X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fcomponents%2Fng_paramodulation%2Fstats.ml;h=fd68f0fe765cd7cd75be5805dac8c516a0f623fb;hb=f9abd21eb0d26cf9b632af4df819225be4d091e3;hp=a281ddc867a12ee8a21ab8f1ae17f629cf345e87;hpb=18beb4339a683c5b6243673b91da878a208b36e3;p=helm.git

diff --git a/helm/software/components/ng_paramodulation/stats.ml b/helm/software/components/ng_paramodulation/stats.ml
index a281ddc86..fd68f0fe7 100644
--- a/helm/software/components/ng_paramodulation/stats.ml
+++ b/helm/software/components/ng_paramodulation/stats.ml
@@ -83,9 +83,15 @@ module Stats (B : Terms.Blob) =
 			(t,occ,ar,goal_occ_nbr t goal,goal_pos t goal)::acc) res []
     ;;
 
+    let rec leaf_count = function
+      | Terms.Node l -> List.fold_left (fun acc x -> acc + (leaf_count x)) 0 l
+      | Terms.Leaf _ -> 1
+      | _ -> 0
+    ;;
+
     let rec dependencies op clauses acc =
       match clauses with
-	| [] -> []
+	| [] -> acc
 	| (_,lit,_,_)::tl ->
 	    match lit with
 	      | Terms.Predicate _ -> assert false
@@ -109,10 +115,21 @@ module Stats (B : Terms.Blob) =
 			    else
 			      dependencies op tl acc
 			else dependencies op tl acc
-		    | _ -> acc
+                    | ((Terms.Node (Terms.Leaf op1::t) as x),y)
+                    | (y,(Terms.Node (Terms.Leaf op1::t) as x)) when leaf_count x > leaf_count y ->
+                         let rec term_leaves = function
+                           | Terms.Node l -> List.fold_left (fun acc x -> acc @ (term_leaves x)) [] l
+                           | Terms.Leaf x -> [x]
+                           | _ -> []
+                         in
+                         if List.mem op (List.filter (fun z -> not (B.eq op1 z)) (term_leaves x)) then 
+                           dependencies op tl (op1::acc)
+                         else
+                           dependencies op tl acc
+		    | _ -> dependencies op tl acc
     ;;
 
-    let dependencies op clauses = dependencies op clauses [];;
+    let dependencies op clauses = HExtlib.list_uniq (List.sort Pervasives.compare (dependencies op clauses []));;
 
     (* let max_weight_hyp = *)