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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-05-14 10:25:42 -07:00
parent 587750b9a3
commit 118dc0f3b4
5 changed files with 62 additions and 20 deletions
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28
src/math/polysat/linear_solver.h
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@ -13,11 +13,13 @@ Abstract:
into linear form.
Equalities, Inequalities are converted into rows and slack variables.
Slack variables are bounded when constraints are activated.
It also handles backtracking state: bounds that are activated inside one
scope are de-activated when exiting the scope.
Author:
Nikolaj Bjorner (nbjorner) 2021-03-19
Jakob Rath 2021-04-6
Nikolaj Bjorner (nbjorner) 2021-05-14
Jakob Rath 2021-05-14
--*/
@ -47,19 +49,23 @@ namespace polysat {
m_lim(lim)
{}
void push() {}
void pop(unsigned n) {}
void internalize_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 push();
void pop(unsigned n);
void internalize_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);
// check integer modular feasibility under current bounds.
lbool check() { return l_undef; }
void unsat_core(unsigned_vector& deps) {}
lbool check();
void unsat_core(unsigned_vector& deps);
// current value assigned to (linear) variable according to tableau.
rational value(pvar v) { return rational(0); }
rational value(pvar v);
std::ostream& display(std::ostream& out) const { return out; }
void collect_statistics(::statistics & st) const {}
};