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fix #4260

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-05-09 18:13:12 -07:00
parent fdc87f286f
commit f044071f5e
2 changed files with 20 additions and 9 deletions
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2
src/ast/rewriter/recfun_rewriter.cpp
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@ -21,7 +21,7 @@ Author:
#include "ast/rewriter/var_subst.h"
br_status recfun_rewriter::mk_app_core(func_decl * f, unsigned num_args, expr * const * args, expr_ref & result) {
if (m_rec.is_defined(f)) {
if (m_rec.is_defined(f) && num_args > 0) {
for (unsigned i = 0; i < num_args; ++i) {
if (!m.is_value(args[i]))
return BR_FAILED;

27
src/smt/smt_conflict_resolution.cpp
View file

@ -783,18 +783,25 @@ namespace smt {
if (!pr)
return nullptr;
SASSERT(m.has_fact(pr));
expr* f1 = nullptr, *f2 = nullptr;
app * fact = to_app(m.get_fact(pr));
app * n1_owner = n1->get_owner();
app * n2_owner = n2->get_owner();
bool is_eq = m.is_eq(fact);
if (!is_eq || (fact->get_arg(0) != n2_owner && fact->get_arg(1) != n2_owner)) {
bool is_eq = m.is_eq(fact, f1, f2);
if (is_eq && is_quantifier(f1)) {
f1 = m_ctx.get_enode(f1)->get_owner();
}
if (is_eq && is_quantifier(f2)) {
f2 = m_ctx.get_enode(f2)->get_owner();
}
if (!is_eq || (f1 != n2_owner && f2 != n2_owner)) {
CTRACE("norm_eq_proof_bug", !m_ctx.is_true(n2) && !m_ctx.is_false(n2),
tout << "n1: #" << n1->get_owner_id() << ", n2: #" << n2->get_owner_id() << "\n";
if (fact->get_num_args() == 2) {
tout << "fact(0): #" << fact->get_arg(0)->get_id() << ", fact(1): #" << fact->get_arg(1)->get_id() << "\n";
tout << "fact(0): #" << f1->get_id() << ", fact(1): #" << f2->get_id() << "\n";
}
tout << mk_bounded_pp(n1->get_owner(), m, 10) << "\n";
tout << mk_bounded_pp(n2->get_owner(), m, 10) << "\n";
tout << mk_bounded_pp(n1_owner, m, 10) << "\n";
tout << mk_bounded_pp(n2_owner, m, 10) << "\n";
tout << mk_bounded_pp(fact, m, 10) << "\n";
tout << mk_ll_pp(pr, m, true, false););
SASSERT(m_ctx.is_true(n2) || m_ctx.is_false(n2));
@ -807,12 +814,16 @@ namespace smt {
return pr;
}
TRACE("norm_eq_proof",
tout << mk_bounded_pp(pr, m, 4) << "\n";
tout << mk_bounded_pp(n1_owner, m) << "\n";
tout << mk_bounded_pp(n2_owner, m) << "\n";
tout << mk_bounded_pp(f1, m) << "\n";
tout << mk_bounded_pp(f2, m) << "\n";
tout << "#" << n1->get_owner_id() << " = #" << n2->get_owner_id() << "\n";
tout << mk_ll_pp(pr, m, true, false););
SASSERT(m.is_eq(fact));
SASSERT((fact->get_arg(0) == n1->get_owner() && fact->get_arg(1) == n2->get_owner()) ||
(fact->get_arg(1) == n1->get_owner() && fact->get_arg(0) == n2->get_owner()));
if (fact->get_arg(0) == n1_owner && fact->get_arg(1) == n2_owner)
SASSERT((f1 == n1_owner && f2 == n2_owner) || (f2 == n1_owner && f1 == n2_owner));
if (f1 == n1_owner && f2 == n2_owner)
return pr;
pr = m.mk_symmetry(pr);
m_new_proofs.push_back(pr);