spot 2.11.4.dev
satsolver.hh
1// -*- coding: utf-8 -*-
2// Copyright (C) 2013, 2017-2018, 2020, 2022 Laboratoire de Recherche
3// et Développement de l'Epita.
4//
5// This file is part of Spot, a model checking library.
6//
7// Spot is free software; you can redistribute it and/or modify it
8// under the terms of the GNU General Public License as published by
9// the Free Software Foundation; either version 3 of the License, or
10// (at your option) any later version.
11//
12// Spot is distributed in the hope that it will be useful, but WITHOUT
13// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15// License for more details.
16//
17// You should have received a copy of the GNU General Public License
18// along with this program. If not, see <http://www.gnu.org/licenses/>.
19
20#pragma once
21
22#include <spot/misc/common.hh>
23#include <spot/misc/tmpfile.hh>
24#include <vector>
25#include <stdexcept>
26#include <iosfwd>
27#include <initializer_list>
28
29struct PicoSAT; // forward
30
31namespace spot
32{
33 class printable;
34
44 {
45 private:
46 const char* satsolver;
47
48 public:
50
53
55 int run(printable* in, printable* out);
56
57 };
58
70 class SPOT_API satsolver
71 {
72 public:
77 ~satsolver();
78
80 void adjust_nvars(int nvars);
81
83 void set_nassumptions_vars(int nassumptions_vars);
84
86 void add(std::initializer_list<int> values);
87
89 void add(int v);
90
92 int get_nb_clauses() const;
93
95 int get_nb_vars() const;
96
98 std::pair<int, int> stats() const;
99
102 template<typename T>
103 void comment_rec(T single);
104
107 template<typename T, typename... Args>
108 void comment_rec(T first, Args... args);
109
112 template<typename T>
113 void comment(T single);
114
117 template<typename T, typename... Args>
118 void comment(T first, Args... args);
119
122 void assume(int lit);
123
124 typedef std::vector<bool> solution;
125 typedef std::pair<int, solution> solution_pair;
126
128 solution_pair get_solution();
129
130 private: // methods
132 void start();
133
135 void end_clause();
136
139 satsolver::solution
140 picosat_get_sol(int res);
141
143 satsolver::solution
144 satsolver_get_sol(const char* filename);
145
147 bool
148 xcnf_mode();
149
150 private: // variables
153
154 // cnf streams and associated clause counter.
155 // The next 2 pointers will be != nullptr if SPOT_SATSOLVER is given.
156 temporary_file* cnf_tmp_;
157 std::ostream* cnf_stream_;
158 int nclauses_;
159 int nvars_;
160 int nassumptions_vars_; // Surplus of vars (for 'assume' algorithm).
161
164 int nsols_;
165
167 PicoSAT* psat_;
168
169 // The next 2 pointers will be initialized if SPOT_XCNF env var
170 // is set. This requires SPOT_SATSOLVER to be set as well.
171 std::ofstream* xcnf_tmp_;
172 std::ofstream* xcnf_stream_;
173 std::string path_;
174 };
175
176 template<typename T>
177 void
179 {
180 if (!psat_)
181 *cnf_stream_ << ' ' << single;
182 }
183
184 template<typename T, typename... Args>
185 void
186 satsolver::comment_rec(T first, Args... args)
187 {
188 if (!psat_)
189 {
190 *cnf_stream_ << ' ' << first;
191 comment_rec(args...);
192 }
193 }
194
195 template<typename T>
196 void
198 {
199 if (!psat_)
200 *cnf_stream_ << "c " << single;
201 }
202
203 template<typename T, typename... Args>
204 void
205 satsolver::comment(T first, Args... args)
206 {
207 if (!psat_)
208 {
209 *cnf_stream_ << "c " << first;
210 comment_rec(args...);
211 }
212 }
213
214}
Definition: formater.hh:113
Definition: formater.hh:31
Interface with a given sat solver.
Definition: satsolver.hh:44
bool command_given()
Return true if a satsolver is given, false otherwise.
int run(printable *in, printable *out)
Run the given satsolver.
Interface with a SAT solver.
Definition: satsolver.hh:71
std::pair< int, int > stats() const
Returns std::pair<nvars, nclauses>;.
void add(std::initializer_list< int > values)
Add a list of lit. to the current clause.
void add(int v)
Add a single lit. to the current clause.
solution_pair get_solution()
Return std::vector<solving_return_code, solution>.
satsolver()
Construct the sat solver and itinialize variables. If no satsolver is provided through SPOT_SATSOLVER...
int get_nb_vars() const
Get the current number of variables.
void comment(T single)
Add a comment. It will start with "c ". It should be used only in debug mode after providing a satsol...
Definition: satsolver.hh:197
void comment_rec(T single)
Add a comment. It should be used only in debug mode after providing a satsolver.
Definition: satsolver.hh:178
void set_nassumptions_vars(int nassumptions_vars)
Declare the number of vars reserved for assumptions.
int get_nb_clauses() const
Get the current number of clauses.
void assume(int lit)
Assume a litteral value. Must only be used with distributed picolib.
void adjust_nvars(int nvars)
Adjust the number of variables used in the cnf formula.
Temporary file name.
Definition: tmpfile.hh:50
Definition: automata.hh:27

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