@Override
public ESat isEntailed() {
if (set.getEnvelopeSize() == 0) {
if (notEmpty) {
return ESat.FALSE;
} else {
return ESat.TRUE;
}
}
int lb = min.getLB();
int ub = min.getUB();
for (int j = set.getKernelFirst(); j != SetVar.END; j = set.getKernelNext()) {
if (get(j) < lb) {
return ESat.FALSE;
}
}
int minVal = Integer.MAX_VALUE;
for (int j = set.getEnvelopeFirst(); j != SetVar.END; j = set.getEnvelopeNext()) {
if (minVal > get(j)) {
minVal = get(j);
}
}
if (minVal > ub && (notEmpty || set.getKernelSize() > 0)) {
return ESat.FALSE;
}
if (isCompletelyInstantiated()) {
return ESat.TRUE;
}
return ESat.UNDEFINED;
}
@Override
public void propagate(int evtmask) throws ContradictionException {
for (int j = set.getKernelFirst(); j != SetVar.END; j = set.getKernelNext()) {
min.updateUpperBound(get(j), this);
}
int minVal = Integer.MAX_VALUE;
int lb = min.getLB();
for (int j = set.getEnvelopeFirst(); j != SetVar.END; j = set.getEnvelopeNext()) {
int k = get(j);
if (k < lb) {
set.removeFromEnvelope(j, this);
} else {
if (minVal > k) {
minVal = k;
}
}
}
if (notEmpty || set.getKernelSize() > 0) {
min.updateLowerBound(minVal, this);
}
}