We observe that, as shown in Figure 4a, if the divergence point is caused by concurrency in the same task, a common pattern is that keys with the highest probabilities in the prediction output will appear one after another, and the certainty (measured by higher probabilities for less number of keys) for the following predictions will increase, as keys for some of the concurrent threads have already appeared. The prediction will eventually become certain after all keys from concurrent threads are included in the history sequence.