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working on quantifiers

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2012-11-26 17:55:40 -08:00
parent 4f7dd08c38
commit 8612c89c54
7 changed files with 146 additions and 39 deletions
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31
src/muz_qe/pdr_util.cpp
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@ -549,7 +549,7 @@ namespace pdr {
}
}
bool model_evaluator::extract_array_func_interp(expr* a, vector<expr_ref_vector>& stores, expr_ref else_case) {
bool model_evaluator::extract_array_func_interp(expr* a, vector<expr_ref_vector>& stores, expr_ref& else_case) {
SASSERT(m_array.is_array(a));
while (m_array.is_store(a)) {
@ -582,6 +582,9 @@ namespace pdr {
stores.push_back(store);
}
else_case = g->get_else();
if (!else_case) {
return false;
}
if (!is_ground(else_case)) {
return false;
}
@ -903,6 +906,32 @@ namespace pdr {
return !has_x;
}
expr_ref model_evaluator::eval(model_ref& model, expr* e) {
expr_ref result(m);
m_model = model;
VERIFY(m_model->eval(e, result, true));
if (m_array.is_array(e)) {
vector<expr_ref_vector> stores;
expr_ref_vector args(m);
expr_ref else_case(m);
if (extract_array_func_interp(result, stores, else_case)) {
result = m_array.mk_const_array(m.get_sort(e), else_case);
while (!stores.empty() && stores.back().back() == else_case) {
stores.pop_back();
}
for (unsigned i = stores.size(); i > 0; ) {
--i;
args.resize(1);
args[0] = result;
args.append(stores[i]);
result = m_array.mk_store(args.size(), args.c_ptr());
}
return result;
}
}
return result;
}
void reduce_disequalities(model& model, unsigned threshold, expr_ref& fml) {
ast_manager& m = fml.get_manager();