mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-06-24 06:43:40 +00:00
Code Activity

activate non-overflow bounds

Browse source 
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2022-12-12 20:11:01 -08:00
parent a5f12e9d57
commit 6c7f556496
2 changed files with 14 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

13
src/math/polysat/umul_ovfl_constraint.cpp
View file

@ -80,6 +80,9 @@ namespace polysat {
if (is_always_true(is_positive, p1, q1)) if (is_always_true(is_positive, p1, q1))
return; return;
if (first)
activate(s, is_positive);
if (try_viable(s, is_positive, p(), q(), p1, q1)) if (try_viable(s, is_positive, p(), q(), p1, q1))
return; return;
@ -91,6 +94,16 @@ namespace polysat {
} }
void umul_ovfl_constraint::activate(solver& s, bool is_positive) {
// TODO - remove to enable
return;
if (!is_positive) {
signed_constraint sc(this, is_positive);
s.add_clause(~sc, s.eq(p()), s.eq(q()), s.ule(p(), p()*q()), false);
s.add_clause(~sc, s.eq(p()), s.eq(q()), s.ule(q(), p()*q()), false);
}
}
/** /**
* if p constant, q, propagate inequality * if p constant, q, propagate inequality
*/ */

1
src/math/polysat/umul_ovfl_constraint.h
View file

@ -30,6 +30,7 @@ namespace polysat {
static lbool eval(pdd const& p, pdd const& q); static lbool eval(pdd const& p, pdd const& q);
bool narrow_bound(solver& s, bool is_positive, pdd const& p0, pdd const& q0, pdd const& p, pdd const& q); bool narrow_bound(solver& s, bool is_positive, pdd const& p0, pdd const& q0, pdd const& p, pdd const& q);
bool try_viable(solver& s, bool is_positive, pdd const& p0, pdd const& q0, pdd const& p, pdd const& q); bool try_viable(solver& s, bool is_positive, pdd const& p0, pdd const& q0, pdd const& p, pdd const& q);
void activate(solver& s, bool is_positive);
public: public:
~umul_ovfl_constraint() override {} ~umul_ovfl_constraint() override {}