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diff --git a/contrib/correctness/penv.mli b/contrib/correctness/penv.mli
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-(************************************************************************)
-(*  v      *   The Coq Proof Assistant  /  The Coq Development Team     *)
-(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
-(*   \VV/  **************************************************************)
-(*    //   *      This file is distributed under the terms of the       *)
-(*         *       GNU Lesser General Public License Version 2.1        *)
-(************************************************************************)
-
-(* Certification of Imperative Programs / Jean-Christophe Filliātre *)
-
-(* $Id: penv.mli 5920 2004-07-16 20:01:26Z herbelin $ *)
-
-open Ptype
-open Past
-open Names
-open Libnames
-open Term
-
-(* Environment for imperative programs.
- * 
- * Here we manage the global environment, which is imperative,
- * and we provide a functional local environment. 
- *
- * The most important functions, is_in_env, type_in_env and fold_all
- * first look in the local environment then in the global one.
- *)
-
-(* local environments *)
-
-type local_env
-
-val empty : local_env
-val add : (identifier * type_v) -> local_env -> local_env
-val add_set : identifier -> local_env -> local_env
-val is_local : local_env -> identifier -> bool
-val is_local_set : local_env -> identifier -> bool
-
-(* typed programs *)
-
-type typing_info = {
-  env : local_env;
-  kappa : constr ml_type_c
-}
-  
-type typed_program = (typing_info, constr) t
-
-(* global environment *)
-
-val add_global : identifier -> type_v -> typed_program option -> object_name
-val add_global_set : identifier -> object_name
-val is_global : identifier -> bool
-val is_global_set : identifier -> bool
-val lookup_global : identifier -> type_v
-
-val all_vars : unit -> identifier list
-val all_refs : unit -> identifier list
-
-(* a table keeps the program (for extraction) *)
-
-val find_pgm : identifier -> typed_program option
-
-(* a table keeps the initializations of mutable objects *)
-
-val initialize : identifier -> constr -> unit
-val find_init : identifier -> constr
-
-(* access in env (local then global) *)
-
-val type_in_env : local_env -> identifier -> type_v
-val is_in_env : local_env -> identifier -> bool
-
-type type_info = Set | TypeV of type_v
-val fold_all : (identifier * type_info -> 'a -> 'a) -> local_env -> 'a -> 'a
-
-(* local environnements also contains a list of recursive functions
- * with the associated variant *)
-
-val add_recursion : identifier * (identifier*variant) -> local_env -> local_env
-val find_recursion : identifier -> local_env -> identifier * variant
-
-(* We also maintain a table of the currently edited proofs of programs
- * in order to add them in the environnement when the user does Save *)
-
-val new_edited : identifier -> type_v * typed_program -> unit
-val is_edited : identifier -> bool
-val register : identifier -> identifier -> unit
-