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register auxiliary constants from projection operation

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-08-20 08:51:24 -07:00
parent 112fa16bc0
commit 276fdd0e97
8 changed files with 68 additions and 86 deletions
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10
src/ast/rewriter/seq_rewriter.cpp
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@ -864,11 +864,11 @@ br_status seq_rewriter::mk_seq_prefix(expr* a, expr* b, expr_ref& result) {
expr_ref_vector as(m()), bs(m());
if (a1 != b1 && isc1 && isc2) {
TRACE("seq", tout << s1 << " " << s2 << "\n";);
if (s1.length() <= s2.length()) {
if (s1.prefixof(s2)) {
if (a == a1) {
result = m().mk_true();
TRACE("seq", tout << s1 << " " << s2 << " " << result << "\n";);
return BR_DONE;
}
m_util.str.get_concat(a, as);
@ -878,10 +878,12 @@ br_status seq_rewriter::mk_seq_prefix(expr* a, expr* b, expr_ref& result) {
bs[0] = m_util.str.mk_string(s2);
result = m_util.str.mk_prefix(m_util.str.mk_concat(as.size()-1, as.c_ptr()+1),
m_util.str.mk_concat(bs.size(), bs.c_ptr()));
TRACE("seq", tout << s1 << " " << s2 << " " << result << "\n";);
return BR_REWRITE_FULL;
}
else {
result = m().mk_false();
TRACE("seq", tout << s1 << " " << s2 << " " << result << "\n";);
return BR_DONE;
}
}
@ -889,6 +891,7 @@ br_status seq_rewriter::mk_seq_prefix(expr* a, expr* b, expr_ref& result) {
if (s2.prefixof(s1)) {
if (b == b1) {
result = m().mk_false();
TRACE("seq", tout << s1 << " " << s2 << " " << result << "\n";);
return BR_DONE;
}
m_util.str.get_concat(a, as);
@ -898,10 +901,12 @@ br_status seq_rewriter::mk_seq_prefix(expr* a, expr* b, expr_ref& result) {
as[0] = m_util.str.mk_string(s1);
result = m_util.str.mk_prefix(m_util.str.mk_concat(as.size(), as.c_ptr()),
m_util.str.mk_concat(bs.size()-1, bs.c_ptr()+1));
TRACE("seq", tout << s1 << " " << s2 << " " << result << "\n";);
return BR_REWRITE_FULL;
}
else {
result = m().mk_false();
TRACE("seq", tout << s1 << " " << s2 << " " << result << "\n";);
return BR_DONE;
}
}
@ -930,9 +935,6 @@ br_status seq_rewriter::mk_seq_prefix(expr* a, expr* b, expr_ref& result) {
if (i == as.size()) {
result = mk_and(eqs);
TRACE("seq", tout << result << "\n";);
if (m().is_true(result)) {
return BR_DONE;
}
return BR_REWRITE3;
}
SASSERT(i < as.size());