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fix build, add seq features

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2015-12-13 16:02:17 -08:00
parent 3c50508762
commit 72883df134
10 changed files with 404 additions and 174 deletions
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99
src/ast/rewriter/seq_rewriter.cpp
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@ -520,6 +520,7 @@ br_status seq_rewriter::mk_eq_core(expr * l, expr * r, expr_ref & result) {
bool seq_rewriter::reduce_eq(expr* l, expr* r, expr_ref_vector& lhs, expr_ref_vector& rhs) {
expr* a, *b;
zstring s;
bool change = false;
expr_ref_vector trail(m());
m_lhs.reset();
@ -528,23 +529,55 @@ bool seq_rewriter::reduce_eq(expr* l, expr* r, expr_ref_vector& lhs, expr_ref_ve
m_util.str.get_concat(r, m_rhs);
// solve from back
while (!m_lhs.empty() && !m_rhs.empty()) {
if (m_lhs.back() == m_rhs.back()) {
while (true) {
while (!m_rhs.empty() && m_util.str.is_empty(m_rhs.back())) {
m_rhs.pop_back();
change = true;
}
while (!m_lhs.empty() && m_util.str.is_empty(m_lhs.back())) {
m_lhs.pop_back();
change = true;
}
if (m_lhs.empty() || m_rhs.empty()) {
break;
}
expr* l = m_lhs.back();
expr* r = m_rhs.back();
if (m_util.str.is_unit(r) && m_util.str.is_string(l)) {
std::swap(l, r);
std::swap(m_lhs, m_rhs);
}
if (l == r) {
m_lhs.pop_back();
m_rhs.pop_back();
}
else if(m_util.str.is_unit(m_lhs.back(), a) &&
m_util.str.is_unit(m_rhs.back(), b)) {
else if(m_util.str.is_unit(l, a) &&
m_util.str.is_unit(r, b)) {
lhs.push_back(a);
rhs.push_back(b);
m_lhs.pop_back();
m_rhs.pop_back();
}
else if (!m_rhs.empty() && m_util.str.is_empty(m_rhs.back())) {
m_rhs.pop_back();
}
else if (!m_lhs.empty() && m_util.str.is_empty(m_lhs.back())) {
else if (m_util.str.is_unit(l, a) && m_util.str.is_string(r, s)) {
SASSERT(s.length() > 0);
unsigned ch = s[s.length()-1];
SASSERT(s.num_bits() == m_butil.get_bv_size(a));
expr_ref bv(m());
bv = m_butil.mk_numeral(ch, s.num_bits());
SASSERT(m_butil.is_bv(a));
lhs.push_back(bv);
rhs.push_back(a);
m_lhs.pop_back();
if (s.length() == 1) {
m_rhs.pop_back();
}
else {
expr_ref s2(m_util.str.mk_string(s.extract(0, s.length()-2)), m());
m_rhs[m_rhs.size()-1] = s2;
trail.push_back(s2);
}
}
else {
break;
@ -554,23 +587,55 @@ bool seq_rewriter::reduce_eq(expr* l, expr* r, expr_ref_vector& lhs, expr_ref_ve
// solve from front
unsigned head1 = 0, head2 = 0;
while (head1 < m_lhs.size() && head2 < m_rhs.size()) {
if (m_lhs[head1] == m_rhs[head2]) {
while (true) {
while (head1 < m_lhs.size() && m_util.str.is_empty(m_lhs[head1])) {
++head1;
}
while (head2 < m_rhs.size() && m_util.str.is_empty(m_rhs[head2])) {
++head2;
}
if (head1 == m_lhs.size() || head2 == m_rhs.size()) {
break;
}
SASSERT(head1 < m_lhs.size() && head2 == m_rhs.size());
expr* l = m_lhs[head1];
expr* r = m_rhs[head2];
if (m_util.str.is_unit(r) && m_util.str.is_string(l)) {
std::swap(l, r);
std::swap(m_lhs, m_rhs);
}
if (l == r) {
++head1;
++head2;
}
else if(m_util.str.is_unit(m_lhs[head1], a) &&
m_util.str.is_unit(m_rhs[head2], b)) {
else if(m_util.str.is_unit(l, a) &&
m_util.str.is_unit(r, b)) {
lhs.push_back(a);
rhs.push_back(b);
++head1;
++head2;
}
else if (head1 < m_lhs.size() && m_util.str.is_empty(m_lhs[head1])) {
++head1;
}
else if (head2 < m_rhs.size() && m_util.str.is_empty(m_rhs[head2])) {
++head2;
else if (m_util.str.is_unit(l, a) && m_util.str.is_string(r, s)) {
SASSERT(s.length() > 0);
unsigned ch = s[0];
SASSERT(s.num_bits() == m_butil.get_bv_size(a));
expr_ref bv(m());
bv = m_butil.mk_numeral(ch, s.num_bits());
SASSERT(m_butil.is_bv(a));
lhs.push_back(bv);
rhs.push_back(a);
m_lhs.pop_back();
if (s.length() == 1) {
m_rhs.pop_back();
}
else {
expr_ref s2(m_util.str.mk_string(s.extract(1, s.length()-1)), m());
m_rhs[m_rhs.size()-1] = s2;
trail.push_back(s2);
}
}
else {
break;