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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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10
src/math/polysat/explain.cpp
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@ -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;
}