var x: int;

var y: int;

var z: int;

procedure p();
  modifies x;



implementation p()
{

  A:
    assume {:inferred} true;
    x := 8;
    assume {:inferred} x == 8;
    goto B, C;

  C:
    assume {:inferred} x == 8;
    x := 10;
    assume {:inferred} x == 10;
    goto D;

  D:
    assume {:inferred} 9 <= x && x < 11;
    assume {:inferred} 9 <= x && x < 11;
    return;

  B:
    assume {:inferred} x == 8;
    x := 9;
    assume {:inferred} x == 9;
    goto D;
}



Boogie program verifier finished with 0 verified, 0 errors