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Remove randomness by default of BBox strategies #1066

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Oct 21, 2023
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Remove randomness by default of BBox strategies #1066

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11 changes: 10 additions & 1 deletion parsers/src/main/java/org/chocosolver/parser/RegParser.java
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Original file line number Diff line number Diff line change
Expand Up @@ -92,6 +92,12 @@ public abstract class RegParser implements IParser {
usage = "Define the variable heuristic to use.")
public SearchParams.VariableSelection varH = SearchParams.VariableSelection.DOMWDEG_CACD;

@SuppressWarnings("FieldMayBeFinal")
@Option(name = "-tie",
forbids = {"-varsel"},
usage = "Define the variable tie breaker to use with black-box strategies.")
private SearchParams.VariableTieBreaker tie = SearchParams.VariableTieBreaker.SMALLEST_DOMAIN;

@Option(name = "-flush",
forbids = {"-varsel"},
usage = "Autoflush weights on black-box strategies (default: 32).")
Expand Down Expand Up @@ -173,6 +179,9 @@ public abstract class RegParser implements IParser {
@Option(name = "-dfx", usage = "Force default explanation algorithm.")
public boolean dftexp = false;

@Option(name = "-gpa", usage = "Use the Generating Partial Assignment procedure (default: false).")
public boolean gpa = false;

/**
* Default settings to apply
*/
Expand Down Expand Up @@ -254,7 +263,7 @@ public final boolean setUp(String... args) throws SetUpException {
System.out.printf("%s\n", Arrays.toString(args));
}
if(varsel == null){
varsel = new SearchParams.VarSelConf(varH, flushRate);
varsel = new SearchParams.VarSelConf(varH, tie, flushRate);
}
if(valsel == null){
valsel = new SearchParams.ValSelConf(valH, best, bestRate, last);
Expand Down
53 changes: 34 additions & 19 deletions parsers/src/main/java/org/chocosolver/parser/flatzinc/Flatzinc.java
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Expand Up @@ -209,25 +209,40 @@ public void parse(Model target, Datas data, InputStream is) {
@Override
public void freesearch(Solver solver) {
BlackBoxConfigurator bb = BlackBoxConfigurator.init();
boolean opt = solver.getObjectiveManager().isOptimization();
// variable selection
SearchParams.ValSelConf defaultValSel = new SearchParams.ValSelConf(
SearchParams.ValueSelection.MIN, opt, 1, opt);
SearchParams.VarSelConf defaultVarSel = new SearchParams.VarSelConf(
SearchParams.VariableSelection.DOMWDEG, Integer.MAX_VALUE);
bb.setIntVarStrategy((vars) -> defaultVarSel.make().apply(vars, defaultValSel.make().apply(vars[0].getModel())));
// restart policy
SearchParams.ResConf defaultResConf = new SearchParams.ResConf(
SearchParams.Restart.LUBY, 500, 50_000, true);
bb.setRestartPolicy(defaultResConf.make());
// other parameters
bb.setNogoodOnRestart(true)
.setRestartOnSolution(true)
.setExcludeObjective(true)
.setExcludeViews(false)
.setMetaStrategy(m -> Search.lastConflict(m, 1));
if (level.isLoggable(Level.INFO)) {
solver.log().println(bb.toString());
if (solver.getObjectiveManager().isOptimization()) {
// For COP
SearchParams.ValSelConf defaultValSel = new SearchParams.ValSelConf(
SearchParams.ValueSelection.MIN, true, 16, true);
SearchParams.VarSelConf defaultVarSel = new SearchParams.VarSelConf(
SearchParams.VariableSelection.DOMWDEG_CACD, SearchParams.VariableTieBreaker.SMALLEST_DOMAIN, 32);
bb.setIntVarStrategy((vars) -> defaultVarSel.make().apply(vars, defaultValSel.make().apply(vars[0].getModel())));
// restart policy
SearchParams.ResConf defaultResConf = new SearchParams.ResConf(
SearchParams.Restart.GEOMETRIC, 5, 1.05, 50_000, true);
bb.setRestartPolicy(defaultResConf.make());
// complementary settings
bb.setNogoodOnRestart(true)
.setRestartOnSolution(true)
.setExcludeObjective(true)
.setExcludeViews(false)
.setMetaStrategy(m -> Search.lastConflict(m, 4));
}else{
// For CSP
SearchParams.ValSelConf defaultValSel = new SearchParams.ValSelConf(
SearchParams.ValueSelection.MIN, false, 16, false);
SearchParams.VarSelConf defaultVarSel = new SearchParams.VarSelConf(
SearchParams.VariableSelection.DOMWDEG, SearchParams.VariableTieBreaker.SMALLEST_DOMAIN, 32);
bb.setIntVarStrategy((vars) -> defaultVarSel.make().apply(vars, defaultValSel.make().apply(vars[0].getModel())));
// restart policy
SearchParams.ResConf defaultResConf = new SearchParams.ResConf(
SearchParams.Restart.GEOMETRIC, 5, 1.05, 50_000, true);
bb.setRestartPolicy(defaultResConf.make());
// complementary settings
bb.setNogoodOnRestart(false)
.setRestartOnSolution(false)
.setExcludeObjective(true)
.setExcludeViews(false)
.setMetaStrategy(m -> Search.lastConflict(m, 1));
}
bb.make(solver.getModel());
}
Expand Down
2 changes: 1 addition & 1 deletion parsers/src/main/java/org/chocosolver/parser/flatzinc/ast/searches/IntSearch.java
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Expand Up @@ -61,7 +61,7 @@ private static VariableSelector<IntVar> variableSelector(IntVar[] variables, Var
case max_regret:
return new MaxRegret();
case dom_w_deg:
return new DomOverWDeg<>(variables, variables[0].getModel().getSeed());
return new DomOverWDeg<>(variables);
default:
System.err.println("% No implementation for " + varChoice.name() + ". Set default.");
return null;
Expand Down
1 change: 1 addition & 0 deletions parsers/src/main/java/org/chocosolver/parser/handlers/VarSelHandler.java
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Expand Up @@ -48,6 +48,7 @@ protected SearchParams.VarSelConf parse(String argument) throws NumberFormatExce
if (pars.length == 3) {
return new SearchParams.VarSelConf(
SearchParams.VariableSelection.valueOf(pars[0].toUpperCase()),
SearchParams.VariableTieBreaker.valueOf(pars[1].toUpperCase()),
Integer.parseInt(pars[2])
);
}
Expand Down
53 changes: 36 additions & 17 deletions parsers/src/main/java/org/chocosolver/parser/xcsp/XCSP.java
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Expand Up @@ -142,23 +142,42 @@ public void parse(Model target, XCSPParser parser) throws Exception {
@Override
public void freesearch(Solver solver) {
BlackBoxConfigurator bb = BlackBoxConfigurator.init();
boolean opt = solver.getObjectiveManager().isOptimization();
// variable selection
SearchParams.ValSelConf defaultValSel = new SearchParams.ValSelConf(
SearchParams.ValueSelection.MIN, opt, 1, opt);
SearchParams.VarSelConf defaultVarSel = new SearchParams.VarSelConf(
SearchParams.VariableSelection.DOMWDEG, Integer.MAX_VALUE);
bb.setIntVarStrategy((vars) -> defaultVarSel.make().apply(vars, defaultValSel.make().apply(vars[0].getModel())));
// restart policy
SearchParams.ResConf defaultResConf = new SearchParams.ResConf(
SearchParams.Restart.LUBY, 500, 50_000, true);
bb.setRestartPolicy(defaultResConf.make());
// other parameters
bb.setNogoodOnRestart(true)
.setRestartOnSolution(true)
.setExcludeObjective(true)
.setExcludeViews(false)
.setMetaStrategy(m -> Search.lastConflict(m, 1));
if (solver.getObjectiveManager().isOptimization()) {
// For COP
SearchParams.ValSelConf defaultValSel = new SearchParams.ValSelConf(
SearchParams.ValueSelection.MIN, true, 16, true);
SearchParams.VarSelConf defaultVarSel = new SearchParams.VarSelConf(
SearchParams.VariableSelection.DOMWDEG, SearchParams.VariableTieBreaker.SMALLEST_DOMAIN, 32);
bb.setIntVarStrategy((vars) -> defaultVarSel.make().apply(vars, defaultValSel.make().apply(vars[0].getModel())));
// restart policy
SearchParams.ResConf defaultResConf = new SearchParams.ResConf(
SearchParams.Restart.GEOMETRIC, 10, 1.05, 50_000, true);
bb.setRestartPolicy(defaultResConf.make());
// complementary settings
bb.setNogoodOnRestart(true)
.setRestartOnSolution(true)
.setExcludeObjective(true)
.setExcludeViews(false)
.setMetaStrategy(m -> Search.lastConflict(m, 1))
.setRefinedPartialAssignmentGeneration(gpa);
} else {
// For CSP
SearchParams.ValSelConf defaultValSel = new SearchParams.ValSelConf(
SearchParams.ValueSelection.MIN, false, 16, true);
SearchParams.VarSelConf defaultVarSel = new SearchParams.VarSelConf(
SearchParams.VariableSelection.DOMWDEG_CACD, SearchParams.VariableTieBreaker.LARGEST_DOMAIN, 32);
bb.setIntVarStrategy((vars) -> defaultVarSel.make().apply(vars, defaultValSel.make().apply(vars[0].getModel())));
// restart policy
SearchParams.ResConf defaultResConf = new SearchParams.ResConf(
SearchParams.Restart.GEOMETRIC, 5, 1.05, 50_000, true);
bb.setRestartPolicy(defaultResConf.make());
// complementary settings
bb.setNogoodOnRestart(true)
.setRestartOnSolution(false)
.setExcludeObjective(true)
.setExcludeViews(false)
.setMetaStrategy(m -> Search.lastConflict(m, 4));
}
if (level.isLoggable(Level.INFO)) {
solver.log().println(bb.toString());
}
Expand Down
2 changes: 1 addition & 1 deletion parsers/src/test/java/org/chocosolver/parser/RegParserTest.java
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Expand Up @@ -156,7 +156,7 @@ public void testVarsel1() throws CmdLineException {
Assert.assertNull(parser.varsel);
p.parseArgument("-f", "-varsel", "[CHS,LARGEST_DOMAIN,64]", "/file");
Assert.assertEquals(parser.varsel, new SearchParams.VarSelConf(
SearchParams.VariableSelection.CHS, 64));
SearchParams.VariableSelection.CHS, SearchParams.VariableTieBreaker.LARGEST_DOMAIN, 64));
}

@Test(groups = "1s")
Expand Down
18 changes: 9 additions & 9 deletions solver/src/main/java/org/chocosolver/solver/ParallelPortfolio.java
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Expand Up @@ -437,7 +437,7 @@ private void configureModel(int workerID) {
SearchParams.ValueSelection.MIN, opt, 16, true);
intValSel = intValConf.make();
intVarConf = new SearchParams.VarSelConf(
SearchParams.VariableSelection.DOMWDEG, 32);
SearchParams.VariableSelection.DOMWDEG, SearchParams.VariableTieBreaker.SMALLEST_DOMAIN, 32);
intVarSel = intVarConf.make();
bb.setIntVarStrategy((vars) -> intVarSel.apply(vars, intValSel.apply(worker)));
bb.setMetaStrategy(m -> Search.lastConflict(m, 2));
Expand All @@ -451,7 +451,7 @@ private void configureModel(int workerID) {
SearchParams.ValueSelection.MIN, opt, 16, true);
intValSel = intValConf.make();
intVarConf = new SearchParams.VarSelConf(
SearchParams.VariableSelection.CHS, 32);
SearchParams.VariableSelection.CHS, SearchParams.VariableTieBreaker.SMALLEST_DOMAIN, 32);
intVarSel = intVarConf.make();
bb.setIntVarStrategy((vars) -> intVarSel.apply(vars, intValSel.apply(worker)));
bb.setMetaStrategy(m -> Search.lastConflict(m, 2));
Expand All @@ -465,7 +465,7 @@ private void configureModel(int workerID) {
SearchParams.ValueSelection.MIN, opt, 16, true);
intValSel = intValConf.make();
intVarConf = new SearchParams.VarSelConf(
SearchParams.VariableSelection.DOMWDEG_CACD, 32);
SearchParams.VariableSelection.DOMWDEG_CACD, SearchParams.VariableTieBreaker.SMALLEST_DOMAIN, 32);
intVarSel = intVarConf.make();
bb.setIntVarStrategy((vars) -> intVarSel.apply(vars, intValSel.apply(worker)));
bb.setMetaStrategy(m -> Search.lastConflict(m, 2));
Expand All @@ -479,7 +479,7 @@ private void configureModel(int workerID) {
SearchParams.ValueSelection.MIN, opt, 16, true);
intValSel = intValConf.make();
intVarConf = new SearchParams.VarSelConf(
SearchParams.VariableSelection.FRBA, 32);
SearchParams.VariableSelection.FRBA, SearchParams.VariableTieBreaker.SMALLEST_DOMAIN, 32);
intVarSel = intVarConf.make();
bb.setIntVarStrategy((vars) -> intVarSel.apply(vars, intValSel.apply(worker)));
bb.setMetaStrategy(m -> Search.lastConflict(m, 2));
Expand All @@ -493,7 +493,7 @@ private void configureModel(int workerID) {
SearchParams.ValueSelection.MIN, opt, 16, true);
intValSel = intValConf.make();
intVarConf = new SearchParams.VarSelConf(
SearchParams.VariableSelection.ACTIVITY, 32);
SearchParams.VariableSelection.ACTIVITY, SearchParams.VariableTieBreaker.LARGEST_DOMAIN, 32);
intVarSel = intVarConf.make();
bb.setIntVarStrategy((vars) -> intVarSel.apply(vars, intValSel.apply(worker)));
bb.setMetaStrategy(m -> Search.lastConflict(m, 2));
Expand All @@ -504,7 +504,7 @@ private void configureModel(int workerID) {
SearchParams.ValueSelection.MIN, opt, 16, true);
intValSel = intValConf.make();
intVarConf = new SearchParams.VarSelConf(
SearchParams.VariableSelection.DOMWDEG_CACD, 32);
SearchParams.VariableSelection.DOMWDEG_CACD, SearchParams.VariableTieBreaker.LARGEST_DOMAIN, 32);
intVarSel = intVarConf.make();
bb.setIntVarStrategy((vars) -> intVarSel.apply(vars, intValSel.apply(worker)));
bb.setMetaStrategy(m -> Search.lastConflict(m, 2));
Expand All @@ -515,7 +515,7 @@ private void configureModel(int workerID) {
SearchParams.ValueSelection.MIN, opt, 16, true);
intValSel = intValConf.make();
intVarConf = new SearchParams.VarSelConf(
SearchParams.VariableSelection.DOMWDEG, 32);
SearchParams.VariableSelection.DOMWDEG, SearchParams.VariableTieBreaker.LARGEST_DOMAIN, 32);
intVarSel = intVarConf.make();
bb.setIntVarStrategy((vars) -> intVarSel.apply(vars, intValSel.apply(worker)));
bb.setMetaStrategy(m -> Search.lastConflict(m, 2));
Expand All @@ -529,7 +529,7 @@ private void configureModel(int workerID) {
SearchParams.ValueSelection.MIN, opt, 16, true);
intValSel = intValConf.make();
intVarConf = new SearchParams.VarSelConf(
SearchParams.VariableSelection.FRBA, 32);
SearchParams.VariableSelection.FRBA, SearchParams.VariableTieBreaker.LARGEST_DOMAIN, 32);
intVarSel = intVarConf.make();
bb.setIntVarStrategy((vars) -> intVarSel.apply(vars, intValSel.apply(worker)));
bb.setMetaStrategy(m -> Search.lastConflict(m, 2));
Expand All @@ -540,7 +540,7 @@ private void configureModel(int workerID) {
SearchParams.ValueSelection.MIN, opt, 16, true);
intValSel = intValConf.make();
intVarConf = new SearchParams.VarSelConf(
SearchParams.VariableSelection.CHS, 32);
SearchParams.VariableSelection.CHS, SearchParams.VariableTieBreaker.SMALLEST_DOMAIN, 32);
intVarSel = intVarConf.make();
bb.setIntVarStrategy((vars) -> intVarSel.apply(vars, intValSel.apply(worker)));
bb.setMetaStrategy(m -> Search.lastConflict(m, 1));
Expand Down
11 changes: 5 additions & 6 deletions solver/src/main/java/org/chocosolver/solver/search/strategy/BlackBoxConfigurator.java
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Expand Up @@ -13,8 +13,6 @@
import org.chocosolver.solver.ResolutionPolicy;
import org.chocosolver.solver.Solver;
import org.chocosolver.solver.search.restart.AbstractRestart;
import org.chocosolver.solver.search.restart.GeometricalCutoff;
import org.chocosolver.solver.search.restart.Restarter;
import org.chocosolver.solver.search.strategy.selectors.values.RealDomainMax;
import org.chocosolver.solver.search.strategy.selectors.values.RealDomainMin;
import org.chocosolver.solver.search.strategy.selectors.variables.Cyclic;
Expand Down Expand Up @@ -161,11 +159,12 @@ public static BlackBoxConfigurator forCSP() {
SearchParams.ValSelConf defaultValSel = new SearchParams.ValSelConf(
SearchParams.ValueSelection.MIN, false, 16, true);
SearchParams.VarSelConf defaultVarSel = new SearchParams.VarSelConf(
SearchParams.VariableSelection.DOMWDEG_CACD, 32);
SearchParams.VariableSelection.DOMWDEG_CACD, SearchParams.VariableTieBreaker.LARGEST_DOMAIN, 32);
bb.setIntVarStrategy((vars) -> defaultVarSel.make().apply(vars, defaultValSel.make().apply(vars[0].getModel())));
// restart policy
bb.setRestartPolicy(s -> new Restarter(new GeometricalCutoff(5, 1.05),
c -> s.getFailCount() >= c, 50_000, true));
SearchParams.ResConf defaultResConf = new SearchParams.ResConf(
SearchParams.Restart.GEOMETRIC, 5, 1.05, 50_000, true);
bb.setRestartPolicy(defaultResConf.make());
// complementary settings
bb.setNogoodOnRestart(true)
.setRestartOnSolution(false)
Expand All @@ -186,7 +185,7 @@ public static BlackBoxConfigurator forCOP() {
SearchParams.ValSelConf defaultValSel = new SearchParams.ValSelConf(
SearchParams.ValueSelection.MIN, true, 16, true);
SearchParams.VarSelConf defaultVarSel = new SearchParams.VarSelConf(
SearchParams.VariableSelection.DOMWDEG, 32);
SearchParams.VariableSelection.DOMWDEG, SearchParams.VariableTieBreaker.SMALLEST_DOMAIN, 32);
bb.setIntVarStrategy((vars) -> defaultVarSel.make().apply(vars, defaultValSel.make().apply(vars[0].getModel())));
// restart policy
SearchParams.ResConf defaultResConf = new SearchParams.ResConf(
Expand Down
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