text: /******************************************
  Copyright (C) 2009-2020 Authors of CryptoMiniSat, see AUTHORS file
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
  ***********************************************/
  
  #include "sls.h"
  #include "solver.h"
  #ifdef USE_YALSAT
  #include "yalsat.h"
  #endif
  #include "walksat.h"
  #include "walksatlm.h"
  #include "walksatmvt.h"
  #include "ccnr_cms.h"
  #include "oneplusone.h"
  #include "oneplusonefea.h"
  #include "oneplusonefeaup.h"
  #include "oneplusoneyasa.h"
  #include "genetic.h"
  
  using namespace CMSat;
  
  SLS::SLS(Solver* _solver) :
      solver(_solver)
  {}
  
  SLS::~SLS()
  {}
  
  lbool SLS::run(const uint32_t num_sls_called)
  {
      if (solver->conf.which_sls == "yalsat") {
  #ifdef USE_YALSAT
          return run_yalsat();
  #else
          cout << "ERROR: yalsat was not compiled in. Set -DREQUIRE_YALSAT=ON" << endl;
          exit(-1);
  #endif
      } else if (solver->conf.which_sls == "ccnr") {
          return run_ccnr(num_sls_called);
      } else if (solver->conf.which_sls == "walksat") {
          return run_walksat();
      } else if (solver->conf.which_sls == "walksatlm") {
          return run_walksatlm();
      } else if (solver->conf.which_sls == "walksatmvt") {
          return run_walksatmvt();
      } else if (solver->conf.which_sls == "oneplusone") {
          return run_oneplusone();
      } else if (solver->conf.which_sls == "oneplusonefea") {
          return run_oneplusonefea();
      } else if (solver->conf.which_sls == "oneplusonefeaup") {
          return run_oneplusonefeaup();
      } else if (solver->conf.which_sls == "oneplusoneyasa") {
          return run_oneplusoneyasa();
      } else if (solver->conf.which_sls == "genetic") {
          return run_genetic();
      } else if (solver->conf.which_sls == "ccnr_yalsat") {
          if ((num_sls_called % 2) == 0) {
              return run_ccnr(num_sls_called);
          } else {
              #ifdef USE_YALSAT
              return run_yalsat();
              #else
              cout << "ERROR: yalsat was not compiled in. Set -DREQUIRE_YALSAT=ON" << endl;
              exit(-1);
              #endif
          }
      } else {
          cout << "ERROR: SLS configuration '" << solver->conf.which_sls
          << "' does not exist. Only 'yalsat', 'walksat', 'walksatmvt', 'oneplusonefea', 'oneplusonefeaup', 'genetic' are acceptable."
          << endl;
          exit(-1);
      }
  }
  
  lbool SLS::run_walksat()
  {
      WalkSAT walksat(solver);
      double mem_needed_mb = (double)approx_mem_needed()/(1000.0*1000.0);
      double maxmem = solver->conf.sls_memoutMB*solver->conf.var_and_mem_out_mult;
      if (mem_needed_mb < maxmem) {
          lbool ret = walksat.main();
          return ret;
      }
  
      if (solver->conf.verbosity) {
          cout << "c [sls] would need "
               << std::setprecision(2) << std::fixed << mem_needed_mb
               << " MB but that's over limit of " << std::fixed << maxmem
               << " MB -- skipping" << endl;
      }
  
      return l_Undef;
  }
  
  lbool SLS::run_walksatlm()
  {
      WalkLmSAT walksat(solver);
      double mem_needed_mb = (double)approx_mem_needed()/(1000.0*1000.0);
      double maxmem = solver->conf.sls_memoutMB*solver->conf.var_and_mem_out_mult;
      if (mem_needed_mb < maxmem) {
          lbool ret = walksat.main();
          return ret;
      }
  
      if (solver->conf.verbosity) {
          cout << "c [sls] would need "
               << std::setprecision(2) << std::fixed << mem_needed_mb
               << " MB but that's over limit of " << std::fixed << maxmem
               << " MB -- skipping" << endl;
      }
  
      return l_Undef;
  }
  
  lbool SLS::run_walksatmvt()
  {
      WalkMvtSAT walksat(solver);
      double mem_needed_mb = (double)approx_mem_needed()/(1000.0*1000.0);
      double maxmem = solver->conf.sls_memoutMB*solver->conf.var_and_mem_out_mult;
      if (mem_needed_mb < maxmem) {
          lbool ret = walksat.main();
          return ret;
      }
  
      if (solver->conf.verbosity) {
          cout << "c [sls] would need "
          << std::setprecision(2) << std::fixed << mem_needed_mb
          << " MB but that's over limit of " << std::fixed << maxmem
          << " MB -- skipping" << endl;
      }
  
      return l_Undef;
  }
  
  lbool SLS::run_oneplusone()
  {
      OnePlusOneSAT oneplusone(solver);
      double mem_needed_mb = (double)approx_mem_needed()/(1000.0*1000.0);
      double maxmem = solver->conf.sls_memoutMB*solver->conf.var_and_mem_out_mult;
      if (mem_needed_mb < maxmem) {
          lbool ret = oneplusone.main();
          return ret;
      }
  
      if (solver->conf.verbosity) {
          cout << "c [sls] would need "
               << std::setprecision(2) << std::fixed << mem_needed_mb
               << " MB but that's over limit of " << std::fixed << maxmem
               << " MB -- skipping" << endl;
      }
  
      return l_Undef;
  }
  
  lbool SLS::run_oneplusonefea()
  {
      OnePlusOneFeaSAT oneplusone(solver);
      double mem_needed_mb = (double)approx_mem_needed()/(1000.0*1000.0);
      double maxmem = solver->conf.sls_memoutMB*solver->conf.var_and_mem_out_mult;
      if (mem_needed_mb < maxmem) {
          lbool ret = oneplusone.main();
          return ret;
      }
  
      if (solver->conf.verbosity) {
          cout << "c [sls] would need "
               << std::setprecision(2) << std::fixed << mem_needed_mb
               << " MB but that's over limit of " << std::fixed << maxmem
               << " MB -- skipping" << endl;
      }
  
      return l_Undef;
  }
  
  lbool SLS::run_oneplusonefeaup()
  {
      OnePlusOneFeaUnitPropSAT oneplusone(solver);
      double mem_needed_mb = (double)approx_mem_needed()/(1000.0*1000.0);
      double maxmem = solver->conf.sls_memoutMB*solver->conf.var_and_mem_out_mult;
      if (mem_needed_mb < maxmem) {
          lbool ret = oneplusone.main();
          return ret;
      }
  
      if (solver->conf.verbosity) {
          cout << "c [sls] would need "
               << std::setprecision(2) << std::fixed << mem_needed_mb
               << " MB but that's over limit of " << std::fixed << maxmem
               << " MB -- skipping" << endl;
      }
  
      return l_Undef;
  }
  
  lbool SLS::run_oneplusoneyasa() {
      OnePlusOneYasaSAT oneplusone(solver);
      double mem_needed_mb = (double)approx_mem_needed()/(1000.0*1000.0);
      double maxmem = solver->conf.sls_memoutMB*solver->conf.var_and_mem_out_mult;
      if (mem_needed_mb < maxmem) {
          lbool ret = oneplusone.main();
          return ret;
      }
  
      if (solver->conf.verbosity) {
          cout << "c [sls] would need "
               << std::setprecision(2) << std::fixed << mem_needed_mb
               << " MB but that's over limit of " << std::fixed << maxmem
               << " MB -- skipping" << endl;
      }
  
      return l_Undef;
  }
  
  lbool SLS::run_genetic()
  {
      GeneticSAT genetic(solver);
      double mem_needed_mb = (double)approx_mem_needed()/(1000.0*1000.0);
      double maxmem = solver->conf.sls_memoutMB*solver->conf.var_and_mem_out_mult;
      if (mem_needed_mb < maxmem) {
          lbool ret = genetic.main();
          return ret;
      }
  
      if (solver->conf.verbosity) {
          cout << "c [sls] would need "
               << std::setprecision(2) << std::fixed << mem_needed_mb
               << " MB but that's over limit of " << std::fixed << maxmem
               << " MB -- skipping" << endl;
      }
  
      return l_Undef;
  }
  
  #ifdef USE_YALSAT
  lbool SLS::run_yalsat()
  {
      Yalsat yalsat(solver);
      double mem_needed_mb = (double)approx_mem_needed()/(1000.0*1000.0);
      double maxmem = solver->conf.sls_memoutMB*solver->conf.var_and_mem_out_mult;
      if (mem_needed_mb < maxmem) {
          lbool ret = yalsat.main();
          return ret;
      }
  
      if (solver->conf.verbosity) {
          cout << "c [sls] would need "
          << std::setprecision(2) << std::fixed << mem_needed_mb
          << " MB but that's over limit of " << std::fixed << maxmem
          << " MB -- skipping" << endl;
      }
  
      return l_Undef;
  }
  #endif
  
  lbool SLS::run_ccnr(const uint32_t num_sls_called)
  {
      CMS_ccnr ccnr(solver);
      double mem_needed_mb = (double)approx_mem_needed()/(1000.0*1000.0);
      double maxmem = solver->conf.sls_memoutMB*solver->conf.var_and_mem_out_mult;
      if (mem_needed_mb < maxmem) {
          lbool ret = ccnr.main(num_sls_called);
          return ret;
      }
  
      if (solver->conf.verbosity) {
          cout << "c [sls] would need "
          << std::setprecision(2) << std::fixed << mem_needed_mb
          << " MB but that's over limit of " << std::fixed << maxmem
          << " MB -- skipping" << endl;
      }
  
      return l_Undef;
  }
  
  uint64_t SLS::approx_mem_needed()
  {
      uint32_t numvars = solver->nVars();
      uint32_t numclauses = solver->longIrredCls.size() + solver->binTri.irredBins;
      uint64_t numliterals = solver->litStats.irredLits + solver->binTri.irredBins*2;
      uint64_t needed = 0;
  
      //LIT storage (all clause data)
      needed += (solver->litStats.irredLits+solver->binTri.irredBins*2)*sizeof(Lit);
  
      //This is just an estimation of yalsat's memory needs.
  
      //clause
      needed += sizeof(Lit *) * numclauses;
      //clsize
      needed += sizeof(uint32_t) * numclauses;
  
      //false_cls
      needed += sizeof(uint32_t) * numclauses;
      //map_cl_to_false_cls
      needed += sizeof(uint32_t) * numclauses;
      //numtruelit
      needed += sizeof(uint32_t) * numclauses;
  
      //occurrence
      needed += sizeof(uint32_t *) * (2 * numvars);
      //numoccurrence
      needed += sizeof(uint32_t) * (2 * numvars);
      //assigns
      needed += sizeof(lbool) * numvars;
      //breakcount
      needed += sizeof(uint32_t) * numvars;
      //makecount
      needed += sizeof(uint32_t) * numvars;
  
      //occur_list_alloc
      needed += sizeof(uint32_t) * numliterals;
  
  
      return needed;
  }
  