mirrors/z3
3
0
Fork 0
mirror of https://github.com/Z3Prover/z3 synced 2025-04-05 17:14:07 +00:00
Code Activity

order lemmas on also rationals

Browse source
This commit is contained in:
Nikolaj Bjorner 2020-05-15 10:11:52 -07:00
parent 146fd77e0f
commit 0c91109577
1 changed files with 6 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
src/math/lp/nla_order_lemmas.cpp
View file

@ -40,8 +40,6 @@ void order::order_lemma() {
void order::order_lemma_on_monic(const monic& m) {
TRACE("nla_solver_details",
tout << "m = " << pp_mon(c(), m););
if (c().has_real(m))
return;
for (auto ac : factorization_factory_imp(m, _())) {
if (ac.size() != 2)
continue;
@ -82,6 +80,8 @@ void order::order_lemma_on_binomial(const monic& ac) {
*/
void order::order_lemma_on_binomial_sign(const monic& xy, lpvar x, lpvar y, int sign) {
if (!c().var_is_int(x) && val(x).is_big())
return;
SASSERT(!_().mon_has_zero(xy.vars()));
int sy = rat_sign(val(y));
new_lemma lemma(c(), __FUNCTION__);
@ -326,6 +326,8 @@ bool order::order_lemma_on_ac_and_bc_and_factors(const monic& ac,
lemma b != val(b) || sign 0 m <= a*val(b)
*/
void order::order_lemma_on_ab_gt(new_lemma& lemma, const monic& m, const rational& sign, lpvar a, lpvar b) {
if (!c().var_is_int(b) && val(b).is_big())
return;
SASSERT(sign * var_val(m) > val(a) * val(b));
// negate b == val(b)
lemma |= ineq(b, llc::NE, val(b));
@ -337,6 +339,8 @@ void order::order_lemma_on_ab_gt(new_lemma& lemma, const monic& m, const rationa
lemma b != val(b) || sign*m >= a*val(b)
*/
void order::order_lemma_on_ab_lt(new_lemma& lemma, const monic& m, const rational& sign, lpvar a, lpvar b) {
if (!c().var_is_int(b) && val(b).is_big())
return;
TRACE("nla_solver", tout << "sign = " << sign << ", m = "; c().print_monic(m, tout) << ", a = "; c().print_var(a, tout) <<
", b = "; c().print_var(b, tout) << "\n";);
SASSERT(sign * var_val(m) < val(a) * val(b));