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adding ack/model

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-08-28 12:55:31 -07:00
parent 7f0b5bc129
commit 4244ce4aad
31 changed files with 831 additions and 914 deletions
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45
src/ast/euf/euf_egraph.cpp
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@ -255,7 +255,10 @@ namespace euf {
explanations up to the least common ancestors.
*/
void egraph::push_congruence(enode* n1, enode* n2, bool comm) {
SASSERT(is_app(n1->get_owner()));
SASSERT(n1->get_decl() == n2->get_decl());
if (m_used_cc)
m_used_cc(to_app(n1->get_owner()), to_app(n2->get_owner()));
if (comm &&
n1->get_arg(0)->get_root() == n2->get_arg(1)->get_root() &&
n1->get_arg(1)->get_root() == n2->get_arg(0)->get_root()) {
@ -268,30 +271,28 @@ namespace euf {
push_lca(n1->get_arg(i), n2->get_arg(i));
}
void egraph::push_lca(enode* a, enode* b) {
enode* egraph::find_lca(enode* a, enode* b) {
SASSERT(a->get_root() == b->get_root());
enode* n = a;
while (n) {
n->mark2();
n = n->m_target;
}
n = b;
while (n) {
if (n->is_marked2())
n->unmark2();
else if (!n->is_marked1())
m_todo.push_back(n);
n = n->m_target;
}
n = a;
while (n->is_marked2()) {
n->unmark2();
if (!n->is_marked1())
m_todo.push_back(n);
a->mark2_targets<true>();
while (!b->is_marked2())
b = b->m_target;
a->mark2_targets<false>();
return b;
}
void egraph::push_to_lca(enode* n, enode* lca) {
while (n != lca) {
m_todo.push_back(n);
n = n->m_target;
}
}
void egraph::push_lca(enode* a, enode* b) {
enode* lca = find_lca(a, b);
push_to_lca(a, lca);
push_to_lca(b, lca);
}
void egraph::push_todo(enode* n) {
while (n) {
m_todo.push_back(n);
@ -313,7 +314,11 @@ namespace euf {
void egraph::explain_eq(ptr_vector<T>& justifications, enode* a, enode* b, bool comm) {
SASSERT(m_todo.empty());
SASSERT(a->get_root() == b->get_root());
push_lca(a, b);
enode* lca = find_lca(a, b);
push_to_lca(a, lca);
push_to_lca(b, lca);
if (m_used_eq)
m_used_eq(a->get_owner(), b->get_owner(), lca->get_owner());
explain_todo(justifications);
}