What is the ruling when a man states to each wife that if he divorces one of her co-wives, she too is divorced?

Primary text

If a man states to each wife: Whenever I divorce one of your two co-wives, you are divorced. If he divorces the first wife, she is divorced three times, the second wife twice, and the third wife once. This is because the divorce of the first wife is the condition for the divorce of her two co-wives. The resulting divorces upon the co-wives constitute initiating divorces for the first wife, as they result from a condition he established after conditioning her divorce upon their divorces. Thus, she receives one divorce from each co-wife's resulting divorce, completing three. The second wife receives a second divorce from the third wife's resulting divorce for the same reason, but the third wife receives nothing from their conditionally occurring divorces, as those are not initiating divorces in her regard.