lbtt_parse: add support for state-based acceptance

* src/tgbaalgos/lbtt.cc (lbtt_read_gba): New function.
(lbtt_parse): Call lbtt_read_gba.
* src/tgbatest/lbttparse.test: Add a test.

src/tgbatest/lbttparse.test

@@ -39,3 +39,29 @@ do
   l=`expr $st \* 2 + $tr + 1`
   test "$s" -eq "$l"
 done
+
+
+# This is the output of 'lbt' on the formula 'U p0 p1'.
+cat >Up0p1 <<EOF
+4 1
+0 1 -1
+1 p0
+2 p1
+-1
+1 0 -1
+1 p0
+2 p1
+-1
+2 0 0 -1
+3 t
+-1
+3 0 0 -1
+3 t
+-1
+EOF
+
+run 0 ../ltl2tgba -ks -XL Up0p1 > size
+test "`cat size | sed -n 's/states: //p'`" = 4
+test "`cat size | sed -n 's/transitions: //p'`" = 6
+
+