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z3str3: set up axioms on string terms that are added during the search

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Murphy Berzish 2019-10-17 14:13:02 -04:00 • committed by Nikolaj Bjorner
parent 9ae1a6f061
commit f91af02675
2 changed files with 19 additions and 1 deletions
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17
src/smt/theory_str.cpp
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@ -8160,6 +8160,16 @@ namespace smt {
sort * rhs_sort = m.get_sort(rhs);
sort * str_sort = u.str.mk_string_sort();
// Pick up new terms added during the search (e.g. recursive function expansion).
if (!existing_toplevel_exprs.contains(lhs)) {
existing_toplevel_exprs.insert(lhs);
set_up_axioms(lhs);
}
if (!existing_toplevel_exprs.contains(rhs)) {
existing_toplevel_exprs.insert(rhs);
set_up_axioms(rhs);
}
if (lhs_sort != str_sort || rhs_sort != str_sort) {
TRACE("str", tout << "skip equality: not String sort" << std::endl;);
return;
@ -8615,7 +8625,12 @@ namespace smt {
}
void theory_str::assign_eh(bool_var v, bool is_true) {
TRACE("str", tout << "assert: v" << v << " #" << get_context().bool_var2expr(v)->get_id() << " is_true: " << is_true << std::endl;);
expr * e = get_context().bool_var2expr(v);
TRACE("str", tout << "assert: v" << v << " " << mk_pp(e, get_manager()) << " is_true: " << is_true << std::endl;);
if (!existing_toplevel_exprs.contains(e)) {
existing_toplevel_exprs.insert(e);
set_up_axioms(e);
}
}
void theory_str::push_scope_eh() {

3
src/smt/theory_str.h
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@ -346,6 +346,9 @@ protected:
// include an occurrence of the term for which axioms are being generated
obj_hashtable<expr> axiomatized_terms;
// hashtable of all top-level exprs for which set_up_axioms() has been called
obj_hashtable<expr> existing_toplevel_exprs;
int tmpStringVarCount;
int tmpXorVarCount;
int tmpLenTestVarCount;