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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-09-29 13:27:49 -07:00
parent ee909b6374
commit 5df2715064
10 changed files with 458 additions and 15 deletions
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16
src/sat/smt/array_solver.cpp
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@ -61,6 +61,11 @@ also currently, as a base-line it is eager:
-------------------------------
A = B => forall i . M[i] = B[i]
A hypothetical refinement could use some limited HO pattern unification steps.
For example
lambda x y z . Y z y x = lambda x y z . X x z y
-> Y = lambda x y z . X ....
--*/
#include "ast/ast_ll_pp.h"
@ -191,17 +196,12 @@ namespace array {
push_axiom(congruence_axiom(n1, n2));
}
void solver::tracked_push(euf::enode_vector& v, euf::enode* n) {
v.push_back(n);
ctx.push(push_back_trail<euf::solver, euf::enode*, false>(v));
}
void solver::add_parent_select(theory_var v_child, euf::enode* select) {
SASSERT(a.is_select(select->get_expr()));
SASSERT(m.get_sort(select->get_arg(0)->get_expr()) == m.get_sort(var2expr(v_child)));
v_child = find(v_child);
tracked_push(get_var_data(v_child).m_parent_selects, select);
ctx.push_vec(get_var_data(v_child).m_parent_selects, select);
euf::enode* child = var2enode(v_child);
if (can_beta_reduce(child) && child != select->get_arg(0))
push_axiom(select_axiom(select, child));
@ -212,7 +212,7 @@ namespace array {
auto& d = get_var_data(find(v));
if (should_set_prop_upward(d))
set_prop_upward(d);
tracked_push(d.m_lambdas, lambda);
ctx.push_vec(d.m_lambdas, lambda);
if (should_set_prop_upward(d)) {
set_prop_upward(lambda);
propagate_select_axioms(d, lambda);
@ -222,7 +222,7 @@ namespace array {
void solver::add_parent_lambda(theory_var v_child, euf::enode* lambda) {
SASSERT(can_beta_reduce(lambda));
auto& d = get_var_data(find(v_child));
tracked_push(d.m_parent_lambdas, lambda);
ctx.push_vec(d.m_parent_lambdas, lambda);
if (should_set_prop_upward(d))
propagate_select_axioms(d, lambda);
}