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fix the race in add_var_bound and add_def_constraint

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2020-06-12 12:27:25 -07:00
parent fe0e042e40
commit 06826adec3
3 changed files with 63 additions and 29 deletions
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15
src/math/lp/lar_solver.h
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@ -109,7 +109,6 @@ class lar_solver : public column_namer {
unsigned,
value_sort_pair_hash,
default_eq<value_sort_pair>> m_fixed_var_table;
std::function <void(unsigned, unsigned)> m_report_equality_of_fixed_vars;
// end of fields
////////////////// methods ////////////////////////////////
@ -143,14 +142,15 @@ class lar_solver : public column_namer {
const impq& get_value(column_index const& j) const { return get_column_value(j); }
void update_column_type_and_bound(var_index j, lconstraint_kind kind, const mpq & right_side, constraint_index constr_index);
void update_column_type_and_bound_check_on_equal(unsigned j, lconstraint_kind kind, const mpq & right_side, constraint_index constr_index, unsigned&);
void update_column_type_and_bound(unsigned j, lconstraint_kind kind, const mpq & right_side, constraint_index constr_index);
void update_column_type_and_bound_with_ub(var_index j, lconstraint_kind kind, const mpq & right_side, constraint_index constr_index);
void update_column_type_and_bound_with_no_ub(var_index j, lconstraint_kind kind, const mpq & right_side, constraint_index constr_index);
void update_bound_with_ub_lb(var_index j, lconstraint_kind kind, const mpq & right_side, constraint_index constr_index);
void update_bound_with_no_ub_lb(var_index j, lconstraint_kind kind, const mpq & right_side, constraint_index constr_index);
void update_bound_with_ub_no_lb(var_index j, lconstraint_kind kind, const mpq & right_side, constraint_index constr_index);
void update_bound_with_no_ub_no_lb(var_index j, lconstraint_kind kind, const mpq & right_side, constraint_index constr_index);
void register_in_fixed_var_table(var_index);
void register_in_fixed_var_table(unsigned, unsigned&);
void remove_non_fixed_from_fixed_var_table();
constraint_index add_var_bound_on_constraint_for_term(var_index j, lconstraint_kind kind, const mpq & right_side);
inline void set_infeasible_column(unsigned j) {
@ -342,7 +342,8 @@ public:
}
// lp_assert(implied_bound_is_correctly_explained(ib, explanation)); }
constraint_index mk_var_bound(var_index j, lconstraint_kind kind, const mpq & right_side);
void activate(constraint_index ci);
void activate_check_on_equal(constraint_index, var_index&);
void activate(constraint_index);
void random_update(unsigned sz, var_index const * vars);
template <typename T>
void propagate_bounds_for_touched_rows(lp_bound_propagator<T> & bp) {
@ -361,7 +362,9 @@ public:
bool compare_values(var_index j, lconstraint_kind kind, const mpq & right_side);
var_index add_term(const vector<std::pair<mpq, var_index>> & coeffs, unsigned ext_i);
void register_existing_terms();
constraint_index add_var_bound(var_index j, lconstraint_kind kind, const mpq & right_side) ;
constraint_index add_var_bound(var_index, lconstraint_kind, const mpq &);
constraint_index add_var_bound_check_on_equal(var_index, lconstraint_kind, const mpq &, var_index&);
var_index add_var(unsigned ext_j, bool is_integer);
void set_cut_strategy(unsigned cut_frequency);
inline unsigned column_count() const { return A_r().column_count(); }
@ -593,7 +596,7 @@ public:
void fill_explanation_from_crossed_bounds_column(explanation & evidence) const;
bool term_is_used_as_row(unsigned term) const;
bool tighten_term_bounds_by_delta(tv const& t, const impq&);
lar_solver(const std::function <void(unsigned, unsigned)>& report_equality_of_fixed_vars);
lar_solver();
void set_track_pivoted_rows(bool v);
bool get_track_pivoted_rows() const;
virtual ~lar_solver();