diff --git a/ocaml/Resolution.ml b/ocaml/Resolution.ml
index 0ff9e9e..dd679da 100644
--- a/ocaml/Resolution.ml
+++ b/ocaml/Resolution.ml
@@ -204,15 +204,16 @@ let divide_token (fam, n_star) toklist graph const prob fstar checked_stars =
     in if links = [] then Some (toklist,prob,fstar,n_star::checked_stars,fam) 
     else aux links toklist prob fstar checked_stars
 
-(* should be deterministic exec, graph shouldn't be empty *)
-let exec const =
+(* should be deterministic exec, graph shouldn't be empty, takes a constellation and a list of stars that are gonna be beginning points *)
+let exec const start_star_list =
   let const_ext = extends_varname_const const in
   let graph = List.flatten (clean_dgraph (dgraph const_ext)) in
+  let max_fam = List.length start_star_list in
   let rec aux (toklist,prob,star,checked_stars,current_fam) =
     begin match toklist with
-      | [] -> let gen_token = List.filter (fun ((i,_),(_,_)) -> not( List.mem i checked_stars)) graph in 
-          if gen_token = [] then star,prob
-          else let ((i,_),(_,_)) = (List.hd gen_token) in aux ([(current_fam+1,i)],prob,star,checked_stars,current_fam+1)
+      | [] -> (*let gen_token = List.filter (fun ((i,_),(_,_)) -> not( List.mem i checked_stars)) graph in *) 
+          if current_fam = max_fam then star,prob
+          else aux ([(current_fam+1, List.nth start_star_list (current_fam+1))], prob, star, checked_stars, current_fam+1)
       | h::t -> aux (Option.get (divide_token h t graph const_ext prob star checked_stars))
     end              
   in let ((i,_),(_,_)) = (List.hd graph)