SCIP
Solving Constraint Integer Programs
benderscut_feas.c File Reference
Detailed Description
Standard feasibility cuts for Benders' decomposition.
Definition in file benderscut_feas.c.
#include "scip/pub_expr.h"#include "scip/benderscut_feas.h"#include "scip/benderscut_opt.h"#include "scip/cons_linear.h"#include "scip/pub_benderscut.h"#include "scip/pub_benders.h"#include "scip/pub_lp.h"#include "scip/pub_message.h"#include "scip/pub_misc.h"#include "scip/pub_misc_linear.h"#include "scip/pub_nlp.h"#include "scip/pub_var.h"#include "scip/scip_benders.h"#include "scip/scip_cons.h"#include "scip/scip_general.h"#include "scip/scip_lp.h"#include "scip/scip_mem.h"#include "scip/scip_message.h"#include "scip/scip_nlp.h"#include "scip/scip_nlpi.h"#include "scip/scip_numerics.h"#include "scip/scip_prob.h"#include "scip/scip_solvingstats.h"#include "scip/scip_var.h"Go to the source code of this file.
Macros | |
| #define | BENDERSCUT_NAME "feas" |
| #define | BENDERSCUT_DESC "Standard feasibility cuts for Benders' decomposition" |
| #define | BENDERSCUT_PRIORITY 10000 |
| #define | BENDERSCUT_LPCUT TRUE |
Functions | |
| static SCIP_RETCODE | addVariableToArray (SCIP *masterprob, SCIP_VAR ***vars, SCIP_Real **vals, SCIP_VAR *addvar, SCIP_Real addval, int *nvars, int *varssize) |
| static SCIP_RETCODE | computeStandardLPFeasibilityCut (SCIP *masterprob, SCIP *subproblem, SCIP_BENDERS *benders, SCIP_VAR ***vars, SCIP_Real **vals, SCIP_Real *lhs, int *nvars, int *varssize, SCIP_Bool *success) |
| static SCIP_RETCODE | computeStandardNLPFeasibilityCut (SCIP *masterprob, SCIP *subproblem, SCIP_BENDERS *benders, SCIP_VAR ***vars, SCIP_Real **vals, SCIP_Real *lhs, int *nvars, int *varssize, SCIP_Bool *success) |
| static SCIP_RETCODE | generateAndApplyBendersCuts (SCIP *masterprob, SCIP *subproblem, SCIP_BENDERS *benders, SCIP_BENDERSCUT *benderscut, SCIP_SOL *sol, int probnumber, SCIP_RESULT *result) |
| static | SCIP_DECL_BENDERSCUTEXEC (benderscutExecFeas) |
| SCIP_RETCODE | SCIPincludeBenderscutFeas (SCIP *scip, SCIP_BENDERS *benders) |
Macro Definition Documentation
◆ BENDERSCUT_NAME
| #define BENDERSCUT_NAME "feas" |
Definition at line 58 of file benderscut_feas.c.
Referenced by SCIP_DECL_BENDERSCUTEXEC(), and SCIPincludeBenderscutFeas().
◆ BENDERSCUT_DESC
| #define BENDERSCUT_DESC "Standard feasibility cuts for Benders' decomposition" |
Definition at line 59 of file benderscut_feas.c.
Referenced by SCIPincludeBenderscutFeas().
◆ BENDERSCUT_PRIORITY
| #define BENDERSCUT_PRIORITY 10000 |
Definition at line 60 of file benderscut_feas.c.
Referenced by SCIPincludeBenderscutFeas().
◆ BENDERSCUT_LPCUT
| #define BENDERSCUT_LPCUT TRUE |
Definition at line 61 of file benderscut_feas.c.
Referenced by SCIPincludeBenderscutFeas().
Function Documentation
◆ addVariableToArray()
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static |
adds a variable and value to the constraint/row arrays
- Parameters
-
masterprob the SCIP instance of the master problem vars pointer to array of variables in the generated cut with non-zero coefficient vals pointer to array of coefficients of the variables in the generated cut addvar the variable that will be added to the array addval the value that will be added to the array nvars the number of variables in the variable array varssize the length of the variable size
Definition at line 69 of file benderscut_feas.c.
References NULL, SCIP_CALL, SCIP_OKAY, SCIPcalcMemGrowSize(), and SCIPreallocBufferArray.
Referenced by computeStandardLPFeasibilityCut().
◆ computeStandardLPFeasibilityCut()
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static |
computing as standard Benders' feasibility cut from the dual solutions of the LP
- Parameters
-
masterprob the SCIP instance of the master problem subproblem the SCIP instance of the pricing problem benders the benders' decomposition structure vars pointer to array of variables in the generated cut with non-zero coefficient vals pointer to array of coefficients of the variables in the generated cut lhs the left hand side of the cut nvars the number of variables in the cut varssize the number of variables in the array success was the cut generation successful?
Definition at line 105 of file benderscut_feas.c.
References addVariableToArray(), FALSE, NULL, SCIP_CALL, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_OKAY, SCIP_Real, SCIPdebugMsg, SCIPgetBendersMasterVar(), SCIPgetLPRows(), SCIPgetLPSolstat(), SCIPgetNLPRows(), SCIPgetNVars(), SCIPgetVarFarkasCoef(), SCIPgetVars(), SCIPisDualfeasZero(), SCIPisInfinity(), SCIPisNegative(), SCIPisPositive(), SCIPisZero(), SCIProwGetDualfarkas(), SCIProwGetLhs(), SCIProwGetRhs(), SCIPvarGetLbGlobal(), SCIPvarGetName(), SCIPvarGetUbGlobal(), and TRUE.
Referenced by generateAndApplyBendersCuts().
◆ computeStandardNLPFeasibilityCut()
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static |
computing as standard Benders' feasibility cut from the dual solutions of the NLP
NOTE: The cut must be created before being passed to this function
- Parameters
-
masterprob the SCIP instance of the master problem subproblem the SCIP instance of the pricing problem benders the benders' decomposition structure vars pointer to array of variables in the generated cut with non-zero coefficient vals pointer to array of coefficients of the variables in the generated cut lhs the left hand side of the cut nvars the number of variables in the cut varssize the number of variables in the array success was the cut generation successful?
Definition at line 226 of file benderscut_feas.c.
References FALSE, NULL, SCIP_CALL, SCIP_NLPSOLSTAT_GLOBINFEASIBLE, SCIP_NLPSOLSTAT_LOCINFEASIBLE, SCIP_OKAY, SCIP_Real, SCIPaddNlRowGradientBenderscutOpt(), SCIPdebugMsg, SCIPgetNLPNlRows(), SCIPgetNLPSolstat(), SCIPgetNlRowActivity(), SCIPgetNNLPNlRows(), SCIPisInfinity(), SCIPisNLPConstructed(), SCIPisZero(), SCIPnlrowGetDualsol(), SCIPnlrowGetLhs(), SCIPnlrowGetRhs(), and TRUE.
Referenced by generateAndApplyBendersCuts().
◆ generateAndApplyBendersCuts()
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static |
generates and applies Benders' cuts
- Parameters
-
masterprob the SCIP instance of the master problem subproblem the SCIP instance of the pricing problem benders the benders' decomposition benderscut the benders' decomposition cut method sol primal CIP solution probnumber the number of the pricing problem result the result from solving the subproblems
Definition at line 305 of file benderscut_feas.c.
References computeStandardLPFeasibilityCut(), computeStandardNLPFeasibilityCut(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_CONSADDED, SCIP_DIDNOTFIND, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIP_VERBLEVEL_FULL, SCIPABORT, SCIPaddCons(), SCIPallocClearBufferArray, SCIPbenderscutGetNFound(), SCIPcreateConsBasicLinear(), SCIPdebugMsg, SCIPdebugPrintCons, SCIPfreeBufferArray, SCIPgetActivityLinear(), SCIPgetLhsLinear(), SCIPgetNFixedVars(), SCIPgetNLPIterations(), SCIPgetNNlpis(), SCIPgetNVars(), SCIPgetRhsLinear(), SCIPinfinity(), SCIPisGE(), SCIPisInfinity(), SCIPisNLPConstructed(), SCIPreleaseCons(), SCIPsetConsDynamic(), SCIPsetConsRemovable(), SCIPsnprintf(), SCIPverbMessage(), and TRUE.
Referenced by SCIP_DECL_BENDERSCUTEXEC().
◆ SCIP_DECL_BENDERSCUTEXEC()
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static |
execution method of Benders' decomposition cuts
Definition at line 421 of file benderscut_feas.c.
References BENDERSCUT_NAME, generateAndApplyBendersCuts(), NULL, SCIP_Bool, SCIP_CALL, SCIP_DIDNOTRUN, SCIP_LPSOLSTAT_INFEASIBLE, SCIP_NLPSOLSTAT_GLOBINFEASIBLE, SCIP_NLPSOLSTAT_LOCINFEASIBLE, SCIP_OKAY, SCIP_STAGE_SOLVING, SCIPbendersGetNSubproblems(), SCIPbendersSubproblem(), SCIPdebugMsg, SCIPgetLPSolstat(), SCIPgetNLPSolstat(), SCIPgetNNlpis(), SCIPgetStage(), and SCIPisNLPConstructed().