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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2021-05-16 13:50:41 -07:00
parent eaca24ac01
commit 973a32a015
2 changed files with 74 additions and 8 deletions
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41
src/math/polysat/linear_solver.h
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@ -25,6 +25,8 @@ Author:
#pragma once
#include "util/hashtable.h"
#include "util/small_object_allocator.h"
#include "math/polysat/fixplex.h"
#include "math/polysat/constraint.h"
#include "math/polysat/eq_constraint.h"
@ -38,10 +40,40 @@ namespace polysat {
enum trail_i {
inc_level_i,
add_var_i,
add_mono_i,
set_bound_i,
add_row_i
};
struct mono_info {
unsigned sz { 0 };
unsigned num_vars { 0 };
unsigned* vars { nullptr };
unsigned var { 0 };
mono_info(unsigned sz, unsigned num_vars, unsigned* vars):
sz(sz),
num_vars(num_vars),
vars(vars)
{}
mono_info() {}
struct hash {
unsigned operator()(mono_info const& i) const {
// TODO
return 0;
}
};
struct eq {
bool operator()(mono_info const& a, mono_info const& b) const {
if (a.num_vars != b.num_vars)
return false;
for (unsigned i = 0; i < a.num_vars; ++i)
if (a.vars[i] != b.vars[i])
return false;
return a.sz == b.sz;
}
};
};
solver& s;
scoped_ptr_vector<fixplex_base> m_fix;
svector<trail_i> m_trail;
@ -51,8 +83,12 @@ namespace polysat {
svector<var_t> m_vars;
vector<rational> m_coeffs;
svector<std::pair<var_t, var_t>> m_bool_var2row;
svector<std::pair<var_t, var_t>> m_bool_var2row;
hashtable<mono_info, mono_info::hash, mono_info::eq> m_mono2var;
unsigned_vector m_sz2num_vars;
small_object_allocator m_alloc;
svector<mono_info> m_monomials;
fixplex_base& sz2fixplex(unsigned sz);
@ -80,7 +116,8 @@ namespace polysat {
//
public:
linear_solver(solver& s):
s(s)
s(s),
m_alloc("mononials")
{}
void push();