ltlfilt.cc 15.9 KB
Newer Older
1
// -*- coding: utf-8 -*-
2
// Copyright (C) 2012, 2013 Laboratoire de Recherche et Développement de
3
4
5
6
7
8
// l'Epita (LRDE).
//
// This file is part of Spot, a model checking library.
//
// Spot is free software; you can redistribute it and/or modify it
// 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
11
12
13
14
15
16
17
// (at your option) any later version.
//
// Spot is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
// License for more details.
//
// 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
#include "common_sys.hh"
21
22
23
24
25
26

#include <cstdlib>
#include <string>
#include <iostream>
#include <fstream>
#include <argp.h>
27
#include <cstring>
28
#include "error.h"
29

30
#include "common_setup.hh"
31
#include "common_finput.hh"
32
#include "common_output.hh"
33
#include "common_cout.hh"
34
#include "common_r.hh"
35

36
37
38
#include "misc/hash.hh"
#include "ltlvisit/simplify.hh"
#include "ltlvisit/length.hh"
39
#include "ltlvisit/relabel.hh"
40
#include "ltlvisit/wmunabbrev.hh"
41
#include "ltlvisit/remove_x.hh"
42
#include "ltlast/unop.hh"
43
#include "ltlast/multop.hh"
44
45
46
47
48
#include "tgbaalgos/ltl2tgba_fm.hh"
#include "tgbaalgos/minimize.hh"
#include "tgbaalgos/safety.hh"

const char argp_program_doc[] ="\
49
50
51
Read a list of formulas and output them back after some optional processing.\v\
Exit status:\n\
  0  if some formulas were output (skipped syntax errors do not count)\n\
52
  1  if no formulas were output (no match)\n\
53
  2  if any error has been reported";
54

55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
#define OPT_SKIP_ERRORS 2
#define OPT_DROP_ERRORS 3
#define OPT_NNF 4
#define OPT_LTL 5
#define OPT_NOX 7
#define OPT_BOOLEAN 8
#define OPT_EVENTUAL 9
#define OPT_UNIVERSAL 10
#define OPT_SYNTACTIC_SAFETY 11
#define OPT_SYNTACTIC_GUARANTEE 12
#define OPT_SYNTACTIC_OBLIGATION 13
#define OPT_SYNTACTIC_RECURRENCE 14
#define OPT_SYNTACTIC_PERSISTENCE 15
#define OPT_SAFETY 16
#define OPT_GUARANTEE 17
#define OPT_OBLIGATION 18
#define OPT_SIZE_MIN 19
#define OPT_SIZE_MAX 20
#define OPT_BSIZE_MIN 21
#define OPT_BSIZE_MAX 22
#define OPT_IMPLIED_BY 23
#define OPT_IMPLY 24
#define OPT_EQUIVALENT_TO 25
78
79
#define OPT_RELABEL 26
#define OPT_REMOVE_WM 27
80
#define OPT_BOOLEAN_TO_ISOP 28
81
82
#define OPT_REMOVE_X 29
#define OPT_STUTTER_INSENSITIVE 30
83
84
85
86
87
88
89
90
91
92
93
94
95
96

static const argp_option options[] =
  {
    /**************************************************/
    { 0, 0, 0, 0, "Error handling:", 2 },
    { "skip-errors", OPT_SKIP_ERRORS, 0, 0,
      "output erroneous lines as-is without processing", 0 },
    { "drop-errors", OPT_DROP_ERRORS, 0, 0,
      "discard erroneous lines (default)", 0 },
    { "quiet", 'q', 0, 0, "do not report syntax errors", 0 },
    /**************************************************/
    { 0, 0, 0, 0, "Transformation options:", 3 },
    { "negate", 'n', 0, 0, "negate each formula", 0 },
    { "nnf", OPT_NNF, 0, 0, "rewrite formulas in negative normal form", 0 },
97
98
99
    { "relabel", OPT_RELABEL, "abc|pnn", OPTION_ARG_OPTIONAL,
      "relabel all atomic propositions, alphabetically unless " \
      "specified otherwise", 0 },
100
101
    { "remove-wm", OPT_REMOVE_WM, 0, 0,
      "rewrite operators W and M using U and R", 0 },
102
103
104
    { "boolean-to-isop", OPT_BOOLEAN_TO_ISOP, 0, 0,
      "rewrite Boolean subformulas as irredundant sum of products "
      "(implies at least -r1)", 0 },
105
106
107
    { "remove-x", OPT_REMOVE_X, 0, 0,
      "remove X operators (valid only for stutter-insensitive properties)",
      0 },
108
109
    DECLARE_OPT_R,
    LEVEL_DOC(4),
110
111
112
    /**************************************************/
    { 0, 0, 0, 0,
      "Filtering options (matching is done after transformation):", 5 },
113
    { "ltl", OPT_LTL, 0, 0, "match only LTL formulas (no PSL operator)", 0 },
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
    { "nox", OPT_NOX, 0, 0, "match X-free formulas", 0 },
    { "boolean", OPT_BOOLEAN, 0, 0, "match Boolean formulas", 0 },
    { "eventual", OPT_EVENTUAL, 0, 0, "match pure eventualities", 0 },
    { "universal", OPT_UNIVERSAL, 0, 0, "match purely universal formulas", 0 },
    { "syntactic-safety", OPT_SYNTACTIC_SAFETY, 0, 0,
      "match syntactic-safety formulas", 0 },
    { "syntactic-guarantee", OPT_SYNTACTIC_GUARANTEE, 0, 0,
      "match syntactic-guarantee formulas", 0 },
    { "syntactic-obligation", OPT_SYNTACTIC_OBLIGATION, 0, 0,
      "match syntactic-obligation formulas", 0 },
    { "syntactic-recurrence", OPT_SYNTACTIC_RECURRENCE, 0, 0,
      "match syntactic-recurrence formulas", 0 },
    { "syntactic-persistence", OPT_SYNTACTIC_PERSISTENCE, 0, 0,
      "match syntactic-persistence formulas", 0 },
    { "safety", OPT_SAFETY, 0, 0,
      "match safety formulas (even pathological)", 0 },
    { "guarantee", OPT_GUARANTEE, 0, 0,
      "match guarantee formulas (even pathological)", 0 },
    { "obligation", OPT_OBLIGATION, 0, 0,
      "match obligation formulas (even pathological)", 0 },
    { "size-max", OPT_SIZE_MAX, "INT", 0,
      "match formulas with size <= INT", 0 },
    { "size-min", OPT_SIZE_MIN, "INT", 0,
      "match formulas with size >= INT", 0 },
    { "bsize-max", OPT_BSIZE_MAX, "INT", 0,
      "match formulas with Boolean size <= INT", 0 },
    { "bsize-min", OPT_BSIZE_MIN, "INT", 0,
      "match formulas with Boolean size >= INT", 0 },
142
143
144
145
146
147
    { "implied-by", OPT_IMPLIED_BY, "FORMULA", 0,
      "match formulas implied by FORMULA", 0 },
    { "imply", OPT_IMPLY, "FORMULA", 0,
      "match formulas implying FORMULA", 0 },
    { "equivalent-to", OPT_EQUIVALENT_TO, "FORMULA", 0,
      "match formulas equivalent to FORMULA", 0 },
148
149
150
    { "stutter-insensitive", OPT_STUTTER_INSENSITIVE, 0, 0,
      "match stutter-insensitive LTL formulas", 0 },
    { "stutter-invariant", 0, 0, OPTION_ALIAS, 0, 0 },
151
152
153
    { "invert-match", 'v', 0, 0, "select non-matching formulas", 0},
    { "unique", 'u', 0, 0,
      "drop formulas that have already been output (not affected by -v)", 0 },
154
    /**************************************************/
155
    { 0, 0, 0, 0, "Output options:", -20 },
156
157
158
159
    { 0, 0, 0, 0, "Miscellaneous options:", -1 },
    { 0, 0, 0, 0, 0, 0 }
  };

160
161
const struct argp_child children[] =
  {
162
    { &finput_argp, 0, 0, 1 },
163
    { &output_argp, 0, 0, -20 },
164
    { &misc_argp, 0, 0, -1 },
165
166
167
    { 0, 0, 0, 0 }
  };

168
169
static bool one_match = false;

170
171
172
173
174
enum error_style_t { drop_errors, skip_errors };
static error_style_t error_style = drop_errors;
static bool quiet = false;
static bool nnf = false;
static bool negate = false;
175
static bool boolean_to_isop = false;
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
static bool unique = false;
static bool psl = false;
static bool ltl = false;
static bool nox = false;
static bool invert = false;
static bool boolean = false;
static bool universal = false;
static bool eventual = false;
static bool syntactic_safety = false;
static bool syntactic_guarantee = false;
static bool syntactic_obligation = false;
static bool syntactic_recurrence = false;
static bool syntactic_persistence = false;
static bool safety = false;
static bool guarantee = false;
static bool obligation = false;
static int size_min = -1;
static int size_max = -1;
static int bsize_min = -1;
static int bsize_max = -1;
196
197
static bool relabeling = false;
static spot::ltl::relabeling_style style = spot::ltl::Abc;
198
static bool remove_wm = false;
199
200
static bool remove_x = false;
static bool stutter_insensitive = false;
201

202
203
204
205
static const spot::ltl::formula* implied_by = 0;
static const spot::ltl::formula* imply = 0;
static const spot::ltl::formula* equivalent_to = 0;

206
207
208
209
210
211
static int
to_int(const char* s)
{
  char* endptr;
  int res = strtol(s, &endptr, 10);
  if (*endptr)
212
    error(2, 0, "failed to parse '%s' as an integer.", s);
213
214
215
  return res;
}

216
217
218
219
220

static const spot::ltl::formula*
parse_formula_arg(const std::string& input)
{
  spot::ltl::parse_error_list pel;
221
  const spot::ltl::formula* f = parse_formula(input, pel);
222
  if (spot::ltl::format_parse_errors(std::cerr, input, pel))
223
    error(2, 0, "parse error when parsing an argument");
224
225
226
227
228
  return f;
}



229
static int
230
parse_opt(int key, char* arg, struct argp_state*)
231
232
233
234
235
236
237
238
239
240
{
  // This switch is alphabetically-ordered.
  switch (key)
    {
    case 'n':
      negate = true;
      break;
    case 'q':
      quiet = true;
      break;
241
242
    case OPT_R:
      parse_r(arg);
243
244
245
246
247
248
249
250
251
252
253
254
255
256
      break;
    case 'u':
      unique = true;
      break;
    case 'v':
      invert = true;
      break;
    case ARGP_KEY_ARG:
      // FIXME: use stat() to distinguish filename from string?
      jobs.push_back(job(arg, true));
      break;
    case OPT_BOOLEAN:
      boolean = true;
      break;
257
258
259
    case OPT_BOOLEAN_TO_ISOP:
      boolean_to_isop = true;
      break;
260
261
262
263
264
265
266
267
268
    case OPT_BSIZE_MIN:
      bsize_min = to_int(arg);
      break;
    case OPT_BSIZE_MAX:
      bsize_max = to_int(arg);
      break;
    case OPT_DROP_ERRORS:
      error_style = drop_errors;
      break;
269
270
271
272
273
274
275
    case OPT_EQUIVALENT_TO:
      {
	if (equivalent_to)
	  error(2, 0, "only one --equivalent-to option can be given");
	equivalent_to = parse_formula_arg(arg);
	break;
      }
276
277
278
    case OPT_GUARANTEE:
      guarantee = obligation = true;
      break;
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
    case OPT_IMPLIED_BY:
      {
	const spot::ltl::formula* i = parse_formula_arg(arg);
	// a→c∧b→c ≡ (a∨b)→c
	implied_by =
	  spot::ltl::multop::instance(spot::ltl::multop::Or, implied_by, i);
	break;
      }
    case OPT_IMPLY:
      {
	// a→b∧a→c ≡ a→(b∧c)
	const spot::ltl::formula* i = parse_formula_arg(arg);
	imply =
	  spot::ltl::multop::instance(spot::ltl::multop::And, imply, i);
	break;
      }
295
296
297
298
299
300
301
302
303
304
305
306
    case OPT_LTL:
      ltl = true;
      break;
    case OPT_NNF:
      nnf = true;
      break;
    case OPT_NOX:
      nox = true;
      break;
    case OPT_OBLIGATION:
      obligation = true;
      break;
307
308
309
310
311
312
313
314
315
    case OPT_RELABEL:
      relabeling = true;
      if (!arg || !strncasecmp(arg, "abc", 6))
	style = spot::ltl::Abc;
      else if (!strncasecmp(arg, "pnn", 4))
	style = spot::ltl::Pnn;
      else
	error(2, 0, "invalid argument for --relabel: '%s'", arg);
      break;
316
317
318
    case OPT_REMOVE_WM:
      remove_wm = true;
      break;
319
320
321
    case OPT_REMOVE_X:
      remove_x = true;
      break;
322
323
324
325
326
327
328
329
330
331
332
333
    case OPT_SAFETY:
      safety = obligation = true;
      break;
    case OPT_SIZE_MIN:
      size_min = to_int(arg);
      break;
    case OPT_SIZE_MAX:
      size_max = to_int(arg);
      break;
    case OPT_SKIP_ERRORS:
      error_style = skip_errors;
      break;
334
335
336
    case OPT_STUTTER_INSENSITIVE:
      stutter_insensitive = true;
      break;
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
    case OPT_SYNTACTIC_SAFETY:
      syntactic_safety = true;
      break;
    case OPT_SYNTACTIC_GUARANTEE:
      syntactic_guarantee = true;
      break;
    case OPT_SYNTACTIC_OBLIGATION:
      syntactic_obligation = true;
      break;
    case OPT_SYNTACTIC_RECURRENCE:
      syntactic_recurrence = true;
      break;
    case OPT_SYNTACTIC_PERSISTENCE:
      syntactic_persistence = true;
      break;
    default:
      return ARGP_ERR_UNKNOWN;
    }
  return 0;
}

typedef Sgi::hash_set<const spot::ltl::formula*,
		      const spot::ptr_hash<const spot::ltl::formula> > fset_t;

namespace
{
363
  class ltl_processor: public job_processor
364
365
366
367
368
  {
  public:
    spot::ltl::ltl_simplifier& simpl;
    fset_t unique_set;

369
370
371
372
373
    ~ltl_processor()
    {
      fset_t::iterator i = unique_set.begin();
      while (i != unique_set.end())
	(*i++)->destroy();
374
375
376
377
378
379
380

      if (equivalent_to)
	equivalent_to->destroy();
      if (implied_by)
	implied_by->destroy();
      if (imply)
	imply->destroy();
381
382
    }

383
384
385
386
387
388
    ltl_processor(spot::ltl::ltl_simplifier& simpl)
    : simpl(simpl)
    {
    }

    int
389
    process_string(const std::string& input,
390
391
392
		    const char* filename = 0, int linenum = 0)
    {
      spot::ltl::parse_error_list pel;
393
      const spot::ltl::formula* f = parse_formula(input, pel);
394
395
396
397
398
399

      if (!f || pel.size() > 0)
	  {
	    if (!quiet)
	      {
		if (filename)
400
		  error_at_line(0, 0, filename, linenum, "parse error:");
401
402
403
404
405
406
407
		spot::ltl::format_parse_errors(std::cerr, input, pel);
	      }

	    if (f)
	      f->destroy();

	    if (error_style == skip_errors)
408
409
410
	      std::cout << input << std::endl;
	    else
	      assert(error_style == drop_errors);
411
	    check_cout();
412
	    return !quiet;
413
	  }
414
415
      return process_formula(f, filename, linenum);
    }
416

417
418
419
420
    int
    process_formula(const spot::ltl::formula* f,
		    const char* filename = 0, int linenum = 0)
    {
421
      if (negate)
422
	f = spot::ltl::unop::instance(spot::ltl::unop::Not, f);
423

424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
      if (remove_x)
	{
	  // If simplification are enabled, we do them before and after.
	  if (simplification_level)
	    {
	      const spot::ltl::formula* res = simpl.simplify(f);
	      f->destroy();
	      f = res;
	    }

	  const spot::ltl::formula* res = spot::ltl::remove_x(f);
	  f->destroy();
	  f = res;
	}

439
      if (simplification_level || boolean_to_isop)
440
441
442
443
444
445
446
447
448
449
450
451
452
	{
	  const spot::ltl::formula* res = simpl.simplify(f);
	  f->destroy();
	  f = res;
	}

      if (nnf)
	{
	  const spot::ltl::formula* res = simpl.negative_normal_form(f);
	  f->destroy();
	  f = res;
	}

453
454
      if (relabeling)
	{
455
456
457
458
459
460
461
462
	  const spot::ltl::formula* res = spot::ltl::relabel(f, style);
	  f->destroy();
	  f = res;
	}

      if (remove_wm)
	{
	  const spot::ltl::formula* res = spot::ltl::unabbreviate_wm(f);
463
464
465
466
	  f->destroy();
	  f = res;
	}

467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
      bool matched = true;

      matched &= !ltl || f->is_ltl_formula();
      matched &= !psl || f->is_psl_formula();
      matched &= !nox || f->is_X_free();
      matched &= !boolean || f->is_boolean();
      matched &= !universal || f->is_universal();
      matched &= !eventual || f->is_eventual();
      matched &= !syntactic_safety || f->is_syntactic_safety();
      matched &= !syntactic_guarantee || f->is_syntactic_guarantee();
      matched &= !syntactic_obligation || f->is_syntactic_obligation();
      matched &= !syntactic_recurrence || f->is_syntactic_recurrence();
      matched &= !syntactic_persistence || f->is_syntactic_persistence();

      if (matched && (size_min > 0 || size_max >= 0))
	{
	  int l = spot::ltl::length(f);
	  matched &= (size_min <= 0) || (l >= size_min);
	  matched &= (size_max < 0) || (l <= size_max);
	}

      if (matched && (bsize_min > 0 || bsize_max >= 0))
	{
	  int l = spot::ltl::length_boolone(f);
	  matched &= (bsize_min <= 0) || (l >= bsize_min);
	  matched &= (bsize_max < 0) || (l <= bsize_max);
	}

495
496
497
      matched &= !implied_by || simpl.implication(implied_by, f);
      matched &= !imply || simpl.implication(f, imply);
      matched &= !equivalent_to || simpl.are_equivalent(f, equivalent_to);
498
      matched &= !stutter_insensitive || is_stutter_insensitive(f);
499

500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
      // Match obligations and subclasses using WDBA minimization.
      // Because this is costly, we compute it later, so that we don't
      // have to compute it on formulas that have been discarded for
      // other reasons.
      if (matched && obligation)
	{
	  spot::tgba* aut = ltl_to_tgba_fm(f, simpl.get_dict());
	  spot::tgba* min = minimize_obligation(aut, f);
	  assert(min);
	  if (aut == min)
	    {
	      // Not an obligation
	      matched = false;
	    }
	  else
	    {
	      matched &= !guarantee || is_guarantee_automaton(min);
	      matched &= !safety || is_safety_mwdba(min);
	      delete min;
	    }
	  delete aut;
	}

      matched ^= invert;

      if (unique)
	{
	  if (unique_set.insert(f).second)
	    f->clone();
	  else
	    matched = false;
	}

      if (matched)
	{
535
	  one_match = true;
536
	  output_formula(f, filename, linenum);
537
538
539
540
541
542
543
544
545
546
	}
      f->destroy();
      return 0;
    }
  };
}

int
main(int argc, char** argv)
{
547
  setup(argv);
548

549
  const argp ap = { options, parse_opt, "[FILENAME...]",
550
		    argp_program_doc, children, 0, 0 };
551

552
  if (int err = argp_parse(&ap, argc, argv, ARGP_NO_HELP, 0, 0))
553
554
555
556
557
    exit(err);

  if (jobs.empty())
    jobs.push_back(job("-", 1));

558
559
  // --stutter-insensitive implies --ltl
  ltl |= stutter_insensitive;
560
561
562
563
564
  if (boolean_to_isop && simplification_level == 0)
    simplification_level = 1;
  spot::ltl::ltl_simplifier_options opt = simplifier_options();
  opt.boolean_to_isop = boolean_to_isop;
  spot::ltl::ltl_simplifier simpl(opt);
565
566
567
568
  ltl_processor processor(simpl);
  if (processor.run())
    return 2;
  return one_match ? 0 : 1;
569
}