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z3str3: ensure top-level free variables always participate in model construction

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Murphy Berzish 2020-01-22 15:13:56 -05:00 • committed by Nikolaj Bjorner
parent 812049ca4a
commit 237adbf40c
3 changed files with 14 additions and 3 deletions
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6
src/smt/theory_str.cpp
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@ -9175,7 +9175,7 @@ namespace smt {
} // RegexAutomata
bool needToAssignFreeVars = false;
std::set<expr*> free_variables;
expr_ref_vector free_variables(m);
std::set<expr*> unused_internal_variables;
{ // Z3str2 free variables check
std::map<expr*, int>::iterator itor = varAppearInAssign.begin();
@ -9196,7 +9196,7 @@ namespace smt {
if (!hasEqcValue) {
TRACE("str", tout << "found free variable " << mk_pp(itor->first, m) << std::endl;);
needToAssignFreeVars = true;
free_variables.insert(itor->first);
free_variables.push_back(itor->first);
// break;
} else {
// debug
@ -9413,7 +9413,7 @@ namespace smt {
expr_ref_vector precondition(m);
expr_ref_vector cex(m);
lbool model_status = fixed_length_model_construction(assignments, precondition, candidate_model, cex);
lbool model_status = fixed_length_model_construction(assignments, precondition, free_variables, candidate_model, cex);
if (model_status == l_true) {
m_stats.m_solved_by = 2;