The safe teleport and antimatter count is above the control panel antimatter button. If the count is greater than 0, safe teleport and antimatter work correctly. If the count is 0, safe teleport behaves exactly the same as random teleport and antimatter does nothing. The same count is used for both safe teleports and antimatter. Using either one reduces the count by 1. Destroying all of the robots and moving to the next level adds between 1 and 3 to the count.