Scippy

SCIP

Solving Constraint Integer Programs

Detailed Description

methods for Benders' decomposition cut

Author
Stephen J. Maher

Definition in file benderscut.c.

#include <assert.h>
#include <string.h>
#include "scip/def.h"
#include "scip/set.h"
#include "scip/clock.h"
#include "scip/paramset.h"
#include "scip/scip.h"
#include "scip/benderscut.h"
#include "scip/reopt.h"
#include "scip/pub_message.h"
#include "scip/pub_misc.h"
#include "scip/pub_benders.h"
#include "scip/struct_benderscut.h"

Go to the source code of this file.

Macros

#define SCIP_DEFAULT_ENABLED   TRUE
 

Functions

 SCIP_DECL_SORTPTRCOMP (SCIPbenderscutComp)
 
 SCIP_DECL_SORTPTRCOMP (SCIPbenderscutCompName)
 
static SCIP_DECL_PARAMCHGD (paramChgdBenderscutPriority)
 
SCIP_RETCODE SCIPbenderscutCopyInclude (SCIP_BENDERS *benders, SCIP_BENDERSCUT *benderscut, SCIP_SET *set)
 
static SCIP_RETCODE doBenderscutCreate (SCIP_BENDERS *benders, SCIP_BENDERSCUT **benderscut, SCIP_SET *set, SCIP_MESSAGEHDLR *messagehdlr, BMS_BLKMEM *blkmem, const char *name, const char *desc, int priority, SCIP_Bool islpcut, SCIP_DECL_BENDERSCUTCOPY((*benderscutcopy)), SCIP_DECL_BENDERSCUTFREE((*benderscutfree)), SCIP_DECL_BENDERSCUTINIT((*benderscutinit)), SCIP_DECL_BENDERSCUTEXIT((*benderscutexit)), SCIP_DECL_BENDERSCUTINITSOL((*benderscutinitsol)), SCIP_DECL_BENDERSCUTEXITSOL((*benderscutexitsol)), SCIP_DECL_BENDERSCUTEXEC((*benderscutexec)), SCIP_BENDERSCUTDATA *benderscutdata)
 
SCIP_RETCODE SCIPbenderscutCreate (SCIP_BENDERS *benders, SCIP_BENDERSCUT **benderscut, SCIP_SET *set, SCIP_MESSAGEHDLR *messagehdlr, BMS_BLKMEM *blkmem, const char *name, const char *desc, int priority, SCIP_Bool islpcut, SCIP_DECL_BENDERSCUTCOPY((*benderscutcopy)), SCIP_DECL_BENDERSCUTFREE((*benderscutfree)), SCIP_DECL_BENDERSCUTINIT((*benderscutinit)), SCIP_DECL_BENDERSCUTEXIT((*benderscutexit)), SCIP_DECL_BENDERSCUTINITSOL((*benderscutinitsol)), SCIP_DECL_BENDERSCUTEXITSOL((*benderscutexitsol)), SCIP_DECL_BENDERSCUTEXEC((*benderscutexec)), SCIP_BENDERSCUTDATA *benderscutdata)
 
SCIP_RETCODE SCIPbenderscutFree (SCIP_BENDERSCUT **benderscut, SCIP_SET *set)
 
SCIP_RETCODE SCIPbenderscutInit (SCIP_BENDERSCUT *benderscut, SCIP_SET *set)
 
SCIP_RETCODE SCIPbenderscutExit (SCIP_BENDERSCUT *benderscut, SCIP_SET *set)
 
SCIP_RETCODE SCIPbenderscutInitsol (SCIP_BENDERSCUT *benderscut, SCIP_SET *set)
 
SCIP_RETCODE SCIPbenderscutExitsol (SCIP_BENDERSCUT *benderscut, SCIP_SET *set)
 
SCIP_RETCODE SCIPbenderscutExec (SCIP_BENDERSCUT *benderscut, SCIP_SET *set, SCIP_BENDERS *benders, SCIP_SOL *sol, int probnumber, SCIP_BENDERSENFOTYPE type, SCIP_RESULT *result)
 
SCIP_BENDERSCUTDATASCIPbenderscutGetData (SCIP_BENDERSCUT *benderscut)
 
void SCIPbenderscutSetData (SCIP_BENDERSCUT *benderscut, SCIP_BENDERSCUTDATA *benderscutdata)
 
void SCIPbenderscutSetCopy (SCIP_BENDERSCUT *benderscut, SCIP_DECL_BENDERSCUTCOPY((*benderscutcopy)))
 
void SCIPbenderscutSetFree (SCIP_BENDERSCUT *benderscut, SCIP_DECL_BENDERSCUTFREE((*benderscutfree)))
 
void SCIPbenderscutSetInit (SCIP_BENDERSCUT *benderscut, SCIP_DECL_BENDERSCUTINIT((*benderscutinit)))
 
void SCIPbenderscutSetExit (SCIP_BENDERSCUT *benderscut, SCIP_DECL_BENDERSCUTEXIT((*benderscutexit)))
 
void SCIPbenderscutSetInitsol (SCIP_BENDERSCUT *benderscut, SCIP_DECL_BENDERSCUTINITSOL((*benderscutinitsol)))
 
void SCIPbenderscutSetExitsol (SCIP_BENDERSCUT *benderscut, SCIP_DECL_BENDERSCUTEXITSOL((*benderscutexitsol)))
 
const char * SCIPbenderscutGetName (SCIP_BENDERSCUT *benderscut)
 
const char * SCIPbenderscutGetDesc (SCIP_BENDERSCUT *benderscut)
 
int SCIPbenderscutGetPriority (SCIP_BENDERSCUT *benderscut)
 
void SCIPbenderscutSetPriority (SCIP_BENDERSCUT *benderscut, int priority)
 
SCIP_Longint SCIPbenderscutGetNCalls (SCIP_BENDERSCUT *benderscut)
 
SCIP_Longint SCIPbenderscutGetNFound (SCIP_BENDERSCUT *benderscut)
 
SCIP_Bool SCIPbenderscutIsInitialized (SCIP_BENDERSCUT *benderscut)
 
SCIP_Real SCIPbenderscutGetSetupTime (SCIP_BENDERSCUT *benderscut)
 
SCIP_Real SCIPbenderscutGetTime (SCIP_BENDERSCUT *benderscut)
 
SCIP_Bool SCIPbenderscutIsLPCut (SCIP_BENDERSCUT *benderscut)
 
void SCIPbenderscutSetEnabled (SCIP_BENDERSCUT *benderscut, SCIP_Bool enabled)
 

Macro Definition Documentation

◆ SCIP_DEFAULT_ENABLED

#define SCIP_DEFAULT_ENABLED   TRUE

Definition at line 50 of file benderscut.c.

Referenced by doBenderscutCreate().

Function Documentation

◆ SCIP_DECL_PARAMCHGD()

static SCIP_DECL_PARAMCHGD ( paramChgdBenderscutPriority  )
static

method to call, when the priority of a compression was changed

Definition at line 72 of file benderscut.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPparamGetData(), SCIPparamGetInt(), and SCIPsetBenderscutPriority().

◆ SCIPbenderscutCopyInclude()

SCIP_RETCODE SCIPbenderscutCopyInclude ( SCIP_BENDERS benders,
SCIP_BENDERSCUT benderscut,
SCIP_SET set 
)

copies the given Benders' decomposition cut to a new scip

Parameters
bendersthe Benders' decomposition that the cuts are copied to
benderscutBenders' decomposition cut
setSCIP_SET of SCIP to copy to

Definition at line 86 of file benderscut.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPbenderscutGetName(), and SCIPsetDebugMsg.

Referenced by SCIPbendersCopyInclude().

◆ doBenderscutCreate()

static SCIP_RETCODE doBenderscutCreate ( SCIP_BENDERS benders,
SCIP_BENDERSCUT **  benderscut,
SCIP_SET set,
SCIP_MESSAGEHDLR messagehdlr,
BMS_BLKMEM blkmem,
const char *  name,
const char *  desc,
int  priority,
SCIP_Bool  islpcut,
SCIP_DECL_BENDERSCUTCOPY((*benderscutcopy))  ,
SCIP_DECL_BENDERSCUTFREE((*benderscutfree))  ,
SCIP_DECL_BENDERSCUTINIT((*benderscutinit))  ,
SCIP_DECL_BENDERSCUTEXIT((*benderscutexit))  ,
SCIP_DECL_BENDERSCUTINITSOL((*benderscutinitsol))  ,
SCIP_DECL_BENDERSCUTEXITSOL((*benderscutexitsol))  ,
SCIP_DECL_BENDERSCUTEXEC((*benderscutexec))  ,
SCIP_BENDERSCUTDATA benderscutdata 
)
static

internal method for creating a Benders' decomposition structure

Parameters
bendersBenders' decomposition
benderscutpointer to the Benders' decomposition cut data structure
setglobal SCIP settings
messagehdlrmessage handler
blkmemblock memory for parameter settings
namename of the Benders' decomposition cut
descdescription of the Benders' decomposition cut
prioritypriority of the the Benders' decomposition cut
islpcutindicates whether the cut is generated from the LP solution
benderscutdataBenders' decomposition cut data

Definition at line 107 of file benderscut.c.

References BMSallocMemory, BMSduplicateMemoryArray, FALSE, NULL, paramname, SCIP_ALLOC, SCIP_CALL, SCIP_CLOCKTYPE_DEFAULT, SCIP_DEFAULT_ENABLED, SCIP_MAXSTRLEN, SCIP_OKAY, SCIPbendersGetName(), SCIPclockCreate(), SCIPsetAddBoolParam(), SCIPsetAddIntParam(), SCIPsnprintf(), and TRUE.

Referenced by SCIPbenderscutCreate().

◆ SCIPbenderscutCreate()

SCIP_RETCODE SCIPbenderscutCreate ( SCIP_BENDERS benders,
SCIP_BENDERSCUT **  benderscut,
SCIP_SET set,
SCIP_MESSAGEHDLR messagehdlr,
BMS_BLKMEM blkmem,
const char *  name,
const char *  desc,
int  priority,
SCIP_Bool  islpcut,
SCIP_DECL_BENDERSCUTCOPY((*benderscutcopy))  ,
SCIP_DECL_BENDERSCUTFREE((*benderscutfree))  ,
SCIP_DECL_BENDERSCUTINIT((*benderscutinit))  ,
SCIP_DECL_BENDERSCUTEXIT((*benderscutexit))  ,
SCIP_DECL_BENDERSCUTINITSOL((*benderscutinitsol))  ,
SCIP_DECL_BENDERSCUTEXITSOL((*benderscutexitsol))  ,
SCIP_DECL_BENDERSCUTEXEC((*benderscutexec))  ,
SCIP_BENDERSCUTDATA benderscutdata 
)

creates a Benders' decomposition cut

Parameters
bendersBenders' decomposition
benderscutpointer to the Benders' decomposition cut data structure
setglobal SCIP settings
messagehdlrmessage handler
blkmemblock memory for parameter settings
namename of the Benders' decomposition cut
descdescription of the Benders' decomposition cut
prioritypriority of the the Benders' decomposition cut
islpcutindicates whether the cut is generated from the LP solution
benderscutdataBenders' decomposition cut data

Definition at line 170 of file benderscut.c.

References doBenderscutCreate(), NULL, SCIP_CALL_FINALLY, SCIP_OKAY, and SCIPbenderscutFree().

Referenced by SCIPincludeBenderscut(), and SCIPincludeBenderscutBasic().

◆ SCIPbenderscutFree()

SCIP_RETCODE SCIPbenderscutFree ( SCIP_BENDERSCUT **  benderscut,
SCIP_SET set 
)

calls destructor and frees memory of the Benders' decomposition cut

Parameters
benderscutpointer to the Benders' decomposition cut data structure
setglobal SCIP settings

Definition at line 203 of file benderscut.c.

References BMSfreeMemory, BMSfreeMemoryArray, NULL, SCIP_CALL, SCIP_OKAY, and SCIPclockFree().

Referenced by SCIPbenderscutCreate(), and SCIPbendersFree().

◆ SCIPbenderscutInit()

SCIP_RETCODE SCIPbenderscutInit ( SCIP_BENDERSCUT benderscut,
SCIP_SET set 
)

initializes the Benders' decomposition cut

Parameters
benderscutBenders' decomposition cut
setglobal SCIP settings

Definition at line 229 of file benderscut.c.

References SCIP_Benderscut::benderscutclock, SCIP_Benderscut::initialized, SCIP_Benderscut::name, SCIP_Benderscut::ncalls, SCIP_Benderscut::nfound, NULL, SCIP_CALL, SCIP_INVALIDCALL, SCIP_OKAY, SCIPclockReset(), SCIPclockStart(), SCIPclockStop(), SCIPerrorMessage, SCIP_Benderscut::setuptime, and TRUE.

Referenced by SCIPbendersInit().

◆ SCIPbenderscutExit()

SCIP_RETCODE SCIPbenderscutExit ( SCIP_BENDERSCUT benderscut,
SCIP_SET set 
)

calls exit method of the Benders' decomposition cut

Parameters
benderscutBenders' decomposition cut
setglobal SCIP settings

Definition at line 268 of file benderscut.c.

References FALSE, SCIP_Benderscut::initialized, SCIP_Benderscut::name, NULL, SCIP_CALL, SCIP_INVALIDCALL, SCIP_OKAY, SCIPclockStart(), SCIPclockStop(), SCIPerrorMessage, and SCIP_Benderscut::setuptime.

Referenced by SCIPbendersExit().

◆ SCIPbenderscutInitsol()

SCIP_RETCODE SCIPbenderscutInitsol ( SCIP_BENDERSCUT benderscut,
SCIP_SET set 
)

informs Benders' cut that the branch and bound process is being started

Parameters
benderscutBenders' decomposition cut
setglobal SCIP settings

Definition at line 298 of file benderscut.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPclockStart(), SCIPclockStop(), and SCIP_Benderscut::setuptime.

Referenced by SCIPbendersInitsol().

◆ SCIPbenderscutExitsol()

SCIP_RETCODE SCIPbenderscutExitsol ( SCIP_BENDERSCUT benderscut,
SCIP_SET set 
)

informs Benders' decomposition that the branch and bound process data is being freed

Parameters
benderscutBenders' decomposition
setglobal SCIP settings

Definition at line 322 of file benderscut.c.

References NULL, SCIP_CALL, SCIP_OKAY, SCIPclockStart(), SCIPclockStop(), and SCIP_Benderscut::setuptime.

Referenced by SCIPbendersExitsol().

◆ SCIPbenderscutExec()

SCIP_RETCODE SCIPbenderscutExec ( SCIP_BENDERSCUT benderscut,
SCIP_SET set,
SCIP_BENDERS benders,
SCIP_SOL sol,
int  probnumber,
SCIP_BENDERSENFOTYPE  type,
SCIP_RESULT result 
)

calls execution method of the Benders' decomposition cut

Parameters
benderscutBenders' decomposition cut
setglobal SCIP settings
bendersBenders' decomposition
solprimal CIP solution
probnumberthe number of the subproblem for which the cut is generated
typethe enforcement type calling this function
resultpointer to store the result of the callback method

Definition at line 346 of file benderscut.c.

References SCIP_Benderscut::benderscutclock, SCIP_Benderscut::enabled, SCIP_Benderscut::name, SCIP_Benderscut::ncalls, SCIP_Benderscut::nfound, NULL, SCIP_CALL, SCIP_CONSADDED, SCIP_DIDNOTFIND, SCIP_DIDNOTRUN, SCIP_FEASIBLE, SCIP_INVALIDRESULT, SCIP_OKAY, SCIP_SEPARATED, SCIPclockStart(), SCIPclockStop(), SCIPerrorMessage, and SCIPsetDebugMsg.

Referenced by generateBendersCuts().

◆ SCIPbenderscutSetCopy()

void SCIPbenderscutSetCopy ( SCIP_BENDERSCUT benderscut,
SCIP_DECL_BENDERSCUTCOPY((*benderscutcopy))   
)

sets copy callback of the Benders' decomposition cut

Parameters
benderscutBenders' decomposition cut

Definition at line 426 of file benderscut.c.

References NULL.

Referenced by SCIPsetBenderscutCopy().

◆ SCIPbenderscutSetFree()

void SCIPbenderscutSetFree ( SCIP_BENDERSCUT benderscut,
SCIP_DECL_BENDERSCUTFREE((*benderscutfree))   
)

sets destructor callback of the Benders' decomposition cut

Parameters
benderscutBenders' decomposition cut

Definition at line 437 of file benderscut.c.

References NULL.

Referenced by SCIPsetBenderscutFree().

◆ SCIPbenderscutSetInit()

void SCIPbenderscutSetInit ( SCIP_BENDERSCUT benderscut,
SCIP_DECL_BENDERSCUTINIT((*benderscutinit))   
)

sets initialization callback of the Benders' decomposition cut

Parameters
benderscutBenders' decomposition cut

Definition at line 448 of file benderscut.c.

References NULL.

Referenced by SCIPsetBenderscutInit().

◆ SCIPbenderscutSetExit()

void SCIPbenderscutSetExit ( SCIP_BENDERSCUT benderscut,
SCIP_DECL_BENDERSCUTEXIT((*benderscutexit))   
)

sets deinitialization callback of the Benders' decomposition cut

Parameters
benderscutBenders' decomposition cut

Definition at line 459 of file benderscut.c.

References NULL.

Referenced by SCIPsetBenderscutExit().

◆ SCIPbenderscutSetInitsol()

void SCIPbenderscutSetInitsol ( SCIP_BENDERSCUT benderscut,
SCIP_DECL_BENDERSCUTINITSOL((*benderscutinitsol))   
)

sets solving process initialization callback of the Benders' decomposition cut

Parameters
benderscutBenders' decomposition cut

Definition at line 470 of file benderscut.c.

References NULL.

Referenced by SCIPsetBenderscutInitsol().

◆ SCIPbenderscutSetExitsol()

void SCIPbenderscutSetExitsol ( SCIP_BENDERSCUT benderscut,
SCIP_DECL_BENDERSCUTEXITSOL((*benderscutexitsol))   
)

sets solving process deinitialization callback of Benders' decomposition cut

Parameters
benderscutBenders' decomposition cut

Definition at line 481 of file benderscut.c.

References NULL.

Referenced by SCIPsetBenderscutExitsol().

◆ SCIPbenderscutSetPriority()

void SCIPbenderscutSetPriority ( SCIP_BENDERSCUT benderscut,
int  priority 
)

sets priority of the Benders' decomposition cut

Parameters
benderscutBenders' decomposition cut
prioritynew priority of the Benders' decomposition cut

Definition at line 522 of file benderscut.c.

References NULL, and SCIP_Benderscut::priority.

Referenced by SCIPsetBenderscutPriority().