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Fix issue https://z3.codeplex.com/workitem/37

Browse source 
Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
This commit is contained in:
Leonardo de Moura 2013-06-06 18:29:29 -07:00
parent f4f1c63abb
commit 2b59f2ecc2
1 changed files with 5 additions and 3 deletions
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8
src/tactic/core/ctx_simplify_tactic.cpp
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@ -21,7 +21,7 @@ Notes:
#include"goal_num_occurs.h"
#include"cooperate.h"
#include"ast_ll_pp.h"
#include"ast_smt2_pp.h"
#include"ast_pp.h"
struct ctx_simplify_tactic::imp {
struct cached_result {
@ -105,6 +105,7 @@ struct ctx_simplify_tactic::imp {
}
bool shared(expr * t) const {
TRACE("ctx_simplify_tactic_bug", tout << mk_pp(t, m) << "\n";);
return t->get_ref_count() > 1 && m_occs.get_num_occs(t) > 1;
}
@ -242,12 +243,13 @@ struct ctx_simplify_tactic::imp {
}
void assert_expr(expr * t, bool sign) {
expr * p = t;
if (m.is_not(t)) {
t = to_app(t)->get_arg(0);
sign = !sign;
}
bool mk_scope = true;
if (shared(t)) {
if (shared(t) || shared(p)) {
push();
mk_scope = false;
assert_eq_core(t, sign ? m.mk_false() : m.mk_true());
@ -457,7 +459,7 @@ struct ctx_simplify_tactic::imp {
if (visit.is_marked(s)) {
continue;
}
visit.mark(s, true);
visit.mark(s, true);
++sz;
for (unsigned i = 0; is_app(s) && i < to_app(s)->get_num_args(); ++i) {
todo.push_back(to_app(s)->get_arg(i));