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break self recursion #5937

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This commit is contained in:
Nikolaj Bjorner 2022-03-31 21:49:08 -07:00
parent dd27f7e937
commit 28e94583da
1 changed files with 3 additions and 5 deletions
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8
src/model/datatype_factory.cpp
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@ -48,10 +48,8 @@ expr * datatype_factory::get_some_value(sort * s) {
*/
expr * datatype_factory::get_last_fresh_value(sort * s) {
expr * val = nullptr;
if (m_last_fresh_value.find(s, val)) {
TRACE("datatype", tout << "cached fresh value: " << mk_pp(val, m_manager) << "\n";);
if (m_last_fresh_value.find(s, val))
return val;
}
value_set * set = get_value_set(s);
if (set->empty())
val = get_some_value(s);
@ -200,7 +198,7 @@ expr * datatype_factory::get_fresh_value(sort * s) {
if (m_util.is_recursive(s)) {
while (true) {
++num_iterations;
TRACE("datatype", tout << mk_pp(get_last_fresh_value(s), m_manager) << "\n";);
TRACE("datatype", tout << num_iterations << " " << mk_pp(get_last_fresh_value(s), m_manager) << "\n";);
ptr_vector<func_decl> const & constructors = *m_util.get_datatype_constructors(s);
for (func_decl * constructor : constructors) {
expr_ref_vector args(m_manager);
@ -219,7 +217,7 @@ expr * datatype_factory::get_fresh_value(sort * s) {
expr * maybe_new_arg = nullptr;
if (!m_util.is_datatype(s_arg))
maybe_new_arg = m_model.get_fresh_value(s_arg);
else if (num_iterations <= 1)
else if (num_iterations <= 1 || s == s_arg)
maybe_new_arg = get_almost_fresh_value(s_arg);
else
maybe_new_arg = get_fresh_value(s_arg);