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Fixed inconsistent state upon solver interruption. Partially fixes #951.

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This commit is contained in:
Christoph M. Wintersteiger 2017-07-21 17:42:48 +01:00
parent 943dc8118a
commit faa19117e4
4 changed files with 38 additions and 31 deletions
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13
src/smt/cached_var_subst.cpp
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@ -61,7 +61,17 @@ void cached_var_subst::operator()(quantifier * qa, unsigned num_bindings, smt::e
return;
}
SASSERT(entry->get_data().m_value == 0);
try {
m_proc(qa->get_expr(), new_key->m_num_bindings, new_key->m_bindings, result);
}
catch (...) {
// CMW: The var_subst reducer was interrupted and m_instances is
// in an inconsistent state; we need to remove (new_key, 0).
m_instances.remove(new_key);
throw; // Throw on to smt::qi_queue/smt::solver.
}
// cache result
entry->get_data().m_value = result;
@ -74,6 +84,3 @@ void cached_var_subst::operator()(quantifier * qa, unsigned num_bindings, smt::e
m_refs.push_back(new_key->m_bindings[i]);
m_refs.push_back(result);
}