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We equip labelled transition systems (LTSs) with unidirectional counters (UCs) which can be initialised to an arbitrary positive value and decremented but not incremented. This formalism, called UCLTSs, enables one to express fairness properties of concurrent systems in a finite form and reason about them in a compositional, refinement-based fashion. Technically, we first show how to apply CSP-style...
Decidability and complexity of the satisfiability problem for the logics of time intervals have been extensively studied in the last years. Even though most interval logics turnout to be undecidable, meaningful exceptions exist, such as the logics of temporal neighborhood and (some of) the logics of the subinterval relation. In this paper, we explore a different path to decidability: instead of restricting...
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