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fixes

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This commit is contained in:
Nikolaj Bjorner 2021-09-16 10:10:50 +01:00
parent 689c5b4e12
commit c25fd71bf4
5 changed files with 44 additions and 35 deletions
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19
src/math/polysat/explain.cpp
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@ -78,17 +78,16 @@ namespace polysat {
signed_constraint c = find_replacement(c2, v, core);
if (!c)
continue;
if (!c->contains_var(v)) {
core.keep(c); // adds propagation of c to the search stack
// NOTE: more variables than just 'v' might have been removed here (see polysat::test_p3).
// c alone (+ variables) is now enough to represent the conflict.
core.reset();
core.set(c);
return l_true;
}
else
if (c->contains_var(v))
return l_undef;
if (!c->has_bvar() || l_undef == c.bvalue(s()))
core.keep(c); // adds propagation of c to the search stack
// NOTE: more variables than just 'v' might have been removed here (see polysat::test_p3).
// c alone (+ variables) is now enough to represent the conflict.
core.reset();
core.set(c);
return l_true;
}
return l_false;
}