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tangent lemma passes first tests

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Signed-off-by: Lev <levnach@hotmail.com>
This commit is contained in:
Lev 2019-01-23 16:06:55 -08:00 committed by Lev Nachmanson
parent 4886acfae5
commit 9f51d91acf
1 changed files with 18 additions and 13 deletions
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31
src/util/lp/nla_solver.cpp
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@ -547,7 +547,7 @@ struct solver::imp {
// the value of the i-th monomial has to be equal to the value of the k-th monomial modulo sign
// but it is not the case in the model
void generate_sign_lemma(const vector<rational>& abs_vals, const monomial& m, const monomial& n, const rational& sign) {
SASSERT(m_lemma_vec->back().empty());
add_empty_lemma_and_explanation();
TRACE("nla_solver",
tout << "m = "; print_monomial_with_vars(m, tout);
tout << "n = "; print_monomial_with_vars(n, tout);
@ -829,8 +829,8 @@ struct solver::imp {
return false;
}
}
SASSERT(current_lemma().empty());
add_empty_lemma_and_explanation();
mk_ineq(var(rm), llc::NE, current_lemma());
for (auto j : f) {
@ -868,7 +868,7 @@ struct solver::imp {
if (zero_j == -1) {
return false;
}
add_empty_lemma_and_explanation();
mk_ineq(zero_j, llc::NE, current_lemma());
mk_ineq(var(rm), llc::EQ, current_lemma());
@ -915,6 +915,7 @@ struct solver::imp {
return false;
}
add_empty_lemma_and_explanation();
// mon_var = 0
mk_ineq(mon_var, llc::EQ, current_lemma());
@ -961,7 +962,8 @@ 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;
}
add_empty_lemma_and_explanation();
explain(rm, current_expl());
for (auto j : f){
@ -1004,6 +1006,7 @@ struct solver::imp {
void generate_pl(const rooted_mon& rm, const factorization& fc, int factor_index) {
TRACE("nla_solver", tout << "rm = "; print_rooted_monomial_with_vars(rm, tout););
add_empty_lemma_and_explanation();
int fi = 0;
for (factor f : fc) {
if (fi++ != factor_index) {
@ -1352,6 +1355,7 @@ struct solver::imp {
int d_sign,
const factor& d,
llc ab_cmp) {
add_empty_lemma_and_explanation();
mk_ineq(rational(c_sign) * flip_sign(c), var(c), llc::LE, current_lemma());
negate_factor_equality(c, d);
negate_factor_relation(rational(c_sign), a, rational(d_sign), b);
@ -1700,6 +1704,7 @@ struct solver::imp {
void generate_monl_strict(const rooted_mon& a,
const rooted_mon& b,
unsigned strict) {
add_empty_lemma_and_explanation();
auto akey = get_sorted_key_with_vars(a);
auto bkey = get_sorted_key_with_vars(b);
SASSERT(akey.size() == bkey.size());
@ -1889,9 +1894,8 @@ struct solver::imp {
explain(rm, exp);
explain(bf.m_x, exp);
explain(bf.m_y, exp);
m_expl_vec->clear();
while (m_expl_vec->size() < m_lemma_vec->size()) {
m_expl_vec->push_back(exp);
for (auto& e : *m_expl_vec) {
e = exp;
}
}
@ -1910,15 +1914,16 @@ struct solver::imp {
generate_explanations_of_tang_lemma(rm, bf);
}
void add_empty_lemma() {
void add_empty_lemma_and_explanation() {
m_lemma_vec->push_back(lemma());
m_expl_vec->push_back(lp::explanation());
}
void generate_tang_plane(const rational & a, const rational& b, lpvar jx, lpvar jy, bool below, lpvar j, const rational& j_sign) {
add_empty_lemma();
add_empty_lemma_and_explanation();
lemma& l = m_lemma_vec->back();
negate_relation(jx, a, l);
negate_relation(jy, a, l);
negate_relation(jy, b, l);
// If "below" holds then ay + bx - ab < xy, otherwise ay + bx - ab > xy,
// j_sign*vvr(j) stands for xy. So, finally we have ay + bx - j_sign*j < ab ( or > )
lp::lar_term t;
@ -1943,11 +1948,11 @@ struct solver::imp {
void generate_two_tang_lines(const bfc & bf, const point& xy, const rational& sign, lpvar j) {
auto rs = sign * xy.x * xy.y;
add_empty_lemma();
add_empty_lemma_and_explanation();
mk_ineq(var(bf.m_x), llc::NE, xy.x, m_lemma_vec->back());
mk_ineq(j, llc::EQ, rs, m_lemma_vec->back());
add_empty_lemma();
add_empty_lemma_and_explanation();
mk_ineq(var(bf.m_y), llc::NE, xy.y, m_lemma_vec->back());
mk_ineq(j, llc::EQ, rs, m_lemma_vec->back());
}