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reimplement lemmas on rooted monomials

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Signed-off-by: Lev <levnach@hotmail.com>
This commit is contained in:
Lev 2018-11-26 15:54:52 -08:00 • committed by Lev Nachmanson
parent cc6dc9e7d4
commit 7e03e900b8
1 changed files with 11 additions and 21 deletions
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32
src/util/lp/nla_solver.cpp
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@ -653,18 +653,19 @@ struct solver::imp {
// use the fact
// 1 * 1 ... * 1 * x * 1 ... * 1 = x
bool basic_lemma_for_mon_neutral_from_factors_to_monomial(const rooted_mon& rm, const factorization& f) {
int sign = 1;
rational sign = rm.m_orig.m_sign;
lpvar not_one_j = -1;
for (lpvar j : f){
if (vvr(j) == rational(1)) {
continue;
}
if (vvr(j) == -rational(1)) {
sign = - sign;
continue;
}
if (not_one_j == static_cast<lpvar>(-1)) {
not_one_j = j;
continue;
@ -673,25 +674,10 @@ struct solver::imp {
// if we are here then there are at least two factors with values different from one and minus one: cannot create the lemma
return false;
}
/*
expl_set e;
add_explanation_of_factorization_and_set_explanation(rm, f, e);
if (not_one_j == static_cast<lpvar>(-1)) {
// we can derive that the value of the monomial is equal to sign
for (lpvar j : f){
if (vvr(j) == rational(1)) {
mk_ineq(j, lp::lconstraint_kind::NE, rational(1));
} else if (vvr(j) == -rational(1)) {
mk_ineq(j, lp::lconstraint_kind::NE, -rational(1));
}
}
mk_ineq(m_monomials[i_mon].var(), lp::lconstraint_kind::EQ, rational(sign));
TRACE("nla_solver", print_lemma(tout););
return true;
}
for (lpvar j : f){
if (vvr(j) == rational(1)) {
mk_ineq(j, lp::lconstraint_kind::NE, rational(1));
@ -699,10 +685,14 @@ struct solver::imp {
mk_ineq(j, lp::lconstraint_kind::NE, -rational(1));
}
}
mk_ineq(m_monomials[i_mon].var(), -rational(sign), not_one_j,lp::lconstraint_kind::EQ);
if (not_one_j == static_cast<lpvar>(-1)) {
mk_ineq(m_monomials[rm.orig_index()].var(), lp::lconstraint_kind::EQ, rational(sign));
} else {
mk_ineq(m_monomials[rm.orig_index()].var(), -rational(sign), not_one_j, lp::lconstraint_kind::EQ);
}
TRACE("nla_solver", print_lemma(tout););
return true;*/
return false;
return true;
}
bool basic_lemma_for_mon_neutral(const rooted_mon& rm, const factorization& factorization) {