Exemple #1
0
void ProofStateResetProcessedSet(ProofState_p state,  
                                 ProofControl_p control, 
                                 ClauseSet_p set)
{
   Clause_p handle;
   
   while((handle = ClauseSetExtractFirst(set)))
   {
      if(ClauseQueryProp(handle, CPIsGlobalIndexed))
      {
         GlobalIndicesDeleteClause(&(state->gindices), handle);
      }

      ClauseKillChildren(handle); /* Should be none, but better be safe */

      if(BuildProofObject)
      {
         Clause_p tmpclause = ClauseFlatCopy(handle);
         ClausePushDerivation(tmpclause, DCCnfQuote, handle, NULL);
         ClauseSetInsert(state->archive, handle);
         handle = tmpclause;
      }     
      HCBClauseEvaluate(control->hcb, handle);
      ClauseDelProp(handle, CPIsOriented);
      DocClauseQuoteDefault(6, handle, "move_eval");
      
      if(control->heuristic_parms.prefer_initial_clauses)
      {
	 EvalListChangePriority(handle->evaluations, -PrioLargestReasonable);
      }      
      ClauseSetInsert(state->unprocessed, handle);
   }
}
Exemple #2
0
void document_processing(Clause_p clause)
{
   if(OutputLevel)
   {
      if(OutputLevel == 1)
      {
	 putc('\n', GlobalOut);
	 putc('#', GlobalOut);
	 ClausePrint(GlobalOut, clause, true);
	 putc('\n', GlobalOut);
      }
      DocClauseQuoteDefault(6, clause, "new_given");
   }
}
Exemple #3
0
int main(int argc, char* argv[])
{
   int              retval = NO_ERROR;
   CLState_p        state;
   ProofState_p     proofstate;
   ProofControl_p   proofcontrol;
   Clause_p         success = NULL, 
                    filter_success;
   bool             out_of_clauses;
   char             *finals_state = "exists",
                    *sat_status = "Derivation";
   long             raw_clause_no,
                    preproc_removed=0, 
                    neg_conjectures,
                    parsed_ax_no,
                    relevancy_pruned = 0;
   double           preproc_time;

   assert(argv[0]);

   pid = getpid();
   InitIO(NAME);
#ifdef STACK_SIZE
   IncreaseMaxStackSize(argv, STACK_SIZE);
#endif
   ESignalSetup(SIGXCPU);

   h_parms = HeuristicParmsAlloc();
   fvi_parms = FVIndexParmsAlloc();   
   wfcb_definitions = PStackAlloc();
   hcb_definitions = PStackAlloc();

   state = process_options(argc, argv);
  
   OpenGlobalOut(outname);
   print_info();


   if(state->argc ==  0)
   {
      CLStateInsertArg(state, "-");
   }

   proofstate = parse_spec(state, parse_format, 
                           error_on_empty, free_symb_prop,
                           &parsed_ax_no);  


   relevancy_pruned += ProofStateSinE(proofstate, sine);
   relevancy_pruned += ProofStatePreprocess(proofstate, relevance_prune_level);

   if(strategy_scheduling)
   {
      ExecuteSchedule(StratSchedule, h_parms, print_rusage);
   }

   FormulaSetDocInital(GlobalOut, OutputLevel, proofstate->f_axioms);
   ClauseSetDocInital(GlobalOut, OutputLevel, proofstate->axioms);

   if(prune_only)
   {
      fprintf(GlobalOut, "\n# Pruning successful!\n");	    
      TSTPOUT(GlobalOut, "Unknown");
      goto cleanup1;
   }

   if(relevancy_pruned || incomplete)
   {
      proofstate->state_is_complete = false;
   }
   if(BuildProofObject)
   {
      FormulaSetArchive(proofstate->f_axioms, proofstate->f_ax_archive);
   }   
   if((neg_conjectures =
       FormulaSetPreprocConjectures(proofstate->f_axioms, 
                                    proofstate->f_ax_archive,
                                    answer_limit>0, 
                                    conjectures_are_questions)))
   {
      VERBOUT("Negated conjectures.\n");
   }
   if(FormulaSetCNF(proofstate->f_axioms,
                    proofstate->f_ax_archive,
                    proofstate->axioms, 
                    proofstate->original_terms, 
                    proofstate->freshvars,
                    proofstate->gc_original_terms))
   {
      VERBOUT("CNFization done\n");
   }
   ProofStateInitWatchlist(proofstate, watchlist_filename, parse_format);
   raw_clause_no = proofstate->axioms->members;   
   if(!no_preproc)
   {
      if(BuildProofObject)
      {
         ClauseSetArchive(proofstate->ax_archive, proofstate->axioms);
         if(proofstate->watchlist)
         {
            ClauseSetArchive(proofstate->ax_archive, proofstate->watchlist);
         }
      }
      preproc_removed = ClauseSetPreprocess(proofstate->axioms,
					    proofstate->watchlist,
                                            proofstate->archive,
					    proofstate->tmp_terms,
					    eqdef_incrlimit, 
                                            eqdef_maxclauses);
   }

   proofcontrol = ProofControlAlloc();
   ProofControlInit(proofstate, proofcontrol, h_parms, 
                    fvi_parms, wfcb_definitions, hcb_definitions);
   PCLFullTerms = pcl_full_terms; /* Preprocessing always uses full
				     terms, so we set the flag for
				     the main proof search only now! */
   ProofStateInit(proofstate, proofcontrol);

   VERBOUT2("Prover state initialized\n");   
   preproc_time = GetTotalCPUTime();
   if(print_rusage)
   {
      fprintf(GlobalOut, "# Preprocessing time       : %.3f s\n", preproc_time);
   }
   if(proofcontrol->heuristic_parms.presat_interreduction)
   {
      LiteralSelectionFun sel_strat = 
         proofcontrol->heuristic_parms.selection_strategy;

      proofcontrol->heuristic_parms.selection_strategy = SelectNoGeneration;
      success = Saturate(proofstate, proofcontrol, LONG_MAX,
                         LONG_MAX, LONG_MAX, LONG_MAX, LONG_MAX);
      fprintf(GlobalOut, "# Presaturation interreduction done\n");
      proofcontrol->heuristic_parms.selection_strategy = sel_strat;
      if(!success)
      {
         ProofStateResetProcessed(proofstate, proofcontrol);
      }
   }
   PERF_CTR_ENTRY(SatTimer);
   
   if(!success)
   {      
      success = Saturate(proofstate, proofcontrol, step_limit,
                         proc_limit, unproc_limit, total_limit, answer_limit);
   }
   PERF_CTR_EXIT(SatTimer);
   
   out_of_clauses = ClauseSetEmpty(proofstate->unprocessed);
   if(filter_sat)
   {
      filter_success = ProofStateFilterUnprocessed(proofstate,
						   proofcontrol,
						   filterdesc);
      if(filter_success)
      {
	 success = filter_success;
         PStackPushP(proofstate->extract_roots, success);
      }
   }
   
   if(success||proofstate->answer_count)
   {
      assert(!PStackEmpty(proofstate->extract_roots));
      if(success)
      {
         DocClauseQuoteDefault(2, success, "proof");
      }      
      fprintf(GlobalOut, "\n# Proof found!\n");
      if(!proofstate->status_reported)
      {
         TSTPOUT(GlobalOut, neg_conjectures?"Theorem":"Unsatisfiable");
         proofstate->status_reported = true;
         retval = PROOF_FOUND;
      }      
      if(BuildProofObject)
      {
         DerivationComputeAndPrint(GlobalOut,
                                   proofstate->extract_roots,
                                   proofstate->signature,
                                   proof_graph);
      }
   }
   else if(proofstate->watchlist && ClauseSetEmpty(proofstate->watchlist))
   {      
      ProofStatePropDocQuote(GlobalOut, OutputLevel, 
			     CPSubsumesWatch, proofstate, 
			     "final_subsumes_wl");
      fprintf(GlobalOut, "\n# Watchlist is empty!\n");
      TSTPOUT(GlobalOut, "ResourceOut"); 
      retval = RESOURCE_OUT;
   }
   else
   {
      if(out_of_clauses&&
	 proofstate->state_is_complete&&
	 (inf_sys_complete || assume_inf_sys_complete))
      {
	 finals_state = "final";
      }
      ProofStatePropDocQuote(GlobalOut, OutputLevel, CPIgnoreProps,
			     proofstate, finals_state);

      if(cnf_only)
      {
         fprintf(GlobalOut, "\n# CNFization successful!\n");	    
         TSTPOUT(GlobalOut, "Unknown");
      }
      else if(out_of_clauses)
      {
	 if(!(inf_sys_complete || assume_inf_sys_complete))
	 {
	    fprintf(GlobalOut, 
		    "\n# Clause set closed under "
		    "restricted calculus!\n");
            if(!SilentTimeOut)
            {
               TSTPOUT(GlobalOut, "GaveUp");
            }
            retval = INCOMPLETE_PROOFSTATE;
	 }
	 else if(proofstate->state_is_complete && inf_sys_complete)
	 {
	    fprintf(GlobalOut, "\n# No proof found!\n");
	    TSTPOUT(GlobalOut, neg_conjectures?"CounterSatisfiable":"Satisfiable");
            sat_status = "Saturation";
            retval = SATISFIABLE;
	 }
	 else
	 {
	    fprintf(GlobalOut, "\n# Failure: Out of unprocessed clauses!\n");	    
            if(!SilentTimeOut)
            {           
               TSTPOUT(GlobalOut, "GaveUp");	    
            }
            retval = INCOMPLETE_PROOFSTATE;
	 }
      }
      else 
      {
	 fprintf(GlobalOut, "\n# Failure: User resource limit exceeded!\n");
         if(!SilentTimeOut)
         {
            TSTPOUT(GlobalOut, "ResourceOut");
         }
         retval = RESOURCE_OUT;
      }
      if(BuildProofObject && 
         (retval!=INCOMPLETE_PROOFSTATE)&&
         (retval!=RESOURCE_OUT))
      {
         ClauseSetPushClauses(proofstate->extract_roots, 
                              proofstate->processed_pos_rules);
         ClauseSetPushClauses(proofstate->extract_roots,
                              proofstate->processed_pos_eqns);
         ClauseSetPushClauses(proofstate->extract_roots,
                              proofstate->processed_neg_units);
         ClauseSetPushClauses(proofstate->extract_roots,
                              proofstate->processed_non_units);
         if(cnf_only)
         {
            ClauseSetPushClauses(proofstate->extract_roots, 
                                 proofstate->unprocessed);
            print_sat = false;
         }
         DerivationComputeAndPrint(GlobalOut,
                                   proofstate->extract_roots,
                                   proofstate->signature,
                                   proof_graph);
      }

   }
   /* ClauseSetDerivationStackStatistics(proofstate->unprocessed); */
   if(print_sat)
   {
      if(proofstate->non_redundant_deleted)
      {
	 fprintf(GlobalOut, "\n# Saturated system is incomplete!\n");
      }
      if(success)
      {
	 fprintf(GlobalOut, "# Saturated system contains the empty clause:\n");
	 ClausePrint(GlobalOut, success, true);
	 fputc('\n',GlobalOut);	 
	 fputc('\n',GlobalOut);	 
      }
      ProofStatePrintSelective(GlobalOut, proofstate, outdesc,
			       outinfo);
      fprintf(GlobalOut, "\n");
   }	 
   
   if(success)
   {
      ClauseFree(success);
   }
   fflush(GlobalOut);

   print_proof_stats(proofstate,
                     parsed_ax_no, 
                     relevancy_pruned, 
                     raw_clause_no, 
                     preproc_removed);
#ifndef FAST_EXIT
#ifdef FULL_MEM_STATS
   fprintf(GlobalOut,
	   "# sizeof TermCell     : %ld\n"
	   "# sizeof EqnCell      : %ld\n"
	   "# sizeof ClauseCell   : %ld\n"
	   "# sizeof PTreeCell    : %ld\n"
	   "# sizeof PDTNodeCell  : %ld\n"
	   "# sizeof EvalCell     : %ld\n"
	   "# sizeof ClausePosCell: %ld\n"
	   "# sizeof PDArrayCell  : %ld\n",
	   sizeof(TermCell),
	   sizeof(EqnCell),
	   sizeof(ClauseCell),
	   sizeof(PTreeCell),
	   sizeof(PDTNodeCell),
	   sizeof(EvalCell),
	   sizeof(ClausePosCell),
	   sizeof(PDArrayCell));	
   fprintf(GlobalOut, "# Estimated memory usage: %ld\n",
	   ProofStateStorage(proofstate));
   MemFreeListPrint(GlobalOut);
#endif
   ProofControlFree(proofcontrol);
#endif
cleanup1:
#ifndef FAST_EXIT
   ProofStateFree(proofstate);
   CLStateFree(state);
   PStackFree(hcb_definitions);
   PStackFree(wfcb_definitions);
   FVIndexParmsFree(fvi_parms);
   HeuristicParmsFree(h_parms);
#ifdef FULL_MEM_STATS
   MemFreeListPrint(GlobalOut);
#endif
#endif
   if(print_rusage && !SilentTimeOut)
   {
      PrintRusage(GlobalOut);
   }
#ifdef CLB_MEMORY_DEBUG
   RegMemCleanUp();
   MemFlushFreeList();
   MemDebugPrintStats(stdout);
#endif
   OutClose(GlobalOut);
   return retval;
}
Exemple #4
0
static Clause_p insert_new_clauses(ProofState_p state, ProofControl_p control)
{
   Clause_p handle;
   long     clause_count;

   state->generated_count+=state->tmp_store->members;	 
   state->generated_lit_count+=state->tmp_store->literals;
   while((handle = ClauseSetExtractFirst(state->tmp_store)))
   {
      /* printf("Inserting: ");
         ClausePrint(stdout, handle, true);
         printf("\n"); */
      if(ClauseQueryProp(handle,CPIsIRVictim))
      {         
         assert(ClauseQueryProp(handle, CPLimitedRW));
         ForwardModifyClause(state, control, handle, 
                             control->heuristic_parms.forward_context_sr_aggressive||
                             (control->heuristic_parms.backward_context_sr&&
                              ClauseQueryProp(handle,CPIsProcessed)),
                             control->heuristic_parms.condensing_aggressive,
                             FullRewrite);
         ClauseDelProp(handle,CPIsIRVictim);
      }
      ForwardModifyClause(state, control, handle, 
			  control->heuristic_parms.forward_context_sr_aggressive||
			  (control->heuristic_parms.backward_context_sr&&
			   ClauseQueryProp(handle,CPIsProcessed)),
                          control->heuristic_parms.condensing_aggressive,
			  control->heuristic_parms.forward_demod);


      if(ClauseIsTrivial(handle))
      {
	 assert(!handle->children);
	 ClauseDetachParents(handle);
	 ClauseFree(handle);
	 continue;
      }
      if(state->watchlist)
      {
	 check_watchlist(&(state->wlindices), state->watchlist, 
                         handle, state->archive);
      }
      if(ClauseIsEmpty(handle))
      {
	 return handle;	 
      }
      if(control->heuristic_parms.er_aggressive &&
	 control->heuristic_parms.er_varlit_destructive &&
	 (clause_count = 
          ClauseERNormalizeVar(state->terms,
                               handle,
                               state->tmp_store,
                               state->freshvars,
                               control->heuristic_parms.er_strong_destructive)))
      {
	 state->other_redundant_count += clause_count;
	 state->resolv_count += clause_count;
	 state->generated_count += clause_count;
	 continue;
      }
      if(control->heuristic_parms.split_aggressive &&
	 (clause_count = ControlledClauseSplit(state->definition_store,
                                               handle,
					       state->tmp_store,
					       control->heuristic_parms.split_clauses,
					       control->heuristic_parms.split_method,
                                               control->heuristic_parms.split_fresh_defs)))
      {
	 state->generated_count += clause_count;
	 continue;
      }
      state->non_trivial_generated_count++;
      ClauseDelProp(handle, CPIsOriented);
      if(!control->heuristic_parms.select_on_proc_only)
      {
	 DoLiteralSelection(control, handle); 
      }
      else
      {
	 EqnListDelProp(handle->literals, EPIsSelected);
      }
      handle->create_date = state->proc_non_trivial_count;
      HCBClauseEvaluate(control->hcb, handle);
      ClauseDelProp(handle, CPIsOriented);
      DocClauseQuoteDefault(6, handle, "eval");
      
      ClauseSetInsert(state->unprocessed, handle);
   }
   return NULL;
}