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fix unsoundness bug in axiomatization of str.at. #1067

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-06-13 19:02:59 -07:00
parent 6bce173248
commit a59ee8032c
3 changed files with 5 additions and 4 deletions
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4
src/smt/smt_conflict_resolution.cpp
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@ -1405,6 +1405,7 @@ namespace smt {
switch (js.get_kind()) {
case b_justification::CLAUSE: {
clause * cls = js.get_clause();
TRACE("unsat_core_bug", m_ctx.display_clause_detail(tout, cls););
unsigned num_lits = cls->get_num_literals();
unsigned i = 0;
if (consequent != false_literal) {
@ -1422,8 +1423,9 @@ namespace smt {
process_antecedent_for_unsat_core(~l);
}
justification * js = cls->get_justification();
if (js)
if (js) {
process_justification_for_unsat_core(js);
}
break;
}
case b_justification::BIN_CLAUSE: