public Pair<List<ProgramState>, List<ProgramState>> assumeDual(ProgramState programState) {
ProgramState.Pop unstack = programState.unstackValue(1);
SymbolicValue sv = unstack.values.get(0);
List<ProgramState> falseConstraint = sv.setConstraint(unstack.state, BooleanConstraint.FALSE);
List<ProgramState> trueConstraint = sv.setConstraint(unstack.state, BooleanConstraint.TRUE);
return new Pair<>(falseConstraint, trueConstraint);
}
private static ObjectConstraint openedConstraint(
ProgramState programState, SymbolicValue value) {
final Object constraint = programState.getConstraint(value.wrappedValue());
if (constraint instanceof ObjectConstraint) {
ObjectConstraint oConstraint = (ObjectConstraint) constraint;
if (oConstraint.hasStatus(Status.OPENED)) {
return oConstraint;
}
}
return null;
}
private static ProgramState closeResource(
ProgramState programState, @Nullable final SymbolicValue target) {
if (target != null) {
ObjectConstraint oConstraint = openedConstraint(programState, target);
if (oConstraint != null) {
return programState.addConstraint(
target.wrappedValue(), oConstraint.withStatus(Status.CLOSED));
}
}
return programState;
}
public boolean isNull(ProgramState ps, SymbolicValue val) {
Object constraint = ps.getConstraint(val);
return constraint instanceof ObjectConstraint && ((ObjectConstraint) constraint).isNull();
}