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change handling of weak array mode. Insert weak delay variables into a queue that gets consumed by the next propagation when the array_weak parameter is changed #2686

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-11-19 21:17:36 -08:00
parent e45bafe9bf
commit 566eacd424
5 changed files with 39 additions and 41 deletions
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19
src/smt/theory_array.cpp
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@ -104,10 +104,6 @@ namespace smt {
for (enode* store : d->m_parent_stores) {
SASSERT(is_store(store));
if (!m_params.m_array_cg || store->is_cgr()) {
if (m_params.m_array_weak) {
found_unsupported_op(store->get_owner());
break;
}
instantiate_axiom2b(s, store);
}
}
@ -125,10 +121,6 @@ namespace smt {
if (d->m_prop_upward && !m_params.m_array_delay_exp_axiom) {
for (enode* n : d->m_parent_selects) {
if (!m_params.m_array_cg || n->is_cgr()) {
if (m_params.m_array_weak) {
found_unsupported_op(s);
break;
}
instantiate_axiom2b(n, s);
}
}
@ -152,13 +144,13 @@ namespace smt {
v = find(v);
var_data * d = m_var_data[v];
if (!d->m_prop_upward) {
if (m_params.m_array_weak) {
add_weak_var(v);
return;
}
TRACE("array", tout << "#" << v << "\n";);
m_trail_stack.push(reset_flag_trail<theory_array>(d->m_prop_upward));
d->m_prop_upward = true;
if (m_params.m_array_weak) {
found_unsupported_op(v);
return;
}
if (!m_params.m_array_delay_exp_axiom)
instantiate_axiom2b_for(v);
for (enode * n : d->m_stores)
@ -401,7 +393,8 @@ namespace smt {
r = assert_delayed_axioms();
}
}
if (r == FC_DONE && m_found_unsupported_op && !get_context().get_fparams().m_array_fake_support)
bool should_giveup = m_found_unsupported_op || has_propagate_up_trail();
if (r == FC_DONE && should_giveup && !get_context().get_fparams().m_array_fake_support)
r = FC_GIVEUP;
CTRACE("array", r != FC_DONE || m_found_unsupported_op, tout << r << "\n";);
return r;