X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Facic_procedural%2FproceduralClassify.ml;h=4f9f99fcee76117056a100bd8f1a13dfb9fcfd24;hb=b54b2b352753b1c784d06118fc689c1ee9f9feaf;hp=6c1e482c2ff4d86aee5ee01cb988e50ece825630;hpb=ac1f50b898154dc3d74aa8fa2fff212a7d3a235c;p=helm.git

diff --git a/helm/software/components/acic_procedural/proceduralClassify.ml b/helm/software/components/acic_procedural/proceduralClassify.ml
index 6c1e482c2..4f9f99fce 100644
--- a/helm/software/components/acic_procedural/proceduralClassify.ml
+++ b/helm/software/components/acic_procedural/proceduralClassify.ml
@@ -28,6 +28,8 @@ module D   = Deannotate
 module I   = CicInspect
 module PEH = ProofEngineHelpers
 
+module H   = ProceduralHelpers
+
 type dependence = I.S.t * bool
 
 type conclusion = (int * int) option
@@ -52,12 +54,8 @@ let out_table b =
    in
    Array.iteri map b;
    prerr_newline ()
-   
-(****************************************************************************)
-
-let identity x = x
 
-let fst3 (x, _, _) = x
+(* classification ***********************************************************)
 
 let classify_conclusion vs = 
    let rec get_argsno = function
@@ -83,12 +81,13 @@ try
    let rc = classify_conclusion vs in
    let map (b, h) (c, v) = 
       let _, argsno = PEH.split_with_whd (c, v) in
-      (I.get_rels_from_premise h v, I.S.empty, argsno > 0) :: b, succ h
+      let iu = H.is_unsafe h (List.hd vs) in
+      (I.get_rels_from_premise h v, I.S.empty, argsno > 0 && iu) :: b, succ h
    in
    let l, h = List.fold_left map ([], 0) vs in
    let b = Array.of_list (List.rev l) in
    let mk_closure b h =
-      let map j = if j < h then I.S.union (fst3 b.(j)) else identity in 
+      let map j = if j < h then I.S.union (H.fst3 b.(j)) else H.identity in 
       for i = pred h downto 0 do
          let direct, unused, fa = b.(i) in
 	 b.(i) <- I.S.fold map direct direct, unused, fa