increasing the number of iterations to ensure to find a counterexample by random generation

--- a/src/HOL/Predicate_Compile_Examples/IMP_1.thy	Thu Sep 09 09:11:13 2010 +0200
+++ b/src/HOL/Predicate_Compile_Examples/IMP_1.thy	Thu Sep 09 11:10:44 2010 +0200
@@ -27,7 +27,7 @@
 
 lemma
   "exec c s s' ==> exec (Seq c c) s s'"
-quickcheck[generator = predicate_compile_wo_ff, size = 2, iterations = 1, expect = counterexample]
+quickcheck[generator = predicate_compile_wo_ff, size = 2, iterations = 10, expect = counterexample]
 oops
 
 

--- a/src/HOL/Predicate_Compile_Examples/IMP_2.thy	Thu Sep 09 09:11:13 2010 +0200
+++ b/src/HOL/Predicate_Compile_Examples/IMP_2.thy	Thu Sep 09 11:10:44 2010 +0200
@@ -30,7 +30,7 @@
 
 lemma
   "exec c s s' ==> exec (Seq c c) s s'"
-quickcheck[generator = predicate_compile_wo_ff, size = 2, iterations = 1]
+quickcheck[generator = predicate_compile_wo_ff, size = 2, iterations = 10]
 oops
 
 

--- a/src/HOL/Predicate_Compile_Examples/IMP_3.thy	Thu Sep 09 09:11:13 2010 +0200
+++ b/src/HOL/Predicate_Compile_Examples/IMP_3.thy	Thu Sep 09 11:10:44 2010 +0200
@@ -30,7 +30,7 @@
 
 lemma
   "exec c s s' ==> exec (Seq c c) s s'"
-  quickcheck[generator = predicate_compile_ff_nofs, size=2, iterations=3, quiet = false, expect = counterexample]
+  quickcheck[generator = predicate_compile_ff_nofs, size=2, iterations=10, quiet = false, expect = counterexample]
 oops