// remove from clauses the clauses that are subsumed by clauses in pruningSet
public CNF pruneWith(Collection<Clause> clauses, Collection<Clause> pruningSet)
throws ParseException {
CNF result = new CNF();
if (!pruneInDepth)
for (Clause cl : clauses) {
boolean toKeep = true;
for (Clause cl2 : pruningSet) {
if (cl2.subsumes(cl)) {
toKeep = false;
break;
}
}
if (toKeep) result.add(cl);
}
else {
result.addAll(
CFSolver.pruneClauseSetFromCons(
getEnv(),
clauses,
pruningSet,
true,
theory.getDepthLimit(),
-1,
stats.getSolarCtrList()));
}
return result;
}
public Collection<Clause> computeNewCons(Collection<Clause> newCl) throws ParseException {
if (Thread.currentThread().isInterrupted()) return null;
CNF result = new CNF();
// prune(newCl);
CNF axioms = new CNF(theory.getAxioms());
if (newConsAsAxiom) axioms.addAll(listCsq);
else axioms.addAll(receivedCl);
CNF prunedTC = pruneWith(newCl, axioms);
if (newConsAsAxiom) prunedTC = pruneWith(prunedTC, receivedCl);
else prunedTC = pruneWith(prunedTC, listCsq);
if (verbose) {
System.out.println(this + " receives " + newCl);
System.out.println("After pruning " + prunedTC);
System.out.println("Input Languages : " + inputLanguages);
}
if (prunedTC.isEmpty()) return result;
// determine pField as LP, Output Language and reduc(newCl, OutputL)
PField originalPField = theory.getPField();
PField computationPField = addReduc(outputLanguage, newCl);
computationPField =
IndepPField.mergeWith(
getEnv(),
getOptions(),
computationPField,
originalPField,
IndepPField.MRG_UNION_INITFIT);
if (Thread.currentThread().isInterrupted()) return null;
// compute newcarc
SolProblem pb = new SolProblem(getEnv(), getOptions(), axioms, prunedTC, computationPField);
pb.setDepthLimit(theory.getDepthLimit());
boolean incremental = false;
boolean trueNC = false;
CFSolver.solveToClause(pb, -1, stats.getSolarCtrList(), result, incremental, trueNC);
if (Thread.currentThread().isInterrupted()) return null;
// update receivedCl (after computation in case so that original state is used during it)
receivedCl = pruneWith(receivedCl, prunedTC);
receivedCl.addAll(prunedTC);
return result;
}