ProofState_p parse_spec(CLState_p state,
IOFormat parse_format,
bool error_on_empty,
FunctionProperties free_symb_prop,
long* ax_no)
{
ProofState_p proofstate;
Scanner_p in;
int i;
StrTree_p skip_includes = NULL;
long parsed_ax_no;
proofstate = ProofStateAlloc(free_symb_prop);
for(i=0; state->argv[i]; i++)
{
in = CreateScanner(StreamTypeFile, state->argv[i], true, NULL);
ScannerSetFormat(in, parse_format);
FormulaAndClauseSetParse(in, proofstate->axioms,
proofstate->f_axioms,
proofstate->original_terms,
NULL,
&skip_includes);
CheckInpTok(in, NoToken);
DestroyScanner(in);
}
VERBOUT2("Specification read\n");
parsed_ax_no = ProofStateAxNo(proofstate);
if(error_on_empty && (parsed_ax_no == 0))
{
#ifdef PRINT_SOMEERRORS_STDOUT
fprintf(GlobalOut, "# Error: Input file contains no clauses or formulas\n");
TSTPOUT(GlobalOut, "InputError");
#endif
Error("Input file contains no clauses or formulas", OTHER_ERROR);
}
*ax_no = parsed_ax_no;
return proofstate;
}
void* SecureMalloc(size_t size)
{
void* handle;
#ifdef CLB_MEMORY_DEBUG
secure_malloc_count++;
secure_malloc_mem += size;
#endif
handle = (void*)malloc(size);
if(!handle)
{ /* malloc has no memory left */
MemIsLow = true;
MemFlushFreeList(); /* Return own freelist */
handle = (void*)malloc(size);
if(!handle)
{ /* Still nothing...*/
#ifdef PRINT_SOMEERRORS_STDOUT
SetMemoryLimit(RLIM_INFINITY);
fprintf(stdout, "# Failure: Resource limit exceeded (memory)\n");
TSTPOUT(stdout, "ResourceOut");
fflush(stdout);
PrintRusage(stdout);
#endif
Error("Out of Memory", OUT_OF_MEMORY);
}
}
#ifdef CLB_MEMORY_DEBUG2
printf("\nBlock %p M: %zd\n", handle, size);
#endif
return handle;
}
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;
}