autfilt: add a --merge-transitions option

* src/bin/randaut.cc: Fix memory leak.
* src/bin/autfilt.cc: Add a --merge-transitions option.
* src/tgbatest/readsave.test: Rewrite using randaut and autfilt.

src/bin/autfilt.cc

@@ -59,6 +59,7 @@ Convert, transform, and filter Büchi automata.\n\
 #define OPT_RANDOMIZE 6
 #define OPT_SEED 7
 #define OPT_PRODUCT 8
+#define OPT_MERGE 9
 
 static const argp_option options[] =
   {
@@ -117,7 +118,9 @@ static const argp_option options[] =
     { "%%", 0, 0, OPTION_DOC | OPTION_NO_USAGE,
       "a single %", 0 },
     /**************************************************/
-    { 0, 0, 0, 0, "Transformation:", -1 },
+    { 0, 0, 0, 0, "Transformations:", 5 },
+    { "merge-transitions", OPT_MERGE, 0, 0,
+      "merge transitions with same destination and acceptance", 0 },
     { "product", OPT_PRODUCT, "FILENAME", 0,
       "build the product with FILENAME", 0 },
     { "randomize", OPT_RANDOMIZE, "s|t", OPTION_ARG_OPTIONAL,
@@ -149,6 +152,7 @@ static bool randomize_tr = false;
 static int opt_seed = 0;
 static auto dict = spot::make_bdd_dict();
 static spot::tgba_digraph_ptr opt_product = nullptr;
+static bool opt_merge = false;
 
 static int
 to_int(const char* s)
@@ -210,6 +214,9 @@ parse_opt(int key, char* arg, struct argp_state*)
 	  format = Lbtt;
 	}
       break;
+    case OPT_MERGE:
+      opt_merge = true;
+      break;
     case OPT_PRODUCT:
       {
 	spot::hoa_parse_error_list pel;
@@ -370,6 +377,11 @@ namespace
 
       auto aut = haut->aut;
 
+      // Do this first, because it is cheap and will help most
+      // algorithms.
+      if (opt_merge)
+	aut->merge_transitions();
+
       if (opt_product)
 	aut = spot::product(std::move(aut), opt_product);
 

src/bin/randaut.cc

@@ -315,4 +315,5 @@ main(int argc, char** argv)
 	}
       flush_cout();
     }
+  spot::ltl::destroy_atomic_prop_set(aprops);
 }

src/tgbatest/readsave.test

@@ -3,7 +3,7 @@
 # Copyright (C) 2009, 2010, 2012, 2014 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
+# département Systèmes Répartis Coopératifs (SRC), Université Pierre
 # et Marie Curie.
 #
 # This file is part of Spot, a model checking library.
@@ -26,105 +26,81 @@
 
 set -e
 
-cat >input <<\EOF
-acc = c d;
-s1, "s2", "a&!b", c d;
-"s2", "state 3", "\"F\\G\"", c;
-"state 3", s1,,;
-EOF
-
-../ltl2tgba -b -X input > stdout
+autfilt=../../bin/autfilt
 
-cat >expected <<\EOF
-acc = "0" "1";
-"0", "1", "a & !b", "0" "1";
-"1", "2", "\"F\\G\"", "0";
-"2", "0", "1",;
+cat >input <<\EOF
+HOA: v1
+States: 3
+Start: 0
+AP: 3 "a" "b" "F\\G"
+acc-name: generalized-Buchi 2
+Acceptance: 2 Inf(0)&Inf(1)
+properties: trans-labels explicit-labels state-acc deterministic
+--BODY--
+State: 0 {0 1}
+[0&!1] 1
+State: 1 {0}
+[2] 2
+State: 2
+[t] 0
+--END--
 EOF
 
-# Sort out some possible inversions in the output.
-# (The order is not guaranteed by SPOT.)
-sed 's/"d" "c"/"c" "d"/g;s/!b & a/a \& !b/g' stdout > tmp_ && mv tmp_ stdout
-
-diff stdout expected
-
-mv stdout input
-run 0 ../ltl2tgba -b -X input > stdout
-
-# Sort out some possible inversions in the output.
-# (The order is not guaranteed by SPOT.)
-sed 's/"d" "c"/"c" "d"/g;s/!b & a/a \& !b/g' stdout > tmp_ && mv tmp_ stdout
-
-diff input stdout
-
-rm -f input stdout expected
+run 0 $autfilt --hoa input > stdout
+diff stdout input
 
 # Transition merging
 cat >input <<\EOF
-acc = c;
-s1, s2, "a&!b", c;
-s1, s2, "b&a", c;
-s1, s2, "!b", ;
-s2, s1, "!b", ;
-s2, s1, "a&!b", c;
-s2, s1, "b&a", c;
+HOA: v1
+States: 2
+Start: 0
+AP: 2 "a" "b"
+acc-name: Buchi
+Acceptance: 1 Inf(0)
+properties: trans-labels explicit-labels trans-acc
+--BODY--
+State: 0
+[0&1] 1 {0}
+[!1] 1
+[0&!1] 1 {0}
+State: 1
+[!1] 0
+[1&0] 0 {0}
+[0&!1] 0 {0}
+--END--
 EOF
 
 cat >expected <<\EOF
-acc = "0";
-"0", "1", "!b",;
-"0", "1", "a", "0";
-"1", "0", "!b",;
-"1", "0", "a", "0";
+HOA: v1
+States: 2
+Start: 0
+AP: 2 "a" "b"
+acc-name: Buchi
+Acceptance: 1 Inf(0)
+properties: trans-labels explicit-labels trans-acc
+--BODY--
+State: 0
+[!1] 1
+[0] 1 {0}
+State: 1
+[!1] 0
+[0] 0 {0}
+--END--
 EOF
 
-run 0 ../ltl2tgba -b -X input > stdout
+run 0 ../../bin/autfilt --merge-transitions --hoa input > stdout
 # FIXME: use are-isomorphic once it is available
+cat stdout
 diff stdout expected
 
 # Likewise, with a randomly generated TGBA.
-run 0 ../randtgba -t 1 -n 20 -d 0.2 a b -a 2 0.1 >input
-sed 's/"b & a"/"a \& b"/g;s/"a1" "a0"/"a0" "a1"/g' input > tmp_ &&
-  mv tmp_ input
-cat input
-# the first read-write can renumber the states
-run 0 ../ltl2tgba -b -X input > stdout
-sed 's/"b & a"/"a \& b"/g;s/"a1" "a0"/"a0" "a1"/g' stdout > tmp_ &&
-mv tmp_ stdout
-test `wc -l < input` = `wc -l < stdout`
-# But this second shout output the same as the first
-run 0 ../ltl2tgba -b -X input > stdout2
-sed 's/"b & a"/"a \& b"/g;s/"a1" "a0"/"a0" "a1"/g' stdout2 > tmp_ &&
-mv tmp_ stdout2
-diff stdout stdout2
-
-rm -f input stdout stdout2
-
-
-# Check the position of syntax errors in the diagnostics:
-cat >input <<\EOF
-acc = "c" "d";
-"s1", "s2", "a & !b", "c" "d";
-"s2", "state 3", "a &&", "c";
-"state 3", "s1", "1)",;
-EOF
+run 0 ../../bin/randaut -S 20 a b -d 0.2 -a 0.2 -A 2 --hoa | tee input
 
-run 2 ../ltl2tgba -b -X input > stdout 2>stderr
-cat stderr
-grep input: stderr > stderrfilt
-
-cat >expected <<EOF
-input:3.23-22: syntax error, unexpected end of formula
-input:3.21-22: missing right operand for "and operator"
-input:4.20: syntax error, unexpected closing parenthesis
-input:4.20: ignoring trailing garbage
-EOF
-
-diff stderrfilt expected
+# the first read-write can renumber the states
+run 0 $autfilt --hoa --merge-transitions input > stdout
+# FIXME: use are-ismorphic
+# diff input stdout
 
-# The diagnostic should be the same with DOS input
-perl -pi -e 's/$/\r/' input
-run 2 ../ltl2tgba -b -X input > stdout 2>stderr
-cat stderr
-grep input: stderr > stderrfilt
-diff stderrfilt expected
+# But this second output should be the same as the first
+run 0 $autfilt --hoa stdout > stdout2
+diff stdout stdout2