diff -r aecb239a2bbc -r cd20519eb9d0 src/Tools/auto_counterexample.ML
--- a/src/Tools/auto_counterexample.ML	Tue Sep 14 08:40:22 2010 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,59 +0,0 @@
-(*  Title:      Tools/auto_counterexample.ML
-    Author:     Jasmin Blanchette, TU Muenchen
-
-Counterexample Search Unit (do not abbreviate!).
-*)
-
-signature AUTO_COUNTEREXAMPLE =
-sig
-  val time_limit: int Unsynchronized.ref
-
-  val register_tool :
-    string * (Proof.state -> bool * Proof.state) -> theory -> theory
-end;
-
-structure Auto_Counterexample : AUTO_COUNTEREXAMPLE =
-struct
-
-(* preferences *)
-
-val time_limit = Unsynchronized.ref 2500
-
-val _ =
-  ProofGeneralPgip.add_preference Preferences.category_tracing
-    (Preferences.nat_pref time_limit
-      "auto-counterexample-time-limit"
-      "Time limit for automatic counterexample search (in milliseconds).")
-
-
-(* configuration *)
-
-structure Data = Theory_Data
-(
-  type T = (string * (Proof.state -> bool * Proof.state)) list
-  val empty = []
-  val extend = I
-  fun merge data : T = AList.merge (op =) (K true) data
-)
-
-val register_tool = Data.map o AList.update (op =)
-
-
-(* automatic testing *)
-
-val _ = Context.>> (Specification.add_theorem_hook (fn interact => fn state =>
-  case !time_limit of
-    0 => state
-  | ms =>
-    TimeLimit.timeLimit (Time.fromMilliseconds ms)
-        (fn () =>
-            if interact andalso not (!Toplevel.quiet) then
-              fold_rev (fn (_, tool) => fn (true, state) => (true, state)
-                                         | (false, state) => tool state)
-                   (Data.get (Proof.theory_of state)) (false, state) |> snd
-            else
-              state) ()
-    handle TimeLimit.TimeOut =>
-           (warning "Automatic counterexample search timed out."; state)))
-
-end;