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derived order lemma

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Signed-off-by: Lev <levnach@hotmail.com>
This commit is contained in:
Lev 2019-01-31 11:31:23 -08:00 • committed by Lev Nachmanson
parent 62772468b5
commit ff1bfdbfc6
1 changed files with 20 additions and 4 deletions
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24
src/util/lp/nla_solver.cpp
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@ -628,6 +628,10 @@ struct solver::imp {
}
unsigned_vector eq_vars(lpvar j) const {
TRACE("nla_solver_eq", tout << "j = "; print_var(j, tout); tout << "eqs = ";
for(auto jj : m_vars_equivalence.eq_vars(j)) {
print_var(jj, tout);
});
return m_vars_equivalence.eq_vars(j);
}
@ -1338,9 +1342,14 @@ struct solver::imp {
explain(c, current_expl());
explain(d, current_expl()); // todo: double check that these explanations are enough, too much!?
}
TRACE("nla_solver", print_lemma(current_lemma(), tout););
TRACE("nla_solver", print_lemma_and_expl(tout););
}
void print_lemma_and_expl(std::ostream& out) {
print_lemma(current_lemma(), out);
print_explanation(current_expl(), out);
}
bool get_cd_signs_for_ol(const rational& c, const rational& d, int& c_sign, int & d_sign) const {
if (c.is_zero() || d.is_zero())
return false;
@ -1471,12 +1480,19 @@ struct solver::imp {
std::unordered_set<lpvar> found_vars;
std::unordered_set<unsigned> found_rm;
TRACE("nla_solver", tout << "c = "; print_factor_with_vars(c, tout););
for (lpvar i : m_vars_equivalence.get_vars_with_the_same_abs_val(vvr(c))) {
maybe_add_a_factor(i, c, found_vars, found_rm, r);
if (model_based) {
for (lpvar i : m_vars_equivalence.get_vars_with_the_same_abs_val(vvr(c))) {
maybe_add_a_factor(i, c, found_vars, found_rm, r);
}
} else {
for (lpvar i : eq_vars(var(c))) {
maybe_add_a_factor(i, c, found_vars, found_rm, r);
}
}
return r;
}
bool order_lemma_on_ad(const rooted_mon& rm, const factorization& ac, unsigned k, bool model_based, const factor & d) {
TRACE("nla_solver", tout << "d = "; print_factor_with_vars(d, tout); );
SASSERT(abs(vvr(d)) == abs(vvr(ac[k])));
@ -2898,7 +2914,7 @@ void solver::test_tangent_lemma_equiv() {
lpvar kj = s.add_term(t.coeffs_as_vector());
s.add_var_bound(kj, llc::LE, rational(0));
s.add_var_bound(kj, llc::GE, rational(0));
s.set_column_value(lp_a, - s.get_column_value(lp_k));
reslimit l;
params_ref p;
solver nla(s, l, p);