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adjust overflow premises, add stubs for used constraints as premises

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-09-09 16:58:51 +02:00
parent ed60cdc403
commit 697723d53b
3 changed files with 74 additions and 135 deletions
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7
src/math/polysat/saturation.h
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@ -38,8 +38,8 @@ namespace polysat {
class inf_saturate : public inference_engine {
bool find_upper_bound(pvar x, signed_constraint& c, rational& bound);
bool push_omega_viable(conflict_core& core, clause_builder& reason, unsigned level, pdd const& x, pdd const& y);
bool push_omega_mul(conflict_core& core, clause_builder& reason, unsigned level, pdd const& x, pdd const& y);
void push_omega(clause_builder& reason, unsigned level, pdd const& x, pdd const& y);
void push_omega_bisect(clause_builder& reason, unsigned level, pdd const& x, rational x_max, pdd const& y, rational y_max);
signed_constraint ineq(unsigned level, bool strict, pdd const& lhs, pdd const& rhs);
void push_c(conflict_core& core, signed_constraint const& c, clause_builder& reason);
void push_l(conflict_core& core, unsigned level, bool strict, pdd const& lhs, pdd const& rhs, clause_builder& reason);
@ -83,6 +83,9 @@ namespace polysat {
// xy := x * Y
bool is_xY(pvar x, pdd const& xy, pdd& y);
// a * b does not overflow
bool is_non_overflow(pdd const& a, pdd const& b);
public:
bool perform(pvar v, conflict_core& core) override;