Scippy

SCIP

Solving Constraint Integer Programs

heur_lpface.c File Reference

Detailed Description

lpface primal heuristic that searches the optimal LP face inside a sub-MIP

Author
Gregor Hendel

Definition in file heur_lpface.c.

#include <assert.h>
#include <string.h>
#include <stdio.h>
#include "scip/scip.h"
#include "scip/scipdefplugins.h"
#include "scip/cons_linear.h"
#include "scip/heur_lpface.h"
#include "scip/pub_misc.h"

Go to the source code of this file.

Macros

#define HEUR_NAME   "lpface"
 
#define HEUR_DESC   "LNS heuristic that searches the optimal LP face inside a sub-MIP"
 
#define HEUR_DISPCHAR   '_'
 
#define HEUR_PRIORITY   -1104000
 
#define HEUR_FREQ   15
 
#define HEUR_FREQOFS   0
 
#define HEUR_MAXDEPTH   -1
 
#define HEUR_TIMING   SCIP_HEURTIMING_AFTERLPNODE
 
#define HEUR_USESSUBSCIP   TRUE
 
#define DEFAULT_MAXNODES   5000LL
 
#define DEFAULT_MINNODES   50LL
 
#define DEFAULT_MINFIXINGRATE   0.1
 
#define DEFAULT_NODESOFS   200LL
 
#define DEFAULT_NODESQUOT   0.1
 
#define DEFAULT_LPLIMFAC   2.0
 
#define DEFAULT_USELPROWS   TRUE
 
#define DEFAULT_COPYCUTS   TRUE
 
#define DEFAULT_DUALBASISEQUATIONS   FALSE
 
#define DEFAULT_KEEPSUBSCIP   FALSE
 
#define DEFAULT_MINPATHLEN   5
 
#define EVENTHDLR_NAME   "Lpface"
 
#define EVENTHDLR_DESC   "LP event handler for " HEUR_NAME " heuristic"
 
#define heurExitLpface   NULL
 

Typedefs

typedef struct SubscipData SUBSCIPDATA
 

Functions

static SCIP_RETCODE fixVariables (SCIP *scip, SCIP *subscip, SCIP_VAR **subvars, SCIP_HEURDATA *heurdata, SCIP_Bool *success)
 
static SCIP_RETCODE createRows (SCIP *scip, SCIP *subscip, SCIP_VAR **subvars, SCIP_Bool dualbasisequations)
 
static SCIP_RETCODE setupSubproblem (SCIP *scip, SCIP *subscip, SCIP_VAR **subvars, SCIP_HEURDATA *heurdata, SCIP_Bool *success)
 
static SCIP_RETCODE createNewSol (SCIP *scip, SCIP *subscip, SCIP_VAR **subvars, SCIP_HEUR *heur, SCIP_SOL *subsol, int *solindex, SCIP_Bool *success)
 
static void updateFailureStatistic (SCIP *scip, SCIP_HEURDATA *heurdata)
 
static SCIP_Longint calcNodeLimit (SCIP *scip, SCIP_HEUR *heur, SCIP_HEURDATA *heurdata)
 
static SCIP_RETCODE setSubscipLimits (SCIP *scip, SCIP *subscip, SCIP_HEUR *heur, SCIP_HEURDATA *heurdata, SCIP_Bool *success)
 
static SCIP_RETCODE setSubscipParameters (SCIP *scip, SCIP *subscip)
 
static void subscipdataReset (SUBSCIPDATA *subscipdata)
 
static SCIP_RETCODE subscipdataFreeSubscip (SCIP *scip, SUBSCIPDATA *subscipdata)
 
static SCIP_RETCODE subscipdataCopySubscip (SCIP *scip, SUBSCIPDATA *subscipdata, SCIP *subscip, SCIP_VAR **subvars, int nvars)
 
static SCIP_RETCODE changeSubvariableObjective (SCIP *scip, SCIP *subscip, SCIP_VAR *var, SCIP_VAR *subvar, SCIP_HEURDATA *heurdata)
 
static SCIP_DECL_EVENTEXEC (eventExecLpface)
 
static SCIP_RETCODE setupSubscipLpface (SCIP *scip, SCIP *subscip, SCIP_HEURDATA *heurdata, SCIP_VAR **subvars, SCIP_VAR **vars, SCIP_RESULT *result, SCIP_Bool *keepthisscip, int nvars)
 
static SCIP_RETCODE solveSubscipLpface (SCIP *scip, SCIP *subscip, SCIP_HEUR *heur, SCIP_HEURDATA *heurdata, SCIP_VAR **subvars, SCIP_RESULT *result, SCIP_Real focusnodelb, SCIP_Bool *keepthisscip)
 
static SCIP_DECL_HEURCOPY (heurCopyLpface)
 
static SCIP_DECL_HEURFREE (heurFreeLpface)
 
static SCIP_DECL_HEURINIT (heurInitLpface)
 
static SCIP_DECL_HEURINITSOL (heurInitsolLpface)
 
static SCIP_DECL_HEUREXITSOL (heurExitsolLpface)
 
static SCIP_DECL_HEUREXEC (heurExecLpface)
 
SCIP_RETCODE SCIPincludeHeurLpface (SCIP *scip)
 

Macro Definition Documentation

◆ HEUR_NAME

#define HEUR_NAME   "lpface"

Definition at line 32 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface(), and solveSubscipLpface().

◆ HEUR_DESC

#define HEUR_DESC   "LNS heuristic that searches the optimal LP face inside a sub-MIP"

Definition at line 33 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ HEUR_DISPCHAR

#define HEUR_DISPCHAR   '_'

Definition at line 34 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ HEUR_PRIORITY

#define HEUR_PRIORITY   -1104000

Definition at line 35 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ HEUR_FREQ

#define HEUR_FREQ   15

Definition at line 36 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ HEUR_FREQOFS

#define HEUR_FREQOFS   0

Definition at line 37 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ HEUR_MAXDEPTH

#define HEUR_MAXDEPTH   -1

Definition at line 38 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ HEUR_TIMING

#define HEUR_TIMING   SCIP_HEURTIMING_AFTERLPNODE

Definition at line 39 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ HEUR_USESSUBSCIP

#define HEUR_USESSUBSCIP   TRUE

does the heuristic use a secondary SCIP instance?

Definition at line 40 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ DEFAULT_MAXNODES

#define DEFAULT_MAXNODES   5000LL

maximum number of nodes to regard in the subproblem

Definition at line 42 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ DEFAULT_MINNODES

#define DEFAULT_MINNODES   50LL

minimum number of nodes to regard in the subproblem

Definition at line 43 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ DEFAULT_MINFIXINGRATE

#define DEFAULT_MINFIXINGRATE   0.1

required percentage of fixed integer variables in sub-MIP to run

Definition at line 44 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ DEFAULT_NODESOFS

#define DEFAULT_NODESOFS   200LL

number of nodes added to the contingent of the total nodes

Definition at line 45 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ DEFAULT_NODESQUOT

#define DEFAULT_NODESQUOT   0.1

subproblem nodes in relation to nodes of the original problem

Definition at line 46 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ DEFAULT_LPLIMFAC

#define DEFAULT_LPLIMFAC   2.0

factor by which the limit on the number of LP depends on the node limit

Definition at line 47 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ DEFAULT_USELPROWS

#define DEFAULT_USELPROWS   TRUE

should subproblem be created out of the rows in the LP rows, otherwise, the copy constructors of the constraints handlers are used

Definition at line 48 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ DEFAULT_COPYCUTS

#define DEFAULT_COPYCUTS   TRUE

if uselprows == FALSE, should all active cuts from cutpool be copied to constraints in subproblem?

Definition at line 51 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ DEFAULT_DUALBASISEQUATIONS

#define DEFAULT_DUALBASISEQUATIONS   FALSE

should the dually nonbasic rows be turned into equations?

Definition at line 54 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ DEFAULT_KEEPSUBSCIP

#define DEFAULT_KEEPSUBSCIP   FALSE

should the heuristic continue solving the same sub-SCIP?

Definition at line 55 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ DEFAULT_MINPATHLEN

#define DEFAULT_MINPATHLEN   5

the minimum active search tree path length along which the lower bound hasn't changed before heuristic becomes active

Definition at line 56 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

◆ EVENTHDLR_NAME

#define EVENTHDLR_NAME   "Lpface"

Definition at line 60 of file heur_lpface.c.

Referenced by solveSubscipLpface().

◆ EVENTHDLR_DESC

#define EVENTHDLR_DESC   "LP event handler for " HEUR_NAME " heuristic"

Definition at line 61 of file heur_lpface.c.

Referenced by solveSubscipLpface().

◆ heurExitLpface

#define heurExitLpface   NULL

Definition at line 1116 of file heur_lpface.c.

Referenced by SCIPincludeHeurLpface().

Typedef Documentation

◆ SUBSCIPDATA

typedef struct SubscipData SUBSCIPDATA

Definition at line 75 of file heur_lpface.c.

Function Documentation

◆ fixVariables()

static SCIP_RETCODE fixVariables ( SCIP scip,
SCIP subscip,
SCIP_VAR **  subvars,
SCIP_HEURDATA heurdata,
SCIP_Bool success 
)
static

fixes variables of the subproblem considering their reduced costs

Parameters
sciporiginal SCIP data structure
subscipSCIP data structure for the subproblem
subvarsthe variables of the subproblem
heurdataprimal heuristic data
successpointer to store whether enough integer variables were fixed

Definition at line 115 of file heur_lpface.c.

References createRows(), MAX, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIP_VARSTATUS_COLUMN, SCIPchgVarLbGlobal(), SCIPchgVarUbGlobal(), SCIPdebugMsg, SCIPgetColRedcost(), SCIPgetSolVal(), SCIPgetVarsData(), SCIPisDualfeasZero(), SCIPisFeasEQ(), SCIPisInfinity(), SCIPvarGetCol(), SCIPvarGetLbGlobal(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetObj(), SCIPvarGetStatus(), SCIPvarGetUbGlobal(), SCIPvarGetUbLocal(), and SCIPvarIsIntegral().

Referenced by setupSubproblem().

◆ createRows()

static SCIP_RETCODE createRows ( SCIP scip,
SCIP subscip,
SCIP_VAR **  subvars,
SCIP_Bool  dualbasisequations 
)
static

creates the rows of the subproblem

Parameters
sciporiginal SCIP data structure
subscipSCIP data structure for the subproblem
subvarsthe variables of the subproblem
dualbasisequationsshould the dually nonbasic rows be turned into equations?

Definition at line 199 of file heur_lpface.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPaddCons(), SCIPallocBufferArray, SCIPcolGetVar(), SCIPcreateConsLinear(), SCIPfreeBufferArray, SCIPgetLPRowsData(), SCIPgetRowActivity(), SCIPisDualfeasZero(), SCIPisFeasEQ(), SCIPisInfinity(), SCIPreleaseCons(), SCIProwGetCols(), SCIProwGetConstant(), SCIProwGetDualsol(), SCIProwGetLhs(), SCIProwGetName(), SCIProwGetNNonz(), SCIProwGetRhs(), SCIProwGetVals(), SCIProwIsLocal(), SCIPvarGetProbindex(), setupSubproblem(), and TRUE.

Referenced by fixVariables(), and setupSubproblem().

◆ setupSubproblem()

static SCIP_RETCODE setupSubproblem ( SCIP scip,
SCIP subscip,
SCIP_VAR **  subvars,
SCIP_HEURDATA heurdata,
SCIP_Bool success 
)
static

creates the LP face subproblem by fixing nonbasic variables with nonzero reduced costs

Parameters
sciporiginal SCIP data structure
subscipSCIP data structure for the subproblem
subvarsthe variables of the subproblem
heurdataprimal heuristic data
successpointer to store whether the problem was created successfully

Definition at line 284 of file heur_lpface.c.

References createNewSol(), createRows(), FALSE, fixVariables(), SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPaddCoefLinear(), SCIPaddCons(), SCIPcreateConsLinear(), SCIPgetLowerbound(), SCIPgetNObjVars(), SCIPgetNVars(), SCIPgetVars(), SCIPisZero(), SCIPreleaseCons(), SCIPvarGetObj(), and TRUE.

Referenced by createRows(), and setupSubscipLpface().

◆ createNewSol()

static SCIP_RETCODE createNewSol ( SCIP scip,
SCIP subscip,
SCIP_VAR **  subvars,
SCIP_HEUR heur,
SCIP_SOL subsol,
int *  solindex,
SCIP_Bool success 
)
static

creates a new solution for the original problem by copying the solution of the subproblem

Parameters
sciporiginal SCIP data structure
subscipSCIP structure of the subproblem
subvarsthe variables of the subproblem
heurlpface heuristic structure
subsolsolution of the subproblem
solindexpointer to store index of the solution
successpointer to store whether new solution was found or not

Definition at line 339 of file heur_lpface.c.

References FALSE, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_Real, SCIPallocBufferArray, SCIPcreateSol(), SCIPdebugMsg, SCIPfreeBufferArray, SCIPgetNOrigVars(), SCIPgetSolTransObj(), SCIPgetSolVals(), SCIPgetVarsData(), SCIPretransformObj(), SCIPsetSolVals(), SCIPsolGetIndex(), SCIPtrySolFree(), TRUE, and updateFailureStatistic().

Referenced by setupSubproblem(), and solveSubscipLpface().

◆ updateFailureStatistic()

static void updateFailureStatistic ( SCIP scip,
SCIP_HEURDATA heurdata 
)
static

updates heurdata after an unsuccessful run of lpface

Parameters
sciporiginal SCIP data structure
heurdataprimal heuristic data

Definition at line 402 of file heur_lpface.c.

References calcNodeLimit(), SCIP_Longint, SCIP_LONGINT_MAX, and SCIPgetNNodes().

Referenced by createNewSol(), setupSubscipLpface(), and solveSubscipLpface().

◆ calcNodeLimit()

static SCIP_Longint calcNodeLimit ( SCIP scip,
SCIP_HEUR heur,
SCIP_HEURDATA heurdata 
)
static

calculate a node limit based on node limiting parameters of the heuristic

Parameters
scip(original) SCIP data structure
heurLP face heuristic
heurdataprimal heuristic data

Definition at line 416 of file heur_lpface.c.

References SCIP_Longint, SCIPgetNNodes(), SCIPheurGetNCalls(), and setSubscipLimits().

Referenced by setSubscipLimits(), and updateFailureStatistic().

◆ setSubscipLimits()

static SCIP_RETCODE setSubscipLimits ( SCIP scip,
SCIP subscip,
SCIP_HEUR heur,
SCIP_HEURDATA heurdata,
SCIP_Bool success 
)
static

sets node, time, and memory limit according to the parameter settings of the heuristic

Parameters
sciporiginal SCIP data structure
subscipdata structure of the sub-problem
heurLP face heuristic
heurdataheuristic data structure
successdid we successfully set all parameters up?

Definition at line 448 of file heur_lpface.c.

References calcNodeLimit(), FALSE, SCIP_CALL, SCIP_Longint, SCIP_OKAY, SCIP_Real, SCIPgetMemExternEstim(), SCIPgetMemUsed(), SCIPgetNNodes(), SCIPgetRealParam(), SCIPgetSolvingTime(), SCIPisInfinity(), SCIPsetLongintParam(), SCIPsetRealParam(), setSubscipParameters(), and TRUE.

Referenced by calcNodeLimit(), and solveSubscipLpface().

◆ setSubscipParameters()

static SCIP_RETCODE setSubscipParameters ( SCIP scip,
SCIP subscip 
)
static

sets all one-time parameter settings like search strategy, but no limits

Parameters
sciporiginal SCIP data structure
subscipdata structure of the sub-problem

Definition at line 503 of file heur_lpface.c.

References FALSE, SCIP_CALL, SCIP_OKAY, SCIP_PARAMSETTING_FAST, SCIPfindBranchrule(), SCIPfindConshdlr(), SCIPfindNodesel(), SCIPisParamFixed(), SCIPsetBoolParam(), SCIPsetCharParam(), SCIPsetIntParam(), SCIPsetPresolving(), SCIPsetSeparating(), SCIPsetSubscipsOff(), subscipdataReset(), and TRUE.

Referenced by setSubscipLimits(), and setupSubscipLpface().

◆ subscipdataReset()

static void subscipdataReset ( SUBSCIPDATA subscipdata)
static

reset the sub-SCIP data to its default values

Parameters
subscipdatadata structure of the sub-problem

Definition at line 572 of file heur_lpface.c.

References SubscipData::nsubvars, SubscipData::objbound, SCIP_INVALID, SubscipData::subscip, subscipdataFreeSubscip(), and SubscipData::subvars.

Referenced by setSubscipParameters(), and subscipdataFreeSubscip().

◆ subscipdataFreeSubscip()

static SCIP_RETCODE subscipdataFreeSubscip ( SCIP scip,
SUBSCIPDATA subscipdata 
)
static

free the stored sub-SCIP information

Parameters
sciporiginal SCIP data structure
subscipdatadata structure of the sub-problem

Definition at line 584 of file heur_lpface.c.

References SubscipData::nsubvars, SCIP_CALL, SCIP_OKAY, SCIPfree(), SCIPfreeBlockMemoryArray, SubscipData::subscip, subscipdataCopySubscip(), subscipdataReset(), and SubscipData::subvars.

Referenced by subscipdataReset().

◆ subscipdataCopySubscip()

static SCIP_RETCODE subscipdataCopySubscip ( SCIP scip,
SUBSCIPDATA subscipdata,
SCIP subscip,
SCIP_VAR **  subvars,
int  nvars 
)
static

store the sub-SCIP to the data structure

Parameters
sciporiginal SCIP data structure
subscipdatadata structure of the sub-problem
subscipsub scip data structure to keep
subvarssub scip variable array in the order of the main SCIP variables
nvarsnumber of sub SCIP variables

Definition at line 613 of file heur_lpface.c.

References changeSubvariableObjective(), SubscipData::nsubvars, SubscipData::objbound, SCIP_CALL, SCIP_Longint, SCIP_OKAY, SCIP_Real, SCIPdebugMsg, SCIPduplicateBlockMemoryArray, SCIPgetCurrentNode(), SCIPgetLongintParam(), SCIPgetNNodes(), SCIPgetNodeLowerbound(), SCIPgetNVars(), SCIPgetRealParam(), SCIPgetSolvingTime(), SCIPgetStatus(), SubscipData::subscip, and SubscipData::subvars.

Referenced by subscipdataFreeSubscip().

◆ changeSubvariableObjective()

static SCIP_RETCODE changeSubvariableObjective ( SCIP scip,
SCIP subscip,
SCIP_VAR var,
SCIP_VAR subvar,
SCIP_HEURDATA heurdata 
)
static

create the objective function based on the user selection

Parameters
scipSCIP data structure
subscipsub-SCIP data structure
varSCIP variable
subvarsub-SCIP variable whose objective coefficient is changed
heurdataheuristic data structure to control how the objective is changed

Definition at line 671 of file heur_lpface.c.

References SCIP_BRANCHDIR_DOWNWARDS, SCIP_BRANCHDIR_UPWARDS, SCIP_CALL, SCIP_DECL_EVENTEXEC(), SCIP_OKAY, SCIP_Real, SCIPchgVarObj(), SCIPfrac(), SCIPgetVarAvgInferences(), SCIPvarGetLPSol(), SCIPvarGetObj(), and SCIPvarGetRootSol().

Referenced by setupSubscipLpface(), and subscipdataCopySubscip().

◆ SCIP_DECL_EVENTEXEC()

static SCIP_DECL_EVENTEXEC ( eventExecLpface  )
static

execution callback of the event handler for Lpface sub-SCIP

we interrupt the solution process if we hit the LP iteration limit per node

Definition at line 736 of file heur_lpface.c.

Referenced by changeSubvariableObjective().

◆ setupSubscipLpface()

static SCIP_RETCODE setupSubscipLpface ( SCIP scip,
SCIP subscip,
SCIP_HEURDATA heurdata,
SCIP_VAR **  subvars,
SCIP_VAR **  vars,
SCIP_RESULT result,
SCIP_Bool keepthisscip,
int  nvars 
)
static

setup and solve the subproblem and catch the return code

Parameters
scipSCIP data structure
subscipsub-SCIP data structure
heurdataheuristics data
subvarssubproblem's variables
varsoriginal problem's variables
resultpointer to store the result
keepthisscipshould the subscip be kept or deleted?
nvarsnumber of original problem's variables

Definition at line 761 of file heur_lpface.c.

References changeSubvariableObjective(), FALSE, SCIP_Bool, SCIP_CALL, SCIP_DIDNOTRUN, SCIP_MAXSTRLEN, SCIP_OKAY, SCIPblkmem(), SCIPcopy(), SCIPcopyCuts(), SCIPcopyParamSettings(), SCIPcopyVars(), SCIPcreateProbBasic(), SCIPgetProbName(), SCIPhashmapCreate(), SCIPhashmapFree(), SCIPhashmapGetImage(), SCIPincludeDefaultPlugins(), SCIPsetIntParam(), SCIPsnprintf(), setSubscipParameters(), setupSubproblem(), solveSubscipLpface(), TRUE, and updateFailureStatistic().

◆ solveSubscipLpface()

static SCIP_RETCODE solveSubscipLpface ( SCIP scip,
SCIP subscip,
SCIP_HEUR heur,
SCIP_HEURDATA heurdata,
SCIP_VAR **  subvars,
SCIP_RESULT result,
SCIP_Real  focusnodelb,
SCIP_Bool keepthisscip 
)
static

setup and solve the subproblem and catch the return code

Parameters
scipSCIP data structure
subscipsub-SCIP data structure
heurmutation heuristic
heurdataheuristics data
subvarssubproblem's variables
resultpointer to store the result
focusnodelblower bound of the focus node
keepthisscipshould the subscip be kept or deleted?

Definition at line 855 of file heur_lpface.c.

References createNewSol(), EVENTHDLR_DESC, EVENTHDLR_NAME, FALSE, HEUR_NAME, SCIP_Bool, SCIP_CALL, SCIP_CALL_ABORT, SCIP_DECL_HEURCOPY(), SCIP_EVENTTYPE_LPSOLVED, SCIP_FOUNDSOL, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIP_STATUS_INFEASIBLE, SCIPcatchEvent(), SCIPdebug, SCIPdebugMsg, SCIPerrorMessage, SCIPgetBestSol(), SCIPgetNLPIterations(), SCIPgetNNodes(), SCIPgetNSols(), SCIPgetPresolvingTime(), SCIPgetSols(), SCIPgetStatus(), SCIPincludeEventhdlrBasic(), SCIPinfoMessage(), SCIPprintStatistics(), SCIPsolGetIndex(), SCIPsolve(), SCIPtransformProb(), SCIPwriteOrigProblem(), SCIPwriteParams(), setSubscipLimits(), TRUE, and updateFailureStatistic().

Referenced by setupSubscipLpface().

◆ SCIP_DECL_HEURCOPY()

static SCIP_DECL_HEURCOPY ( heurCopyLpface  )
static

copy method for primal heuristic plugins (called when SCIP copies plugins)

Definition at line 984 of file heur_lpface.c.

Referenced by solveSubscipLpface().

◆ SCIP_DECL_HEURFREE()

static SCIP_DECL_HEURFREE ( heurFreeLpface  )
static

destructor of primal heuristic to free user data (called when SCIP is exiting)

Definition at line 998 of file heur_lpface.c.

◆ SCIP_DECL_HEURINIT()

static SCIP_DECL_HEURINIT ( heurInitLpface  )
static

initialization method of primal heuristic (called after problem was transformed)

Definition at line 1018 of file heur_lpface.c.

◆ SCIP_DECL_HEURINITSOL()

static SCIP_DECL_HEURINITSOL ( heurInitsolLpface  )
static

solving process initialization method of primal heuristic (called when branch and bound process is about to begin)

Definition at line 1044 of file heur_lpface.c.

◆ SCIP_DECL_HEUREXITSOL()

static SCIP_DECL_HEUREXITSOL ( heurExitsolLpface  )
static

solving process deinitialization method of primal heuristic (called before branch and bound process is exiting)

Definition at line 1069 of file heur_lpface.c.

◆ SCIP_DECL_HEUREXEC()

static SCIP_DECL_HEUREXEC ( heurExecLpface  )
static

execution method of primal heuristic

Definition at line 1121 of file heur_lpface.c.