/**************************************************************************/
/*                                                                        */
/*  The Why platform for program certification                            */
/*                                                                        */
/*  Copyright (C) 2002-2011                                               */
/*                                                                        */
/*    Jean-Christophe FILLIATRE, CNRS & Univ. Paris-sud 11                */
/*    Claude MARCHE, INRIA & Univ. Paris-sud 11                           */
/*    Yannick MOY, Univ. Paris-sud 11                                     */
/*    Romain BARDOU, Univ. Paris-sud 11                                   */
/*                                                                        */
/*  Secondary contributors:                                               */
/*                                                                        */
/*    Thierry HUBERT, Univ. Paris-sud 11  (former Caduceus front-end)     */
/*    Nicolas ROUSSET, Univ. Paris-sud 11 (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 11    (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.                  */
/*                                                                        */
/**************************************************************************/


//@+ CheckArithOverflow = no
//@+ InvariantPolicy = Arguments
//@+ NonNullByDefault = yes

class C { int x; }

class NonNullByDefault {
    
    int[] t;
    C c;
    static C sc;

    int[] m1() {
	return t;
    }
    
    int[] /*@ nullable @*/ m1bis() {
	return null;
    }
    
    C m2() {
	return c;
    }
    
    C /*@ nullable @*/ m2bis() {
	return null;
    }
    
    C m2ter() {
	return new C();
    }

    void m3(int[] pt, C pc) {
	int n = pt.length;
	this.t = pt;
	int m = pc.x;
	this.c = c;
    }
    
    void m4() {
	int n = sc.x;
    }

}