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fix bug in blocked clause elimination: it was ignoring unit literals

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-03-31 13:26:20 -07:00
parent aa2721517b
commit 55eb11d91b
5 changed files with 33 additions and 37 deletions
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13
src/sat/sat_solver.cpp
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@ -333,13 +333,6 @@ namespace sat {
}
void solver::mk_bin_clause(literal l1, literal l2, bool learned) {
#if 0
if ((l1 == literal(5981, false) && l2 == literal(16764, false)) ||
(l2 == literal(5981, false) && l1 == literal(16764, false))) {
IF_VERBOSE(0, display(verbose_stream()));
//VERIFY(false);
}
#endif
if (find_binary_watch(get_wlist(~l1), ~l2)) {
assign(l1, justification());
return;
@ -487,6 +480,8 @@ namespace sat {
return reinit;
}
static unsigned s_count = 0;
void solver::attach_clause(clause & c, bool & reinit) {
SASSERT(c.size() > 2);
reinit = false;
@ -1674,7 +1669,9 @@ namespace sat {
if (!m_clone->check_model(m_model)) {
//IF_VERBOSE(0, display(verbose_stream()));
//IF_VERBOSE(0, display_watches(verbose_stream()));
//IF_VERBOSE(0, m_mc.display(verbose_stream()));
IF_VERBOSE(0, m_mc.display(verbose_stream()));
IF_VERBOSE(0, display_units(verbose_stream()));
//IF_VERBOSE(0, m_clone->display(verbose_stream() << "clone\n"));
throw solver_exception("check model failed (for cloned solver)");
}
}