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Fix issue https://z3.codeplex.com/workitem/47

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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2013-06-13 13:45:14 -07:00
parent 2c8b314a15
commit 40b1137b30
1 changed files with 8 additions and 0 deletions
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8
src/sat/sat_asymm_branch.cpp
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@ -72,11 +72,14 @@ namespace sat {
int limit = -static_cast<int>(m_asymm_branch_limit);
std::stable_sort(s.m_clauses.begin(), s.m_clauses.end(), clause_size_lt());
m_counter -= s.m_clauses.size();
SASSERT(s.m_qhead == s.m_trail.size());
clause_vector::iterator it = s.m_clauses.begin();
clause_vector::iterator it2 = it;
clause_vector::iterator end = s.m_clauses.end();
try {
for (; it != end; ++it) {
if (s.inconsistent())
break;
SASSERT(s.m_qhead == s.m_trail.size());
if (m_counter < limit || s.inconsistent()) {
*it2 = *it;
@ -111,6 +114,7 @@ namespace sat {
bool asymm_branch::process(clause & c) {
TRACE("asymm_branch_detail", tout << "processing: " << c << "\n";);
SASSERT(s.scope_lvl() == 0);
SASSERT(s.m_qhead == s.m_trail.size());
#ifdef Z3DEBUG
unsigned trail_sz = s.m_trail.size();
#endif
@ -143,6 +147,7 @@ namespace sat {
SASSERT(!s.inconsistent());
SASSERT(s.scope_lvl() == 0);
SASSERT(trail_sz == s.m_trail.size());
SASSERT(s.m_qhead == s.m_trail.size());
if (i == sz - 1) {
// clause size can't be reduced.
s.attach_clause(c);
@ -181,15 +186,18 @@ namespace sat {
s.assign(c[0], justification());
s.del_clause(c);
s.propagate_core(false);
SASSERT(s.inconsistent() || s.m_qhead == s.m_trail.size());
return false; // check_missed_propagation() may fail, since m_clauses is not in a consistent state.
case 2:
SASSERT(s.value(c[0]) == l_undef && s.value(c[1]) == l_undef);
s.mk_bin_clause(c[0], c[1], false);
s.del_clause(c);
SASSERT(s.m_qhead == s.m_trail.size());
return false;
default:
c.shrink(new_sz);
s.attach_clause(c);
SASSERT(s.m_qhead == s.m_trail.size());
return true;
}
}