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SCIP Doxygen Documentation: nodesel_bfs.c Source File

47#define NODESEL_NAME "bfs" 48#define NODESEL_DESC "best first search" 49#define NODESEL_STDPRIORITY 100000 50#define NODESEL_MEMSAVEPRIORITY 0 57#define MINPLUNGEDEPTH -1 58#define MAXPLUNGEDEPTH -1 59#define MAXPLUNGEQUOT 0.25 64struct

SCIP_NodeselData

84

assert(nodesel !=

NULL

);

100

assert(nodesel !=

NULL

);

106

assert(nodeseldata !=

NULL

);

125

assert(nodesel !=

NULL

);

128

assert(selnode !=

NULL

);

134

assert(nodeseldata !=

NULL

);

137

minplungedepth = nodeseldata->minplungedepth;

138

maxplungedepth = nodeseldata->maxplungedepth;

139

maxplungequot = nodeseldata->maxplungequot;

140 if

( minplungedepth == -1 )

144

minplungedepth += 10;

145 if

( maxplungedepth >= 0 )

146

minplungedepth =

MIN

(minplungedepth, maxplungedepth);

148 if

( maxplungedepth == -1 )

150

maxplungedepth =

MAX

(maxplungedepth, minplungedepth);

154 if

( plungedepth >= maxplungedepth )

157 SCIPdebugMsg

(

scip

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

, minplungedepth, maxplungedepth, plungedepth);

168 if

( plungedepth < minplungedepth )

171 SCIPdebugMsg

(

scip

"plungedepth: [%d,%d], cur: %d => maxbound: infinity\n"

172

minplungedepth, maxplungedepth, plungedepth);

186

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

188

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

190 SCIPdebugMsg

(

scip

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

191

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

250

assert(nodesel !=

NULL

);

291 if

( depth1 < depth2 )

293 else if

( depth1 > depth2 )

326

nodeselSelectBfs, nodeselCompBfs, nodeseldata) );

328

assert(nodesel !=

NULL

);

335 "nodeselection/bfs/minplungedepth"

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

339 "nodeselection/bfs/maxplungedepth"

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

343 "nodeselection/bfs/maxplungequot"

344 "maximal quotient (curlowerbound - lowerbound)/(cutoffbound - lowerbound) where plunging is performed"

SCIP_RETCODE SCIPincludeNodeselBfs(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 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)

SCIP_NODE * SCIPgetBestNode(SCIP *scip)

int SCIPgetPlungeDepth(SCIP *scip)

SCIP_NODE * SCIPgetPrioChild(SCIP *scip)

static SCIP_DECL_NODESELFREE(nodeselFreeBfs)

static SCIP_DECL_NODESELSELECT(nodeselSelectBfs)

static SCIP_DECL_NODESELCOMP(nodeselCompBfs)

#define NODESEL_MEMSAVEPRIORITY

#define NODESEL_STDPRIORITY

static SCIP_DECL_NODESELCOPY(nodeselCopyBfs)

node selector for best first 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

type definitions for miscellaneous datastructures

struct SCIP_NodeselData SCIP_NODESELDATA

enum SCIP_Retcode SCIP_RETCODE

enum SCIP_NodeType SCIP_NODETYPE

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