Scippy

SCIP

Solving Constraint Integer Programs

solve.h
Go to the documentation of this file.
1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
2 /* */
3 /* This file is part of the program and library */
4 /* SCIP --- Solving Constraint Integer Programs */
5 /* */
6 /* Copyright (C) 2002-2022 Konrad-Zuse-Zentrum */
7 /* fuer Informationstechnik Berlin */
8 /* */
9 /* SCIP is distributed under the terms of the ZIB Academic License. */
10 /* */
11 /* You should have received a copy of the ZIB Academic License */
12 /* along with SCIP; see the file COPYING. If not visit scipopt.org. */
13 /* */
14 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
15 
16 /**@file solve.h
17  * @ingroup INTERNALAPI
18  * @brief internal methods for main solving loop and node processing
19  * @author Tobias Achterberg
20  */
21 
22 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
23 
24 #ifndef __SCIP_SOLVE_H__
25 #define __SCIP_SOLVE_H__
26 
27 
28 #include "blockmemshell/memory.h"
29 #include "scip/def.h"
30 #include "scip/type_conflict.h"
32 #include "scip/type_cutpool.h"
33 #include "scip/type_event.h"
34 #include "scip/type_lp.h"
35 #include "scip/type_mem.h"
36 #include "scip/type_message.h"
37 #include "scip/type_pricestore.h"
38 #include "scip/type_primal.h"
39 #include "scip/type_prob.h"
40 #include "scip/type_reopt.h"
41 #include "scip/type_retcode.h"
42 #include "scip/type_sepastore.h"
43 #include "scip/type_set.h"
44 #include "scip/type_stat.h"
45 #include "scip/type_tree.h"
46 
47 #ifdef __cplusplus
48 extern "C" {
49 #endif
50 
51 /** returns whether the solving process will be / was stopped before proving optimality;
52  * if the solving process was stopped, stores the reason as status in stat
53  */
54 SCIP_EXPORT
56  SCIP_SET* set, /**< global SCIP settings */
57  SCIP_STAT* stat, /**< dynamic problem statistics */
58  SCIP_Bool checknodelimits /**< should the node limits be involved in the check? */
59  );
60 
61 /** applies domain propagation on current node and flushes the conflict store afterwards */
63  BMS_BLKMEM* blkmem, /**< block memory buffers */
64  SCIP_SET* set, /**< global SCIP settings */
65  SCIP_STAT* stat, /**< dynamic problem statistics */
66  SCIP_PROB* transprob, /**< transformed problem */
67  SCIP_PROB* origprob, /**< original problem */
68  SCIP_TREE* tree, /**< branch and bound tree */
69  SCIP_REOPT* reopt, /**< reoptimization data structure */
70  SCIP_LP* lp, /**< LP data */
71  SCIP_BRANCHCAND* branchcand, /**< branching candidate storage */
72  SCIP_EVENTQUEUE* eventqueue, /**< event queue */
73  SCIP_CONFLICT* conflict, /**< conflict analysis data */
74  SCIP_CLIQUETABLE* cliquetable, /**< clique table data structure */
75  int depth, /**< depth level to use for propagator frequency checks */
76  int maxrounds, /**< maximal number of propagation rounds (-1: no limit, 0: parameter settings) */
77  SCIP_PROPTIMING timingmask, /**< timing mask to decide which propagators are executed */
78  SCIP_Bool* cutoff /**< pointer to store whether the node can be cut off */
79  );
80 
81 /** puts all constraints with initial flag TRUE into the LP */
83  BMS_BLKMEM* blkmem, /**< block memory buffers */
84  SCIP_SET* set, /**< global SCIP settings */
85  SCIP_SEPASTORE* sepastore, /**< separation storage */
86  SCIP_CUTPOOL* cutpool, /**< global cutpool */
87  SCIP_STAT* stat, /**< dynamic problem statistics */
88  SCIP_PROB* transprob, /**< transformed problem */
89  SCIP_PROB* origprob, /**< original problem */
90  SCIP_TREE* tree, /**< branch and bound tree */
91  SCIP_REOPT* reopt, /**< reoptimization data structure */
92  SCIP_LP* lp, /**< LP data */
93  SCIP_BRANCHCAND* branchcand, /**< branching candidate storage */
94  SCIP_EVENTQUEUE* eventqueue, /**< event queue */
95  SCIP_EVENTFILTER* eventfilter, /**< global event filter */
96  SCIP_CLIQUETABLE* cliquetable, /**< clique table data structure */
97  SCIP_Bool root, /**< is this the initial root LP? */
98  SCIP_Bool firstsubtreeinit, /**< is this the first call in the current subtree after jumping through the tree? */
99  SCIP_Bool* cutoff /**< pointer to store whether the node can be cut off */
100  );
101 
102 /** constructs the LP of the current node, but does not load the LP state and warmstart information */
104  BMS_BLKMEM* blkmem, /**< block memory buffers */
105  SCIP_SET* set, /**< global SCIP settings */
106  SCIP_STAT* stat, /**< dynamic problem statistics */
107  SCIP_PROB* transprob, /**< transformed problem */
108  SCIP_PROB* origprob, /**< original problem */
109  SCIP_TREE* tree, /**< branch and bound tree */
110  SCIP_REOPT* reopt, /**< reoptimization data structure */
111  SCIP_LP* lp, /**< LP data */
112  SCIP_PRICESTORE* pricestore, /**< pricing storage */
113  SCIP_SEPASTORE* sepastore, /**< separation storage */
114  SCIP_CUTPOOL* cutpool, /**< global cutpool */
115  SCIP_BRANCHCAND* branchcand, /**< branching candidate storage */
116  SCIP_EVENTQUEUE* eventqueue, /**< event queue */
117  SCIP_EVENTFILTER* eventfilter, /**< global event filter */
118  SCIP_CLIQUETABLE* cliquetable, /**< clique table data structure */
119  SCIP_Bool newinitconss, /**< do we have to add new initial constraints? */
120  SCIP_Bool* cutoff /**< pointer to store whether the node can be cut off */
121  );
122 
123 /** calls primal heuristics */
125  SCIP_SET* set, /**< global SCIP settings */
126  SCIP_STAT* stat, /**< dynamic problem statistics */
127  SCIP_PROB* prob, /**< transformed problem after presolve */
128  SCIP_PRIMAL* primal, /**< primal data */
129  SCIP_TREE* tree, /**< branch and bound tree */
130  SCIP_LP* lp, /**< LP data */
131  SCIP_NODE* nextnode, /**< next node that will be processed, or NULL if no more nodes left
132  * (only needed when calling after node heuristics) */
133  SCIP_HEURTIMING heurtiming, /**< current point in the node solving process */
134  SCIP_Bool nodeinfeasible, /**< was the current node already detected to be infeasible? */
135  SCIP_Bool* foundsol, /**< pointer to store whether a solution has been found */
136  SCIP_Bool* unbounded /**< pointer to store whether an unbounded ray was found in the LP */
137  );
138 
139 /** applies one round of separation on the given primal solution or on the LP solution */
141  BMS_BLKMEM* blkmem, /**< block memory buffers */
142  SCIP_SET* set, /**< global SCIP settings */
143  SCIP_MESSAGEHDLR* messagehdlr, /**< message handler */
144  SCIP_STAT* stat, /**< dynamic problem statistics */
145  SCIP_EVENTQUEUE* eventqueue, /**< event queue */
146  SCIP_EVENTFILTER* eventfilter, /**< global event filter */
147  SCIP_PROB* prob, /**< transformed problem after presolve */
148  SCIP_PRIMAL* primal, /**< primal data */
149  SCIP_TREE* tree, /**< branch and bound tree */
150  SCIP_LP* lp, /**< LP data */
151  SCIP_SEPASTORE* sepastore, /**< separation storage */
152  SCIP_SOL* sol, /**< primal solution that should be separated, or NULL for LP solution */
153  int actdepth, /**< current depth in the tree */
154  SCIP_Bool allowlocal, /**< should the separator be asked to separate local cuts */
155  SCIP_Bool onlydelayed, /**< should only delayed separators be called? */
156  SCIP_Bool* delayed, /**< pointer to store whether a separator was delayed */
157  SCIP_Bool* cutoff /**< pointer to store whether the node can be cut off */
158  );
159 
160 /** solves the current LP completely with pricing in new variables */
162  BMS_BLKMEM* blkmem, /**< block memory buffers */
163  SCIP_SET* set, /**< global SCIP settings */
164  SCIP_MESSAGEHDLR* messagehdlr, /**< message handler */
165  SCIP_STAT* stat, /**< dynamic problem statistics */
166  SCIP_PROB* transprob, /**< transformed problem */
167  SCIP_PROB* origprob, /**< original problem */
168  SCIP_PRIMAL* primal, /**< primal data */
169  SCIP_TREE* tree, /**< branch and bound tree */
170  SCIP_REOPT* reopt, /**< reoptimization data structure */
171  SCIP_LP* lp, /**< LP data */
172  SCIP_PRICESTORE* pricestore, /**< pricing storage */
173  SCIP_SEPASTORE* sepastore, /**< separation storage */
174  SCIP_CUTPOOL* cutpool, /**< global cutpool */
175  SCIP_BRANCHCAND* branchcand, /**< branching candidate storage */
176  SCIP_EVENTQUEUE* eventqueue, /**< event queue */
177  SCIP_EVENTFILTER* eventfilter, /**< global event filter */
178  SCIP_CLIQUETABLE* cliquetable, /**< clique table data structure */
179  SCIP_Bool pretendroot, /**< should the pricers be called as if we are at the root node? */
180  SCIP_Bool displayinfo, /**< should info lines be displayed after each pricing round? */
181  int maxpricerounds, /**< maximal number of pricing rounds (-1: no limit);
182  * a finite limit means that the LP might not be solved to optimality! */
183  int* npricedcolvars, /**< pointer to store number of column variables after problem vars were priced */
184  SCIP_Bool* mustsepa, /**< pointer to store TRUE if a separation round should follow */
185  SCIP_Bool* lperror, /**< pointer to store whether an unresolved error in LP solving occured */
186  SCIP_Bool* aborted /**< pointer to store whether the pricing was aborted and the lower bound must
187  * not be used */
188  );
189 
190 /** main solving loop */
192  BMS_BLKMEM* blkmem, /**< block memory buffers */
193  SCIP_SET* set, /**< global SCIP settings */
194  SCIP_MESSAGEHDLR* messagehdlr, /**< message handler */
195  SCIP_STAT* stat, /**< dynamic problem statistics */
196  SCIP_MEM* mem, /**< block memory pools */
197  SCIP_PROB* origprob, /**< original problem */
198  SCIP_PROB* transprob, /**< transformed problem after presolve */
199  SCIP_PRIMAL* primal, /**< primal data */
200  SCIP_TREE* tree, /**< branch and bound tree */
201  SCIP_REOPT* reopt, /**< reoptimization data structure */
202  SCIP_LP* lp, /**< LP data */
203  SCIP_RELAXATION* relaxation, /**< global relaxation data */
204  SCIP_PRICESTORE* pricestore, /**< pricing storage */
205  SCIP_SEPASTORE* sepastore, /**< separation storage */
206  SCIP_CUTPOOL* cutpool, /**< global cut pool */
207  SCIP_CUTPOOL* delayedcutpool, /**< global delayed cut pool */
208  SCIP_BRANCHCAND* branchcand, /**< branching candidate storage */
209  SCIP_CONFLICT* conflict, /**< conflict analysis data */
210  SCIP_CONFLICTSTORE* conflictstore, /**< conflict store */
211  SCIP_EVENTFILTER* eventfilter, /**< event filter for global (not variable dependent) events */
212  SCIP_EVENTQUEUE* eventqueue, /**< event queue */
213  SCIP_CLIQUETABLE* cliquetable, /**< clique table data structure */
214  SCIP_Bool* restart /**< should solving process be started again with presolving? */
215  );
216 
217 #ifdef __cplusplus
218 }
219 #endif
220 
221 #endif
SCIP_RETCODE SCIPseparationRound(BMS_BLKMEM *blkmem, SCIP_SET *set, SCIP_MESSAGEHDLR *messagehdlr, SCIP_STAT *stat, SCIP_EVENTQUEUE *eventqueue, SCIP_EVENTFILTER *eventfilter, SCIP_PROB *prob, SCIP_PRIMAL *primal, SCIP_TREE *tree, SCIP_LP *lp, SCIP_SEPASTORE *sepastore, SCIP_SOL *sol, int actdepth, SCIP_Bool allowlocal, SCIP_Bool onlydelayed, SCIP_Bool *delayed, SCIP_Bool *cutoff)
Definition: solve.c:1949
type definitions for conflict store
unsigned int SCIP_HEURTIMING
Definition: type_timing.h:97
type definitions for storing priced variables
enum SCIP_Retcode SCIP_RETCODE
Definition: type_retcode.h:54
type definitions for global SCIP settings
SCIP_RETCODE SCIPconstructCurrentLP(BMS_BLKMEM *blkmem, SCIP_SET *set, SCIP_STAT *stat, SCIP_PROB *transprob, SCIP_PROB *origprob, SCIP_TREE *tree, SCIP_REOPT *reopt, SCIP_LP *lp, SCIP_PRICESTORE *pricestore, SCIP_SEPASTORE *sepastore, SCIP_CUTPOOL *cutpool, SCIP_BRANCHCAND *branchcand, SCIP_EVENTQUEUE *eventqueue, SCIP_EVENTFILTER *eventfilter, SCIP_CLIQUETABLE *cliquetable, SCIP_Bool newinitconss, SCIP_Bool *cutoff)
Definition: solve.c:1272
type definitions for return codes for SCIP methods
type definitions for collecting reoptimization information
type definitions for problem statistics
type definitions for LP management
SCIP_RETCODE SCIPsolveCIP(BMS_BLKMEM *blkmem, SCIP_SET *set, SCIP_MESSAGEHDLR *messagehdlr, SCIP_STAT *stat, SCIP_MEM *mem, SCIP_PROB *origprob, SCIP_PROB *transprob, SCIP_PRIMAL *primal, SCIP_TREE *tree, SCIP_REOPT *reopt, SCIP_LP *lp, SCIP_RELAXATION *relaxation, SCIP_PRICESTORE *pricestore, SCIP_SEPASTORE *sepastore, SCIP_CUTPOOL *cutpool, SCIP_CUTPOOL *delayedcutpool, SCIP_BRANCHCAND *branchcand, SCIP_CONFLICT *conflict, SCIP_CONFLICTSTORE *conflictstore, SCIP_EVENTFILTER *eventfilter, SCIP_EVENTQUEUE *eventqueue, SCIP_CLIQUETABLE *cliquetable, SCIP_Bool *restart)
Definition: solve.c:4817
type definitions for storing cuts in a cut pool
SCIP_RETCODE SCIPpropagateDomains(BMS_BLKMEM *blkmem, SCIP_SET *set, SCIP_STAT *stat, SCIP_PROB *transprob, SCIP_PROB *origprob, SCIP_TREE *tree, SCIP_REOPT *reopt, SCIP_LP *lp, SCIP_BRANCHCAND *branchcand, SCIP_EVENTQUEUE *eventqueue, SCIP_CONFLICT *conflict, SCIP_CLIQUETABLE *cliquetable, int depth, int maxrounds, SCIP_PROPTIMING timingmask, SCIP_Bool *cutoff)
Definition: solve.c:635
type definitions for storing separated cuts
type definitions for conflict analysis
type definitions for managing events
#define SCIP_Bool
Definition: def.h:84
type definitions for branch and bound tree
SCIP_RETCODE SCIPpriceLoop(BMS_BLKMEM *blkmem, SCIP_SET *set, SCIP_MESSAGEHDLR *messagehdlr, SCIP_STAT *stat, SCIP_PROB *transprob, SCIP_PROB *origprob, SCIP_PRIMAL *primal, SCIP_TREE *tree, SCIP_REOPT *reopt, SCIP_LP *lp, SCIP_PRICESTORE *pricestore, SCIP_SEPASTORE *sepastore, SCIP_CUTPOOL *cutpool, SCIP_BRANCHCAND *branchcand, SCIP_EVENTQUEUE *eventqueue, SCIP_EVENTFILTER *eventfilter, SCIP_CLIQUETABLE *cliquetable, SCIP_Bool pretendroot, SCIP_Bool displayinfo, int maxpricerounds, int *npricedcolvars, SCIP_Bool *mustsepa, SCIP_Bool *lperror, SCIP_Bool *aborted)
Definition: solve.c:2002
type definitions for storing and manipulating the main problem
type definitions for block memory pools and memory buffers
unsigned int SCIP_PROPTIMING
Definition: type_timing.h:66
SCIP_RETCODE SCIPprimalHeuristics(SCIP_SET *set, SCIP_STAT *stat, SCIP_PROB *prob, SCIP_PRIMAL *primal, SCIP_TREE *tree, SCIP_LP *lp, SCIP_NODE *nextnode, SCIP_HEURTIMING heurtiming, SCIP_Bool nodeinfeasible, SCIP_Bool *foundsol, SCIP_Bool *unbounded)
Definition: solve.c:205
type definitions for message output methods
type definitions for collecting primal CIP solutions and primal informations
common defines and data types used in all packages of SCIP
struct BMS_BlkMem BMS_BLKMEM
Definition: memory.h:430
SCIP_Bool SCIPsolveIsStopped(SCIP_SET *set, SCIP_STAT *stat, SCIP_Bool checknodelimits)
Definition: solve.c:93
SCIP_RETCODE SCIPinitConssLP(BMS_BLKMEM *blkmem, SCIP_SET *set, SCIP_SEPASTORE *sepastore, SCIP_CUTPOOL *cutpool, SCIP_STAT *stat, SCIP_PROB *transprob, SCIP_PROB *origprob, SCIP_TREE *tree, SCIP_REOPT *reopt, SCIP_LP *lp, SCIP_BRANCHCAND *branchcand, SCIP_EVENTQUEUE *eventqueue, SCIP_EVENTFILTER *eventfilter, SCIP_CLIQUETABLE *cliquetable, SCIP_Bool root, SCIP_Bool firstsubtreeinit, SCIP_Bool *cutoff)
Definition: solve.c:1099
memory allocation routines