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Should we really prefer bit constraints?

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This commit is contained in:
Jakob Rath 2023-11-06 10:41:12 +01:00
parent 625ec18b0f
commit ec64b93edb
1 changed files with 6 additions and 1 deletions
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7
src/math/polysat/viable.cpp
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@ -1065,8 +1065,13 @@ namespace {
return false;
}
// just override; we prefer bit constraints over parity as those are easier for subsumption to remove
// do we just introduce a new justification here that subsumption will remove anyway?
// the only way it will not is if all bits are overwritten like this.
// but in that case we basically replace one parity constraint by multiple bit constraints?
// verbose_stream() << "Adding bit constraint: " << e->src[0] << " (" << bit.position << ")\n";
out_fbi.set_just(bit.position, e1);
if (prev == l_undef) {
out_fbi.set_just(bit.position, e1);
}
}
else if (src->is_eq() &&
simplify_clause::get_lsb(s.subst(src->to_ule().lhs()), s.subst(src->to_ule().rhs()), p, lsb, src.is_positive()) && p.is_var()) {