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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2023-11-15 17:56:45 -08:00
parent a76aca57f0
commit 7ad8c6a6ce
2 changed files with 9 additions and 5 deletions
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12
src/ast/euf/euf_ac_plugin.cpp
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@ -21,7 +21,7 @@ Completion modulo AC
Notes: Notes:
- Some equalities come from shared terms, so do not. - Some equalities come from shared terms, some do not.
- V2 can use multiplicities of elements to handle larger domains. - V2 can use multiplicities of elements to handle larger domains.
- e.g. 3x + 100000y - e.g. 3x + 100000y
@ -77,7 +77,11 @@ namespace euf {
{} {}
void ac_plugin::register_node(enode* n) { void ac_plugin::register_node(enode* n) {
// no-op if (is_op(n))
return;
for (auto arg : enode_args(n))
if (is_op(arg))
register_shared(arg); // TODO optimization to avoid registering shared terms twice
} }
void ac_plugin::register_shared(enode* n) { void ac_plugin::register_shared(enode* n) {
@ -476,7 +480,7 @@ namespace euf {
for (auto n : m) for (auto n : m)
if (n->root->eqs.size() >= max_use) if (n->root->eqs.size() >= max_use)
max_n = n, max_use = n->root->eqs.size(); max_n = n, max_use = n->root->eqs.size();
// found node that occurs in fewest rhs // found node that occurs in most eqs
VERIFY(max_n); VERIFY(max_n);
m_eq_occurs.reset(); m_eq_occurs.reset();
for (auto n : m) for (auto n : m)
@ -517,7 +521,7 @@ namespace euf {
for (auto n : monomial(eq.l)) for (auto n : monomial(eq.l))
if (n->root->eqs.size() < min_r) if (n->root->eqs.size() < min_r)
min_n = n, min_r = n->root->eqs.size(); min_n = n, min_r = n->root->eqs.size();
// found node that occurs in fewest rhs // found node that occurs in fewest eqs
VERIFY(min_n); VERIFY(min_n);
return min_n->eqs; return min_n->eqs;
} }

2
src/ast/euf/euf_ac_plugin.h
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@ -36,7 +36,7 @@ namespace euf {
class ac_plugin : public plugin { class ac_plugin : public plugin {
// enode structure for AC equivalenes // enode structure for AC equivalences
struct node { struct node {
enode* n; // associated enode enode* n; // associated enode
node* root; // path compressed root node* root; // path compressed root