X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Ftactics%2Finversion_principle.ml;h=0f50116cb5ed7be0ce46d09178e8317a8dc1f8fe;hb=0b76904a3f10bfd6390d26172fd6979626bd72f4;hp=45ece4823a95caf0d54d9cf578841830f1962c40;hpb=c6cc2a7227d6750076f591a62d7b1896ebf1ebfa;p=helm.git

diff --git a/helm/software/components/tactics/inversion_principle.ml b/helm/software/components/tactics/inversion_principle.ml
index 45ece4823..0f50116cb 100644
--- a/helm/software/components/tactics/inversion_principle.ml
+++ b/helm/software/components/tactics/inversion_principle.ml
@@ -145,7 +145,7 @@ let build_inversion uri obj =
 	   debug_print 
 	     (lazy ("theorem prima di refine: " ^ (CicPp.ppterm theorem)));
 	   let (ref_theorem,_,metasenv,_) = CicRefine.type_of_aux' [] [] theorem  
-	     CicUniv.empty_ugraph in
+	     CicUniv.oblivion_ugraph in
 	     (*DEBUG*) debug_print 
 	     (lazy ("theorem dopo refine: " ^ (CicPp.ppterm ref_theorem)));
 	     let buri = UriManager.buri_of_uri uri in
@@ -156,7 +156,8 @@ let build_inversion uri obj =
 	     let attrs = [`Class (`InversionPrinciple); `Generated] in
        let _subst = [] in
 	     let proof= 
-	       (Some inversor_uri,metasenv',_subst,Cic.Meta(goal,[]),ref_theorem, attrs) in 
+	       (Some inversor_uri,metasenv',_subst,
+                 lazy (Cic.Meta(goal,[])),ref_theorem, attrs) in 
 	     let _,applies =
 	       List.fold_right
 		 (fun _ (i,applies) ->
@@ -193,9 +194,24 @@ let build_inversion uri obj =
 	       Some
 		 (inversor_uri,
 		  Cic.Constant 
-		    (UriManager.name_of_uri inversor_uri,Some bo,ty,[],[]))
+		    (UriManager.name_of_uri inversor_uri,Some (Lazy.force bo),ty,[],[]))
        with
-	   Inversion.EqualityNotDefinedYet -> None
+	  Inversion.EqualityNotDefinedYet -> None
+        | CicRefine.RefineFailure ls ->
+           HLog.warn
+            ("CicRefine.RefineFailure during generation of inversion principle: " ^
+             Lazy.force ls) ;
+           None
+        | CicRefine.Uncertain ls ->
+           HLog.warn
+            ("CicRefine.Uncertain during generation of inversion principle: " ^
+             Lazy.force ls) ;
+           None
+        | CicRefine.AssertFailure ls ->
+           HLog.warn
+            ("CicRefine.AssertFailure during generation of inversion principle: " ^
+             Lazy.force ls) ;
+           None
  in
    match obj with
      | Cic.InductiveDefinition (tys,_,nleft,_) ->