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bug fixes

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-02-19 21:49:03 -08:00
parent bb4888ce31
commit 4c1379e8c9
22 changed files with 238 additions and 580 deletions
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6
src/sat/sat_big.cpp
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@ -169,6 +169,7 @@ namespace sat {
unsigned idx = 0;
unsigned elim = 0;
for (watch_list & wlist : s.m_watches) {
if (s.inconsistent()) break;
literal u = to_literal(idx++);
watch_list::iterator it = wlist.begin();
watch_list::iterator itprev = it;
@ -179,6 +180,10 @@ namespace sat {
literal v = w.get_literal();
if (reaches(u, v) && u != get_parent(v)) {
++elim;
if (find_binary_watch(wlist, ~v)) {
IF_VERBOSE(10, verbose_stream() << "binary: " << ~u << "\n");
s.assign(~u, justification());
}
// could turn non-learned non-binary tautology into learned binary.
s.get_wlist(~v).erase(watched(~u, w.is_learned()));
continue;
@ -189,6 +194,7 @@ namespace sat {
}
wlist.set_end(itprev);
}
s.propagate(false);
return elim;
}