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