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fix regression with mainintaing signs for monotonicity lemmas

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2020-05-16 11:16:39 -07:00
parent cd833e892f
commit d352c61e01
2 changed files with 6 additions and 0 deletions
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4
src/ast/rewriter/bv_rewriter.cpp
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@ -1336,6 +1336,10 @@ br_status bv_rewriter::mk_bv_smod_core(expr * arg1, expr * arg2, bool hi_div0, e
result = mk_numeral(0, bv_size);
return BR_REWRITE2;
}
if (r2.is_pos()) {
}
}
if (hi_div0) {

2
src/math/lp/nla_monotone_lemmas.cpp
View file

@ -53,6 +53,8 @@ void monotone::monotonicity_lemma_gt(const monic& m) {
for (lpvar j : m.vars()) {
auto v = c().val(j);
lemma |= ineq(j, v.is_neg() ? llc::LT : llc::GT, v);
if (v.is_neg())
lemma |= ineq(j, llc::GT, 0);
product *= v;
}
lemma |= ineq(m.var(), product.is_neg() ? llc::GE : llc::LE, product);