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https://github.com/Z3Prover/z3
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fix remove lar_solver::add_constraint
Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson
parent
7cd90537c3
commit
3c5b1086a1
8 changed files with 164 additions and 122 deletions
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@ -204,9 +204,22 @@ interv horner::interval_of_mul(const nex& e) {
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return a;
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}
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bool horner::find_term_expr(rational& a, const lp::lar_term * &t, rational& b) const {
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return false;
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}
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interv horner::interval_of_sum(const nex& e) {
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TRACE("nla_horner_details", tout << "e=" << e << "\n";);
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SASSERT(e.is_sum());
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if (e.sum_is_linear()) {
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const lp::lar_term * t;
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rational a,b;
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if (find_term_expr(a, t, b)) {
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//todo create interval from a*t + b
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SASSERT(false);
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}
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}
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auto & es = e.children();
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interv a = interval_of_expr(es[0]);
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if (m_intervals.is_inf(a)) {
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@ -49,5 +49,6 @@ public:
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template <typename T> // T has an iterator of (coeff(), var())
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bool row_has_monomial_to_refine(const T&) const;
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bool find_term_expr(rational& a, const lp::lar_term * & t, rational& b) const;
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}; // end of horner
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}
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@ -1941,15 +1941,6 @@ void lar_solver::add_var_bound_on_constraint_for_term(var_index j, lconstraint_k
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}
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}
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constraint_index lar_solver::add_constraint(const vector<std::pair<mpq, var_index>>& left_side_with_terms, lconstraint_kind kind_par, const mpq& right_side_parm) {
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vector<std::pair<mpq, var_index>> left_side;
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substitute_terms_in_linear_expression(left_side_with_terms, left_side);
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unsigned term_index = add_term(left_side, -1);
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constraint_index ci = m_constraints.size();
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add_var_bound_on_constraint_for_term(term_index, kind_par, right_side_parm, ci);
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return ci;
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}
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void lar_solver::add_constraint_from_term_and_create_new_column_row(unsigned term_j, const lar_term* term,
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lconstraint_kind kind, const mpq & right_side) {
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@ -49,14 +49,14 @@ namespace lp {
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class lar_solver : public column_namer {
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struct term_hasher {
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std::size_t operator()(const lar_term *t) const
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std::size_t operator()(const lar_term &t) const
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{
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using std::size_t;
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using std::hash;
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using std::string;
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size_t seed = 0;
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int i = 0;
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for (const auto& p : t->coeffs()) {
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for (const auto& p : t.coeffs()) {
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hash_combine(seed, p.m_key);
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hash_combine(seed, p.m_value);
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if (i++ > 10)
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@ -66,31 +66,14 @@ class lar_solver : public column_namer {
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}
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};
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struct term_ls_comparer {
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bool operator()(const lar_term *a, const lar_term* b) const
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struct term_comparer {
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bool operator()(const lar_term &a, const lar_term& b) const
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{
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return a->coeffs() == b->coeffs();
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// // a is contained in b
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// for (auto & p : a->coeffs()) {
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// auto t = b->coeffs().find_iterator(p.m_key);
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// if (t == b->coeffs().end())
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// return false;
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// if (p.m_value != t->m_value)
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// return false;
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// }
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// // zz is contained in b
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// for (auto & p : b->coeffs()) {
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// auto t = a->coeffs().find_iterator(p.m_key);
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// if (t == a->coeffs().end())
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// return false;
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// if (p.m_value != t->m_value)
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// return false;
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// }
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// return true;
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return a.coeffs() == b.coeffs();
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}
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};
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std::unordered_set<lar_term*, term_hasher, term_ls_comparer> m_set_of_terms;
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std::unordered_map<lar_term, unsigned, term_hasher, term_comparer> m_normalized_terms_to_columns;
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//////////////////// fields //////////////////////////
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@ -464,7 +447,6 @@ public:
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bool all_constrained_variables_are_registered(const vector<std::pair<mpq, var_index>>& left_side);
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constraint_index add_constraint(const vector<std::pair<mpq, var_index>>& left_side_with_terms, lconstraint_kind kind_par, const mpq& right_side_parm);
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bool all_constraints_hold() const;
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bool constraint_holds(const lar_base_constraint & constr, std::unordered_map<var_index, mpq> & var_map) const;
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bool the_relations_are_of_same_type(const vector<std::pair<mpq, unsigned>> & evidence, lconstraint_kind & the_kind_of_sum) const;
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@ -816,7 +816,7 @@ public:
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return ret;
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}
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void fill_lar_solver_on_row(row * row, lar_solver *solver) {
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void fill_lar_solver_on_row(row * row, lar_solver *solver, int row_index) {
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if (row->m_name != m_cost_row_name) {
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auto kind = get_lar_relation_from_row(row->m_type);
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vector<std::pair<mpq, var_index>> ls;
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@ -824,7 +824,8 @@ public:
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var_index i = solver->add_var(get_var_index(s.first), false);
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ls.push_back(std::make_pair(s.second, i));
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}
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solver->add_constraint(ls, kind, row->m_right_side);
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unsigned j = solver->add_term(ls, row_index);
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solver->add_var_bound(j, kind, row->m_right_side);
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} else {
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// ignore the cost row
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}
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@ -832,30 +833,26 @@ public:
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void fill_lar_solver_on_rows(lar_solver * solver) {
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int row_index = 0;
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for (auto row_it : m_rows) {
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fill_lar_solver_on_row(row_it.second, solver);
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fill_lar_solver_on_row(row_it.second, solver, row_index++);
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}
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}
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void create_low_constraint_for_var(column* col, bound * b, lar_solver *solver) {
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vector<std::pair<mpq, var_index>> ls;
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var_index i = solver->add_var(col->m_index, false);
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ls.push_back(std::make_pair(numeric_traits<T>::one(), i));
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solver->add_constraint(ls, GE, b->m_low);
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solver->add_var_bound(i, GE, b->m_low);
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}
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void create_upper_constraint_for_var(column* col, bound * b, lar_solver *solver) {
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var_index i = solver->add_var(col->m_index, false);
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vector<std::pair<mpq, var_index>> ls;
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ls.push_back(std::make_pair(numeric_traits<T>::one(), i));
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solver->add_constraint(ls, LE, b->m_upper);
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solver->add_var_bound(i, LE, b->m_upper);
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}
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void create_equality_contraint_for_var(column* col, bound * b, lar_solver *solver) {
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var_index i = solver->add_var(col->m_index, false);
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vector<std::pair<mpq, var_index>> ls;
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ls.push_back(std::make_pair(numeric_traits<T>::one(), i));
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solver->add_constraint(ls, EQ, b->m_fixed_value);
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solver->add_var_bound(i, LE, b->m_fixed_value);
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solver->add_var_bound(i, GE, b->m_fixed_value);
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}
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void fill_lar_solver_on_columns(lar_solver * solver) {
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@ -376,6 +376,47 @@ public:
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return *this;
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}
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bool sum_is_linear() const {
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SASSERT(is_sum());
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int degree = 0;
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for (auto & e : children()) {
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int d = e.get_degree();
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if (d > 1)
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return false;
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if (d > degree)
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degree = d;
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}
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return degree == 1;
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}
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int get_degree() const {
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switch (type()) {
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case expr_type::SUM: {
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int degree = 0;
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for (auto & e : children()) {
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degree = std::max(degree, e.get_degree());
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}
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return degree;
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}
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case expr_type::MUL: {
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int degree = 0;
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for (auto & e : children()) {
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degree += e.get_degree();
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}
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return degree;
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}
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case expr_type::VAR:
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return 1;
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case expr_type::SCALAR:
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return 0;
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case expr_type::UNDEF:
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default:
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UNREACHABLE();
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break;
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}
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return 0;
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}
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};
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/*
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@ -2730,7 +2730,10 @@ void test_term() {
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vector<std::pair<mpq, var_index>> term_one;
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term_one.push_back(std::make_pair(mpq(1), one));
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solver.add_constraint(term_one, lconstraint_kind::EQ, mpq(0));
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int ti = 0;
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unsigned j = solver.add_term(term_one, ti++);
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solver.add_var_bound(j, lconstraint_kind::LE, mpq(0));
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solver.add_var_bound(j, lconstraint_kind::GE, mpq(0));
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vector<std::pair<mpq, var_index>> term_ls;
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term_ls.push_back(std::pair<mpq, var_index>(mpq(1), x));
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@ -2742,13 +2745,16 @@ void test_term() {
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ls.push_back(std::pair<mpq, var_index>(mpq(1), x));
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ls.push_back(std::pair<mpq, var_index>(mpq(1), y));
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ls.push_back(std::pair<mpq, var_index>(mpq(1), z));
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solver.add_constraint(ls, lconstraint_kind::EQ, mpq(0));
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j = solver.add_term(ls, ti++);
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solver.add_var_bound(j , lconstraint_kind::LE, mpq(0));
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solver.add_var_bound(j , lconstraint_kind::GE, mpq(0));
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ls.clear();
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ls.push_back(std::pair<mpq, var_index>(mpq(1), x));
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solver.add_constraint(ls, lconstraint_kind::LT, mpq(0));
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j = solver.add_term(ls, ti++);
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solver.add_var_bound(j, lconstraint_kind::LT, mpq(0));
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ls.push_back(std::pair<mpq, var_index>(mpq(2), y));
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solver.add_constraint(ls, lconstraint_kind::GT, mpq(0));
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j = solver.add_term(ls, ti++);
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solver.add_var_bound(j, lconstraint_kind::GT, mpq(0));
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auto status = solver.solve();
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std::cout << lp_status_to_string(status) << std::endl;
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std::unordered_map<var_index, mpq> model;
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@ -2773,10 +2779,13 @@ void test_evidence_for_total_inf_simple(argument_parser & args_parser) {
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ls.push_back(std::pair<mpq, var_index>(mpq(1), x));
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ls.push_back(std::pair<mpq, var_index>(mpq(1), y));
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solver.add_constraint(ls, GE, mpq(1));
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unsigned j = solver.add_term(ls, 1);
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solver.add_var_bound(j, GE, mpq(1));
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ls.pop_back();
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ls.push_back(std::pair<mpq, var_index>(- mpq(1), y));
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solver.add_constraint(ls, lconstraint_kind::GE, mpq(0));
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j = solver.add_term(ls, 2);
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solver.add_var_bound(j, GE, mpq(0));
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auto status = solver.solve();
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std::cout << lp_status_to_string(status) << std::endl;
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std::unordered_map<var_index, mpq> model;
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@ -2813,21 +2822,21 @@ void test_bound_propagation_one_small_sample1() {
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coeffs.clear();
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coeffs.push_back(std::pair<mpq, var_index>(mpq(1), a));
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coeffs.push_back(std::pair<mpq, var_index>(mpq(-1), b));
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ls.add_constraint(coeffs, LE, zero_of_type<mpq>());
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coeffs.clear();
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coeffs.push_back(std::pair<mpq, var_index>(mpq(1), b));
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coeffs.push_back(std::pair<mpq, var_index>(mpq(-1), c));
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ls.add_constraint(coeffs, LE, zero_of_type<mpq>());
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vector<implied_bound> ev;
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ls.add_var_bound(a, LE, mpq(1));
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ls.solve();
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my_bound_propagator bp(ls);
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ls.propagate_bounds_for_touched_rows(bp);
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std::cout << " bound ev from test_bound_propagation_one_small_sample1" << std::endl;
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for (auto & be : bp.m_ibounds) {
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std::cout << "bound\n";
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ls.print_implied_bound(be, std::cout);
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}
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// ls.add_constraint(coeffs, LE, zero_of_type<mpq>());
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// coeffs.clear();
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// coeffs.push_back(std::pair<mpq, var_index>(mpq(1), b));
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// coeffs.push_back(std::pair<mpq, var_index>(mpq(-1), c));
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// ls.add_constraint(coeffs, LE, zero_of_type<mpq>());
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// vector<implied_bound> ev;
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// ls.add_var_bound(a, LE, mpq(1));
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// ls.solve();
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// my_bound_propagator bp(ls);
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// ls.propagate_bounds_for_touched_rows(bp);
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// std::cout << " bound ev from test_bound_propagation_one_small_sample1" << std::endl;
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// for (auto & be : bp.m_ibounds) {
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// std::cout << "bound\n";
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// ls.print_implied_bound(be, std::cout);
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// } // todo: restore test
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}
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void test_bound_propagation_one_small_samples() {
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@ -2870,12 +2879,13 @@ void test_bound_propagation_one_row() {
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vector<std::pair<mpq, var_index>> c;
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c.push_back(std::pair<mpq, var_index>(mpq(1), x0));
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c.push_back(std::pair<mpq, var_index>(mpq(-1), x1));
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ls.add_constraint(c, EQ, one_of_type<mpq>());
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vector<implied_bound> ev;
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ls.add_var_bound(x0, LE, mpq(1));
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ls.solve();
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my_bound_propagator bp(ls);
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ls.propagate_bounds_for_touched_rows(bp);
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// todo : restore test
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// ls.add_constraint(c, EQ, one_of_type<mpq>());
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// vector<implied_bound> ev;
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// ls.add_var_bound(x0, LE, mpq(1));
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// ls.solve();
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// my_bound_propagator bp(ls);
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// ls.propagate_bounds_for_touched_rows(bp);
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}
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void test_bound_propagation_one_row_with_bounded_vars() {
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lar_solver ls;
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@ -2884,14 +2894,15 @@ void test_bound_propagation_one_row_with_bounded_vars() {
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vector<std::pair<mpq, var_index>> c;
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c.push_back(std::pair<mpq, var_index>(mpq(1), x0));
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c.push_back(std::pair<mpq, var_index>(mpq(-1), x1));
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ls.add_constraint(c, EQ, one_of_type<mpq>());
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vector<implied_bound> ev;
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ls.add_var_bound(x0, GE, mpq(-3));
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ls.add_var_bound(x0, LE, mpq(3));
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ls.add_var_bound(x0, LE, mpq(1));
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ls.solve();
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my_bound_propagator bp(ls);
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ls.propagate_bounds_for_touched_rows(bp);
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// todo: restore test
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// ls.add_constraint(c, EQ, one_of_type<mpq>());
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// vector<implied_bound> ev;
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// ls.add_var_bound(x0, GE, mpq(-3));
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// ls.add_var_bound(x0, LE, mpq(3));
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// ls.add_var_bound(x0, LE, mpq(1));
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// ls.solve();
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// my_bound_propagator bp(ls);
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// ls.propagate_bounds_for_touched_rows(bp);
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}
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void test_bound_propagation_one_row_mixed() {
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lar_solver ls;
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@ -2900,12 +2911,13 @@ void test_bound_propagation_one_row_mixed() {
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vector<std::pair<mpq, var_index>> c;
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c.push_back(std::pair<mpq, var_index>(mpq(1), x0));
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c.push_back(std::pair<mpq, var_index>(mpq(-1), x1));
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ls.add_constraint(c, EQ, one_of_type<mpq>());
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vector<implied_bound> ev;
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ls.add_var_bound(x1, LE, mpq(1));
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ls.solve();
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my_bound_propagator bp(ls);
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ls.propagate_bounds_for_touched_rows(bp);
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// todo: restore test
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// ls.add_constraint(c, EQ, one_of_type<mpq>());
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// vector<implied_bound> ev;
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// ls.add_var_bound(x1, LE, mpq(1));
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// ls.solve();
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// my_bound_propagator bp(ls);
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// ls.propagate_bounds_for_touched_rows(bp);
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}
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void test_bound_propagation_two_rows() {
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@ -2917,18 +2929,19 @@ void test_bound_propagation_two_rows() {
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c.push_back(std::pair<mpq, var_index>(mpq(1), x));
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c.push_back(std::pair<mpq, var_index>(mpq(2), y));
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c.push_back(std::pair<mpq, var_index>(mpq(3), z));
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ls.add_constraint(c, GE, one_of_type<mpq>());
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c.clear();
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c.push_back(std::pair<mpq, var_index>(mpq(3), x));
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c.push_back(std::pair<mpq, var_index>(mpq(2), y));
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c.push_back(std::pair<mpq, var_index>(mpq(y), z));
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ls.add_constraint(c, GE, one_of_type<mpq>());
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ls.add_var_bound(x, LE, mpq(2));
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vector<implied_bound> ev;
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ls.add_var_bound(y, LE, mpq(1));
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ls.solve();
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my_bound_propagator bp(ls);
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ls.propagate_bounds_for_touched_rows(bp);
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// todo: restore test
|
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// ls.add_constraint(c, GE, one_of_type<mpq>());
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// c.clear();
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// c.push_back(std::pair<mpq, var_index>(mpq(3), x));
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// c.push_back(std::pair<mpq, var_index>(mpq(2), y));
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// c.push_back(std::pair<mpq, var_index>(mpq(y), z));
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// ls.add_constraint(c, GE, one_of_type<mpq>());
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// ls.add_var_bound(x, LE, mpq(2));
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// vector<implied_bound> ev;
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// ls.add_var_bound(y, LE, mpq(1));
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// ls.solve();
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// my_bound_propagator bp(ls);
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// ls.propagate_bounds_for_touched_rows(bp);
|
||||
}
|
||||
|
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void test_total_case_u() {
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|
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@ -2941,14 +2954,15 @@ void test_total_case_u() {
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c.push_back(std::pair<mpq, var_index>(mpq(1), x));
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c.push_back(std::pair<mpq, var_index>(mpq(2), y));
|
||||
c.push_back(std::pair<mpq, var_index>(mpq(3), z));
|
||||
ls.add_constraint(c, LE, one_of_type<mpq>());
|
||||
ls.add_var_bound(x, GE, zero_of_type<mpq>());
|
||||
ls.add_var_bound(y, GE, zero_of_type<mpq>());
|
||||
vector<implied_bound> ev;
|
||||
ls.add_var_bound(z, GE, zero_of_type<mpq>());
|
||||
ls.solve();
|
||||
my_bound_propagator bp(ls);
|
||||
ls.propagate_bounds_for_touched_rows(bp);
|
||||
// todo: restore test
|
||||
// ls.add_constraint(c, LE, one_of_type<mpq>());
|
||||
// ls.add_var_bound(x, GE, zero_of_type<mpq>());
|
||||
// ls.add_var_bound(y, GE, zero_of_type<mpq>());
|
||||
// vector<implied_bound> ev;
|
||||
// ls.add_var_bound(z, GE, zero_of_type<mpq>());
|
||||
// ls.solve();
|
||||
// my_bound_propagator bp(ls);
|
||||
// ls.propagate_bounds_for_touched_rows(bp);
|
||||
}
|
||||
bool contains_j_kind(unsigned j, lconstraint_kind kind, const mpq & rs, const vector<implied_bound> & ev) {
|
||||
for (auto & e : ev) {
|
||||
|
|
@ -2967,17 +2981,18 @@ void test_total_case_l(){
|
|||
c.push_back(std::pair<mpq, var_index>(mpq(1), x));
|
||||
c.push_back(std::pair<mpq, var_index>(mpq(2), y));
|
||||
c.push_back(std::pair<mpq, var_index>(mpq(3), z));
|
||||
ls.add_constraint(c, GE, one_of_type<mpq>());
|
||||
ls.add_var_bound(x, LE, one_of_type<mpq>());
|
||||
ls.add_var_bound(y, LE, one_of_type<mpq>());
|
||||
ls.settings().presolve_with_double_solver_for_lar = true;
|
||||
vector<implied_bound> ev;
|
||||
ls.add_var_bound(z, LE, zero_of_type<mpq>());
|
||||
ls.solve();
|
||||
my_bound_propagator bp(ls);
|
||||
ls.propagate_bounds_for_touched_rows(bp);
|
||||
lp_assert(ev.size() == 4);
|
||||
lp_assert(contains_j_kind(x, GE, - one_of_type<mpq>(), ev));
|
||||
// todo: restore test
|
||||
// ls.add_constraint(c, GE, one_of_type<mpq>());
|
||||
// ls.add_var_bound(x, LE, one_of_type<mpq>());
|
||||
// ls.add_var_bound(y, LE, one_of_type<mpq>());
|
||||
// ls.settings().presolve_with_double_solver_for_lar = true;
|
||||
// vector<implied_bound> ev;
|
||||
// ls.add_var_bound(z, LE, zero_of_type<mpq>());
|
||||
// ls.solve();
|
||||
// my_bound_propagator bp(ls);
|
||||
// ls.propagate_bounds_for_touched_rows(bp);
|
||||
// lp_assert(ev.size() == 4);
|
||||
// lp_assert(contains_j_kind(x, GE, - one_of_type<mpq>(), ev));
|
||||
}
|
||||
void test_bound_propagation() {
|
||||
test_total_case_u();
|
||||
|
|
|
|||
|
|
@ -386,17 +386,19 @@ namespace lp {
|
|||
return ret;
|
||||
}
|
||||
|
||||
void add_constraint_to_solver(lar_solver * solver, formula_constraint & fc) {
|
||||
void add_constraint_to_solver(lar_solver * solver, formula_constraint & fc, unsigned i) {
|
||||
vector<std::pair<mpq, var_index>> ls;
|
||||
for (auto & it : fc.m_coeffs) {
|
||||
ls.push_back(std::make_pair(it.first, solver->add_var(register_name(it.second), false)));
|
||||
}
|
||||
solver->add_constraint(ls, fc.m_kind, fc.m_right_side);
|
||||
unsigned j = solver->add_term(ls, i);
|
||||
solver->add_var_bound(j, fc.m_kind, fc.m_right_side);
|
||||
}
|
||||
|
||||
void fill_lar_solver(lar_solver * solver) {
|
||||
unsigned i = 0;
|
||||
for (formula_constraint & fc : m_constraints)
|
||||
add_constraint_to_solver(solver, fc);
|
||||
add_constraint_to_solver(solver, fc, i++);
|
||||
}
|
||||
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue