src/HOL/Modelcheck/Example.thy

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/HOL/Modelcheck/Example.thy	Fri May 16 15:29:41 1997 +0200
@@ -0,0 +1,33 @@
+(*  Title:      HOL/Modelcheck/Example.thy
+    ID:         $Id$
+    Author:     Olaf Mueller, Jan Philipps, Robert Sandner
+    Copyright   1997  TU Muenchen
+*)
+
+Example = MCSyn + 
+
+
+types
+    state = "bool * bool * bool"
+
+consts
+
+  INIT :: "state pred"
+  N    :: "[state,state] => bool"
+  reach:: "state pred"
+
+defs
+  
+  INIT_def "INIT x == ~(fst x)&~(fst (snd x))&~(snd (snd x))"
+
+  N_def   "N x y  == let x1 = fst(x); x2 = fst(snd(x)); x3 = snd(snd(x));   
+	                  y1 = fst(y); y2 = fst(snd(y)); y3 = snd(snd(y)) 
+                     in (~x1&~x2&~x3 & y1&~y2&~y3) |   
+	                (x1&~x2&~x3 & ~y1&~y2&~y3) |   
+	                (x1&~x2&~x3 & y1&y2&y3)    "
+  
+  reach_def "reach  == mu (%Q x. INIT x | (? y. Q y & N y x))"
+  
+
+end
+