23 #include <minisat/core/Solver.h>
24 #include <minisat/simp/SimpSolver.h>
27 #error "Expected HAVE_MINISAT2"
30 void convert(
const bvt &bv, Minisat::vec<Minisat::Lit> &dest)
33 bv.size() <=
static_cast<std::size_t
>(std::numeric_limits<int>::max()));
34 dest.capacity(
static_cast<int>(bv.size()));
38 dest.push(Minisat::mkLit(it->var_no(), it->sign()));
79 catch(Minisat::OutOfMemoryException)
81 log.error() <<
"SAT checker ran out of memory" <<
messaget::eom;
82 status = statust::ERROR;
83 throw std::bad_alloc();
101 return "MiniSAT 2.2.1 without simplifier";
106 return "MiniSAT 2.2.1 with simplifier";
112 while((
unsigned)
solver->nVars()<no_variables())
127 else if(!it->is_false())
130 it->var_no() < (
unsigned)
solver->nVars(),
"variable not added yet");
134 Minisat::vec<Minisat::Lit> c;
145 catch(
const Minisat::OutOfMemoryException &)
147 log.error() <<
"SAT checker ran out of memory" <<
messaget::eom;
148 status = statust::ERROR;
149 throw std::bad_alloc();
165 template <
typename T>
170 log.statistics() << (no_variables() - 1) <<
" variables, "
179 log.status() <<
"SAT checker inconsistent: instance is UNSATISFIABLE"
181 status = statust::UNSAT;
182 return resultt::P_UNSATISFIABLE;
186 for(
const auto &assumption : assumptions)
188 if(assumption.is_false())
190 log.status() <<
"got FALSE as assumption: instance is UNSATISFIABLE"
192 status = statust::UNSAT;
193 return resultt::P_UNSATISFIABLE;
197 Minisat::vec<Minisat::Lit> solver_assumptions;
198 convert(assumptions, solver_assumptions);
200 using Minisat::lbool;
204 void (*old_handler)(int) = SIG_ERR;
206 if(time_limit_seconds != 0)
210 if(old_handler == SIG_ERR)
211 log.warning() <<
"Failed to set solver time limit" <<
messaget::eom;
213 alarm(time_limit_seconds);
216 lbool solver_result =
solver->solveLimited(solver_assumptions);
218 if(old_handler != SIG_ERR)
221 signal(SIGALRM, old_handler);
227 if(time_limit_seconds != 0)
229 log.warning() <<
"Time limit ignored (not supported on Win32 yet)"
233 lbool solver_result =
solver->solve(solver_assumptions) ? l_True : l_False;
237 if(solver_result == l_True)
239 log.status() <<
"SAT checker: instance is SATISFIABLE" <<
messaget::eom;
241 status = statust::SAT;
242 return resultt::P_SATISFIABLE;
245 if(solver_result == l_False)
247 log.status() <<
"SAT checker: instance is UNSATISFIABLE" <<
messaget::eom;
248 status = statust::UNSAT;
249 return resultt::P_UNSATISFIABLE;
252 log.status() <<
"SAT checker: timed out or other error" <<
messaget::eom;
253 status = statust::ERROR;
254 return resultt::P_ERROR;
256 catch(
const Minisat::OutOfMemoryException &)
258 log.error() <<
"SAT checker ran out of memory" <<
messaget::eom;
259 status=statust::ERROR;
260 return resultt::P_ERROR;
272 bool sign = a.
sign();
275 solver->model.growTo(v + 1);
277 solver->model[v] = Minisat::lbool(value);
279 catch(
const Minisat::OutOfMemoryException &)
281 log.error() <<
"SAT checker ran out of memory" <<
messaget::eom;
282 status = statust::ERROR;
283 throw std::bad_alloc();
287 template <
typename T>
312 for(
int i=0; i<
solver->conflict.size(); i++)
313 if(var(
solver->conflict[i])==v)
325 for(
const auto &assumption : bv)
327 if(!assumption.is_true())
329 assumptions.push_back(assumption);
360 catch(
const Minisat::OutOfMemoryException &)
364 throw std::bad_alloc();