Detailed Description

constraint handler for (partitioning/packing) orbitope constraints w.r.t. the full symmetric group

Author: Timo Berthold; Marc Pfetsch

The type of constraints of this constraint handler is described in cons_orbitope.h.

The details of the method implemented here are described in the following papers.

Packing and Partitioning Orbitopes
Volker Kaibel and Marc E. Pfetsch,
Math. Program. 114, No. 1, 1-36 (2008)

Among other things, this paper describes so-called shifted column inequalities of the following form \(x(S) \leq x(B)\), where \(S\) is a so-called shifted column and \(B\) is a so-called bar. These inequalities can be used to handle symmetry and they are separated in this constraint handler. We use the linear time separation algorithm of the paper.

Orbitopal Fixing
Volker Kaibel, Matthias Peinhardt, and Marc E. Pfetsch,
Discrete Optimization 8, No. 4, 595-610 (2011) (A preliminary version appears in Proc. IPCO 2007.)

In this paper a linear time propagation algorithm is described, a variant of which is implemented here. The implemented variant does not run in linear time, but is very fast in practice.

translation table
here	paper

nspcons	p
nblocks	q
vars	x
vals	A^\star
weights	\omega
cases	\tau
fixtriangle	–
resolveprop	–
firstnonzeros	\mu
lastones	\alpha
frontiersteps	\Gamma

Definition in file cons_orbitope.c.

#include <assert.h>
#include <string.h>
#include <ctype.h>
#include "scip/cons_orbitope.h"

Go to the source code of this file.

Macros
#define	CONSHDLR_NAME "orbitope"

#define	CONSHDLR_DESC "symmetry breaking constraint handler relying on (partitioning/packing) orbitopes"

#define	CONSHDLR_SEPAPRIORITY +40100

#define	CONSHDLR_ENFOPRIORITY -1005200

#define	CONSHDLR_CHECKPRIORITY -1005200

#define	CONSHDLR_SEPAFREQ 5

#define	CONSHDLR_PROPFREQ -1

#define	CONSHDLR_EAGERFREQ -1

#define	CONSHDLR_MAXPREROUNDS -1

#define	CONSHDLR_DELAYSEPA FALSE

#define	CONSHDLR_DELAYPROP FALSE

#define	CONSHDLR_NEEDSCONS TRUE

#define	CONSHDLR_PROP_TIMING SCIP_PROPTIMING_BEFORELP

#define	CONSHDLR_PRESOLTIMING SCIP_PRESOLTIMING_MEDIUM

Functions
static SCIP_RETCODE	consdataFree (SCIP scip, SCIP_CONSDATA *consdata)

static SCIP_RETCODE	consdataCreate (SCIP scip, SCIP_CONSDATA consdata, SCIP_VAR **vars, int nspcons, int nblocks, SCIP_Bool ispart, SCIP_Bool resolveprop)

static void	copyValues (SCIP scip, SCIP_CONSDATA consdata, SCIP_SOL *sol)

static void	computeSCTable (SCIP scip, int nspcons, int nblocks, SCIP_Real weights, int cases, SCIP_Real *vals)

static SCIP_RETCODE	fixTriangle (SCIP scip, SCIP_CONS cons, SCIP_Bool infeasible, int nfixedvars)

static SCIP_RETCODE	separateSCIs (SCIP scip, SCIP_CONSHDLR conshdlr, SCIP_CONS cons, SCIP_CONSDATA consdata, SCIP_Bool infeasible, int nfixedvars, int *ncuts)

static SCIP_RETCODE	propagateCons (SCIP scip, SCIP_CONS cons, SCIP_Bool infeasible, int nfixedvars)

static SCIP_RETCODE	resolvePropagation (SCIP scip, SCIP_CONS cons, SCIP_VAR infervar, int inferinfo, SCIP_BOUNDTYPE boundtype, SCIP_BDCHGIDX bdchgidx, SCIP_RESULT *result)

static SCIP_RETCODE	separateConstraints (SCIP scip, SCIP_CONSHDLR conshdlr, SCIP_CONS *conss, int nconss, int nusefulconss, SCIP_SOL sol, SCIP_RESULT *result)

static	SCIP_DECL_CONSHDLRCOPY (conshdlrCopyOrbitope)

static	SCIP_DECL_CONSDELETE (consDeleteOrbitope)

static	SCIP_DECL_CONSTRANS (consTransOrbitope)

static	SCIP_DECL_CONSSEPALP (consSepalpOrbitope)

static	SCIP_DECL_CONSSEPASOL (consSepasolOrbitope)

static	SCIP_DECL_CONSENFOLP (consEnfolpOrbitope)

static	SCIP_DECL_CONSENFORELAX (consEnforelaxOrbitope)

static	SCIP_DECL_CONSENFOPS (consEnfopsOrbitope)

static	SCIP_DECL_CONSCHECK (consCheckOrbitope)

static	SCIP_DECL_CONSPROP (consPropOrbitope)

static	SCIP_DECL_CONSPRESOL (consPresolOrbitope)

static	SCIP_DECL_CONSRESPROP (consRespropOrbitope)

static	SCIP_DECL_CONSLOCK (consLockOrbitope)

static	SCIP_DECL_CONSPRINT (consPrintOrbitope)

static	SCIP_DECL_CONSCOPY (consCopyOrbitope)

static	SCIP_DECL_CONSPARSE (consParseOrbitope)

static	SCIP_DECL_CONSGETVARS (consGetVarsOrbitope)

static	SCIP_DECL_CONSGETNVARS (consGetNVarsOrbitope)

SCIP_RETCODE	SCIPincludeConshdlrOrbitope (SCIP *scip)

SCIP_RETCODE	SCIPcreateConsOrbitope (SCIP scip, SCIP_CONS cons, const char name, SCIP_VAR ***vars, SCIP_Bool ispart, int nspcons, int nblocks, SCIP_Bool resolveprop, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)

SCIP_RETCODE	SCIPcreateConsBasicOrbitope (SCIP scip, SCIP_CONS cons, const char name, SCIP_VAR ***vars, SCIP_Bool ispart, int nspcons, int nblocks, SCIP_Bool resolveprop)

Macro Definition Documentation

◆ CONSHDLR_NAME

#define CONSHDLR_NAME "orbitope"

Definition at line 69 of file cons_orbitope.c.

Referenced by SCIP_DECL_CONSCHECK(), SCIP_DECL_CONSCOPY(), SCIP_DECL_CONSDELETE(), SCIP_DECL_CONSENFOPS(), SCIP_DECL_CONSHDLRCOPY(), SCIP_DECL_CONSLOCK(), SCIP_DECL_CONSPRESOL(), SCIP_DECL_CONSPRINT(), SCIP_DECL_CONSPROP(), SCIP_DECL_CONSTRANS(), SCIPcreateConsOrbitope(), SCIPincludeConshdlrOrbitope(), and separateConstraints().

◆ CONSHDLR_DESC

#define CONSHDLR_DESC "symmetry breaking constraint handler relying on (partitioning/packing) orbitopes"

Definition at line 70 of file cons_orbitope.c.

Referenced by SCIPincludeConshdlrOrbitope().

◆ CONSHDLR_SEPAPRIORITY

#define CONSHDLR_SEPAPRIORITY +40100

priority of the constraint handler for separation

Definition at line 71 of file cons_orbitope.c.

Referenced by SCIPincludeConshdlrOrbitope().

◆ CONSHDLR_ENFOPRIORITY

#define CONSHDLR_ENFOPRIORITY -1005200

priority of the constraint handler for constraint enforcing

Definition at line 72 of file cons_orbitope.c.

Referenced by SCIPincludeConshdlrOrbitope().

◆ CONSHDLR_CHECKPRIORITY

#define CONSHDLR_CHECKPRIORITY -1005200

priority of the constraint handler for checking feasibility

Definition at line 73 of file cons_orbitope.c.

Referenced by SCIPincludeConshdlrOrbitope().

◆ CONSHDLR_SEPAFREQ

#define CONSHDLR_SEPAFREQ 5

frequency for separating cuts; zero means to separate only in the root node

Definition at line 74 of file cons_orbitope.c.

Referenced by SCIPincludeConshdlrOrbitope().

◆ CONSHDLR_PROPFREQ

#define CONSHDLR_PROPFREQ -1

frequency for propagating domains; zero means only preprocessing propagation

Definition at line 75 of file cons_orbitope.c.

Referenced by SCIPincludeConshdlrOrbitope().

◆ CONSHDLR_EAGERFREQ

#define CONSHDLR_EAGERFREQ -1

frequency for using all instead of only the useful constraints in separation, propagation and enforcement, -1 for no eager evaluations, 0 for first only

Definition at line 76 of file cons_orbitope.c.

Referenced by SCIPincludeConshdlrOrbitope().

◆ CONSHDLR_MAXPREROUNDS

#define CONSHDLR_MAXPREROUNDS -1

maximal number of presolving rounds the constraint handler participates in (-1: no limit)

Definition at line 79 of file cons_orbitope.c.

Referenced by SCIPincludeConshdlrOrbitope().

◆ CONSHDLR_DELAYSEPA

#define CONSHDLR_DELAYSEPA FALSE

should separation method be delayed, if other separators found cuts?

Definition at line 80 of file cons_orbitope.c.

Referenced by SCIPincludeConshdlrOrbitope().

◆ CONSHDLR_DELAYPROP

#define CONSHDLR_DELAYPROP FALSE

should propagation method be delayed, if other propagators found reductions?

Definition at line 81 of file cons_orbitope.c.

Referenced by SCIPincludeConshdlrOrbitope().

◆ CONSHDLR_NEEDSCONS

#define CONSHDLR_NEEDSCONS TRUE

should the constraint handler be skipped, if no constraints are available?

Definition at line 82 of file cons_orbitope.c.

Referenced by SCIPincludeConshdlrOrbitope().

◆ CONSHDLR_PROP_TIMING

#define CONSHDLR_PROP_TIMING SCIP_PROPTIMING_BEFORELP

propagation timing mask of the constraint handler

Definition at line 84 of file cons_orbitope.c.

Referenced by SCIPincludeConshdlrOrbitope().

◆ CONSHDLR_PRESOLTIMING

#define CONSHDLR_PRESOLTIMING SCIP_PRESOLTIMING_MEDIUM

presolving timing of the constraint handler (fast, medium, or exhaustive)

Definition at line 85 of file cons_orbitope.c.

Referenced by SCIPincludeConshdlrOrbitope().

Function Documentation

◆ consdataFree()

static SCIP_RETCODE consdataFree	(	SCIP *	scip,
		SCIP_CONSDATA **	consdata
	)

static

frees an orbitope constraint data

Parameters

scip	SCIP data structure
consdata	pointer to orbitope constraint data

Definition at line 115 of file cons_orbitope.c.

References consdataCreate(), NULL, SCIP_OKAY, SCIPfreeBlockMemory, and SCIPfreeBlockMemoryArrayNull.

Referenced by SCIP_DECL_CONSDELETE().

◆ consdataCreate()

static SCIP_RETCODE consdataCreate	(	SCIP *	scip,
		SCIP_CONSDATA **	consdata,
		SCIP_VAR ***	vars,
		int	nspcons,
		int	nblocks,
		SCIP_Bool	ispart,
		SCIP_Bool	resolveprop
	)

static

creates orbitope constraint data

Parameters

scip	SCIP data structure
consdata	pointer to store constraint data
vars	variables array, must have size nspcons x nblocks
nspcons	number of set partitioning (packing) constraints <=> p
nblocks	number of symmetric variable blocks <=> q
ispart	deal with the partitioning case (packing otherwise)
resolveprop	should propagation be resolved?

Definition at line 153 of file cons_orbitope.c.

References copyValues(), FALSE, NULL, REALABS, SCIP_CALL, SCIP_OKAY, SCIPABORT, SCIPallocBlockMemory, SCIPallocBlockMemoryArray, SCIPallocBufferArray, SCIPduplicateBlockMemoryArray, SCIPerrorMessage, SCIPfreeBufferArray, SCIPgetTransformedVar(), SCIPinfoMessage(), SCIPisTransformed(), SCIPmarkDoNotMultaggrVar(), SCIPvarGetLbLocal(), and SCIPvarGetUbLocal().

Referenced by consdataFree(), SCIP_DECL_CONSTRANS(), and SCIPcreateConsOrbitope().

◆ copyValues()

static void copyValues	(	SCIP *	scip,
		SCIP_CONSDATA *	consdata,
		SCIP_SOL *	sol
	)

static

copies the variables values from the solution to the constraint data structure

Parameters

scip	the SCIP data structure
consdata	the constraint data
sol	a primal solution or NULL for the current LP optimum

Definition at line 358 of file cons_orbitope.c.

References computeSCTable(), NULL, and SCIPgetSolVal().

Referenced by consdataCreate(), SCIP_DECL_CONSCHECK(), SCIP_DECL_CONSENFOPS(), and separateConstraints().

◆ computeSCTable()

static void computeSCTable	(	SCIP *	scip,
		int	nspcons,
		int	nblocks,
		SCIP_Real **	weights,
		int **	cases,
		SCIP_Real **	vals
	)

static

compute the dynamic programming table for SC

Build up dynamic programming table in order to find SCs with minimum weight.

The values of the minimal SCIs are stored in weights. The array cases[i][j] stores which of the cases were applied to get weights[i][j]. Here, 3 means that we have reached the upper limit.

We assume that the upper right triangle is fixed to 0. Hence we can perform the computation a bit more efficient.

Parameters

scip	SCIP pointer
nspcons	number of set partitioning (packing) constraints <=> p
nblocks	number of symmetric variable blocks <=> q
weights	SC weight table
cases	indicator of the SC cases
vals	current solution

Definition at line 394 of file cons_orbitope.c.

References fixTriangle(), NULL, SCIP_Real, and SCIPisLT().

Referenced by copyValues(), resolvePropagation(), SCIP_DECL_CONSCHECK(), SCIP_DECL_CONSENFOPS(), and separateSCIs().

◆ fixTriangle()

static SCIP_RETCODE fixTriangle	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_Bool *	infeasible,
		int *	nfixedvars
	)

static

fix upper right triangle if necessary

Parameters

scip	SCIP data structure
cons	constraint to be processed
infeasible	pointer to store TRUE, if the node can be cut off
nfixedvars	pointer to add up the number of found domain reductions

Definition at line 489 of file cons_orbitope.c.

References FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPconsGetData(), SCIPconsGetName(), SCIPdebugMsg, SCIPfixVar(), SCIPvarGetUbGlobal(), separateSCIs(), and TRUE.

Referenced by computeSCTable(), propagateCons(), SCIP_DECL_CONSENFOPS(), and separateSCIs().

◆ separateSCIs()

static SCIP_RETCODE separateSCIs	(	SCIP *	scip,
		SCIP_CONSHDLR *	conshdlr,
		SCIP_CONS *	cons,
		SCIP_CONSDATA *	consdata,
		SCIP_Bool *	infeasible,
		int *	nfixedvars,
		int *	ncuts
	)

static

separates shifted column inequalities according to the solution stored in consdata->vals

Parameters

scip	the SCIP data structure
conshdlr	constraint handler
cons	constraint
consdata	the constraint data
infeasible	whether we detected infeasibility
nfixedvars	pointer to store the number of variables fixed
ncuts	pointer to store number of separated SCIs

Definition at line 572 of file cons_orbitope.c.

References computeSCTable(), FALSE, fixTriangle(), NULL, propagateCons(), SCIP_CALL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIPaddCut(), SCIPaddVarsToRow(), SCIPcreateEmptyRowCons(), SCIPinfinity(), SCIPisEfficacious(), SCIPisSumEQ(), SCIPreleaseRow(), SCIPsnprintf(), and TRUE.

Referenced by fixTriangle(), and separateConstraints().

◆ propagateCons()

static SCIP_RETCODE propagateCons	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_Bool *	infeasible,
		int *	nfixedvars
	)

static

propagation method for a single orbitope constraint

Parameters

scip	SCIP data structure
cons	constraint to be processed
infeasible	pointer to store TRUE, if the node can be cut off
nfixedvars	pointer to add up the number of found domain reductions

Definition at line 732 of file cons_orbitope.c.

References FALSE, fixTriangle(), NULL, resolvePropagation(), SCIP_Bool, SCIP_CALL, SCIP_CONFTYPE_PROPAGATION, SCIP_OKAY, SCIP_STAGE_SOLVING, SCIPaddConflictBinvar(), SCIPallocBufferArray, SCIPallowDualReds(), SCIPanalyzeConflictCons(), SCIPconsGetData(), SCIPdebugMsg, SCIPfreeBufferArray, SCIPgetStage(), SCIPinferBinvarCons(), SCIPinitConflictAnalysis(), SCIPinProbing(), SCIPisConflictAnalysisApplicable(), SCIPvarGetLbLocal(), SCIPvarGetUbLocal(), and TRUE.

Referenced by SCIP_DECL_CONSPRESOL(), SCIP_DECL_CONSPROP(), and separateSCIs().

◆ resolvePropagation()

static SCIP_RETCODE resolvePropagation	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_VAR *	infervar,
		int	inferinfo,
		SCIP_BOUNDTYPE	boundtype,
		SCIP_BDCHGIDX *	bdchgidx,
		SCIP_RESULT *	result
	)

static

Propagation conflict resolving method of propagator

In this function we use that the propagation method above implicitly propagates SCIs, i.e., every fixing can also be gotten via an SCI-fixing.

Since the storage of an integer is not enough to store the complete information about the fixing nor a complete shifted column, we have to use the linear time algorithm for SCIs.

The inferinfo integer is set as follows:

If a shifted column is fixed to 0 and the corresponding bar does not necessarily has value 1 then we fix these entries to 0 and inferinfo is i * nblocks + j, where (i,j) is the leader of the bar. The SCI depends on whether i is in Gamma or not (see Lemma 1 in the paper and the comments above).
If a bar has value 1 and the shifted column has one entry that is not fixed, it can be fixed to 1 and inferinfo is (nspcons*nblocks) + i * nblocks + j, where (i,j) is the leader of the bar; see Proposition 1 (2c).

Parameters

scip	SCIP data structure
cons	constraint that inferred the bound change
infervar	variable that was deduced
inferinfo	inference information
boundtype	the type of the changed bound (lower or upper bound)
bdchgidx	bound change index (time stamp of bound change), or NULL for current time
result	pointer to store the result of the propagation conflict resolving call

Definition at line 1104 of file cons_orbitope.c.

References computeSCTable(), FALSE, MIN, NULL, SCIP_Bool, SCIP_CALL, SCIP_DIDNOTFIND, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIP_SUCCESS, SCIPaddConflictLb(), SCIPaddConflictUb(), SCIPconsGetData(), SCIPdebugMsg, SCIPgetVarLbAtIndex(), SCIPgetVarUbAtIndex(), SCIPsnprintf(), and separateConstraints().

Referenced by propagateCons(), and SCIP_DECL_CONSRESPROP().

◆ separateConstraints()

static SCIP_RETCODE separateConstraints	(	SCIP *	scip,
		SCIP_CONSHDLR *	conshdlr,
		SCIP_CONS **	conss,
		int	nconss,
		int	nusefulconss,
		SCIP_SOL *	sol,
		SCIP_RESULT *	result
	)

static

separate or enforce constraints

Parameters

scip	SCIP data structure
conshdlr	constraint handler
conss	constraints to process
nconss	number of constraints
nusefulconss	number of useful (non-obsolete) constraints to process
sol	solution to separate (NULL for the LP solution)
result	pointer to store the result (should be initialized)

Definition at line 1380 of file cons_orbitope.c.

References CONSHDLR_NAME, copyValues(), FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_DECL_CONSHDLRCOPY(), SCIP_OKAY, SCIP_REDUCEDDOM, SCIP_SEPARATED, SCIPconsGetData(), SCIPconshdlrGetName(), SCIPdebugMsg, and separateSCIs().

Referenced by resolvePropagation(), SCIP_DECL_CONSENFOLP(), SCIP_DECL_CONSENFORELAX(), SCIP_DECL_CONSSEPALP(), and SCIP_DECL_CONSSEPASOL().

◆ SCIP_DECL_CONSHDLRCOPY()

static SCIP_DECL_CONSHDLRCOPY ( conshdlrCopyOrbitope )

static

copy method for constraint handler plugins (called when SCIP copies plugins)

Definition at line 1455 of file cons_orbitope.c.

References CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_DECL_CONSDELETE(), SCIP_OKAY, SCIPconshdlrGetName(), SCIPincludeConshdlrOrbitope(), and TRUE.

Referenced by separateConstraints().

◆ SCIP_DECL_CONSDELETE()

static SCIP_DECL_CONSDELETE ( consDeleteOrbitope )

static

frees specific constraint data

Definition at line 1471 of file cons_orbitope.c.

References consdataFree(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_DECL_CONSTRANS(), SCIP_OKAY, and SCIPconshdlrGetName().

Referenced by SCIP_DECL_CONSHDLRCOPY().

◆ SCIP_DECL_CONSTRANS()

static SCIP_DECL_CONSTRANS ( consTransOrbitope )

static

transforms constraint data into data belonging to the transformed problem

Definition at line 1483 of file cons_orbitope.c.

References consdataCreate(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_DECL_CONSSEPALP(), SCIP_OKAY, SCIP_STAGE_TRANSFORMING, SCIPconsGetData(), SCIPconsGetName(), SCIPconshdlrGetName(), SCIPconsIsChecked(), SCIPconsIsDynamic(), SCIPconsIsEnforced(), SCIPconsIsInitial(), SCIPconsIsLocal(), SCIPconsIsModifiable(), SCIPconsIsPropagated(), SCIPconsIsRemovable(), SCIPconsIsSeparated(), SCIPconsIsStickingAtNode(), SCIPcreateCons(), and SCIPgetStage().

Referenced by SCIP_DECL_CONSDELETE().

◆ SCIP_DECL_CONSSEPALP()

static SCIP_DECL_CONSSEPALP ( consSepalpOrbitope )

static

separation method of constraint handler for LP solutions

Definition at line 1513 of file cons_orbitope.c.

References NULL, SCIP_CALL, SCIP_DECL_CONSSEPASOL(), SCIP_DIDNOTFIND, SCIP_DIDNOTRUN, SCIP_OKAY, SCIPconshdlrGetName(), SCIPdebugMsg, SCIPgetNLPBranchCands(), and separateConstraints().

Referenced by SCIP_DECL_CONSTRANS().

◆ SCIP_DECL_CONSSEPASOL()

static SCIP_DECL_CONSSEPASOL ( consSepasolOrbitope )

static

separation method of constraint handler for arbitrary primal solutions

Definition at line 1536 of file cons_orbitope.c.

References NULL, SCIP_CALL, SCIP_DECL_CONSENFOLP(), SCIP_DIDNOTFIND, SCIP_OKAY, SCIPconshdlrGetName(), SCIPdebugMsg, and separateConstraints().

Referenced by SCIP_DECL_CONSSEPALP().

◆ SCIP_DECL_CONSENFOLP()

static SCIP_DECL_CONSENFOLP ( consEnfolpOrbitope )

static

constraint enforcing method of constraint handler for LP solutions

Definition at line 1554 of file cons_orbitope.c.

References NULL, SCIP_CALL, SCIP_DECL_CONSENFORELAX(), SCIP_FEASIBLE, SCIP_OKAY, SCIPconshdlrGetName(), SCIPdebugMsg, SCIPgetNLPBranchCands(), and separateConstraints().

Referenced by SCIP_DECL_CONSSEPASOL().

◆ SCIP_DECL_CONSENFORELAX()

static SCIP_DECL_CONSENFORELAX ( consEnforelaxOrbitope )

static

constraint enforcing method of constraint handler for relaxation solutions

Definition at line 1575 of file cons_orbitope.c.

References NULL, SCIP_CALL, SCIP_DECL_CONSENFOPS(), SCIP_FEASIBLE, SCIP_OKAY, SCIPconshdlrGetName(), SCIPdebugMsg, and separateConstraints().

Referenced by SCIP_DECL_CONSENFOLP().

◆ SCIP_DECL_CONSENFOPS()

static SCIP_DECL_CONSENFOPS ( consEnfopsOrbitope )

static

constraint enforcing method of constraint handler for pseudo solutions

Definition at line 1593 of file cons_orbitope.c.

References computeSCTable(), CONSHDLR_NAME, copyValues(), FALSE, fixTriangle(), NULL, SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_DECL_CONSCHECK(), SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_OKAY, SCIP_Real, SCIP_REDUCEDDOM, SCIPconsGetData(), SCIPconsGetName(), SCIPconshdlrGetName(), SCIPdebugMsg, SCIPisGT(), and SCIPisIntegral().

Referenced by SCIP_DECL_CONSENFORELAX().

◆ SCIP_DECL_CONSCHECK()

static SCIP_DECL_CONSCHECK ( consCheckOrbitope )

static

feasibility check method of constraint handler for integral solutions

Definition at line 1699 of file cons_orbitope.c.

References computeSCTable(), CONSHDLR_NAME, copyValues(), NULL, SCIP_DECL_CONSPROP(), SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_OKAY, SCIP_Real, SCIPconsGetData(), SCIPconsGetName(), SCIPconshdlrGetName(), SCIPdebugMsg, SCIPinfoMessage(), SCIPisFeasIntegral(), SCIPisFeasZero(), SCIPisGT(), and SCIPvarGetName().

Referenced by SCIP_DECL_CONSENFOPS().

◆ SCIP_DECL_CONSPROP()

static SCIP_DECL_CONSPROP ( consPropOrbitope )

static

domain propagation method of constraint handler

Definition at line 1853 of file cons_orbitope.c.

References CONSHDLR_NAME, FALSE, NULL, propagateCons(), SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_DECL_CONSPRESOL(), SCIP_DIDNOTFIND, SCIP_DIDNOTRUN, SCIP_OKAY, SCIP_REDUCEDDOM, SCIPconsGetName(), SCIPconshdlrGetName(), and SCIPdebugMsg.

Referenced by SCIP_DECL_CONSCHECK().

◆ SCIP_DECL_CONSPRESOL()

static SCIP_DECL_CONSPRESOL ( consPresolOrbitope )

static

presolving method of constraint handler

Definition at line 1899 of file cons_orbitope.c.

References CONSHDLR_NAME, FALSE, NULL, propagateCons(), SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_DECL_CONSRESPROP(), SCIP_DIDNOTFIND, SCIP_DIDNOTRUN, SCIP_OKAY, SCIP_SUCCESS, SCIPconsGetName(), SCIPconshdlrGetName(), and SCIPdebugMsg.

Referenced by SCIP_DECL_CONSPROP().

◆ SCIP_DECL_CONSRESPROP()

static SCIP_DECL_CONSRESPROP ( consRespropOrbitope )

static

propagation conflict resolving method of constraint handler

Definition at line 1947 of file cons_orbitope.c.

References NULL, resolvePropagation(), SCIP_CALL, SCIP_DECL_CONSLOCK(), and SCIP_OKAY.

Referenced by SCIP_DECL_CONSPRESOL().

◆ SCIP_DECL_CONSLOCK()

static SCIP_DECL_CONSLOCK ( consLockOrbitope )

static

variable rounding lock method of constraint handler

Definition at line 1963 of file cons_orbitope.c.

References CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_DECL_CONSPRINT(), SCIP_OKAY, SCIPaddVarLocks(), SCIPconsGetData(), SCIPconshdlrGetName(), and SCIPdebugMsg.

Referenced by SCIP_DECL_CONSRESPROP().

◆ SCIP_DECL_CONSPRINT()

static SCIP_DECL_CONSPRINT ( consPrintOrbitope )

static

constraint display method of constraint handler

Definition at line 2002 of file cons_orbitope.c.

References CONSHDLR_NAME, NULL, SCIP_DECL_CONSCOPY(), SCIP_OKAY, SCIPconsGetData(), SCIPconshdlrGetName(), SCIPdebugMsg, SCIPinfoMessage(), and SCIPvarGetName().

Referenced by SCIP_DECL_CONSLOCK().

◆ SCIP_DECL_CONSCOPY()

static SCIP_DECL_CONSCOPY ( consCopyOrbitope )

static

constraint copying method of constraint handler

Definition at line 2052 of file cons_orbitope.c.

References CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_DECL_CONSPARSE(), SCIP_OKAY, SCIPallocBufferArray, SCIPconsGetData(), SCIPconsGetName(), SCIPconshdlrGetName(), SCIPcreateConsOrbitope(), SCIPdebugMsg, SCIPfreeBufferArray, SCIPgetVarCopy(), and TRUE.

Referenced by SCIP_DECL_CONSPRINT().

◆ SCIP_DECL_CONSPARSE()

static SCIP_DECL_CONSPARSE ( consParseOrbitope )

static

constraint parsing method of constraint handler

Definition at line 2122 of file cons_orbitope.c.

References FALSE, NULL, SCIP_Bool, SCIP_CALL, SCIP_DECL_CONSGETVARS(), SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_VERBLEVEL_MINIMAL, SCIPallocBufferArray, SCIPcalcMemGrowSize(), SCIPcreateConsOrbitope(), SCIPfindVar(), SCIPfreeBufferArray, SCIPreallocBufferArray, SCIPverbMessage(), and TRUE.

Referenced by SCIP_DECL_CONSCOPY().

◆ SCIP_DECL_CONSGETVARS()

static SCIP_DECL_CONSGETVARS ( consGetVarsOrbitope )

static

constraint method of constraint handler which returns the variables (if possible)

Definition at line 2248 of file cons_orbitope.c.

References FALSE, NULL, SCIP_DECL_CONSGETNVARS(), SCIP_OKAY, SCIPconsGetData(), and TRUE.

Referenced by SCIP_DECL_CONSPARSE().

◆ SCIP_DECL_CONSGETNVARS()

static SCIP_DECL_CONSGETNVARS ( consGetNVarsOrbitope )

static

constraint method of constraint handler which returns the number of variables (if possible)

Definition at line 2281 of file cons_orbitope.c.

References NULL, SCIP_OKAY, SCIPconsGetData(), SCIPincludeConshdlrOrbitope(), and TRUE.

Referenced by SCIP_DECL_CONSGETVARS().

SCIP

Detailed Description

Macros

Functions

Macro Definition Documentation

◆ CONSHDLR_NAME

◆ CONSHDLR_DESC

◆ CONSHDLR_SEPAPRIORITY

◆ CONSHDLR_ENFOPRIORITY

◆ CONSHDLR_CHECKPRIORITY

◆ CONSHDLR_SEPAFREQ

◆ CONSHDLR_PROPFREQ

◆ CONSHDLR_EAGERFREQ

◆ CONSHDLR_MAXPREROUNDS

◆ CONSHDLR_DELAYSEPA

◆ CONSHDLR_DELAYPROP

◆ CONSHDLR_NEEDSCONS

◆ CONSHDLR_PROP_TIMING

◆ CONSHDLR_PRESOLTIMING

Function Documentation

◆ consdataFree()

◆ consdataCreate()

◆ copyValues()

◆ computeSCTable()

◆ fixTriangle()

◆ separateSCIs()

◆ propagateCons()

◆ resolvePropagation()

◆ separateConstraints()

◆ SCIP_DECL_CONSHDLRCOPY()

◆ SCIP_DECL_CONSDELETE()

◆ SCIP_DECL_CONSTRANS()

◆ SCIP_DECL_CONSSEPALP()

◆ SCIP_DECL_CONSSEPASOL()

◆ SCIP_DECL_CONSENFOLP()

◆ SCIP_DECL_CONSENFORELAX()

◆ SCIP_DECL_CONSENFOPS()

◆ SCIP_DECL_CONSCHECK()

◆ SCIP_DECL_CONSPROP()

◆ SCIP_DECL_CONSPRESOL()

◆ SCIP_DECL_CONSRESPROP()

◆ SCIP_DECL_CONSLOCK()

◆ SCIP_DECL_CONSPRINT()

◆ SCIP_DECL_CONSCOPY()

◆ SCIP_DECL_CONSPARSE()

◆ SCIP_DECL_CONSGETVARS()

◆ SCIP_DECL_CONSGETNVARS()