Scippy

SCIP

Solving Constraint Integer Programs

sepa.c File Reference

Detailed Description

methods and datastructures for separators

Author
Tobias Achterberg
Timo Berthold

Definition in file sepa.c.

#include <assert.h>
#include <string.h>
#include "scip/def.h"
#include "scip/set.h"
#include "scip/stat.h"
#include "scip/clock.h"
#include "scip/paramset.h"
#include "scip/sepastore.h"
#include "scip/scip.h"
#include "scip/sepa.h"
#include "scip/pub_message.h"
#include "scip/pub_misc.h"
#include "scip/struct_sepa.h"

Go to the source code of this file.

Functions

 SCIP_DECL_SORTPTRCOMP (SCIPsepaComp)
 
 SCIP_DECL_SORTPTRCOMP (SCIPsepaCompName)
 
static SCIP_DECL_PARAMCHGD (paramChgdSepaPriority)
 
SCIP_RETCODE SCIPsepaCopyInclude (SCIP_SEPA *sepa, SCIP_SET *set)
 
static SCIP_RETCODE doSepaCreate (SCIP_SEPA **sepa, SCIP_SET *set, SCIP_MESSAGEHDLR *messagehdlr, BMS_BLKMEM *blkmem, const char *name, const char *desc, int priority, int freq, SCIP_Real maxbounddist, SCIP_Bool usessubscip, SCIP_Bool delay, SCIP_DECL_SEPACOPY((*sepacopy)), SCIP_DECL_SEPAFREE((*sepafree)), SCIP_DECL_SEPAINIT((*sepainit)), SCIP_DECL_SEPAEXIT((*sepaexit)), SCIP_DECL_SEPAINITSOL((*sepainitsol)), SCIP_DECL_SEPAEXITSOL((*sepaexitsol)), SCIP_DECL_SEPAEXECLP((*sepaexeclp)), SCIP_DECL_SEPAEXECSOL((*sepaexecsol)), SCIP_SEPADATA *sepadata)
 
SCIP_RETCODE SCIPsepaCreate (SCIP_SEPA **sepa, SCIP_SET *set, SCIP_MESSAGEHDLR *messagehdlr, BMS_BLKMEM *blkmem, const char *name, const char *desc, int priority, int freq, SCIP_Real maxbounddist, SCIP_Bool usessubscip, SCIP_Bool delay, SCIP_DECL_SEPACOPY((*sepacopy)), SCIP_DECL_SEPAFREE((*sepafree)), SCIP_DECL_SEPAINIT((*sepainit)), SCIP_DECL_SEPAEXIT((*sepaexit)), SCIP_DECL_SEPAINITSOL((*sepainitsol)), SCIP_DECL_SEPAEXITSOL((*sepaexitsol)), SCIP_DECL_SEPAEXECLP((*sepaexeclp)), SCIP_DECL_SEPAEXECSOL((*sepaexecsol)), SCIP_SEPADATA *sepadata)
 
SCIP_RETCODE SCIPsepaFree (SCIP_SEPA **sepa, SCIP_SET *set)
 
SCIP_RETCODE SCIPsepaInit (SCIP_SEPA *sepa, SCIP_SET *set)
 
SCIP_RETCODE SCIPsepaExit (SCIP_SEPA *sepa, SCIP_SET *set)
 
SCIP_RETCODE SCIPsepaInitsol (SCIP_SEPA *sepa, SCIP_SET *set)
 
SCIP_RETCODE SCIPsepaExitsol (SCIP_SEPA *sepa, SCIP_SET *set)
 
SCIP_RETCODE SCIPsepaExecLP (SCIP_SEPA *sepa, SCIP_SET *set, SCIP_STAT *stat, SCIP_SEPASTORE *sepastore, int depth, SCIP_Real bounddist, SCIP_Bool allowlocal, SCIP_Bool execdelayed, SCIP_RESULT *result)
 
SCIP_RETCODE SCIPsepaExecSol (SCIP_SEPA *sepa, SCIP_SET *set, SCIP_STAT *stat, SCIP_SEPASTORE *sepastore, SCIP_SOL *sol, int depth, SCIP_Bool allowlocal, SCIP_Bool execdelayed, SCIP_RESULT *result)
 
SCIP_SEPADATASCIPsepaGetData (SCIP_SEPA *sepa)
 
void SCIPsepaSetData (SCIP_SEPA *sepa, SCIP_SEPADATA *sepadata)
 
void SCIPsepaSetCopy (SCIP_SEPA *sepa, SCIP_DECL_SEPACOPY((*sepacopy)))
 
void SCIPsepaSetFree (SCIP_SEPA *sepa, SCIP_DECL_SEPAFREE((*sepafree)))
 
void SCIPsepaSetInit (SCIP_SEPA *sepa, SCIP_DECL_SEPAINIT((*sepainit)))
 
void SCIPsepaSetExit (SCIP_SEPA *sepa, SCIP_DECL_SEPAEXIT((*sepaexit)))
 
void SCIPsepaSetInitsol (SCIP_SEPA *sepa, SCIP_DECL_SEPAINITSOL((*sepainitsol)))
 
void SCIPsepaSetExitsol (SCIP_SEPA *sepa, SCIP_DECL_SEPAEXITSOL((*sepaexitsol)))
 
const char * SCIPsepaGetName (SCIP_SEPA *sepa)
 
const char * SCIPsepaGetDesc (SCIP_SEPA *sepa)
 
int SCIPsepaGetPriority (SCIP_SEPA *sepa)
 
void SCIPsepaSetPriority (SCIP_SEPA *sepa, SCIP_SET *set, int priority)
 
int SCIPsepaGetFreq (SCIP_SEPA *sepa)
 
void SCIPsepaSetFreq (SCIP_SEPA *sepa, int freq)
 
SCIP_Real SCIPsepaGetMaxbounddist (SCIP_SEPA *sepa)
 
SCIP_Bool SCIPsepaUsesSubscip (SCIP_SEPA *sepa)
 
void SCIPsepaEnableOrDisableClocks (SCIP_SEPA *sepa, SCIP_Bool enable)
 
SCIP_Real SCIPsepaGetSetupTime (SCIP_SEPA *sepa)
 
SCIP_Real SCIPsepaGetTime (SCIP_SEPA *sepa)
 
SCIP_Longint SCIPsepaGetNCalls (SCIP_SEPA *sepa)
 
int SCIPsepaGetNCallsAtNode (SCIP_SEPA *sepa)
 
SCIP_Longint SCIPsepaGetNCutoffs (SCIP_SEPA *sepa)
 
SCIP_Longint SCIPsepaGetNCutsFound (SCIP_SEPA *sepa)
 
SCIP_Longint SCIPsepaGetNCutsApplied (SCIP_SEPA *sepa)
 
void SCIPsepaIncNAppliedCuts (SCIP_SEPA *sepa)
 
void SCIPsepaIncNCutsFound (SCIP_SEPA *sepa)
 
void SCIPsepaIncNCutsFoundAtNode (SCIP_SEPA *sepa)
 
SCIP_Longint SCIPsepaGetNCutsFoundAtNode (SCIP_SEPA *sepa)
 
SCIP_Longint SCIPsepaGetNConssFound (SCIP_SEPA *sepa)
 
SCIP_Longint SCIPsepaGetNDomredsFound (SCIP_SEPA *sepa)
 
SCIP_Bool SCIPsepaIsDelayed (SCIP_SEPA *sepa)
 
SCIP_Bool SCIPsepaWasLPDelayed (SCIP_SEPA *sepa)
 
SCIP_Bool SCIPsepaWasSolDelayed (SCIP_SEPA *sepa)
 
SCIP_Bool SCIPsepaIsInitialized (SCIP_SEPA *sepa)
 

Function Documentation

◆ SCIP_DECL_PARAMCHGD()

static SCIP_DECL_PARAMCHGD ( paramChgdSepaPriority  )
static

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

Definition at line 55 of file sepa.c.

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

◆ SCIPsepaCopyInclude()

SCIP_RETCODE SCIPsepaCopyInclude ( SCIP_SEPA sepa,
SCIP_SET set 
)

copies the given separator to a new scip

Parameters
sepaseparator
setSCIP_SET of SCIP to copy to

Definition at line 69 of file sepa.c.

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

◆ doSepaCreate()

static SCIP_RETCODE doSepaCreate ( SCIP_SEPA **  sepa,
SCIP_SET set,
SCIP_MESSAGEHDLR messagehdlr,
BMS_BLKMEM blkmem,
const char *  name,
const char *  desc,
int  priority,
int  freq,
SCIP_Real  maxbounddist,
SCIP_Bool  usessubscip,
SCIP_Bool  delay,
SCIP_DECL_SEPACOPY((*sepacopy))  ,
SCIP_DECL_SEPAFREE((*sepafree))  ,
SCIP_DECL_SEPAINIT((*sepainit))  ,
SCIP_DECL_SEPAEXIT((*sepaexit))  ,
SCIP_DECL_SEPAINITSOL((*sepainitsol))  ,
SCIP_DECL_SEPAEXITSOL((*sepaexitsol))  ,
SCIP_DECL_SEPAEXECLP((*sepaexeclp))  ,
SCIP_DECL_SEPAEXECSOL((*sepaexecsol))  ,
SCIP_SEPADATA sepadata 
)
static

internal method for creating a separator

Parameters
sepapointer to separator data structure
setglobal SCIP settings
messagehdlrmessage handler
blkmemblock memory for parameter settings
namename of separator
descdescription of separator
prioritypriority of separator (>= 0: before, < 0: after constraint handlers)
freqfrequency for calling separator
maxbounddistmaximal relative distance from current node's dual bound to primal bound compared to best node's dual bound for applying separation
usessubscipdoes the separator use a secondary SCIP instance?
delayshould separator be delayed, if other separators found cuts?
sepadataseparator data

Definition at line 88 of file sepa.c.

References BMSallocMemory, BMSclearMemory, BMSduplicateMemoryArray, FALSE, NULL, SCIP_ALLOC, SCIP_CALL, SCIP_CLOCKTYPE_DEFAULT, SCIP_MAXSTRLEN, SCIP_MAXTREEDEPTH, SCIP_OKAY, SCIPclockCreate(), SCIPsetAddBoolParam(), SCIPsetAddIntParam(), SCIPsetAddRealParam(), SCIPsnprintf(), and TRUE.

Referenced by SCIPsepaCreate().

◆ SCIPsepaCreate()

SCIP_RETCODE SCIPsepaCreate ( SCIP_SEPA **  sepa,
SCIP_SET set,
SCIP_MESSAGEHDLR messagehdlr,
BMS_BLKMEM blkmem,
const char *  name,
const char *  desc,
int  priority,
int  freq,
SCIP_Real  maxbounddist,
SCIP_Bool  usessubscip,
SCIP_Bool  delay,
SCIP_DECL_SEPACOPY((*sepacopy))  ,
SCIP_DECL_SEPAFREE((*sepafree))  ,
SCIP_DECL_SEPAINIT((*sepainit))  ,
SCIP_DECL_SEPAEXIT((*sepaexit))  ,
SCIP_DECL_SEPAINITSOL((*sepainitsol))  ,
SCIP_DECL_SEPAEXITSOL((*sepaexitsol))  ,
SCIP_DECL_SEPAEXECLP((*sepaexeclp))  ,
SCIP_DECL_SEPAEXECSOL((*sepaexecsol))  ,
SCIP_SEPADATA sepadata 
)

creates a separator

Parameters
sepapointer to separator data structure
setglobal SCIP settings
messagehdlrmessage handler
blkmemblock memory for parameter settings
namename of separator
descdescription of separator
prioritypriority of separator (>= 0: before, < 0: after constraint handlers)
freqfrequency for calling separator
maxbounddistmaximal relative distance from current node's dual bound to primal bound compared to best node's dual bound for applying separation
usessubscipdoes the separator use a secondary SCIP instance?
delayshould separator be delayed, if other separators found cuts?
sepadataseparator data

Definition at line 187 of file sepa.c.

References doSepaCreate(), NULL, SCIP_CALL_FINALLY, SCIP_OKAY, and SCIPsepaFree().

Referenced by SCIPincludeSepa(), and SCIPincludeSepaBasic().

◆ SCIPsepaFree()

SCIP_RETCODE SCIPsepaFree ( SCIP_SEPA **  sepa,
SCIP_SET set 
)

calls destructor and frees memory of separator

Parameters
sepapointer to separator data structure
setglobal SCIP settings

Definition at line 226 of file sepa.c.

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

Referenced by SCIPsepaCreate().

◆ SCIPsepaInit()

◆ SCIPsepaExit()

SCIP_RETCODE SCIPsepaExit ( SCIP_SEPA sepa,
SCIP_SET set 
)

calls exit method of separator

Parameters
sepaseparator
setglobal SCIP settings

Definition at line 301 of file sepa.c.

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

Referenced by SCIPsetInitPlugins().

◆ SCIPsepaInitsol()

SCIP_RETCODE SCIPsepaInitsol ( SCIP_SEPA sepa,
SCIP_SET set 
)

informs separator that the branch and bound process is being started

Parameters
sepaseparator
setglobal SCIP settings

Definition at line 331 of file sepa.c.

References FALSE, SCIP_Sepa::lpwasdelayed, NULL, SCIP_CALL, SCIP_OKAY, SCIPclockStart(), SCIPclockStop(), SCIP_Sepa::setuptime, and SCIP_Sepa::solwasdelayed.

Referenced by SCIPsetExitprePlugins().

◆ SCIPsepaExitsol()

SCIP_RETCODE SCIPsepaExitsol ( SCIP_SEPA sepa,
SCIP_SET set 
)

informs separator that the branch and bound process data is being freed

Parameters
sepaseparator
setglobal SCIP settings

Definition at line 358 of file sepa.c.

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

Referenced by SCIPsetInitsolPlugins().

◆ SCIPsepaExecLP()

SCIP_RETCODE SCIPsepaExecLP ( SCIP_SEPA sepa,
SCIP_SET set,
SCIP_STAT stat,
SCIP_SEPASTORE sepastore,
int  depth,
SCIP_Real  bounddist,
SCIP_Bool  allowlocal,
SCIP_Bool  execdelayed,
SCIP_RESULT result 
)

calls LP separation method of separator

Parameters
sepaseparator
setglobal SCIP settings
statdynamic problem statistics
sepastoreseparation storage
depthdepth of current node
bounddistcurrent relative distance of local dual bound to global dual bound
allowlocalshould the separator be asked to separate local cuts
execdelayedexecute separator even if it is marked to be delayed
resultpointer to store the result of the callback method

Definition at line 382 of file sepa.c.

References SCIP_Sepa::delay, SCIP_Sepa::expbackoff, SCIP_Sepa::freq, SCIP_Sepa::lastsepanode, LOG2, SCIP_Sepa::lpwasdelayed, MAX, SCIP_Sepa::maxbounddist, SCIP_Stat::nactiveconss, SCIP_Sepa::name, SCIP_Stat::nboundchgs, SCIP_Sepa::ncalls, SCIP_Sepa::ncallsatnode, SCIP_Sepa::nconssfound, SCIP_Sepa::ncutoffs, SCIP_Sepa::ncutsfound, SCIP_Sepa::ncutsfoundatnode, SCIP_Sepa::ndomredsfound, SCIP_Stat::nholechgs, SCIP_Stat::nprobboundchgs, SCIP_Stat::nprobholechgs, SCIP_Stat::ntotalnodes, NULL, SCIP_CALL, SCIP_CONSADDED, SCIP_CUTOFF, SCIP_DELAYED, SCIP_DIDNOTFIND, SCIP_DIDNOTRUN, SCIP_INVALIDRESULT, SCIP_Longint, SCIP_NEWROUND, SCIP_OKAY, SCIP_Real, SCIP_REDUCEDDOM, SCIP_SEPARATED, SCIPclockStart(), SCIPclockStop(), SCIPcutpoolGetNCuts(), SCIPerrorMessage, SCIPgetDelayedGlobalCutpool(), SCIPgetGlobalCutpool(), SCIPsepastoreGetNCuts(), SCIPsetDebugMsg, SCIPsetIsIntegral(), SCIPsetIsLE(), and SCIP_Sepa::sepaclock.

Referenced by separationRoundLP().

◆ SCIPsepaExecSol()

SCIP_RETCODE SCIPsepaExecSol ( SCIP_SEPA sepa,
SCIP_SET set,
SCIP_STAT stat,
SCIP_SEPASTORE sepastore,
SCIP_SOL sol,
int  depth,
SCIP_Bool  allowlocal,
SCIP_Bool  execdelayed,
SCIP_RESULT result 
)

calls primal solution separation method of separator

Parameters
sepaseparator
setglobal SCIP settings
statdynamic problem statistics
sepastoreseparation storage
solprimal solution that should be separated
depthdepth of current node
allowlocalshould the separator allow local cuts
execdelayedexecute separator even if it is marked to be delayed
resultpointer to store the result of the callback method

Definition at line 499 of file sepa.c.

References SCIP_Sepa::delay, SCIP_Sepa::expbackoff, SCIP_Sepa::freq, SCIP_Sepa::lastsepanode, LOG2, MAX, SCIP_Stat::nactiveconss, SCIP_Sepa::name, SCIP_Stat::nboundchgs, SCIP_Sepa::ncalls, SCIP_Sepa::ncallsatnode, SCIP_Sepa::nconssfound, SCIP_Sepa::ncutoffs, SCIP_Sepa::ncutsfound, SCIP_Sepa::ncutsfoundatnode, SCIP_Sepa::ndomredsfound, SCIP_Stat::nholechgs, SCIP_Stat::nprobboundchgs, SCIP_Stat::nprobholechgs, SCIP_Stat::ntotalnodes, NULL, SCIP_CALL, SCIP_CONSADDED, SCIP_CUTOFF, SCIP_DELAYED, SCIP_DIDNOTFIND, SCIP_DIDNOTRUN, SCIP_INVALIDRESULT, SCIP_Longint, SCIP_NEWROUND, SCIP_OKAY, SCIP_Real, SCIP_REDUCEDDOM, SCIP_SEPARATED, SCIPclockStart(), SCIPclockStop(), SCIPerrorMessage, SCIPsepastoreGetNCuts(), SCIPsetDebugMsg, SCIPsetIsIntegral(), SCIP_Sepa::sepaclock, and SCIP_Sepa::solwasdelayed.

Referenced by separationRoundSol().

◆ SCIPsepaSetCopy()

void SCIPsepaSetCopy ( SCIP_SEPA sepa,
SCIP_DECL_SEPACOPY((*sepacopy))   
)

sets copy method of separator

Parameters
sepaseparator

Definition at line 630 of file sepa.c.

References NULL.

Referenced by SCIPsetSepaCopy().

◆ SCIPsepaSetFree()

void SCIPsepaSetFree ( SCIP_SEPA sepa,
SCIP_DECL_SEPAFREE((*sepafree))   
)

sets destructor method of separator

Parameters
sepaseparator

Definition at line 641 of file sepa.c.

References NULL.

Referenced by SCIPsetSepaFree().

◆ SCIPsepaSetInit()

void SCIPsepaSetInit ( SCIP_SEPA sepa,
SCIP_DECL_SEPAINIT((*sepainit))   
)

sets initialization method of separator

Parameters
sepaseparator

Definition at line 652 of file sepa.c.

References NULL.

Referenced by SCIPsetSepaInit().

◆ SCIPsepaSetExit()

void SCIPsepaSetExit ( SCIP_SEPA sepa,
SCIP_DECL_SEPAEXIT((*sepaexit))   
)

sets deinitialization method of separator

Parameters
sepaseparator

Definition at line 663 of file sepa.c.

References NULL.

Referenced by SCIPsetSepaExit().

◆ SCIPsepaSetInitsol()

void SCIPsepaSetInitsol ( SCIP_SEPA sepa,
SCIP_DECL_SEPAINITSOL((*sepainitsol))   
)

sets solving process initialization method of separator

Parameters
sepaseparator

Definition at line 674 of file sepa.c.

References NULL.

Referenced by SCIPsetSepaInitsol().

◆ SCIPsepaSetExitsol()

void SCIPsepaSetExitsol ( SCIP_SEPA sepa,
SCIP_DECL_SEPAEXITSOL((*sepaexitsol))   
)

sets solving process deinitialization method of separator

Parameters
sepaseparator

Definition at line 685 of file sepa.c.

References NULL.

Referenced by SCIPsetSepaExitsol().

◆ SCIPsepaSetPriority()

void SCIPsepaSetPriority ( SCIP_SEPA sepa,
SCIP_SET set,
int  priority 
)

sets priority of separator

Parameters
sepaseparator
setglobal SCIP settings
prioritynew priority of the separator

Definition at line 726 of file sepa.c.

References FALSE, NULL, and SCIP_Sepa::priority.

Referenced by SCIPsetSepaPriority().

◆ SCIPsepaEnableOrDisableClocks()

void SCIPsepaEnableOrDisableClocks ( SCIP_SEPA sepa,
SCIP_Bool  enable 
)

enables or disables all clocks of sepa, depending on the value of the flag

Parameters
sepathe separator for which all clocks should be enabled or disabled
enableshould the clocks of the separator be enabled?

Definition at line 781 of file sepa.c.

References NULL, SCIPclockEnableOrDisable(), SCIP_Sepa::sepaclock, and SCIP_Sepa::setuptime.

◆ SCIPsepaIncNAppliedCuts()

void SCIPsepaIncNAppliedCuts ( SCIP_SEPA sepa)

increase count of applied cuts

Parameters
sepaseparator

Definition at line 863 of file sepa.c.

References SCIP_Sepa::ncutsapplied, and NULL.

Referenced by sepastoreApplyCut().

◆ SCIPsepaIncNCutsFound()

void SCIPsepaIncNCutsFound ( SCIP_SEPA sepa)

increase count of found cuts

Parameters
sepaseparator

Definition at line 873 of file sepa.c.

References SCIP_Sepa::ncutsfound, and NULL.

Referenced by SCIPcutpoolSeparate().

◆ SCIPsepaIncNCutsFoundAtNode()

void SCIPsepaIncNCutsFoundAtNode ( SCIP_SEPA sepa)

increase count of found cuts at current node

Parameters
sepaseparator

Definition at line 883 of file sepa.c.

References SCIP_Sepa::ncutsfoundatnode, and NULL.

Referenced by SCIPcutpoolSeparate().