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create helper functions

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2018-10-11 21:05:49 -07:00
parent be0129407c
commit 9db5b3d658
1 changed files with 20 additions and 17 deletions
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37
src/util/lp/nla_solver.cpp
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@ -369,6 +369,10 @@ struct solver::imp {
} }
} }
void ineq_j_is_equal_to_zero_add_to_lemma(lpvar j) {
m_lemma->push_back(ineq_j_is_equal_to_zero(j));
}
ineq ineq_j_is_equal_to_zero(lpvar j) const { ineq ineq_j_is_equal_to_zero(lpvar j) const {
lp::lar_term t; lp::lar_term t;
t.add_coeff_var(rational(1), j); t.add_coeff_var(rational(1), j);
@ -376,6 +380,17 @@ struct solver::imp {
return i; return i;
} }
void ineq_j_is_nequal_to_zero_add_to_lemma(lpvar j) {
m_lemma->push_back(ineq_j_is_nequal_to_zero(j));
}
ineq ineq_j_is_nequal_to_zero(lpvar j) const {
lp::lar_term t;
t.add_coeff_var(rational(1), j);
ineq i(lp::lconstraint_kind::NE, t, rational::zero());
return i;
}
bool var_is_fixed_to_zero(lpvar j) const { bool var_is_fixed_to_zero(lpvar j) const {
return return
m_lar_solver.column_has_upper_bound(j) && m_lar_solver.column_has_upper_bound(j) &&
@ -953,18 +968,11 @@ struct solver::imp {
lpvar mon_var = m_monomials[i_mon].var(); lpvar mon_var = m_monomials[i_mon].var();
if (!vvr(mon_var).is_zero() ) if (!vvr(mon_var).is_zero() )
return false; return false;
for (lpvar j : f) {
if (vvr(j).is_zero())
return false;
}
lp::lar_term t;
t.add_coeff_var(mon_var);
SASSERT(m_lemma->empty()); SASSERT(m_lemma->empty());
m_lemma->push_back(ineq(lp::lconstraint_kind::NE, t, rational::zero())); ineq_j_is_nequal_to_zero_add_to_lemma(mon_var);
for (lpvar j : f) { for (lpvar j : f) {
t.clear(); m_lemma->push_back(ineq_j_is_equal_to_zero(j));
t.add_coeff_var(rational::one(), j);
m_lemma->push_back(ineq(lp::lconstraint_kind::EQ, t, rational::zero()));
} }
expl_set e; expl_set e;
add_explanation_of_factorization(i_mon, f, e); add_explanation_of_factorization(i_mon, f, e);
@ -1000,13 +1008,8 @@ struct solver::imp {
return false; return false;
} }
lp::lar_term t; ineq_j_is_nequal_to_zero_add_to_lemma(zero_j);
t.add_coeff_var(zero_j); ineq_j_is_equal_to_zero_add_to_lemma(m_monomials[i_mon].var());
SASSERT(m_lemma->empty());
m_lemma->push_back(ineq(lp::lconstraint_kind::NE, t, rational::zero()));
t.clear();
t.add_coeff_var(m_monomials[i_mon].var());
m_lemma->push_back(ineq(lp::lconstraint_kind::EQ, t, rational::zero()));
expl_set e; expl_set e;
add_explanation_of_factorization(i_mon, f, e); add_explanation_of_factorization(i_mon, f, e);