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Piotr Hofman

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Preprint Oct 2026

Integer reachability in VASS with transfers: a refined complexity analysis

Integer reachability is NP-complete for vector addition systems with states (VASS), but becomes PSPACE-complete in the presence of transfer operations. We refine this complexity gap for single-transfer VASS by identifying structural features of transfers responsible for the increase in complexity. Each system induces a...

Tymoteusz Kucharek, Piotr Hofman · 0 citations

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