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fixes

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-09-21 09:44:37 -07:00
parent 23963f274d
commit 0426b23d0c
2 changed files with 15 additions and 9 deletions
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14
src/math/polysat/conflict.cpp
View file

@ -68,7 +68,7 @@ namespace polysat {
m_conflict_var = null_var;
m_saturation_premises.reset();
m_bailout = false;
SASSERT(empty());
SASSERT(empty());
}
/**
@ -163,8 +163,6 @@ namespace polysat {
SASSERT(std::all_of(m_constraints.begin(), m_constraints.end(), [](auto c){ return !c->has_bvar(); }));
bool core_has_pos = contains_literal(sat::literal(var));
bool core_has_neg = contains_literal(~sat::literal(var));
std::cout << cl << "\n";
std::cout << *this << "\n";
DEBUG_CODE({
bool clause_has_pos = std::count(cl.begin(), cl.end(), sat::literal(var)) > 0;
bool clause_has_neg = std::count(cl.begin(), cl.end(), ~sat::literal(var)) > 0;
@ -173,12 +171,14 @@ namespace polysat {
SASSERT((core_has_pos && clause_has_pos) || (core_has_neg && clause_has_neg));
});
sat::literal var_lit(var);
if (core_has_pos)
remove_literal(sat::literal(var));
remove_literal(var_lit);
if (core_has_neg)
remove_literal(~sat::literal(var));
unset_bmark(var);
remove_literal(~var_lit);
unset_mark(m.lookup(var_lit));
for (sat::literal lit : cl)
if (lit.var() != var)
insert(m.lookup(~lit));

10
src/math/polysat/explain.cpp
View file

@ -98,7 +98,7 @@ namespace polysat {
while (progress) {
progress = false;
for (auto c : core) {
if (is_positive_equality_over(v, c) && reduce_by(v, c, core)) {
if (is_positive_equality_over(v, c) && c.is_currently_true(s()) && reduce_by(v, c, core)) {
progress = true;
break;
}
@ -125,10 +125,16 @@ namespace polysat {
auto c2 = s().ule(a, b);
if (!c.is_positive())
c2 = ~c2;
SASSERT(c2.is_currently_false(s()));
SASSERT(c2.is_currently_false(s()));
if (!c2->has_bvar() || l_undef == c2.bvalue(s()))
core.keep(c2); // adds propagation of c to the search stack
core.reset();
if (c2.bvalue(s()) == l_false) {
core.insert(eq);
core.insert(c);
core.insert(~c2);
return false;
}
core.set(c2);
return true;
}