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redo purification

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-10-29 11:06:31 -07:00
parent da0e140e1c
commit 2e684d58d2
5 changed files with 68 additions and 88 deletions
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53
src/qe/mbp/mbp_plugin.cpp
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@ -325,57 +325,4 @@ namespace mbp {
}
}
void project_plugin::purify(euf_inverter& inv, model& mdl, app_ref_vector const& vars, expr_ref_vector& lits) {
TRACE("mbp", tout << lits << "\n" << mdl << "\n";);
model_evaluator eval(mdl);
extract_literals(mdl, vars, lits);
if (!m.inc())
return;
eval.set_expand_array_equalities(true);
m_non_ground.reset();
m_to_visit.reset();
m_visited.reset();
m_cache.reset();
m_pure_eqs.reset();
for (expr* v : vars)
m_non_ground.mark(v);
for (unsigned i = 0; m.inc() && i < lits.size(); ++i)
lits[i] = purify(inv, eval, lits.get(i), lits);
lits.append(m_pure_eqs);
TRACE("mbp", tout << lits << "\n";);
}
expr* project_plugin::purify(euf_inverter& inv, model_evaluator& eval, expr* e, expr_ref_vector& lits) {
mark_non_ground(e);
m_to_visit.push_back(e);
while (!m_to_visit.empty()) {
expr* t = m_to_visit.back();
if (m_cache.get(t->get_id(), nullptr))
m_to_visit.pop_back();
else if (!is_app(t) || !m_non_ground.is_marked(t)) {
m_cache.setx(t->get_id(), t);
m_to_visit.pop_back();
}
else
purify_app(inv, eval, to_app(t), lits);
}
return m_cache.get(e->get_id());
}
void project_plugin::purify_app(euf_inverter& inv, model_evaluator& eval, app* t, expr_ref_vector& lits) {
if (is_uninterp(t) && t->get_num_args() > 0) {
expr_ref t_value = eval(t);
expr* s = inv.invert_app(t, t_value);
m_cache.setx(t->get_id(), s);
if (s != t)
m_pure_eqs.push_back(m.mk_eq(t, s));
unsigned i = 0;
for (expr* arg : *t)
inv.invert_arg(t, i++, eval(arg), lits);
m_to_visit.pop_back();
}
else
visit_app(t);
}
}