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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
View file

@ -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;

2
src/smt/theory_array.h
View file

@ -69,7 +69,7 @@ namespace smt {
void reset_eh() override;
void init_search_eh() override { m_final_check_idx = 0; }
virtual void set_prop_upward(theory_var v);
void set_prop_upward(theory_var v) override;
virtual void set_prop_upward(enode* n);
virtual void set_prop_upward(theory_var v, var_data* d);

21
src/smt/theory_array_base.cpp
View file

@ -28,10 +28,16 @@ namespace smt {
theory_array_base::theory_array_base(ast_manager & m):
theory(m.mk_family_id("array")),
m_found_unsupported_op(false)
m_found_unsupported_op(false),
m_array_weak_head(0)
{
}
void theory_array_base::add_weak_var(theory_var v) {
get_context().push_trail(push_back_vector<context, svector<theory_var>>(m_array_weak_trail));
m_array_weak_trail.push_back(v);
}
void theory_array_base::found_unsupported_op(expr * n) {
if (!get_context().get_fparams().m_array_fake_support && !m_found_unsupported_op) {
TRACE("array", tout << mk_ll_pp(n, get_manager()) << "\n";);
@ -404,7 +410,12 @@ namespace smt {
}
bool theory_array_base::can_propagate() {
return !m_axiom1_todo.empty() || !m_axiom2_todo.empty() || !m_extensionality_todo.empty() || !m_congruent_todo.empty();
return
!m_axiom1_todo.empty() ||
!m_axiom2_todo.empty() ||
!m_extensionality_todo.empty() ||
!m_congruent_todo.empty() ||
(!get_context().get_fparams().m_array_weak && has_propagate_up_trail());
}
void theory_array_base::propagate() {
@ -421,6 +432,12 @@ namespace smt {
assert_congruent_core(m_congruent_todo[i].first, m_congruent_todo[i].second);
m_extensionality_todo.reset();
m_congruent_todo.reset();
if (!get_context().get_fparams().m_array_weak && has_propagate_up_trail()) {
get_context().push_trail(value_trail<context, unsigned>(m_array_weak_head));
for (; m_array_weak_head < m_array_weak_trail.size(); ++m_array_weak_head) {
set_prop_upward(m_array_weak_trail[m_array_weak_head]);
}
}
}
}

6
src/smt/theory_array_base.h
View file

@ -30,7 +30,11 @@ namespace smt {
friend class theory_array_bapa;
protected:
bool m_found_unsupported_op;
unsigned m_array_weak_head;
svector<theory_var> m_array_weak_trail;
bool has_propagate_up_trail() const { return m_array_weak_head < m_array_weak_trail.size(); }
void add_weak_var(theory_var v);
virtual void set_prop_upward(theory_var v) {}
void found_unsupported_op(expr * n);
void found_unsupported_op(enode* n) { found_unsupported_op(n->get_owner()); }
void found_unsupported_op(theory_var v) { found_unsupported_op(get_enode(v)->get_owner()); }

32
src/smt/theory_array_full.cpp
View file

@ -91,10 +91,6 @@ namespace smt {
if (!m_params.m_array_delay_exp_axiom && d->m_prop_upward) {
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_select_map_axiom(n, s);
}
}
@ -108,13 +104,13 @@ 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;
}
m_trail_stack.push(reset_flag_trail<theory_array>(d->m_prop_upward));
d->m_prop_upward = true;
TRACE("array", tout << "#" << v << "\n";);
if (m_params.m_array_weak) {
found_unsupported_op(v);
return;
}
if (!m_params.m_array_delay_exp_axiom) {
instantiate_axiom2b_for(v);
instantiate_axiom_map_for(v);
@ -364,12 +360,7 @@ namespace smt {
}
if (!m_params.m_array_delay_exp_axiom && d->m_prop_upward) {
if (m_params.m_array_weak) {
found_unsupported_op(v);
}
else {
instantiate_parent_stores_default(v);
}
instantiate_parent_stores_default(v);
}
}
@ -393,10 +384,6 @@ namespace smt {
for (enode * map : d_full->m_parent_maps) {
SASSERT(is_map(map));
if (!m_params.m_array_cg || map->is_cgr()) {
if (m_params.m_array_weak) {
found_unsupported_op(s);
break;
}
instantiate_select_map_axiom(s, map);
}
}
@ -757,10 +744,7 @@ namespace smt {
if (d->m_prop_upward && instantiate_axiom_map_for(v))
r = FC_CONTINUE;
if (d->m_prop_upward) {
if (m_params.m_array_weak) {
found_unsupported_op(v);
}
else if (instantiate_parent_stores_default(v))
if (instantiate_parent_stores_default(v))
r = FC_CONTINUE;
}
}
@ -775,8 +759,8 @@ namespace smt {
if (r == FC_DONE && m_bapa) {
r = m_bapa->final_check();
}
if (r == FC_DONE && m_found_unsupported_op)
bool should_giveup = m_found_unsupported_op || has_propagate_up_trail();
if (r == FC_DONE && should_giveup)
r = FC_GIVEUP;
return r;
}