It is established that durational and structural aspects of actions can in general not be modeled in interleaving semantics, even when a time-consuming action is represented by a pair of instantaneous events denoting its start and finish. By means of a series of counterexamples it is shown that, for any $n$, it makes a difference whether actions are split in $n$ or in $n+1$ parts.

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Department of Computer Science [CS]

van Glabbeek, R.J, & Vaandrager, F.W. (1995). The difference between splitting in n and n + 1. Department of Computer Science [CS]. CWI.