--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/HOL/SMT/Examples/cert/z3_prop_06	Tue Oct 20 10:11:30 2009 +0200
@@ -0,0 +1,10 @@
+(benchmark Isabelle
+:extrasorts ( T1)
+:extrapreds (
+  (up_1)
+  (up_2)
+  (up_3)
+ )
+:assumption (not (implies (or (and up_1 up_2) up_3) (or (implies up_1 (or (and up_3 up_2) (and up_1 up_3))) up_1)))
+:formula true
+)