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detect conflicts in cut_simplifier

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-02-26 20:53:51 -08:00
parent d8423a4b46
commit dc31478d82
1 changed files with 7 additions and 0 deletions
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7
src/sat/sat_cut_simplifier.cpp
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@ -358,6 +358,13 @@ namespace sat {
}
while (first != idx);
}
for (unsigned i = s.num_vars(); i-- > 0; ) {
literal lit(i, false);
if (uf2.find(lit.index()) == uf2.find((~lit).index())) {
s.set_conflict();
return;
}
}
if (new_eq) {
elim_eqs elim(s);
elim(uf2);