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fix bca condition for tautology check

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-10-25 16:46:22 -07:00
parent ac0202630e
commit 0919fd4075
2 changed files with 14 additions and 5 deletions
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10
src/sat/sat_simplifier.cpp
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@ -1070,7 +1070,7 @@ namespace sat {
for (; !it.at_end(); it.next()) {
bool tautology = false;
clause & c = it.curr();
if (c.is_blocked()) continue;
if (c.is_blocked() && !adding) continue;
for (literal lit : c) {
if (s.is_marked(~lit) && lit != ~l) {
tautology = true;
@ -1322,8 +1322,12 @@ namespace sat {
}
if (!found) {
IF_VERBOSE(100, verbose_stream() << "bca " << l << " " << l2 << "\n";);
s.get_wlist(~l).push_back(watched(l2, true));
s.get_wlist(~l2).push_back(watched(l, true));
watched w1(l2, false);
w1.set_blocked();
watched w2(l, false);
w2.set_blocked();
s.get_wlist(~l).push_back(w1);
s.get_wlist(~l2).push_back(w2);
++s.m_num_bca;
}
}