From: acondolu <andrea.condoluci@unibo.it>
Date: Wed, 30 May 2018 13:29:30 +0000 (+0200)
Subject: Added check with purification to andrea.ml
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=c5231b43a7f3f6c4b8f4d449cbae210a528c3e86;p=fireball-separation.git

Added check with purification to andrea.ml

Note! It now diverges because it uses B (bottoms)
---

diff --git a/ocaml/andrea.ml b/ocaml/andrea.ml
index 8535988..7493905 100644
--- a/ocaml/andrea.ml
+++ b/ocaml/andrea.ml
@@ -4,6 +4,8 @@ let rec fold_nat f x n = if n = 0 then x else f (fold_nat f x (n-1)) n ;;
 
 let print_hline = Console.print_hline;;
 
+open Pure
+
 type var = int;;
 type t =
  | V of var
@@ -145,6 +147,24 @@ let get_subterm_with_head_and_args hd_var n_args =
  in aux 0
 ;;
 
+let rec purify = function
+ | L t -> Pure.L (purify t)
+ | A (t1,t2) -> Pure.A (purify t1, purify t2)
+ | V n -> Pure.V n
+ | B -> Pure.B
+;;
+
+let check p sigma =
+ let div = purify p.div in
+ let conv = purify p.conv in
+ let sigma = List.map (fun (v,t) -> v, purify t) sigma in
+ let freshno = List.fold_right (fun (x,_) -> max x) sigma 0 in
+ let env = Pure.env_of_sigma freshno sigma in
+ assert (Pure.diverged (Pure.mwhd (env,div,[])));
+ assert (not (Pure.diverged (Pure.mwhd (env,conv,[]))));
+ ()
+;;
+
 let sanity p =
  print_endline (string_of_problem p); (* non cancellare *)
  if p.conv = B then problem_fail p "p.conv diverged";
@@ -252,7 +272,7 @@ let rec auto p =
  let hd_var, n_args = get_inert p.div in
  match get_subterm_with_head_and_args hd_var n_args p.conv with
  | None ->
-    (try problem_fail (eat p) "Auto did not complete the problem"  with Done _ -> ())
+    (try problem_fail (eat p) "Auto did not complete the problem"  with Done sigma -> sigma)
  | Some t ->
   let j = find_eta_difference p t n_args - 1 in
   let k = 1 + max
@@ -291,7 +311,11 @@ let rec conv_join = function
  | x::xs -> conv_join xs ^ " ("^ x ^")"
 ;;
 
-let auto' a b = auto (problem_of a (conv_join b));;
+let auto' a b =
+ let p = problem_of a (conv_join b) in
+ let sigma = auto p in
+ check p sigma
+;;
 
 (* Example usage of exec, interactive: