From cfd888076c982ff8c2234228f71bdcefe2064f76 Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Sun, 22 Sep 2019 22:01:46 +0200
Subject: [PATCH 01/13] ltl2tgba, ltldo: add a --negate option

Suggested by Victor Khomenko.

* bin/ltl2tgba.cc, bin/ltldo.cc: Implement it.
* doc/org/hierarchy.org: Use it.
* tests/core/ltldo2.test: Test it.
* bin/common_output.cc: Typo.
* NEWS: Mention the new option.
---
 NEWS                   |  4 ++++
 bin/common_output.cc   |  4 ++--
 bin/ltl2tgba.cc        | 11 ++++++++++-
 bin/ltldo.cc           | 31 +++++++++++++++++++++++++++----
 doc/org/hierarchy.org  |  4 +---
 tests/core/ltldo2.test | 13 ++++++++++++-
 6 files changed, 56 insertions(+), 11 deletions(-)

diff --git a/NEWS b/NEWS
index 7707c4312..7201d96e9 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,9 @@
 New in spot 2.8.1.dev (not yet released)
 
+  Command-line tools:
+
+  - ltl2tgba and ltldo learned a --negate option.
+
   Bugs fixed:
 
   - Calling "autfilt --dualize" on an alternating automaton with
diff --git a/bin/common_output.cc b/bin/common_output.cc
index a264c3332..092a9329f 100644
--- a/bin/common_output.cc
+++ b/bin/common_output.cc
@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2012-2018 Laboratoire de Recherche et Développement
+// Copyright (C) 2012-2019 Laboratoire de Recherche et Développement
 // de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -82,7 +82,7 @@ report_not_ltl(spot::formula f,
 {
   std::string s = spot::str_psl(f);
   static const char msg[] =
-    "formula '%s' cannot be written %s's syntax because it is not LTL";
+    "formula '%s' cannot be written in %s's syntax because it is not LTL";
   if (filename)
     error_at_line(2, 0, filename, atoi(linenum), msg, s.c_str(), syn);
   else
diff --git a/bin/ltl2tgba.cc b/bin/ltl2tgba.cc
index 7ab4a5933..332b0a81b 100644
--- a/bin/ltl2tgba.cc
+++ b/bin/ltl2tgba.cc
@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2012-2018 Laboratoire de Recherche et Développement
+// Copyright (C) 2012-2019 Laboratoire de Recherche et Développement
 // de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -46,6 +46,7 @@ the smallest Transition-based Generalized Büchi Automata, \
 output in the HOA format.\n\
 If multiple formulas are supplied, several automata will be output.";
 
+enum { OPT_NEGATE = 256 };
 
 static const argp_option options[] =
   {
@@ -59,6 +60,7 @@ static const argp_option options[] =
       "the part of the line after the formula if it "
       "comes from a column extracted from a CSV file", 4 },
     /**************************************************/
+    { "negate", OPT_NEGATE, nullptr, 0, "negate each formula", 1 },
     { "unambiguous", 'U', nullptr, 0, "output unambiguous automata", 2 },
     { nullptr, 0, nullptr, 0, "Miscellaneous options:", -1 },
     { "extra-options", 'x', "OPTS", 0,
@@ -76,6 +78,7 @@ const struct argp_child children[] =
     { nullptr, 0, nullptr, 0 }
   };
 
+static bool negate = false;
 static spot::option_map extra_options;
 static spot::postprocessor::output_pref unambig = 0;
 
@@ -95,6 +98,9 @@ parse_opt(int key, char* arg, struct argp_state*)
           error(2, 0, "failed to parse --options near '%s'", opt);
       }
       break;
+    case OPT_NEGATE:
+      negate = true;
+      break;
     case ARGP_KEY_ARG:
       // FIXME: use stat() to distinguish filename from string?
       if (*arg == '-' && !arg[1])
@@ -139,6 +145,9 @@ namespace
                         s.c_str());
         }
 
+      if (negate)
+        f = spot::formula::Not(f);
+
       spot::process_timer timer;
       timer.start();
       auto aut = trans.run(&f);
diff --git a/bin/ltldo.cc b/bin/ltldo.cc
index 1b7afb48a..374d61c78 100644
--- a/bin/ltldo.cc
+++ b/bin/ltldo.cc
@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2015-2018 Laboratoire de Recherche et Développement
+// Copyright (C) 2015-2019 Laboratoire de Recherche et Développement
 // de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -33,6 +33,7 @@
 #include "common_conv.hh"
 #include "common_finput.hh"
 #include "common_aoutput.hh"
+#include "common_output.hh"
 #include "common_post.hh"
 #include "common_trans.hh"
 #include "common_hoaread.hh"
@@ -51,13 +52,15 @@ of input and output as required.";
 
 enum {
   OPT_ERRORS = 256,
-  OPT_SMALLEST,
-  OPT_GREATEST,
   OPT_FAIL_ON_TIMEOUT,
+  OPT_GREATEST,
+  OPT_NEGATE,
+  OPT_SMALLEST,
 };
 
 static const argp_option options[] =
   {
+    { "negate", OPT_NEGATE, nullptr, 0, "negate each formula", 1 },
     /**************************************************/
     { nullptr, 0, nullptr, 0, "Error handling:", 4 },
     { "errors", OPT_ERRORS, "abort|warn|ignore", 0,
@@ -129,6 +132,7 @@ static bool fail_on_timeout = false;
 static int best_type = 0;       // -1 smallest, 1 greatest, 0 no selection
 static const char* best_format = "%s,%e";
 static int opt_max_count = -1;
+static bool negate = false;
 
 static char const *const errors_args[] =
 {
@@ -173,6 +177,9 @@ parse_opt(int key, char* arg, struct argp_state*)
       if (arg)
         best_format = arg;
       break;
+    case OPT_NEGATE:
+      negate = true;
+      break;
     case OPT_SMALLEST:
       best_type = -1;
       if (arg)
@@ -336,7 +343,17 @@ namespace
           return 1;
         }
 
-      inputf = input;
+      if (negate)
+        {
+          pf.f = spot::formula::Not(pf.f);
+          std::ostringstream os;
+          stream_formula(os, pf.f, filename, std::to_string(linenum).c_str());
+          inputf = os.str();
+        }
+      else
+        {
+          inputf = input;
+        }
       process_formula(pf.f, filename, linenum);
       return 0;
     }
@@ -464,6 +481,12 @@ main(int argc, char** argv)
 
       setup_sig_handler();
 
+      // Usually we print the formula as it was given to us, but
+      // if --negate is used we have to reformat it.  We don't know
+      // was the input format unless --lbt-input was given, and in
+      // that case we keep it for output.
+      output_format = lbt_input ? lbt_output : spot_output;
+
       spot::postprocessor post;
       post.set_pref(pref | comp | sbacc | colored);
       post.set_type(type);
diff --git a/doc/org/hierarchy.org b/doc/org/hierarchy.org
index b0c0e4d80..f0df4c157 100644
--- a/doc/org/hierarchy.org
+++ b/doc/org/hierarchy.org
@@ -646,9 +646,7 @@ complementation ourselves:
 
 #+NAME: hier-persistence-2
 #+BEGIN_SRC sh :exports code
-ltlfilt --negate -f FGa |
-  ltl2tgba -D |
-  autfilt --complement -d
+ltl2tgba --negate -D FGa | autfilt --complement -d
 #+END_SRC
 #+BEGIN_SRC dot :file hier-persistence-2.svg :var txt=hier-persistence-2 :exports results
 $txt
diff --git a/tests/core/ltldo2.test b/tests/core/ltldo2.test
index 4d739f39e..4998ce98d 100755
--- a/tests/core/ltldo2.test
+++ b/tests/core/ltldo2.test
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- coding: utf-8 -*-
-# Copyright (C) 2015, 2016, 2017 Laboratoire de Recherche et
+# Copyright (C) 2015-2017, 2019 Laboratoire de Recherche et
 # Développement de l'Epita (LRDE).
 #
 # This file is part of Spot, a model checking library.
@@ -37,3 +37,14 @@ diff aut1.hoa aut2.hoa
 
 test "ltl2tgba -D" = \
   "`ltldo 'ltl2tgba -D' ltl2tgba -f 'Ga | Gb | Gc' --greatest=%e --stats=%T`"
+
+
+ltldo --negate 'ltl2tgba -D' -f FGa --stats=%f,%s >out.csv
+ltldo --negate 'ltl2tgba -D' --lbt-input -f 'F G a' --stats=%f,%s >>out.csv
+ltl2tgba --negate -D FGa --stats=%f,%s >>out.csv
+cat >expected <<EOF
+!FGa,1
+! F G "a",1
+GF!a,1
+EOF
+diff out.csv expected

From 2f2351a50f0300a1b7b8cc54d74bda9dc829631c Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Mon, 23 Sep 2019 17:09:54 +0200
Subject: [PATCH 02/13] * doc/org/init.el.in: Work around obsolete ELPA
 signatures.

---
 doc/org/init.el.in | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/doc/org/init.el.in b/doc/org/init.el.in
index db416f1ed..ed0820b32 100644
--- a/doc/org/init.el.in
+++ b/doc/org/init.el.in
@@ -3,6 +3,15 @@
 
 (setq debug-on-error t)
 
+;;; Some combination of GNU TLS and Emacs fail to retrieve archive
+;;; contents over https.
+;;; https://www.reddit.com/r/emacs/comments/cdf48c/failed_to_download_gnu_archive/
+;;; https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34341
+(if (and (version< emacs-version "26.3") (>= libgnutls-version 30600))
+    (setq gnutls-algorithm-priority "NORMAL:-VERS-TLS1.3"))
+; work around obsolete ELPA signatures :-(
+(setq package-check-signature 'nil)
+
 (package-initialize)
 (require 'cl)
 (setq features-before features)
@@ -11,13 +20,6 @@
 (print (org-version nil t t))
 (print (concat "Org " org-version))
 
-; Some combination of GNU TLS and Emacs fail to retrieve archive
-; contents over https.
-; https://www.reddit.com/r/emacs/comments/cdf48c/failed_to_download_gnu_archive/
-; https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34341
-(if (and (version< emacs-version "26.3") (>= libgnutls-version 30600))
-    (setq gnutls-algorithm-priority "NORMAL:-VERS-TLS1.3"))
-
 ; The Org version that ships with emacs is usually too old.
 (when (version< org-version "9.1")
   (warn "Org-mode is too old; attempting to download a more recent version")

From a7e4cb4182e5ce3655c0914b9f989e7584b37a57 Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Tue, 24 Sep 2019 16:56:39 +0200
Subject: [PATCH 03/13] [buddy] fix ARM compilation

* src/bddop.c, src/bddx.h, examples/bddtest/bddtest.cxx: Use signed
char* instead of char*.
---
 buddy/examples/bddtest/bddtest.cxx | 4 ++--
 buddy/src/bddop.c                  | 6 +++---
 buddy/src/bddx.h                   | 2 +-
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/buddy/examples/bddtest/bddtest.cxx b/buddy/examples/bddtest/bddtest.cxx
index 3e1444e24..3478a65bc 100644
--- a/buddy/examples/bddtest/bddtest.cxx
+++ b/buddy/examples/bddtest/bddtest.cxx
@@ -8,7 +8,7 @@ static const int varnum = 5;
   Example of allsat print handler.
 **************************************************************************/
 
-void allsatHandlerPrint(char* varset, int size)
+void allsatHandlerPrint(signed char* varset, int size)
 {
   using namespace std ;
   for (int v=0; v<size ; ++v)
@@ -26,7 +26,7 @@ void allsatHandlerPrint(char* varset, int size)
 static bdd allsatBDD;
 static bdd allsatSumBDD;
 
-void allsatHandler(char* varset, int size)
+void allsatHandler(signed char* varset, int size)
 {
   bdd x = bddtrue;
   for (int v=0 ; v<size ; ++v)
diff --git a/buddy/src/bddop.c b/buddy/src/bddop.c
index 5592ee232..7adaea55b 100644
--- a/buddy/src/bddop.c
+++ b/buddy/src/bddop.c
@@ -122,7 +122,7 @@ static int firstReorder;            /* Used instead of local variable in order
 				       to avoid compiler warning about 'first'
 				       being clobbered by setjmp */
 
-static char*            allsatProfile; /* Variable profile for bdd_allsat() */
+static signed char*     allsatProfile; /* Variable profile for bdd_allsat() */
 static bddallsathandler allsatHandler; /* Callback handler for bdd_allsat() */
 
 extern bddCacheStat bddcachestats;
@@ -2691,7 +2691,7 @@ DESCR   {* Iterates through all legal variable assignments (those
 	   The following is an example of a callback handler that
 	   prints 'X' for don't cares, '0' for zero, and '1' for one:
 	   \begin{verbatim}
-void allsatPrintHandler(char* varset, int size)
+void allsatPrintHandler(signed char* varset, int size)
 {
   for (int v=0; v<size ; ++v)
   {
@@ -2713,7 +2713,7 @@ void bdd_allsat(BDD r, bddallsathandler handler)
 
    CHECKn(r);
 
-   if (__unlikely((allsatProfile=(char*)malloc(bddvarnum)) == NULL))
+   if (__unlikely((allsatProfile=(signed char*)malloc(bddvarnum)) == NULL))
    {
       bdd_error(BDD_MEMORY);
       return;
diff --git a/buddy/src/bddx.h b/buddy/src/bddx.h
index 957385b4f..573569c7f 100644
--- a/buddy/src/bddx.h
+++ b/buddy/src/bddx.h
@@ -268,7 +268,7 @@ typedef void (*bddgbchandler)(int,bddGbcStat*);
 typedef void (*bdd2inthandler)(int,int);
 typedef int  (*bddsizehandler)(void);
 typedef void (*bddfilehandler)(FILE *, int);
-typedef void (*bddallsathandler)(char*, int);
+typedef void (*bddallsathandler)(signed char*, int);
 
 BUDDY_API bddinthandler  bdd_error_hook(bddinthandler);
 BUDDY_API bddgbchandler  bdd_gbc_hook(bddgbchandler);

From 0da5f44cd230738fc4e31d7594662f42485c9c9b Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Tue, 24 Sep 2019 11:48:06 +0200
Subject: [PATCH 04/13] fix ARM builds

* spot/misc/bitvect.hh (bitvect_array::at): Fix pointer cast.
* spot/twa/bddprint.cc: Adjust to use signed char* explicitly.
* spot/twaalgos/gtec/gtec.hh: Work around GCC bug #90309.
* .gitlab-ci.yml: Add raspbian build.
---
 .gitlab-ci.yml             | 17 +++++++++++++++++
 spot/misc/bitvect.hh       | 23 ++++++++++++++---------
 spot/twa/bddprint.cc       |  8 ++++----
 spot/twaalgos/gtec/gtec.hh |  6 +++++-
 4 files changed, 40 insertions(+), 14 deletions(-)

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 40567ebfa..6db16b71e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -83,6 +83,7 @@ alpine-gcc:
     - ./configure
     - make
     - make check
+    - make distcheck || { chmod -R u+w ./spot-*; false; }
   artifacts:
     when: always
     paths:
@@ -284,3 +285,19 @@ publish-unstable:
     - dput lrde *.changes
     - curl -X POST -F ref=master -F token=$TRIGGER_SPOT_WEB -F "variables[spot_branch]=next" https://gitlab.lrde.epita.fr/api/v4/projects/131/trigger/pipeline
     - curl -X POST -F ref=master -F token=$TRIGGER_SANDBOX https://gitlab.lrde.epita.fr/api/v4/projects/181/trigger/pipeline
+
+raspbian:
+  stage: build
+  tags:
+    - armv7
+  script:
+    - autoreconf -vfi
+    - ./configure
+    - make
+    - make distcheck || { chmod -R u+w ./spot-*; false; }
+  artifacts:
+    when: always
+    paths:
+      - ./spot-*/_build/sub/tests/*/*.log
+      - ./*.log
+      - ./*.tar.gz
diff --git a/spot/misc/bitvect.hh b/spot/misc/bitvect.hh
index cf5771804..330f6045f 100644
--- a/spot/misc/bitvect.hh
+++ b/spot/misc/bitvect.hh
@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2013-2018 Laboratoire de Recherche et Développement
+// Copyright (C) 2013-2019 Laboratoire de Recherche et Développement
 // de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -416,13 +416,6 @@ namespace spot
       return size_;
     }
 
-    /// Return the bit-vector at \a index.
-    bitvect& at(const size_t index)
-    {
-      SPOT_ASSERT(index < size_);
-      return *reinterpret_cast<bitvect*>(storage() + index * bvsize_);
-    }
-
     void clear_all()
     {
       // FIXME: This could be changed into a large memset if the
@@ -431,11 +424,23 @@ namespace spot
         at(s).clear_all();
     }
 
+    /// Return the bit-vector at \a index.
+    bitvect& at(const size_t index)
+    {
+      SPOT_ASSERT(index < size_);
+      // The double cast is to prevent -Wcast-align diagnostics
+      // about the fact that char* (the type of storage) has a
+      // smaller required alignment than bitvect*.
+      auto v = static_cast<void*>(storage() + index * bvsize_);
+      return *static_cast<bitvect*>(v);
+    }
+
     /// Return the bit-vector at \a index.
     const bitvect& at(const size_t index) const
     {
       SPOT_ASSERT(index < size_);
-      return *reinterpret_cast<const bitvect*>(storage() + index * bvsize_);
+      auto v = static_cast<const void*>(storage() + index * bvsize_);
+      return *static_cast<const bitvect*>(v);
     }
 
     friend SPOT_API bitvect_array* make_bitvect_array(size_t bitcount,
diff --git a/spot/twa/bddprint.cc b/spot/twa/bddprint.cc
index a0d4b3625..ea0d84c2c 100644
--- a/spot/twa/bddprint.cc
+++ b/spot/twa/bddprint.cc
@@ -1,6 +1,6 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2009, 2012, 2014, 2015, 2018 Laboratoire de Recherche
-// et Développement de l'Epita (LRDE).
+// Copyright (C) 2009, 2012, 2014, 2015, 2018, 2019 Laboratoire de
+// Recherche et Développement de l'Epita (LRDE).
 // Copyright (C) 2003, 2004 Laboratoire d'Informatique de Paris 6
 // (LIP6), département Systèmes Répartis Coopératifs (SRC), Université
 // Pierre et Marie Curie.
@@ -81,7 +81,7 @@ namespace spot
 
   static std::ostream* where;
   static void
-  print_sat_handler(char* varset, int size)
+  print_sat_handler(signed char* varset, int size)
   {
     bool not_first = false;
     for (int v = 0; v < size; ++v)
@@ -111,7 +111,7 @@ namespace spot
 
   static bool first_done = false;
   static void
-  print_accset_handler(char* varset, int size)
+  print_accset_handler(signed char* varset, int size)
   {
     for (int v = 0; v < size; ++v)
       if (varset[v] > 0)
diff --git a/spot/twaalgos/gtec/gtec.hh b/spot/twaalgos/gtec/gtec.hh
index c601ca0d1..c3ddcb0c1 100644
--- a/spot/twaalgos/gtec/gtec.hh
+++ b/spot/twaalgos/gtec/gtec.hh
@@ -125,7 +125,10 @@ namespace spot
   /// \brief An implementation of the Couvreur99 emptiness-check algorithm.
   ///
   /// See the documentation for spot::couvreur99.
-  class SPOT_API couvreur99_check: public emptiness_check, public ec_statistics
+  class SPOT_API couvreur99_check:
+    // We inherit from ec_statistics first to work around GCC bug #90309.
+    // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90309#c6
+    public ec_statistics, public emptiness_check
   {
   public:
     couvreur99_check(const const_twa_ptr& a, option_map o = option_map());
@@ -160,6 +163,7 @@ namespace spot
     bool poprem_;
     /// Number of dead SCC removed by the algorithm.
     unsigned removed_components;
+
     unsigned get_removed_components() const;
     unsigned get_vmsize() const;
   };

From 6bdb135724427584d27b611354bda46edcb3653f Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Wed, 25 Sep 2019 21:57:25 +0200
Subject: [PATCH 05/13] bin: handle any exception before returning from
 parse_opt()

On some architectures (e.g., ARM, or even some -flto setups on Intel)
C++ exceptions to not traverse the C functions.  So even if the C++
main() has a try/catch, it will not catch the exception thrown by C++
code called from the argp module (which is compiled in C).

* bin/common_setup.cc, bin/common_setup.hh: Define some macros
and function to factorize exception handling.
* bin/autcross.cc, bin/autfilt.cc, bin/common_aoutput.cc,
bin/common_color.cc, bin/common_finput.cc, bin/common_hoaread.cc,
bin/common_output.cc, bin/common_post.cc, bin/common_trans.cc,
bin/dstar2tgba.cc, bin/genaut.cc, bin/genltl.cc, bin/ltl2tgba.cc,
bin/ltl2tgta.cc, bin/ltlcross.cc, bin/ltldo.cc, bin/ltlfilt.cc,
bin/ltlgrind.cc, bin/ltlsynt.cc, bin/randaut.cc, bin/randltl.cc:
Protect all parse_opt() functions, even those where there is currently
no exception risk.
---
 bin/autcross.cc       |  3 +++
 bin/autfilt.cc        |  3 +++
 bin/common_aoutput.cc |  4 ++++
 bin/common_color.cc   |  8 ++++++--
 bin/common_finput.cc  |  7 +++++--
 bin/common_hoaread.cc |  8 ++++++--
 bin/common_output.cc  |  4 ++++
 bin/common_post.cc    |  6 +++++-
 bin/common_setup.cc   | 23 +++++++++++++++++------
 bin/common_setup.hh   |  7 ++++++-
 bin/common_trans.cc   |  4 ++++
 bin/dstar2tgba.cc     |  5 ++++-
 bin/genaut.cc         |  3 +++
 bin/genltl.cc         |  3 +++
 bin/ltl2tgba.cc       |  3 +++
 bin/ltl2tgta.cc       |  5 ++++-
 bin/ltlcross.cc       |  3 +++
 bin/ltldo.cc          |  3 +++
 bin/ltlfilt.cc        |  3 +++
 bin/ltlgrind.cc       |  5 ++++-
 bin/ltlsynt.cc        |  3 +++
 bin/randaut.cc        |  5 ++++-
 bin/randltl.cc        |  5 ++++-
 23 files changed, 104 insertions(+), 19 deletions(-)

diff --git a/bin/autcross.cc b/bin/autcross.cc
index 8a1394ddb..437759429 100644
--- a/bin/autcross.cc
+++ b/bin/autcross.cc
@@ -153,6 +153,8 @@ static output_file* bogus_output = nullptr;
 static int
 parse_opt(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   switch (key)
     {
     case 'F':
@@ -214,6 +216,7 @@ parse_opt(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/autfilt.cc b/bin/autfilt.cc
index f8cbf7dc4..e0f8279b2 100644
--- a/bin/autfilt.cc
+++ b/bin/autfilt.cc
@@ -688,6 +688,8 @@ product_or(spot::twa_graph_ptr left, spot::twa_graph_ptr right)
 static int
 parse_opt(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -1154,6 +1156,7 @@ parse_opt(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/common_aoutput.cc b/bin/common_aoutput.cc
index 9e8976da9..8ec651fbc 100644
--- a/bin/common_aoutput.cc
+++ b/bin/common_aoutput.cc
@@ -24,6 +24,7 @@
 #include "common_aoutput.hh"
 #include "common_post.hh"
 #include "common_cout.hh"
+#include "common_setup.hh"
 
 #include <unistd.h>
 #include <ctime>
@@ -304,6 +305,8 @@ const struct argp aoutput_o_format_argp = { o_options,
 
 int parse_opt_aoutput(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -358,6 +361,7 @@ int parse_opt_aoutput(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/common_color.cc b/bin/common_color.cc
index 7b6330356..5c49e2021 100644
--- a/bin/common_color.cc
+++ b/bin/common_color.cc
@@ -1,6 +1,6 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2017 Laboratoire de Recherche et Développement de
-// l'Epita (LRDE).
+// Copyright (C) 2017, 2019 Laboratoire de Recherche et Développement
+// de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
 //
@@ -19,6 +19,7 @@
 
 #include "common_sys.hh"
 #include "common_color.hh"
+#include "common_setup.hh"
 
 #include <argp.h>
 #include <unistd.h>
@@ -77,6 +78,8 @@ static const argp_option options_color[] =
 static int
 parse_opt_color(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -91,6 +94,7 @@ parse_opt_color(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/common_finput.cc b/bin/common_finput.cc
index f19e64a6b..67e5a4353 100644
--- a/bin/common_finput.cc
+++ b/bin/common_finput.cc
@@ -1,6 +1,6 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2012-2017 Laboratoire de Recherche
-// et Développement de l'Epita (LRDE).
+// Copyright (C) 2012-2017, 2019 Laboratoire de Recherche et
+// Développement de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
 //
@@ -62,6 +62,8 @@ const struct argp finput_argp_headless = { options + 1, parse_opt_finput,
 int
 parse_opt_finput(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -80,6 +82,7 @@ parse_opt_finput(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/common_hoaread.cc b/bin/common_hoaread.cc
index 809796b0c..919378da4 100644
--- a/bin/common_hoaread.cc
+++ b/bin/common_hoaread.cc
@@ -1,6 +1,6 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2015 Laboratoire de Recherche et Développement de
-// l'Epita (LRDE).
+// Copyright (C) 2015, 2019 Laboratoire de Recherche et Développement
+// de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
 //
@@ -18,6 +18,7 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "common_hoaread.hh"
+#include "common_setup.hh"
 #include "argmatch.h"
 #include "error.h"
 
@@ -72,6 +73,8 @@ static bool parse_bool(const char* opt, const char* arg)
 static int
 parse_opt_hoaread(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -81,6 +84,7 @@ parse_opt_hoaread(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/common_output.cc b/bin/common_output.cc
index 092a9329f..e9c61a513 100644
--- a/bin/common_output.cc
+++ b/bin/common_output.cc
@@ -20,6 +20,7 @@
 #include "common_sys.hh"
 #include "common_output.hh"
 #include "common_aoutput.hh"
+#include "common_setup.hh"
 #include <iostream>
 #include <sstream>
 #include <spot/tl/print.hh>
@@ -304,6 +305,8 @@ static std::map<std::string, std::unique_ptr<output_file>> outputfiles;
 int
 parse_opt_output(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -344,6 +347,7 @@ parse_opt_output(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/common_post.cc b/bin/common_post.cc
index ef97b0a26..e6ebfd29b 100644
--- a/bin/common_post.cc
+++ b/bin/common_post.cc
@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2012-2016, 2018 Laboratoire de Recherche et
+// Copyright (C) 2012-2016, 2018-2019 Laboratoire de Recherche et
 // Développement de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -20,6 +20,7 @@
 #include "common_post.hh"
 #include "common_r.hh"
 #include "common_aoutput.hh"
+#include "common_setup.hh"
 #include "error.h"
 #include "argmatch.h"
 
@@ -154,6 +155,8 @@ static const argp_option options_disabled[] =
 static int
 parse_opt_post(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -253,6 +256,7 @@ parse_opt_post(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/common_setup.cc b/bin/common_setup.cc
index 99b4eb202..dab5df571 100644
--- a/bin/common_setup.cc
+++ b/bin/common_setup.cc
@@ -150,6 +150,8 @@ static const argp_option options_hidden[] =
 static int
 parse_opt_misc(int key, char*, struct argp_state* state)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -170,6 +172,7 @@ parse_opt_misc(int key, char*, struct argp_state* state)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
@@ -181,6 +184,18 @@ const struct argp misc_argp_hidden = { options_hidden, parse_opt_misc,
                                        nullptr, nullptr, nullptr,
                                        nullptr, nullptr };
 
+[[noreturn]] void handle_any_exception()
+{
+  try
+    {
+      throw;
+    }
+  catch (const std::exception& e)
+    {
+      error(2, 0, "%s", e.what());
+    }
+  SPOT_UNREACHABLE();
+}
 
 int protected_main(char** progname, std::function<int()> mainfun)
 {
@@ -189,13 +204,9 @@ int protected_main(char** progname, std::function<int()> mainfun)
       setup(progname);
       return mainfun();
     }
-  catch (const std::runtime_error& e)
+  catch (...)
     {
-      error(2, 0, "%s", e.what());
-    }
-  catch (const std::invalid_argument& e)
-    {
-      error(2, 0, "%s", e.what());
+      handle_any_exception();
     }
   SPOT_UNREACHABLE();
   return 2;
diff --git a/bin/common_setup.hh b/bin/common_setup.hh
index 41f4a71a2..e2fce84e0 100644
--- a/bin/common_setup.hh
+++ b/bin/common_setup.hh
@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2012, 2013, 2018 Laboratoire de Recherche et
+// Copyright (C) 2012, 2013, 2018, 2019 Laboratoire de Recherche et
 // Développement de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -31,3 +31,8 @@ extern const struct argp misc_argp_hidden;
 
 // Call setup(progname) then Run mainfun() and handle exceptions.
 int protected_main(char** progname, std::function<int()> mainfun);
+
+// Diagnose exceptions.
+[[noreturn]] void handle_any_exception();
+#define BEGIN_EXCEPTION_PROTECT try { (void)0;
+#define END_EXCEPTION_PROTECT } catch (...) { handle_any_exception(); }
diff --git a/bin/common_trans.cc b/bin/common_trans.cc
index bac0c15ba..e3df2316b 100644
--- a/bin/common_trans.cc
+++ b/bin/common_trans.cc
@@ -18,6 +18,7 @@
 // along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 #include "common_trans.hh"
+#include "common_setup.hh"
 #include <cstring>
 #include <cstdlib>
 #include <cassert>
@@ -902,6 +903,8 @@ bool opt_relabel = false;
 
 static int parse_opt_trans(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   switch (key)
     {
     case 't':
@@ -930,6 +933,7 @@ static int parse_opt_trans(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/dstar2tgba.cc b/bin/dstar2tgba.cc
index 1abe45f23..3bf5b9393 100644
--- a/bin/dstar2tgba.cc
+++ b/bin/dstar2tgba.cc
@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2013-2018 Laboratoire de Recherche et Développement
+// Copyright (C) 2013-2019 Laboratoire de Recherche et Développement
 // de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -83,6 +83,8 @@ static spot::option_map extra_options;
 static int
 parse_opt(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -102,6 +104,7 @@ parse_opt(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/genaut.cc b/bin/genaut.cc
index 9e8f1939e..eb2163cab 100644
--- a/bin/genaut.cc
+++ b/bin/genaut.cc
@@ -97,11 +97,14 @@ enqueue_job(int pattern, const char* range_str)
 static int
 parse_opt(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   if (key >= gen::AUT_BEGIN && key < gen::AUT_END)
     {
       enqueue_job(key, arg);
       return 0;
     }
+  END_EXCEPTION_PROTECT;
   return ARGP_ERR_UNKNOWN;
 }
 
diff --git a/bin/genltl.cc b/bin/genltl.cc
index c9f8374bd..6c632de7a 100644
--- a/bin/genltl.cc
+++ b/bin/genltl.cc
@@ -261,6 +261,8 @@ enqueue_job(int pattern, const char* range_str = nullptr)
 static int
 parse_opt(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   if (key >= gen::LTL_BEGIN && key < gen::LTL_END)
     {
       enqueue_job(key, arg);
@@ -278,6 +280,7 @@ parse_opt(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/ltl2tgba.cc b/bin/ltl2tgba.cc
index 332b0a81b..e24e7e856 100644
--- a/bin/ltl2tgba.cc
+++ b/bin/ltl2tgba.cc
@@ -85,6 +85,8 @@ static spot::postprocessor::output_pref unambig = 0;
 static int
 parse_opt(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -112,6 +114,7 @@ parse_opt(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/ltl2tgta.cc b/bin/ltl2tgta.cc
index 198b9ccfe..8663f5513 100644
--- a/bin/ltl2tgta.cc
+++ b/bin/ltl2tgta.cc
@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2012-2018 Laboratoire de Recherche et Développement
+// Copyright (C) 2012-2019 Laboratoire de Recherche et Développement
 // de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -109,6 +109,8 @@ bool opt_with_artificial_livelock = false;
 static int
 parse_opt(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -154,6 +156,7 @@ parse_opt(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/ltlcross.cc b/bin/ltlcross.cc
index edb5caa41..efafe7b31 100644
--- a/bin/ltlcross.cc
+++ b/bin/ltlcross.cc
@@ -440,6 +440,8 @@ std::vector<std::string> formulas;
 static int
 parse_opt(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -556,6 +558,7 @@ parse_opt(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/ltldo.cc b/bin/ltldo.cc
index 374d61c78..f3e68c34b 100644
--- a/bin/ltldo.cc
+++ b/bin/ltldo.cc
@@ -164,6 +164,8 @@ const struct argp_child children[] =
 static int
 parse_opt(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   switch (key)
     {
     case OPT_ERRORS:
@@ -197,6 +199,7 @@ parse_opt(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/ltlfilt.cc b/bin/ltlfilt.cc
index a5a872012..68b4a1d2c 100644
--- a/bin/ltlfilt.cc
+++ b/bin/ltlfilt.cc
@@ -345,6 +345,8 @@ parse_formula_arg(const std::string& input)
 static int
 parse_opt(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -545,6 +547,7 @@ parse_opt(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/ltlgrind.cc b/bin/ltlgrind.cc
index 2e141e863..393656b00 100644
--- a/bin/ltlgrind.cc
+++ b/bin/ltlgrind.cc
@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2014, 2015, 2016, 2017, 2018 Laboratoire de Recherche et
+// Copyright (C) 2014, 2015, 2016, 2017, 2018, 2019 Laboratoire de Recherche et
 // Développement de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -131,6 +131,8 @@ namespace
 static int
 parse_opt(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   switch (key)
     {
     case 'm':
@@ -177,6 +179,7 @@ parse_opt(int key, char* arg, struct argp_state*)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/ltlsynt.cc b/bin/ltlsynt.cc
index 99e7410eb..8377b79d6 100644
--- a/bin/ltlsynt.cc
+++ b/bin/ltlsynt.cc
@@ -412,6 +412,8 @@ namespace
 static int
 parse_opt(int key, char* arg, struct argp_state*)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   switch (key)
     {
     case OPT_INPUT:
@@ -452,6 +454,7 @@ parse_opt(int key, char* arg, struct argp_state*)
       verbose = true;
       break;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/randaut.cc b/bin/randaut.cc
index 76e17085a..8a14ae740 100644
--- a/bin/randaut.cc
+++ b/bin/randaut.cc
@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2012, 2013, 2014, 2015, 2016, 2018 Laboratoire de Recherche et
+// Copyright (C) 2012-2016, 2018-2019 Laboratoire de Recherche et
 // Développement de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -182,6 +182,8 @@ looks_like_a_range(const char* str)
 static int
 parse_opt(int key, char* arg, struct argp_state* as)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -264,6 +266,7 @@ parse_opt(int key, char* arg, struct argp_state* as)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 
diff --git a/bin/randltl.cc b/bin/randltl.cc
index 47bfdb3bf..cded77171 100644
--- a/bin/randltl.cc
+++ b/bin/randltl.cc
@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2012, 2013, 2014, 2015, 2016, 2018 Laboratoire de Recherche
+// Copyright (C) 2012-2016, 2018-2019 Laboratoire de Recherche
 // et Développement de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -159,6 +159,8 @@ static bool ap_count_given = false;
 static int
 parse_opt(int key, char* arg, struct argp_state* as)
 {
+  // Called from C code, so should not raise any exception.
+  BEGIN_EXCEPTION_PROTECT;
   // This switch is alphabetically-ordered.
   switch (key)
     {
@@ -231,6 +233,7 @@ parse_opt(int key, char* arg, struct argp_state* as)
     default:
       return ARGP_ERR_UNKNOWN;
     }
+  END_EXCEPTION_PROTECT;
   return 0;
 }
 

From 4c0e7bf865843f393d8fbdb73b8469c12e032e5b Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Thu, 26 Sep 2019 11:44:15 +0200
Subject: [PATCH 06/13] aiger: simplify output code, and fix some function call
 order

* spot/twaalgos/aiger.cc: Simplify some bit operatitions.  Force the
ordering of operations in aig_and, that was causing a test case to
fail on ARM, and greatly simplify the code and data structures used in
remove_unused().
* tests/core/ltlsynt.test: Adjust expected output.
---
 spot/twaalgos/aiger.cc  | 91 +++++++++++++++++++++++------------------
 tests/core/ltlsynt.test | 10 ++---
 2 files changed, 56 insertions(+), 45 deletions(-)

diff --git a/spot/twaalgos/aiger.cc b/spot/twaalgos/aiger.cc
index 459e82c97..ea8f8ee6e 100644
--- a/spot/twaalgos/aiger.cc
+++ b/spot/twaalgos/aiger.cc
@@ -1,5 +1,5 @@
 // -*- coding: utf-8 -*-
-// Copyright (C) 2017-2018 Laboratoire de Recherche et Développement
+// Copyright (C) 2017-2019 Laboratoire de Recherche et Développement
 // de l'Epita (LRDE).
 //
 // This file is part of Spot, a model checking library.
@@ -120,7 +120,7 @@ namespace spot
 
       unsigned aig_not(unsigned v)
       {
-        unsigned not_v = v + 1 - 2 * (v % 2);
+        unsigned not_v = v ^ 1;
         assert(var2bdd_.count(v));
         var2bdd_[not_v] = !(var2bdd_[v]);
         bdd2var_[var2bdd_[not_v]] = not_v;
@@ -137,9 +137,8 @@ namespace spot
           return it->second;
         max_var_ += 2;
         and_gates_[max_var_] = {v1, v2};
-        bdd v1v2 = var2bdd_[v1] & var2bdd_[v2];
-        bdd2var_[v1v2] = max_var_;
-        var2bdd_[max_var_] = v1v2;
+        bdd2var_[b] = max_var_;
+        var2bdd_[max_var_] = b;
         return max_var_;
       }
 
@@ -152,14 +151,18 @@ namespace spot
         if (vs.size() == 2)
           return aig_and(vs[0], vs[1]);
         unsigned m = vs.size() / 2;
-        std::vector<unsigned> left(vs.begin(), vs.begin() + m);
-        std::vector<unsigned> right(vs.begin() + m, vs.end());
-        return aig_and(aig_and(left), aig_and(right));
+        unsigned left =
+          aig_and(std::vector<unsigned>(vs.begin(), vs.begin() + m));
+        unsigned right =
+          aig_and(std::vector<unsigned>(vs.begin() + m, vs.end()));
+        return aig_and(left, right);
       }
 
       unsigned aig_or(unsigned v1, unsigned v2)
       {
-        return aig_not(aig_and(aig_not(v1), aig_not(v2)));
+        unsigned n1 = aig_not(v1);
+        unsigned n2 = aig_not(v2);
+        return aig_not(aig_and(n1, n2));
       }
 
       unsigned aig_or(std::vector<unsigned> vs)
@@ -171,45 +174,53 @@ namespace spot
 
       unsigned aig_pos(unsigned v)
       {
-        return v - v % 2;
+
+        return v & ~1;
       }
 
       void remove_unused()
       {
-        std::unordered_set<unsigned> todo;
+        // Run a DFS on the gates and latches to collect
+        // all nodes connected to the output.
+        std::deque<unsigned> todo;
+        std::vector<bool> used(max_var_ / 2 + 1, false);
+        auto mark = [&](unsigned v)
+                    {
+                      unsigned pos = aig_pos(v);
+                      if (!used[pos/2])
+                        {
+                          used[pos/2] = 1;
+                          todo.push_back(pos);
+                        }
+                    };
         for (unsigned v : outputs_)
-          todo.insert(aig_pos(v));
-        std::unordered_set<unsigned> used;
+          mark(v);
         while (!todo.empty())
           {
-            used.insert(todo.begin(), todo.end());
-            std::unordered_set<unsigned> todo_next;
-            for (unsigned v : todo)
+            unsigned v = todo.front();
+            todo.pop_front();
+            auto it_and = and_gates_.find(v);
+            if (it_and != and_gates_.end())
               {
-                auto it_and = and_gates_.find(v);
-                if (it_and != and_gates_.end())
-                  {
-                    if (!used.count(aig_pos(it_and->second.first)))
-                      todo_next.insert(aig_pos(it_and->second.first));
-                    if (!used.count(aig_pos(it_and->second.second)))
-                      todo_next.insert(aig_pos(it_and->second.second));
-                  }
-                else if (v <= (num_inputs_ + latches_.size()) * 2
-                         && v > num_inputs_ * 2)
-                  {
-                    unsigned l = v / 2 - num_inputs_ - 1;
-                    if (!used.count(aig_pos(latches_[l])))
-                      todo_next.insert(aig_pos(latches_[l]));
-                  }
+                mark(it_and->second.first);
+                mark(it_and->second.second);
+              }
+            else if (v <= (num_inputs_ + latches_.size()) * 2
+                     && v > num_inputs_ * 2)
+              {
+                mark(latches_[v / 2 - num_inputs_ - 1]);
               }
-            todo = todo_next;
           }
-        std::unordered_set<unsigned> unused;
-        for (auto& p : and_gates_)
-          if (!used.count(p.first))
-            unused.insert(p.first);
-        for (unsigned v : unused)
-          and_gates_.erase(v);
+        // Erase and_gates that were not seen in the above
+        // exploration.
+        auto e = and_gates_.end();
+        for (auto i = and_gates_.begin(); i != e;)
+          {
+            if (!used[i->first/2])
+              i = and_gates_.erase(i);
+            else
+              ++i;
+          }
       }
 
       void
@@ -244,7 +255,7 @@ namespace spot
       std::vector<bool> v(size);
       for (unsigned i = 0; i < size; ++i)
         {
-          v[i] = s % 2;
+          v[i] = s & 1;
           s >>= 1;
         }
       return v;
@@ -277,7 +288,7 @@ namespace spot
           unsigned st0 = bdd_var(all);
           for (unsigned i = 0; i < size; ++i)
             {
-              b &= s % 2 ? bdd_ithvar(st0 + i) : bdd_nithvar(st0 + i);
+              b &= (s & 1)  ? bdd_ithvar(st0 + i) : bdd_nithvar(st0 + i);
               s >>= 1;
             }
         }
diff --git a/tests/core/ltlsynt.test b/tests/core/ltlsynt.test
index bdd0de907..5a1886e8c 100644
--- a/tests/core/ltlsynt.test
+++ b/tests/core/ltlsynt.test
@@ -61,11 +61,11 @@ aag 23 1 2 1 16
 26 4 6
 28 2 26
 30 3 26
-36 29 31
-38 25 36
-40 17 23
-42 13 40
-44 42 38
+36 17 23
+38 13 36
+40 29 31
+42 25 40
+44 38 42
 46 25 29
 i0 a
 o0 b

From 2fa68cc44d70d23f58043fdf7d9186d4595ff05a Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Thu, 26 Sep 2019 14:10:09 +0200
Subject: [PATCH 07/13] * doc/org/index.org: Clarify license implications.

---
 doc/org/index.org | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/doc/org/index.org b/doc/org/index.org
index 1d1292bbe..f80f1c939 100644
--- a/doc/org/index.org
+++ b/doc/org/index.org
@@ -59,9 +59,9 @@ The latest version is *{{{LASTRELEASE}}}* and was released on
 
 Spot is distributed under a [[http://www.gnu.org/licenses/gpl-3.0.html][GNU GPL v3 license]].
 
-A consequence is that if you distribute a tool built using Spot, you
-*must* make the source code of that tool available as well, under a
-compatible license.
+One consequence is that any work based on Spot is covered by that
+license as well.  For instance if you distribute a tool that [[https://en.wikipedia.org/wiki/GNU_General_Public_License#Linking_and_derived_works][links
+with]] Spot, you should distribute the source code of that tool as well.
 
 * Staying in touch
 

From 362682c7cd062cc685451e0e24e74a1db0c2bb20 Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Thu, 26 Sep 2019 17:16:28 +0200
Subject: [PATCH 08/13] * .gitlab-ci.yml (arch-gcc-glibcxxdebug): Do not call
 env.

---
 .gitlab-ci.yml | 1 -
 1 file changed, 1 deletion(-)

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 6db16b71e..5f973ff66 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -116,7 +116,6 @@ arch-gcc-glibcxxdebug:
     - /wip/
   image: registry.lrde.epita.fr/spot-arch
   script:
-    - env
     - autoreconf -vfi
     - ./configure --enable-devel --enable-c++17 --enable-glibcxx-debug
     - make

From 34cf0491ebe549c02d048a4812fee98fd9330291 Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Fri, 27 Sep 2019 13:50:20 +0200
Subject: [PATCH 09/13] * tests/python/_product_weak.ipynb: Work around jupyter
 timeouts.

---
 tests/python/_product_weak.ipynb | 10463 +++++++----------------------
 1 file changed, 2566 insertions(+), 7897 deletions(-)

diff --git a/tests/python/_product_weak.ipynb b/tests/python/_product_weak.ipynb
index 5defa2ef4..7c31ec51a 100644
--- a/tests/python/_product_weak.ipynb
+++ b/tests/python/_product_weak.ipynb
@@ -24,7 +24,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "auts = [a for a in spot.automata(\"\"\"\n",
+    "auts = list(spot.automata(\"\"\"\n",
     "HOA: v1\n",
     "name: \"a\"\n",
     "States: 2\n",
@@ -106,20 +106,40 @@
     "[!0] 0 {0}\n",
     "[0] 0\n",
     "--END--\n",
-    "\"\"\")]"
+    "\"\"\"))"
    ]
   },
   {
    "cell_type": "code",
    "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "6"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "len(auts)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
    "metadata": {
     "scrolled": false
    },
    "outputs": [
     {
      "data": {
-      "text/html": [
-       "<div style='vertical-align:text-top;display:inline-block;'><?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
+      "image/svg+xml": [
+       "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
        "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
        " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
        "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
@@ -166,8 +186,19 @@
        "<text text-anchor=\"middle\" x=\"135\" y=\"-57.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">1</text>\n",
        "</g>\n",
        "</g>\n",
-       "</svg>\n",
-       "</div><div style='vertical-align:text-top;display:inline-block;'><?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
+       "</svg>\n"
+      ],
+      "text/plain": [
+       "<spot.twa_graph; proxy of <Swig Object of type 'std::shared_ptr< spot::twa_graph > *' at 0x7fa5b04de690> >"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    },
+    {
+     "data": {
+      "text/html": [
+       "<div style='vertical-align:text-top;display:inline-block;'><?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
        "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
        " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
        "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
@@ -262,6 +293,74 @@
        "</g>\n",
        "</g>\n",
        "</svg>\n",
+       "</div><div style='vertical-align:text-top;display:inline-block;'><?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
+       "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
+       " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
+       "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
+       " -->\n",
+       "<!-- Pages: 1 -->\n",
+       "<svg width=\"217pt\" height=\"212pt\"\n",
+       " viewBox=\"0.00 0.00 217.00 211.80\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
+       "<g id=\"graph0\" class=\"graph\" transform=\"scale(1 1) rotate(0) translate(4 207.8)\">\n",
+       "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-207.8 213,-207.8 213,4 -4,4\"/>\n",
+       "<text text-anchor=\"start\" x=\"81.5\" y=\"-173.6\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[Büchi]</text>\n",
+       "<!-- I -->\n",
+       "<!-- 0 -->\n",
+       "<g id=\"node2\" class=\"node\">\n",
+       "<title>0</title>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"#000000\" cx=\"69\" cy=\"-63\" rx=\"27\" ry=\"18\"/>\n",
+       "<ellipse fill=\"none\" stroke=\"#000000\" cx=\"69\" cy=\"-63\" rx=\"31\" ry=\"22\"/>\n",
+       "<text text-anchor=\"start\" x=\"59\" y=\"-59.3\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">1,1</text>\n",
+       "</g>\n",
+       "<!-- I&#45;&gt;0 -->\n",
+       "<g id=\"edge1\" class=\"edge\">\n",
+       "<title>I&#45;&gt;0</title>\n",
+       "<path fill=\"none\" stroke=\"#000000\" d=\"M1.2693,-63C4.4736,-63 17.2281,-63 30.8193,-63\"/>\n",
+       "<polygon fill=\"#000000\" stroke=\"#000000\" points=\"37.9568,-63 30.9568,-66.1501 34.4568,-63 30.9568,-63.0001 30.9568,-63.0001 30.9568,-63.0001 34.4568,-63 30.9567,-59.8501 37.9568,-63 37.9568,-63\"/>\n",
+       "</g>\n",
+       "<!-- 1 -->\n",
+       "<g id=\"node3\" class=\"node\">\n",
+       "<title>1</title>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"#000000\" cx=\"178\" cy=\"-109\" rx=\"27\" ry=\"18\"/>\n",
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+       "<text text-anchor=\"start\" x=\"168\" y=\"-105.3\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">0,0</text>\n",
+       "</g>\n",
+       "<!-- 0&#45;&gt;1 -->\n",
+       "<g id=\"edge2\" class=\"edge\">\n",
+       "<title>0&#45;&gt;1</title>\n",
+       "<path fill=\"none\" stroke=\"#000000\" d=\"M95.6644,-74.2529C110.444,-80.4901 128.9569,-88.3029 144.683,-94.9396\"/>\n",
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+       "<text text-anchor=\"start\" x=\"120\" y=\"-90.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">a</text>\n",
+       "</g>\n",
+       "<!-- 2 -->\n",
+       "<g id=\"node4\" class=\"node\">\n",
+       "<title>2</title>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"#000000\" cx=\"178\" cy=\"-18\" rx=\"27\" ry=\"18\"/>\n",
+       "<text text-anchor=\"start\" x=\"168\" y=\"-14.3\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">2,2</text>\n",
+       "</g>\n",
+       "<!-- 0&#45;&gt;2 -->\n",
+       "<g id=\"edge3\" class=\"edge\">\n",
+       "<title>0&#45;&gt;2</title>\n",
+       "<path fill=\"none\" stroke=\"#000000\" d=\"M95.9438,-51.8764C111.7203,-45.3632 131.6776,-37.1239 147.9597,-30.4019\"/>\n",
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+       "<text text-anchor=\"start\" x=\"118\" y=\"-44.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">!a</text>\n",
+       "</g>\n",
+       "<!-- 1&#45;&gt;1 -->\n",
+       "<g id=\"edge4\" class=\"edge\">\n",
+       "<title>1&#45;&gt;1</title>\n",
+       "<path fill=\"none\" stroke=\"#000000\" d=\"M168.1222,-129.9908C166.9027,-140.0872 170.1953,-149 178,-149 183.8535,-149 187.169,-143.9866 187.9464,-137.2204\"/>\n",
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+       "<text text-anchor=\"middle\" x=\"178\" y=\"-152.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">1</text>\n",
+       "</g>\n",
+       "<!-- 2&#45;&gt;2 -->\n",
+       "<g id=\"edge5\" class=\"edge\">\n",
+       "<title>2&#45;&gt;2</title>\n",
+       "<path fill=\"none\" stroke=\"#000000\" d=\"M168.4312,-35.0373C166.4784,-44.8579 169.668,-54 178,-54 184.249,-54 187.6054,-48.8576 188.0692,-42.1433\"/>\n",
+       "<polygon fill=\"#000000\" stroke=\"#000000\" points=\"187.5688,-35.0373 191.2029,-41.7987 187.8147,-38.5287 188.0606,-42.02 188.0606,-42.02 188.0606,-42.02 187.8147,-38.5287 184.9184,-42.2413 187.5688,-35.0373 187.5688,-35.0373\"/>\n",
+       "<text text-anchor=\"middle\" x=\"178\" y=\"-57.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">1</text>\n",
+       "</g>\n",
+       "</g>\n",
+       "</svg>\n",
        "</div>"
       ],
       "text/plain": [
@@ -279,54 +378,6 @@
        " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
        "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
        " -->\n",
-       "<!-- Title: a Pages: 1 -->\n",
-       "<svg width=\"161pt\" height=\"115pt\"\n",
-       " viewBox=\"0.00 0.00 161.00 115.00\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
-       "<g id=\"graph0\" class=\"graph\" transform=\"scale(1 1) rotate(0) translate(4 111)\">\n",
-       "<title>a</title>\n",
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-       "<text text-anchor=\"start\" x=\"65.5\" y=\"-76.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[all]</text>\n",
-       "<!-- I -->\n",
-       "<!-- 1 -->\n",
-       "<g id=\"node2\" class=\"node\">\n",
-       "<title>1</title>\n",
-       "<ellipse fill=\"#ffffaa\" stroke=\"#000000\" cx=\"56\" cy=\"-18\" rx=\"18\" ry=\"18\"/>\n",
-       "<text text-anchor=\"middle\" x=\"56\" y=\"-14.3\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">1</text>\n",
-       "</g>\n",
-       "<!-- I&#45;&gt;1 -->\n",
-       "<g id=\"edge1\" class=\"edge\">\n",
-       "<title>I&#45;&gt;1</title>\n",
-       "<path fill=\"none\" stroke=\"#000000\" d=\"M1.1233,-18C4.178,-18 17.9448,-18 30.9241,-18\"/>\n",
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-       "</g>\n",
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-       "<title>1&#45;&gt;0</title>\n",
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-       "<title>0&#45;&gt;0</title>\n",
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-       "<text text-anchor=\"middle\" x=\"135\" y=\"-57.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">1</text>\n",
-       "</g>\n",
-       "</g>\n",
-       "</svg>\n",
-       "</div><div style='vertical-align:text-top;display:inline-block;'><?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
-       "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
-       " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
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        " viewBox=\"0.00 0.00 171.00 124.80\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
@@ -451,6 +502,130 @@
        "</g>\n",
        "</g>\n",
        "</svg>\n",
+       "</div><div style='vertical-align:text-top;display:inline-block;'><?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
+       "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
+       " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
+       "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
+       " -->\n",
+       "<!-- Pages: 1 -->\n",
+       "<svg width=\"354pt\" height=\"324pt\"\n",
+       " viewBox=\"0.00 0.00 354.00 323.80\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
+       "<g id=\"graph0\" class=\"graph\" transform=\"scale(1 1) rotate(0) translate(4 319.8)\">\n",
+       "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-319.8 350,-319.8 350,4 -4,4\"/>\n",
+       "<text text-anchor=\"start\" x=\"150\" y=\"-285.6\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[Büchi]</text>\n",
+       "<!-- I -->\n",
+       "<!-- 0 -->\n",
+       "<g id=\"node2\" class=\"node\">\n",
+       "<title>0</title>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"#000000\" cx=\"69\" cy=\"-132\" rx=\"27\" ry=\"18\"/>\n",
+       "<ellipse fill=\"none\" stroke=\"#000000\" cx=\"69\" cy=\"-132\" rx=\"31\" ry=\"22\"/>\n",
+       "<text text-anchor=\"start\" x=\"59\" y=\"-128.3\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">1,1</text>\n",
+       "</g>\n",
+       "<!-- I&#45;&gt;0 -->\n",
+       "<g id=\"edge1\" class=\"edge\">\n",
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-    "autslen = len(auts)\n",
-    "# We have trouble with Jupyter on i386, where running the full loop abort with some low-level \n",
-    "# exeptions from Jupyter client. \n",
-    "for left in auts[0:autslen//2]:\n",
-    "    for right in auts:\n",
-    "        display_inline(left, right, spot.product(left, right))"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 4,
-   "metadata": {},
-   "outputs": [
-    {
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      },
      "metadata": {},
      "output_type": "display_data"
-    },
+    }
+   ],
+   "source": [
+    "autslen = len(auts)\n",
+    "# In a previous version we used to iterate over all possible left automata with \"for left in auts:\"\n",
+    "# however we had trouble with Jupyter on i386, where running the full loop abort with some low-level \n",
+    "# exeptions from Jupyter client.   Halving the loop helped for some times, but then the timeout\n",
+    "# came back.   So we do one left automaton at at time.\n",
+    "left = auts[0]\n",
+    "display(left)\n",
+    "for right in auts:\n",
+    "    display_inline(right, spot.product(left, right), spot.product_or(left, right))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {},
+   "outputs": [
     {
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      },
      "metadata": {},
      "output_type": "display_data"
-    },
+    }
+   ],
+   "source": [
+    "left = auts[1]\n",
+    "display(left)\n",
+    "for right in auts:\n",
+    "    display_inline(right, spot.product(left, right), spot.product_or(left, right))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [
     {
      "data": {
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-    "for left in auts[0:autslen//2]:\n",
-    "    for right in auts:\n",
-    "        display_inline(left, right, spot.product_or(left, right))"
+    "left = auts[2]\n",
+    "display(left)\n",
+    "for right in auts:\n",
+    "    display_inline(right, spot.product(left, right), spot.product_or(left, right))"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
-   "metadata": {
-    "scrolled": false
-   },
+   "execution_count": 7,
+   "metadata": {},
    "outputs": [
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@@ -11244,11 +5538,24 @@
      },
      "metadata": {},
      "output_type": "display_data"
-    },
+    }
+   ],
+   "source": [
+    "left = auts[3]\n",
+    "display(left)\n",
+    "for right in auts:\n",
+    "    display_inline(right, spot.product(left, right), spot.product_or(left, right))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 8,
+   "metadata": {},
+   "outputs": [
     {
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      },
      "metadata": {},
      "output_type": "display_data"
-    },
+    }
+   ],
+   "source": [
+    "left = auts[4]\n",
+    "display(left)\n",
+    "for right in auts:\n",
+    "    display_inline(right, spot.product(left, right), spot.product_or(left, right))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [
     {
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+       "<polygon fill=\"#000000\" stroke=\"#000000\" points=\"146.1875,-35.5938 150.4229,-41.9957 146.7507,-39.0481 147.3139,-42.5025 147.3139,-42.5025 147.3139,-42.5025 146.7507,-39.0481 144.2049,-43.0094 146.1875,-35.5938 146.1875,-35.5938\"/>\n",
+       "<text text-anchor=\"start\" x=\"135.5\" y=\"-85.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">d</text>\n",
+       "</g>\n",
+       "</g>\n",
+       "</svg>\n",
+       "</div><div style='vertical-align:text-top;display:inline-block;'><?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n",
+       "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n",
+       " \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n",
+       "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
+       " -->\n",
+       "<!-- Pages: 1 -->\n",
        "<svg width=\"244pt\" height=\"159pt\"\n",
        " viewBox=\"0.00 0.00 244.00 159.00\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
        "<g id=\"graph0\" class=\"graph\" transform=\"scale(1 1) rotate(0) translate(4 155)\">\n",
@@ -13288,43 +7951,48 @@
        "<!-- Generated by graphviz version 2.40.1 (20161225.0304)\n",
        " -->\n",
        "<!-- Pages: 1 -->\n",
-       "<svg width=\"122pt\" height=\"161pt\"\n",
-       " viewBox=\"0.00 0.00 122.00 161.00\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
-       "<g id=\"graph0\" class=\"graph\" transform=\"scale(1 1) rotate(0) translate(4 157)\">\n",
-       "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-157 118,-157 118,4 -4,4\"/>\n",
-       "<text text-anchor=\"start\" x=\"8\" y=\"-138.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">Inf(</text>\n",
-       "<text text-anchor=\"start\" x=\"30\" y=\"-138.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
-       "<text text-anchor=\"start\" x=\"46\" y=\"-138.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">) | Fin(</text>\n",
-       "<text text-anchor=\"start\" x=\"86\" y=\"-138.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
-       "<text text-anchor=\"start\" x=\"102\" y=\"-138.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">)</text>\n",
-       "<text text-anchor=\"start\" x=\"11.5\" y=\"-124.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[Streett&#45;like 1]</text>\n",
+       "<svg width=\"252pt\" height=\"159pt\"\n",
+       " viewBox=\"0.00 0.00 252.00 159.00\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\">\n",
+       "<g id=\"graph0\" class=\"graph\" transform=\"scale(1 1) rotate(0) translate(4 155)\">\n",
+       "<polygon fill=\"#ffffff\" stroke=\"transparent\" points=\"-4,4 -4,-155 248,-155 248,4 -4,4\"/>\n",
+       "<text text-anchor=\"start\" x=\"8\" y=\"-136.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">(Inf(</text>\n",
+       "<text text-anchor=\"start\" x=\"33\" y=\"-136.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
+       "<text text-anchor=\"start\" x=\"49\" y=\"-136.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">) | Fin(</text>\n",
+       "<text text-anchor=\"start\" x=\"89\" y=\"-136.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
+       "<text text-anchor=\"start\" x=\"105\" y=\"-136.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">)) &amp; (Inf(</text>\n",
+       "<text text-anchor=\"start\" x=\"156\" y=\"-136.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#ff4da0\">❶</text>\n",
+       "<text text-anchor=\"start\" x=\"172\" y=\"-136.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">) | Fin(</text>\n",
+       "<text text-anchor=\"start\" x=\"212\" y=\"-136.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#ff4da0\">❶</text>\n",
+       "<text text-anchor=\"start\" x=\"228\" y=\"-136.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">))</text>\n",
+       "<text text-anchor=\"start\" x=\"76.5\" y=\"-122.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">[Streett&#45;like 2]</text>\n",
        "<!-- I -->\n",
        "<!-- 0 -->\n",
        "<g id=\"node2\" class=\"node\">\n",
        "<title>0</title>\n",
-       "<ellipse fill=\"#ffffaa\" stroke=\"#000000\" cx=\"76\" cy=\"-18\" rx=\"18\" ry=\"18\"/>\n",
-       "<text text-anchor=\"middle\" x=\"76\" y=\"-14.3\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">0</text>\n",
+       "<ellipse fill=\"#ffffaa\" stroke=\"#000000\" cx=\"141\" cy=\"-18\" rx=\"27\" ry=\"18\"/>\n",
+       "<text text-anchor=\"start\" x=\"131\" y=\"-14.3\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">0,0</text>\n",
        "</g>\n",
        "<!-- I&#45;&gt;0 -->\n",
        "<g id=\"edge1\" class=\"edge\">\n",
        "<title>I&#45;&gt;0</title>\n",
-       "<path fill=\"none\" stroke=\"#000000\" d=\"M21.1233,-18C24.178,-18 37.9448,-18 50.9241,-18\"/>\n",
-       "<polygon fill=\"#000000\" stroke=\"#000000\" points=\"57.9807,-18 50.9808,-21.1501 54.4807,-18 50.9807,-18.0001 50.9807,-18.0001 50.9807,-18.0001 54.4807,-18 50.9807,-14.8501 57.9807,-18 57.9807,-18\"/>\n",
+       "<path fill=\"none\" stroke=\"#000000\" d=\"M77.2244,-18C80.383,-18 93.3969,-18 106.8528,-18\"/>\n",
+       "<polygon fill=\"#000000\" stroke=\"#000000\" points=\"113.8798,-18 106.8799,-21.1501 110.3798,-18 106.8798,-18.0001 106.8798,-18.0001 106.8798,-18.0001 110.3798,-18 106.8798,-14.8501 113.8798,-18 113.8798,-18\"/>\n",
        "</g>\n",
        "<!-- 0&#45;&gt;0 -->\n",
        "<g id=\"edge2\" class=\"edge\">\n",
        "<title>0&#45;&gt;0</title>\n",
-       "<path fill=\"none\" stroke=\"#000000\" d=\"M72.7643,-35.7817C72.2144,-45.3149 73.293,-54 76,-54 77.988,-54 79.0977,-49.3161 79.3292,-43.0521\"/>\n",
-       "<polygon fill=\"#000000\" stroke=\"#000000\" points=\"79.2357,-35.7817 82.4756,-42.7406 79.2808,-39.2814 79.3258,-42.7812 79.3258,-42.7812 79.3258,-42.7812 79.2808,-39.2814 76.1761,-42.8217 79.2357,-35.7817 79.2357,-35.7817\"/>\n",
-       "<text text-anchor=\"start\" x=\"69.5\" y=\"-72.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">!d</text>\n",
-       "<text text-anchor=\"start\" x=\"68\" y=\"-57.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
+       "<path fill=\"none\" stroke=\"#000000\" d=\"M137.02,-36.1527C136.4077,-45.5391 137.7344,-54 141,-54 143.3982,-54 144.7507,-49.437 145.0575,-43.2953\"/>\n",
+       "<polygon fill=\"#000000\" stroke=\"#000000\" points=\"144.98,-36.1527 148.2058,-43.1181 145.018,-39.6525 145.056,-43.1523 145.056,-43.1523 145.056,-43.1523 145.018,-39.6525 141.9062,-43.1865 144.98,-36.1527 144.98,-36.1527\"/>\n",
+       "<text text-anchor=\"start\" x=\"134.5\" y=\"-71.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">!d</text>\n",
+       "<text text-anchor=\"start\" x=\"125\" y=\"-57.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#1f78b4\">⓿</text>\n",
+       "<text text-anchor=\"start\" x=\"141\" y=\"-57.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#ff4da0\">❶</text>\n",
        "</g>\n",
        "<!-- 0&#45;&gt;0 -->\n",
        "<g id=\"edge3\" class=\"edge\">\n",
        "<title>0&#45;&gt;0</title>\n",
-       "<path fill=\"none\" stroke=\"#000000\" d=\"M70.9906,-35.5771C67.5451,-56.718 69.2148,-84 76,-84 82.043,-84 84.0285,-62.3596 81.9564,-42.6907\"/>\n",
-       "<polygon fill=\"#000000\" stroke=\"#000000\" points=\"81.0094,-35.5771 85.0556,-42.1002 81.4713,-39.0465 81.9332,-42.5159 81.9332,-42.5159 81.9332,-42.5159 81.4713,-39.0465 78.8107,-42.9316 81.0094,-35.5771 81.0094,-35.5771\"/>\n",
-       "<text text-anchor=\"start\" x=\"71.5\" y=\"-87.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">d</text>\n",
+       "<path fill=\"none\" stroke=\"#000000\" d=\"M134.8125,-35.5938C130.6875,-56.125 132.75,-82 141,-82 148.3154,-82 150.7658,-61.6553 148.3511,-42.7315\"/>\n",
+       "<polygon fill=\"#000000\" stroke=\"#000000\" points=\"147.1875,-35.5938 151.4229,-41.9957 147.7507,-39.0481 148.3139,-42.5025 148.3139,-42.5025 148.3139,-42.5025 147.7507,-39.0481 145.2049,-43.0094 147.1875,-35.5938 147.1875,-35.5938\"/>\n",
+       "<text text-anchor=\"start\" x=\"136.5\" y=\"-85.8\" font-family=\"Lato\" font-size=\"14.00\" fill=\"#000000\">d</text>\n",
        "</g>\n",
        "</g>\n",
        "</svg>\n",
@@ -13390,9 +8058,10 @@
     }
    ],
    "source": [
-    "for left in auts[autslen//2:]:\n",
-    "    for right in auts:\n",
-    "        display_inline(left, right, spot.product_or(left, right))"
+    "left = auts[5]\n",
+    "display(left)\n",
+    "for right in auts:\n",
+    "    display_inline(right, spot.product(left, right), spot.product_or(left, right))"
    ]
   },
   {
@@ -13419,7 +8088,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.7rc1"
+   "version": "3.7.4+"
   }
  },
  "nbformat": 4,

From 7e44016d38dae01ab7b0f2bf9ff543b9ec777d38 Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Fri, 27 Sep 2019 18:00:52 +0200
Subject: [PATCH 10/13] [buddy] improve C++ backward compatibility around
 bdd_allsat change

* src/bddx.h (bdd_allsat): Add a version with the old prototype.
---
 buddy/src/bddx.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/buddy/src/bddx.h b/buddy/src/bddx.h
index 573569c7f..48018ccec 100644
--- a/buddy/src/bddx.h
+++ b/buddy/src/bddx.h
@@ -269,6 +269,10 @@ typedef void (*bdd2inthandler)(int,int);
 typedef int  (*bddsizehandler)(void);
 typedef void (*bddfilehandler)(FILE *, int);
 typedef void (*bddallsathandler)(signed char*, int);
+// The historical type of bddallsathandler is the following,
+// unfortunately the signedness of char* is implementation defined.
+// Now we have to support both for backward compatibility.
+typedef void (*bddallsathandler_old)(char*, int);
 
 BUDDY_API bddinthandler  bdd_error_hook(bddinthandler);
 BUDDY_API bddgbchandler  bdd_gbc_hook(bddgbchandler);
@@ -613,6 +617,7 @@ protected:
    friend bdd      bdd_fullsatone(const bdd &);
    friend bdd      bdd_satprefix(bdd &);
    friend void     bdd_allsat(const bdd &r, bddallsathandler handler);
+   friend void     bdd_allsat(const bdd &r, bddallsathandler_old handler);
    friend double   bdd_satcount(const bdd &);
    friend double   bdd_satcountset(const bdd &, const bdd &);
    friend double   bdd_satcountln(const bdd &);
@@ -829,6 +834,10 @@ inline bdd bdd_satprefix(bdd &r)
 inline void bdd_allsat(const bdd &r, bddallsathandler handler)
 { bdd_allsat(r.root, handler); }
 
+// backward compatibility for C++ users
+inline void bdd_allsat(const bdd &r, bddallsathandler_old handler)
+{ bdd_allsat(r.root, (bddallsathandler)handler); }
+
 inline double bdd_satcount(const bdd &r)
 { return bdd_satcount(r.root); }
 

From 5bf91077f4525ccac8fadd3d667f5d05d8c7801f Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Fri, 27 Sep 2019 06:51:00 +0200
Subject: [PATCH 11/13] * .gitlab-ci.yml (raspbian): Restrict to branches.

---
 .gitlab-ci.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 5f973ff66..716c63f4e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -287,6 +287,8 @@ publish-unstable:
 
 raspbian:
   stage: build
+  only:
+    - branches
   tags:
     - armv7
   script:

From 1102def717b3bae893dc3f728d1f9090a0212ce8 Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Thu, 26 Sep 2019 15:19:06 +0200
Subject: [PATCH 12/13] Release Spot 2.8.2

* NEWS, configure.ac, doc/org/setup.org: Update version to 2.8.2.
---
 NEWS              |  8 +++++++-
 configure.ac      |  2 +-
 doc/org/setup.org | 10 +++++-----
 3 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/NEWS b/NEWS
index 7201d96e9..2fac860d3 100644
--- a/NEWS
+++ b/NEWS
@@ -1,4 +1,4 @@
-New in spot 2.8.1.dev (not yet released)
+New in spot 2.8.2 (2019-09-27)
 
   Command-line tools:
 
@@ -10,6 +10,12 @@ New in spot 2.8.1.dev (not yet released)
     transition-based acceptance and universal initial states would
     fail with "set_init_state() called with nonexisting state".
 
+  - The numbering of nodes in the AIGER output of ltlsynt was
+    architecture dependent.
+
+  - Various compilation issues.  In particular, this release is the
+    first one that can be compiled (as pass tests) on a Raspberry PI.
+
 New in spot 2.8.1 (2019-07-18)
 
   Command-line tools:
diff --git a/configure.ac b/configure.ac
index 79d7d6e08..b7a4b8354 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,7 +21,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 AC_PREREQ([2.63])
-AC_INIT([spot], [2.8.1.dev], [spot@lrde.epita.fr])
+AC_INIT([spot], [2.8.2], [spot@lrde.epita.fr])
 AC_CONFIG_AUX_DIR([tools])
 AC_CONFIG_MACRO_DIR([m4])
 AM_INIT_AUTOMAKE([1.11 gnu tar-ustar color-tests parallel-tests])
diff --git a/doc/org/setup.org b/doc/org/setup.org
index 03863dcd4..c70f965ac 100644
--- a/doc/org/setup.org
+++ b/doc/org/setup.org
@@ -1,11 +1,11 @@
 #+OPTIONS: H:2 num:nil toc:t html-postamble:nil ^:nil
 #+EMAIL: spot@lrde.epita.fr
 #+HTML_LINK_HOME: index.html
-#+MACRO: SPOTVERSION 2.8.1
-#+MACRO: LASTRELEASE 2.8.1
-#+MACRO: LASTTARBALL [[http://www.lrde.epita.fr/dload/spot/spot-2.8.1.tar.gz][=spot-2.8.1.tar.gz=]]
-#+MACRO: LASTNEWS [[https://gitlab.lrde.epita.fr/spot/spot/blob/spot-2-8-1/NEWS][summary of the changes]]
-#+MACRO: LASTDATE 2019-07-18
+#+MACRO: SPOTVERSION 2.8.2
+#+MACRO: LASTRELEASE 2.8.2
+#+MACRO: LASTTARBALL [[http://www.lrde.epita.fr/dload/spot/spot-2.8.2.tar.gz][=spot-2.8.2.tar.gz=]]
+#+MACRO: LASTNEWS [[https://gitlab.lrde.epita.fr/spot/spot/blob/spot-2-8-2/NEWS][summary of the changes]]
+#+MACRO: LASTDATE 2019-09-27
 
 #+ATTR_HTML: :id spotlogo
 [[file:spot2.svg]]

From cbfcee9449138167af2d2a844333b3a09490eeb3 Mon Sep 17 00:00:00 2001
From: Alexandre Duret-Lutz <adl@lrde.epita.fr>
Date: Fri, 27 Sep 2019 06:47:31 +0200
Subject: [PATCH 13/13] Bump version to 2.8.2.dev

* NEWS, configure.ac: Here.
---
 NEWS         | 4 ++++
 configure.ac | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/NEWS b/NEWS
index 2fac860d3..6ee7113fa 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,7 @@
+New in spot 2.8.2.dev  (not yet released)
+
+  Nothing yet.
+
 New in spot 2.8.2 (2019-09-27)
 
   Command-line tools:
diff --git a/configure.ac b/configure.ac
index b7a4b8354..407cda7c3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,7 +21,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 AC_PREREQ([2.63])
-AC_INIT([spot], [2.8.2], [spot@lrde.epita.fr])
+AC_INIT([spot], [2.8.2.dev], [spot@lrde.epita.fr])
 AC_CONFIG_AUX_DIR([tools])
 AC_CONFIG_MACRO_DIR([m4])
 AM_INIT_AUTOMAKE([1.11 gnu tar-ustar color-tests parallel-tests])