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remove iff

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-05-16 18:35:38 -07:00 • committed by Arie Gurfinkel
parent ecf15ab07d
commit ff0f257102
47 changed files with 199 additions and 264 deletions
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16
src/smt/smt_internalizer.cpp
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@ -34,9 +34,10 @@ namespace smt {
switch (to_app(n)->get_decl_kind()) {
case OP_AND:
case OP_OR:
case OP_IFF:
case OP_ITE:
return true;
case OP_EQ:
return m.is_bool(to_app(n)->get_arg(0));
default:
return false;
}
@ -229,7 +230,7 @@ namespace smt {
add_or_rel_watches(to_app(n));
break;
}
case OP_IFF: {
case OP_EQ: {
expr * lhs = to_app(n)->get_arg(0);
expr * rhs = to_app(n)->get_arg(1);
internalize(lhs, true);
@ -381,7 +382,7 @@ namespace smt {
return;
}
if (m_manager.is_eq(n))
if (m_manager.is_eq(n) && !m_manager.is_iff(n))
internalize_eq(to_app(n), gate_ctx);
else if (m_manager.is_distinct(n))
internalize_distinct(to_app(n), gate_ctx);
@ -538,9 +539,7 @@ namespace smt {
bool _is_gate = is_gate(m_manager, n) || m_manager.is_not(n);
// process args
unsigned num = n->get_num_args();
for (unsigned i = 0; i < num; i++) {
expr * arg = n->get_arg(i);
for (expr * arg : *n) {
internalize(arg, _is_gate);
}
@ -596,8 +595,9 @@ namespace smt {
mk_or_cnstr(to_app(n));
add_or_rel_watches(to_app(n));
break;
case OP_IFF:
mk_iff_cnstr(to_app(n));
case OP_EQ:
if (m_manager.is_iff(n))
mk_iff_cnstr(to_app(n));
break;
case OP_ITE:
mk_ite_cnstr(to_app(n));