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rewind qhead to ensure re-propagation after cancellation

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-10-27 16:23:33 -07:00
parent 41deae52c6
commit 7d7e03e377
3 changed files with 8 additions and 2 deletions
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1
src/smt/smt_consequences.cpp
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@ -258,6 +258,7 @@ namespace smt {
TRACE("context", tout << is_sat << "\n";);
return is_sat;
}
obj_map<expr, expr*> var2val;
index_set _assumptions;
for (unsigned i = 0; i < assumptions.size(); ++i) {

8
src/smt/smt_context.cpp
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@ -1749,8 +1749,10 @@ namespace smt {
unsigned qhead = m_qhead;
if (!bcp())
return false;
if (get_cancel_flag())
if (get_cancel_flag()) {
m_qhead = qhead;
return true;
}
SASSERT(!inconsistent());
propagate_relevancy(qhead);
if (inconsistent())
@ -1768,8 +1770,10 @@ namespace smt {
m_qmanager->propagate();
if (inconsistent())
return false;
if (resource_limits_exceeded())
if (resource_limits_exceeded()) {
m_qhead = qhead;
return true;
}
if (!can_propagate()) {
CASSERT("diseq_bug", inconsistent() || check_missing_diseq_conflict());
CASSERT("eqc_bool", check_eqc_bool_assignment());