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umul 2

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This commit is contained in:
Jakob Rath 2022-07-21 12:38:00 +02:00
parent d4592f2abf
commit 48c6bea331
8 changed files with 48 additions and 50 deletions
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14
src/math/polysat/forbidden_intervals.cpp
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@ -17,7 +17,7 @@ Author:
#include "math/polysat/interval.h"
#include "math/polysat/solver.h"
#include "math/polysat/log.h"
#include "math/polysat/mul_ovfl_constraint.h"
#include "math/polysat/umul_ovfl_constraint.h"
namespace polysat {
@ -31,14 +31,12 @@ namespace polysat {
bool forbidden_intervals::get_interval(signed_constraint const& c, pvar v, fi_record& fi) {
if (c->is_ule())
return get_interval_ule(c, v, fi);
if (c->is_mul_ovfl())
return get_interval_mul_ovfl(c, v, fi);
if (c->is_umul_ovfl())
return get_interval_umul_ovfl(c, v, fi);
return false;
}
bool forbidden_intervals::get_interval_mul_ovfl(signed_constraint const& c, pvar v, fi_record& fi) {
bool forbidden_intervals::get_interval_umul_ovfl(signed_constraint const& c, pvar v, fi_record& fi) {
backtrack _backtrack(fi.side_cond);
@ -48,8 +46,8 @@ namespace polysat {
// eval(lhs) = a1*v + eval(e1) = a1*v + b1
// eval(rhs) = a2*v + eval(e2) = a2*v + b2
// We keep the e1, e2 around in case we need side conditions such as e1=b1, e2=b2.
auto [ok1, a1, e1, b1] = linear_decompose(v, c->to_mul_ovfl().p(), fi.side_cond);
auto [ok2, a2, e2, b2] = linear_decompose(v, c->to_mul_ovfl().q(), fi.side_cond);
auto [ok1, a1, e1, b1] = linear_decompose(v, c->to_umul_ovfl().p(), fi.side_cond);
auto [ok2, a2, e2, b2] = linear_decompose(v, c->to_umul_ovfl().q(), fi.side_cond);
auto& m = e1.manager();
rational bound = m.max_value();