/**************************************************************************/
/*                                                                        */
/*  The Why platform for program certification                            */
/*                                                                        */
/*  Copyright (C) 2002-2014                                               */
/*                                                                        */
/*    Jean-Christophe FILLIATRE, CNRS & Univ. Paris-sud                   */
/*    Claude MARCHE, INRIA & Univ. Paris-sud                              */
/*    Yannick MOY, Univ. Paris-sud                                        */
/*    Romain BARDOU, Univ. Paris-sud                                      */
/*                                                                        */
/*  Secondary contributors:                                               */
/*                                                                        */
/*    Thierry HUBERT, Univ. Paris-sud  (former Caduceus front-end)        */
/*    Nicolas ROUSSET, Univ. Paris-sud (on Jessie & Krakatoa)             */
/*    Ali AYAD, CNRS & CEA Saclay      (floating-point support)           */
/*    Sylvie BOLDO, INRIA              (floating-point support)           */
/*    Jean-Francois COUCHOT, INRIA     (sort encodings, hyps pruning)     */
/*    Mehdi DOGGUY, Univ. Paris-sud    (Why GUI)                          */
/*                                                                        */
/*  This software is free software; you can redistribute it and/or        */
/*  modify it under the terms of the GNU Lesser General Public            */
/*  License version 2.1, with the special exception on linking            */
/*  described in file LICENSE.                                            */
/*                                                                        */
/*  This software is distributed in the hope that it will be useful,      */
/*  but WITHOUT ANY WARRANTY; without even the implied warranty of        */
/*  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.                  */
/*                                                                        */
/**************************************************************************/


/*@ ensures \result == 0
  @*/
int f1() {
  int x=0;
  goto l1;
  x=1;
 l1: return x;
}

int f2() {
  goto l1;
 l2: goto l3;
 l1: goto l2;
 l3: return 0;
}

int f3(int x) {
  if (x==0) { 
    goto l2; 
    l1 : x = 1;  
  } else {
    goto l1;
    l2 : x = 2;
  }
  return x;
}

  
int f4() {
  int x;
  //@ label L
  /*@ invariant x <= \at(x,L)
    @ variant x
    @*/
  while(x > 0) x--;
}

int f5() {
  int x;
 L:
  /* TODO @ invariant x <= \at(x,L)
    @ variant x
    @*/
  while(x > 0) x--;
}
