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hoist out fixed-bits reasoning into self-contained module

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without dependencies on viable entries
This commit is contained in:
Nikolaj Bjorner 2023-12-25 10:59:27 -08:00
parent 658f079efd
commit b1072d0a1c
8 changed files with 183 additions and 158 deletions
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19
src/sat/smt/polysat_solver.cpp
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@ -223,6 +223,18 @@ namespace polysat {
level = std::max(level, s().lvl(lit));
return level;
}
else if (d.is_fixed_claim()) {
auto const& f = d.fixed();
sat::literal_vector lits;
std::function<void(euf::enode*, euf::enode*)> consume = [&](auto* a, auto* b) {
ctx.get_eq_antecedents(a, b, lits);
};
explain_fixed(f.v, f.lo, f.hi, f.value, consume);
unsigned level = 0;
for (auto lit : lits)
level = std::max(level, s().lvl(lit));
return level;
}
else {
SASSERT(d.is_axiom());
return 0;
@ -281,6 +293,13 @@ namespace polysat {
};
explain_slice(v, w, offset, consume);
}
else if (d.is_fixed_claim()) {
auto const& f = d.fixed();
std::function<void(euf::enode*, euf::enode*)> consume = [&](auto* a, auto* b) {
lits.push_back(~eq_internalize(a, b));
};
explain_fixed(f.v, f.lo, f.hi, f.value, consume);
}
else {
SASSERT(d.is_axiom());
}