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fixing #4670 (#4682)

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* fixing #4670

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* init

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* arrays

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* arrays

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* arrays

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

* na

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
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Nikolaj Bjorner 2020-09-10 04:35:11 -07:00 • committed by GitHub
parent ee00542e76
commit cfa7c733db
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48 changed files with 1591 additions and 359 deletions
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77
src/sat/smt/array_model.cpp Normal file
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/*++
Copyright (c) 2020 Microsoft Corporation
Module Name:
array_model.cpp
Abstract:
Theory plugin for arrays
Author:
Nikolaj Bjorner (nbjorner) 2020-09-08
--*/
#include "ast/ast_ll_pp.h"
#include "model/array_factory.h"
#include "sat/smt/array_solver.h"
#include "sat/smt/euf_solver.h"
namespace array {
void solver::add_dep(euf::enode* n, top_sort<euf::enode>& dep) {
if (!a.is_array(n->get_expr())) {
dep.insert(n, nullptr);
return;
}
for (euf::enode* p : euf::enode_parents(n)) {
if (!a.is_select(p->get_expr()))
continue;
dep.add(n, p);
for (unsigned i = 1; i < p->num_args(); ++i)
dep.add(n, p->get_arg(i));
}
for (euf::enode* k : euf::enode_class(n))
if (a.is_const(k->get_expr()))
dep.add(n, k);
else if (a.is_default(k->get_expr()))
dep.add(n, k);
}
void solver::add_value(euf::enode* n, model& mdl, expr_ref_vector& values) {
SASSERT(a.is_array(n->get_expr()));
ptr_vector<expr> args;
sort* srt = m.get_sort(n->get_expr());
unsigned arity = get_array_arity(srt);
func_decl * f = mk_aux_decl_for_array_sort(m, srt);
func_interp * fi = alloc(func_interp, m, arity);
mdl.register_decl(f, fi);
for (euf::enode* p : euf::enode_parents(n)) {
if (!a.is_select(p->get_expr()))
continue;
args.reset();
for (unsigned i = 1; i < p->num_args(); ++i)
args.push_back(values.get(p->get_arg(i)->get_root_id()));
expr* value = values.get(p->get_root_id());
fi->insert_entry(args.c_ptr(), value);
}
if (!fi->get_else())
for (euf::enode* k : euf::enode_class(n))
if (a.is_const(k->get_expr()))
fi->set_else(k->get_arg(0)->get_root()->get_expr());
if (!fi->get_else())
for (euf::enode* k : euf::enode_parents(n))
if (a.is_default(k->get_expr()))
fi->set_else(k->get_root()->get_expr());
parameter p(f);
values.set(n->get_root_id(), m.mk_app(get_id(), OP_AS_ARRAY, 1, &p));
}
}