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integrate lambda expressions

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2018-06-26 07:23:04 -07:00
parent bf4edef761
commit 520ce9a5ee
139 changed files with 2243 additions and 1506 deletions
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73
src/ast/rewriter/bool_rewriter.cpp
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@ -588,58 +588,39 @@ br_status bool_rewriter::try_ite_value(app * ite, app * val, expr_ref & result)
VERIFY(m().is_ite(ite, cond, t, e));
SASSERT(m().is_value(val));
if (m().is_value(t) && m().is_value(e)) {
if (t != val && e != val) {
TRACE("try_ite_value", tout << mk_ismt2_pp(t, m()) << " " << mk_ismt2_pp(e, m()) << " " << mk_ismt2_pp(val, m()) << "\n";
tout << t << " " << e << " " << val << "\n";);
result = m().mk_false();
}
else if (t == val && e == val) {
if (m().are_distinct(val, e)) {
result = m().mk_and(m().mk_eq(t, val), cond);
return BR_REWRITE2;
}
if (m().are_distinct(val, t)) {
result = m().mk_and(m().mk_eq(e, val), m().mk_not(cond));
return BR_REWRITE2;
}
if (m().are_equal(val, t)) {
if (m().are_equal(val, e)) {
result = m().mk_true();
}
else if (t == val) {
result = cond;
return BR_DONE;
}
else {
SASSERT(e == val);
mk_not(cond, result);
result = m().mk_or(m().mk_eq(e, val), cond);
}
return BR_DONE;
return BR_REWRITE2;
}
if (m_ite_extra_rules) {
if (m().is_value(t)) {
if (val == t) {
result = m().mk_or(cond, m().mk_eq(val, e));
}
else {
mk_not(cond, result);
result = m().mk_and(result, m().mk_eq(val, e));
}
return BR_REWRITE2;
}
if (m().is_value(e)) {
if (val == e) {
mk_not(cond, result);
result = m().mk_or(result, m().mk_eq(val, t));
}
else {
result = m().mk_and(cond, m().mk_eq(val, t));
}
return BR_REWRITE2;
}
if (m().are_equal(val, e)) {
result = m().mk_or(m().mk_eq(t, val), m().mk_not(cond));
return BR_REWRITE2;
}
{
expr* cond2, *t2, *e2;
if (m().is_ite(t, cond2, t2, e2) && m().is_value(t2) && m().is_value(e2)) {
try_ite_value(to_app(t), val, result);
result = m().mk_ite(cond, result, m().mk_eq(e, val));
return BR_REWRITE2;
}
if (m().is_ite(e, cond2, t2, e2) && m().is_value(t2) && m().is_value(e2)) {
try_ite_value(to_app(e), val, result);
result = m().mk_ite(cond, m().mk_eq(t, val), result);
return BR_REWRITE2;
}
expr* cond2 = nullptr, *t2 = nullptr, *e2 = nullptr;
if (m().is_ite(t, cond2, t2, e2) && m().is_value(t2) && m().is_value(e2)) {
try_ite_value(to_app(t), val, result);
result = m().mk_ite(cond, result, m().mk_eq(e, val));
return BR_REWRITE2;
}
if (m().is_ite(e, cond2, t2, e2) && m().is_value(t2) && m().is_value(e2)) {
try_ite_value(to_app(e), val, result);
result = m().mk_ite(cond, m().mk_eq(t, val), result);
return BR_REWRITE2;
}
return BR_FAILED;