For Random, the decay of the fraction of nodes possessing a minimum path length of greater than 4 is very slow, with delayed initial growth of the fractions of nodes with minimum path lengths of 1, 2, 3, and 4. Consequently, Random's search performance is the worst, as shown in Figure (c). Notably, the minimum path length from the start node to the goal node in the Strecker reaction dataset is 8, which is longer than the path between the counterpart nodes in the Passerini reaction dataset and contributes to the difficulty in the Random search.