diff --git a/Makefile b/Makefile
index 5ed0d91..ec96651 100644
--- a/Makefile
+++ b/Makefile
@@ -17,11 +17,17 @@ advanced:
 	@echo "\n==== COMPILING ====\n"
 	ocamlbuild ftest_advanced.native
 
-demo: build
+demo_advanced: build
 	@echo "\n==== EXECUTING ====\n"
-	./ftest.native graphs/graph1 1 2 outfile
+	./ftest_advanced.native graphs/graph2 graphs/graph4
 	@echo "\n==== RESULT ==== (content of outfile) \n"
-	@cat outfile
+	@cat graphs/graph4
+
+demo_basic: build
+	@echo "\n==== EXECUTING ====\n"
+	./ftest_basic.native graphs/graph1 graphs/graph3 1 5
+	@echo "\n==== RESULT ==== (content of outfile) \n"
+	@cat graphs/graph3
 
 clean:
 	-rm -rf _build/
diff --git a/src/BLF.ml b/src/BLF.ml
index 5844a14..faa3feb 100644
--- a/src/BLF.ml
+++ b/src/BLF.ml
@@ -35,11 +35,17 @@ let blf gr id_src id_dest=
                 |(id,(lcout,lcapa))::d-> 
                     (*let () = printf "id=%d, cout=%d, capacite=%d\n" id lcout lcapa in*)
                     if lcapa <> 0 && (Int.add blf_tab.(a).cout lcout)<(blf_tab.(id).cout) then
-                    begin
+                        begin
                         blf_tab.(id).cout<-(Int.add blf_tab.(a).cout lcout);
                         blf_tab.(id).father<-a; 
                         if not (List.mem id file_marque) then loop_suc d blf_tab (id::file) else loop_suc d blf_tab file
-                    end
+                        end
+                    (*else if lcapa <> 0 && (Int.add blf_tab.(a).cout lcout)=(blf_tab.(id).cout) && ((Random.int 2)=0) then
+                        begin
+                        blf_tab.(id).cout<-(Int.add blf_tab.(a).cout lcout);
+                        blf_tab.(id).father<-a; 
+                        if not (List.mem id file_marque) then loop_suc d blf_tab (id::file) else loop_suc d blf_tab file
+                        end*)
                     else loop_suc d blf_tab file in
         loop_suc l_out_arc blf_tab b in
     blf_rec gr file_id file_marque 
diff --git a/src/ftest_advanced.ml b/src/ftest_advanced.ml
index 7fbd929..fb51677 100644
--- a/src/ftest_advanced.ml
+++ b/src/ftest_advanced.ml
@@ -10,8 +10,8 @@ open Bp
 let () =
  
   (*/!\ Format de la commande pour lancer le test : 
-        ./ftest.native [nom_fichier_lecture] [id_source] [id_dest] [nom_fichier_ecriture]
-   ex : ./ftest.native graphs/graph1 0 5 graphs/graph3 *)
+        ./ftest_advanced.native [nom_fichier_lecture] [nom_fichier_ecriture]
+   ex : ./ftest_advanced.native graphs/graph2 graphs/graph4 *)
 
   (* Check the number of command-line arguments *)
   if Array.length Sys.argv <> 3 then
diff --git a/src/ftest_basic.ml b/src/ftest_basic.ml
index 1f8c0ae..48f160b 100644
--- a/src/ftest_basic.ml
+++ b/src/ftest_basic.ml
@@ -10,8 +10,8 @@ open Bp
 let () =
  
   (*/!\ Format de la commande pour lancer le test : 
-        ./ftest.native [nom_fichier_lecture] [id_source] [id_dest] [nom_fichier_ecriture]
-   ex : ./ftest.native graphs/graph1 0 5 graphs/graph3 *)
+        ./ftest_basic.native [nom_fichier_lecture] [nom_fichier_ecriture] [id_source] [id_dest]
+   ex : ./ftest_basic.native graphs/graph1 graphs/graph3 0 5 *)
 
   (* Check the number of command-line arguments *)
   if Array.length Sys.argv <> 5 then
@@ -21,7 +21,7 @@ let () =
     end ;
 
 
-  (* Arguments are : infile(1) source-id(2) sink-id(3) outfile(4) *)
+  (* Arguments are : infile(1) outfile(2) source-id(3) sink-id(4)  *)
 
 
 
@@ -56,6 +56,6 @@ let () =
 
   
   (*Uncomment the following line if you have graphviz installed  *)
-  (*let retour = command ("dot -Tsvg "^outfile^".dot > "^outfile^".svg") in *)
+  let retour = command ("dot -Tsvg "^outfile^".dot > "^outfile^".svg") in
   ()