Shoji Yuen (Nagoya) A Zone based analysis of EDTPDA EDTPDA is the Dense timed pushdown automata with a extended form of push and pop operation exchanging local ages and clocks. A zone-based reachability analysis is proposed by Ausmees and we extend the technique for the extended push and pop operations as well as the clock freezing mechanism, which we expect the practical applications of the real-time program analysis.