Add benchmark for our DTGBA SAT-minimization.

* bench/dtgbasat/: New directory.
* bench/Makefile.am: New file.
* configure.ac, README: Adjust.

bench/dtgbasat/prepare.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+ltlfilt=../../src/bin/ltlfilt
+ltl2tgba=../../src/bin/ltl2tgba
+dstar2tgba=../../src/bin/dstar2tgba
+
+# Rename all formulas using a b c... suppress duplicates.
+$ltlfilt -q --relabel=abc -u formulas > nodups.ltl
+
+while read f; do
+  acc=`$ltl2tgba "$f" --low -a --stats="%a"`
+  acc2=`$ltl2tgba "$f" -D --stats="%a"`
+  if $ltlfilt -f "$f" --obligation >/dev/null; then
+     echo "$f, WDBA, $acc, $acc2"
+  elif test `$ltl2tgba "$f" -D --stats="%d"` = 1; then
+     echo "$f, trad, $acc, $acc2"
+  elif test `$ltl2tgba "$f" -x tba-det -D --stats="%d"` = 1; then
+     echo "$f, TCONG, $acc, $acc2"
+  elif test `$ltlfilt --remove-wm -f "$f" -l | ltl2dstar --ltl2nba=spin:$ltl2tgba@-sD - - | $dstar2tgba -D --low --stats="%d"` = 1; then
+     echo "$f, DRA, $acc, $acc2"
+  else
+     echo "$f, not DBA-realizable, $acc, $acc2"
+  fi
+done < nodups.ltl | tee info.ltl