  rhs,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures an absolute power nonlinear constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Deprecated:
Use SCIPcreateConsNonlinear() instead.

creates and captures an absolute power nonlinear constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Deprecated:
Use SCIPcreateConsNonlinear() instead.
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
xnonlinear variable x in constraint
zlinear variable z in constraint
exponentexponent n of |x+offset|^n term in constraint
xoffsetoffset in |x+offset|^n term in constraint
zcoefcoefficient of z in constraint
lhsleft hand side of constraint
rhsright hand side of constraint
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 43 of file cons_abspower.c.

References SCIP_CALL, SCIP_OKAY, SCIPcreateConsBasicSignpowerNonlinear(), SCIPsetConsChecked(), SCIPsetConsDynamic(), SCIPsetConsEnforced(), SCIPsetConsInitial(), SCIPsetConsLocal(), SCIPsetConsModifiable(), SCIPsetConsPropagated(), SCIPsetConsRemovable(), SCIPsetConsSeparated(), and SCIPsetConsStickingAtNode().

◆ SCIPcreateConsBasicAbspower()

SCIP_RETCODE SCIPcreateConsBasicAbspower ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR x,
SCIP_VAR z,
SCIP_Real  exponent,
SCIP_Real  xoffset,
SCIP_Real  zcoef,
SCIP_Real  lhs,
SCIP_Real  rhs 
)

creates and captures an absolute power nonlinear constraint in its most basic version, i.e., all constraint flags are set to their basic value

All flags can be set via SCIPconsSetFLAGNAME-methods.

See also
SCIPcreateConsAbspower() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Deprecated:
Use SCIPcreateConsBasicNonlinear() instead.

creates and captures an absolute power nonlinear constraint in its most basic version, i.e., all constraint flags are set to their basic value

All flags can be set via SCIPconsSetFLAGNAME-methods.

See also
SCIPcreateConsAbspower() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Deprecated:
Use SCIPcreateConsBasicNonlinear() instead.
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
xnonlinear variable x in constraint
zlinear variable z in constraint
exponentexponent n of |x+offset|^n term in constraint
xoffsetoffset in |x+offset|^n term in constraint
zcoefcoefficient of z in constraint
lhsleft hand side of constraint
rhsright hand side of constraint

Definition at line 106 of file cons_abspower.c.

References SCIP_CALL, SCIP_OKAY, and SCIPcreateConsBasicSignpowerNonlinear().

◆ SCIPgetNlRowAbspower()

SCIP_RETCODE SCIPgetNlRowAbspower ( SCIP scip,
SCIP_CONS cons,
SCIP_NLROW **  nlrow 
)

gets the absolute power constraint as a nonlinear row representation

Deprecated:
Use SCIPgetNlRowNonlinear() instead.

gets the absolute power constraint as a nonlinear row representation

Deprecated:
Use SCIPgetNlRowNonlinear)_ instead.
Parameters
scipSCIP data structure
consconstraint
nlrowa buffer where to store pointer to nonlinear row

Definition at line 128 of file cons_abspower.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPgetNlRowNonlinear().

◆ SCIPcreateConsAnd()

SCIP_RETCODE SCIPcreateConsAnd ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR resvar,
int  nvars,
SCIP_VAR **  vars,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures an and constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a AND-constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
resvarresultant variable of the operation
nvarsnumber of operator variables in the constraint
varsarray with operator variables of constraint
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 5028 of file cons_and.c.

References ARTIFICIALVARNAMEPREFIX, consdataCreate(), CONSHDLR_NAME, FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_VARTYPE_BINARY, SCIP_VARTYPE_IMPLINT, SCIPchgVarType(), SCIPconshdlrGetData(), SCIPcreateCons(), SCIPcreateConsBasicAnd(), SCIPerrorMessage, SCIPfindConshdlr(), SCIPisTransformed(), SCIPvarGetName(), SCIPvarGetProbvar(), and SCIPvarGetType().

Referenced by CREATE_CONSTRAINT(), createAndAddAndCons(), extractGates(), findAggregation(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSPARSE(), SCIPcreateConsBasicAnd(), SCIPincludeConshdlrAnd(), setObjective(), and upgradeCons().

◆ SCIPcreateConsBasicAnd()

SCIP_RETCODE SCIPcreateConsBasicAnd ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR resvar,
int  nvars,
SCIP_VAR **  vars 
)

creates and captures an and constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsAnd(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsAnd() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures an AND-constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsAnd(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsAnd() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
resvarresultant variable of the operation
nvarsnumber of operator variables in the constraint
varsarray with operator variables of constraint

Definition at line 5138 of file cons_and.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPcreateConsAnd(), SCIPgetNVarsAnd(), and TRUE.

Referenced by getBinaryProductExprDo(), and SCIPcreateConsAnd().

◆ SCIPgetNVarsAnd()

◆ SCIPgetVarsAnd()

◆ SCIPgetResultantAnd()

◆ SCIPisAndConsSorted()

SCIP_Bool SCIPisAndConsSorted ( SCIP scip,
SCIP_CONS cons 
)

return if the variables of the AND-constraint are sorted with respect to their indices

Parameters
scipSCIP data structure
consconstraint data

Definition at line 5229 of file cons_and.c.

References CONSHDLR_NAME, FALSE, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPsortAndCons().

Referenced by computeConsAndDataChanges(), and SCIPgetResultantAnd().

◆ SCIPsortAndCons()

SCIP_RETCODE SCIPsortAndCons ( SCIP scip,
SCIP_CONS cons 
)

sort the variables of the AND-constraint with respect to their indices

Parameters
scipSCIP data structure
consconstraint data

Definition at line 5253 of file cons_and.c.

References consdataSort(), CONSHDLR_NAME, NULL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPABORT, SCIPchgAndConsCheckFlagWhenUpgr(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by computeConsAndDataChanges(), and SCIPisAndConsSorted().

◆ SCIPchgAndConsCheckFlagWhenUpgr()

SCIP_RETCODE SCIPchgAndConsCheckFlagWhenUpgr ( SCIP scip,
SCIP_CONS cons,
SCIP_Bool  flag 
)

when 'upgrading' the given AND-constraint, should the check flag for the upgraded constraint be set to TRUE, even if the check flag of this AND-constraint is set to FALSE?

Parameters
scipSCIP data structure
consconstraint data
flagshould an arising constraint from the given AND-constraint be checked, even if the check flag of the AND-constraint is set to FALSE

Definition at line 5282 of file cons_and.c.

References CONSHDLR_NAME, NULL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPABORT, SCIPchgAndConsRemovableFlagWhenUpgr(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by createAndAddAndCons(), and SCIPsortAndCons().

◆ SCIPchgAndConsRemovableFlagWhenUpgr()

SCIP_RETCODE SCIPchgAndConsRemovableFlagWhenUpgr ( SCIP scip,
SCIP_CONS cons,
SCIP_Bool  flag 
)

when 'upgrading' the given AND-constraint, should the removable flag for the upgraded constraint be set to FALSE, even if the removable flag of this AND-constraint is set to TRUE?

Parameters
scipSCIP data structure
consconstraint data
flagshould an arising constraint from the given AND-constraint be not removable, even if the removable flag of the AND-constraint is set to TRUE

Definition at line 5313 of file cons_and.c.

References CONSHDLR_NAME, NULL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by createAndAddAndCons(), and SCIPchgAndConsCheckFlagWhenUpgr().

◆ SCIPconsBendersEnforceSolution()

SCIP_RETCODE SCIPconsBendersEnforceSolution ( SCIP scip,
SCIP_SOL sol,
SCIP_CONSHDLR conshdlr,
SCIP_RESULT result,
SCIP_BENDERSENFOTYPE  type,
SCIP_Bool  checkint 
)

enforces Benders' constraints for given solution

This method is called from cons_benderslp and cons_benders. If the method is called from cons_benderslp, then the solutions are not guaranteed to be integer feasible. This is because the default priority is set greater than the integer constraint handler. If this method is called from cons_benders, then, because the default enforcement priority is set less than that of the integer constraint handler, then it can be assumed that the solutions are integer feasible.

The checkint flag indicates whether integer feasibility can be assumed. If it is not assumed, i.e. checkint == FALSE, then only the convex relaxations of the subproblems are solved. If integer feasibility is assumed, i.e. checkint == TRUE, then the convex relaxations and the full CIP are solved to generate Benders' cuts and check solution feasibility.

Parameters
scipthe SCIP instance
solthe primal solution to enforce, or NULL for the current LP/pseudo sol
conshdlrthe constraint handler
resultthe result of the enforcement
typethe type of solution being enforced
checkintshould integrality be considered when checking the subproblems

Definition at line 261 of file cons_benders.c.

References constructValidSolution(), FALSE, NULL, SCIP_BENDERSENFOTYPE_CHECK, SCIP_BENDERSENFOTYPE_LP, SCIP_BENDERSENFOTYPE_PSEUDO, SCIP_BENDERSENFOTYPE_RELAX, SCIP_Bool, SCIP_CALL, SCIP_DECL_CONSHDLRCOPY(), SCIP_DIDNOTRUN, SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_LPSOLSTAT_UNBOUNDEDRAY, SCIP_OKAY, SCIPbendersCutLP(), SCIPbendersCutPseudo(), SCIPbendersCutRelaxation(), SCIPgetBenders(), SCIPgetLPSolstat(), SCIPgetNActiveBenders(), SCIPsolveBendersSubproblems(), SCIPwarningMessage(), TRUE, and unboundedAuxiliaryVariables().

Referenced by SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSENFOPS(), SCIP_DECL_CONSENFORELAX(), and unboundedAuxiliaryVariables().

◆ SCIPcreateConsBounddisjunction()

SCIP_RETCODE SCIPcreateConsBounddisjunction ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_BOUNDTYPE boundtypes,
SCIP_Real bounds,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a bound disjunction constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsvariables of the literals in the constraint
boundtypestypes of bounds of the literals (lower or upper bounds)
boundsbounds of the literals
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 3176 of file cons_bounddisjunction.c.

References consdataCreate(), CONSHDLR_NAME, isOverlapping(), NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPboundtypeOpposite(), SCIPcreateCons(), SCIPcreateConsBasicBounddisjunction(), SCIPerrorMessage, and SCIPfindConshdlr().

Referenced by addLowerboundCons(), adjustOversizedJobBounds(), createConflict(), CUTOFF_CONSTRAINT(), forbidFixation(), presolveSingleLockedVars(), readBounds(), readSemicontinuous(), readVariables(), SCIP_DECL_CONFLICTEXEC(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSPARSE(), SCIPcreateConsBasicBounddisjunction(), and SCIPincludeConshdlrBounddisjunction().

◆ SCIPcreateConsBasicBounddisjunction()

SCIP_RETCODE SCIPcreateConsBasicBounddisjunction ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_BOUNDTYPE boundtypes,
SCIP_Real bounds 
)

creates and captures an and constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsBounddisjunction(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsBounddisjunction() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a bound disjunction constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsBounddisjunction(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsBounddisjunction() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsvariables of the literals in the constraint
boundtypestypes of bounds of the literals (lower or upper bounds)
boundsbounds of the literals

Definition at line 3256 of file cons_bounddisjunction.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPcreateConsBounddisjunction(), SCIPcreateConsBounddisjunctionRedundant(), and TRUE.

Referenced by createBounddisjunctionCons(), SCIPcreateConsBounddisjunction(), and SCIPreoptApplyGlbConss().

◆ SCIPcreateConsBounddisjunctionRedundant()

SCIP_RETCODE SCIPcreateConsBounddisjunctionRedundant ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_BOUNDTYPE boundtypes,
SCIP_Real bounds,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a bound disjunction constraint with possibly redundant literals

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsvariables of the literals in the constraint
boundtypestypes of bounds of the literals (lower or upper bounds)
boundsbounds of the literals
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 3278 of file cons_bounddisjunction.c.

References consdataCreateRedundant(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPcreateCons(), SCIPcreateConsBasicBounddisjunctionRedundant(), SCIPerrorMessage, and SCIPfindConshdlr().

Referenced by addLocalConss(), addSplitcons(), SCIPcreateConsBasicBounddisjunction(), and SCIPcreateConsBasicBounddisjunctionRedundant().

◆ SCIPcreateConsBasicBounddisjunctionRedundant()

SCIP_RETCODE SCIPcreateConsBasicBounddisjunctionRedundant ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_BOUNDTYPE boundtypes,
SCIP_Real bounds 
)

creates and captures an and constraint with possibly redundant literals in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsBounddisjunction(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsBounddisjunction() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a bound disjunction constraint with possibly redundant literals in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsBounddisjunction(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsBounddisjunction() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsvariables of the literals in the constraint
boundtypestypes of bounds of the literals (lower or upper bounds)
boundsbounds of the literals

Definition at line 3342 of file cons_bounddisjunction.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPcreateConsBounddisjunctionRedundant(), SCIPgetNVarsBounddisjunction(), and TRUE.

Referenced by SCIPcreateConsBounddisjunctionRedundant().

◆ SCIPgetNVarsBounddisjunction()

int SCIPgetNVarsBounddisjunction ( SCIP scip,
SCIP_CONS cons 
)

gets number of variables in bound disjunction constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 3361 of file cons_bounddisjunction.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetVarsBounddisjunction().

Referenced by checkBounddisjunction(), computeSymmetryGroup(), createCoveringProblem(), SCIP_DECL_CONSCOPY(), and SCIPcreateConsBasicBounddisjunctionRedundant().

◆ SCIPgetVarsBounddisjunction()

SCIP_VAR** SCIPgetVarsBounddisjunction ( SCIP scip,
SCIP_CONS cons 
)

gets array of variables in bound disjunction constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 3382 of file cons_bounddisjunction.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetBoundtypesBounddisjunction().

Referenced by checkBounddisjunction(), computeSymmetryGroup(), createCoveringProblem(), saveConsBounddisjuction(), SCIP_DECL_CONSCOPY(), and SCIPgetNVarsBounddisjunction().

◆ SCIPgetBoundtypesBounddisjunction()

SCIP_BOUNDTYPE* SCIPgetBoundtypesBounddisjunction ( SCIP scip,
SCIP_CONS cons 
)

gets array of bound types in bound disjunction constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 3403 of file cons_bounddisjunction.c.

References CONSHDLR_NAME, NULL, SCIP_Real, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetBoundsBounddisjunction().

Referenced by checkBounddisjunction(), computeSymmetryGroup(), saveConsBounddisjuction(), SCIP_DECL_CONSCOPY(), and SCIPgetVarsBounddisjunction().

◆ SCIPgetBoundsBounddisjunction()

SCIP_Real* SCIPgetBoundsBounddisjunction ( SCIP scip,
SCIP_CONS cons 
)

gets array of bounds in bound disjunction constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 3424 of file cons_bounddisjunction.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by checkBounddisjunction(), computeSymmetryGroup(), saveConsBounddisjuction(), SCIP_DECL_CONSCOPY(), and SCIPgetBoundtypesBounddisjunction().

◆ SCIPcreateConsCardinality()

SCIP_RETCODE SCIPcreateConsCardinality ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
int  cardval,
SCIP_VAR **  indvars,
SCIP_Real weights,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures an cardinality constraint

We set the constraint to not be modifable. If the weights are non NULL, the variables are ordered according to these weights (in ascending order).

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a cardinality constraint

We set the constraint to not be modifable. If the weights are non NULL, the variables are ordered according to these weights (in ascending order).

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsarray with variables of constraint entries
cardvalnumber of variables allowed to be nonzero
indvarsindicator variables indicating which variables may be treated as nonzero in cardinality constraint, or NULL if new indicator variables should be introduced automatically
weightsweights determining the variable order, or NULL if variables should be ordered in the same way they were added to the constraint
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 3319 of file cons_cardinality.c.

References CONSHDLR_NAME, FALSE, handleNewVariableCardinality(), NULL, SCIP_Bool, SCIP_CALL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_STAGE_TRANSFORMED, SCIP_VARTYPE_BINARY, SCIPaddVar(), SCIPallocBlockMemory, SCIPallocBlockMemoryArray, SCIPallocBufferArray, SCIPblkmem(), SCIPconshdlrGetData(), SCIPcreateCons(), SCIPcreateConsBasicCardinality(), SCIPcreateVar(), SCIPduplicateBlockMemoryArray, SCIPerrorMessage, SCIPfindConshdlr(), SCIPfreeBufferArray, SCIPgetNTotalVars(), SCIPgetStage(), SCIPgetTransformedVar(), SCIPhashmapCreate(), SCIPhashmapExists(), SCIPhashmapGetImage(), SCIPhashmapInsert(), SCIPreleaseVar(), SCIPsnprintf(), SCIPsortRealPtrPtrInt(), SCIPvarGetName(), SCIPvarIsBinary(), and SCIPvarIsTransformed().

Referenced by branchBalancedCardinality(), SCIPcreateConsBasicCardinality(), and SCIPincludeConshdlrCardinality().

◆ SCIPcreateConsBasicCardinality()

SCIP_RETCODE SCIPcreateConsBasicCardinality ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
int  cardval,
SCIP_VAR **  indvars,
SCIP_Real weights 
)

creates and captures an cardinality constraint in its most basic variant, i. e., with all constraint flags set to their default values, which can be set afterwards using SCIPsetConsFLAGNAME() in scip.h

See also
SCIPcreateConsCardinality() for the default constraint flag configuration
Warning
Do NOT set the constraint to be modifiable manually, because this might lead to wrong results as the variable array will not be resorted
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a cardinality constraint with all constraint flags set to their default values.

Warning
Do NOT set the constraint to be modifiable manually, because this might lead to wrong results as the variable array will not be resorted
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsarray with variables of constraint entries
cardvalnumber of variables allowed to be nonzero
indvarsindicator variables indicating which variables may be treated as nonzero in cardinality constraint, or NULL if new indicator variables should be introduced automatically
weightsweights determining the variable order, or NULL if variables should be ordered in the same way they were added to the constraint

Definition at line 3519 of file cons_cardinality.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPchgCardvalCardinality(), SCIPcreateConsCardinality(), and TRUE.

Referenced by SCIPcreateConsCardinality().

◆ SCIPchgCardvalCardinality()

SCIP_RETCODE SCIPchgCardvalCardinality ( SCIP scip,
SCIP_CONS cons,
int  cardval 
)

changes cardinality value of cardinality constraint (i.e., right hand side of cardinality constraint)

Parameters
scipSCIP data structure
conspointer to hold the created constraint
cardvalnumber of variables allowed to be nonzero

Definition at line 3540 of file cons_cardinality.c.

References CONSHDLR_NAME, NULL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPaddVarCardinality(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPdebugMsg, and SCIPerrorMessage.

Referenced by SCIPcreateConsBasicCardinality().

◆ SCIPaddVarCardinality()

SCIP_RETCODE SCIPaddVarCardinality ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var,
SCIP_VAR indvar,
SCIP_Real  weight 
)

adds variable to cardinality constraint, the position is determined by the given weight

Parameters
scipSCIP data structure
consconstraint
varvariable to add to the constraint
indvarindicator variable indicating whether variable may be treated as nonzero in cardinality constraint (or NULL if this variable should be created automatically)
weightweight determining position of variable

Definition at line 3569 of file cons_cardinality.c.

References addVarCardinality(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPappendVarCardinality(), SCIPconsGetHdlr(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPdebugMsg, SCIPerrorMessage, and SCIPvarGetName().

Referenced by SCIPchgCardvalCardinality().

◆ SCIPappendVarCardinality()

SCIP_RETCODE SCIPappendVarCardinality ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var,
SCIP_VAR indvar 
)

appends variable to cardinality constraint

Parameters
scipSCIP data structure
consconstraint
varvariable to add to the constraint
indvarindicator variable indicating whether variable may be treated as nonzero in cardinality constraint (or NULL if this variable should be created automatically)

Definition at line 3606 of file cons_cardinality.c.

References appendVarCardinality(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPconsGetHdlr(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPdebugMsg, SCIPerrorMessage, SCIPgetNVarsCardinality(), and SCIPvarGetName().

Referenced by SCIPaddVarCardinality().

◆ SCIPgetNVarsCardinality()

int SCIPgetNVarsCardinality ( SCIP scip,
SCIP_CONS cons 
)

gets number of variables in cardinality constraint

Parameters
scipSCIP data structure
consconstraint

Definition at line 3641 of file cons_cardinality.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetVarsCardinality().

Referenced by SCIPappendVarCardinality().

◆ SCIPgetVarsCardinality()

SCIP_VAR** SCIPgetVarsCardinality ( SCIP scip,
SCIP_CONS cons 
)

gets array of variables in cardinality constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 3665 of file cons_cardinality.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetCardvalCardinality().

Referenced by SCIPgetNVarsCardinality().

◆ SCIPgetCardvalCardinality()

int SCIPgetCardvalCardinality ( SCIP scip,
SCIP_CONS cons 
)

gets cardinality value of cardinality constraint (i.e., right hand side of cardinality constraint)

Parameters
scipSCIP data structure
consconstraint data

Definition at line 3689 of file cons_cardinality.c.

References CONSHDLR_NAME, NULL, SCIP_Real, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetWeightsCardinality().

Referenced by SCIPgetVarsCardinality().

◆ SCIPgetWeightsCardinality()

SCIP_Real* SCIPgetWeightsCardinality ( SCIP scip,
SCIP_CONS cons 
)

gets array of weights in cardinality constraint (or NULL if not existent)

Parameters
scipSCIP data structure
consconstraint data

Definition at line 3712 of file cons_cardinality.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by SCIPgetCardvalCardinality().

◆ SCIPcreateConsConjunction()

SCIP_RETCODE SCIPcreateConsConjunction ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nconss,
SCIP_CONS **  conss,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic 
)

creates and captures a conjunction constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nconssnumber of initial constraints in conjunction
conssinitial constraint in conjunction
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.

Definition at line 809 of file cons_conjunction.c.

References consdataCreate(), CONSHDLR_NAME, FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPcreateCons(), SCIPcreateConsBasicConjunction(), SCIPerrorMessage, and SCIPfindConshdlr().

Referenced by SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSPARSE(), SCIPcreateConsBasicConjunction(), and SCIPincludeConshdlrConjunction().

◆ SCIPcreateConsBasicConjunction()

SCIP_RETCODE SCIPcreateConsBasicConjunction ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nconss,
SCIP_CONS **  conss 
)

creates and captures an and constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsConjunction(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsConjunction() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nconssnumber of initial constraints in conjunction
conssinitial constraint in conjunction

Definition at line 858 of file cons_conjunction.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPaddConsElemConjunction(), SCIPcreateConsConjunction(), and TRUE.

Referenced by SCIPcreateConsConjunction().

◆ SCIPaddConsElemConjunction()

SCIP_RETCODE SCIPaddConsElemConjunction ( SCIP scip,
SCIP_CONS cons,
SCIP_CONS addcons 
)

adds constraint to the conjunction of constraints

Parameters
scipSCIP data structure
consconjunction constraint
addconsadditional constraint in conjunction

Definition at line 875 of file cons_conjunction.c.

References consdataAddCons(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by SCIPcreateConsBasicConjunction().

◆ SCIP_DECL_DIALOGEXEC() [1/4]

◆ SCIP_DECL_DIALOGEXEC() [2/4]

◆ SCIP_DECL_DIALOGEXEC() [3/4]

◆ SCIPcount()

SCIP_RETCODE SCIPcount ( SCIP scip)

◆ SCIPgetNCountedSols()

SCIP_Longint SCIPgetNCountedSols ( SCIP scip,
SCIP_Bool valid 
)

returns number of feasible solutions found as SCIP_Longint; if the number does not fit into a SCIP_Longint the valid flag is set to FALSE

Parameters
scipSCIP data structure
validpointer to store if the return value is valid

Definition at line 2732 of file cons_countsols.c.

References CONSHDLR_NAME, getNCountedSols(), NULL, SCIPconshdlrGetData(), SCIPfindConshdlr(), and SCIPgetNCountedSolsstr().

Referenced by SCIP_DECL_DIALOGEXEC(), SCIP_DECL_DISPOUTPUT(), and SCIPcount().

◆ SCIPgetNCountedSolsstr()

void SCIPgetNCountedSolsstr ( SCIP scip,
char **  buffer,
int  buffersize,
int *  requiredsize 
)

returns number of counted solutions as string

puts the number of counted solutions in the given char* buffer

Parameters
scipSCIP data structure
bufferbuffer to store the number for counted solutions
buffersizebuffer size
requiredsizepointer to store the required size

Definition at line 2752 of file cons_countsols.c.

References CONSHDLR_NAME, NULL, SCIP_Longint, SCIPconshdlrGetData(), SCIPfindConshdlr(), SCIPgetNCountedFeasSubtrees(), and toString().

Referenced by SCIP_DECL_DIALOGEXEC(), and SCIPgetNCountedSols().

◆ SCIPgetNCountedFeasSubtrees()

SCIP_Longint SCIPgetNCountedFeasSubtrees ( SCIP scip)

returns number of counted feasible subtrees

returns number of counted non trivial feasible subtrees

Parameters
scipSCIP data structure

Definition at line 2790 of file cons_countsols.c.

References CONSHDLR_NAME, NULL, SCIPconshdlrGetData(), SCIPfindConshdlr(), and SCIPgetCountedSparseSols().

Referenced by SCIP_DECL_DIALOGEXEC(), SCIP_DECL_DISPOUTPUT(), and SCIPgetNCountedSolsstr().

◆ SCIPgetCountedSparseSols()

void SCIPgetCountedSparseSols ( SCIP scip,
SCIP_VAR ***  vars,
int *  nvars,
SCIP_SPARSESOL ***  sols,
int *  nsols 
)

Method to get the sparse solution.

Note
You get the pointer to the sparse solutions stored in the constraint handler (not a copy).
The sparse solutions are stored w.r.t. the active variables. This are the variables which got not removed during presolving. For none active variables the value has to be computed depending on their aggregation type. See for more details about that Collect all feasible solutions.

Method to get the sparse solution.

Note
You get the pointer to the sparse solutions stored in the constraint handler (not a copy).
The sparse solutions are stored w.r.t. the active variables. There are the variables which have not been removed during presolving. For none active variables the value has to be computed depending on their aggregation type. See for more details about that Collect all feasible solutions.
Parameters
scipSCIP data structure
varspointer to active variable array defining to variable order
nvarsnumber of active variables
solspointer to the solutions
nsolspointer to number of solutions

Definition at line 2818 of file cons_countsols.c.

References CONSHDLR_NAME, NULL, SCIPconshdlrGetData(), SCIPfindConshdlr(), and SCIPsetParamsCountsols().

Referenced by SCIPgetNCountedFeasSubtrees().

◆ SCIPsetParamsCountsols()

SCIP_RETCODE SCIPsetParamsCountsols ( SCIP scip)

setting SCIP parameters for such that a valid counting process is possible

Parameters
scipSCIP data structure

Definition at line 2845 of file cons_countsols.c.

References SCIP_CALL, SCIP_OKAY, SCIP_PARAMEMPHASIS_COUNTER, SCIPsetEmphasis(), and TRUE.

Referenced by SCIPgetCountedSparseSols().

◆ SCIPcreateConsCumulative()

SCIP_RETCODE SCIPcreateConsCumulative ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
int *  durations,
int *  demands,
int  capacity,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a cumulative constraint

Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables (jobs)
varsarray of integer variable which corresponds to starting times for a job
durationsarray containing corresponding durations
demandsarray containing corresponding demands
capacityavailable cumulative capacity
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are seperated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 13740 of file cons_cumulative.c.

References consdataCatchEvents(), consdataCreate(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_STAGE_PROBLEM, SCIPconshdlrGetData(), SCIPcreateCons(), SCIPcreateConsBasicCumulative(), SCIPdebugMsg, SCIPerrorMessage, SCIPfindConshdlr(), and SCIPgetStage().

Referenced by CREATE_CONSTRAINT(), createConsCumulative(), createCumulativeCons(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSPARSE(), SCIPcreateConsBasicCumulative(), SCIPcreateSchedulingProblem(), SCIPincludeConshdlrCumulative(), and upgradeCons().

◆ SCIPcreateConsBasicCumulative()

SCIP_RETCODE SCIPcreateConsBasicCumulative ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
int *  durations,
int *  demands,
int  capacity 
)

creates and captures an absolute power constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsCumulative(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsCumulative() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a cumulative constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsCumulative(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsCumulative() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables (jobs)
varsarray of integer variable which corresponds to starting times for a job
durationsarray containing corresponding durations
demandsarray containing corresponding demands
capacityavailable cumulative capacity

Definition at line 13821 of file cons_cumulative.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPcreateConsCumulative(), SCIPsetHminCumulative(), and TRUE.

Referenced by SCIPcreateConsCumulative(), and setupAndSolveCumulativeSubscip().

◆ SCIPsetHminCumulative()

SCIP_RETCODE SCIPsetHminCumulative ( SCIP scip,
SCIP_CONS cons,
int  hmin 
)

set the left bound of effective horizon

set the left bound of the time axis to be considered (including hmin)

Parameters
scipSCIP data structure
consconstraint data
hminleft bound of time axis to be considered

Definition at line 13841 of file cons_cumulative.c.

References CONSHDLR_NAME, NULL, SCIP_INVALIDCALL, SCIP_OKAY, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetHminCumulative().

Referenced by createConsCumulative(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSPARSE(), SCIPcreateConsBasicCumulative(), setupAndSolveCumulativeSubscip(), and upgradeCons().

◆ SCIPgetHminCumulative()

int SCIPgetHminCumulative ( SCIP scip,
SCIP_CONS cons 
)

returns the left bound of the effective horizon

returns the left bound of the time axis to be considered

Parameters
scipSCIP data structure
consconstraint

Definition at line 13865 of file cons_cumulative.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPsetHmaxCumulative().

Referenced by SCIP_DECL_CONSRESPROP(), and SCIPsetHminCumulative().

◆ SCIPsetHmaxCumulative()

SCIP_RETCODE SCIPsetHmaxCumulative ( SCIP scip,
SCIP_CONS cons,
int  hmax 
)

set the right bound of the effective horizon

set the right bound of the time axis to be considered (not including hmax)

Parameters
scipSCIP data structure
consconstraint data
hmaxright bound of time axis to be considered

Definition at line 13885 of file cons_cumulative.c.

References CONSHDLR_NAME, NULL, SCIP_INVALIDCALL, SCIP_OKAY, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetHmaxCumulative().

Referenced by createConsCumulative(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSPARSE(), SCIPgetHminCumulative(), setupAndSolveCumulativeSubscip(), and upgradeCons().

◆ SCIPgetHmaxCumulative()

int SCIPgetHmaxCumulative ( SCIP scip,
SCIP_CONS cons 
)

returns the right bound of effective horizon

returns the right bound of the time axis to be considered

Parameters
scipSCIP data structure
consconstraint

Definition at line 13909 of file cons_cumulative.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetVarsCumulative().

Referenced by SCIP_DECL_CONSRESPROP(), and SCIPsetHmaxCumulative().

◆ SCIPgetVarsCumulative()

SCIP_VAR** SCIPgetVarsCumulative ( SCIP scip,
SCIP_CONS cons 
)

returns the start time variables of the cumulative constraint

returns the activities of the cumulative constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 13929 of file cons_cumulative.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetNVarsCumulative().

Referenced by SCIPgetHmaxCumulative(), and writeFzn().

◆ SCIPgetNVarsCumulative()

int SCIPgetNVarsCumulative ( SCIP scip,
SCIP_CONS cons 
)

returns the number of start time variables of the cumulative constraint

returns the activities of the cumulative constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 13950 of file cons_cumulative.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetCapacityCumulative().

Referenced by SCIPgetVarsCumulative(), and writeFzn().

◆ SCIPgetCapacityCumulative()

int SCIPgetCapacityCumulative ( SCIP scip,
SCIP_CONS cons 
)

returns the capacity of the cumulative constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 13971 of file cons_cumulative.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetDurationsCumulative().

Referenced by SCIPgetNVarsCumulative(), and writeFzn().

◆ SCIPgetDurationsCumulative()

int* SCIPgetDurationsCumulative ( SCIP scip,
SCIP_CONS cons 
)

returns the durations of the cumulative constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 13992 of file cons_cumulative.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetDemandsCumulative().

Referenced by SCIPgetCapacityCumulative(), and writeFzn().

◆ SCIPgetDemandsCumulative()

int* SCIPgetDemandsCumulative ( SCIP scip,
SCIP_CONS cons 
)

returns the demands of the cumulative constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 14013 of file cons_cumulative.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPcheckCumulativeCondition(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by SCIPgetDurationsCumulative(), and writeFzn().

◆ SCIPcheckCumulativeCondition()

SCIP_RETCODE SCIPcheckCumulativeCondition ( SCIP scip,
SCIP_SOL sol,
int  nvars,
SCIP_VAR **  vars,
int *  durations,
int *  demands,
int  capacity,
int  hmin,
int  hmax,
SCIP_Bool violated,
SCIP_CONS cons,
SCIP_Bool  printreason 
)

check for the given starting time variables with their demands and durations if the cumulative conditions for the given solution is satisfied

Parameters
scipSCIP data structure
solprimal solution, or NULL for current LP/pseudo solution
nvarsnumber of variables (jobs)
varsarray of integer variable which corresponds to starting times for a job
durationsarray containing corresponding durations
demandsarray containing corresponding demands
capacityavailable cumulative capacity
hminleft bound of time axis to be considered (including hmin)
hmaxright bound of time axis to be considered (not including hmax)
violatedpointer to store if the cumulative condition is violated
consconstraint which is checked
printreasonshould the reason for the violation be printed?

Definition at line 14036 of file cons_cumulative.c.

References checkCumulativeCondition(), NULL, SCIP_CALL, SCIP_OKAY, and SCIPnormalizeCumulativeCondition().

Referenced by checkCons(), enfopsCons(), and SCIPgetDemandsCumulative().

◆ SCIPnormalizeCumulativeCondition()

SCIP_RETCODE SCIPnormalizeCumulativeCondition ( SCIP scip,
int  nvars,
SCIP_VAR **  vars,
int *  durations,
int *  demands,
int *  capacity,
int *  nchgcoefs,
int *  nchgsides 
)

normalize cumulative condition

Parameters
scipSCIP data structure
nvarsnumber of start time variables (activities)
varsarray of start time variables
durationsarray of durations
demandsarray of demands
capacitypointer to store the changed cumulative capacity
nchgcoefspointer to count total number of changed coefficients
nchgsidespointer to count number of side changes

Definition at line 14061 of file cons_cumulative.c.

References normalizeCumulativeCondition(), SCIP_OKAY, and SCIPsplitCumulativeCondition().

Referenced by SCIP_DECL_CONSPRESOL(), and SCIPcheckCumulativeCondition().

◆ SCIPsplitCumulativeCondition()

SCIP_RETCODE SCIPsplitCumulativeCondition ( SCIP scip,
int  nvars,
SCIP_VAR **  vars,
int *  durations,
int *  demands,
int  capacity,
int *  hmin,
int *  hmax,
int *  split 
)

searches for a time point within the cumulative condition were the cumulative condition can be split

Parameters
scipSCIP data structure
nvarsnumber of variables (jobs)
varsarray of integer variable which corresponds to starting times for a job
durationsarray containing corresponding durations
demandsarray containing corresponding demands
capacityavailable cumulative capacity
hminpointer to store the left bound of the effective horizon
hmaxpointer to store the right bound of the effective horizon
splitpoint were the cumulative condition can be split

Definition at line 14078 of file cons_cumulative.c.

References computeEffectiveHorizonCumulativeCondition(), SCIP_CALL, SCIP_OKAY, and SCIPpresolveCumulativeCondition().

Referenced by SCIP_DECL_CONSPRESOL(), and SCIPnormalizeCumulativeCondition().

◆ SCIPpresolveCumulativeCondition()

SCIP_RETCODE SCIPpresolveCumulativeCondition ( SCIP scip,
int  nvars,
SCIP_VAR **  vars,
int *  durations,
int  hmin,
int  hmax,
SCIP_Bool downlocks,
SCIP_Bool uplocks,
SCIP_CONS cons,
SCIP_Bool irrelevants,
int *  nfixedvars,
int *  nchgsides,
SCIP_Bool cutoff 
)

presolve cumulative condition w.r.t. effective horizon by detecting irrelevant variables

Parameters
scipSCIP data structure
nvarsnumber of start time variables (activities)
varsarray of start time variables
durationsarray of durations
hminleft bound of time axis to be considered
hmaxright bound of time axis to be considered (not including hmax)
downlocksarray storing if the variable has a down lock, or NULL
uplocksarray storing if the variable has an up lock, or NULL
consconstraint which gets propagated, or NULL
irrelevantsarray mark those variables which are irrelevant for the cumulative condition
nfixedvarspointer to store the number of fixed variables
nchgsidespointer to store the number of changed sides
cutoffbuffer to store whether a cutoff is detected

Definition at line 14097 of file cons_cumulative.c.

References presolveConsEst(), presolveConsLct(), SCIP_CALL, SCIP_OKAY, and SCIPpropCumulativeCondition().

Referenced by presolveCumulativeCondition(), and SCIPsplitCumulativeCondition().

◆ SCIPpropCumulativeCondition()

SCIP_RETCODE SCIPpropCumulativeCondition ( SCIP scip,
SCIP_PRESOLTIMING  presoltiming,
int  nvars,
SCIP_VAR **  vars,
int *  durations,
int *  demands,
int  capacity,
int  hmin,
int  hmax,
SCIP_CONS cons,
int *  nchgbds,
SCIP_Bool initialized,
SCIP_Bool explanation,
SCIP_Bool cutoff 
)

propagate the given cumulative condition

Parameters
scipSCIP data structure
presoltimingcurrent presolving timing
nvarsnumber of variables (jobs)
varsarray of integer variable which corresponds to starting times for a job
durationsarray containing corresponding durations
demandsarray containing corresponding demands
capacityavailable cumulative capacity
hminleft bound of time axis to be considered (including hmin)
hmaxright bound of time axis to be considered (not including hmax)
consconstraint which gets propagated
nchgbdspointer to store the number of variable bound changes
initializedwas conflict analysis initialized
explanationbool array which marks the variable which are part of the explanation if a cutoff was detected, or NULL
cutoffpointer to store if the cumulative condition is violated

Definition at line 14128 of file cons_cumulative.c.

References CONSHDLR_NAME, FALSE, NULL, propagateCumulativeCondition(), SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPconshdlrGetData(), SCIPerrorMessage, SCIPfindConshdlr(), and SCIPrespropCumulativeCondition().

Referenced by propagateCons(), and SCIPpresolveCumulativeCondition().

◆ SCIPrespropCumulativeCondition()

SCIP_RETCODE SCIPrespropCumulativeCondition ( SCIP scip,
int  nvars,
SCIP_VAR **  vars,
int *  durations,
int *  demands,
int  capacity,
int  hmin,
int  hmax,
SCIP_VAR infervar,
int  inferinfo,
SCIP_BOUNDTYPE  boundtype,
SCIP_BDCHGIDX bdchgidx,
SCIP_Real  relaxedbd,
SCIP_Bool explanation,
SCIP_RESULT result 
)

resolve propagation w.r.t. the cumulative condition

Parameters
scipSCIP data structure
nvarsnumber of start time variables (activities)
varsarray of start time variables
durationsarray of durations
demandsarray of demands
capacitycumulative capacity
hminleft bound of time axis to be considered (including hmin)
hmaxright bound of time axis to be considered (not including hmax)
infervarthe conflict variable whose bound change has to be resolved
inferinfothe user information
boundtypethe type of the changed bound (lower or upper bound)
bdchgidxthe index of the bound change, representing the point of time where the change took place
relaxedbdthe relaxed bound which is sufficient to be explained
explanationbool array which marks the variable which are part of the explanation if a cutoff was detected, or NULL
resultpointer to store the result of the propagation conflict resolving call

Definition at line 14177 of file cons_cumulative.c.

References intToInferInfo(), respropCumulativeCondition(), SCIP_CALL, SCIP_OKAY, SCIPvisualizeConsCumulative(), and TRUE.

Referenced by SCIP_DECL_CONSRESPROP(), and SCIPpropCumulativeCondition().

◆ SCIPvisualizeConsCumulative()

◆ SCIPsetSolveCumulative()

SCIP_RETCODE SCIPsetSolveCumulative ( SCIP scip,
SCIP_DECL_SOLVECUMULATIVE((*solveCumulative))   
)

sets method to solve an individual cumulative condition

Parameters
scipSCIP data structure

Definition at line 14305 of file cons_cumulative.c.

References CONSHDLR_NAME, NULL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPconshdlrGetData(), SCIPerrorMessage, SCIPfindConshdlr(), SCIPsolveCumulative(), and solveCumulative().

Referenced by runShell(), and SCIPvisualizeConsCumulative().

◆ SCIPsolveCumulative()

SCIP_RETCODE SCIPsolveCumulative ( SCIP scip,
int  njobs,
SCIP_Real ests,
SCIP_Real lsts,
SCIP_Real objvals,
int *  durations,
int *  demands,
int  capacity,
int  hmin,
int  hmax,
SCIP_Real  timelimit,
SCIP_Real  memorylimit,
SCIP_Longint  maxnodes,
SCIP_Bool solved,
SCIP_Bool infeasible,
SCIP_Bool unbounded,
SCIP_Bool error 
)

solves given cumulative condition as independent sub problem

Note
If the problem was solved to the earliest start times (ests) and latest start times (lsts) array contain the solution values; If the problem was not solved these two arrays contain the global bounds at the time the sub solver was interrupted.
Parameters
scipSCIP data structure
njobsnumber of jobs (activities)
estsarray with the earlier start time for each job
lstsarray with the latest start time for each job
objvalsarray of objective coefficients for each job (linear objective function), or NULL if none
durationsarray of durations
demandsarray of demands
capacitycumulative capacity
hminleft bound of time axis to be considered (including hmin)
hmaxright bound of time axis to be considered (not including hmax)
timelimittime limit for solving in seconds
memorylimitmemory limit for solving in mega bytes (MB)
maxnodesmaximum number of branch-and-bound nodes to solve the single cumulative constraint (-1: no limit)
solvedpointer to store if the problem is solved (to optimality)
infeasiblepointer to store if the problem is infeasible
unboundedpointer to store if the problem is unbounded
errorpointer to store if an error occurred

Definition at line 14335 of file cons_cumulative.c.

References CONSHDLR_NAME, FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPconshdlrGetData(), SCIPcreateWorstCaseProfile(), SCIPerrorMessage, SCIPfindConshdlr(), and TRUE.

Referenced by applyOptcumulative(), SCIPsetSolveCumulative(), solveCumulative(), and solveIndependentCons().

◆ SCIPcreateWorstCaseProfile()

SCIP_RETCODE SCIPcreateWorstCaseProfile ( SCIP scip,
SCIP_PROFILE profile,
int  nvars,
SCIP_VAR **  vars,
int *  durations,
int *  demands 
)

creates the worst case resource profile, that is, all jobs are inserted with the earliest start and latest completion time

Parameters
scipSCIP data structure
profileresource profile
nvarsnumber of variables (jobs)
varsarray of integer variable which corresponds to starting times for a job
durationsarray containing corresponding durations
demandsarray containing corresponding demands

Definition at line 14391 of file cons_cumulative.c.

References computeImpliedEst(), computeImpliedLct(), NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPallocBufferArray, SCIPblkmem(), SCIPcomputeHmin(), SCIPconvertRealToInt(), SCIPfreeBufferArray, SCIPhashmapCreate(), SCIPhashmapFree(), SCIPhashmapInsertInt(), SCIPprofileInsertCore(), SCIPsortDownIntInt(), SCIPvarGetLbLocal(), and SCIPvarGetUbLocal().

Referenced by computeAlternativeBounds(), computeEffectiveHorizonCumulativeCondition(), propagateCons(), and SCIPsolveCumulative().

◆ SCIPcomputeHmin()

int SCIPcomputeHmin ( SCIP scip,
SCIP_PROFILE profile,
int  capacity 
)

computes w.r.t. the given worst case resource profile the first time point where the given capacity can be violated

Parameters
scipSCIP data structure
profileworst case resource profile
capacitycapacity to check

Definition at line 14470 of file cons_cumulative.c.

References SCIPcomputeHmax(), SCIPprofileGetLoads(), SCIPprofileGetNTimepoints(), and SCIPprofileGetTimepoints().

Referenced by computeAlternativeBounds(), computeEffectiveHorizonCumulativeCondition(), propagateCons(), and SCIPcreateWorstCaseProfile().

◆ SCIPcomputeHmax()

int SCIPcomputeHmax ( SCIP scip,
SCIP_PROFILE profile,
int  capacity 
)

computes w.r.t. the given worst case resource profile the first time point where the given capacity is satisfied for sure

Parameters
scipSCIP data structure
profileworst case profile
capacitycapacity to check

Definition at line 14500 of file cons_cumulative.c.

References SCIPprofileGetLoads(), SCIPprofileGetNTimepoints(), and SCIPprofileGetTimepoints().

Referenced by computeAlternativeBounds(), computeEffectiveHorizonCumulativeCondition(), and SCIPcomputeHmin().

◆ SCIPcreateConsDisjunction()

SCIP_RETCODE SCIPcreateConsDisjunction ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nconss,
SCIP_CONS **  conss,
SCIP_CONS relaxcons,
SCIP_Bool  initial,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic 
)

creates and captures a disjunction constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nconssnumber of initial constraints in disjunction
conssinitial constraint in disjunction
relaxconsa conjunction constraint containing the linear relaxation of the disjunction constraint, or NULL
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.

Definition at line 1089 of file cons_disjunction.c.

References consdataCreate(), CONSHDLR_NAME, FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPcreateCons(), SCIPcreateConsBasicDisjunction(), SCIPerrorMessage, and SCIPfindConshdlr().

Referenced by SCIPcreateConsBasicDisjunction(), and SCIPincludeConshdlrDisjunction().

◆ SCIPcreateConsBasicDisjunction()

SCIP_RETCODE SCIPcreateConsBasicDisjunction ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nconss,
SCIP_CONS **  conss,
SCIP_CONS relaxcons 
)

creates and captures a cumulative constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsDisjunction(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsDisjunction() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nconssnumber of initial constraints in disjunction
conssinitial constraint in disjunction
relaxconsa conjunction constraint containing the linear relaxation of the disjunction constraint, or NULL

Definition at line 1141 of file cons_disjunction.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPaddConsElemDisjunction(), SCIPcreateConsDisjunction(), and TRUE.

Referenced by SCIPcreateConsDisjunction().

◆ SCIPaddConsElemDisjunction()

SCIP_RETCODE SCIPaddConsElemDisjunction ( SCIP scip,
SCIP_CONS cons,
SCIP_CONS addcons 
)

adds constraint to the disjunction of constraints

Parameters
scipSCIP data structure
consdisjunction constraint
addconsadditional constraint in disjunction

Definition at line 1160 of file cons_disjunction.c.

References consdataAddCons(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by SCIPcreateConsBasicDisjunction().

◆ SCIPcreateConsIndicator()

SCIP_RETCODE SCIPcreateConsIndicator ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR binvar,
int  nvars,
SCIP_VAR **  vars,
SCIP_Real vals,
SCIP_Real  rhs,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures an indicator constraint

Note
binvar is checked to be binary only later. This enables a change of the type in procedures reading an instance.
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint (indicator or quadratic)
namename of constraint
binvarbinary indicator variable (or NULL)
nvarsnumber of variables in the inequality
varsarray with variables of inequality (or NULL)
valsvalues of variables in inequality (or NULL)
rhsrhs of the inequality
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 7435 of file cons_indicator.c.

References SCIPcreateConsIndicatorGeneric(), and TRUE.

Referenced by createIndicatorConstraint(), readIndicators(), SCIP_DECL_CONSINITPRE(), SCIP_DECL_LINCONSUPGD(), SCIPcreateConsBasicIndicator(), SCIPincludeConshdlrIndicator(), and upgradeIndicatorSuperindicator().

◆ SCIPcreateConsBasicIndicator()

SCIP_RETCODE SCIPcreateConsBasicIndicator ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR binvar,
int  nvars,
SCIP_VAR **  vars,
SCIP_Real vals,
SCIP_Real  rhs 
)

creates and captures an indicator constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsIndicator(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsIndicator() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint (indicator or quadratic)
namename of constraint
binvarbinary indicator variable (or NULL)
nvarsnumber of variables in the inequality
varsarray with variables of inequality (or NULL)
valsvalues of variables in inequality (or NULL)
rhsrhs of the inequality

Definition at line 7724 of file cons_indicator.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPcreateConsIndicator(), SCIPcreateConsIndicatorGenericLinCons(), and TRUE.

Referenced by SCIPcreateConsIndicatorGeneric().

◆ SCIPcreateConsIndicatorGeneric()

SCIP_RETCODE SCIPcreateConsIndicatorGeneric ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR binvar,
int  nvars,
SCIP_VAR **  vars,
SCIP_Real vals,
SCIP_Real  rhs,
SCIP_Bool  activeone,
SCIP_Bool  lessthanineq,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a indicator constraint in a more generic version.

The key difference from SCIPcreateConsIndicator() is the activeone and lessthanineq Booleans. If \(z = o\), with \(o\) the activeone flag, then: if lessthanineq then \(a^T x \leq b\) holds, else the passed vectors are assumed to be of the form \(a^T x \geq b\). The underlying linear constraint is always created as a less-than inequality.

Parameters
scipSCIP data structure
conspointer to hold the created constraint (indicator or quadratic)
namename of constraint
binvarbinary indicator variable (or NULL)
nvarsnumber of variables in the inequality
varsarray with variables of inequality (or NULL)
valsvalues of variables in inequality (or NULL)
rhsrhs of the inequality
activeoneis the constraint active when the binary is 1?
lessthanineqis the linear constraint a less than RHS (TRUE) or greater than RHS (FALSE)?
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 7476 of file cons_indicator.c.

References consdataCreate(), CONSHDLR_NAME, FALSE, NULL, REALABS, SCIP_Bool, SCIP_CALL, SCIP_INVALIDDATA, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIP_VARTYPE_CONTINUOUS, SCIP_VARTYPE_IMPLINT, SCIPaddCoefLinear(), SCIPaddCons(), SCIPaddVar(), SCIPallocBufferArray, SCIPblkmem(), SCIPceil(), SCIPconsAddUpgradeLocks(), SCIPconsGetNUpgradeLocks(), SCIPconshdlrGetData(), SCIPcreateCons(), SCIPcreateConsBasicIndicator(), SCIPcreateConsLinear(), SCIPcreateConsQuadraticNonlinear(), SCIPcreateVar(), SCIPerrorMessage, SCIPfindConshdlr(), SCIPfreeBufferArray, SCIPgetNegatedVar(), SCIPgetNOrigVars(), SCIPhashmapCreate(), SCIPhashmapExists(), SCIPhashmapInsert(), SCIPinfinity(), SCIPisIntegral(), SCIPisTransformed(), SCIPisZero(), SCIPmarkDoNotMultaggrVar(), SCIPsnprintf(), SCIPvarGetType(), SCIPvarIsIntegral(), and TRUE.

Referenced by SCIPcreateConsIndicator().

◆ SCIPcreateConsIndicatorLinCons()

SCIP_RETCODE SCIPcreateConsIndicatorLinCons ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR binvar,
SCIP_CONS lincons,
SCIP_VAR slackvar,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures an indicator constraint with given linear constraint and slack variable

Note
binvar is checked to be binary only later. This enables a change of the type in procedures reading an instance.
we assume that slackvar actually appears in lincons and we also assume that it takes the role of a slack variable!
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
binvarbinary indicator variable (or NULL)
linconslinear constraint
slackvarslack variable
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 7905 of file cons_indicator.c.

References SCIPcreateConsBasicIndicatorLinCons(), SCIPcreateConsIndicatorGenericLinCons(), and TRUE.

Referenced by createSubSCIP(), readIndicators(), SCIP_DECL_CONSPARSE(), SCIPcreateConsBasicIndicatorLinCons(), and SCIPcreateConsIndicatorGenericLinCons().

◆ SCIPcreateConsIndicatorGenericLinCons()

SCIP_RETCODE SCIPcreateConsIndicatorGenericLinCons ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR binvar,
SCIP_CONS lincons,
SCIP_VAR slackvar,
SCIP_Bool  activeone,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures an indicator constraint with given linear constraint and slack variable in a generic version, i. e., with a flag activeone indicating whether the constraint is active on value 1 or 0 of the binary variable.

Note
binvar is checked to be binary only later. This enables a change of the type in procedures reading an instance.
we assume that slackvar actually appears in lincons and we also assume that it takes the role of a slack variable!
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
See also
SCIPcreateConsIndicatorLinCons() for information about the basic constraint flag configuration
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
binvarbinary indicator variable (or NULL)
linconslinear constraint
slackvarslack variable
activeoneis the constraint active when the binary is 1?
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 7757 of file cons_indicator.c.

References consdataCreate(), CONSHDLR_NAME, FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIP_VARTYPE_CONTINUOUS, SCIP_VARTYPE_IMPLINT, SCIPcaptureCons(), SCIPcaptureVar(), SCIPconsAddUpgradeLocks(), SCIPconsGetHdlr(), SCIPconsGetNUpgradeLocks(), SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPcreateCons(), SCIPcreateConsIndicatorLinCons(), SCIPcreateConsQuadraticNonlinear(), SCIPerrorMessage, SCIPfindConshdlr(), SCIPgetNegatedVar(), SCIPgetNVarsLinear(), SCIPgetVarsLinear(), SCIPmarkDoNotMultaggrVar(), SCIPvarGetType(), and TRUE.

Referenced by SCIP_DECL_CONSCOPY(), SCIPcreateConsBasicIndicator(), and SCIPcreateConsIndicatorLinCons().

◆ SCIPcreateConsBasicIndicatorLinCons()

SCIP_RETCODE SCIPcreateConsBasicIndicatorLinCons ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR binvar,
SCIP_CONS lincons,
SCIP_VAR slackvar 
)

creates and captures an indicator constraint with given linear constraint and slack variable in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsIndicator(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

Note
binvar is checked to be binary only later. This enables a change of the type in procedures reading an instance.
we assume that slackvar actually appears in lincons and we also assume that it takes the role of a slack variable!
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
See also
SCIPcreateConsIndicatorLinCons() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
binvarbinary indicator variable (or NULL)
linconslinear constraint
slackvarslack variable

Definition at line 7954 of file cons_indicator.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPaddVarIndicator(), SCIPcreateConsIndicatorLinCons(), and TRUE.

Referenced by SCIPcreateConsIndicatorLinCons().

◆ SCIPaddVarIndicator()

SCIP_RETCODE SCIPaddVarIndicator ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var,
SCIP_Real  val 
)

adds variable to the inequality of the indicator constraint

Parameters
scipSCIP data structure
consindicator constraint
varvariable to add to the inequality
valvalue of variable

Definition at line 7973 of file cons_indicator.c.

References CONSHDLR_NAME, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_VARTYPE_CONTINUOUS, SCIPaddCoefLinear(), SCIPchgVarType(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPgetLinearConsIndicator(), SCIPisIntegral(), SCIPvarGetType(), and SCIPvarIsIntegral().

Referenced by SCIPcreateConsBasicIndicatorLinCons().

◆ SCIPgetLinearConsIndicator()

SCIP_CONS* SCIPgetLinearConsIndicator ( SCIP_CONS cons)

gets the linear constraint corresponding to the indicator constraint (may be NULL)

Parameters
consindicator constraint

Definition at line 8008 of file cons_indicator.c.

References CONSHDLR_NAME, NULL, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPsetLinearConsIndicator().

Referenced by computeRanks(), createSubSCIP(), SCIP_DECL_LINCONSUPGD(), SCIPaddVarIndicator(), SCIPwriteLp(), SCIPwriteMps(), and writeOpbConstraints().

◆ SCIPsetLinearConsIndicator()

SCIP_RETCODE SCIPsetLinearConsIndicator ( SCIP scip,
SCIP_CONS cons,
SCIP_CONS lincons 
)

sets the linear constraint corresponding to the indicator constraint (may be NULL)

Parameters
scipSCIP data structure
consindicator constraint
linconslinear constraint

Definition at line 8025 of file cons_indicator.c.

References CONSHDLR_NAME, FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_INVALIDCALL, SCIP_OKAY, SCIP_STAGE_PROBLEM, SCIP_VARTYPE_CONTINUOUS, SCIP_VARTYPE_IMPLINT, SCIPcaptureCons(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPdelCons(), SCIPerrorMessage, SCIPgetActiveOnIndicator(), SCIPgetNVarsLinear(), SCIPgetStage(), SCIPgetVarsLinear(), SCIPreleaseCons(), SCIPvarGetType(), and TRUE.

Referenced by SCIPgetLinearConsIndicator().

◆ SCIPsetBinaryVarIndicator()

SCIP_RETCODE SCIPsetBinaryVarIndicator ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR binvar 
)

◆ SCIPgetActiveOnIndicator()

SCIP_Bool SCIPgetActiveOnIndicator ( SCIP_CONS cons)

gets activation value of an indicator constraint, TRUE for active on 1, FALSE for active on 0

Parameters
consindicator constraint

Definition at line 8095 of file cons_indicator.c.

References CONSHDLR_NAME, NULL, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPgetBinaryVarIndicator().

Referenced by SCIPsetLinearConsIndicator().

◆ SCIPgetBinaryVarIndicator()

SCIP_VAR* SCIPgetBinaryVarIndicator ( SCIP_CONS cons)

gets binary variable corresponding to indicator constraint. Returns the negative of the original binary variable if activeone was set to false

gets binary variable corresponding to indicator constraint

Parameters
consindicator constraint

Definition at line 8112 of file cons_indicator.c.

References CONSHDLR_NAME, NULL, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPgetBinaryVarIndicatorGeneric().

Referenced by computeRanks(), createCoveringProblem(), createSubSCIP(), SCIP_DECL_CONFLICTEXEC(), SCIP_DECL_CONSGETDIVEBDCHGS(), SCIP_DECL_HEUREXEC(), SCIPgetActiveOnIndicator(), SCIPwriteGms(), SCIPwriteLp(), SCIPwriteMps(), tryOneOpt(), trySolCandidate(), and writeOpbConstraints().

◆ SCIPgetBinaryVarIndicatorGeneric()

SCIP_VAR* SCIPgetBinaryVarIndicatorGeneric ( SCIP_CONS cons)

similar to SCIPgetBinaryVarIndicator but returns the original binary variable passed by the user.

Parameters
consindicator constraint

Definition at line 8128 of file cons_indicator.c.

References CONSHDLR_NAME, NULL, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPsetBinaryVarIndicator(), and SCIPvarGetNegationVar().

Referenced by SCIPgetBinaryVarIndicator().

◆ SCIPgetSlackVarIndicator()

SCIP_VAR* SCIPgetSlackVarIndicator ( SCIP_CONS cons)

gets slack variable corresponding to indicator constraint

Parameters
consindicator constraint

Definition at line 8231 of file cons_indicator.c.

References CONSHDLR_NAME, NULL, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPsetSlackVarUb().

Referenced by createSubSCIP(), SCIP_DECL_CONFLICTEXEC(), SCIPsetBinaryVarIndicator(), SCIPwriteGms(), SCIPwriteLp(), SCIPwriteMps(), and writeOpbConstraints().

◆ SCIPsetSlackVarUb()

SCIP_RETCODE SCIPsetSlackVarUb ( SCIP scip,
SCIP_CONS cons,
SCIP_Real  ub 
)

sets upper bound for slack variable corresponding to indicator constraint

Use with care if you know that the maximal violation of the corresponding constraint is at most ub. This bound might be improved automatically during the solution process.

Precondition
This method should only be called if SCIP is in one of the following stages:
Parameters
scipSCIP data structure
consindicator constraint
ubupper bound for slack variable

Definition at line 8256 of file cons_indicator.c.

References CONSHDLR_NAME, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_STAGE_PROBLEM, SCIPchgVarUb(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPgetStage(), and SCIPisViolatedIndicator().

Referenced by SCIPgetSlackVarIndicator().

◆ SCIPisViolatedIndicator()

SCIP_Bool SCIPisViolatedIndicator ( SCIP scip,
SCIP_CONS cons,
SCIP_SOL sol 
)

checks whether indicator constraint is violated w.r.t. sol

Parameters
scipSCIP data structure
consindicator constraint
solsolution, or NULL to use current node's solution

Definition at line 8282 of file cons_indicator.c.

References FALSE, NULL, SCIPconsGetData(), SCIPconsIsDeleted(), SCIPgetSolVal(), SCIPisFeasPositive(), SCIPmakeIndicatorFeasible(), and TRUE.

Referenced by SCIP_DECL_CONSGETDIVEBDCHGS(), and SCIPsetSlackVarUb().

◆ SCIPmakeIndicatorFeasible()

SCIP_RETCODE SCIPmakeIndicatorFeasible ( SCIP scip,
SCIP_CONS cons,
SCIP_SOL sol,
SCIP_Bool changed 
)

based on values of other variables, computes slack and binary variable to turn constraint feasible

based on values of other variables, computes slack and binary variable to turn constraint feasible

It will also clean up the solution, i.e., shift slack variable, as follows:

If the inequality is \(a^T x + \gamma\, s \leq \beta\), the value of the slack variable \(s\) to achieve equality is

\[ s^* = \frac{\beta - a^T x^*}{\gamma}, \]

where \(x^*\) is the given solution. In case of \(a^T x + \gamma\, s \geq \alpha\), we arrive at

\[ s^* = \frac{\alpha - a^T x^*}{\gamma}. \]

The typical values of \(\gamma\) in the first case is -1 and +1 in the second case.

Now, let \(\sigma\) be the sign of \(\gamma\) in the first case and \(-\gamma\) in the second case. Thus, if \(\sigma > 0\) and \(s^* < 0\), the inequality cannot be satisfied by a nonnegative value for the slack variable; in this case, we have to leave the values as they are. If \(\sigma < 0\) and \(s^* > 0\), the solution violates the indicator constraint (we can set the slack variable to value \(s^*\)). If \(\sigma < 0\) and \(s^* \leq 0\) or \(\sigma > 0\) and \(s^* \geq 0\), the constraint is satisfied, and we can set the slack variable to 0.

Parameters
scipSCIP data structure
consindicator constraint
solsolution
changedpointer to store whether the solution has been changed

Definition at line 8337 of file cons_indicator.c.

References CONSHDLR_NAME, FALSE, NULL, REALABS, SCIP_CALL, SCIP_LOCKTYPE_MODEL, SCIP_OKAY, SCIP_Real, SCIP_STAGE_INITPRESOLVE, SCIP_VARSTATUS_FIXED, SCIP_VARSTATUS_NEGATED, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPconsIsActive(), SCIPgetLhsLinear(), SCIPgetNVarsLinear(), SCIPgetRhsLinear(), SCIPgetSolVal(), SCIPgetStage(), SCIPgetValsLinear(), SCIPgetVarsLinear(), SCIPisFeasEQ(), SCIPisFeasGE(), SCIPisFeasNegative(), SCIPisFeasPositive(), SCIPisFeasZero(), SCIPisInfinity(), SCIPisZero(), SCIPmakeIndicatorsFeasible(), SCIPsetSolVal(), SCIPvarGetLbLocal(), SCIPvarGetNegationVar(), SCIPvarGetNLocksDownType(), SCIPvarGetNLocksUpType(), SCIPvarGetStatus(), TRUE, and varGetObjDelta().

Referenced by SCIP_DECL_CONSCHECK(), SCIPisViolatedIndicator(), and SCIPmakeIndicatorsFeasible().

◆ SCIPmakeIndicatorsFeasible()

SCIP_RETCODE SCIPmakeIndicatorsFeasible ( SCIP scip,
SCIP_CONSHDLR conshdlr,
SCIP_SOL sol,
SCIP_Bool changed 
)

based on values of other variables, computes slack and binary variable to turn all constraints feasible

Parameters
scipSCIP data structure
conshdlrindicator constraint handler
solsolution
changedpointer to store whether the solution has been changed

Definition at line 8512 of file cons_indicator.c.

References CONSHDLR_NAME, FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_STAGE_INITPRESOLVE, SCIPaddLinearConsIndicator(), SCIPconsGetData(), SCIPconshdlrGetConss(), SCIPconshdlrGetName(), SCIPconshdlrGetNConss(), SCIPgetStage(), and SCIPmakeIndicatorFeasible().

Referenced by SCIPmakeIndicatorFeasible(), and SCIPperformGenericDivingAlgorithm().

◆ SCIPaddLinearConsIndicator()

SCIP_RETCODE SCIPaddLinearConsIndicator ( SCIP scip,
SCIP_CONSHDLR conshdlr,
SCIP_CONS lincons 
)

adds additional linear constraint that is not connected with an indicator constraint, but can be used for separation

Parameters
scipSCIP data structure
conshdlrindicator constraint handler
linconslinear constraint

Definition at line 8559 of file cons_indicator.c.

References consdataEnsureAddLinConsSize(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIPaddRowIndicator(), SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPconsIsLocal(), and SCIPconsIsModifiable().

Referenced by SCIPmakeIndicatorsFeasible().

◆ SCIPaddRowIndicator()

SCIP_RETCODE SCIPaddRowIndicator ( SCIP scip,
SCIP_CONSHDLR conshdlr,
SCIP_ROW row 
)

adds additional globally valid row that is not connected with an indicator constraint, but can be used for separation

adds additional row that is not connected with an indicator constraint, but can be used for separation

Note
The row is directly added to the alternative polyhedron and is not stored.
Parameters
scipSCIP data structure
conshdlrindicator constraint handler
rowrow to add

Definition at line 8591 of file cons_indicator.c.

References addAltLPRow(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPdebugMsg, SCIProwGetName(), and SCIProwIsLocal().

Referenced by SCIPaddLinearConsIndicator().

◆ SCIPcreateConsKnapsack()

SCIP_RETCODE SCIPcreateConsKnapsack ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Longint weights,
SCIP_Longint  capacity,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a knapsack constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a knapsack constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()! [SnippetConsCreationKnapsack]
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of items in the knapsack
varsarray with item variables
weightsarray with item weights
capacitycapacity of knapsack (right hand side of inequality)
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 13558 of file cons_knapsack.c.

References catchEvents(), consdataCreate(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_Longint, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPconshdlrGetData(), SCIPcreateCons(), SCIPcreateConsBasicKnapsack(), SCIPerrorMessage, SCIPfindConshdlr(), and SCIPisTransformed().

Referenced by createAndAddLinearCons(), createCapacityRestriction(), createMipCpFormulation(), createNormalizedKnapsack(), createRow(), presolRoundCardinality(), and SCIPcreateConsBasicKnapsack().

◆ SCIPcreateConsBasicKnapsack()

SCIP_RETCODE SCIPcreateConsBasicKnapsack ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Longint weights,
SCIP_Longint  capacity 
)

creates and captures a knapsack constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsKnapsack(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsKnapsack() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

! [SnippetConsCreationKnapsack] creates and captures a knapsack constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsKnapsack(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsKnapsack() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of items in the knapsack
varsarray with item variables
weightsarray with item weights
capacitycapacity of knapsack

Definition at line 13633 of file cons_knapsack.c.

References FALSE, NULL, SCIP_CALL, SCIP_Longint, SCIP_OKAY, SCIPaddCoefKnapsack(), SCIPcreateConsKnapsack(), and TRUE.

Referenced by createIntervalRelaxation(), createMipFormulation(), initPricing(), SCIP_DECL_SOLVECUMULATIVE(), and SCIPcreateConsKnapsack().

◆ SCIPaddCoefKnapsack()

SCIP_RETCODE SCIPaddCoefKnapsack ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var,
SCIP_Longint  weight 
)

adds new item to knapsack constraint

Parameters
scipSCIP data structure
consconstraint data
varitem variable
weightitem weight

Definition at line 13652 of file cons_knapsack.c.

Referenced by addCoefTerm(), createCapacityRestriction(), createIntervalRelaxation(), createMipCpFormulation(), createMipFormulation(), SCIP_DECL_SOLVECUMULATIVE(), SCIPaddCoefPseudoboolean(), SCIPconsAddCoef(), and SCIPcreateConsBasicKnapsack().

◆ SCIPgetCapacityKnapsack()

◆ SCIPchgCapacityKnapsack()

SCIP_RETCODE SCIPchgCapacityKnapsack ( SCIP scip,
SCIP_CONS cons,
SCIP_Longint  capacity 
)

changes capacity of the knapsack constraint

Note
This method can only be called during problem creation stage (SCIP_STAGE_PROBLEM)
Parameters
scipSCIP data structure
consconstraint data
capacitynew capacity of knapsack

Definition at line 13700 of file cons_knapsack.c.

Referenced by SCIPgetCapacityKnapsack().

◆ SCIPgetNVarsKnapsack()

◆ SCIPgetVarsKnapsack()

SCIP_VAR** SCIPgetVarsKnapsack ( SCIP scip,
SCIP_CONS cons 
)

◆ SCIPgetWeightsKnapsack()

SCIP_Longint* SCIPgetWeightsKnapsack ( SCIP scip,
SCIP_CONS cons 
)

◆ SCIPgetDualsolKnapsack()

SCIP_Real SCIPgetDualsolKnapsack ( SCIP scip,
SCIP_CONS cons 
)

gets the dual solution of the knapsack constraint in the current LP

Parameters
scipSCIP data structure
consconstraint data

Definition at line 13800 of file cons_knapsack.c.

References NULL, SCIP_INVALID, SCIP_Real, SCIPABORT, SCIPconsGetData(), SCIPerrorMessage, SCIPgetDualfarkasKnapsack(), and SCIProwGetDualsol().

Referenced by SCIPconsGetDualsol(), and SCIPgetWeightsKnapsack().

◆ SCIPgetDualfarkasKnapsack()

SCIP_Real SCIPgetDualfarkasKnapsack ( SCIP scip,
SCIP_CONS cons 
)

gets the dual Farkas value of the knapsack constraint in the current infeasible LP

Parameters
scipSCIP data structure
consconstraint data

Definition at line 13826 of file cons_knapsack.c.

References NULL, SCIP_INVALID, SCIPABORT, SCIPconsGetData(), SCIPerrorMessage, SCIPgetRowKnapsack(), and SCIProwGetDualfarkas().

Referenced by SCIPconsGetDualfarkas(), and SCIPgetDualsolKnapsack().

◆ SCIPgetRowKnapsack()

SCIP_ROW* SCIPgetRowKnapsack ( SCIP scip,
SCIP_CONS cons 
)

returns the linear relaxation of the given knapsack constraint; may return NULL if no LP row was yet created; the user must not modify the row!

Parameters
scipSCIP data structure
consconstraint data

Definition at line 13854 of file cons_knapsack.c.

References NULL, SCIP_Bool, SCIPABORT, SCIPcleanupConssKnapsack(), SCIPconsGetData(), and SCIPerrorMessage.

Referenced by SCIPconsGetRow(), and SCIPgetDualfarkasKnapsack().

◆ SCIPsolveKnapsackExactly()

SCIP_RETCODE SCIPsolveKnapsackExactly ( SCIP scip,
int  nitems,
SCIP_Longint weights,
SCIP_Real profits,
SCIP_Longint  capacity,
int *  items,
int *  solitems,
int *  nonsolitems,
int *  nsolitems,
int *  nnonsolitems,
SCIP_Real solval,
SCIP_Bool success 
)

solves knapsack problem in maximization form exactly using dynamic programming; if needed, one can provide arrays to store all selected items and all not selected items

Note
in case you provide the solitems or nonsolitems array you also have to provide the counter part, as well
the algorithm will first compute a greedy solution and terminate if the greedy solution is proven to be optimal. The dynamic programming algorithm runs with a time and space complexity of O(nitems * capacity).

solves knapsack problem in maximization form exactly using dynamic programming; if needed, one can provide arrays to store all selected items and all not selected items

Note
in case you provide the solitems or nonsolitems array you also have to provide the counter part, as well
the algorithm will first compute a greedy solution and terminate if the greedy solution is proven to be optimal. The dynamic programming algorithm runs with a time and space complexity of O(nitems * capacity).
Parameters
scipSCIP data structure
nitemsnumber of available items
weightsitem weights
profitsitem profits
capacitycapacity of knapsack
itemsitem numbers
solitemsarray to store items in solution, or NULL
nonsolitemsarray to store items not in solution, or NULL
nsolitemspointer to store number of items in solution, or NULL
nnonsolitemspointer to store number of items not in solution, or NULL
solvalpointer to store optimal solution value, or NULL
successpointer to store if an error occured during solving (normally a memory problem)

Definition at line 1100 of file cons_knapsack.c.

References FALSE, IDX, MAX, NULL, SCIP_Bool, SCIP_CALL, SCIP_Longint, SCIP_LONGINT_MAX, SCIP_NOMEMORY, SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPcalcGreComDiv(), SCIPdebugMsg, SCIPfloor(), SCIPfreeBufferArray, SCIPisGE(), SCIPisIntegral(), SCIPselectWeightedDownRealLongRealInt(), SCIPsolveKnapsackApproximately(), SCIPsortDownRealIntLong(), and TRUE.

Referenced by buildFlowCover(), and getHighestCapacityUsage().

◆ SCIPsolveKnapsackApproximately()

SCIP_RETCODE SCIPsolveKnapsackApproximately ( SCIP scip,
int  nitems,
SCIP_Longint weights,
SCIP_Real profits,
SCIP_Longint  capacity,
int *  items,
int *  solitems,
int *  nonsolitems,
int *  nsolitems,
int *  nnonsolitems,
SCIP_Real solval 
)

solves knapsack problem in maximization form approximately by solving the LP-relaxation of the problem using Dantzig's method and rounding down the solution; if needed, one can provide arrays to store all selected items and all not selected items

Parameters
scipSCIP data structure
nitemsnumber of available items
weightsitem weights
profitsitem profits
capacitycapacity of knapsack
itemsitem numbers
solitemsarray to store items in solution, or NULL
nonsolitemsarray to store items not in solution, or NULL
nsolitemspointer to store number of items in solution, or NULL
nnonsolitemspointer to store number of items not in solution, or NULL
solvalpointer to store optimal solution value, or NULL

Definition at line 1604 of file cons_knapsack.c.

References GUBconsCreate(), SCIP_GUBSet::gubconss, SCIP_GUBCons::gubvars, SCIP_GUBSet::ngubconss, SCIP_GUBCons::ngubvars, NULL, SCIP_CALL, SCIP_Longint, SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPdebugMsg, SCIPfreeBufferArray, SCIPisFeasGT(), SCIPselectWeightedDownRealLongRealInt(), and SCIPvarGetName().

Referenced by getCover(), and SCIPsolveKnapsackExactly().

◆ SCIPseparateKnapsackCuts()

SCIP_RETCODE SCIPseparateKnapsackCuts ( SCIP scip,
SCIP_CONS cons,
SCIP_SEPA sepa,
SCIP_VAR **  vars,
int  nvars,
SCIP_Longint weights,
SCIP_Longint  capacity,
SCIP_SOL sol,
SCIP_Bool  usegubs,
SCIP_Bool cutoff,
int *  ncuts 
)

separates different classes of valid inequalities for the 0-1 knapsack problem

Parameters
scipSCIP data structure
consoriginating constraint of the knapsack problem, or NULL
sepaoriginating separator of the knapsack problem, or NULL
varsvariables in knapsack constraint
nvarsnumber of variables in knapsack constraint
weightsweights of variables in knapsack constraint
capacitycapacity of knapsack
solprimal SCIP solution to separate, NULL for current LP solution
usegubsshould GUB information be used for separation?
cutoffpointer to store whether a cutoff has been detected
ncutspointer to add up the number of found cuts

Definition at line 5565 of file cons_knapsack.c.

References FALSE, getCover(), getFeasibleSet(), GUBsetCreate(), GUBsetFree(), GUBsetGetCliquePartition(), makeCoverMinimal(), SCIP_GUBSet::ngubconss, NULL, SCIP_GUBSet::nvars, SCIP_Bool, SCIP_CALL, SCIP_Longint, SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPconsGetName(), SCIPdebugMsg, SCIPdebugMsgPrint, SCIPfreeBufferArray, SCIPgetSolVals(), SCIPincConsAge(), SCIPseparateRelaxedKnapsack(), SCIPvarGetName(), separateSequLiftedMinimalCoverInequality(), separateSupLiftedMinimalCoverInequality(), TRUE, and USESUPADDLIFT.

Referenced by getFeasibleSet(), SCIPseparateRelaxedKnapsack(), and separateCons().

◆ SCIPseparateRelaxedKnapsack()

SCIP_RETCODE SCIPseparateRelaxedKnapsack ( SCIP scip,
SCIP_CONS cons,
SCIP_SEPA sepa,
int  nknapvars,
SCIP_VAR **  knapvars,
SCIP_Real knapvals,
SCIP_Real  valscale,
SCIP_Real  rhs,
SCIP_SOL sol,
SCIP_Bool cutoff,
int *  ncuts 
)
Parameters
scipSCIP data structure
consoriginating constraint of the knapsack problem, or NULL
sepaoriginating separator of the knapsack problem, or NULL
nknapvarsnumber of variables in the continuous knapsack constraint
knapvarsvariables in the continuous knapsack constraint
knapvalscoefficients of the variables in the continuous knapsack constraint
valscale-1.0 if lhs of row is used as rhs of c. k. constraint, +1.0 otherwise
rhsright hand side of the continuous knapsack constraint
solprimal CIP solution, NULL for current LP solution
cutoffpointer to store whether a cutoff was found
ncutspointer to add up the number of found cuts

Definition at line 5782 of file cons_knapsack.c.

References BMSclearMemoryArray, CONSHDLR_NAME, DEFAULT_USEGUBS, FALSE, KNAPSACKRELAX_MAXDELTA, KNAPSACKRELAX_MAXDNOM, KNAPSACKRELAX_MAXSCALE, MAXABSVBCOEF, NULL, REALABS, SCIP_Bool, SCIP_CALL, SCIP_Longint, SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPcalcIntegralScalar(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPdebug, SCIPdebugMsg, SCIPdebugMsgPrint, SCIPdebugPrintCons, SCIPepsilon(), SCIPfeasFloor(), SCIPfindConshdlr(), SCIPfloor(), SCIPfreeBufferArray, SCIPgetNContVars(), SCIPgetNegatedVar(), SCIPgetNVars(), SCIPgetSolVal(), SCIPgetVars(), SCIPisFeasGT(), SCIPisFeasLT(), SCIPisGE(), SCIPisGT(), SCIPisInfinity(), SCIPisLE(), SCIPisLT(), SCIPreallocBlockMemoryArray, SCIPseparateKnapsackCuts(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetNVlbs(), SCIPvarGetNVubs(), SCIPvarGetProbindex(), SCIPvarGetUbGlobal(), SCIPvarGetUbLocal(), SCIPvarGetVlbCoefs(), SCIPvarGetVlbConstants(), SCIPvarGetVlbVars(), SCIPvarGetVubCoefs(), SCIPvarGetVubConstants(), SCIPvarGetVubVars(), SCIPvarIsActive(), SCIPvarIsBinary(), separateCons(), and TRUE.

Referenced by addCut(), and SCIPseparateKnapsackCuts().

◆ SCIPcleanupConssKnapsack()

SCIP_RETCODE SCIPcleanupConssKnapsack ( SCIP scip,
SCIP_Bool  onlychecked,
SCIP_Bool infeasible 
)

cleans up (multi-)aggregations and fixings from knapsack constraints

Parameters
scipSCIP data structure
onlycheckedshould only checked constraints be cleaned up?
infeasiblepointer to return whether the problem was detected to be infeasible

Definition at line 13877 of file cons_knapsack.c.

Referenced by SCIPgetRowKnapsack(), and SCIPmatrixCreate().

◆ SCIPincludeLinconsUpgrade()

SCIP_RETCODE SCIPincludeLinconsUpgrade ( SCIP scip,
SCIP_DECL_LINCONSUPGD((*linconsupgd))  ,
int  priority,
const char *  conshdlrname 
)

includes a linear constraint update method into the linear constraint handler

Parameters
scipSCIP data structure
prioritypriority of upgrading method
conshdlrnamename of the constraint handler

Definition at line 17799 of file cons_linear.c.

References SCIP_LinConsUpgrade::active, conshdlrdataHasUpgrade(), conshdlrdataIncludeUpgrade(), FALSE, linconsupgradeCreate(), NULL, SCIP_Bool, SCIP_CALL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIPaddBoolParam(), SCIPconshdlrGetData(), SCIPcreateConsLinear(), SCIPerrorMessage, SCIPsnprintf(), and TRUE.

Referenced by SCIPincludeConshdlrIndicator(), SCIPincludeConshdlrLogicor(), SCIPincludeConshdlrVarbound(), and SCIPincludeConshdlrXor().

◆ SCIPcreateConsLinear()

SCIP_RETCODE SCIPcreateConsLinear ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Real vals,
SCIP_Real  lhs,
SCIP_Real  rhs,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a linear constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of nonzeros in the constraint
varsarray with variables of constraint entries
valsarray with coefficients of constraint entries
lhsleft hand side of constraint
rhsright hand side of constraint
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 17851 of file cons_linear.c.

References consdataCreate(), CONSHDLR_NAME, FALSE, NULL, REALABS, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIP_STAGE_EXITPRESOLVE, SCIPABORT, SCIPcreateCons(), SCIPcreateConsBasicLinear(), SCIPcreateConsLinear(), SCIPduplicateBufferArray, SCIPerrorMessage, SCIPfindConshdlr(), SCIPfreeBufferArray, SCIPgetProbvarLinearSum(), SCIPgetStage(), SCIPinfinity(), SCIPisInfinity(), SCIPreallocBufferArray, SCIPvarIsRelaxationOnly(), and TRUE.

Referenced by addBranchingComplementaritiesSOS1(), addExtendedAsymmetricFormulation(), addExtendedFlowFormulation(), addLocalBranchingConstraint(), addLocalbranchingConstraintAndObjcutoff(), addLocalConss(), addSSTConssOrbitAndUpdateSST(), addStrongSBCsSubgroup(), addTrustRegionConstraints(), addWeakSBCsSubgroup(), aggregation(), applyFixings(), cancelRow(), consdataLinearize(), copyCuts(), CREATE_CONSTRAINT(), createAndAddLinearCons(), createAndAddProofcons(), createConstraint(), createConstraints(), createCoveringProblem(), createLinearCons(), createMipCpFormulation(), createNAryBranch(), createProbOnlyEdge(), createProbSimplified(), createProbSimplifiedTest(), createRows(), createSubSCIP(), createSubscip(), dualPresolve(), execmain(), fixDeleteOrUpgradeCons(), fixVariableZeroNode(), forbidCover(), getFixedVariable(), preprocessConstraintPairs(), propIndicator(), scipexamples::QueensSolver::QueensSolver(), readCnf(), readConstraints(), readOPBFile(), readRows(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSINITPRE(), SCIP_DECL_CONSPRESOL(), SCIP_DECL_READERREAD(), SCIPaddTrustregionNeighborhoodConstraint(), SCIPcopyConsLinear(), SCIPcreateConsIndicatorGeneric(), SCIPcreateConsLinear(), SCIPgetVarCopy(), SCIPincludeLinconsUpgrade(), selectVarMultAggrBranching(), setupAndSolveSubscip(), setupSubproblem(), setupSubScip(), tightenSingleVar(), tryUpgradingLogicor(), tryUpgradingSetppc(), and upgradeLinearSuperindicator().

◆ SCIPcreateConsBasicLinear()

SCIP_RETCODE SCIPcreateConsBasicLinear ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Real vals,
SCIP_Real  lhs,
SCIP_Real  rhs 
)

creates and captures a linear constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsLinear(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsLinear() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of nonzeros in the constraint
varsarray with variables of constraint entries
valsarray with coefficients of constraint entries
lhsleft hand side of constraint
rhsright hand side of constraint

Definition at line 18040 of file cons_linear.c.

Referenced by addLocalBranchingConstraint(), applyRepair(), createAndAddTransferredCut(), createAndApplyStoredBendersCut(), createBlockproblem(), createKKTComplementarityBinary(), createKKTComplementarityBounds(), createKKTComplementarityLinear(), createKKTDualCons(), createMasterproblem(), createMIP(), createMipFormulation(), createOriginalproblem(), createProbSimplified(), createProbSimplifiedTest(), createSubproblem(), createSubproblems(), generateAndApplyBendersCuts(), generateAndApplyBendersIntegerCuts(), generateAndApplyBendersNogoodCut(), getBinaryProductExprDo(), infinityCountUpdate(), main(), AMPLProblemHandler::OnHeader(), readLIBSVM(), reformulateFactorizedBinaryQuadratic(), SCIP_DECL_HEUREXEC(), SCIPapplyProximity(), SCIPbendersMergeSubproblemIntoMaster(), SCIPcreateConsLinear(), SCIPgenerateAndApplyBendersOptCut(), SCIPincludePresolMILP(), SCIPverifyCircularPatternNLP(), setupAndSolveFiniteSolSubscip(), setupProblem(), and solvePricingMINLP().

◆ SCIPcopyConsLinear()

SCIP_RETCODE SCIPcopyConsLinear ( SCIP scip,
SCIP_CONS **  cons,
SCIP sourcescip,
const char *  name,
int  nvars,
SCIP_VAR **  sourcevars,
SCIP_Real sourcecoefs,
SCIP_Real  lhs,
SCIP_Real  rhs,
SCIP_HASHMAP varmap,
SCIP_HASHMAP consmap,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode,
SCIP_Bool  global,
SCIP_Bool valid 
)

creates by copying and captures a linear constraint

Parameters
sciptarget SCIP data structure
conspointer to store the created target constraint
sourcescipsource SCIP data structure
namename of constraint
nvarsnumber of variables in source variable array
sourcevarssource variables of the linear constraints
sourcecoefscoefficient array of the linear constraint, or NULL if all coefficients are one
lhsleft hand side of the linear constraint
rhsright hand side of the linear constraint
varmapa SCIP_HASHMAP mapping variables of the source SCIP to corresponding variables of the target SCIP
consmapa hashmap to store the mapping of source constraints to the corresponding target constraints
initialshould the LP relaxation of constraint be in the initial LP?
separateshould the constraint be separated during LP processing?
enforceshould the constraint be enforced during node processing?
checkshould the constraint be checked for feasibility?
propagateshould the constraint be propagated during node processing?
localis constraint only valid locally?
modifiableis constraint modifiable (subject to column generation)?
dynamicis constraint subject to aging?
removableshould the relaxation be removed from the LP due to aging or cleanup?
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node?
globalcreate a global or a local copy?
validpointer to store if the copying was valid

Definition at line 18060 of file cons_linear.c.

References CONSHDLR_NAME, FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_Real, SCIPaddCoefLinear(), SCIPallocBufferArray, SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPcreateConsLinear(), SCIPduplicateBufferArray, SCIPerrorMessage, SCIPfreeBufferArray, SCIPgetProbvarLinearSum(), SCIPgetVarCopy(), SCIPisGT(), SCIPisInfinity(), SCIPreallocBufferArray, SCIPvarGetOrigvarSum(), SCIPvarIsOriginal(), SCIPvarIsRelaxationOnly(), and TRUE.

Referenced by SCIP_DECL_CONSCOPY().

◆ SCIPaddCoefLinear()

SCIP_RETCODE SCIPaddCoefLinear ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var,
SCIP_Real  val 
)

adds coefficient to linear constraint (if it is not zero)

Parameters
scipSCIP data structure
consconstraint data
varvariable of constraint entry
valcoefficient of constraint entry

Definition at line 18192 of file cons_linear.c.

References addCoef(), chgLhs(), chgRhs(), CONSHDLR_NAME, NULL, REALABS, SCIP_Bool, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_Real, SCIPABORT, SCIPallocBufferArray, SCIPchgCoefLinear(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconsGetName(), SCIPconshdlrGetName(), SCIPerrorMessage, SCIPfreeBufferArray, SCIPgetProbvarLinearSum(), SCIPinfinity(), SCIPisInfinity(), SCIPreallocBufferArray, SCIPvarGetName(), and TRUE.

Referenced by ObjPricerVRP::add_tour_variable(), addAuxiliaryVariableToCut(), addCoefTerm(), AMPLProblemHandler::LinearPartHandler::AddTerm(), addVariable(), applyFixings(), applyRepair(), computeNogoodCut(), computeStandardIntegerOptCut(), consdataLinearize(), createAndAddLinearCons(), createAndAddProofcons(), createAndAddTransferredCut(), createConstraint(), createKKTComplementarityBinary(), createKKTComplementarityBounds(), createKKTComplementarityLinear(), createKKTDualCons(), createMasterproblem(), createMIP(), createMipCpFormulation(), createMipFormulation(), createOriginalproblem(), createProbOnlyEdge(), createProbSimplified(), createProbSimplifiedTest(), createSubproblem(), createSubproblems(), createSubSCIP(), execmain(), getBoundConsFromVertices(), main(), presolveAddKKTLinearCons(), presolveAddKKTQuadBilinearTerms(), presolveAddKKTQuadLinearTerms(), presolveAddKKTQuadQuadraticTerms(), scipexamples::QueensSolver::QueensSolver(), readCols(), readIndicators(), reformulateFactorizedBinaryQuadratic(), SCIP_DECL_CONSINITPRE(), SCIP_DECL_READERREAD(), SCIPaddCoefPseudoboolean(), SCIPaddVarIndicator(), SCIPapplyProximity(), SCIPbendersMergeSubproblemIntoMaster(), SCIPchgCoefLinear(), SCIPconsAddCoef(), SCIPcopyConsLinear(), SCIPcreateConsIndicatorGeneric(), SCIPgenerateAndApplyBendersOptCut(), SCIPgetVarCopy(), SCIPverifyCircularPatternNLP(), setupAndSolveFiniteSolSubscip(), setupAndSolveSubscip(), setupProblem(), setupSubproblem(), setupSubScip(), solvePricingMINLP(), tightenSingleVar(), tryUpgradingLogicor(), and tryUpgradingSetppc().

◆ SCIPchgCoefLinear()

SCIP_RETCODE SCIPchgCoefLinear ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var,
SCIP_Real  val 
)

changes coefficient of variable in linear constraint; deletes the variable if coefficient is zero; adds variable if not yet contained in the constraint

Note
This method may only be called during problem creation stage for an original constraint and variable.
This method requires linear time to search for occurences of the variable in the constraint data.
Parameters
scipSCIP data structure
consconstraint data
varvariable of constraint entry
valnew coefficient of constraint entry

Definition at line 18353 of file cons_linear.c.

References chgCoefPos(), delCoefPos(), FALSE, NULL, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_Real, SCIPaddCoefLinear(), SCIPchgCoefLinear(), SCIPconsGetData(), SCIPdelCoefLinear(), SCIPerrorMessage, SCIPgetLhsLinear(), SCIPisZero(), and TRUE.

Referenced by addScenarioVarsAndConsToProb(), SCIPaddCoefLinear(), and SCIPchgCoefLinear().

◆ SCIPdelCoefLinear()

SCIP_RETCODE SCIPdelCoefLinear ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var 
)

deletes variable from linear constraint

Note
This method may only be called during problem creation stage for an original constraint and variable.
This method requires linear time to search for occurences of the variable in the constraint data.
Parameters
scipSCIP data structure
consconstraint data
varvariable of constraint entry

Definition at line 18421 of file cons_linear.c.

References CONSHDLR_NAME, NULL, SCIP_INVALID, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by SCIPchgCoefLinear().

◆ SCIPgetLhsLinear()

◆ SCIPgetRhsLinear()

◆ SCIPchgLhsLinear()

◆ SCIPchgRhsLinear()

◆ SCIPgetNVarsLinear()

◆ SCIPgetVarsLinear()

◆ SCIPgetValsLinear()

◆ SCIPgetActivityLinear()

SCIP_Real SCIPgetActivityLinear ( SCIP scip,
SCIP_CONS cons,
SCIP_SOL sol 
)

gets the activity of the linear constraint in the given solution

Note
if the solution contains values at infinity, this method will return SCIP_INVALID in case the activity comprises positive and negative infinity contributions
Parameters
scipSCIP data structure
consconstraint data
solsolution, or NULL to use current node's solution

Definition at line 18600 of file cons_linear.c.

Referenced by computeNogoodCut(), computeStandardIntegerOptCut(), generateAndApplyBendersCuts(), reuseSolution(), and SCIPgenerateAndApplyBendersOptCut().

◆ SCIPgetFeasibilityLinear()

SCIP_Real SCIPgetFeasibilityLinear ( SCIP scip,
SCIP_CONS cons,
SCIP_SOL sol 
)

gets the feasibility of the linear constraint in the given solution

Parameters
scipSCIP data structure
consconstraint data
solsolution, or NULL to use current node's solution

Definition at line 18628 of file cons_linear.c.

◆ SCIPgetDualsolLinear()

SCIP_Real SCIPgetDualsolLinear ( SCIP scip,
SCIP_CONS cons 
)

gets the dual solution of the linear constraint in the current LP

Parameters
scipSCIP data structure
consconstraint data

Definition at line 18656 of file cons_linear.c.

Referenced by ObjPricerVRP::pricing(), SCIP_DECL_EVENTEXEC(), SCIP_DECL_PRICERREDCOST(), SCIPconsGetDualsol(), SCIPgetDualSolVal(), and SCIPwriteSolutionNl().

◆ SCIPgetDualfarkasLinear()

SCIP_Real SCIPgetDualfarkasLinear ( SCIP scip,
SCIP_CONS cons 
)

gets the dual Farkas value of the linear constraint in the current infeasible LP

Parameters
scipSCIP data structure
consconstraint data

Definition at line 18684 of file cons_linear.c.

Referenced by ObjPricerVRP::pricing(), and SCIPconsGetDualfarkas().

◆ SCIPgetRowLinear()

SCIP_ROW* SCIPgetRowLinear ( SCIP scip,
SCIP_CONS cons 
)

returns the linear relaxation of the given linear constraint; may return NULL if no LP row was yet created; the user must not modify the row!

Parameters
scipSCIP data structure
consconstraint data

Definition at line 18714 of file cons_linear.c.

References SCIP_Bool, and SCIP_Real.

Referenced by SCIPconsGetRow().

◆ SCIPupgradeConsLinear()

SCIP_RETCODE SCIPupgradeConsLinear ( SCIP scip,
SCIP_CONS cons,
SCIP_CONS **  upgdcons 
)

tries to automatically convert a linear constraint into a more specific and more specialized constraint

Parameters
scipSCIP data structure
conssource constraint to try to convert
upgdconspointer to store upgraded constraint, or NULL if not successful

Definition at line 18738 of file cons_linear.c.

Referenced by createAndAddProofcons().

◆ SCIPclassifyConstraintTypesLinear()

SCIP_RETCODE SCIPclassifyConstraintTypesLinear ( SCIP scip,
SCIP_LINCONSSTATS linconsstats 
)

performs linear constraint type classification as used for MIPLIB

iterates through all linear constraints and stores relevant statistics in the linear constraint statistics linconsstats.

Note
only constraints are iterated that belong to the linear constraint handler. If the problem has been presolved already, constraints that were upgraded to more special types such as, e.g., varbound constraints, will not be shown correctly anymore. Similarly, if specialized constraints were created through the API, these are currently not present.
Parameters
scipSCIP data structure
linconsstatslinear constraint type classification

Definition at line 15361 of file cons_linear.c.

References b, FALSE, isFiniteNonnegativeIntegral(), isRangedRow(), mergeMultiples(), NULL, REALABS, SCIP_Bool, SCIP_CALL, SCIP_DECL_CONSEXITPRE(), SCIP_LINCONSTYPE_AGGREGATION, SCIP_LINCONSTYPE_BINPACKING, SCIP_LINCONSTYPE_CARDINALITY, SCIP_LINCONSTYPE_EMPTY, SCIP_LINCONSTYPE_EQKNAPSACK, SCIP_LINCONSTYPE_FREE, SCIP_LINCONSTYPE_GENERAL, SCIP_LINCONSTYPE_INTKNAPSACK, SCIP_LINCONSTYPE_INVKNAPSACK, SCIP_LINCONSTYPE_KNAPSACK, SCIP_LINCONSTYPE_MIXEDBINARY, SCIP_LINCONSTYPE_PRECEDENCE, SCIP_LINCONSTYPE_SETCOVERING, SCIP_LINCONSTYPE_SETPACKING, SCIP_LINCONSTYPE_SETPARTITION, SCIP_LINCONSTYPE_SINGLETON, SCIP_LINCONSTYPE_VARBOUND, SCIP_OKAY, SCIP_Real, SCIP_VARTYPE_CONTINUOUS, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetConss(), SCIPconshdlrGetData(), SCIPconshdlrGetNConss(), SCIPdebugMsg, SCIPdebugPrintCons, SCIPinfinity(), SCIPisEQ(), SCIPisGE(), SCIPisInfinity(), SCIPisIntegral(), SCIPisLE(), SCIPisNegative(), SCIPisZero(), SCIPlinConsStatsIncTypeCount(), SCIPlinConsStatsReset(), SCIPvarGetLbGlobal(), SCIPvarGetType(), SCIPvarGetUbGlobal(), and TRUE.

Referenced by SCIP_DECL_DIALOGEXEC().

◆ SCIPcleanupConssLinear()

SCIP_RETCODE SCIPcleanupConssLinear ( SCIP scip,
SCIP_Bool  onlychecked,
SCIP_Bool infeasible 
)

cleans up (multi-)aggregations and fixings from linear constraints

Parameters
scipSCIP data structure
onlycheckedshould only checked constraints be cleaned up?
infeasiblepointer to return whether the problem was detected to be infeasible

Definition at line 18978 of file cons_linear.c.

References applyFixings(), SCIP_CALL, and SCIP_OKAY.

Referenced by SCIPmatrixCreate().

◆ SCIPcreateConsLinking()

SCIP_RETCODE SCIPcreateConsLinking ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR linkvar,
SCIP_VAR **  binvars,
SCIP_Real vals,
int  nbinvars,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a linking constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
linkvarlinking variable (continuous or integer) which should be linked
binvarsbinary variables
valscoefficients of the binary variables
nbinvarsnumber of binary starting variables
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 3486 of file cons_linking.c.

References consdataCreate(), consdataCreateBinvars(), CONSHDLR_NAME, getHashmapKey(), HASHSIZE_BINVARSCONS, NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPblkmem(), SCIPconshdlrGetData(), SCIPcreateCons(), SCIPdebugMsg, SCIPerrorMessage, SCIPfindConshdlr(), SCIPgetStage(), SCIPhashmapCreate(), SCIPhashmapExists(), SCIPhashmapInsert(), SCIPisInfinity(), SCIPvarGetLbGlobal(), SCIPvarGetName(), and SCIPvarGetUbGlobal().

Referenced by consdataCollectLinkingCons(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSPARSE(), and SCIPcreateConsBasicLinking().

◆ SCIPcreateConsBasicLinking()

SCIP_RETCODE SCIPcreateConsBasicLinking ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR linkvar,
SCIP_VAR **  binvars,
SCIP_Real vals,
int  nbinvars 
)

creates and captures a linking constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsLinking(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsLinking() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a linking constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsLinking(); all flags can be set via SCIPsetCons<Flagname>-methods in scip.h

See also
SCIPcreateConsLinking() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
linkvarlinking variable (continuous or integer) which should be linked
binvarsbinary variables, or NULL
valscoefficients of the binary variables
nbinvarsnumber of binary variables

Definition at line 3583 of file cons_linking.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPcreateConsLinking(), and TRUE.

◆ SCIPexistsConsLinking()

SCIP_Bool SCIPexistsConsLinking ( SCIP scip,
SCIP_VAR linkvar 
)

checks if for the given linking variable (continuous or integer) a linking constraint exists

Parameters
scipSCIP data structure
linkvarlinking variable (continuous or integer) which should be linked

Definition at line 3602 of file cons_linking.c.

References CONSHDLR_NAME, getHashmapKey(), NULL, SCIPconshdlrGetData(), SCIPfindConshdlr(), and SCIPhashmapExists().

Referenced by collectBinaryVars(), and consdataCollectLinkingCons().

◆ SCIPgetConsLinking()

SCIP_CONS* SCIPgetConsLinking ( SCIP scip,
SCIP_VAR linkvar 
)

returns the linking constraint belonging the given linking variable (continuous or integer) or NULL if it does not exist yet

Parameters
scipSCIP data structure
linkvarlinking variable (continuous or integer) which should be linked

Definition at line 3620 of file cons_linking.c.

References CONSHDLR_NAME, getHashmapKey(), NULL, SCIPconshdlrGetData(), SCIPfindConshdlr(), and SCIPhashmapGetImage().

Referenced by collectBinaryVars(), consdataCollectLinkingCons(), and consdataCreate().

◆ SCIPgetLinkvarLinking()

SCIP_VAR* SCIPgetLinkvarLinking ( SCIP scip,
SCIP_CONS cons 
)

returns the linking variable (continuous or integer) of the linking constraint

Parameters
scipSCIP data structure
conslinking constraint

Definition at line 3641 of file cons_linking.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by computeSymmetryGroup().

◆ SCIPgetBinvarsLinking()

SCIP_RETCODE SCIPgetBinvarsLinking ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR ***  binvars,
int *  nbinvars 
)

returns the binary variables of the linking constraint

Parameters
scipSCIP data structure
conslinking constraint
binvarspointer to store the binary variables array pointer
nbinvarspointer to store the number of returned binary variables

Definition at line 3664 of file cons_linking.c.

References consdataCreateBinvars(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetData(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by collectBinaryVars(), computeSymmetryGroup(), createCoverCutsTimepoint(), and SCIPmatrixCreate().

◆ SCIPgetNBinvarsLinking()

int SCIPgetNBinvarsLinking ( SCIP scip,
SCIP_CONS cons 
)

returns the number of binary variables of the linking constraint

Parameters
scipSCIP data structure
conslinking constraint

Definition at line 3710 of file cons_linking.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

◆ SCIPgetValsLinking()

SCIP_Real* SCIPgetValsLinking ( SCIP scip,
SCIP_CONS cons 
)

returns the coefficients of the binary variables

Parameters
scipSCIP data structure
conslinking constraint

Definition at line 3733 of file cons_linking.c.

References consdataSort(), CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by collectBinaryVars(), computeSymmetryGroup(), createCoverCutsTimepoint(), and SCIPmatrixCreate().

◆ SCIPgetBinvarsDataLinking()

SCIP_RETCODE SCIPgetBinvarsDataLinking ( SCIP_CONS cons,
SCIP_VAR ***  binvars,
SCIP_Real **  vals,
int *  nbinvars 
)

return all binary variable information of the linking constraint

Parameters
conslinking constraint
binvarspointer to store binary variables, or NULL
valspointer to store the binary coefficients, or NULL
nbinvarspointer to store the number of binary variables, or NULL

Definition at line 3757 of file cons_linking.c.

References consdataSort(), CONSHDLR_NAME, NULL, SCIP_ERROR, SCIP_OKAY, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

◆ SCIPcreateConsLogicor()

SCIP_RETCODE SCIPcreateConsLogicor ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a logic or constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsarray with variables of constraint entries
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 5307 of file cons_logicor.c.

References consdataCreate(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_EVENTTYPE_VARFIXED, SCIP_INVALIDCALL, SCIP_OKAY, SCIP_STAGE_PRESOLVING, SCIPcatchVarEvent(), SCIPconshdlrGetData(), SCIPcreateCons(), SCIPcreateConsBasicLogicor(), SCIPerrorMessage, SCIPfindConshdlr(), SCIPgetStage(), and SCIPisTransformed().

Referenced by addSplitcons(), applyCliqueFixings(), BENDERS_CUTORACLE(), consdataLinearize(), createAndAddLinearCons(), createConflict(), createConflictCons(), createNormalizedLogicor(), extendToCover(), readCnf(), SCIP_DECL_CONFLICTEXEC(), SCIPcreateConsBasicLogicor(), SCIPincludeConshdlrLogicor(), SCIPreoptApplyGlbConss(), and upgradeCons().

◆ SCIPcreateConsBasicLogicor()

SCIP_RETCODE SCIPcreateConsBasicLogicor ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars 
)

creates and captures a logicor constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsLogicor(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsLogicor() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsarray with variables of constraint entries

Definition at line 5384 of file cons_logicor.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPaddCoefLogicor(), SCIPcreateConsLogicor(), and TRUE.

Referenced by addFixedVarsConss(), createProbQP(), createProbSimplified(), createProbSimplifiedTest(), and SCIPcreateConsLogicor().

◆ SCIPaddCoefLogicor()

SCIP_RETCODE SCIPaddCoefLogicor ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var 
)

adds coefficient in logic or constraint

Parameters
scipSCIP data structure
conslogicor constraint
varvariable to add to the constraint

Definition at line 5401 of file cons_logicor.c.

References addCoef(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetNVarsLogicor().

Referenced by addCoefTerm(), createConflictCons(), createProbQP(), createProbSimplified(), createProbSimplifiedTest(), SCIPaddCoefPseudoboolean(), SCIPconsAddCoef(), and SCIPcreateConsBasicLogicor().

◆ SCIPgetNVarsLogicor()

◆ SCIPgetVarsLogicor()

◆ SCIPgetDualsolLogicor()

SCIP_Real SCIPgetDualsolLogicor ( SCIP scip,
SCIP_CONS cons 
)

gets the dual solution of the logic or constraint in the current LP

Parameters
scipSCIP data structure
consconstraint data

Definition at line 5470 of file cons_logicor.c.

References CONSHDLR_NAME, NULL, SCIP_INVALID, SCIP_Real, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, SCIPgetDualfarkasLogicor(), and SCIProwGetDualsol().

Referenced by SCIPconsGetDualsol(), and SCIPgetVarsLogicor().

◆ SCIPgetDualfarkasLogicor()

SCIP_Real SCIPgetDualfarkasLogicor ( SCIP scip,
SCIP_CONS cons 
)

gets the dual Farkas value of the logic or constraint in the current infeasible LP

Parameters
scipSCIP data structure
consconstraint data

Definition at line 5496 of file cons_logicor.c.

References CONSHDLR_NAME, NULL, SCIP_INVALID, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, SCIPgetRowLogicor(), and SCIProwGetDualfarkas().

Referenced by SCIPconsGetDualfarkas(), and SCIPgetDualsolLogicor().

◆ SCIPgetRowLogicor()

SCIP_ROW* SCIPgetRowLogicor ( SCIP scip,
SCIP_CONS cons 
)

returns the linear relaxation of the given logic or constraint; may return NULL if no LP row was yet created; the user must not modify the row!

Parameters
scipSCIP data structure
consconstraint data

Definition at line 5524 of file cons_logicor.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPcleanupConssLogicor(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by SCIPconsGetRow(), and SCIPgetDualfarkasLogicor().

◆ SCIPcleanupConssLogicor()

SCIP_RETCODE SCIPcleanupConssLogicor ( SCIP scip,
SCIP_Bool  onlychecked,
int *  naddconss,
int *  ndelconss,
int *  nchgcoefs 
)

cleans up (multi-)aggregations and fixings from logicor constraints

Parameters
scipSCIP data structure
onlycheckedshould only checked constraints be cleaned up?
naddconsspointer to count number of added (linear) constraints
ndelconsspointer to count number of deleted (logicor) constraints
nchgcoefspointer to count number of changed coefficients

Definition at line 5547 of file cons_logicor.c.

References applyFixings(), CONSHDLR_NAME, FALSE, mergeMultiples(), NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPallocBufferArray, SCIPconshdlrGetCheckConss(), SCIPconshdlrGetConss(), SCIPconshdlrGetData(), SCIPconshdlrGetNActiveConss(), SCIPconshdlrGetNCheckConss(), SCIPconsIsDeleted(), SCIPdelCons(), SCIPfindConshdlr(), SCIPfreeBufferArray, SCIPgetNContVars(), and SCIPgetNVars().

Referenced by SCIPgetRowLogicor(), and SCIPmatrixCreate().

◆ SCIPincludeConsUpgradeNonlinear()

SCIP_RETCODE SCIPincludeConsUpgradeNonlinear ( SCIP scip,
SCIP_DECL_NONLINCONSUPGD((*nlconsupgd))  ,
int  priority,
SCIP_Bool  active,
const char *  conshdlrname 
)

includes a nonlinear constraint upgrade method into the nonlinear constraint handler

Parameters
scipSCIP data structure
prioritypriority of upgrading method
activeshould the upgrading method by active by default?
conshdlrnamename of the constraint handler

Definition at line 11074 of file cons_nonlinear.c.

References active, CONSUPGRADE::active, CONSHDLR_NAME, FALSE, NULL, paramname, CONSUPGRADE::priority, SCIP_CALL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPaddBoolParam(), SCIPallocBlockMemory, SCIPconshdlrGetData(), SCIPcreateConsNonlinear(), SCIPensureBlockMemoryArray, SCIPerrorMessage, SCIPfindConshdlr(), SCIPsnprintf(), and SCIPwarningMessage().

Referenced by SCIPincludeConshdlrNonlinear().

◆ SCIPcreateConsNonlinear()

SCIP_RETCODE SCIPcreateConsNonlinear ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_EXPR expr,
SCIP_Real  lhs,
SCIP_Real  rhs,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable 
)

creates and captures a nonlinear constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
exprexpression of constraint (must not be NULL)
lhsleft hand side of constraint
rhsright hand side of constraint
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.

Definition at line 11145 of file cons_nonlinear.c.

References CONSHDLR_NAME, createCons(), NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPcreateConsBasicNonlinear(), SCIPerrorMessage, SCIPfindConshdlr(), and TRUE.

Referenced by createConstraint(), readConstraints(), readObjective(), SCIPcreateConsBasicNonlinear(), SCIPcreateConsSOC(), and SCIPincludeConsUpgradeNonlinear().

◆ SCIPcreateConsBasicNonlinear()

SCIP_RETCODE SCIPcreateConsBasicNonlinear ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_EXPR expr,
SCIP_Real  lhs,
SCIP_Real  rhs 
)

creates and captures a nonlinear constraint with all its constraint flags set to their default values

All flags can be set via SCIPconsSetFLAGNAME-methods.

See also
SCIPcreateConsNonlinear() for information about the basic constraint flag configuration.
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
exprexpression of constraint (must not be NULL)
lhsleft hand side of constraint
rhsright hand side of constraint

Definition at line 11200 of file cons_nonlinear.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcreateConsNonlinear(), SCIPcreateConsQuadraticNonlinear(), and TRUE.

Referenced by AMPLProblemHandler::EndInput(), AMPLProblemHandler::OnHeader(), SCIPcreateConsBasicSignpowerNonlinear(), SCIPcreateConsBasicSOC(), SCIPcreateConsBasicSOCNonlinear(), SCIPcreateConsNonlinear(), and setupProblem().

◆ SCIPcreateConsQuadraticNonlinear()

SCIP_RETCODE SCIPcreateConsQuadraticNonlinear ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nlinvars,
SCIP_VAR **  linvars,
SCIP_Real lincoefs,
int  nquadterms,
SCIP_VAR **  quadvars1,
SCIP_VAR **  quadvars2,
SCIP_Real quadcoefs,
SCIP_Real  lhs,
SCIP_Real  rhs,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable 
)

creates and captures a quadratic nonlinear constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nlinvarsnumber of linear terms
linvarsarray with variables in linear part
lincoefsarray with coefficients of variables in linear part
nquadtermsnumber of quadratic terms
quadvars1array with first variables in quadratic terms
quadvars2array with second variables in quadratic terms
quadcoefsarray with coefficients of quadratic terms
lhsleft hand side of quadratic equation
rhsright hand side of quadratic equation
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.

Definition at line 11219 of file cons_nonlinear.c.

References CONSHDLR_NAME, createCons(), FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPcreateConsBasicQuadraticNonlinear(), SCIPcreateExprQuadratic(), SCIPerrorMessage, SCIPfindConshdlr(), and SCIPreleaseExpr().

Referenced by createOriginalproblem(), createProbQP(), createQuadraticCons(), createSubproblems(), readConstraints(), readObjective(), readQCMatrix(), readQMatrix(), SCIPcreateConsBasicNonlinear(), SCIPcreateConsBasicQuadraticNonlinear(), SCIPcreateConsIndicatorGeneric(), SCIPcreateConsIndicatorGenericLinCons(), SCIPcreateConsQuadratic(), SCIPverifyCircularPatternNLP(), setupProblem(), and solvePricingMINLP().

◆ SCIPcreateConsBasicQuadraticNonlinear()

SCIP_RETCODE SCIPcreateConsBasicQuadraticNonlinear ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nlinvars,
SCIP_VAR **  linvars,
SCIP_Real lincoefs,
int  nquadterms,
SCIP_VAR **  quadvars1,
SCIP_VAR **  quadvars2,
SCIP_Real quadcoefs,
SCIP_Real  lhs,
SCIP_Real  rhs 
)

creates and captures a quadratic nonlinear constraint with all its constraint flags set to their default values

All flags can be set via SCIPconsSetFLAGNAME-methods.

See also
SCIPcreateConsQuadraticNonlinear() for information about the basic constraint flag configuration.
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nlinvarsnumber of linear terms
linvarsarray with variables in linear part
lincoefsarray with coefficients of variables in linear part
nquadtermsnumber of quadratic terms
quadvars1array with first variables in quadratic terms
quadvars2array with second variables in quadratic terms
quadcoefsarray with coefficients of quadratic terms
lhsleft hand side of quadratic equation
rhsright hand side of quadratic equation

Definition at line 11290 of file cons_nonlinear.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcreateConsBasicSOCNonlinear(), SCIPcreateConsQuadraticNonlinear(), and TRUE.

Referenced by SCIPcreateConsBasicQuadratic(), and SCIPcreateConsQuadraticNonlinear().

◆ SCIPcreateConsBasicSOCNonlinear()

SCIP_RETCODE SCIPcreateConsBasicSOCNonlinear ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Real coefs,
SCIP_Real offsets,
SCIP_Real  constant,
SCIP_VAR rhsvar,
SCIP_Real  rhscoeff,
SCIP_Real  rhsoffset 
)

creates and captures a nonlinear constraint that is a second-order cone constraint with all its constraint flags set to their default values

\(\sqrt{\gamma + \sum_{i=1}^{n} (\alpha_i\, (x_i + \beta_i))^2} \leq \alpha_{n+1}\, (x_{n+1}+\beta_{n+1})\)

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables on left hand side of constraint (n)
varsarray with variables on left hand side (x_i)
coefsarray with coefficients of left hand side variables (alpha_i), or NULL if all 1.0
offsetsarray with offsets of variables (beta_i), or NULL if all 0.0
constantconstant on left hand side (gamma)
rhsvarvariable on right hand side of constraint (x_{n+1})
rhscoeffcoefficient of variable on right hand side (alpha_{n+1})
rhsoffsetoffset of variable on right hand side (beta_{n+1})

Definition at line 11317 of file cons_nonlinear.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPappendExprSumExpr(), SCIPcreateConsBasicNonlinear(), SCIPcreateConsBasicSignpowerNonlinear(), SCIPcreateExprPow(), SCIPcreateExprSum(), SCIPcreateExprVar(), SCIPinfinity(), and SCIPreleaseExpr().

Referenced by SCIPcreateConsBasicQuadraticNonlinear().

◆ SCIPcreateConsBasicSignpowerNonlinear()

SCIP_RETCODE SCIPcreateConsBasicSignpowerNonlinear ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR x,
SCIP_VAR z,
SCIP_Real  exponent,
SCIP_Real  xoffset,
SCIP_Real  zcoef,
SCIP_Real  lhs,
SCIP_Real  rhs 
)

creates and captures a signpower nonlinear constraint with all its constraint flags set to their default values

\(\textrm{lhs} \leq \textrm{sign}(x+a) |x+a|^n + c z \leq \textrm{rhs}\)

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
xnonlinear variable x in constraint
zlinear variable z in constraint
exponentexponent n of |x+offset|^n term in constraint
xoffsetoffset in |x+offset|^n term in constraint
zcoefcoefficient of z in constraint
lhsleft hand side of constraint
rhsright hand side of constraint

Definition at line 11388 of file cons_nonlinear.c.

References NULL, SCIP_CALL, SCIP_Longint, SCIP_OKAY, SCIP_Real, SCIPcreateConsBasicNonlinear(), SCIPcreateExprSignpower(), SCIPcreateExprSum(), SCIPcreateExprVar(), SCIPgetCurBoundsTagNonlinear(), and SCIPreleaseExpr().

Referenced by SCIPcreateConsAbspower(), SCIPcreateConsBasicAbspower(), and SCIPcreateConsBasicSOCNonlinear().

◆ SCIPgetCurBoundsTagNonlinear()

SCIP_Longint SCIPgetCurBoundsTagNonlinear ( SCIP_CONSHDLR conshdlr)

gets tag indicating current local variable bounds

Parameters
conshdlrnonlinear constraint handler

Definition at line 11439 of file cons_nonlinear.c.

References NULL, SCIP_Longint, SCIPconshdlrGetData(), and SCIPgetLastBoundRelaxTagNonlinear().

Referenced by SCIP_DECL_NLHDLRINTEVAL(), and SCIPcreateConsBasicSignpowerNonlinear().

◆ SCIPgetLastBoundRelaxTagNonlinear()

SCIP_Longint SCIPgetLastBoundRelaxTagNonlinear ( SCIP_CONSHDLR conshdlr)

gets the curboundstag from the last time where variable bounds were relaxed

Parameters
conshdlrnonlinear constraint handler

Definition at line 11452 of file cons_nonlinear.c.

References NULL, SCIPconshdlrGetData(), and SCIPincrementCurBoundsTagNonlinear().

Referenced by SCIPgetCurBoundsTagNonlinear().

◆ SCIPincrementCurBoundsTagNonlinear()

void SCIPincrementCurBoundsTagNonlinear ( SCIP_CONSHDLR conshdlr,
SCIP_Bool  boundrelax 
)

increments curboundstag and resets lastboundrelax in constraint handler data

Attention
This method is not intended for normal use. These tags are maintained by the event handler for variable bound change events. This method is used by some unittests.
Parameters
conshdlrnonlinear constraint handler
boundrelaxindicates whether a bound was relaxed, i.e., lastboundrelax should be set too

Definition at line 11470 of file cons_nonlinear.c.

References NULL, SCIPconshdlrGetData(), and SCIPgetVarExprHashmapNonlinear().

Referenced by detectNlhdlrs(), SCIPgetLastBoundRelaxTagNonlinear(), and SCIPmarkExprPropagateNonlinear().

◆ SCIPgetVarExprHashmapNonlinear()

SCIP_HASHMAP* SCIPgetVarExprHashmapNonlinear ( SCIP_CONSHDLR conshdlr)

returns the hashmap that is internally used to map variables to their corresponding variable expressions

Parameters
conshdlrnonlinear constraint handler

Definition at line 11488 of file cons_nonlinear.c.

References NULL, SCIPconshdlrGetData(), and SCIPprocessRowprepNonlinear().

Referenced by SCIPincrementCurBoundsTagNonlinear().

◆ SCIPprocessRowprepNonlinear()

SCIP_RETCODE SCIPprocessRowprepNonlinear ( SCIP scip,
SCIP_NLHDLR nlhdlr,
SCIP_CONS cons,
SCIP_EXPR expr,
SCIP_ROWPREP rowprep,
SCIP_Bool  overestimate,
SCIP_VAR auxvar,
SCIP_Real  auxvalue,
SCIP_Bool  allowweakcuts,
SCIP_Bool  branchscoresuccess,
SCIP_Bool  inenforcement,
SCIP_SOL sol,
SCIP_RESULT result 
)

processes a rowprep for cut addition and maybe report branchscores

Parameters
scipSCIP data structure
nlhdlrnonlinear handler which provided the estimator
consnonlinear constraint
exprexpression
rowprepcut to be added
overestimatewhether the expression needs to be over- or underestimated
auxvarauxiliary variable
auxvaluecurrent value of expression w.r.t. auxiliary variables as obtained from EVALAUX
allowweakcutswhether we should only look for "strong" cuts, or anything that separates is fine
branchscoresuccesswhether the estimator generation generated branching scores
inenforcementwhether we are in enforcement, or only in separation
solsolution to be separated (NULL for the LP solution)
resultpointer to store the result

Definition at line 11498 of file cons_nonlinear.c.

References addExprViolScoresAuxVars(), ENFOLOG, FALSE, getExprAbsAuxViolation(), NULL, REALABS, SCIP_Bool, SCIP_BRANCHED, SCIP_CALL, SCIP_CUTOFF, SCIP_INVALID, SCIP_OKAY, SCIP_Real, SCIP_SEPARATED, SCIPaddRow(), SCIPassumeConvexNonlinear(), SCIPcleanupRowprep(), SCIPcleanupRowprep2(), SCIPconsGetHdlr(), SCIPconshdlrGetData(), SCIPfeastol(), SCIPgetCutEfficacy(), SCIPgetExprRelAuxViolationNonlinear(), SCIPgetLPFeastol(), SCIPgetRowprepRowCons(), SCIPgetRowprepViolation(), SCIPgetSepaMinEfficacy(), SCIPgetSolVal(), SCIPinfoMessage(), SCIPisCutApplicable(), SCIPisCutEfficacious(), SCIPisEQ(), SCIPmarkRowNotRemovableLocal(), SCIPnlhdlrGetName(), SCIPnlhdlrIncrementNCutoffs, SCIPnlhdlrIncrementNSeparated, SCIPprintRow(), SCIPprintRowprep(), SCIPreleaseRow(), SCIProwprepGetCoefs(), SCIProwprepGetModifiedVars(), SCIProwprepGetName(), SCIProwprepGetNModifiedVars(), SCIProwprepGetNVars(), SCIProwprepGetVars(), SCIProwprepRecordModifications(), SCIPsnprintf(), and TRUE.

Referenced by enforceExprNlhdlr(), SCIP_DECL_NLHDLRENFO(), and SCIPgetVarExprHashmapNonlinear().

◆ SCIPassumeConvexNonlinear()

SCIP_Bool SCIPassumeConvexNonlinear ( SCIP_CONSHDLR conshdlr)

returns whether all nonlinear constraints are assumed to be convex

Definition at line 11768 of file cons_nonlinear.c.

References NULL, SCIPcollectBilinTermsNonlinear(), and SCIPconshdlrGetData().

Referenced by SCIP_DECL_NLHDLRDETECT(), and SCIPprocessRowprepNonlinear().

◆ SCIPcollectBilinTermsNonlinear()

SCIP_RETCODE SCIPcollectBilinTermsNonlinear ( SCIP scip,
SCIP_CONSHDLR conshdlr,
SCIP_CONS **  conss,
int  nconss 
)

collects all bilinear terms for a given set of constraints

Attention
This method should only be used for unit tests that depend on SCIPgetBilinTermsNonlinear(), SCIPgetBilinTermNonlinear() or SCIPgetBilinTermIdxNonlinear().
Parameters
scipSCIP data structure
conshdlrnonlinear constraint handler
conssnonlinear constraints
nconsstotal number of nonlinear constraints

Definition at line 11787 of file cons_nonlinear.c.

References bilinearTermsInsertAll(), NULL, SCIP_CALL, SCIP_OKAY, and SCIPgetNBilinTermsNonlinear().

Referenced by SCIPassumeConvexNonlinear().

◆ SCIPgetNBilinTermsNonlinear()

int SCIPgetNBilinTermsNonlinear ( SCIP_CONSHDLR conshdlr)

returns the total number of bilinear terms that are contained in all nonlinear constraints

Note
This method should only be used after auxiliary variables have been created, i.e., after CONSINITLP.
Parameters
conshdlrnonlinear constraint handler

Definition at line 11806 of file cons_nonlinear.c.

References NULL, SCIPconshdlrGetData(), and SCIPgetBilinTermsNonlinear().

Referenced by createSepaData(), getBestEstimators(), markRowsXj(), SCIPcollectBilinTermsNonlinear(), and separateMcCormickImplicit().

◆ SCIPgetBilinTermsNonlinear()

SCIP_CONSNONLINEAR_BILINTERM* SCIPgetBilinTermsNonlinear ( SCIP_CONSHDLR conshdlr)

returns all bilinear terms that are contained in all nonlinear constraints

Note
This method should only be used after auxiliary variables have been created, i.e., after CONSINITLP.
The value of the auxiliary variable of a bilinear term might be NULL, which indicates that the term does not have an auxiliary variable.
Parameters
conshdlrnonlinear constraint handler

Definition at line 11825 of file cons_nonlinear.c.

References NULL, SCIPconshdlrGetData(), and SCIPgetBilinTermIdxNonlinear().

Referenced by addRltTerm(), createSepaData(), getBestEstimators(), isAcceptableRow(), markRowsXj(), SCIPgetNBilinTermsNonlinear(), and separateMcCormickImplicit().

◆ SCIPgetBilinTermIdxNonlinear()

int SCIPgetBilinTermIdxNonlinear ( SCIP_CONSHDLR conshdlr,
SCIP_VAR x,
SCIP_VAR y 
)

returns the index of the bilinear term representing the product of the two given variables

Note
The method should only be used after auxiliary variables have been created, i.e., after CONSINITLP.
Returns
The method returns -1 if the variables do not appear bilinearly.
Parameters
conshdlrnonlinear constraint handler
xfirst variable
ysecond variable

Definition at line 11844 of file cons_nonlinear.c.

References NULL, SCIPconshdlrGetData(), SCIPgetBilinTermNonlinear(), SCIPhashtableRetrieve(), SCIPswapPointers(), SCIPvarCompare(), x, SCIP_ConsNonlinear_BilinTerm::x, y, and SCIP_ConsNonlinear_BilinTerm::y.

Referenced by addRltTerm(), bilinearTermsInsertEntry(), isAcceptableRow(), markRowsXj(), SCIPgetBilinTermNonlinear(), and SCIPgetBilinTermsNonlinear().

◆ SCIPgetBilinTermNonlinear()

SCIP_CONSNONLINEAR_BILINTERM* SCIPgetBilinTermNonlinear ( SCIP_CONSHDLR conshdlr,
SCIP_VAR x,
SCIP_VAR y 
)

returns the bilinear term that represents the product of two given variables

Note
The method should only be used after auxiliary variables have been created, i.e., after CONSINITLP.
Returns
The method returns NULL if the variables do not appear bilinearly.
Parameters
conshdlrnonlinear constraint handler
xfirst variable
ysecond variable

Definition at line 11889 of file cons_nonlinear.c.

References NULL, SCIP_Real, SCIPconshdlrGetData(), SCIPevalBilinAuxExprNonlinear(), and SCIPgetBilinTermIdxNonlinear().

Referenced by SCIPgetBilinTermIdxNonlinear().

◆ SCIPevalBilinAuxExprNonlinear()

SCIP_Real SCIPevalBilinAuxExprNonlinear ( SCIP scip,
SCIP_VAR x,
SCIP_VAR y,
SCIP_CONSNONLINEAR_AUXEXPR auxexpr,
SCIP_SOL sol 
)

evaluates an auxiliary expression for a bilinear term

Parameters
scipSCIP data structure
xfirst variable of the bilinear term
ysecond variable of the bilinear term
auxexprauxiliary expression
solsolution at which to evaluate (can be NULL)

Definition at line 11917 of file cons_nonlinear.c.

References SCIP_ConsNonlinear_Auxexpr::auxvar, SCIP_ConsNonlinear_Auxexpr::coefs, SCIP_ConsNonlinear_Auxexpr::cst, NULL, SCIPgetSolVal(), and SCIPinsertBilinearTermExistingNonlinear().

Referenced by getBestEstimators(), markRowsXj(), SCIPgetBilinTermNonlinear(), and separateMcCormickImplicit().

◆ SCIPinsertBilinearTermExistingNonlinear()

SCIP_RETCODE SCIPinsertBilinearTermExistingNonlinear ( SCIP scip,
SCIP_CONSHDLR conshdlr,
SCIP_VAR x,
SCIP_VAR y,
SCIP_VAR auxvar,
int  nlockspos,
int  nlocksneg 
)

stores the variables of a bilinear term in the data of the constraint handler

Parameters
scipSCIP data structure
conshdlrconstraint handler
xfirst variable
ysecond variable
auxvarauxiliary variable (might be NULL)
nlocksposnumber of positive expression locks
nlocksnegnumber of negative expression locks

Definition at line 11936 of file cons_nonlinear.c.

References SCIP_ConsNonlinear_BilinTerm::aux, bilinearTermsInsertEntry(), SCIP_ConsNonlinear_BilinTerm::nauxexprs, NULL, SCIP_CALL, SCIP_OKAY, SCIPcaptureVar(), SCIPconshdlrGetData(), SCIPinsertBilinearTermImplicitNonlinear(), TRUE, and SCIP_ConsNonlinear_BilinTerm::var.

Referenced by bilinearTermsInsertAll(), and SCIPevalBilinAuxExprNonlinear().

◆ SCIPinsertBilinearTermImplicitNonlinear()

SCIP_RETCODE SCIPinsertBilinearTermImplicitNonlinear ( SCIP scip,
SCIP_CONSHDLR conshdlr,
SCIP_VAR x,
SCIP_VAR y,
SCIP_VAR auxvar,
SCIP_Real  coefx,
SCIP_Real  coefy,
SCIP_Real  coefaux,
SCIP_Real  cst,
SCIP_Bool  overestimate 
)

stores the variables of a bilinear term in the data of the constraint handler

Parameters
scipSCIP data structure
conshdlrconstraint handler
xfirst variable
ysecond variable
auxvarauxiliary variable (might be NULL)
coefxcoefficient of x in the auxiliary expression
coefycoefficient of y in the auxiliary expression
coefauxcoefficient of auxvar in the auxiliary expression
cstconstant of the auxiliary expression
overestimatewhether the auxiliary expression overestimates the bilinear product

Definition at line 11973 of file cons_nonlinear.c.

References SCIP_ConsNonlinear_BilinTerm::aux, SCIP_ConsNonlinear_Auxexpr::auxvar, bilinearTermsInsertEntry(), bilinTermAddAuxExpr(), SCIP_ConsNonlinear_Auxexpr::coefs, SCIP_ConsNonlinear_Auxexpr::cst, SCIP_ConsNonlinear_BilinTerm::existing, SCIP_ConsNonlinear_BilinTerm::exprs, FALSE, SCIP_ConsNonlinear_BilinTerm::nauxexprs, SCIP_ConsNonlinear_BilinTerm::nlocksneg, SCIP_ConsNonlinear_BilinTerm::nlockspos, NULL, SCIP_ConsNonlinear_Auxexpr::overestimate, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPallocBlockMemory, SCIPcaptureVar(), SCIPcomputeFacetVertexPolyhedralNonlinear(), SCIPconshdlrGetData(), SCIPfreeBlockMemory, SCIPvarCompare(), SCIP_ConsNonlinear_Auxexpr::underestimate, SCIP_ConsNonlinear_BilinTerm::var, SCIP_ConsNonlinear_BilinTerm::x, and SCIP_ConsNonlinear_BilinTerm::y.

Referenced by extractProducts(), and SCIPinsertBilinearTermExistingNonlinear().

◆ SCIPcomputeFacetVertexPolyhedralNonlinear()

SCIP_RETCODE SCIPcomputeFacetVertexPolyhedralNonlinear ( SCIP scip,
SCIP_CONSHDLR conshdlr,
SCIP_Bool  overestimate,
SCIP_DECL_VERTEXPOLYFUN((*function))  ,
void *  fundata,
SCIP_Real xstar,
SCIP_Real box,
int  nallvars,
SCIP_Real  targetvalue,
SCIP_Bool success,
SCIP_Real facetcoefs,
SCIP_Real facetconstant 
)

computes a facet of the convex or concave envelope of a vertex polyhedral function

If \( f(x) \) is vertex-polyhedral, then \( g \) is a convex underestimator if and only if \( g(v^i) \leq f(v^i), \forall i \), where \( \{ v^i \}_{i = 1}^{2^n} \subseteq \mathbb R^n \) are the vertices of the domain of \( x \), \( [\ell,u] \). Hence, we can compute a linear underestimator by solving the following LP (we don't necessarily get a facet of the convex envelope, see below):

\begin{align*} \max \, & \alpha^T x^* + \beta \\ s.t. \; & \alpha^T v^i + \beta \le f(v^i), \, \forall i = 1, \ldots, 2^n \end{align*}

In principle, one would need to update the LP whenever the domain changes. However, \( [\ell,u] = T([0, 1]^n) \), where \( T \) is an affine linear invertible transformation given by \( T(y)_i = (u_i - \ell_i) y_i + \ell_i \). Working with the change of variables \( x = T(y) \) allows us to keep the constraints of the LP, even if the domain changes. Indeed, after the change of variables, the problem is: find an affine underestimator \( g \) such that \( g(T(y)) \le f(T(y)) \), for all \( y \in [0, 1]^n \). Now \( f(T(y)) \) is componentwise affine, but still satisfies that \( g \) is a valid underestimator if and only if \( g(T(u)) \leq f(T(u)), \forall u \in \{0, 1\}^n \). So we now look for \( \bar g(y) := g(T(y)) = g(((u_i - \ell_i) y_i + \ell_i)_i) = \bar \alpha^T y + \bar \beta \), where \( \bar \alpha_i = (u_i - \ell_i) \alpha_i \) and \( \bar \beta = \sum_i \alpha_i \ell_i + \beta \). So we find \( \bar g \) by solving the LP:

\begin{align*} \max \, & \bar \alpha^T T^{-1}(x^*) + \bar \beta \\ s.t. \; & \bar \alpha^T u + \bar \beta \le f(T(u)), \, \forall u \in \{0, 1\}^n \end{align*}

and recover \( g \) by calculating \( \bar \alpha_i = (u_i - \ell_i) \alpha_i, \bar \beta = \sum_i \alpha_i \ell_i + \beta \). Notice that \( f(T(u^i)) = f(v^i) \) so the right hand side doesn't change after the change of variables.

Furthermore, the LP has more constraints than variables, so we solve its dual:

\begin{align*} \min \, & \sum_i \lambda_i f(v^i) \\ s.t. \; & \sum_i \lambda_i u^i = T^{-1}(x^*) \\ & \sum_i \lambda_i = 1 \\ & \forall i, \, \lambda_i \geq 0 \end{align*}

In case we look for an overestimate, we do exactly the same, but have to maximize in the dual LP instead of minimize.

Technical and implementation details

  1. \( U \) has exponentially many variables, so we only apply this separator for \(n\) ≤ SCIP_MAXVERTEXPOLYDIM.
  2. If the bounds are not finite, there is no underestimator. Also, \( T^{-1}(x^*) \) must be in the domain, otherwise the dual is infeasible.
  3. After a facet is computed, we check whether it is a valid facet (i.e. we check \( \alpha^T v + \beta \le f(v) \) for every vertex \( v \)). If we find a violation of at most ADJUSTFACETFACTOR * SCIPlpfeastol(), then we weaken \( \beta \) by this amount, otherwise, we discard the cut.
  4. If a variable is fixed within tolerances, we replace it with its value and compute the facet of the remaining expression. Note that since we are checking the cut for validity, this will never produce wrong result.
  5. If \( x^* \) is in the boundary of the domain, then the LP has infinitely many solutions, some of which might have very bad numerical properties. For this reason, we perturb \( x^* \) to be in the interior of the region. Furthermore, for some interior points, there might also be infinitely many solutions (e.g. for \( x y \) in \( [0,1]^2 \) any point \( (x^*, y^*) \) such that \( y^* = 1 - x^* \) has infinitely many solutions). For this reason, we perturb any given \( x^* \). The idea is to try to get a facet of the convex/concave envelope. This only happens when the solution has \( n + 1 \) non zero \( \lambda \)'s (i.e. the primal has a unique solution).
  6. We need to compute \( f(v^i) \) for every vertex of \( [\ell,u] \). A vertex is encoded by a number between 0 and \( 2^n - 1 \), via its binary representation (0 bit is lower bound, 1 bit is upper bound), so we can compute all these values by iterating between 0 and \( 2^n - 1 \).
  7. To check that the computed cut is valid we do the following: we use a gray code to loop over the vertices of the box domain w.r.t. unfixed variables in order to evaluate the underestimator. To ensure the validity of the underestimator, we check whether \( \alpha v^i + \beta \le f(v^i) \) for every vertex \( v^i \) and adjust \( \beta \) if the maximal violation is small.
Parameters
scipSCIP data structure
conshdlrnonlinear constraint handler
overestimatewhether to compute facet of concave (TRUE) or convex (FALSE) envelope
fundatadata for function evaluation (can be NULL)
xstarpoint to be separated
boxbox where to compute facet: should be lb_1, ub_1, lb_2, ub_2...
nallvarshalf of the length of box
targetvaluetarget value: no need to compute facet if value in xstar would be worse than this value
successbuffer to store whether a facet could be computed successfully
facetcoefsbuffer to store coefficients of facet defining inequality; must be an array of length at least nallvars
facetconstantbuffer to store constant part of facet defining inequality

Definition at line 12071 of file cons_nonlinear.c.

References BMSclearMemoryArray, computeVertexPolyhedralFacetBivariate(), computeVertexPolyhedralFacetLP(), computeVertexPolyhedralFacetUnivariate(), computeVertexPolyhedralMaxFacetError(), FALSE, NULL, POWEROFTWO, REALABS, SCIP_CALL, SCIP_INVALID, SCIP_MAXVERTEXPOLYDIM, SCIP_OKAY, SCIP_Real, SCIP_STAGE_SOLVING, SCIPallocBufferArray, SCIPconshdlrGetData(), SCIPdebugMsg, SCIPdebugMsgPrint, SCIPfeastol(), SCIPfreeBufferArray, SCIPgetExprNonlinear(), SCIPgetLPFeastol(), SCIPgetStage(), SCIPisInfinity(), SCIPisRelEQ(), and SCIPwarningMessage().

Referenced by estimateVertexPolyhedral(), estimateVertexPolyhedralProduct(), and SCIPinsertBilinearTermImplicitNonlinear().

◆ SCIPgetExprNonlinear()

◆ SCIPgetLhsNonlinear()

◆ SCIPgetRhsNonlinear()

◆ SCIPgetNlRowNonlinear()

SCIP_RETCODE SCIPgetNlRowNonlinear ( SCIP scip,
SCIP_CONS cons,
SCIP_NLROW **  nlrow 
)

gets the nonlinear constraint as a nonlinear row representation.

Parameters
scipSCIP data structure
consconstraint
nlrowpointer to store nonlinear row

Definition at line 12310 of file cons_nonlinear.c.

References CONSHDLR_NAME, createNlRow(), NULL, SCIP_CALL, SCIP_OKAY, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPgetCurvatureNonlinear().

Referenced by createCoveringProblem(), SCIPgetNlRowAbspower(), SCIPgetNlRowQuadratic(), SCIPgetNlRowSOC(), and SCIPgetRhsNonlinear().

◆ SCIPgetCurvatureNonlinear()

SCIP_EXPRCURV SCIPgetCurvatureNonlinear ( SCIP_CONS cons)

returns the curvature of the expression of a given nonlinear constraint

Note
The curvature information is computed during CONSINITSOL.
Parameters
consconstraint data

Definition at line 12339 of file cons_nonlinear.c.

References CONSHDLR_NAME, NULL, SCIPcheckQuadraticNonlinear(), SCIPconsGetData(), SCIPconsGetHdlr(), and SCIPconshdlrGetName().

Referenced by checkSubproblemConvexity(), and SCIPgetNlRowNonlinear().

◆ SCIPcheckQuadraticNonlinear()

SCIP_RETCODE SCIPcheckQuadraticNonlinear ( SCIP scip,
SCIP_CONS cons,
SCIP_Bool isquadratic 
)

checks whether expression of constraint can be represented as quadratic form

Only sets *isquadratic to TRUE if the whole expression is quadratic (in the non-extended formulation) and non-linear. That is, the expression in each SCIP_QUADEXPR_QUADTERM will be a variable expressions and SCIPgetVarExprVar() can be used to retrieve the variable.

Parameters
scipSCIP data structure
consconstraint data
isquadraticbuffer to store whether constraint is quadratic

Definition at line 12360 of file cons_nonlinear.c.

References CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIPcheckExprQuadratic(), SCIPchgLhsNonlinear(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPexprAreQuadraticExprsVariables().

Referenced by SCIPgetCurvatureNonlinear(), SCIPwriteLp(), and SCIPwriteMps().

◆ SCIPchgLhsNonlinear()

SCIP_RETCODE SCIPchgLhsNonlinear ( SCIP scip,
SCIP_CONS cons,
SCIP_Real  lhs 
)

changes left-hand-side of a nonlinear constraint

Attention
This method can only be called in the problem stage.
Parameters
scipSCIP data structure
consconstraint data
lhsnew left-hand-side

Definition at line 12391 of file cons_nonlinear.c.

References CONSHDLR_NAME, FALSE, NULL, SCIP_INVALIDCALL, SCIP_OKAY, SCIP_STAGE_PROBLEM, SCIPchgRhsNonlinear(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPconsIsOriginal(), SCIPerrorMessage, and SCIPgetStage().

Referenced by AMPLProblemHandler::OnConBounds(), SCIPaddConstantQuadratic(), SCIPcheckQuadraticNonlinear(), and SCIPchgLhsQuadratic().

◆ SCIPchgRhsNonlinear()

SCIP_RETCODE SCIPchgRhsNonlinear ( SCIP scip,
SCIP_CONS cons,
SCIP_Real  rhs 
)

changes right-hand-side of a nonlinear constraint

Attention
This method can only be called in the problem stage.
Parameters
scipSCIP data structure
consconstraint data
rhsnew right-hand-side

Definition at line 12430 of file cons_nonlinear.c.

References CONSHDLR_NAME, FALSE, NULL, SCIP_INVALIDCALL, SCIP_OKAY, SCIP_STAGE_PROBLEM, SCIPchgExprNonlinear(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPconsIsOriginal(), SCIPerrorMessage, and SCIPgetStage().

Referenced by AMPLProblemHandler::OnConBounds(), SCIPaddConstantQuadratic(), SCIPchgLhsNonlinear(), and SCIPchgRhsQuadratic().

◆ SCIPchgExprNonlinear()

SCIP_RETCODE SCIPchgExprNonlinear ( SCIP scip,
SCIP_CONS cons,
SCIP_EXPR expr 
)

changes expression of a nonlinear constraint

Attention
This method can only be called in the problem stage.
Parameters
scipSCIP data structure
consconstraint data
exprnew expression

Definition at line 12469 of file cons_nonlinear.c.

References CONSHDLR_NAME, FALSE, NULL, SCIP_CALL, SCIP_EXPRCURV_UNKNOWN, SCIP_INVALIDCALL, SCIP_OKAY, SCIP_STAGE_PROBLEM, SCIPaddLinearVarNonlinear(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPconsIsOriginal(), SCIPduplicateExpr(), SCIPerrorMessage, SCIPgetStage(), and SCIPreleaseExpr().

Referenced by AMPLProblemHandler::OnAlgebraicCon(), and SCIPchgRhsNonlinear().

◆ SCIPaddLinearVarNonlinear()

SCIP_RETCODE SCIPaddLinearVarNonlinear ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var,
SCIP_Real  coef 
)

◆ SCIPaddExprNonlinear()

SCIP_RETCODE SCIPaddExprNonlinear ( SCIP scip,
SCIP_CONS cons,
SCIP_EXPR expr,
SCIP_Real  coef 
)

adds coef * expr to nonlinear constraint

Attention
This method can only be called in the problem stage.
Parameters
scipSCIP data structure
consnonlinear constraint
exprexpression
coefcoefficient

Definition at line 12596 of file cons_nonlinear.c.

References CONSHDLR_NAME, FALSE, NULL, SCIP_CALL, SCIP_INVALIDCALL, SCIP_OKAY, SCIP_Real, SCIP_STAGE_PROBLEM, SCIPappendExprSumExpr(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPconsIsOriginal(), SCIPcreateExprSum(), SCIPduplicateExpr(), SCIPerrorMessage, SCIPexprGetNUses(), SCIPgetAbsViolationNonlinear(), SCIPgetStage(), SCIPisExprSum(), and SCIPreleaseExpr().

Referenced by SCIPaddBilinTermQuadratic(), SCIPaddLinearVarNonlinear(), SCIPaddQuadVarQuadratic(), and SCIPaddSquareCoefQuadratic().

◆ SCIPgetAbsViolationNonlinear()

SCIP_RETCODE SCIPgetAbsViolationNonlinear ( SCIP scip,
SCIP_CONS cons,
SCIP_SOL sol,
SCIP_Real viol 
)

gets absolute violation of nonlinear constraint

This function evaluates the constraints in the given solution.

If this value is at most SCIPfeastol(), the constraint would be considered feasible.

Parameters
scipSCIP data structure
consconstraint
solsolution to check
violbuffer to store computed violation

Definition at line 12672 of file cons_nonlinear.c.

References computeViolation(), getConsAbsViolation(), NULL, SCIP_CALL, SCIP_OKAY, and SCIPgetRelViolationNonlinear().

Referenced by SCIPaddExprNonlinear().

◆ SCIPgetRelViolationNonlinear()

SCIP_RETCODE SCIPgetRelViolationNonlinear ( SCIP scip,
SCIP_CONS cons,
SCIP_SOL sol,
SCIP_Real viol 
)

gets scaled violation of nonlinear constraint

This function evaluates the constraints in the given solution.

The scaling that is applied to the absolute violation of the constraint depends on the setting of parameter constraints/nonlinear/violscale.

Parameters
scipSCIP data structure
consconstraint
solsolution to check
violbuffer to store computed violation

Definition at line 12695 of file cons_nonlinear.c.

References computeViolation(), getConsRelViolation(), NULL, SCIP_CALL, SCIP_OKAY, and SCIPgetLinvarMayDecreaseNonlinear().

Referenced by SCIPgetAbsViolationNonlinear().

◆ SCIPgetLinvarMayDecreaseNonlinear()

void SCIPgetLinvarMayDecreaseNonlinear ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR **  var,
SCIP_Real coef 
)

returns a variable that appears linearly that may be decreased without making any other constraint infeasible

Parameters
scipSCIP data structure
consnonlinear constraint
varpointer to store the variable
coefpointer to store the coefficient

Definition at line 12712 of file cons_nonlinear.c.

References findUnlockedLinearVar(), NULL, SCIPconsGetData(), and SCIPgetLinvarMayIncreaseNonlinear().

Referenced by SCIPgetRelViolationNonlinear().

◆ SCIPgetLinvarMayIncreaseNonlinear()

void SCIPgetLinvarMayIncreaseNonlinear ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR **  var,
SCIP_Real coef 
)

returns a variable that appears linearly that may be increased without making any other constraint infeasible

Parameters
scipSCIP data structure
consnonlinear constraint
varpointer to store the variable
coefpointer to store the coefficient

Definition at line 12736 of file cons_nonlinear.c.

References findUnlockedLinearVar(), NULL, SCIPconsGetData(), and SCIPgetExprNLocksPosNonlinear().

Referenced by checkConsQuadraticProblem(), and SCIPgetLinvarMayDecreaseNonlinear().

◆ SCIPgetExprNLocksPosNonlinear()

int SCIPgetExprNLocksPosNonlinear ( SCIP_EXPR expr)

returns the number of positive rounding locks of an expression

Parameters
exprexpression

Definition at line 12765 of file cons_nonlinear.c.

References NULL, SCIPexprGetOwnerData(), and SCIPgetExprNLocksNegNonlinear().

Referenced by bilinboundGetLocksNeg(), bilinearTermsInsertAll(), detectSocNorm(), detectSocQuadraticComplex(), and SCIPgetLinvarMayIncreaseNonlinear().

◆ SCIPgetExprNLocksNegNonlinear()

int SCIPgetExprNLocksNegNonlinear ( SCIP_EXPR expr)

returns the number of negative rounding locks of an expression

Parameters
exprexpression

Definition at line 12776 of file cons_nonlinear.c.

References NULL, SCIPexprGetOwnerData(), and SCIPgetExprAuxVarNonlinear().

Referenced by bilinboundGetY(), bilinearTermsInsertAll(), detectSocQuadraticComplex(), and SCIPgetExprNLocksPosNonlinear().

◆ SCIPgetExprAuxVarNonlinear()

◆ SCIPgetExprNEnfosNonlinear()

int SCIPgetExprNEnfosNonlinear ( SCIP_EXPR expr)

returns the number of enforcements for an expression

Parameters
exprexpression

Definition at line 12805 of file cons_nonlinear.c.

References NULL, SCIPexprGetOwnerData(), and SCIPgetExprEnfoDataNonlinear().

Referenced by SCIP_DECL_NLHDLRDETECT(), SCIP_DECL_NLHDLRENFO(), SCIP_DECL_NLHDLREVALAUX(), and SCIPgetExprAuxVarNonlinear().

◆ SCIPgetExprEnfoDataNonlinear()

void SCIPgetExprEnfoDataNonlinear ( SCIP_EXPR expr,
int  idx,
SCIP_NLHDLR **  nlhdlr,
SCIP_NLHDLREXPRDATA **  nlhdlrexprdata,
SCIP_NLHDLR_METHOD nlhdlrparticipation,
SCIP_Bool sepabelowusesactivity,
SCIP_Bool sepaaboveusesactivity,
SCIP_Real auxvalue 
)

returns the data for one of the enforcements of an expression

Parameters
exprexpression
idxposition of enforcement in enfos array
nlhdlrbuffer to store nlhldr
nlhdlrexprdatabuffer to store nlhdlr data for expression, or NULL
nlhdlrparticipationbuffer to store methods where nonlinear handler participates, or NULL
sepabelowusesactivitybuffer to store whether sepabelow uses activity of some expression, or NULL
sepaaboveusesactivitybuffer to store whether sepaabove uses activity of some expression, or NULL
auxvaluebuffer to store current auxvalue, or NULL

Definition at line 12816 of file cons_nonlinear.c.

References NULL, SCIPexprGetOwnerData(), and SCIPsetExprEnfoAuxValueNonlinear().

Referenced by SCIP_DECL_NLHDLRDETECT(), SCIP_DECL_NLHDLRENFO(), SCIP_DECL_NLHDLREVALAUX(), and SCIPgetExprNEnfosNonlinear().

◆ SCIPsetExprEnfoAuxValueNonlinear()

void SCIPsetExprEnfoAuxValueNonlinear ( SCIP_EXPR expr,
int  idx,
SCIP_Real  auxvalue 
)

sets the auxiliary value of expression for one of the enforcements of an expression

Parameters
exprexpression
idxposition of enforcement in enfos array
auxvaluethe new value of auxval

Definition at line 12857 of file cons_nonlinear.c.

References NULL, SCIPexprGetOwnerData(), and SCIPgetExprNPropUsesActivityNonlinear().

Referenced by SCIP_DECL_NLHDLREVALAUX(), and SCIPgetExprEnfoDataNonlinear().

◆ SCIPgetExprNPropUsesActivityNonlinear()

unsigned int SCIPgetExprNPropUsesActivityNonlinear ( SCIP_EXPR expr)

number of nonlinear handlers whose activity computation and propagation methods depend on the activity of the expression

Note
This method can only be used after the detection methods of the nonlinear handlers have been called.
Parameters
exprexpression

Definition at line 12881 of file cons_nonlinear.c.

References NULL, SCIPexprGetOwnerData(), and SCIPgetExprNSepaUsesActivityNonlinear().

Referenced by SCIPsetExprEnfoAuxValueNonlinear().

◆ SCIPgetExprNSepaUsesActivityNonlinear()

unsigned int SCIPgetExprNSepaUsesActivityNonlinear ( SCIP_EXPR expr)

number of nonlinear handlers whose separation methods (estimate or enforcement) depend on the activity of the expression

Note
This method can only be used after the detection methods of the nonlinear handlers have been called.
Parameters
exprexpression

Definition at line 12895 of file cons_nonlinear.c.

References NULL, SCIPexprGetOwnerData(), and SCIPgetExprNAuxvarUsesNonlinear().

Referenced by SCIPgetExprNPropUsesActivityNonlinear().

◆ SCIPgetExprNAuxvarUsesNonlinear()

unsigned int SCIPgetExprNAuxvarUsesNonlinear ( SCIP_EXPR expr)

number of nonlinear handlers whose separation methods (estimate or enforcement) use auxiliary variable of the expression

Note
This method can only be used after the detection methods of the nonlinear handlers have been called.
Parameters
exprexpression

Definition at line 12909 of file cons_nonlinear.c.

References NULL, SCIPexprGetOwnerData(), and SCIPregisterExprUsageNonlinear().

Referenced by detectExpr(), SCIP_DECL_NLHDLRDETECT(), and SCIPgetExprNSepaUsesActivityNonlinear().

◆ SCIPregisterExprUsageNonlinear()

SCIP_RETCODE SCIPregisterExprUsageNonlinear ( SCIP scip,
SCIP_EXPR expr,
SCIP_Bool  useauxvar,
SCIP_Bool  useactivityforprop,
SCIP_Bool  useactivityforsepabelow,
SCIP_Bool  useactivityforsepaabove 
)

method to be called by a nlhdlr during NLHDLRDETECT to notify an expression that it will be used

  • if useauxvar is enabled, then ensures that an auxiliary variable will be created in INITLP
  • if useactivityforprop or useactivityforsepa{below,above} is enabled, then ensured that activity will be updated for expr
  • if useactivityforprop is enabled, then increments the count returned by SCIPgetExprNPropUsesActivityNonlinear()
  • if useactivityforsepa{below,above} is enabled, then increments the count returned by SCIPgetExprNSepaUsesActivityNonlinear() and also increments this count for all variables in the expression.

The distinction into useactivityforprop and useactivityforsepa{below,above} is to recognize variables which domain influences under/overestimators. Domain propagation routines (like OBBT) may invest more work for these variables. The distinction into useactivityforsepabelow and useactivityforsepaabove is to recognize whether a nlhdlr that called this method will use activity of expr in enfomethod SCIP_NLHDLR_METHOD_SEPABELOW or SCIP_NLHDLR_METHOD_SEPAABOVE.

Parameters
scipSCIP data structure
exprexpression
useauxvarwhether an auxiliary variable will be used for estimate or cut generation
useactivityforpropwhether activity of expr will be used by domain propagation or activity calculation (inteval)
useactivityforsepabelowwhether activity of expr will be used by underestimation
useactivityforsepaabovewhether activity of expr will be used by overestimation

Definition at line 12932 of file cons_nonlinear.c.

References FALSE, freeEnfoData(), NULL, SCIP_CALL, SCIP_EXPRITER_DFS, SCIP_OKAY, SCIPconshdlrGetData(), SCIPcreateExpriter(), SCIPevalExprActivity(), SCIPexprGetNChildren(), SCIPexprGetOwnerData(), SCIPexpriterGetNext(), SCIPexpriterInit(), SCIPexpriterIsEnd(), SCIPfreeExpriter(), SCIPgetExprAbsOrigViolationNonlinear(), SCIPisExprVar(), and TRUE.

Referenced by createNlhdlrExprData(), detectExpr(), detectNlhdlrs(), detectSocNorm(), detectSocQuadraticComplex(), detectSocQuadraticSimple(), SCIP_DECL_NLHDLRDETECT(), and SCIPgetExprNAuxvarUsesNonlinear().

◆ SCIPgetExprAbsOrigViolationNonlinear()

SCIP_RETCODE SCIPgetExprAbsOrigViolationNonlinear ( SCIP scip,
SCIP_EXPR expr,
SCIP_SOL sol,
SCIP_Longint  soltag,
SCIP_Real viol,
SCIP_Bool violunder,
SCIP_Bool violover 
)

computes absolute violation for auxvar relation in an expression w.r.t. original variables

Assume the expression is f(x), where x are original (i.e., not auxiliary) variables. Assume that f(x) is associated with auxiliary variable z.

If there are negative locks, then returns the violation of z ≤ f(x) and sets violover to TRUE. If there are positive locks, then returns the violation of z ≥ f(x) and sets violunder to TRUE. Of course, if there both negative and positive locks, then return the violation of z = f(x).

If necessary, f is evaluated in the given solution. If that fails (domain error), then viol is set to SCIPinfinity() and both violover and violunder are set to TRUE.

Parameters
scipSCIP data structure
exprexpression
solsolution
soltagtag of solution
violbuffer to store computed violation
violunderbuffer to store whether z >= f(x) is violated, or NULL
violoverbuffer to store whether z <= f(x) is violated, or NULL

Definition at line 13022 of file cons_nonlinear.c.

References getExprAbsOrigViolation(), NULL, SCIP_CALL, SCIP_OKAY, SCIPevalExpr(), and SCIPgetExprAbsAuxViolationNonlinear().

Referenced by SCIPregisterExprUsageNonlinear().

◆ SCIPgetExprAbsAuxViolationNonlinear()

SCIP_RETCODE SCIPgetExprAbsAuxViolationNonlinear ( SCIP scip,
SCIP_EXPR expr,
SCIP_Real  auxvalue,
SCIP_SOL sol,
SCIP_Real viol,
SCIP_Bool violunder,
SCIP_Bool violover 
)

computes absolute violation for auxvar relation in an expression w.r.t. auxiliary variables

Assume the expression is f(w), where w are auxiliary variables that were introduced by some nlhdlr. Assume that f(w) is associated with auxiliary variable z.

If there are negative locks, then returns the violation of z ≤ f(w) and sets violover to TRUE. If there are positive locks, then returns the violation of z ≥ f(w) and sets violunder to TRUE. Of course, if there both negative and positive locks, then return the violation of z = f(w).

If the given value of f(w) is SCIP_INVALID, then viol is set to SCIPinfinity() and both violover and violunder are set to TRUE.

Parameters
scipSCIP data structure
exprexpression
auxvaluethe value of f(w)
solsolution that has been evaluated
violbuffer to store computed violation
violunderbuffer to store whether z >= f(w) is violated, or NULL
violoverbuffer to store whether z <= f(w) is violated, or NULL

Definition at line 13057 of file cons_nonlinear.c.

References getExprAbsAuxViolation(), NULL, SCIP_OKAY, and SCIPgetExprRelAuxViolationNonlinear().

Referenced by SCIP_DECL_NLHDLRENFO(), SCIP_DECL_NLHDLRESTIMATE(), and SCIPgetExprAbsOrigViolationNonlinear().

◆ SCIPgetExprRelAuxViolationNonlinear()

SCIP_RETCODE SCIPgetExprRelAuxViolationNonlinear ( SCIP scip,
SCIP_EXPR expr,
SCIP_Real  auxvalue,
SCIP_SOL sol,
SCIP_Real viol,
SCIP_Bool violunder,
SCIP_Bool violover 
)

computes relative violation for auxvar relation in an expression w.r.t. auxiliary variables

Assume the expression is f(w), where w are auxiliary variables that were introduced by some nlhdlr. Assume that f(w) is associated with auxiliary variable z.

Taking the absolute violation from SCIPgetExprAbsAuxViolationNonlinear(), this function returns the absolute violation divided by max(1,|f(w)|).

If the given value of f(w) is SCIP_INVALID, then viol is set to SCIPinfinity() and both violover and violunder are set to TRUE.

Parameters
scipSCIP data structure
exprexpression
auxvaluethe value of f(w)
solsolution that has been evaluated
violbuffer to store computed violation
violunderbuffer to store whether z >= f(w) is violated, or NULL
violoverbuffer to store whether z <= f(w) is violated, or NULL

Definition at line 13089 of file cons_nonlinear.c.

References getExprAbsAuxViolation(), MAX, NULL, REALABS, SCIP_INVALID, SCIP_OKAY, SCIPgetExprBoundsNonlinear(), and SCIPisInfinity().

Referenced by SCIP_DECL_NLHDLRESTIMATE(), SCIPgetExprAbsAuxViolationNonlinear(), and SCIPprocessRowprepNonlinear().

◆ SCIPgetExprBoundsNonlinear()

SCIP_INTERVAL SCIPgetExprBoundsNonlinear ( SCIP scip,
SCIP_EXPR expr 
)

returns bounds on the expression

This gives an intersection of bounds from

Note
The returned interval can be empty!
Parameters
scipSCIP data structure
exprexpression

Definition at line 13125 of file cons_nonlinear.c.

References NULL, SCIP_INTERVAL_INFINITY, SCIPconshdlrGetData(), SCIPepsilon(), SCIPexprGetActivity(), SCIPexprGetActivityTag(), SCIPexprGetOwnerData(), SCIPintervalIntersectEps(), SCIPintervalSetEntire(), and SCIPtightenExprIntervalNonlinear().

Referenced by getFeasiblePointsBilinear(), propagateBoundsQuadExpr(), reversePropQueue(), SCIP_DECL_NLHDLRREVERSEPROP(), and SCIPgetExprRelAuxViolationNonlinear().

◆ SCIPtightenExprIntervalNonlinear()

SCIP_RETCODE SCIPtightenExprIntervalNonlinear ( SCIP scip,
SCIP_EXPR expr,
SCIP_INTERVAL  newbounds,
SCIP_Bool cutoff,
int *  ntightenings 
)

informs the expression about new bounds that can be used for reverse-propagation and to tighten bounds of corresponding (auxiliary) variable (if any)

Attention
this function should only be called during domain propagation in cons_nonlinear
Parameters
scipSCIP data structure
exprexpression to be tightened
newboundsnew bounds for the expression
cutoffbuffer to store whether a cutoff was detected
ntighteningsbuffer to add the total number of tightenings, or NULL

Definition at line 13181 of file cons_nonlinear.c.

References FALSE, SCIP_Interval::inf, isIntervalBetter(), NULL, SCIP_CALL, SCIP_INTERVAL_INFINITY, SCIP_OKAY, SCIPceil(), SCIPconshdlrGetData(), SCIPdebugMsg, SCIPdebugMsgPrint, SCIPepsilon(), SCIPexprGetActivity(), SCIPexprGetActivityTag(), SCIPexprGetHdlr(), SCIPexprGetNChildren(), SCIPexprGetOwnerData(), SCIPexprhdlrGetName(), SCIPexprIsIntegral(), SCIPfloor(), SCIPintervalIntersectEps(), SCIPintervalIsEmpty(), SCIPintervalIsEntire(), SCIPisInfinity(), SCIPmarkExprPropagateNonlinear(), SCIPprintExpr(), SCIPqueueInsert(), SCIP_Interval::sup, tightenAuxVarBounds(), and TRUE.

Referenced by propagateBoundsLinExpr(), propagateBoundsQuadExpr(), propConss(), reversePropagateLinearExpr(), reversePropQueue(), SCIP_DECL_NLHDLRREVERSEPROP(), and SCIPgetExprBoundsNonlinear().

◆ SCIPmarkExprPropagateNonlinear()

SCIP_RETCODE SCIPmarkExprPropagateNonlinear ( SCIP scip,
SCIP_EXPR expr 
)

mark constraints that include this expression to be propagated again

This can be used by, e.g., nlhdlrs, to trigger a new propagation of constraints without a change of variable bounds, e.g., because new information on the expression is available that could potentially lead to tighter expression activity values.

Note, that this call marks also constraints for propagation which only share some variable with this expression.

Parameters
scipSCIP data structure
exprexpression to propagate again

Definition at line 13327 of file cons_nonlinear.c.

References FALSE, NULL, SCIP_CALL, SCIP_EXPRITER_DFS, SCIP_OKAY, SCIPaddExprViolScoreNonlinear(), SCIPconsGetData(), SCIPcreateExpriter(), SCIPexprGetOwnerData(), SCIPexpriterGetNext(), SCIPexpriterInit(), SCIPexpriterIsEnd(), SCIPfreeExpriter(), SCIPincrementCurBoundsTagNonlinear(), and SCIPisExprVar().

Referenced by SCIPaddIneqBilinear(), and SCIPtightenExprIntervalNonlinear().

◆ SCIPaddExprViolScoreNonlinear()

void SCIPaddExprViolScoreNonlinear ( SCIP scip,
SCIP_EXPR expr,
SCIP_Real  violscore 
)

adds violation-branching score to an expression

Adds a score to the expression-specific violation-branching score, thereby marking it as branching candidate. The expression must either be a variable expression or have an aux-variable. In the latter case, branching on auxiliary variables must have been enabled. In case of doubt, use SCIPaddExprsViolScoreNonlinear(). Roughly, the difference between these functions is that the current function adds violscore to the expression directly, while SCIPaddExprsViolScoreNonlinear() will split the violation score among all the given expressions according to parameter constraints/nonlinear/branching/violsplit.

See also
SCIPaddExprsViolScoreNonlinear()
Parameters
scipSCIP data structure
exprexpression where to add branching score
violscoreviolation score to add to expression

Definition at line 13380 of file cons_nonlinear.c.

References branchAuxNonlinear(), NULL, SCIPaddExprsViolScoreNonlinear(), SCIPconshdlrGetData(), SCIPexprGetOwnerData(), and SCIPisExprVar().

Referenced by addExprsViolScore(), and SCIPmarkExprPropagateNonlinear().

◆ SCIPaddExprsViolScoreNonlinear()

SCIP_RETCODE SCIPaddExprsViolScoreNonlinear ( SCIP scip,
SCIP_EXPR **  exprs,
int  nexprs,
SCIP_Real  violscore,
SCIP_SOL sol,
SCIP_Bool success 
)

adds violation-branching score to a set of expressions, distributing the score among all the expressions

Each expression must either be a variable expression or have an aux-variable. If branching on aux-variables is disabled, then the violation branching score will be distributed among all variables present in exprs.

Parameters
scipSCIP data structure
exprsexpressions where to add branching score
nexprsnumber of expressions
violscoreviolation score to add to expression
solcurrent solution
successbuffer to store whether at least one violscore was added

Definition at line 13426 of file cons_nonlinear.c.

References addExprsViolScore(), branchAuxNonlinear(), FALSE, NULL, SCIP_CALL, SCIP_EXPRITER_DFS, SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPcalcMemGrowSize(), SCIPcreateExpriter(), SCIPexprGetOwnerData(), SCIPexpriterGetNext(), SCIPexpriterInit(), SCIPexpriterIsEnd(), SCIPexpriterRestartDFS(), SCIPfreeBufferArray, SCIPfreeExpriter(), SCIPgetExprViolScoreNonlinear(), SCIPisExprVar(), and SCIPreallocBufferArray.

Referenced by addExprViolScoresAuxVars(), SCIP_DECL_NLHDLRESTIMATE(), and SCIPaddExprViolScoreNonlinear().

◆ SCIPgetExprViolScoreNonlinear()

SCIP_Real SCIPgetExprViolScoreNonlinear ( SCIP_EXPR expr)

gives violation-branching score stored in expression, or 0.0 if no valid score has been stored

Parameters
exprexpression

Definition at line 13497 of file cons_nonlinear.c.

References NULL, SCIP_INVALID, SCIP_Real, SCIPABORT, SCIPconshdlrGetData(), SCIPerrorMessage, SCIPexprGetOwnerData(), and SCIPgetExprPartialDiffNonlinear().

Referenced by collectBranchingCandidates(), registerBranchingCandidates(), and SCIPaddExprsViolScoreNonlinear().

◆ SCIPgetExprPartialDiffNonlinear()

SCIP_Real SCIPgetExprPartialDiffNonlinear ( SCIP scip,
SCIP_EXPR expr,
SCIP_VAR var 
)

returns the partial derivative of an expression w.r.t. a variable (or SCIP_INVALID if there was an evaluation error)

See also
SCIPexprGetDerivative()
Parameters
scipSCIP data structure
exprroot expression of constraint used in the last SCIPevalExprGradient() call
varvariable (needs to be in the expression)

Definition at line 13543 of file cons_nonlinear.c.

References NULL, SCIP_INVALID, SCIP_Real, SCIPconshdlrGetData(), SCIPexprGetDerivative(), SCIPexprGetDiffTag(), SCIPexprGetOwnerData(), SCIPgetExprPartialDiffGradientDirNonlinear(), SCIPhashmapExists(), SCIPhashmapGetImage(), SCIPisExprValue(), and SCIPisExprVar().

Referenced by SCIPgetExprViolScoreNonlinear().

◆ SCIPgetExprPartialDiffGradientDirNonlinear()

SCIP_Real SCIPgetExprPartialDiffGradientDirNonlinear ( SCIP scip,
SCIP_EXPR expr,
SCIP_VAR var 
)

returns the var's coordinate of Hu partial derivative of an expression w.r.t. a variable (or SCIP_INVALID if there was an evaluation error)

See also
SCIPexprGetBardot()
Parameters
scipSCIP data structure
exprroot expression of constraint used in the last SCIPevalExprHessianDir() call
varvariable (needs to be in the expression)

Definition at line 13589 of file cons_nonlinear.c.

References NULL, SCIP_INVALID, SCIP_Real, SCIPconshdlrGetData(), SCIPevalExprQuadraticAuxNonlinear(), SCIPexprGetBardot(), SCIPexprGetDiffTag(), SCIPexprGetOwnerData(), SCIPhashmapExists(), SCIPhashmapGetImage(), SCIPisExprValue(), and SCIPisExprVar().

Referenced by SCIPgetExprPartialDiffNonlinear().

◆ SCIPevalExprQuadraticAuxNonlinear()

SCIP_Real SCIPevalExprQuadraticAuxNonlinear ( SCIP scip,
SCIP_EXPR expr,
SCIP_SOL sol 
)

evaluates quadratic term in a solution w.r.t. auxiliary variables

Note
This requires that for every expr used in the quadratic data, a variable or auxiliary variable is available.
Parameters
scipSCIP data structure
exprquadratic expression
solsolution to evaluate, or NULL for LP solution

Definition at line 13635 of file cons_nonlinear.c.

References NULL, SCIP_Real, SCIPexprGetQuadraticBilinTerm(), SCIPexprGetQuadraticData(), SCIPexprGetQuadraticQuadTerm(), SCIPgetExprAuxVarNonlinear(), SCIPgetSolVal(), and SCIPincludeNlhdlrNonlinear().

Referenced by SCIPgetExprPartialDiffGradientDirNonlinear().

◆ SCIPcreateConsOr()

SCIP_RETCODE SCIPcreateConsOr ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR resvar,
int  nvars,
SCIP_VAR **  vars,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures an or constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
resvarresultant variable of the operation
nvarsnumber of operator variables in the constraint
varsarray with operator variables of constraint
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 2100 of file cons_or.c.

References consdataCreate(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPconshdlrGetData(), SCIPcreateCons(), SCIPcreateConsBasicOr(), SCIPerrorMessage, and SCIPfindConshdlr().

Referenced by CREATE_CONSTRAINT(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSPARSE(), SCIPcreateConsBasicOr(), and SCIPincludeConshdlrOr().

◆ SCIPcreateConsBasicOr()

SCIP_RETCODE SCIPcreateConsBasicOr ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR resvar,
int  nvars,
SCIP_VAR **  vars 
)

creates and captures an or constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsNonlinear(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsOr() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures an or constraint in its most basic variant, i. e., with all constraint flags set to their default values

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
resvarresultant variable of the operation
nvarsnumber of operator variables in the constraint
varsarray with operator variables of constraint

Definition at line 2162 of file cons_or.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcreateConsOr(), SCIPgetNVarsOr(), and TRUE.

Referenced by SCIPcreateConsOr().

◆ SCIPgetNVarsOr()

int SCIPgetNVarsOr ( SCIP scip,
SCIP_CONS cons 
)

gets number of variables in or constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 2178 of file cons_or.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetVarsOr().

Referenced by computeSymmetryGroup(), SCIP_DECL_CONSCOPY(), and SCIPcreateConsBasicOr().

◆ SCIPgetVarsOr()

SCIP_VAR** SCIPgetVarsOr ( SCIP scip,
SCIP_CONS cons 
)

gets array of variables in or constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 2201 of file cons_or.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetResultantOr().

Referenced by computeSymmetryGroup(), SCIP_DECL_CONSCOPY(), and SCIPgetNVarsOr().

◆ SCIPgetResultantOr()

SCIP_VAR* SCIPgetResultantOr ( SCIP scip,
SCIP_CONS cons 
)

gets the resultant variable in or constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 2224 of file cons_or.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by computeSymmetryGroup(), SCIP_DECL_CONSCOPY(), and SCIPgetVarsOr().

◆ SCIPcheckSolutionOrbisack()

SCIP_RETCODE SCIPcheckSolutionOrbisack ( SCIP scip,
SCIP_SOL sol,
SCIP_VAR **  vars1,
SCIP_VAR **  vars2,
int  nrows,
SCIP_Bool  printreason,
SCIP_Bool feasible 
)

checks whether a given binary solution is feasible for the orbisack

checks given solution for feasibility

Parameters
scipSCIP data structure
solsolution to check for feasibility
vars1variables of first column
vars2variables of second column
nrowsnumber of rows
printreasonwhether reason for infeasibility should be printed
feasiblememory address to store whether sol is feasible

Definition at line 2030 of file cons_orbisack.c.

References FALSE, NULL, SCIP_DECL_CONSGETVARS(), SCIP_OKAY, SCIPgetSolVal(), SCIPinfoMessage(), SCIPisFeasIntegral(), and TRUE.

Referenced by checkFullOrbitopeSolution(), SCIP_DECL_CONSCHECK(), SCIP_DECL_CONSENFOPS(), and SCIP_DECL_CONSPRINT().

◆ SCIPcreateConsOrbisack()

SCIP_RETCODE SCIPcreateConsOrbisack ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR *const *  vars1,
SCIP_VAR *const *  vars2,
int  nrows,
SCIP_Bool  ispporbisack,
SCIP_Bool  isparttype,
SCIP_Bool  ismodelcons,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a orbisack constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
vars1first column of matrix of variables on which the symmetry acts
vars2second column of matrix of variables on which the symmetry acts
nrowsnumber of rows in variable matrix
ispporbisackwhether the orbisack is a packing/partitioning orbisack
isparttypewhether the orbisack is a partitioning orbisack
ismodelconswhether the orbisack is a model constraint
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 2203 of file cons_orbisack.c.

References consdataCreate(), CONSHDLR_NAME, FALSE, NULL, packingUpgrade(), SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_ORBITOPETYPE_PACKING, SCIP_ORBITOPETYPE_PARTITIONING, SCIP_PLUGINNOTFOUND, SCIPallocBufferArray, SCIPconshdlrGetData(), SCIPcreateCons(), SCIPcreateConsBasicOrbisack(), SCIPcreateConsOrbitope(), SCIPerrorMessage, SCIPfindConshdlr(), SCIPfreeBufferArray, and TRUE.

Referenced by orbisackUpgrade(), SCIP_DECL_CONSCOPY(), SCIPcreateConsBasicOrbisack(), and SCIPincludeConshdlrOrbisack().

◆ SCIPcreateConsBasicOrbisack()

SCIP_RETCODE SCIPcreateConsBasicOrbisack ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR **  vars1,
SCIP_VAR **  vars2,
int  nrows,
SCIP_Bool  ispporbisack,
SCIP_Bool  isparttype,
SCIP_Bool  ismodelcons 
)

creates and captures an orbisack constraint in its most basic variant

All constraint flags set to their default values, which can be set afterwards using SCIPsetConsFLAGNAME() in scip.h.

See also
SCIPcreateConsOrbisack() for the default constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures an orbisack constraint in its most basic variant

All constraint flags set to their default values, which can be set afterwards using SCIPsetConsFLAGNAME() in scip.h.

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
vars1first column of matrix of variables on which the symmetry acts
vars2second column of matrix of variables on which the symmetry acts
nrowsnumber of rows in constraint matrix
ispporbisackwhether the orbisack is a packing/partitioning orbisack
isparttypewhether the orbisack is a partitioning orbisack
ismodelconswhether the orbisack is a model constraint

Definition at line 2310 of file cons_orbisack.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcreateConsOrbisack(), and TRUE.

Referenced by SCIP_DECL_CONSPARSE(), and SCIPcreateConsOrbisack().

◆ SCIPcreateConsOrbitope()

SCIP_RETCODE SCIPcreateConsOrbitope ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR ***  vars,
SCIP_ORBITOPETYPE  orbitopetype,
int  nspcons,
int  nblocks,
SCIP_Bool  usedynamicprop,
SCIP_Bool  mayinteract,
SCIP_Bool  resolveprop,
SCIP_Bool  ismodelcons,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a orbitope constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a orbitope constraint

Precondition
If packing/partitioning orbitopes are used, this constraint handler assumes that constraints which enforce the packing/partitioning constraints are contained in the problem. It does not implement, e.g., separation and propagation of set packing/partitioning constraints, since this would just copy large parts of the code of the setppc constraint handler.
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
varsmatrix of variables on which the symmetry acts
orbitopetypetype of orbitope constraint
nspconsnumber of set partitioning/packing constraints <=> p
nblocksnumber of symmetric variable blocks <=> q
usedynamicpropwhether dynamic propagation should be used
mayinteractwhether symmetries corresponding to orbitope might interact with symmetries handled by other routines
resolvepropshould propagation be resolved?
ismodelconswhether the orbitope is a model constraint
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 3670 of file cons_orbitope.c.

References consdataCreate(), CONSHDLR_NAME, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_ORBITOPETYPE_PACKING, SCIP_ORBITOPETYPE_PARTITIONING, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIPconshdlrGetData(), SCIPcreateCons(), SCIPcreateConsBasicOrbitope(), SCIPerrorMessage, SCIPfindConshdlr(), SCIPgetSubscipDepth(), SCIPinfinity(), SCIPisEQ(), SCIPisInfinity(), SCIPisZero(), SCIPvarGetLbGlobal(), SCIPvarGetNegatedVar(), SCIPvarGetObj(), SCIPvarGetUbGlobal(), SCIPvarIsActive(), SCIPvarIsBinary(), SCIPvarIsNegated(), SCIPwarningMessage(), and strengthenOrbitopeConstraint().

Referenced by addOrbitopeSubgroup(), detectOrbitopes(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSPARSE(), SCIPcreateConsBasicOrbitope(), SCIPcreateConsOrbisack(), and SCIPincludeConshdlrOrbitope().

◆ SCIPcreateConsBasicOrbitope()

SCIP_RETCODE SCIPcreateConsBasicOrbitope ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR ***  vars,
SCIP_ORBITOPETYPE  orbitopetype,
int  nspcons,
int  nblocks,
SCIP_Bool  usedynamicprop,
SCIP_Bool  resolveprop,
SCIP_Bool  ismodelcons,
SCIP_Bool  mayinteract 
)

creates and captures an orbitope constraint in its most basic variant, i. e., with all constraint flags set to their default values, which can be set afterwards using SCIPsetConsFLAGNAME() in scip.h

See also
SCIPcreateConsOrbitope() for the default constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures an orbitope constraint in its most basic variant, i. e., with all constraint flags set to their default values

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
varsmatrix of variables on which the symmetry acts
orbitopetypetype of orbitope constraint
nspconsnumber of set partitioning/packing constraints <=> p
nblocksnumber of symmetric variable blocks <=> q
usedynamicpropwhether dynamic propagation should be used
resolvepropshould propagation be resolved?
ismodelconswhether the orbitope is a model constraint
mayinteractwhether symmetries corresponding to orbitope might interact with symmetries handled by other routines

Definition at line 3798 of file cons_orbitope.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcreateConsOrbitope(), and TRUE.

Referenced by SCIPcreateConsOrbitope().

◆ SCIPcreateConsPseudobooleanWithConss()

SCIP_RETCODE SCIPcreateConsPseudobooleanWithConss ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_CONS lincons,
SCIP_LINEARCONSTYPE  linconstype,
SCIP_CONS **  andconss,
SCIP_Real andcoefs,
int  nandconss,
SCIP_VAR indvar,
SCIP_Real  weight,
SCIP_Bool  issoftcons,
SCIP_VAR intvar,
SCIP_Real  lhs,
SCIP_Real  rhs,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a pseudoboolean constraint, with given linear and and-constraints

Note
intvar must currently be NULL
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
linconsassociated linear constraint
linconstypelinear constraint type of associated linear constraint
andconssassociated and-constraints
andcoefsassociated coefficients of and-constraints
nandconssnumber of associated and-constraints
indvarindicator variable if it's a soft constraint, or NULL
weightweight of the soft constraint, if it is one
issoftconsis this a soft constraint
intvaran artificial variable which was added only for the objective function, if this variable is not NULL this constraint (without this integer variable) describes the objective function
lhsleft hand side of constraint
rhsright hand side of constraint
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are seperated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 9124 of file cons_pseudoboolean.c.

References BMScopyMemoryArray, ConsAndData::cons, consdataCreate(), CONSHDLR_NAME, FALSE, inithashmapandtable(), ConsAndData::isoriginal, ConsAndData::istransformed, ConsAndData::newvars, ConsAndData::nnewvars, ConsAndData::noriguses, NULL, ConsAndData::nuses, ConsAndData::nvars, ConsAndData::origcons, SCIP_Bool, SCIP_CALL, SCIP_INVALIDDATA, SCIP_LINEARCONSTYPE_INVALIDCONS, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPallocBlockMemory, SCIPcalcMemGrowSize(), SCIPcaptureCons(), SCIPcaptureVar(), SCIPconsAddUpgradeLocks(), SCIPconshdlrGetData(), SCIPconsIsTransformed(), SCIPcreateCons(), SCIPcreateConsPseudoboolean(), SCIPduplicateBlockMemoryArray, SCIPensureBlockMemoryArray, SCIPerrorMessage, SCIPfindConshdlr(), SCIPfreeBlockMemory, SCIPfreeBlockMemoryArray, SCIPgetNVarsAnd(), SCIPgetResultantAnd(), SCIPgetVarsAnd(), SCIPhashmapExists(), SCIPhashmapInsert(), SCIPhashtableInsert(), SCIPhashtableRetrieve(), SCIPinfinity(), SCIPisInfinity(), SCIPsortPtr(), SCIPwarningMessage(), ConsAndData::snewvars, ConsAndData::svars, TRUE, and ConsAndData::vars.

Referenced by copyConsPseudoboolean(), and SCIPincludeConshdlrPseudoboolean().

◆ SCIPcreateConsPseudoboolean()

SCIP_RETCODE SCIPcreateConsPseudoboolean ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR **  linvars,
int  nlinvars,
SCIP_Real linvals,
SCIP_VAR ***  terms,
int  nterms,
int *  ntermvars,
SCIP_Real termvals,
SCIP_VAR indvar,
SCIP_Real  weight,
SCIP_Bool  issoftcons,
SCIP_VAR intvar,
SCIP_Real  lhs,
SCIP_Real  rhs,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a pseudoboolean constraint

Note
linear and nonlinear terms can be added using SCIPaddCoefPseudoboolean() and SCIPaddTermPseudoboolean(), respectively
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
intvar must currently be NULL
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
linvarsvariables of the linear part, or NULL
nlinvarsnumber of variables of the linear part
linvalscoefficients of linear part, or NULL
termsnonlinear terms of variables, or NULL
ntermsnumber of terms of variables of nonlinear term
ntermvarsnumber of variables in nonlinear terms, or NULL
termvalscoefficients of nonlinear parts, or NULL
indvarindicator variable if it's a soft constraint, or NULL
weightweight of the soft constraint, if it is one
issoftconsis this a soft constraint
intvaran artificial variable which was added only for the objective function, if this variable is not NULL this constraint (without this integer variable) describes the objective function
lhsleft hand side of constraint
rhsright hand side of constraint
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 9403 of file cons_pseudoboolean.c.

References consdataCreate(), CONSHDLR_NAME, createAndAddAnds(), createAndAddLinearCons(), FALSE, inithashmapandtable(), nterms, NULL, SCIP_Bool, SCIP_CALL, SCIP_INVALIDDATA, SCIP_LINEARCONSTYPE_INVALIDCONS, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_Real, SCIPallocBufferArray, SCIPconshdlrGetData(), SCIPcreateCons(), SCIPcreateConsBasicPseudoboolean(), SCIPerrorMessage, SCIPfindConshdlr(), SCIPfreeBufferArray, SCIPgetResultantAnd(), SCIPinfinity(), and SCIPisInfinity().

Referenced by findAggregation(), readConstraints(), SCIPcreateConsBasicPseudoboolean(), SCIPcreateConsPseudobooleanWithConss(), and setObjective().

◆ SCIPcreateConsBasicPseudoboolean()

SCIP_RETCODE SCIPcreateConsBasicPseudoboolean ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR **  linvars,
int  nlinvars,
SCIP_Real linvals,
SCIP_VAR ***  terms,
int  nterms,
int *  ntermvars,
SCIP_Real termvals,
SCIP_VAR indvar,
SCIP_Real  weight,
SCIP_Bool  issoftcons,
SCIP_VAR intvar,
SCIP_Real  lhs,
SCIP_Real  rhs 
)

creates and captures a pseudoboolean constraint in its most basic variant, i. e., with all constraint flags set to their default values, which can be set afterwards using SCIPsetConsFLAGNAME() in scip.h

See also
SCIPcreateConsPseudoboolean() for the default constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
intvar must currently be NULL

creates and captures a pseudoboolean constraint in its most basic variant, i. e., with all constraint flags set to their default values

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
intvar must currently be NULL
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
linvarsvariables of the linear part, or NULL
nlinvarsnumber of variables of the linear part
linvalscoefficients of linear part, or NULL
termsnonlinear terms of variables, or NULL
ntermsnumber of terms of variables of nonlinear term
ntermvarsnumber of variables in nonlinear terms, or NULL
termvalscoefficients of nonlinear parts, or NULL
indvarindicator variable if it's a soft constraint, or NULL
weightweight of the soft constraint, if it is one
issoftconsis this a soft constraint
intvara artificial variable which was added only for the objective function, if this variable is not NULL this constraint (without this integer variable) describes the objective function
lhsleft hand side of constraint
rhsright hand side of constraint

Definition at line 9559 of file cons_pseudoboolean.c.

References FALSE, nterms, SCIP_CALL, SCIP_OKAY, SCIPaddCoefPseudoboolean(), SCIPcreateConsPseudoboolean(), and TRUE.

Referenced by SCIPcreateConsPseudoboolean().

◆ SCIPaddCoefPseudoboolean()

SCIP_RETCODE SCIPaddCoefPseudoboolean ( SCIP *const  scip,
SCIP_CONS *const  cons,
SCIP_VAR *const  var,
SCIP_Real const  val 
)

adds linear term pseudo boolean constraint (if it is not zero)

Note
you can only add a coefficient if the special type of linear constraint won't changed

adds a variable to the pseudo boolean constraint (if it is not zero)

Note
you can only add a coefficient if the special type of linear constraint won't changed
Parameters
scipSCIP data structure
consconstraint data
varvariable of constraint entry
valcoefficient of constraint entry

Definition at line 9594 of file cons_pseudoboolean.c.

References CONSHDLR_NAME, FALSE, NULL, SCIP_CALL, SCIP_INVALIDDATA, SCIP_LINEARCONSTYPE_INVALIDCONS, SCIP_LINEARCONSTYPE_KNAPSACK, SCIP_LINEARCONSTYPE_LINEAR, SCIP_LINEARCONSTYPE_LOGICOR, SCIP_LINEARCONSTYPE_SETPPC, SCIP_Longint, SCIP_OKAY, SCIPABORT, SCIPaddCoefKnapsack(), SCIPaddCoefLinear(), SCIPaddCoefLogicor(), SCIPaddCoefSetppc(), SCIPaddTermPseudoboolean(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, SCIPisEQ(), SCIPisIntegral(), SCIPisPositive(), and SCIPisZero().

Referenced by SCIPcreateConsBasicPseudoboolean().

◆ SCIPaddTermPseudoboolean()

SCIP_RETCODE SCIPaddTermPseudoboolean ( SCIP *const  scip,
SCIP_CONS *const  cons,
SCIP_VAR **const  vars,
int const  nvars,
SCIP_Real const  val 
)

adds nonlinear term to pseudo boolean constraint (if it is not zero)

Note
you can only add a coefficient if the special type of linear constraint won't changed

adds nonlinear term to pseudo boolean constraint (if it is not zero)

Note
you can only add a coefficient if the special type of linear constraint won't changed
Parameters
scipSCIP data structure
conspseudoboolean constraint
varsvariables of the nonlinear term
nvarsnumber of variables of the nonlinear term
valcoefficient of constraint entry

Definition at line 9671 of file cons_pseudoboolean.c.

References addCoefTerm(), CONSHDLR_NAME, NULL, ConsAndData::nvars, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPABORT, SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetIndVarPseudoboolean().

Referenced by SCIPaddCoefPseudoboolean().

◆ SCIPgetIndVarPseudoboolean()

SCIP_VAR* SCIPgetIndVarPseudoboolean ( SCIP *const  scip,
SCIP_CONS *const  cons 
)

gets indicator variable of pseudoboolean constraint, or NULL if there is no

Parameters
scipSCIP data structure
consconstraint data

Definition at line 9696 of file cons_pseudoboolean.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetLinearConsPseudoboolean().

Referenced by SCIPaddTermPseudoboolean(), and writeOpbConstraints().

◆ SCIPgetLinearConsPseudoboolean()

SCIP_CONS* SCIPgetLinearConsPseudoboolean ( SCIP *const  scip,
SCIP_CONS *const  cons 
)

gets linear constraint of pseudoboolean constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 9720 of file cons_pseudoboolean.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetLinearConsTypePseudoboolean().

Referenced by SCIPgetIndVarPseudoboolean(), and writeOpbConstraints().

◆ SCIPgetLinearConsTypePseudoboolean()

SCIP_LINEARCONSTYPE SCIPgetLinearConsTypePseudoboolean ( SCIP *const  scip,
SCIP_CONS *const  cons 
)

gets type of linear constraint of pseudoboolean constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 9744 of file cons_pseudoboolean.c.

References CONSHDLR_NAME, NULL, SCIP_LINEARCONSTYPE_INVALIDCONS, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetNLinVarsWithoutAndPseudoboolean().

Referenced by SCIPgetLinearConsPseudoboolean().

◆ SCIPgetNLinVarsWithoutAndPseudoboolean()

int SCIPgetNLinVarsWithoutAndPseudoboolean ( SCIP *const  scip,
SCIP_CONS *const  cons 
)

gets number of linear variables without artificial terms variables of pseudoboolean constraint

Parameters
scipSCIP data structure
conspseudoboolean constraint

Definition at line 9768 of file cons_pseudoboolean.c.

References checkConsConsistency, CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetLinDatasWithoutAndPseudoboolean().

Referenced by SCIPgetLinearConsTypePseudoboolean(), and writeOpbConstraints().

◆ SCIPgetLinDatasWithoutAndPseudoboolean()

SCIP_RETCODE SCIPgetLinDatasWithoutAndPseudoboolean ( SCIP *const  scip,
SCIP_CONS *const  cons,
SCIP_VAR **const  linvars,
SCIP_Real *const  lincoefs,
int *const  nlinvars 
)

gets linear constraint of pseudoboolean constraint

Parameters
scipSCIP data structure
conspseudoboolean constraint
linvarsarray to store and-constraints
lincoefsarray to store and-coefficients
nlinvarspointer to store the required array size for and-constraints, have to be initialized with size of given array

Definition at line 9794 of file cons_pseudoboolean.c.

References checkConsConsistency, CONSHDLR_NAME, getLinearConsNVars(), getLinearConsVarsData(), getLinVarsAndAndRess(), NULL, ConsAndData::nvars, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIP_Real, SCIPABORT, SCIPallocBufferArray, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, SCIPfreeBufferArray, SCIPgetAndDatasPseudoboolean(), and ConsAndData::vars.

Referenced by SCIPgetNLinVarsWithoutAndPseudoboolean(), and writeOpbConstraints().

◆ SCIPgetAndDatasPseudoboolean()

SCIP_RETCODE SCIPgetAndDatasPseudoboolean ( SCIP *const  scip,
SCIP_CONS *const  cons,
SCIP_CONS **const  andconss,
SCIP_Real *const  andcoefs,
int *const  nandconss 
)

gets and-constraints of pseudoboolean constraint

Parameters
scipSCIP data structure
conspseudoboolean constraint
andconssarray to store and-constraints
andcoefsarray to store and-coefficients
nandconsspointer to store the required array size for and-constraints, have to be initialized with size of given array

Definition at line 9854 of file cons_pseudoboolean.c.

References checkConsConsistency, CONSHDLR_NAME, NULL, SCIP_Bool, SCIP_INVALIDDATA, SCIP_OKAY, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPconsIsOriginal(), SCIPerrorMessage, SCIPgetNAndsPseudoboolean(), and TRUE.

Referenced by SCIPgetLinDatasWithoutAndPseudoboolean(), and writeOpbConstraints().

◆ SCIPgetNAndsPseudoboolean()

int SCIPgetNAndsPseudoboolean ( SCIP *const  scip,
SCIP_CONS *const  cons 
)

gets number of and constraints of pseudoboolean constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 9914 of file cons_pseudoboolean.c.

References checkConsConsistency, CONSHDLR_NAME, NULL, SCIPABORT, SCIPchgLhsPseudoboolean(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by SCIPgetAndDatasPseudoboolean(), and writeOpbConstraints().

◆ SCIPchgLhsPseudoboolean()

SCIP_RETCODE SCIPchgLhsPseudoboolean ( SCIP *const  scip,
SCIP_CONS *const  cons,
SCIP_Real const  lhs 
)

changes left hand side of pseudoboolean constraint

Note
you can only change the left hand side if the special type of linear constraint won't changed

changes left hand side of pseudoboolean constraint

Note
you can only change the left hand side if the special type of linear constraint won't changed
Parameters
scipSCIP data structure
consconstraint data
lhsnew left hand side

Definition at line 9946 of file cons_pseudoboolean.c.

References checkConsConsistency, chgLhs(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_INVALIDDATA, SCIP_LINEARCONSTYPE_INVALIDCONS, SCIP_LINEARCONSTYPE_KNAPSACK, SCIP_LINEARCONSTYPE_LINEAR, SCIP_LINEARCONSTYPE_LOGICOR, SCIP_LINEARCONSTYPE_SETPPC, SCIP_OKAY, SCIPchgRhsPseudoboolean(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by SCIPgetNAndsPseudoboolean().

◆ SCIPchgRhsPseudoboolean()

SCIP_RETCODE SCIPchgRhsPseudoboolean ( SCIP *const  scip,
SCIP_CONS *const  cons,
SCIP_Real const  rhs 
)

changes right hand side of pseudoboolean constraint

Note
you can only change the right hand side if the special type of linear constraint won't changed

changes right hand side of pseudoboolean constraint

Note
you can only change the right hand side if the special type of linear constraint won't changed
Parameters
scipSCIP data structure
consconstraint data
rhsnew right hand side

Definition at line 9997 of file cons_pseudoboolean.c.

References checkConsConsistency, chgRhs(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_INVALIDDATA, SCIP_LINEARCONSTYPE_INVALIDCONS, SCIP_LINEARCONSTYPE_KNAPSACK, SCIP_LINEARCONSTYPE_LINEAR, SCIP_LINEARCONSTYPE_LOGICOR, SCIP_LINEARCONSTYPE_SETPPC, SCIP_OKAY, SCIP_Real, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetLhsPseudoboolean().

Referenced by SCIPchgLhsPseudoboolean().

◆ SCIPgetLhsPseudoboolean()

SCIP_Real SCIPgetLhsPseudoboolean ( SCIP *const  scip,
SCIP_CONS *const  cons 
)

get left hand side of pseudoboolean constraint

Parameters
scipSCIP data structure
conspseudoboolean constraint

Definition at line 10039 of file cons_pseudoboolean.c.

References checkConsConsistency, CONSHDLR_NAME, NULL, SCIP_INVALID, SCIP_Real, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetRhsPseudoboolean().

Referenced by SCIPchgRhsPseudoboolean(), and writeOpbConstraints().

◆ SCIPgetRhsPseudoboolean()

SCIP_Real SCIPgetRhsPseudoboolean ( SCIP *const  scip,
SCIP_CONS *const  cons 
)

get right hand side of pseudoboolean constraint

Parameters
scipSCIP data structure
conspseudoboolean constraint

Definition at line 10064 of file cons_pseudoboolean.c.

References checkConsConsistency, CONSHDLR_NAME, NULL, SCIP_INVALID, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by SCIPgetLhsPseudoboolean(), and writeOpbConstraints().

◆ SCIPcreateConsQuadratic()

SCIP_RETCODE SCIPcreateConsQuadratic ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nlinvars,
SCIP_VAR **  linvars,
SCIP_Real lincoefs,
int  nquadterms,
SCIP_VAR **  quadvars1,
SCIP_VAR **  quadvars2,
SCIP_Real quadcoeffs,
SCIP_Real  lhs,
SCIP_Real  rhs,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable 
)

Creates and captures a quadratic nonlinear constraint.

The constraint should be given in the form

\[ \ell \leq \sum_{i=1}^n b_i x_i + \sum_{j=1}^m a_j y_j z_j \leq u, \]

where \(x_i = y_j = z_k\) is possible.

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Deprecated:
Use SCIPcreateConsQuadraticNonlinear() instead.

Creates and captures a quadratic nonlinear constraint.

The constraint should be given in the form

\[ \ell \leq \sum_{i=1}^n b_i x_i + \sum_{j=1}^m a_j y_j z_j \leq u, \]

where \(x_i = y_j = z_k\) is possible.

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Deprecated:
Use SCIPcreateConsQuadraticNonlinear() instead.
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nlinvarsnumber of linear terms (n)
linvarsvariables in linear part (x_i) or NULL if nlinvars == 0
lincoefscoefficients of variables in linear part (b_i) or NULL if nlinvars == 0
nquadtermsnumber of quadratic terms (m)
quadvars1array with first variables in quadratic terms (y_j) or NULL if nquadterms == 0
quadvars2array with second variables in quadratic terms (z_j) or NULL if nquadterms == 0
quadcoeffsarray with coefficients of quadratic terms (a_j) or NULL if nquadterms == 0
lhsleft hand side of quadratic equation (l)
rhsright hand side of quadratic equation (u)
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.

Definition at line 51 of file cons_quadratic.c.

References SCIP_CALL, SCIP_OKAY, and SCIPcreateConsQuadraticNonlinear().

◆ SCIPcreateConsBasicQuadratic()

SCIP_RETCODE SCIPcreateConsBasicQuadratic ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nlinvars,
SCIP_VAR **  linvars,
SCIP_Real lincoefs,
int  nquadterms,
SCIP_VAR **  quadvars1,
SCIP_VAR **  quadvars2,
SCIP_Real quadcoefs,
SCIP_Real  lhs,
SCIP_Real  rhs 
)

creates and captures a quadratic nonlinear constraint in its most basic variant, i.e., with all constraint flags set to their default values, which can be set afterwards using SCIPsetConsFLAGNAME()

The constraint should be given in the form

\[ \ell \leq \sum_{i=1}^n b_i x_i + \sum_{j=1}^m a_j y_jz_j \leq u, \]

where \(x_i = y_j = z_k\) is possible.

See also
SCIPcreateConsQuadratic() for the default constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Deprecated:
Use SCIPcreateConsBasicQuadraticNonlinear instead.

creates and captures a quadratic nonlinear constraint in its most basic variant, i.e., with all constraint flags set to their default values, which can be set afterwards using SCIPsetConsFLAGNAME()

The constraint should be given in the form

\[ \ell \leq \sum_{i=1}^n b_i x_i + \sum_{j=1}^m a_j y_jz_j \leq u, \]

where \(x_i = y_j = z_k\) is possible.

See also
SCIPcreateConsQuadratic() for the default constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Deprecated:
Use SCIPcreateConsBasicQuadraticNonlinear instead.
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nlinvarsnumber of linear terms (n)
linvarsarray with variables in linear part (x_i)
lincoefsarray with coefficients of variables in linear part (b_i)
nquadtermsnumber of quadratic terms (m)
quadvars1array with first variables in quadratic terms (y_j)
quadvars2array with second variables in quadratic terms (z_j)
quadcoefsarray with coefficients of quadratic terms (a_j)
lhsleft hand side of quadratic equation (ell)
rhsright hand side of quadratic equation (u)

Definition at line 108 of file cons_quadratic.c.

References SCIP_CALL, SCIP_OKAY, and SCIPcreateConsBasicQuadraticNonlinear().

◆ SCIPaddConstantQuadratic()

void SCIPaddConstantQuadratic ( SCIP scip,
SCIP_CONS cons,
SCIP_Real  constant 
)

Adds a constant to the constraint function, that is, subtracts a constant from both sides

Deprecated:
Use SCIPchgLhsNonlinear() and SCIPchgRhsNonlinear() instead.

Adds a constant to the constraint function, that is, subtracts a constant from both sides

Deprecated:
Use SCIPchgLhsNonlinear() and SCIPchgRhsNonlinear() instead.
Parameters
scipSCIP data structure
consconstraint
constantconstant to subtract from both sides

Definition at line 132 of file cons_quadratic.c.

References NULL, SCIP_CALL_ABORT, SCIP_Real, SCIPchgLhsNonlinear(), SCIPchgRhsNonlinear(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPgetLhsNonlinear(), SCIPgetRhsNonlinear(), and SCIPisInfinity().

◆ SCIPaddLinearVarQuadratic()

SCIP_RETCODE SCIPaddLinearVarQuadratic ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var,
SCIP_Real  coef 
)

Adds a linear variable with coefficient to a quadratic constraint.

Deprecated:
Use SCIPaddLinearVarNonlinear() instead.

Adds a linear variable with coefficient to a quadratic constraint.

Deprecated:
Use SCIPaddLinearVarNonlinear() instead.
Parameters
scipSCIP data structure
consconstraint
varvariable
coefcoefficient of variable

Definition at line 160 of file cons_quadratic.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPaddLinearVarNonlinear(), SCIPconsGetHdlr(), and SCIPconshdlrGetName().

◆ SCIPaddQuadVarQuadratic()

SCIP_RETCODE SCIPaddQuadVarQuadratic ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var,
SCIP_Real  lincoef,
SCIP_Real  sqrcoef 
)

Adds a quadratic variable with linear and square coefficient to a quadratic constraint.

Deprecated:
Use SCIPaddLinearVarNonlinear() and SCIPaddExprNonlinear() instead.

Adds a quadratic variable with linear and square coefficient to a quadratic constraint.

Deprecated:
Use SCIPaddLinearVarNonlinear() and SCIPaddExprNonlinear() instead.
Parameters
scipSCIP data structure
consconstraint
varvariable
lincoeflinear coefficient of variable
sqrcoefsquare coefficient of variable

Definition at line 179 of file cons_quadratic.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPaddExprNonlinear(), SCIPaddLinearVarNonlinear(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPcreateExprPow(), SCIPcreateExprVar(), and SCIPreleaseExpr().

◆ SCIPaddQuadVarLinearCoefQuadratic()

SCIP_RETCODE SCIPaddQuadVarLinearCoefQuadratic ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var,
SCIP_Real  coef 
)

Adds a linear coefficient for a quadratic variable.

Variable will be added with square coefficient 0.0 if not existing yet.

Deprecated:
Use SCIPaddLinearVarNonlinear() instead.

Adds a linear coefficient for a quadratic variable.

Variable will be added with square coefficient 0.0 if not existing yet.

Deprecated:
Use SCIPaddLinearVarNonlinear() instead.
Parameters
scipSCIP data structure
consconstraint
varvariable
coefvalue to add to linear coefficient of variable

Definition at line 218 of file cons_quadratic.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPaddLinearVarNonlinear(), SCIPconsGetHdlr(), and SCIPconshdlrGetName().

◆ SCIPaddSquareCoefQuadratic()

SCIP_RETCODE SCIPaddSquareCoefQuadratic ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var,
SCIP_Real  coef 
)

Adds a square coefficient for a quadratic variable.

Variable will be added with linear coefficient 0.0 if not existing yet.

Deprecated:
Use SCIPaddExprNonlinear() instead.

Adds a square coefficient for a quadratic variable.

Variable will be added with linear coefficient 0.0 if not existing yet.

Deprecated:
Use SCIPaddExprNonlinear() instead.
Parameters
scipSCIP data structure
consconstraint
varvariable
coefvalue to add to square coefficient of variable

Definition at line 239 of file cons_quadratic.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPaddExprNonlinear(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPcreateExprPow(), SCIPcreateExprVar(), and SCIPreleaseExpr().

◆ SCIPaddBilinTermQuadratic()

SCIP_RETCODE SCIPaddBilinTermQuadratic ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var1,
SCIP_VAR var2,
SCIP_Real  coef 
)

Adds a bilinear term to a quadratic constraint.

Variables will be added with linear and square coefficient 0.0 if not existing yet. If variables are equal, only the square coefficient of the variable is updated.

Deprecated:
Use SCIPaddExprNonlinear() instead.

Adds a bilinear term to a quadratic constraint.

Variables will be added with linear and square coefficient 0.0 if not existing yet. If variables are equal, only the square coefficient of the variable is updated.

Deprecated:
Use SCIPaddExprNonlinear() instead.
Parameters
scipSCIP data structure
consconstraint
var1first variable
var2second variable
coefcoefficient of bilinear term

Definition at line 270 of file cons_quadratic.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPaddExprNonlinear(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPcreateExprProduct(), SCIPcreateExprVar(), and SCIPreleaseExpr().

◆ SCIPgetNlRowQuadratic()

SCIP_RETCODE SCIPgetNlRowQuadratic ( SCIP scip,
SCIP_CONS cons,
SCIP_NLROW **  nlrow 
)

Gets the quadratic constraint as a nonlinear row representation.

Deprecated:
Use SCIPgetNlRowNonlinear() instead.

Gets the quadratic constraint as a nonlinear row representation.

Deprecated:
Use SCIPgetNlRowNonlinear() instead.
Parameters
scipSCIP data structure
consconstraint
nlrowpointer to store nonlinear row

Definition at line 301 of file cons_quadratic.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPgetNlRowNonlinear().

◆ SCIPchgLhsQuadratic()

SCIP_RETCODE SCIPchgLhsQuadratic ( SCIP scip,
SCIP_CONS cons,
SCIP_Real  lhs 
)

sets the left hand side of a quadratic constraint

Note
This method may only be called during problem creation stage for an original constraint.
Deprecated:
Use SCIPchgLhsNonlinear() instead.

sets the left hand side of a quadratic constraint

Note
This method may only be called during problem creation stage for an original constraint.
Deprecated:
Use SCIPchgLhsNonlinear() instead.
Parameters
scipSCIP data structure
consconstraint data
lhsnew left hand side

Definition at line 321 of file cons_quadratic.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPchgLhsNonlinear(), SCIPconsGetHdlr(), and SCIPconshdlrGetName().

◆ SCIPchgRhsQuadratic()

SCIP_RETCODE SCIPchgRhsQuadratic ( SCIP scip,
SCIP_CONS cons,
SCIP_Real  rhs 
)

sets the right hand side of a quadratic constraint

Note
This method may only be called during problem creation stage for an original constraint.
Deprecated:
Use SCIPchgRhsNonlinear() instead.

sets the right hand side of a quadratic constraint

Note
This method may only be called during problem creation stage for an original constraint.
Deprecated:
Use SCIPchgRhsNonlinear() instead.
Parameters
scipSCIP data structure
consconstraint data
rhsnew right hand side

Definition at line 341 of file cons_quadratic.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPchgRhsNonlinear(), SCIPconsGetHdlr(), and SCIPconshdlrGetName().

◆ SCIPcreateConsSetpart()

SCIP_RETCODE SCIPcreateConsSetpart ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a set partitioning constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsarray with variables of constraint entries
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 9214 of file cons_setppc.c.

References createConsSetppc(), SCIP_SETPPCTYPE_PARTITIONING, and SCIPcreateConsBasicSetpart().

Referenced by cliquePresolve(), consdataLinearize(), createAndAddLinearCons(), createMipCpFormulation(), createProbQP(), createProbSimplified(), createProbSimplifiedTest(), extractGates(), and processRealBoundChg().

◆ SCIPcreateConsBasicSetpart()

SCIP_RETCODE SCIPcreateConsBasicSetpart ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars 
)

creates and captures a set partitioning constraint in its most basic variant, i. e., with all constraint flags set to their default values, which can be set afterwards using SCIPsetConsFLAGNAME() in scip.h

See also
SCIPcreateConsSetpart() for the default constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a set partitioning constraint with all constraint flags set to their default values

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsarray with variables of constraint entries

Definition at line 9254 of file cons_setppc.c.

Referenced by createCipFormulation(), createMipFormulation(), SCIP_DECL_SOLVECUMULATIVE(), SCIPcreateConsSetpart(), and setupProblem().

◆ SCIPcreateConsSetpack()

SCIP_RETCODE SCIPcreateConsSetpack ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a set packing constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsarray with variables of constraint entries
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 9272 of file cons_setppc.c.

References createConsSetppc(), SCIP_SETPPCTYPE_PACKING, and SCIPcreateConsBasicSetpack().

Referenced by addCliques(), addExtraCliques(), cliquePresolve(), consdataLinearize(), createAndAddLinearCons(), deleteRedundantVars(), detectRedundantVars(), dualWeightsTightening(), fixDeleteOrUpgradeCons(), presolRoundConsSOS1(), removeConstraintsDueToNegCliques(), tightenWeights(), upgradeCons(), and upgradeConss().

◆ SCIPcreateConsBasicSetpack()

SCIP_RETCODE SCIPcreateConsBasicSetpack ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars 
)

creates and captures a set packing constraint in its most basic variant, i. e., with all constraint flags set to their default values, which can be set afterwards using SCIPsetConsFLAGNAME() in scip.h

See also
SCIPcreateConsSetpack() for the default constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a set packing constraint with all constraint flags set to their default values

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsarray with variables of constraint entries

Definition at line 9312 of file cons_setppc.c.

Referenced by createSetPackingCons(), and SCIPcreateConsSetpack().

◆ SCIPcreateConsSetcover()

SCIP_RETCODE SCIPcreateConsSetcover ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a set covering constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsarray with variables of constraint entries
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 9330 of file cons_setppc.c.

References createConsSetppc(), SCIP_SETPPCTYPE_COVERING, and SCIPcreateConsBasicSetcover().

Referenced by COLORprobSetUpArrayOfCons(), createAndAddLinearCons(), CUTOFF_CONSTRAINT(), forbidCover(), forbidFixation(), processNlRow(), and readCnf().

◆ SCIPcreateConsBasicSetcover()

SCIP_RETCODE SCIPcreateConsBasicSetcover ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars 
)

creates and captures a set packing constraint in its most basic variant, i. e., with all constraint flags set to their default values, which can be set afterwards using SCIPsetConsFLAGNAME() in scip.h

See also
SCIPcreateConsSetpack() for the default constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a set covering constraint with all constraint flags set to their default values

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsarray with variables of constraint entries

Definition at line 9370 of file cons_setppc.c.

Referenced by SCIPcreateConsSetcover(), and SCIPprobdataCreate().

◆ SCIPaddCoefSetppc()

◆ SCIPgetNVarsSetppc()

◆ SCIPgetVarsSetppc()

◆ SCIPgetTypeSetppc()

◆ SCIPgetDualsolSetppc()

SCIP_Real SCIPgetDualsolSetppc ( SCIP scip,
SCIP_CONS cons 
)

gets the dual solution of the set partitioning / packing / covering constraint in the current LP

Parameters
scipSCIP data structure
consconstraint data

Definition at line 9476 of file cons_setppc.c.

References NULL, SCIP_INVALID, SCIP_Real, SCIPABORT, SCIPconsGetData(), SCIPerrorMessage, SCIPgetDualfarkasSetppc(), and SCIProwGetDualsol().

Referenced by initPricing(), SCIP_DECL_PRICERREDCOST(), SCIPconsGetDualsol(), and SCIPgetTypeSetppc().

◆ SCIPgetDualfarkasSetppc()

SCIP_Real SCIPgetDualfarkasSetppc ( SCIP scip,
SCIP_CONS cons 
)

gets the dual Farkas value of the set partitioning / packing / covering constraint in the current infeasible LP

Parameters
scipSCIP data structure
consconstraint data

Definition at line 9502 of file cons_setppc.c.

References NULL, SCIP_INVALID, SCIPABORT, SCIPconsGetData(), SCIPerrorMessage, SCIPgetRowSetppc(), and SCIProwGetDualfarkas().

Referenced by SCIPconsGetDualfarkas(), and SCIPgetDualsolSetppc().

◆ SCIPgetRowSetppc()

SCIP_ROW* SCIPgetRowSetppc ( SCIP scip,
SCIP_CONS cons 
)

returns the linear relaxation of the given set partitioning / packing / covering constraint; may return NULL if no LP row was yet created; the user must not modify the row!

Parameters
scipSCIP data structure
consconstraint data

Definition at line 9530 of file cons_setppc.c.

References NULL, SCIPABORT, SCIPconsGetData(), SCIPerrorMessage, and SCIPgetNFixedonesSetppc().

Referenced by SCIPconsGetRow(), and SCIPgetDualfarkasSetppc().

◆ SCIPgetNFixedonesSetppc()

int SCIPgetNFixedonesSetppc ( SCIP scip,
SCIP_CONS cons 
)

returns current number of variables fixed to one in the constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 9553 of file cons_setppc.c.

References NULL, SCIPABORT, SCIPconsGetData(), SCIPerrorMessage, and SCIPgetNFixedzerosSetppc().

Referenced by addFixedVarsConss(), initPricing(), SCIP_DECL_PRICERREDCOST(), and SCIPgetRowSetppc().

◆ SCIPgetNFixedzerosSetppc()

int SCIPgetNFixedzerosSetppc ( SCIP scip,
SCIP_CONS cons 
)

returns current number of variables fixed to zero in the constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 9577 of file cons_setppc.c.

References NULL, SCIP_Bool, SCIPABORT, SCIPcleanupConssSetppc(), SCIPconsGetData(), and SCIPerrorMessage.

Referenced by SCIPgetNFixedonesSetppc().

◆ SCIPcleanupConssSetppc()

SCIP_RETCODE SCIPcleanupConssSetppc ( SCIP scip,
SCIP_Bool  onlychecked,
SCIP_Bool infeasible,
int *  naddconss,
int *  ndelconss,
int *  nchgcoefs,
int *  nfixedvars 
)

cleans up (multi-)aggregations and fixings from setppc constraints

Parameters
scipSCIP data structure
onlycheckedshould only checked constraints be cleaned up?
infeasiblepointer to return whether problem was detected to be infeasible
naddconsspointer to count number of added (linear) constraints
ndelconsspointer to count number of deleted (setppc) constraints
nchgcoefspointer to count number of changed coefficients
nfixedvarspointer to count number of fixed variables

Definition at line 9600 of file cons_setppc.c.

References applyFixings(), CONSHDLR_NAME, FALSE, mergeMultiples(), NULL, SCIP_CALL, SCIP_OKAY, SCIPconshdlrGetCheckConss(), SCIPconshdlrGetConss(), SCIPconshdlrGetNActiveConss(), SCIPconshdlrGetNCheckConss(), SCIPconsIsDeleted(), and SCIPfindConshdlr().

Referenced by SCIPgetNFixedzerosSetppc(), and SCIPmatrixCreate().

◆ SCIPcreateConsSOC()

SCIP_RETCODE SCIPcreateConsSOC ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Real coefs,
SCIP_Real offsets,
SCIP_Real  constant,
SCIP_VAR rhsvar,
SCIP_Real  rhscoeff,
SCIP_Real  rhsoffset,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable 
)

creates and captures a second order cone nonlinear constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Deprecated:
Use SCIPcreateConsBasicSOCNonlinear() instead

creates and captures a second order cone nonlinear constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Deprecated:
Use SCIPcreateConsNonlinear() instead
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables on left hand side of constraint (n)
varsarray with variables on left hand side (x_i)
coefsarray with coefficients of left hand side variables (alpha_i), or NULL if all 1.0
offsetsarray with offsets of variables (beta_i), or NULL if all 0.0
constantconstant on left hand side (gamma)
rhsvarvariable on right hand side of constraint (x_{n+1})
rhscoeffcoefficient of variable on right hand side (alpha_{n+1})
rhsoffsetoffset of variable on right hand side (beta_{n+1})
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.

Definition at line 106 of file cons_soc.c.

References createSOCExpression(), SCIP_CALL, SCIP_OKAY, SCIPcreateConsNonlinear(), SCIPinfinity(), and SCIPreleaseExpr().

◆ SCIPcreateConsBasicSOC()

SCIP_RETCODE SCIPcreateConsBasicSOC ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Real coefs,
SCIP_Real offsets,
SCIP_Real  constant,
SCIP_VAR rhsvar,
SCIP_Real  rhscoeff,
SCIP_Real  rhsoffset 
)

creates and captures a second order cone nonlinear constraint in its most basic variant, i. e., with all constraint flags set to their default values, which can be set afterwards using SCIPsetConsFLAGNAME()

See also
SCIPcreateConsSOC() for the default constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Deprecated:
Use SCIPcreateConsBasicSOCNonlinear() instead

creates and captures a second order cone nonlinear constraint in its most basic variant, i. e., with all constraint flags set to their default values, which can be set afterwards using SCIPsetConsFLAGNAME()

See also
SCIPcreateConsSOC() for the default constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Deprecated:
Use SCIPcreateConsBasicNonlinear() instead
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables on left hand side of constraint (n)
varsarray with variables on left hand side (x_i)
coefsarray with coefficients of left hand side variables (alpha_i), or NULL if all 1.0
offsetsarray with offsets of variables (beta_i), or NULL if all 0.0
constantconstant on left hand side (gamma)
rhsvarvariable on right hand side of constraint (x_{n+1})
rhscoeffcoefficient of variable on right hand side (alpha_{n+1})
rhsoffsetoffset of variable on right hand side (beta_{n+1})

Definition at line 162 of file cons_soc.c.

References createSOCExpression(), SCIP_CALL, SCIP_OKAY, SCIPcreateConsBasicNonlinear(), SCIPinfinity(), and SCIPreleaseExpr().

◆ SCIPgetNlRowSOC()

SCIP_RETCODE SCIPgetNlRowSOC ( SCIP scip,
SCIP_CONS cons,
SCIP_NLROW **  nlrow 
)

Gets the SOC constraint as a nonlinear row representation.

Deprecated:
Use SCIPgetNlRowNonlinear() instead.

Gets the SOC constraint as a nonlinear row representation.

Deprecated:
Use SCIPgetNlRowNonlinear() instead.
Parameters
scipSCIP data structure
consconstraint
nlrowpointer to store nonlinear row

Definition at line 191 of file cons_soc.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPgetNlRowNonlinear().

◆ SCIPcreateConsSOS1()

SCIP_RETCODE SCIPcreateConsSOS1 ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Real weights,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures an SOS1 constraint

We set the constraint to not be modifable. If the weights are non NULL, the variables are ordered according to these weights (in ascending order).

Note
The constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons().

creates and captures a SOS1 constraint

We set the constraint to not be modifable. If the weights are non NULL, the variables are ordered according to these weights (in ascending order).

Note
The constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons().
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsarray with variables of constraint entries
weightsweights determining the variable order, or NULL if natural order should be used
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 10385 of file cons_sos1.c.

References CONSHDLR_NAME, FALSE, handleNewVariableSOS1(), NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_STAGE_TRANSFORMED, SCIPallocBlockMemory, SCIPconshdlrGetData(), SCIPconsIsTransformed(), SCIPcreateCons(), SCIPcreateConsBasicSOS1(), SCIPduplicateBlockMemoryArray, SCIPerrorMessage, SCIPfindConshdlr(), SCIPgetStage(), SCIPgetTransformedVar(), SCIPmarkDoNotMultaggrVar(), SCIPsortRealPtr(), and SCIPvarIsTransformed().

Referenced by addBranchingComplementaritiesSOS1(), extensionOperatorSOS1(), performImplicationGraphAnalysis(), readSOS(), readSos(), readSOScons(), and SCIPcreateConsBasicSOS1().

◆ SCIPcreateConsBasicSOS1()

SCIP_RETCODE SCIPcreateConsBasicSOS1 ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Real weights 
)

creates and captures an SOS1 constraint in its most basic variant, i. e., with all constraint flags set to their default values, which can be set afterwards using SCIPsetConsFLAGNAME() in scip.h

See also
SCIPcreateConsSOS1() for the default constraint flag configuration
Warning
Do NOT set the constraint to be modifiable manually, because this might lead to wrong results as the variable array will not be resorted
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a SOS1 constraint with all constraint flags set to their default values.

Warning
Do NOT set the constraint to be modifiable manually, because this might lead to wrong results as the variable array will not be resorted
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsarray with variables of constraint entries
weightsweights determining the variable order, or NULL if natural order should be used

Definition at line 10506 of file cons_sos1.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPaddVarSOS1(), SCIPcreateConsSOS1(), and TRUE.

Referenced by createKKTComplementarityBinary(), createKKTComplementarityBounds(), createKKTComplementarityLinear(), AMPLProblemHandler::EndInput(), and SCIPcreateConsSOS1().

◆ SCIPaddVarSOS1()

SCIP_RETCODE SCIPaddVarSOS1 ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var,
SCIP_Real  weight 
)

adds variable to SOS1 constraint, the position is determined by the given weight

Parameters
scipSCIP data structure
consconstraint
varvariable to add to the constraint
weightweight determining position of variable

Definition at line 10522 of file cons_sos1.c.

References addVarSOS1(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPappendVarSOS1(), SCIPconsGetHdlr(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPdebugMsg, SCIPerrorMessage, and SCIPvarGetName().

Referenced by createKKTComplementarityBinary(), createKKTComplementarityBounds(), createKKTComplementarityLinear(), readSOS(), readSos(), readSOScons(), and SCIPcreateConsBasicSOS1().

◆ SCIPappendVarSOS1()

SCIP_RETCODE SCIPappendVarSOS1 ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var 
)

appends variable to SOS1 constraint

Parameters
scipSCIP data structure
consconstraint
varvariable to add to the constraint

Definition at line 10556 of file cons_sos1.c.

Referenced by SCIPaddVarSOS1().

◆ SCIPgetNVarsSOS1()

int SCIPgetNVarsSOS1 ( SCIP scip,
SCIP_CONS cons 
)

gets number of variables in SOS1 constraint

Parameters
scipSCIP data structure
consconstraint

Definition at line 10589 of file cons_sos1.c.

Referenced by SCIPwriteGms(), SCIPwriteLp(), and SCIPwriteMps().

◆ SCIPgetVarsSOS1()

SCIP_VAR** SCIPgetVarsSOS1 ( SCIP scip,
SCIP_CONS cons 
)

gets array of variables in SOS1 constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 10614 of file cons_sos1.c.

Referenced by SCIPwriteGms(), SCIPwriteLp(), and SCIPwriteMps().

◆ SCIPgetWeightsSOS1()

SCIP_Real* SCIPgetWeightsSOS1 ( SCIP scip,
SCIP_CONS cons 
)

gets array of weights in SOS1 constraint (or NULL if not existent)

Parameters
scipSCIP data structure
consconstraint data

Definition at line 10639 of file cons_sos1.c.

Referenced by SCIPgetConsVals(), SCIPwriteLp(), and SCIPwriteMps().

◆ SCIPgetConflictgraphSOS1()

SCIP_DIGRAPH* SCIPgetConflictgraphSOS1 ( SCIP_CONSHDLR conshdlr)

gets conflict graph of SOS1 constraints (or NULL if not existent)

Note
The conflict graph is globally valid; local changes are not taken into account.
Parameters
conshdlrSOS1 constraint handler

Definition at line 10667 of file cons_sos1.c.

Referenced by getDiveBdChgsSOS1conflictgraph(), makeSOS1conflictgraphFeasible(), SCIP_DECL_SEPAEXECLP(), and sepaBoundInequalitiesFromGraph().

◆ SCIPgetNSOS1Vars()

int SCIPgetNSOS1Vars ( SCIP_CONSHDLR conshdlr)

gets number of problem variables that are part of the SOS1 conflict graph

Parameters
conshdlrSOS1 constraint handler

Definition at line 10689 of file cons_sos1.c.

Referenced by getDiveBdChgsSOS1conflictgraph(), makeSOS1conflictgraphFeasible(), SCIP_DECL_SEPAEXECLP(), SCIPperformGenericDivingAlgorithm(), and sepaBoundInequalitiesFromGraph().

◆ SCIPvarIsSOS1()

SCIP_Bool SCIPvarIsSOS1 ( SCIP_CONSHDLR conshdlr,
SCIP_VAR var 
)

returns whether variable is part of the SOS1 conflict graph

Parameters
conshdlrSOS1 constraint handler
varvariable

Definition at line 10711 of file cons_sos1.c.

◆ SCIPvarGetNodeSOS1()

int SCIPvarGetNodeSOS1 ( SCIP_CONSHDLR conshdlr,
SCIP_VAR var 
)

returns node of variable in the conflict graph or -1 if variable is not part of the SOS1 conflict graph

returns SOS1 index of variable or -1 if variable is not part of the SOS1 conflict graph

Parameters
conshdlrSOS1 constraint handler
varvariable

Definition at line 10735 of file cons_sos1.c.

Referenced by markNeighborsMWISHeuristic().

◆ SCIPnodeGetVarSOS1()

◆ SCIPmakeSOS1sFeasible()

SCIP_RETCODE SCIPmakeSOS1sFeasible ( SCIP scip,
SCIP_CONSHDLR conshdlr,
SCIP_SOL sol,
SCIP_Bool changed,
SCIP_Bool success 
)

based on solution values of the variables, fixes variables to zero to turn all SOS1 constraints feasible

Parameters
scipSCIP pointer
conshdlrSOS1 constraint handler
solsolution
changedpointer to store whether the solution has been changed
successpointer to store whether SOS1 constraints have been turned feasible and solution was good enough

Definition at line 10791 of file cons_sos1.c.

References CONSHDLR_NAME, FALSE, makeSOS1conflictgraphFeasible(), makeSOS1constraintsFeasible(), NULL, SCIP_Bool, SCIP_CALL, SCIP_OBJSENSE_MAXIMIZE, SCIP_OKAY, SCIP_PARAMETERWRONGVAL, SCIP_Real, SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPconshdlrGetNConss(), SCIPerrorMessage, SCIPgetObjsense(), SCIPgetSolOrigObj(), SCIPgetUpperbound(), SCIPisLT(), and TRUE.

Referenced by SCIPperformGenericDivingAlgorithm().

◆ SCIPcreateConsSOS2()

SCIP_RETCODE SCIPcreateConsSOS2 ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Real weights,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures an SOS2 constraint

We set the constraint to not be modifable. If the weights are non NULL, the variables are ordered according to these weights (in ascending order).

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a SOS2 constraint

We set the constraint to not be modifable. If the weights are non NULL, the variables are ordered according to these weights (in ascending order).

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsarray with variables of constraint entries
weightsweights determining the variable order, or NULL if natural order should be used
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 2360 of file cons_sos2.c.

References CONSHDLR_NAME, FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPallocBlockMemory, SCIPcreateCons(), SCIPcreateConsBasicSOS2(), SCIPduplicateBlockMemoryArray, SCIPerrorMessage, SCIPfindConshdlr(), and SCIPsortRealPtr().

Referenced by readSOS(), readSos(), readSOScons(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSPARSE(), SCIPcreateConsBasicSOS2(), and SCIPincludeConshdlrSOS2().

◆ SCIPcreateConsBasicSOS2()

SCIP_RETCODE SCIPcreateConsBasicSOS2 ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int  nvars,
SCIP_VAR **  vars,
SCIP_Real weights 
)

creates and captures a SOS2 constraint with all constraint flags set to their default values.

Warning
Do NOT set the constraint to be modifiable manually, because this might lead to wrong results as the variable array will not be resorted
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
nvarsnumber of variables in the constraint
varsarray with variables of constraint entries
weightsweights determining the variable order, or NULL if natural order should be used

Definition at line 2443 of file cons_sos2.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPaddVarSOS2(), SCIPcreateConsSOS2(), and TRUE.

Referenced by AMPLProblemHandler::EndInput(), and SCIPcreateConsSOS2().

◆ SCIPaddVarSOS2()

SCIP_RETCODE SCIPaddVarSOS2 ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var,
SCIP_Real  weight 
)

adds variable to SOS2 constraint, the position is determined by the given weight

Parameters
scipSCIP data structure
consconstraint
varvariable to add to the constraint
weightweight determining position of variable

Definition at line 2459 of file cons_sos2.c.

References addVarSOS2(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPappendVarSOS2(), SCIPconsGetHdlr(), SCIPconsGetName(), SCIPconshdlrGetName(), SCIPdebugMsg, SCIPerrorMessage, and SCIPvarGetName().

Referenced by readSOS(), readSos(), readSOScons(), SCIP_DECL_CONSPARSE(), and SCIPcreateConsBasicSOS2().

◆ SCIPappendVarSOS2()

SCIP_RETCODE SCIPappendVarSOS2 ( SCIP scip,
SCIP_CONS cons,
SCIP_VAR var 
)

appends variable to SOS2 constraint

Parameters
scipSCIP data structure
consconstraint
varvariable to add to the constraint

Definition at line 2485 of file cons_sos2.c.

References appendVarSOS2(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_INVALIDDATA, SCIP_OKAY, SCIPconsGetHdlr(), SCIPconsGetName(), SCIPconshdlrGetName(), SCIPdebugMsg, SCIPerrorMessage, SCIPgetNVarsSOS2(), and SCIPvarGetName().

Referenced by SCIPaddVarSOS2().

◆ SCIPgetNVarsSOS2()

int SCIPgetNVarsSOS2 ( SCIP scip,
SCIP_CONS cons 
)

gets number of variables in SOS2 constraint

Parameters
scipSCIP data structure
consconstraint

Definition at line 2510 of file cons_sos2.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetVarsSOS2().

Referenced by SCIPappendVarSOS2(), SCIPwriteGms(), SCIPwriteLp(), and SCIPwriteMps().

◆ SCIPgetVarsSOS2()

SCIP_VAR** SCIPgetVarsSOS2 ( SCIP scip,
SCIP_CONS cons 
)

gets array of variables in SOS2 constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 2535 of file cons_sos2.c.

References CONSHDLR_NAME, NULL, SCIP_Real, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetWeightsSOS2().

Referenced by SCIPgetNVarsSOS2(), SCIPwriteGms(), SCIPwriteLp(), and SCIPwriteMps().

◆ SCIPgetWeightsSOS2()

SCIP_Real* SCIPgetWeightsSOS2 ( SCIP scip,
SCIP_CONS cons 
)

gets array of weights in SOS2 constraint (or NULL if not existent)

Parameters
scipSCIP data structure
consconstraint data

Definition at line 2560 of file cons_sos2.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by SCIPgetConsVals(), SCIPgetVarsSOS2(), SCIPwriteLp(), and SCIPwriteMps().

◆ SCIPcreateConsSuperindicator()

SCIP_RETCODE SCIPcreateConsSuperindicator ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR binvar,
SCIP_CONS slackcons,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a superindicator constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
binvarpointer to the indicator constraint
slackconsconstraint corresponding to the handled constraint
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 1999 of file cons_superindicator.c.

References consdataCreateSuperindicator(), CONSHDLR_NAME, FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_INVALIDCALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPconsGetHdlr(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPcreateCons(), SCIPcreateConsBasicSuperindicator(), SCIPerrorMessage, SCIPfindConshdlr(), and SCIPwarningMessage().

Referenced by SCIPcreateConsBasicSuperindicator(), SCIPincludeConshdlrSuperindicator(), and SCIPtransformMinUC().

◆ SCIPcreateConsBasicSuperindicator()

SCIP_RETCODE SCIPcreateConsBasicSuperindicator ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR binvar,
SCIP_CONS slackcons 
)

creates and captures a superindicator constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsSuperindicator(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsSuperindicator() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
binvarpointer to the indicator constraint
slackconsconstraint corresponding to the handled constraint

Definition at line 2106 of file cons_superindicator.c.

References FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPcreateConsSuperindicator(), SCIPgetBinaryVarSuperindicator(), and TRUE.

Referenced by SCIPcreateConsSuperindicator().

◆ SCIPgetBinaryVarSuperindicator()

SCIP_VAR* SCIPgetBinaryVarSuperindicator ( SCIP_CONS cons)

gets binary variable corresponding to the superindicator constraint

gets binary variable corresponding to the general indicator constraint

Parameters
conssuperindicator constraint

Definition at line 2128 of file cons_superindicator.c.

References CONSHDLR_NAME, NULL, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPgetSlackConsSuperindicator().

Referenced by SCIPcreateConsBasicSuperindicator().

◆ SCIPgetSlackConsSuperindicator()

SCIP_CONS* SCIPgetSlackConsSuperindicator ( SCIP_CONS cons)

gets the slack constraint corresponding to the superindicator constraint

gets the slack constraint corresponding to the general indicator constraint

Parameters
conssuperindicator constraint

Definition at line 2140 of file cons_superindicator.c.

References CONSHDLR_NAME, NULL, SCIP_Bool, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPtransformMinUC().

Referenced by SCIPgetBinaryVarSuperindicator().

◆ SCIPtransformMinUC()

◆ SCIP_DECL_DIALOGEXEC() [4/4]

SCIP_DECL_DIALOGEXEC ( SCIPdialogExecChangeMinUC  )

dialog execution method for the SCIPtransformMinUC() command

dialog execution method for the SCIPtransformMinUC() method

Definition at line 2295 of file cons_superindicator.c.

Referenced by SCIPtransformMinUC().

◆ SCIPcreateSymbreakCons()

SCIP_RETCODE SCIPcreateSymbreakCons ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int *  perm,
SCIP_VAR **  vars,
int  nvars,
SCIP_Bool  ismodelcons,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates a symmetry breaking constraint

Depending on the given permutation, either an orbisack or symresack constraint is created.

Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
permpermutation
varsvariables
nvarsnumber of variables in vars array
ismodelconswhether the added constraint is a model constraint
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 1734 of file cons_symresack.c.

References FALSE, NULL, orbisackUpgrade(), SCIP_Bool, SCIP_CALL, SCIP_DECL_CONSHDLRCOPY(), SCIP_OKAY, and SCIPcreateConsSymresack().

Referenced by addSymresackConss(), detectAndHandleSubgroups(), and orbisackUpgrade().

◆ SCIPcreateConsSymresack()

SCIP_RETCODE SCIPcreateConsSymresack ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int *  perm,
SCIP_VAR **  vars,
int  nvars,
SCIP_Bool  ismodelcons,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a symresack constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a symresack constraint

In a presolving step, we check whether the permutation acts only on binary points. Otherwise, we eliminate the non-binary variables from the permutation.

Note
The constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons().
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
permpermutation
varsvariables
nvarsnumber of variables in vars array
ismodelconswhether the symresack is a model constraint
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 3122 of file cons_symresack.c.

References consdataCreate(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPcreateCons(), SCIPcreateConsBasicSymresack(), SCIPerrorMessage, and SCIPfindConshdlr().

Referenced by SCIP_DECL_CONSCOPY(), SCIPcreateConsBasicSymresack(), SCIPcreateSymbreakCons(), and SCIPincludeConshdlrSymresack().

◆ SCIPcreateConsBasicSymresack()

SCIP_RETCODE SCIPcreateConsBasicSymresack ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
int *  perm,
SCIP_VAR **  vars,
int  nvars,
SCIP_Bool  ismodelcons 
)

creates and captures a symresack constraint in its most basic variant, i.e., with all constraint flags set to their default values, which can be set afterwards using SCIPsetConsFLAGNAME() in scip.h

See also
SCIPcreateConsSymresack() for the default constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a symresack constraint in its most basic variant, i.e., with all constraint flags set to their default values

In a presolving step, we remove all fixed points and cycles that act on non-binary variables of the permutation

Note
The constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons().
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
permpermutation
varsvariables
nvarsnumber of variables in vars array
ismodelconswhether the symresack is a model constraint

Definition at line 3187 of file cons_symresack.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcreateConsSymresack(), and TRUE.

Referenced by SCIP_DECL_CONSPARSE(), and SCIPcreateConsSymresack().

◆ SCIPcreateConsVarbound()

SCIP_RETCODE SCIPcreateConsVarbound ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR var,
SCIP_VAR vbdvar,
SCIP_Real  vbdcoef,
SCIP_Real  lhs,
SCIP_Real  rhs,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures a variable bound constraint: lhs <= x + c*y <= rhs

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
varvariable x that has variable bound
vbdvarbinary, integer or implicit integer bounding variable y
vbdcoefcoefficient c of bounding variable y
lhsleft hand side of variable bound inequality
rhsright hand side of variable bound inequality
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 5273 of file cons_varbound.c.

References catchEvents(), consdataCreate(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPconshdlrGetData(), SCIPcreateCons(), SCIPcreateConsBasicVarbound(), SCIPerrorMessage, SCIPfindConshdlr(), and SCIPisTransformed().

Referenced by createPrecedenceCons(), createVarUbs(), SCIP_DECL_CONSINITLP(), SCIP_DECL_CONSPARSE(), SCIP_DECL_LINCONSUPGD(), SCIPcreateConsBasicVarbound(), SCIPcreateSchedulingProblem(), and SCIPincludeConshdlrVarbound().

◆ SCIPcreateConsBasicVarbound()

SCIP_RETCODE SCIPcreateConsBasicVarbound ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_VAR var,
SCIP_VAR vbdvar,
SCIP_Real  vbdcoef,
SCIP_Real  lhs,
SCIP_Real  rhs 
)

creates and captures a varbound constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsVarbound(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsVarbound() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a variable bound constraint: lhs <= x + c*y <= rhs with all constraint flags set to their default values

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
varvariable x that has variable bound
vbdvarbinary, integer or implicit integer bounding variable y
vbdcoefcoefficient c of bounding variable y
lhsleft hand side of variable bound inequality
rhsright hand side of variable bound inequality

Definition at line 5343 of file cons_varbound.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPcreateConsVarbound(), SCIPgetLhsVarbound(), and TRUE.

Referenced by addBranchingDecisionConss(), applyRepair(), createVarboundCons(), getBinaryProductExprDo(), reformulateFactorizedBinaryQuadratic(), and SCIPcreateConsVarbound().

◆ SCIPgetLhsVarbound()

◆ SCIPgetRhsVarbound()

◆ SCIPgetVarVarbound()

◆ SCIPgetVbdvarVarbound()

◆ SCIPgetVbdcoefVarbound()

◆ SCIPgetDualsolVarbound()

SCIP_Real SCIPgetDualsolVarbound ( SCIP scip,
SCIP_CONS cons 
)

gets the dual solution of the variable bound constraint in the current LP

Parameters
scipSCIP data structure
consconstraint data

Definition at line 5476 of file cons_varbound.c.

References CONSHDLR_NAME, NULL, SCIP_INVALID, SCIP_Real, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, SCIPgetDualfarkasVarbound(), and SCIProwGetDualsol().

Referenced by SCIPconsGetDualsol(), and SCIPgetVbdcoefVarbound().

◆ SCIPgetDualfarkasVarbound()

SCIP_Real SCIPgetDualfarkasVarbound ( SCIP scip,
SCIP_CONS cons 
)

gets the dual Farkas value of the variable bound constraint in the current infeasible LP

Parameters
scipSCIP data structure
consconstraint data

Definition at line 5502 of file cons_varbound.c.

References CONSHDLR_NAME, NULL, SCIP_INVALID, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, SCIPgetRowVarbound(), and SCIProwGetDualfarkas().

Referenced by SCIPconsGetDualfarkas(), and SCIPgetDualsolVarbound().

◆ SCIPgetRowVarbound()

SCIP_ROW* SCIPgetRowVarbound ( SCIP scip,
SCIP_CONS cons 
)

returns the linear relaxation of the given variable bound constraint; may return NULL if no LP row was yet created; the user must not modify the row!

Parameters
scipSCIP data structure
consconstraint data

Definition at line 5530 of file cons_varbound.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPcleanupConssVarbound(), SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by SCIPconsGetRow(), and SCIPgetDualfarkasVarbound().

◆ SCIPcleanupConssVarbound()

SCIP_RETCODE SCIPcleanupConssVarbound ( SCIP scip,
SCIP_Bool  onlychecked,
SCIP_Bool infeasible,
int *  naddconss,
int *  ndelconss,
int *  nchgbds 
)

cleans up (multi-)aggregations and fixings from varbound constraints

Parameters
scipSCIP data structure
onlycheckedshould only checked constraints be cleaned up?
infeasiblepointer to return whether the problem was detected to be infeasible
naddconsspointer to count number of added (linear) constraints
ndelconsspointer to count number of deleted (varbound) constraints
nchgbdspointer to count number of bound changes

Definition at line 5553 of file cons_varbound.c.

References applyFixings(), CONSHDLR_NAME, FALSE, NULL, SCIP_CALL, SCIP_OKAY, SCIPconshdlrGetCheckConss(), SCIPconshdlrGetConss(), SCIPconshdlrGetData(), SCIPconshdlrGetNActiveConss(), SCIPconshdlrGetNCheckConss(), and SCIPfindConshdlr().

Referenced by SCIPgetRowVarbound(), and SCIPmatrixCreate().

◆ SCIPcreateConsXor()

SCIP_RETCODE SCIPcreateConsXor ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_Bool  rhs,
int  nvars,
SCIP_VAR **  vars,
SCIP_Bool  initial,
SCIP_Bool  separate,
SCIP_Bool  enforce,
SCIP_Bool  check,
SCIP_Bool  propagate,
SCIP_Bool  local,
SCIP_Bool  modifiable,
SCIP_Bool  dynamic,
SCIP_Bool  removable,
SCIP_Bool  stickingatnode 
)

creates and captures an xor constraint

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a xor constraint x_0 xor ... xor x_{k-1} = rhs

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
rhsright hand side of the constraint
nvarsnumber of operator variables in the constraint
varsarray with operator variables of constraint
initialshould the LP relaxation of constraint be in the initial LP? Usually set to TRUE. Set to FALSE for 'lazy constraints'.
separateshould the constraint be separated during LP processing? Usually set to TRUE.
enforceshould the constraint be enforced during node processing? TRUE for model constraints, FALSE for additional, redundant constraints.
checkshould the constraint be checked for feasibility? TRUE for model constraints, FALSE for additional, redundant constraints.
propagateshould the constraint be propagated during node processing? Usually set to TRUE.
localis constraint only valid locally? Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints.
modifiableis constraint modifiable (subject to column generation)? Usually set to FALSE. In column generation applications, set to TRUE if pricing adds coefficients to this constraint.
dynamicis constraint subject to aging? Usually set to FALSE. Set to TRUE for own cuts which are separated as constraints.
removableshould the relaxation be removed from the LP due to aging or cleanup? Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'.
stickingatnodeshould the constraint always be kept at the node where it was added, even if it may be moved to a more global node? Usually set to FALSE. Set to TRUE to for constraints that represent node data.

Definition at line 5854 of file cons_xor.c.

References consdataCreate(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPcreateCons(), SCIPcreateConsBasicXor(), SCIPerrorMessage, and SCIPfindConshdlr().

Referenced by CREATE_CONSTRAINT(), SCIP_DECL_CONSPARSE(), SCIPcreateConsBasicXor(), SCIPincludeConshdlrXor(), and tryUpgradingXor().

◆ SCIPcreateConsBasicXor()

SCIP_RETCODE SCIPcreateConsBasicXor ( SCIP scip,
SCIP_CONS **  cons,
const char *  name,
SCIP_Bool  rhs,
int  nvars,
SCIP_VAR **  vars 
)

creates and captures an xor constraint in its most basic version, i. e., all constraint flags are set to their basic value as explained for the method SCIPcreateConsXor(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h

See also
SCIPcreateConsXor() for information about the basic constraint flag configuration
Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()

creates and captures a xor constraint x_0 xor ... xor x_{k-1} = rhs with all constraint flags set to their default values

Note
the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons()
Parameters
scipSCIP data structure
conspointer to hold the created constraint
namename of constraint
rhsright hand side of the constraint
nvarsnumber of operator variables in the constraint
varsarray with operator variables of constraint

Definition at line 5912 of file cons_xor.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIPcreateConsXor(), SCIPgetNVarsXor(), and TRUE.

Referenced by createMIP(), and SCIPcreateConsXor().

◆ SCIPgetNVarsXor()

int SCIPgetNVarsXor ( SCIP scip,
SCIP_CONS cons 
)

gets number of variables in xor constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 5928 of file cons_xor.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetVarsXor().

Referenced by computeSymmetryGroup(), and SCIPcreateConsBasicXor().

◆ SCIPgetVarsXor()

SCIP_VAR** SCIPgetVarsXor ( SCIP scip,
SCIP_CONS cons 
)

gets array of variables in xor constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 5951 of file cons_xor.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetIntVarXor().

Referenced by computeSymmetryGroup(), and SCIPgetNVarsXor().

◆ SCIPgetIntVarXor()

SCIP_VAR* SCIPgetIntVarXor ( SCIP scip,
SCIP_CONS cons 
)

gets integer variable in xor constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 5974 of file cons_xor.c.

References CONSHDLR_NAME, NULL, SCIP_Bool, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), SCIPerrorMessage, and SCIPgetRhsXor().

Referenced by computeSymmetryGroup(), and SCIPgetVarsXor().

◆ SCIPgetRhsXor()

SCIP_Bool SCIPgetRhsXor ( SCIP scip,
SCIP_CONS cons 
)

gets the right hand side of the xor constraint

Parameters
scipSCIP data structure
consconstraint data

Definition at line 5997 of file cons_xor.c.

References CONSHDLR_NAME, NULL, SCIPABORT, SCIPconsGetData(), SCIPconsGetHdlr(), SCIPconshdlrGetName(), and SCIPerrorMessage.

Referenced by computeSymmetryGroup(), SCIP_DECL_CONSCOPY(), and SCIPgetIntVarXor().