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take 1 on flip conditions

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2024-12-31 11:44:38 -08:00
parent a511b8bcf0
commit b415b82625
7 changed files with 71 additions and 35 deletions
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23
src/ast/sls/sls_basic_plugin.cpp
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@ -44,8 +44,17 @@ namespace sls {
void basic_plugin::register_term(expr* e) {
expr* c, * th, * el;
if (m.is_ite(e, c, th, el) && !m.is_bool(e)) {
ctx.add_clause(m.mk_or(mk_not(m, c), m.mk_eq(e, th)));
ctx.add_clause(m.mk_or(c, m.mk_eq(e, el)));
auto eq_th = expr_ref(m.mk_eq(e, th), m);
auto eq_el = expr_ref(m.mk_eq(e, el), m);
ctx.add_clause(m.mk_or(mk_not(m, c), eq_th));
ctx.add_clause(m.mk_or(c, eq_el));
#if 0
auto eq_th_el = expr_ref(m.mk_eq(th, el), m);
verbose_stream() << mk_bounded_pp(eq_th_el, m) << "\n";
ctx.add_clause(m.mk_or(eq_th_el, c, m.mk_not(eq_th)));
ctx.add_clause(m.mk_or(eq_th_el, m.mk_not(c), m.mk_not(eq_el)));
#endif
}
}
@ -178,8 +187,16 @@ namespace sls {
if (m.is_xor(e) && eval_xor(e) == ctx.get_value(e))
return true;
if (m.is_ite(e) && eval_ite(e) == ctx.get_value(e))
if (m.is_ite(e) && !m.is_bool(e)) {
if (eval_ite(e) == ctx.get_value(e))
return true;
if (try_repair(e, 1))
return true;
if (try_repair(e, 2))
return true;
ctx.flip(ctx.atom2bool_var(e->get_arg(0)));
return true;
}
if (m.is_distinct(e) && eval_distinct(e) == ctx.get_value(e))
return true;
unsigned n = e->get_num_args();