Timed Automata (TA) and Time Petri Nets (TPN) are two well-established formal models for real-time systems. Recently, a linear transformation of TA to TPNs preserving reachability properties and timed languages has been proposed, which does however not extend to larger classes of TA which would allow diagonal constraints or more general resets of clocks. Though these features do not add expressiveness, they yield exponentially more concise models.

In this work, we propose two translations: one from extended TA to TPNs whose size is either linear or quadratic in the size of the original TA, depending on the features which are allowed; another one from a parallel composition of TA to TPNs, which is also linear. As a consequence, we get that TPNs are exponentially more concise than TA. Keywords: Time Petri Nets, Timed Automata, Conciseness, Reachability Analysis.