Computer Science > Formal Languages and Automata Theory
[Submitted on 18 Oct 2022 (v1), last revised 22 Nov 2022 (this version, v3)]
Title:On History-Deterministic One-Counter Nets
View PDFAbstract:We consider the model of history-deterministic one-counter nets (OCNs). History-determinism is a property of transition systems that allows for a limited kind of non-determinism which can be resolved 'on-the-fly'. Token games, which have been used to characterise history-determinism over various models, also characterise history-determinism over OCNs. By reducing 1-token games to simulation games, we are able to show that checking for history-determinism of OCNs is decidable. Moreover, we prove that this problem is PSPACE-complete for a unary encoding of transitions, and EXPSPACE-complete for a binary encoding.
We then study the language properties of history-deterministic OCNs. We show that the resolvers of non-determinism for history-deterministic OCNs are eventually periodic. As a consequence, for a given history-deterministic OCN, we construct a language equivalent deterministic one-counter automaton. We also show the decidability of comparing languages of history-deterministic OCNs, such as language inclusion and language universality.
Submission history
From: Aditya Prakash [view email][v1] Tue, 18 Oct 2022 18:27:03 UTC (1,019 KB)
[v2] Thu, 20 Oct 2022 00:16:35 UTC (1,018 KB)
[v3] Tue, 22 Nov 2022 17:14:30 UTC (922 KB)
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