-------------------- smoke0.bpl --------------------
found unreachable code:
implementation b(x: int)
{
  var y: int;
  var y@0: int;


  anon0:
    assume true;
    assume true;
    goto anon3_Then;

  anon3_Then:
    assume true;
    assume x < 0;
    y := 1;
    assume 1 <= y && y <= 1;
    assert false;
    return;
}



Boogie program verifier finished with 4 verified, 0 errors