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map vars to constraints

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2018-08-19 15:03:58 +08:00
parent 88ea90fbb9
commit 93ec6360bd
1 changed files with 43 additions and 11 deletions
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54
src/util/lp/niil_solver.cpp
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@ -174,11 +174,24 @@ struct solver::imp {
exp.insert(k);
}
}; // end of vars_equivalence
typedef lp::lar_base_constraint lpcon;
struct var_info {
svector<unsigned> m_monomials; // of the var
svector<const lpcon*> m_constraints; // of the var
const svector<unsigned>& mons() const { return m_monomials;}
svector<unsigned>& mons() { return m_monomials;}
const svector<const lpcon*>& constraints() const { return m_constraints;}
void add_monomial(unsigned i) { mons().push_back(i); }
void add_constraint(const lpcon* i) { m_constraints.push_back(i); };
};
vars_equivalence m_vars_equivalence;
vector<mon_eq> m_monomials;
unsigned_vector m_monomials_lim;
lp::lar_solver& m_lar_solver;
std::unordered_map<lpvar, svector<unsigned>> m_var_to_monomials;
std::unordered_map<lpvar, var_info> m_var_infos;
lp::explanation * m_expl;
lemma * m_lemma;
imp(lp::lar_solver& s, reslimit& lim, params_ref const& p)
@ -290,8 +303,8 @@ struct solver::imp {
bool generate_basic_lemma_for_mon_sign_var(unsigned i_mon,
unsigned j_var, const svector<lpvar>& mon_vars, int sign) {
auto it = m_var_to_monomials.find(j_var);
for (auto other_i_mon : it->second) {
auto it = m_var_infos.find(j_var);
for (auto other_i_mon : it->second.mons()) {
if (other_i_mon == i_mon) continue;
if (generate_basic_lemma_for_mon_sign_var_other_mon(
i_mon,
@ -355,21 +368,40 @@ struct solver::imp {
void map_monominals_vars(unsigned i) {
const mon_eq& m = m_monomials[i];
for (lpvar j : m.m_vs) {
auto it = m_var_to_monomials.find(j);
if (it == m_var_to_monomials.end()) {
auto vect = svector<unsigned>();
vect.push_back(i);
m_var_to_monomials[j] = vect;
auto it = m_var_infos.find(j);
if (it == m_var_infos.end()) {
var_info v;
v.add_monomial(i);
m_var_infos[j] = v;
}
else {
it->second.push_back(i);
it->second.add_monomial(i);
}
}
}
void bind_var_and_constraint(lpvar j, const lpcon* c) {
auto it = m_var_infos.find(j);
if (it == m_var_infos.end()) {
var_info v;
v.add_constraint(c);
m_var_infos.insert(std::pair<lpvar, var_info>(j, v));
} else {
it->second.add_constraint(c);
}
}
void map_var_to_monomials() {
void process_constraint_vars(const lpcon* c) {
for (const auto p : c->get_left_side_coefficients())
bind_var_and_constraint(p.second, c);
}
void map_vars_to_monomials_and_constraints() {
for (unsigned i = 0; i < m_monomials.size(); i++)
map_monominals_vars(i);
for (const auto c : m_lar_solver.constraints()) {
process_constraint_vars(c);
}
}
void init_vars_equivalence() {
@ -377,7 +409,7 @@ struct solver::imp {
}
void init_search() {
map_var_to_monomials();
map_vars_to_monomials_and_constraints();
init_vars_equivalence();
}