--- /dev/null
+digraph {
+ rankdir=LR;
+ s0a [label="s0a: {x=0,y=0}"]
+ s1a [label="s1a: {x=0,y=0}"]
+ s2 [label="s2: {0<=x=1,y=0}"]
+ s3 [label="s3: {0<=x=0,y=0}"]
+
+ s0b [label="s0b: {0<=x<1,0<=y<2}"]
+ s1b [label="s1b: {x=0,0<=y<2}"]
+
+ s0a -> s1a
+ s1a -> s2
+ s2 -> s3
+
+ s3 -> s0b
+ s0b -> s1b
+ s1b -> s3
+}