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Try to produce an op_constraint lemma before invoking the fallback solver

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This commit is contained in:
Jakob Rath 2022-11-30 12:13:47 +01:00
parent 2bc1b3a6dd
commit b4b94c954b
3 changed files with 37 additions and 18 deletions
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9
src/math/polysat/viable.cpp
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@ -837,17 +837,17 @@ namespace polysat {
m_constraints[v].pop_back();
}
bool viable_fallback::check_constraints(pvar v) {
for (auto const& c : m_constraints[v]) {
signed_constraint viable_fallback::find_violated_constraint(pvar v) {
for (signed_constraint const c : m_constraints[v]) {
// for this check, all variables need to be assigned
DEBUG_CODE(for (pvar w : c->vars()) { SASSERT(s.is_assigned(w)); });
if (c.is_currently_false(s)) {
LOG(assignment_pp(s, v, s.get_value(v)) << " violates constraint " << lit_pp(s, c));
return false;
return c;
}
SASSERT(c.is_currently_true(s));
}
return true;
return {};
}
dd::find_t viable_fallback::find_viable(pvar v, rational& out_val) {
@ -869,6 +869,7 @@ namespace polysat {
auto const& cs = m_constraints[v];
for (unsigned i = cs.size(); i-- > 0; ) {
LOG("Univariate constraint: " << cs[i]);
cs[i].add_to_univariate_solver(s, *us, i);
}