predicate simulated_annealing(float: init_temp, float: cooling_rate) =
  let {
    var float: temp;
  } in if status() = START then
    temp = init_temp
  else
    temp = last_val(temp) * (1 - cooling_rate) % cool down
    /\ _objective < sol(_objective) - ceil(log(uniform(0.0, 1.0)) * temp)
  endif;