/** Checks if {@code left => right}, or {@code left /\ !right} is unsat. */
public boolean impliesSMT(
ConjunctiveFormula left, ConjunctiveFormula right, Set<Variable> rightOnlyVariables) {
if (smtOptions.smt == SMTSolver.Z3) {
try {
return z3.isUnsat(
KILtoSMTLib.translateImplication(left, right, rightOnlyVariables),
smtOptions.z3ImplTimeout);
} catch (UnsupportedOperationException e) {
e.printStackTrace();
} catch (SMTTranslationFailure e) {
e.printStackTrace();
}
}
return false;
}
public boolean checkUnsat(ConjunctiveFormula constraint) {
if (smtOptions.smt != SMTSolver.Z3) {
return false;
}
if (constraint.isSubstitution()) {
return false;
}
boolean result = false;
try {
String query = KILtoSMTLib.translateConstraint(constraint);
result = z3.isUnsat(query, smtOptions.z3CnstrTimeout);
if (result && RuleAuditing.isAuditBegun()) {
System.err.println("SMT query returned unsat: " + query);
}
} catch (UnsupportedOperationException e) {
e.printStackTrace();
}
return result;
}