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fix #4812

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This commit is contained in:
Nikolaj Bjorner 2020-11-22 16:21:19 -08:00
parent 193ca57444
commit 1008b2d4cb
1 changed files with 9 additions and 4 deletions
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13
src/model/datatype_factory.cpp
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@ -151,9 +151,13 @@ expr * datatype_factory::get_fresh_value(sort * s) {
// Traverse constructors, and try to invoke get_fresh_value of one of the
// arguments (if the argument is not a sibling datatype of s).
// Two datatypes are siblings if they were defined together in the same mutually recursive definition.
ptr_vector<func_decl> const & constructors = *m_util.get_datatype_constructors(s);
ptr_vector<func_decl> const& constructors = *m_util.get_datatype_constructors(s);
for (func_decl * constructor : constructors) {
retry_value:
expr_ref_vector args(m_manager);
expr_ref new_value(m_manager);
bool found_fresh_arg = false;
unsigned num = constructor->get_arity();
for (unsigned i = 0; i < num; i++) {
@ -169,10 +173,11 @@ expr * datatype_factory::get_fresh_value(sort * s) {
expr * some_arg = m_model.get_some_value(s_arg);
args.push_back(some_arg);
}
expr_ref new_value(m_manager);
new_value = m_manager.mk_app(constructor, args);
CTRACE("datatype", found_fresh_arg && set->contains(new_value), tout << mk_pp(new_value, m_manager) << "\n";);
SASSERT(!found_fresh_arg || !set->contains(new_value));
CTRACE("datatype", found_fresh_arg && set->contains(new_value), tout << "seen: " << new_value << "\n";);
if (found_fresh_arg && set->contains(new_value))
goto retry_value;
if (!set->contains(new_value)) {
register_value(new_value);
if (m_util.is_recursive(s))