Detailed Description

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

Author: Timo Berthold; Marc Pfetsch; Christopher Hojny

The type of constraints of this constraint handler is described in cons_orbitope_pp.h. When creating the constraint, users can decide whether it is a constraint defining the model or "just" use to handle symmetries. In the latter case, symmetry reductions are only performed by the constraint handler if strong dual reductions are permitted.

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

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

Definition in file cons_orbitope_pp.c.

#include "blockmemshell/memory.h"
#include "scip/cons_orbitope_pp.h"
#include "scip/cons_setppc.h"
#include "scip/pub_cons.h"
#include "scip/pub_message.h"
#include "scip/pub_var.h"
#include "scip/scip.h"
#include "scip/scip_branch.h"
#include "scip/scip_conflict.h"
#include "scip/scip_cons.h"
#include "scip/scip_copy.h"
#include "scip/scip_cut.h"
#include "scip/scip_general.h"
#include "scip/scip_lp.h"
#include "scip/scip_mem.h"
#include "scip/scip_message.h"
#include "scip/scip_numerics.h"
#include "scip/scip_param.h"
#include "scip/scip_prob.h"
#include "scip/scip_probing.h"
#include "scip/scip_sol.h"
#include "scip/scip_var.h"
#include "scip/symmetry.h"
#include <symmetry/type_symmetry.h>

Go to the source code of this file.

Macros
#define	CONSHDLR_NAME "orbitope_pp"
#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 -1
#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
#define	DEFAULT_FORCECONSCOPY FALSE

Functions
static SCIP_RETCODE	consdataFree (SCIP scip, SCIP_CONSDATA *consdata)
static SCIP_RETCODE	consdataCreate (SCIP scip, SCIP_CONSDATA consdata, SCIP_VAR **vars, int nrows, int ncols, SCIP_ORBITOPETYPE orbitopetype, SCIP_Bool resolveprop, SCIP_Bool ismodelcons)
static void	copyValues (SCIP scip, SCIP_CONSDATA consdata, SCIP_SOL *sol)
static void	computeSCTable (SCIP scip, int nrows, int ncols, 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, int inferinfo, SCIP_BDCHGIDX bdchgidx, SCIP_RESULT result)
static SCIP_RETCODE	enfopsPackingPartitioningOrbitopeSolution (SCIP scip, SCIP_CONS cons, SCIP_RESULT *result)
static SCIP_RETCODE	checkPackingPartitioningOrbitopeSolution (SCIP scip, SCIP_CONS cons, SCIP_SOL sol, SCIP_RESULT result, SCIP_Bool printreason)
static SCIP_RETCODE	separateConstraints (SCIP scip, SCIP_CONSHDLR conshdlr, SCIP_CONS *conss, int nconss, int nusefulconss, SCIP_SOL sol, SCIP_RESULT *result, SCIP_Bool enforce)
static SCIP_RETCODE	checkRedundantCons (SCIP scip, SCIP_CONS cons, SCIP_Bool *redundant)
static SCIP_RETCODE	replaceAggregatedVarsOrbitopePP (SCIP scip, SCIP_CONS cons)
static	SCIP_DECL_CONSHDLRCOPY (conshdlrCopyOrbitopePP)
static	SCIP_DECL_CONSFREE (consFreeOrbitopePP)
static	SCIP_DECL_CONSDELETE (consDeleteOrbitopePP)
static	SCIP_DECL_CONSTRANS (consTransOrbitopePP)
static	SCIP_DECL_CONSSEPALP (consSepalpOrbitopePP)
static	SCIP_DECL_CONSSEPASOL (consSepasolOrbitopePP)
static	SCIP_DECL_CONSENFOLP (consEnfolpOrbitopePP)
static	SCIP_DECL_CONSENFORELAX (consEnforelaxOrbitopePP)
static	SCIP_DECL_CONSENFOPS (consEnfopsOrbitopePP)
static	SCIP_DECL_CONSCHECK (consCheckOrbitopePP)
static	SCIP_DECL_CONSPROP (consPropOrbitopePP)
static	SCIP_DECL_CONSPRESOL (consPresolOrbitopePP)
static	SCIP_DECL_CONSRESPROP (consRespropOrbitopePP)
static	SCIP_DECL_CONSEXITPRE (consExitpreOrbitopePP)
static	SCIP_DECL_CONSLOCK (consLockOrbitopePP)
static	SCIP_DECL_CONSPRINT (consPrintOrbitopePP)
static	SCIP_DECL_CONSCOPY (consCopyOrbitopePP)
static	SCIP_DECL_CONSPARSE (consParseOrbitopePP)
static	SCIP_DECL_CONSGETVARS (consGetVarsOrbitopePP)
static	SCIP_DECL_CONSGETNVARS (consGetNVarsOrbitopePP)
SCIP_RETCODE	SCIPincludeConshdlrOrbitopePP (SCIP *scip)
SCIP_RETCODE	SCIPcreateConsOrbitopePP (SCIP scip, SCIP_CONS cons, const char name, SCIP_VAR ***vars, SCIP_ORBITOPETYPE orbitopetype, int nrows, int ncols, SCIP_Bool resolveprop, SCIP_Bool ismodelcons, 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	SCIPcreateConsBasicOrbitopePP (SCIP scip, SCIP_CONS cons, const char name, SCIP_VAR ***vars, SCIP_ORBITOPETYPE orbitopetype, int nrows, int ncols, SCIP_Bool resolveprop, SCIP_Bool ismodelcons)

Macro Definition Documentation

◆ CONSHDLR_NAME

#define CONSHDLR_NAME "orbitope_pp"

Definition at line 103 of file cons_orbitope_pp.c.

◆ CONSHDLR_DESC

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

Definition at line 104 of file cons_orbitope_pp.c.

◆ CONSHDLR_SEPAPRIORITY

#define CONSHDLR_SEPAPRIORITY +40100

priority of the constraint handler for separation

Definition at line 105 of file cons_orbitope_pp.c.

◆ CONSHDLR_ENFOPRIORITY

#define CONSHDLR_ENFOPRIORITY -1005200

priority of the constraint handler for constraint enforcing

Definition at line 106 of file cons_orbitope_pp.c.

◆ CONSHDLR_CHECKPRIORITY

#define CONSHDLR_CHECKPRIORITY -1005200

priority of the constraint handler for checking feasibility

Definition at line 107 of file cons_orbitope_pp.c.

◆ CONSHDLR_SEPAFREQ

#define CONSHDLR_SEPAFREQ -1

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

Definition at line 108 of file cons_orbitope_pp.c.

◆ CONSHDLR_PROPFREQ

#define CONSHDLR_PROPFREQ 1

frequency for propagating domains; zero means only preprocessing propagation

Definition at line 109 of file cons_orbitope_pp.c.

◆ 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 110 of file cons_orbitope_pp.c.

◆ CONSHDLR_MAXPREROUNDS

#define CONSHDLR_MAXPREROUNDS -1

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

Definition at line 112 of file cons_orbitope_pp.c.

◆ CONSHDLR_DELAYSEPA

#define CONSHDLR_DELAYSEPA FALSE

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

Definition at line 113 of file cons_orbitope_pp.c.

◆ CONSHDLR_DELAYPROP

#define CONSHDLR_DELAYPROP FALSE

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

Definition at line 114 of file cons_orbitope_pp.c.

◆ CONSHDLR_NEEDSCONS

#define CONSHDLR_NEEDSCONS TRUE

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

Definition at line 115 of file cons_orbitope_pp.c.

◆ CONSHDLR_PROP_TIMING

#define CONSHDLR_PROP_TIMING SCIP_PROPTIMING_BEFORELP

propagation timing mask of the constraint handler

Definition at line 117 of file cons_orbitope_pp.c.

◆ CONSHDLR_PRESOLTIMING

#define CONSHDLR_PRESOLTIMING SCIP_PRESOLTIMING_MEDIUM

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

Definition at line 118 of file cons_orbitope_pp.c.

◆ DEFAULT_FORCECONSCOPY

#define DEFAULT_FORCECONSCOPY FALSE

whether orbitope constraints should be forced to be copied to sub SCIPs

Definition at line 120 of file cons_orbitope_pp.c.

Function Documentation

◆ consdataFree()

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 156 of file cons_orbitope_pp.c.

References assert(), i, NULL, SCIP_CALL, SCIP_OKAY, SCIPfreeBlockMemory, SCIPfreeBlockMemoryArrayNull, and SCIPreleaseVar().

Referenced by SCIP_DECL_CONSDELETE().

◆ consdataCreate()

SCIP_RETCODE consdataCreate	(	SCIP *	scip,
		SCIP_CONSDATA **	consdata,
		SCIP_VAR ***	vars,
		int	nrows,
		int	ncols,
		SCIP_ORBITOPETYPE	orbitopetype,
		SCIP_Bool	resolveprop,
		SCIP_Bool	ismodelcons )

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
nrows	number of rows in orbitope matrix <=> p
ncols	number of columns in orbitope matrix <=> q
orbitopetype	type of orbitope constraint
resolveprop	should propagation be resolved?
ismodelcons	whether the orbitope is a model constraint

Definition at line 202 of file cons_orbitope_pp.c.

References assert(), FALSE, i, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPallocBlockMemory, SCIPallocBlockMemoryArray, SCIPcaptureVar(), SCIPduplicateBlockMemoryArray, SCIPgetTransformedVar(), SCIPisTransformed(), SCIPmarkDoNotMultaggrVar(), and vars.

Referenced by SCIP_DECL_CONSTRANS(), and SCIPcreateConsOrbitopePP().

◆ copyValues()

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 419 of file cons_orbitope_pp.c.

References assert(), i, NULL, SCIPgetSolVal(), and sol.

Referenced by checkPackingPartitioningOrbitopeSolution(), enfopsPackingPartitioningOrbitopeSolution(), and separateConstraints().

◆ computeSCTable()

void computeSCTable	(	SCIP *	scip,
		int	nrows,
		int	ncols,
		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
nrows	number of rows in orbitope matrix <=> p
ncols	number of columns in orbitope matrix <=> q
weights	SC weight table
cases	indicator of the SC cases
vals	current solution

Definition at line 455 of file cons_orbitope_pp.c.

References assert(), i, NULL, SCIP_Real, and SCIPisLT().

Referenced by checkPackingPartitioningOrbitopeSolution(), enfopsPackingPartitioningOrbitopeSolution(), resolvePropagation(), and separateSCIs().

◆ fixTriangle()

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 550 of file cons_orbitope_pp.c.

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

Referenced by enfopsPackingPartitioningOrbitopeSolution(), propagateCons(), and separateSCIs().

◆ separateSCIs()

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 634 of file cons_orbitope_pp.c.

References assert(), computeSCTable(), FALSE, fixTriangle(), i, NULL, nvars, SCIP_Bool, SCIP_CALL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIPaddRow(), SCIPaddVarsToRow(), SCIPcreateEmptyRowConshdlr(), SCIPinfinity(), SCIPisEfficacious(), SCIPisSumEQ(), SCIPreleaseRow(), SCIPsnprintf(), TRUE, and vars.

Referenced by separateConstraints().

◆ propagateCons()

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 797 of file cons_orbitope_pp.c.

References assert(), FALSE, fixTriangle(), i, NULL, SCIP_Bool, SCIP_CALL, SCIP_CONFTYPE_PROPAGATION, SCIP_OKAY, SCIP_ORBITOPETYPE_PACKING, SCIP_ORBITOPETYPE_PARTITIONING, SCIP_STAGE_SOLVING, SCIPaddConflictBinvar(), SCIPallocBufferArray, SCIPallowStrongDualReds(), SCIPanalyzeConflictCons(), SCIPconsGetData(), SCIPdebugMsg, SCIPfreeBufferArray, SCIPgetStage(), SCIPinferBinvarCons(), SCIPinitConflictAnalysis(), SCIPinProbing(), SCIPisConflictAnalysisApplicable(), SCIPvarGetLbLocal(), SCIPvarGetUbLocal(), TRUE, and vars.

Referenced by SCIP_DECL_CONSPRESOL(), and SCIP_DECL_CONSPROP().

◆ resolvePropagation()

SCIP_RETCODE resolvePropagation	(	SCIP *	scip,
		SCIP_CONS *	cons,
		int	inferinfo,
		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 * ncols + 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 (nrows*ncols) + i * ncols + 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
inferinfo	inference information
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 1173 of file cons_orbitope_pp.c.

References assert(), computeSCTable(), FALSE, i, MIN, NULL, result, SCIP_CALL, SCIP_DIDNOTFIND, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_ORBITOPETYPE_PARTITIONING, SCIP_Real, SCIP_SUCCESS, SCIPaddConflictLb(), SCIPaddConflictUb(), SCIPconsGetData(), SCIPdebugMsg, SCIPgetVarLbAtIndex(), SCIPgetVarUbAtIndex(), SCIPsnprintf(), and vars.

Referenced by SCIP_DECL_CONSRESPROP().

◆ enfopsPackingPartitioningOrbitopeSolution()

SCIP_RETCODE enfopsPackingPartitioningOrbitopeSolution	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_RESULT *	result )

static

check packing/partitioning orbitope solution for feasibility

Parameters

scip	SCIP data structure
cons	pointer to orbitope constraint
result	pointer to store the result of the enforcing call

Definition at line 1448 of file cons_orbitope_pp.c.

References assert(), computeSCTable(), copyValues(), FALSE, fixTriangle(), i, NULL, result, SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_INFEASIBLE, SCIP_OKAY, SCIP_Real, SCIP_REDUCEDDOM, SCIPallowStrongDualReds(), SCIPconsGetData(), SCIPconsGetName(), SCIPdebugMsg, SCIPisGT(), and SCIPisIntegral().

Referenced by SCIP_DECL_CONSENFOPS().

◆ checkPackingPartitioningOrbitopeSolution()

SCIP_RETCODE checkPackingPartitioningOrbitopeSolution	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_SOL *	sol,
		SCIP_RESULT *	result,
		SCIP_Bool	printreason )

static

check packing/partitioning orbitope solution for feasibility

Parameters

scip	SCIP data structure
cons	pointer to orbitope constraint
sol	solution to be checked
result	pointer to store the result of the enforcing call
printreason	whether reason for infeasibility should be printed

Definition at line 1545 of file cons_orbitope_pp.c.

References assert(), computeSCTable(), copyValues(), i, NULL, result, SCIP_Bool, SCIP_INFEASIBLE, SCIP_OKAY, SCIP_Real, SCIPconsGetData(), SCIPconsGetName(), SCIPdebugMsg, SCIPinfoMessage(), SCIPisFeasIntegral(), SCIPisFeasZero(), SCIPisGT(), SCIPvarGetName(), sol, and vars.

Referenced by SCIP_DECL_CONSCHECK().

◆ separateConstraints()

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

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)
enforce	whether we enforce orbitope constraints

Definition at line 1694 of file cons_orbitope_pp.c.

References assert(), c, CONSHDLR_NAME, copyValues(), FALSE, NULL, result, SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_OKAY, SCIP_REDUCEDDOM, SCIP_SEPARATED, SCIPallowStrongDualReds(), SCIPconsGetData(), SCIPconshdlrGetName(), SCIPdebugMsg, separateSCIs(), and sol.

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

◆ checkRedundantCons()

SCIP_RETCODE checkRedundantCons	(	SCIP *	scip,
		SCIP_CONS *	cons,
		SCIP_Bool *	redundant )

static

check whether all variables in an orbitope constraint are fixed

Parameters

scip	SCIP data structure
cons	constraint to be processed
redundant	pointer to store whether constraint is redundant (contains no active vars)

Definition at line 1775 of file cons_orbitope_pp.c.

References assert(), FALSE, i, NULL, SCIP_Bool, SCIP_OKAY, SCIPconsGetData(), SCIPvarIsActive(), TRUE, and vars.

Referenced by SCIP_DECL_CONSPRESOL().

◆ replaceAggregatedVarsOrbitopePP()

SCIP_RETCODE replaceAggregatedVarsOrbitopePP	(	SCIP *	scip,
		SCIP_CONS *	cons )

static

replace aggregated variables by active variables

Parameters

scip	SCIP data structure
cons	constraint to be processed

Definition at line 1820 of file cons_orbitope_pp.c.

References assert(), i, NULL, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIP_UNUSED, SCIP_VARSTATUS_FIXED, SCIP_VARSTATUS_MULTAGGR, SCIP_VARSTATUS_NEGATED, SCIPcaptureVar(), SCIPconsGetData(), SCIPgetBinvarRepresentative(), SCIPreleaseVar(), SCIPvarGetStatus(), SCIPvarIsActive(), var, and vars.

Referenced by SCIP_DECL_CONSEXITPRE().

◆ SCIP_DECL_CONSHDLRCOPY()

SCIP_DECL_CONSHDLRCOPY ( conshdlrCopyOrbitopePP )

static

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

Definition at line 1877 of file cons_orbitope_pp.c.

References assert(), CONSHDLR_NAME, NULL, SCIP_CALL, SCIP_OKAY, SCIPconshdlrGetName(), SCIPincludeConshdlrOrbitopePP(), TRUE, and valid.

◆ SCIP_DECL_CONSFREE()

SCIP_DECL_CONSFREE ( consFreeOrbitopePP )

static

frees constraint handler

Definition at line 1894 of file cons_orbitope_pp.c.

References assert(), CONSHDLR_NAME, NULL, SCIP_OKAY, SCIPconshdlrGetData(), SCIPconshdlrGetName(), and SCIPfreeBlockMemory.

◆ SCIP_DECL_CONSDELETE()

SCIP_DECL_CONSDELETE ( consDeleteOrbitopePP )

static

frees specific constraint data

Definition at line 1912 of file cons_orbitope_pp.c.

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

◆ SCIP_DECL_CONSTRANS()

SCIP_DECL_CONSTRANS ( consTransOrbitopePP )

static

transforms constraint data into data belonging to the transformed problem

Definition at line 1924 of file cons_orbitope_pp.c.

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

◆ SCIP_DECL_CONSSEPALP()

SCIP_DECL_CONSSEPALP ( consSepalpOrbitopePP )

static

separation method of constraint handler for LP solutions

Definition at line 1954 of file cons_orbitope_pp.c.

References assert(), FALSE, NULL, result, SCIP_CALL, SCIP_DIDNOTFIND, SCIP_DIDNOTRUN, SCIP_OKAY, SCIPconshdlrGetName(), SCIPdebugMsg, SCIPgetNLPBranchCands(), and separateConstraints().

◆ SCIP_DECL_CONSSEPASOL()

SCIP_DECL_CONSSEPASOL ( consSepasolOrbitopePP )

static

separation method of constraint handler for arbitrary primal solutions

Definition at line 1978 of file cons_orbitope_pp.c.

References assert(), FALSE, NULL, result, SCIP_CALL, SCIP_DIDNOTFIND, SCIP_OKAY, SCIPconshdlrGetName(), SCIPdebugMsg, separateConstraints(), and sol.

◆ SCIP_DECL_CONSENFOLP()

SCIP_DECL_CONSENFOLP ( consEnfolpOrbitopePP )

static

constraint enforcing method of constraint handler for LP solutions

Definition at line 1997 of file cons_orbitope_pp.c.

References assert(), NULL, result, SCIP_CALL, SCIP_FEASIBLE, SCIP_OKAY, SCIPconshdlrGetName(), SCIPdebugMsg, SCIPgetNLPBranchCands(), separateConstraints(), and TRUE.

◆ SCIP_DECL_CONSENFORELAX()

SCIP_DECL_CONSENFORELAX ( consEnforelaxOrbitopePP )

static

constraint enforcing method of constraint handler for relaxation solutions

Definition at line 2019 of file cons_orbitope_pp.c.

References assert(), NULL, result, SCIP_CALL, SCIP_FEASIBLE, SCIP_OKAY, SCIPconshdlrGetName(), SCIPdebugMsg, separateConstraints(), sol, and TRUE.

◆ SCIP_DECL_CONSENFOPS()

SCIP_DECL_CONSENFOPS ( consEnfopsOrbitopePP )

static

constraint enforcing method of constraint handler for pseudo solutions

Definition at line 2039 of file cons_orbitope_pp.c.

References assert(), c, CONSHDLR_NAME, enfopsPackingPartitioningOrbitopeSolution(), NULL, result, SCIP_CALL, SCIP_FEASIBLE, SCIP_INFEASIBLE, SCIP_OKAY, SCIPconsGetData(), and SCIPconshdlrGetName().

◆ SCIP_DECL_CONSCHECK()

SCIP_DECL_CONSCHECK ( consCheckOrbitopePP )

static

feasibility check method of constraint handler for integral solutions

Definition at line 2081 of file cons_orbitope_pp.c.

References assert(), c, checkPackingPartitioningOrbitopeSolution(), CONSHDLR_NAME, NULL, result, SCIP_CALL, SCIP_FEASIBLE, SCIP_OKAY, SCIPconsGetData(), SCIPconshdlrGetName(), SCIPdebugMsg, and sol.

◆ SCIP_DECL_CONSPROP()

SCIP_DECL_CONSPROP ( consPropOrbitopePP )

static

domain propagation method of constraint handler

Definition at line 2123 of file cons_orbitope_pp.c.

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

◆ SCIP_DECL_CONSPRESOL()

SCIP_DECL_CONSPRESOL ( consPresolOrbitopePP )

static

presolving method of constraint handler

Definition at line 2173 of file cons_orbitope_pp.c.

References assert(), c, checkRedundantCons(), CONSHDLR_NAME, FALSE, NULL, propagateCons(), result, SCIP_Bool, SCIP_CALL, SCIP_CUTOFF, SCIP_DIDNOTFIND, SCIP_DIDNOTRUN, SCIP_OKAY, SCIP_SUCCESS, SCIPconsGetName(), SCIPconshdlrGetName(), SCIPconsIsActive(), SCIPdebugMsg, and SCIPdelCons().

◆ SCIP_DECL_CONSRESPROP()

SCIP_DECL_CONSRESPROP ( consRespropOrbitopePP )

static

propagation conflict resolving method of constraint handler

Definition at line 2243 of file cons_orbitope_pp.c.

References assert(), NULL, resolvePropagation(), result, SCIP_CALL, and SCIP_OKAY.

◆ SCIP_DECL_CONSEXITPRE()

SCIP_DECL_CONSEXITPRE ( consExitpreOrbitopePP )

static

presolving deinitialization method of constraint handler (called after presolving has been finished)

Definition at line 2259 of file cons_orbitope_pp.c.

References assert(), c, CONSHDLR_NAME, NULL, replaceAggregatedVarsOrbitopePP(), SCIP_CALL, SCIP_OKAY, and SCIPconshdlrGetName().

◆ SCIP_DECL_CONSLOCK()

SCIP_DECL_CONSLOCK ( consLockOrbitopePP )

static

variable rounding lock method of constraint handler

Definition at line 2278 of file cons_orbitope_pp.c.

References assert(), CONSHDLR_NAME, i, NULL, SCIP_CALL, SCIP_LOCKTYPE_MODEL, SCIP_OKAY, SCIPaddVarLocksType(), SCIPconsGetData(), SCIPconshdlrGetName(), SCIPdebugMsg, and vars.

◆ SCIP_DECL_CONSPRINT()

SCIP_DECL_CONSPRINT ( consPrintOrbitopePP )

static

constraint display method of constraint handler

Definition at line 2318 of file cons_orbitope_pp.c.

References assert(), CONSHDLR_NAME, i, NULL, SCIP_CALL, SCIP_OKAY, SCIP_ORBITOPETYPE_PACKING, SCIP_ORBITOPETYPE_PARTITIONING, SCIPABORT, SCIPconsGetData(), SCIPconshdlrGetName(), SCIPdebugMsg, SCIPinfoMessage(), SCIPwriteVarName(), TRUE, and vars.

◆ SCIP_DECL_CONSCOPY()

SCIP_DECL_CONSCOPY ( consCopyOrbitopePP )

static

constraint copying method of constraint handler

Definition at line 2377 of file cons_orbitope_pp.c.

References assert(), CONSHDLR_NAME, FALSE, i, NULL, propagate, SCIP_CALL, SCIP_OKAY, SCIPallocBufferArray, SCIPconsGetData(), SCIPconsGetName(), SCIPconshdlrGetData(), SCIPconshdlrGetName(), SCIPcreateConsOrbitopePP(), SCIPdebugMsg, SCIPfreeBufferArray, SCIPgetVarCopy(), separate(), TRUE, valid, and vars.

◆ SCIP_DECL_CONSPARSE()

SCIP_DECL_CONSPARSE ( consParseOrbitopePP )

static

constraint parsing method of constraint handler

Definition at line 2460 of file cons_orbitope_pp.c.

References assert(), FALSE, NULL, propagate, SCIP_CALL, SCIP_OKAY, SCIP_ORBITOPETYPE_PACKING, SCIP_ORBITOPETYPE_PARTITIONING, SCIPallocBufferArray, SCIPcalcMemGrowSize(), SCIPcreateConsOrbitopePP(), SCIPerrorMessage, SCIPfreeBufferArray, SCIPparseVarName(), SCIPreallocBufferArray, SCIPskipSpace(), separate(), TRUE, var, and vars.

◆ SCIP_DECL_CONSGETVARS()

SCIP_DECL_CONSGETVARS ( consGetVarsOrbitopePP )

static

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

Definition at line 2594 of file cons_orbitope_pp.c.

References assert(), FALSE, i, NULL, SCIP_OKAY, SCIPconsGetData(), TRUE, and vars.

◆ SCIP_DECL_CONSGETNVARS()

SCIP_DECL_CONSGETNVARS ( consGetNVarsOrbitopePP )

static

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

Definition at line 2627 of file cons_orbitope_pp.c.

References assert(), NULL, nvars, SCIP_OKAY, SCIPconsGetData(), and TRUE.

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

◆ DEFAULT_FORCECONSCOPY

Function Documentation

◆ consdataFree()

◆ consdataCreate()

◆ copyValues()

◆ computeSCTable()

◆ fixTriangle()

◆ separateSCIs()

◆ propagateCons()

◆ resolvePropagation()

◆ enfopsPackingPartitioningOrbitopeSolution()

◆ checkPackingPartitioningOrbitopeSolution()

◆ separateConstraints()

◆ checkRedundantCons()

◆ replaceAggregatedVarsOrbitopePP()

◆ SCIP_DECL_CONSHDLRCOPY()

◆ SCIP_DECL_CONSFREE()

◆ 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_CONSEXITPRE()

◆ SCIP_DECL_CONSLOCK()

◆ SCIP_DECL_CONSPRINT()

◆ SCIP_DECL_CONSCOPY()

◆ SCIP_DECL_CONSPARSE()

◆ SCIP_DECL_CONSGETVARS()

◆ SCIP_DECL_CONSGETNVARS()