X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fcomponents%2Fgrafite_engine%2FgrafiteEngine.ml;h=57491cbdaf4d4ddf46f936b415f1622d100f6d72;hb=31cb2f0b374657eb5acb95708443e2c1b8481891;hp=bd0fd6ceac3faa2b7afa82011b96396bb88a4983;hpb=974970b91996a4caae7af96b85acde33254cdfc9;p=helm.git

diff --git a/matita/components/grafite_engine/grafiteEngine.ml b/matita/components/grafite_engine/grafiteEngine.ml
index bd0fd6cea..57491cbda 100644
--- a/matita/components/grafite_engine/grafiteEngine.ml
+++ b/matita/components/grafite_engine/grafiteEngine.ml
@@ -634,7 +634,16 @@ let rec eval_ncommand ~include_paths opts status (text,prefix_len,cmd) =
                   (*HLog.warn "error in generating projection/eliminator";*)
                   status
              ) status boxml in             
-           let _,_,_,_,nobj = obj in 
+           let _,_,_,_,nobj = obj in
+           (* attempting to generate an inversion principle on the maximum
+            * universe can take a long time to fail: this code removes maximal
+            * sorts from the universe list *)
+           let universes = NCicEnvironment.get_universes () in
+           let max_univ = List.fold_left max [] universes in
+           let universes = 
+             List.filter (fun x -> NCicEnvironment.universe_lt x max_univ)
+               universes
+           in
            let status = match nobj with
                NCic.Inductive (is_ind,leftno,itl,_) ->
                  List.fold_left (fun status it ->      
@@ -654,12 +663,13 @@ let rec eval_ncommand ~include_paths opts status (text,prefix_len,cmd) =
                                     ("",0,GrafiteAst.NQed (Stdpp.dummy_loc,false))
                            | _ -> status))
                        (* XXX *)
-                      with _ -> (*HLog.warn "error in generating inversion principle"; *)
+                      with
+                         Sys.Break as exn -> raise exn
+                       | _ -> (*HLog.warn "error in generating inversion principle"; *)
                                 let status = status#set_ng_mode `CommandMode in status)
                   status
                   (NCic.Prop::
-                    List.map (fun s -> NCic.Type s)
-                    (NCicEnvironment.get_universes ())))) status itl
+                    List.map (fun s -> NCic.Type s) universes))) status itl
               | _ -> status
            in
            let status = match nobj with
@@ -707,7 +717,9 @@ let rec eval_ncommand ~include_paths opts status (text,prefix_len,cmd) =
                                     ("",0,GrafiteAst.NQed(Stdpp.dummy_loc,false))
                            | _ -> status))
                        (* XXX *)
-                      with _ -> (*HLog.warn "error in generating discrimination principle"; *)
+                      with
+                         Sys.Break as exn -> raise exn
+                       | _ -> (*HLog.warn "error in generating discrimination principle"; *)
                                 let status = status#set_ng_mode `CommandMode in
                                 status)
                   status' itl