rClause GenPWAgg::checkHeadPropagationForAgg(bool& propagations, const Agg& agg, const minmaxBounds& bound) {
auto confl = nullPtrClause;
auto propagatehead = false;
if (agg.hasLB() && bound.max < agg.getBound()) {
propagatehead = true;
} else if (agg.hasUB() && agg.getBound() < bound.min) {
propagatehead = true;
}
if (propagatehead) {
propagations = true;
confl = getSet().notifySolver(new HeadReason(agg, agg.getHead()));
notifyFirstPropagation(agg.getHead());
}
return confl;
}
/**
* Returns true if this aggregate can be propagated in the initialization, so it will never change truth value
* and can be left out of any propagations.
* Returns false if the aggregate is certainly unsat.
*/
lbool FWAgg::initialize(const Agg& agg) {
auto confl = nullPtrClause;
auto hv = canPropagateHead(agg, getCC(), getCP());
bool alwaystrue = false;
if (hv != l_Undef) {
alwaystrue = true;
}
if (hv == l_True) {
confl = getSet().notifySolver(new HeadReason(agg, agg.getHead()));
} else if (hv == l_False) {
confl = getSet().notifySolver(new HeadReason(agg, not agg.getHead()));
}
if (confl != nullPtrClause) {
return l_False;
}
return alwaystrue ? l_True : l_Undef;
}