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adding deps

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-08-04 14:02:32 -07:00
parent 91ac15d716
commit be9f172cc0
7 changed files with 268 additions and 194 deletions
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34
src/math/polysat/linear_solver.h
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@ -43,7 +43,8 @@ namespace polysat {
add_mono_i,
set_bound_i,
add_ineq_i,
add_row_i
add_row_i,
set_active_i
};
struct mono_info {
@ -81,6 +82,7 @@ namespace polysat {
svector<std::pair<var_t, unsigned>> m_rows;
unsigned_vector m_var2ext;
unsigned_vector m_ext2var;
ptr_vector<constraint> m_active;
svector<var_t> m_vars;
vector<rational> m_coeffs;
@ -90,29 +92,31 @@ namespace polysat {
unsigned_vector m_sz2num_vars;
small_object_allocator m_alloc;
svector<mono_info> m_monomials;
fixplex_base* m_unsat_f = nullptr;
fixplex_base& sz2fixplex(unsigned sz);
void linearize(pdd const& p);
var_t fresh_var(unsigned sz);
var_t internalize_pdd(pdd const& p);
void new_eq(eq_constraint& eq);
void new_le(ule_constraint& le);
void assert_eq(eq_constraint& eq);
void assert_le(ule_constraint& le);
void assert_eq(bool is_positive, eq_constraint& eq);
void assert_le(bool is_positive, ule_constraint& le);
// bind monomial to variable.
var_t mono2var(unsigned sz, unsigned_vector const& m);
var_t pvar2var(unsigned sz, pvar v);
unsigned_vector var2mono(unsigned sz, var_t v) { throw default_exception("nyi"); }
//
// TBD trail object for
// removing variables
// undoing variable bounds bounds
// removing rows from fixplex
//
// unsigned_vector var2mono(unsigned sz, var_t v) { throw default_exception("nyi"); }
// distinguish constraint and justification dependencies
unsigned external_dep2dep(unsigned dep) const { return UINT_MAX - dep; }
unsigned constraint_idx2dep(unsigned idx) const { return idx; }
bool is_constraint_dep(unsigned dep) const { return dep < UINT_MAX / 2; }
unsigned dep2constraint_idx(unsigned dep) const { return dep; }
unsigned dep2external_dep(unsigned dep) const { return UINT_MAX - dep; }
public:
linear_solver(solver& s):
s(s),
@ -122,13 +126,13 @@ namespace polysat {
void push();
void pop(unsigned n);
void new_constraint(constraint& c);
void set_value(pvar v, rational const& value);
void set_bound(pvar v, rational const& lo, rational const& hi);
void activate_constraint(constraint& c);
void set_value(pvar v, rational const& value, unsigned dep);
void set_bound(pvar v, rational const& lo, rational const& hi, unsigned dep);
void activate_constraint(bool is_positive, constraint& c);
// check integer modular feasibility under current bounds.
lbool check();
void unsat_core(unsigned_vector& deps);
void unsat_core(ptr_vector<constraint>& constraints, unsigned_vector& deps);
// current value assigned to (linear) variable according to tableau.
rational value(pvar v);