We employed a locally developed variant of the AIMS algorithm that uses the continuous spawning procedure, where each trajectory basis function (TBF) always has minimal overlap with at least one TBF in the other electronic state, specially designed for this weakly coupled SBH model. To limit the uncontrolled growth of the continuous spawning AIMS, we introduce the cannibalistic stochastic selection approach of AIMS (CSS-AIMS), where we stochastically select a single TBF in each state, based on its population whenever the total number of TBFs reaches a certain threshold (50 in the following). These measures were necessary to simulate the dynamics of this weak-coupling SBH model for a long timescale.