bin: allow %l to be used to print serial numbers

* NEWS: Mention it.
* bin/autfilt.cc, bin/common_aoutput.cc, bin/common_aoutput.hh,
bin/common_output.cc, bin/common_output.hh, bin/dstar2tgba.cc,
bin/genaut.cc, bin/genltl.cc, bin/ltl2tgba.cc, bin/ltldo.cc,
bin/ltlfilt.cc, bin/ltlgrind.cc, bin/randaut.cc, bin/randltl.cc:
Implement it.
* doc/org/oaut.org: Add a short example.
* tests/core/serial.test: New file.
* tests/Makefile.am: Add it.

NEWS

@@ -1,5 +1,17 @@
 New in spot 2.11.5.dev  (not yet released)
 
+  Command-line tools:
+
+  - In places that accept format strings with '%' sequences, like
+    options --stats, --name, or --output, the new '%l' can now be used
+    to produce the 0-based serial number of the produced object.  This
+    differs from the existing '%L' that is usually related to the line
+    number of the input (when that makes sense).  For instance to
+    split a file that contains many automaton into several files, one
+    per automata, do
+
+        autfilt input.hoa -o output-%l.hoa
+
   Library:
 
   - The following new trivial simplifications have been implemented for SEREs:

bin/autfilt.cc

@@ -1680,8 +1680,6 @@ namespace
             return 0;
         }
 
-      ++match_count;
-
       if (aliases)
         {
           if (opt_aliases)
@@ -1690,7 +1688,9 @@ namespace
             set_aliases(aut, {});
         }
       printer.print(aut, timer, nullptr, haut->filename.c_str(), -1,
-                    haut, prefix, suffix);
+                    match_count, haut, prefix, suffix);
+
+      ++match_count;
 
       if (opt_max_count >= 0 && match_count >= opt_max_count)
         abort_run = true;

bin/common_aoutput.cc

@@ -198,6 +198,8 @@ static const argp_option io_options[] =
       " minuscules for output):", 4 },
     { "%F", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE, F_doc, 0 },
     { "%L", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE, L_doc, 0 },
+    { "%l", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
+      "serial number of the output automaton (0-based)", 0 },
     { "%H, %h", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
       "the automaton in HOA format on a single line (use %[opt]H or %[opt]h "
       "to specify additional options as in --hoa=opt)", 0 },
@@ -269,6 +271,8 @@ static const argp_option o_options[] =
       "the following interpreted sequences:", 4 },
     { "%F", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE, F_doc, 0 },
     { "%L", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE, L_doc, 0 },
+    { "%l", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
+      "serial number of the output automaton (0-based)", 0 },
     { "%h", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
       "the automaton in HOA format on a single line (use %[opt]h "
       "to specify additional options as in --hoa=opt)", 0 },
@@ -442,6 +446,7 @@ hoa_stat_printer::hoa_stat_printer(std::ostream& os, const char* format,
   if (input != ltl_input)
     declare('f', &filename_);        // Override the formula printer.
   declare('h', &output_aut_);
+  declare('l', &index_);
   declare('m', &aut_name_);
   declare('u', &aut_univbranch_);
   declare('w', &aut_word_);
@@ -453,11 +458,12 @@ hoa_stat_printer::print(const spot::const_parsed_aut_ptr& haut,
                         const spot::const_twa_graph_ptr& aut,
                         spot::formula f,
                         const char* filename, int loc,
+                        unsigned index,
                         const spot::process_timer& ptimer,
                         const char* csv_prefix, const char* csv_suffix)
 {
   timer_ = ptimer;
-
+  index_ = index;
   filename_ = filename ? filename : "";
   csv_prefix_ = csv_prefix ? csv_prefix : "";
   csv_suffix_ = csv_suffix ? csv_suffix : "";
@@ -599,6 +605,7 @@ automaton_printer::print(const spot::twa_graph_ptr& aut,
                          // Input location for errors and statistics.
                          const char* filename,
                          int loc,
+                         unsigned index,
                          // input automaton for statistics
                          const spot::const_parsed_aut_ptr& haut,
                          const char* csv_prefix,
@@ -622,7 +629,8 @@ automaton_printer::print(const spot::twa_graph_ptr& aut,
   if (opt_name)
     {
       name.str("");
-      namer.print(haut, aut, f, filename, loc, ptimer, csv_prefix, csv_suffix);
+      namer.print(haut, aut, f, filename, loc, index,
+                  ptimer, csv_prefix, csv_suffix);
       aut->set_named_prop("automaton-name", new std::string(name.str()));
     }
 
@@ -630,8 +638,8 @@ automaton_printer::print(const spot::twa_graph_ptr& aut,
   if (opt_output)
     {
       outputname.str("");
-      outputnamer.print(haut, aut, f, filename, loc, ptimer,
+      outputnamer.print(haut, aut, f, filename, loc, index,
-                        csv_prefix, csv_suffix);
+                        ptimer, csv_prefix, csv_suffix);
       std::string fname = outputname.str();
       auto [it, b] = outputfiles.try_emplace(fname, nullptr);
       if (b)
@@ -660,8 +668,8 @@ automaton_printer::print(const spot::twa_graph_ptr& aut,
       break;
     case Stats:
       statistics.set_output(*out);
-      statistics.print(haut, aut, f, filename, loc, ptimer,
+      statistics.print(haut, aut, f, filename, loc, index,
-                       csv_prefix, csv_suffix) << '\n';
+                       ptimer, csv_prefix, csv_suffix) << '\n';
       break;
     }
   flush_cout();

bin/common_aoutput.hh

@@ -133,10 +133,10 @@ public:
   void print(std::ostream& os, const char* pos) const override;
 };
 
-/// \brief prints various statistics about a TGBA
+/// \brief prints various statistics about a TwA
 ///
 /// This object can be configured to display various statistics
-/// about a TGBA.  Some %-sequence of characters are interpreted in
+/// about a TwA.  Some %-sequence of characters are interpreted in
 /// the format string, and replaced by the corresponding statistics.
 class hoa_stat_printer: protected spot::stat_printer
 {
@@ -153,10 +153,12 @@ public:
   /// to be output.
   std::ostream&
     print(const spot::const_parsed_aut_ptr& haut,
-        const spot::const_twa_graph_ptr& aut,
+          const spot::const_twa_graph_ptr& aut,
-        spot::formula f,
+          spot::formula f,
-        const char* filename, int loc, const spot::process_timer& ptimer,
+          const char* filename, int loc,
-        const char* csv_prefix, const char* csv_suffix);
+          unsigned index,
+          const spot::process_timer& ptimer,
+          const char* csv_prefix, const char* csv_suffix);
 
 private:
   spot::printable_value<const char*> filename_;
@@ -165,6 +167,7 @@ private:
   spot::printable_value<std::string> aut_name_;
   spot::printable_value<std::string> aut_word_;
   spot::printable_value<std::string> haut_word_;
+  spot::printable_value<unsigned> index_;
   spot::printable_acc_cond haut_gen_acc_;
   spot::printable_size haut_states_;
   spot::printable_size haut_edges_;
@@ -206,6 +209,8 @@ public:
         // Input location for errors and statistics.
         const char* filename = nullptr,
         int loc = -1,
+        // serial numbner
+        unsigned index = 0,
         // Time and input automaton for statistics
         const spot::const_parsed_aut_ptr& haut = nullptr,
         const char* csv_prefix = nullptr,

bin/common_output.cc

@@ -160,6 +160,7 @@ namespace
     spot::formula f;
     const char* filename;
     const char* line;
+    unsigned index;
     const char* prefix;
     const char* suffix;
   };
@@ -237,6 +238,7 @@ namespace
       declare('R', &timer_);
       declare('r', &timer_);
       declare('L', &line_);
+      declare('l', &index_);
       declare('s', &size_);
       declare('h', &class_);
       declare('n', &nesting_);
@@ -248,7 +250,8 @@ namespace
     }
 
     std::ostream&
-    print(const formula_with_location& fl, spot::process_timer* ptimer)
+    print(const formula_with_location& fl,
+          spot::process_timer* ptimer)
     {
       if (has('R') || has('r'))
         timer_ = *ptimer;
@@ -256,6 +259,7 @@ namespace
       fl_ = &fl;
       filename_ = fl.filename ? fl.filename : "";
       line_ = fl.line;
+      index_ = fl.index;
       prefix_ = fl.prefix ? fl.prefix : "";
       suffix_ = fl.suffix ? fl.suffix : "";
       auto f = fl_.val()->f;
@@ -288,6 +292,7 @@ namespace
     printable_timer timer_;
     spot::printable_value<const char*> filename_;
     spot::printable_value<const char*> line_;
+    spot::printable_value<unsigned> index_;
     spot::printable_value<const char*> prefix_;
     spot::printable_value<const char*> suffix_;
     spot::printable_value<int> size_;
@@ -356,6 +361,7 @@ static void
 output_formula(std::ostream& out,
                spot::formula f, spot::process_timer* ptimer,
                const char* filename, const char* linenum,
+               unsigned index,
                const char* prefix, const char* suffix)
 {
   if (!format)
@@ -391,7 +397,8 @@ output_formula(std::ostream& out,
     }
   else
     {
-      formula_with_location fl = { f, filename, linenum, prefix, suffix };
+      formula_with_location fl = { f, filename, linenum,
+                                   index, prefix, suffix };
       format->print(fl, ptimer);
     }
 }
@@ -399,6 +406,7 @@ output_formula(std::ostream& out,
 void
 output_formula_checked(spot::formula f, spot::process_timer* ptimer,
                        const char* filename, const char* linenum,
+                       unsigned index,
                        const char* prefix, const char* suffix)
 {
   if (output_format == count_output)
@@ -414,7 +422,8 @@ output_formula_checked(spot::formula f, spot::process_timer* ptimer,
   if (outputnamer)
     {
       outputname.str("");
-      formula_with_location fl = { f, filename, linenum, prefix, suffix };
+      formula_with_location fl = { f, filename, linenum,
+                                   index, prefix, suffix };
       outputnamer->print(fl, ptimer);
       std::string fname = outputname.str();
       auto [it, b] = outputfiles.try_emplace(fname, nullptr);
@@ -422,7 +431,7 @@ output_formula_checked(spot::formula f, spot::process_timer* ptimer,
         it->second.reset(new output_file(fname.c_str()));
       out = &it->second->ostream();
     }
-  output_formula(*out, f, ptimer, filename, linenum, prefix, suffix);
+  output_formula(*out, f, ptimer, filename, linenum, index, prefix, suffix);
   *out << output_terminator;
   // Make sure we abort if we can't write to std::cout anymore
   // (like disk full or broken pipe with SIGPIPE ignored).
@@ -432,10 +441,12 @@ output_formula_checked(spot::formula f, spot::process_timer* ptimer,
 void output_formula_checked(spot::formula f,
                             spot::process_timer* ptimer,
                             const char* filename, int linenum,
+                            unsigned index,
                             const char* prefix,
                             const char* suffix)
 {
   output_formula_checked(f, ptimer, filename,
                          std::to_string(linenum).c_str(),
+                         index,
                          prefix, suffix);
 }

bin/common_output.hh

@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2012-2018 Laboratoire de Recherche et Développement
+// Copyright (C) 2012-2018, 2023 Laboratoire de Recherche et Développement
 // de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -81,11 +81,13 @@ void output_formula_checked(spot::formula f,
                             spot::process_timer* ptimer = nullptr,
                             const char* filename = nullptr,
                             const char* linenum = nullptr,
+                            unsigned output_index = 0U,
                             const char* prefix = nullptr,
                             const char* suffix = nullptr);
 
 void output_formula_checked(spot::formula f,
                             spot::process_timer* ptimer,
                             const char* filename, int linenum,
+                            unsigned output_index,
                             const char* prefix = nullptr,
                             const char* suffix = nullptr);

bin/dstar2tgba.cc

@@ -129,7 +129,9 @@ namespace
       timer.start();
       auto aut = post.run(haut->aut, nullptr);
       timer.stop();
-      printer.print(aut, timer, nullptr, haut->filename.c_str(), -1, haut);
+      static unsigned index = 0;
+      printer.print(aut, timer, nullptr, haut->filename.c_str(), -1,
+                    index++, haut);
       flush_cout();
       return 0;
     }

bin/genaut.cc

@@ -122,7 +122,8 @@ output_pattern(gen::aut_pattern_id pattern, int n)
   twa_graph_ptr aut = spot::gen::aut_pattern(pattern, n);
   timer.stop();
   automaton_printer printer;
-  printer.print(aut, timer, nullptr, aut_pattern_name(pattern), n);
+  static unsigned serial = 0;
+  printer.print(aut, timer, nullptr, aut_pattern_name(pattern), n, serial++);
 }
 
 static void

bin/genltl.cc

@@ -192,6 +192,8 @@ static const argp_option options[] =
       "the formula (in the selected syntax)", 0 },
     { "%F", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
       "the name of the pattern", 0 },
+    { "%l", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
+      "serial number of the output formula (0-based)", 0 },
     { "%L", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
       "the argument of the pattern", 0 },
     { "%%", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
@@ -287,6 +289,8 @@ parse_opt(int key, char* arg, struct argp_state*)
 }
 
 
+static unsigned output_count = 0U;
+
 static void
 output_pattern(gen::ltl_pattern_id pattern, int n, int n2)
 {
@@ -303,14 +307,14 @@ output_pattern(gen::ltl_pattern_id pattern, int n, int n2)
   if (opt_positive || !opt_negative)
     {
       output_formula_checked(f, nullptr, gen::ltl_pattern_name(pattern),
-                             args.c_str());
+                             args.c_str(), output_count++);
     }
   if (opt_negative)
     {
       std::string tmp = "!";
       tmp += gen::ltl_pattern_name(pattern);
       output_formula_checked(formula::Not(f), nullptr, tmp.c_str(),
-                             args.c_str());
+                             args.c_str(), output_count++);
     }
 }
 

bin/ltl2tgba.cc

@@ -155,8 +155,9 @@ namespace
       auto aut = trans.run(&f);
       timer.stop();
 
-      printer.print(aut, timer, f, filename, linenum, nullptr,
+      static unsigned index = 0;
-                    prefix, suffix);
+      printer.print(aut, timer, f, filename, linenum, index++,
+                    nullptr, prefix, suffix);
       // If we keep simplification caches around, atomic propositions
       // will still be defined, and one translation may influence the
       // variable order of the next one.

bin/ltldo.cc

@@ -360,8 +360,7 @@ namespace
                     const char* csv_prefix, const char* csv_suffix)
     {
       static long int output_count = 0;
-      ++output_count;
+      printer.print(aut, ptimer, f, filename, loc, output_count++, nullptr,
-      printer.print(aut, ptimer, f, filename, loc, nullptr,
                     csv_prefix, csv_suffix);
       if (opt_max_count >= 0 && output_count >= opt_max_count)
         abort_run = true;
@@ -420,8 +419,8 @@ namespace
               aut = post.run(aut, f);
               if (best_type)
                 {
-                  best_printer.print(nullptr, aut, f, filename, linenum, timer,
+                  best_printer.print(nullptr, aut, f, filename, linenum, 0,
-                                     prefix, suffix);
+                                     timer, prefix, suffix);
                   std::string aut_stats = best_stream.str();
                   if (!best_aut ||
                       (strverscmp(best_stats.c_str(), aut_stats.c_str())

bin/ltlfilt.cc

@@ -254,6 +254,8 @@ static const argp_option options[] =
       "the formula (in the selected syntax)", 0 },
     { "%F", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
       "the name of the input file", 0 },
+    { "%l", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
+      "the serial number of the output formula", 0 },
     { "%L", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
       "the original line number in the input file", 0 },
     { "%r", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
@@ -852,7 +854,8 @@ namespace
                                std::to_string(linenum).c_str()) << ")\n";
             }
           one_match = true;
-          output_formula_checked(f, &timer, filename, linenum, prefix, suffix);
+          output_formula_checked(f, &timer, filename, linenum,
+                                 match_count, prefix, suffix);
           ++match_count;
         }
       return 0;

bin/ltlgrind.cc

@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2014-2019, 2022 Laboratoire de Recherche et
+// Copyright (C) 2014-2019, 2022, 2023 Laboratoire de Recherche et
 // Développement de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -87,6 +87,8 @@ static const argp_option options[] = {
     "the formula (in the selected syntax)", 0 },
   { "%F", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
     "the name of the input file", 0 },
+  { "%l", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
+    "the serial number of the output formula (0-based)", 0 },
   { "%L", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
     "the original line number in the input file", 0 },
   { "%<", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
@@ -112,6 +114,8 @@ static const argp_child children[] = {
 
 namespace
 {
+  static unsigned output_count = 0;
+
   class mutate_processor final: public job_processor
   {
   public:
@@ -122,7 +126,8 @@ namespace
       auto mutations =
         spot::mutate(f, mut_opts, max_output, mutation_nb, opt_sort);
       for (auto g: mutations)
-        output_formula_checked(g, nullptr, filename, linenum, prefix, suffix);
+        output_formula_checked(g, nullptr, filename, linenum,
+                               output_count++, prefix, suffix);
       return 0;
     }
   };

bin/randaut.cc

@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2012-2016, 2018-2020, 2022 Laboratoire de Recherche
+// Copyright (C) 2012-2016, 2018-2020, 2022, 2023 Laboratoire de Recherche
 // et Développement de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -406,7 +406,8 @@ main(int argc, char** argv)
           timer.stop();
 
           printer.print(aut, timer, nullptr,
-                        opt_seed_str, automaton_num, nullptr);
+                        opt_seed_str, automaton_num,
+                        automaton_num, nullptr);
 
           ++automaton_num;
           if (opt_automata > 0 && automaton_num >= opt_automata)

bin/randltl.cc

@@ -115,8 +115,10 @@ static const argp_option options[] =
       "the following interpreted sequences:", -19 },
     { "%f", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
       "the formula (in the selected syntax)", 0 },
+    { "%l", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
+      "the (serial) number of the formula (0-based)", 0 },
     { "%L", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
-      "the (serial) number of the formula", 0 },
+      "the (serial) number of the formula (1-based)", 0 },
     { "%%", 0, nullptr, OPTION_DOC | OPTION_NO_USAGE,
       "a single %", 0 },
     COMMON_LTL_OUTPUT_SPECS,
@@ -305,9 +307,9 @@ main(int argc, char** argv)
           exit(0);
         }
 
+      int count = 0;
       while (opt_formulas < 0 || opt_formulas--)
         {
-          static int count = 0;
           spot::formula f = rg.next();
           if (!f)
             {
@@ -316,7 +318,8 @@ main(int argc, char** argv)
             }
           else
             {
-              output_formula_checked(f, nullptr, nullptr, ++count);
+              output_formula_checked(f, nullptr, nullptr, count + 1, count);
+              ++count;
             }
         };
       flush_cout();

doc/org/oaut.org

@@ -725,7 +725,8 @@ randaut --help | sed -n '/ sequences:/,/^$/p' | sed '1d;$d'
                              (iw) inherently weak. Use uppercase letters to
                              negate them.
   %d                         1 if the output is deterministic, 0 otherwise
-  %e                         number of reachable edges
+  %e, %[LETTER]e             number of edges (add one LETTER to select (r)
+                             reachable [default], (u) unreachable, (a) all).
   %F                         seed number
   %g, %[LETTERS]g            acceptance condition (in HOA syntax); add brackets
                              to print an acceptance name instead and LETTERS to
@@ -740,6 +741,7 @@ randaut --help | sed -n '/ sequences:/,/^$/p' | sed '1d;$d'
                              %[opt]h to specify additional options as in
                              --hoa=opt)
   %L                         automaton number
+  %l                         serial number of the output automaton (0-based)
   %m                         name of the automaton
   %n                         number of nondeterministic states in output
   %p                         1 if the output is complete, 0 otherwise
@@ -749,8 +751,11 @@ randaut --help | sed -n '/ sequences:/,/^$/p' | sed '1d;$d'
                              LETTERS to restrict to(u) user time, (s) system
                              time, (p) parent process, or (c) children
                              processes.
-  %s                         number of reachable states
+  %s, %[LETTER]s             number of states (add one LETTER to select (r)
-  %t                         number of reachable transitions
+                             reachable [default], (u) unreachable, (a) all).
+  %t, %[LETTER]t             number of transitions (add one LETTER to select
+                             (r) reachable [default], (u) unreachable, (a)
+                             all).
   %u, %[e]u                  number of states (or [e]dges) with universal
                              branching
   %u, %[LETTER]u             1 if the automaton contains some universal
@@ -996,6 +1001,14 @@ randaut -D -n 20 -Q2 1 -o '>>out-det%d.hoa'
 
 (You need the quotes so that the shell does not interpret =>>=.)
 
+The =%l= sequence is a number that is incremented for each output
+automaton.  For instance if =input.hoa= contains multiple automata,
+you can separate them into separate files with:
+
+#+BEGIN_SRC sh :exports code
+autilt input.hoa -o output-%l.hoa
+#+END_SRC
+
 #+BEGIN_SRC sh :results silent :exports results
 rm -f out-det0.hoa out-det1.hoa
 #+END_SRC

tests/Makefile.am

@@ -230,6 +230,7 @@ TESTS_twa = \
   core/cube.test \
   core/alternating.test \
   core/gamehoa.test \
+  core/serial.test \
   core/ltlcross3.test \
   core/ltlcross5.test \
   core/taatgba.test \

tests/core/serial.test

@@ -0,0 +1,71 @@
+#!/bin/sh
+# -*- coding: utf-8 -*-
+# Copyright (C) 2023 Laboratoire de Recherche et
+# Développement de 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
+# the Free Software Foundation; either version 3 of the License, or
+# (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
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+. ./defs
+set -e
+
+# all tools should be able to use %l as serial number for their output
+
+# Make sure serial numbers count the output automata
+randaut -n10 --name='aut %l' 2 |
+  autfilt -N3..5 --name='%M/out %l' |
+  autfilt --stats=%M >out
+cat >exp <<EOF
+aut 2/out 0
+aut 3/out 1
+aut 4/out 2
+EOF
+diff out exp
+
+# Create different files
+randaut -n3 2 -oaut-%l.hoa
+test -f aut-0.hoa
+test -f aut-1.hoa
+test -f aut-2.hoa
+
+# Split an output
+cat aut-0.hoa aut-1.hoa aut-2.hoa > aut.hoa
+rm aut-?.hoa
+autfilt aut.hoa -o aut-%l.hoa
+
+# check serial output in various tools
+genaut --m-nba=2..3 --name='%F=%L/%l' | autfilt --stats=%M >out
+genltl --and-f=2..3 --stats=%F=%L/%l >> out
+ltl2tgba a b --name=%f/%l | autfilt --stats=%M >> out
+ltldo -f a -f b ltl2tgba --name=%f/%l | autfilt --stats=%M >> out
+genltl --or-g=2..5 --stats=%L,%l,%f |
+  ltlfilt -F -/3 -N 2..3 --stats='%<,%l' >>out
+randltl -n10 3 --stats=%l,%f |
+  ltlfilt -F -/2 -N 2..3 --stats='%<,%l' >> out
+cat >exp<<EOF
+m-nba=2/0
+m-nba=3/1
+and-f=2/0
+and-f=3/1
+a/0
+b/1
+a/0
+b/1
+3,1,0
+4,2,1
+1,0
+2,1
+EOF
+diff -u out exp