mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-05-12 02:04:43 +00:00
Code Activity

na

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-06-20 12:38:20 -07:00
parent 4fad0385de
commit 19099244c4
5 changed files with 49 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

15
src/math/polysat/ule_constraint.cpp
View file

@ -75,11 +75,18 @@ namespace polysat {
}
if (v != null_var) {
bddv const& x = s.var2bits(v).var();
bddv l = a * x + b;
bddv r = c * x + d;
bdd xs = is_positive() ? (l <= r) : (l > r);
s.push_cjust(v, this);
s.intersect_viable(v, xs);
// hacky special case
if (a == 1 && b == 0 && c == 0 && d == 0)
// x <= 0
s.intersect_viable(v, is_positive() ? x.all0() : !x.all0());
else {
IF_VERBOSE(10, verbose_stream() << a << "*x + " << b << (is_positive() ? " <= " : " > ") << c << "*x + " << d << "\n");
bddv l = a * x + b;
bddv r = c * x + d;
bdd xs = is_positive() ? (l <= r) : (l > r);
s.intersect_viable(v, xs);
}
rational val;
if (s.find_viable(v, val) == dd::find_t::singleton) {