@Override
public ESat isEntailed() {
if (!PropUtil.isKerSubsetEnv(s1, s2) || !PropUtil.isKerSubsetEnv(s2, s1)) {
return ESat.FALSE;
}
if (s1.isInstantiated() && s2.isInstantiated()) {
return ESat.TRUE;
}
int setIntersection = 0;
ISetIterator iter = s1.getUB().iterator();
while (iter.hasNext()) {
int i = iter.nextInt();
if (s2.getUB().contains(i)) {
setIntersection++;
}
}
if (setIntersection < s1.getCard().getLB() || setIntersection < s2.getCard().getLB()) {
return ESat.FALSE;
}
return ESat.UNDEFINED;
}
