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Integrate univariate solver in polysat

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This commit is contained in:
Jakob Rath 2022-03-18 15:43:06 +01:00
parent 9d47d7959d
commit 509a007ed7
9 changed files with 192 additions and 50 deletions
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29
src/math/polysat/constraint.cpp
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@ -324,35 +324,6 @@ namespace polysat {
return out.str();
}
bool constraint::propagate(solver& s, bool is_positive, pvar v) {
LOG_H3("Propagate " << s.m_vars[v] << " in " << signed_constraint(this, is_positive));
SASSERT(!vars().empty());
unsigned idx = 0;
if (var(idx) != v)
idx = 1;
SASSERT(v == var(idx));
// find other watch variable.
for (unsigned i = vars().size(); i-- > 2; ) {
unsigned other_v = vars()[i];
if (!s.is_assigned(other_v)) {
s.add_watch({this, is_positive}, other_v);
std::swap(vars()[idx], vars()[i]);
return true;
}
}
// at most one variable remains unassigned.
unsigned other_v = var(idx);
propagate_core(s, is_positive, v, other_v);
return false;
}
void constraint::propagate_core(solver& s, bool is_positive, pvar v, pvar other_v) {
(void)v;
(void)other_v;
narrow(s, is_positive, false);
}
unsigned constraint::level(solver& s) const {
if (s.m_bvars.value(sat::literal(bvar())) != l_undef)
return s.m_bvars.level(bvar());