include "Clight/Cexec.ma".
include "common/Animation.ma".

definition myprog := mk_program (\lambda _. clight_fundef) ((list init_data) × type)
  [][〈ident_of_nat 0 (* main *), CL_Internal (
       mk_function (Tint I32 Signed  ) [] [〈ident_of_nat 1, (Tint I32 Unsigned)〉 ; 〈ident_of_nat 2, (Tint I8 Unsigned )〉 ]
         (Ssequence
         (Sassign (Expr (Evar (ident_of_nat 1)) (Tint I32 Unsigned))
           (Expr (Ecast (Tint I32 Unsigned)
             (Expr (Econst_int I32 (repr ? 16)) (Tint I32 Signed  )))
             (Tint I32 Unsigned)))
         (Ssequence
         (Sassign (Expr (Evar (ident_of_nat 2)) (Tint I8 Unsigned ))
           (Expr (Ecast (Tint I8 Unsigned )
             (Expr (Econst_int I32 (repr ? 0)) (Tint I32 Signed  )))
             (Tint I8 Unsigned )))
         (Ssequence
         (Swhile (Expr (Ebinop Odiv
                   (Expr (Evar (ident_of_nat 1)) (Tint I32 Unsigned))
                   (Expr (Ecast (Tint I32 Unsigned)
                     (Expr (Econst_int I32 (repr ? 2)) (Tint I32 Signed  )))
                     (Tint I32 Unsigned))) (Tint I32 Unsigned))
           (Ssequence
           (Sassign (Expr (Evar (ident_of_nat 1)) (Tint I32 Unsigned))
             (Expr (Ebinop Osub
               (Expr (Evar (ident_of_nat 1)) (Tint I32 Unsigned))
               (Expr (Ecast (Tint I32 Unsigned)
                 (Expr (Econst_int I32 (repr ? 1)) (Tint I32 Signed  )))
                 (Tint I32 Unsigned))) (Tint I32 Unsigned)))
           (Sassign (Expr (Evar (ident_of_nat 2)) (Tint I8 Unsigned ))
             (Expr (Ecast (Tint I8 Unsigned )
               (Expr (Ebinop Oadd
                 (Expr (Ecast (Tint I32 Signed  )
                   (Expr (Evar (ident_of_nat 2)) (Tint I8 Unsigned )))
                   (Tint I32 Signed  ))
                 (Expr (Econst_int I32 (repr ? 1)) (Tint I32 Signed  )))
                 (Tint I32 Signed  ))) (Tint I8 Unsigned )))))
         (Sreturn (Some expr (Expr (Ecast (Tint I32 Signed  )
                               (Expr (Evar (ident_of_nat 2))
                                 (Tint I8 Unsigned ))) (Tint I32 Signed  )))))))
       
       
       
     )〉]
  (ident_of_nat 0)
  
.

(*
example exec: result ? (exec_up_to clight_fullexec myprog 1000 [EVint I32 (repr I32 0)]).
normalize  (* you can examine the result here *)
*)