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SCIP Doxygen Documentation: nodesel_estimate.c Source File

46#define NODESEL_NAME "estimate" 47#define NODESEL_DESC "best estimate search" 48#define NODESEL_STDPRIORITY 200000 49#define NODESEL_MEMSAVEPRIORITY 100 56#define DEFAULT_MINPLUNGEDEPTH -1 57#define DEFAULT_MAXPLUNGEDEPTH -1 58#define DEFAULT_MAXPLUNGEQUOT 0.25 60#define DEFAULT_BESTNODEFREQ 10 61#define DEFAULT_BREADTHFIRSTDEPTH -1 62#define DEFAULT_PLUNGEOFFSET 0 66struct

SCIP_NodeselData

76 int

breadthfirstdepth;

90

assert(nodesel !=

NULL

);

105

assert(nodesel !=

NULL

);

111

assert(nodeseldata !=

NULL

);

130

assert(nodesel !=

NULL

);

133

assert(selnode !=

NULL

);

139

assert(nodeseldata !=

NULL

);

165

bestnodefreq = (nodeseldata->bestnodefreq == 0 ? INT_MAX : nodeseldata->bestnodefreq);

172

nodeseldata->plungeoffset);

184

minplungedepth = nodeseldata->minplungedepth;

185

maxplungedepth = nodeseldata->maxplungedepth;

186

maxplungequot = nodeseldata->maxplungequot;

187 if

( minplungedepth == -1 )

191

minplungedepth += 10;

192 if

( maxplungedepth >= 0 )

193

minplungedepth =

MIN

(minplungedepth, maxplungedepth);

195 if

( maxplungedepth == -1 )

197

maxplungedepth =

MAX

(maxplungedepth, minplungedepth);

201 if

( plungedepth > maxplungedepth )

204 SCIPdebugMsg

(

scip

"plungedepth: [%d,%d], cur: %d -> abort plunging\n"

, minplungedepth, maxplungedepth, plungedepth);

227

cutoffbound = lowerbound + 0.2 * (cutoffbound - lowerbound);

230 if

( plungedepth < minplungedepth )

235

maxbound = lowerbound + maxplungequot * (cutoffbound - lowerbound);

238 SCIPdebugMsg

(

scip

"plungedepth: [%d,%d], cur: %d, bounds: [%g,%g], maxbound: %g\n"

239

minplungedepth, maxplungedepth, plungedepth, lowerbound, cutoffbound, maxbound);

300

assert(nodesel !=

NULL

);

341 if

( depth1 < depth2 )

343 else if

( depth1 > depth2 )

376

nodeselSelectEstimate, nodeselCompEstimate, nodeseldata) );

378

assert(nodesel !=

NULL

);

385 "nodeselection/estimate/minplungedepth"

386 "minimal plunging depth, before new best node may be selected (-1 for dynamic setting)"

389 "nodeselection/estimate/maxplungedepth"

390 "maximal plunging depth, before new best node is forced to be selected (-1 for dynamic setting)"

393 "nodeselection/estimate/maxplungequot"

394 "maximal quotient (estimate - lowerbound)/(cutoffbound - lowerbound) where plunging is performed"

397 "nodeselection/estimate/bestnodefreq"

398 "frequency at which the best node instead of the best estimate is selected (0: never)"

401 "nodeselection/estimate/breadthfirstdepth"

402 "depth until breadth-first search is applied"

405 "nodeselection/estimate/plungeoffset"

406 "number of nodes before doing plunging the first time"

#define SCIP_LONGINT_FORMAT

SCIP_RETCODE SCIPincludeNodeselEstimate(SCIP *scip)

SCIP_RETCODE SCIPaddIntParam(SCIP *scip, const char *name, const char *desc, int *valueptr, SCIP_Bool isadvanced, int defaultvalue, int minvalue, int maxvalue, SCIP_DECL_PARAMCHGD((*paramchgd)), SCIP_PARAMDATA *paramdata)

SCIP_RETCODE SCIPaddRealParam(SCIP *scip, const char *name, const char *desc, SCIP_Real *valueptr, SCIP_Bool isadvanced, SCIP_Real defaultvalue, SCIP_Real minvalue, SCIP_Real maxvalue, SCIP_DECL_PARAMCHGD((*paramchgd)), SCIP_PARAMDATA *paramdata)

#define SCIPfreeBlockMemory(scip, ptr)

#define SCIPallocBlockMemory(scip, ptr)

SCIP_NODETYPE SCIPnodeGetType(SCIP_NODE *node)

SCIP_Real SCIPnodeGetLowerbound(SCIP_NODE *node)

SCIP_Real SCIPnodeGetEstimate(SCIP_NODE *node)

int SCIPnodeGetDepth(SCIP_NODE *node)

SCIP_RETCODE SCIPincludeNodeselBasic(SCIP *scip, SCIP_NODESEL **nodesel, const char *name, const char *desc, int stdpriority, int memsavepriority, SCIP_DECL_NODESELSELECT((*nodeselselect)), SCIP_DECL_NODESELCOMP((*nodeselcomp)), SCIP_NODESELDATA *nodeseldata)

void SCIPnodeselSetData(SCIP_NODESEL *nodesel, SCIP_NODESELDATA *nodeseldata)

SCIP_RETCODE SCIPsetNodeselFree(SCIP *scip, SCIP_NODESEL *nodesel, SCIP_DECL_NODESELFREE((*nodeselfree)))

SCIP_NODESELDATA * SCIPnodeselGetData(SCIP_NODESEL *nodesel)

SCIP_RETCODE SCIPsetNodeselCopy(SCIP *scip, SCIP_NODESEL *nodesel, SCIP_DECL_NODESELCOPY((*nodeselcopy)))

const char * SCIPnodeselGetName(SCIP_NODESEL *nodesel)

SCIP_Longint SCIPgetNSolsFound(SCIP *scip)

int SCIPgetMaxDepth(SCIP *scip)

SCIP_Longint SCIPgetNNodes(SCIP *scip)

SCIP_Longint SCIPgetNStrongbranchLPIterations(SCIP *scip)

SCIP_Real SCIPgetLowerbound(SCIP *scip)

SCIP_Longint SCIPgetNNodeLPIterations(SCIP *scip)

SCIP_Real SCIPgetCutoffbound(SCIP *scip)

SCIP_Real SCIPinfinity(SCIP *scip)

SCIP_Bool SCIPisInfinity(SCIP *scip, SCIP_Real val)

SCIP_Bool SCIPisGT(SCIP *scip, SCIP_Real val1, SCIP_Real val2)

SCIP_Bool SCIPisEQ(SCIP *scip, SCIP_Real val1, SCIP_Real val2)

SCIP_Bool SCIPisLT(SCIP *scip, SCIP_Real val1, SCIP_Real val2)

SCIP_NODE * SCIPgetBestSibling(SCIP *scip)

SCIP_NODE * SCIPgetBestChild(SCIP *scip)

SCIP_NODE * SCIPgetPrioSibling(SCIP *scip)

int SCIPgetDepth(SCIP *scip)

SCIP_NODE * SCIPgetBestNode(SCIP *scip)

int SCIPgetPlungeDepth(SCIP *scip)

SCIP_NODE * SCIPgetBestboundNode(SCIP *scip)

SCIP_NODE * SCIPgetPrioChild(SCIP *scip)

static SCIP_DECL_NODESELFREE(nodeselFreeEstimate)

#define DEFAULT_MAXPLUNGEDEPTH

static SCIP_DECL_NODESELCOMP(nodeselCompEstimate)

#define NODESEL_MEMSAVEPRIORITY

#define NODESEL_STDPRIORITY

#define DEFAULT_BESTNODEFREQ

static SCIP_DECL_NODESELCOPY(nodeselCopyEstimate)

static SCIP_DECL_NODESELSELECT(nodeselSelectEstimate)

#define DEFAULT_PLUNGEOFFSET

#define DEFAULT_BREADTHFIRSTDEPTH

#define DEFAULT_MINPLUNGEDEPTH

#define DEFAULT_MAXPLUNGEQUOT

node selector for best estimate search

public methods for message output

public methods for node selectors

public methods for branch and bound tree

public methods for memory management

public methods for message handling

public methods for node selector plugins

public methods for numerical tolerances

public methods for SCIP parameter handling

public methods for querying solving statistics

public methods for the branch-and-bound tree

struct SCIP_NodeselData SCIP_NODESELDATA

enum SCIP_Retcode SCIP_RETCODE

enum SCIP_NodeType SCIP_NODETYPE

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