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pb/car constraints

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2013-11-07 00:53:08 -08:00
parent 55e91c099f
commit 3ee8c3efb5
6 changed files with 494 additions and 298 deletions
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50
src/tactic/arith/lia2card_tactic.cpp
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@ -175,54 +175,48 @@ class lia2card_tactic : public tactic {
if (a.is_le(fml, x, y) || a.is_ge(fml, y, x)) {
if (is_01var(x) && a.is_numeral(y, n)) {
sub.insert(fml, mk_le(x, n));
return;
}
if (is_01var(y) && a.is_numeral(x, n)) {
else if (is_01var(y) && a.is_numeral(x, n)) {
sub.insert(fml, mk_ge(y, n));
return;
}
if (is_add(x, args) && is_unsigned(y, k)) { // x <= k
else if (is_add(x, args) && is_unsigned(y, k)) { // x <= k
sub.insert(fml, m_card.mk_at_most_k(args.size(), args.c_ptr(), k));
return;
}
if (is_add(y, args) && is_unsigned(x, k)) { // k <= y <=> not (y <= k-1)
else if (is_add(y, args) && is_unsigned(x, k)) { // k <= y <=> not (y <= k-1)
if (k == 0)
sub.insert(fml, m.mk_true());
else
sub.insert(fml, m.mk_not(m_card.mk_at_most_k(args.size(), args.c_ptr(), k-1)));
return;
}
UNREACHABLE();
else {
UNREACHABLE();
}
}
if (a.is_lt(fml, x, y) || a.is_gt(fml, y, x)) {
else if (a.is_lt(fml, x, y) || a.is_gt(fml, y, x)) {
if (is_01var(x) && a.is_numeral(y, n)) {
sub.insert(fml, mk_le(x, n-rational(1)));
return;
}
if (is_01var(y) && a.is_numeral(x, n)) {
else if (is_01var(y) && a.is_numeral(x, n)) {
sub.insert(fml, mk_ge(y, n+rational(1)));
return;
}
if (is_add(x, args) && is_unsigned(y, k)) { // x < k
else if (is_add(x, args) && is_unsigned(y, k)) { // x < k
if (k == 0)
sub.insert(fml, m.mk_false());
else
sub.insert(fml, m_card.mk_at_most_k(args.size(), args.c_ptr(), k-1));
return;
}
if (is_add(y, args) && is_unsigned(x, k)) { // k < y <=> not (y <= k)
}
else if (is_add(y, args) && is_unsigned(x, k)) { // k < y <=> not (y <= k)
sub.insert(fml, m.mk_not(m_card.mk_at_most_k(args.size(), args.c_ptr(), k)));
return;
}
UNREACHABLE();
else {
UNREACHABLE();
}
}
if (m.is_eq(fml, x, y)) {
else if (m.is_eq(fml, x, y)) {
if (!is_01var(x)) {
std::swap(x, y);
}
if (is_01var(x) && a.is_numeral(y, n)) {
else if (is_01var(x) && a.is_numeral(y, n)) {
if (n.is_one()) {
sub.insert(fml, mk_01(x));
}
@ -232,19 +226,21 @@ class lia2card_tactic : public tactic {
else {
sub.insert(fml, m.mk_false());
}
return;
}
UNREACHABLE();
else {
UNREACHABLE();
}
}
if (is_sum(fml)) {
else if (is_sum(fml)) {
SASSERT(m_uses.contains(fml));
ptr_vector<expr> const& u = m_uses.find(fml);
for (unsigned i = 0; i < u.size(); ++i) {
convert_01(sub, u[i]);
}
return;
}
UNREACHABLE();
else {
UNREACHABLE();
}
}
expr_ref mk_01(expr* x) {