Titlebook: Reachability Problems; 8th International Wo Joël Ouaknine,Igor Potapov,James Worrell Conference proceedings 2014 Springer International Pub

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Complexity Bounds for Ordinal-Based Termination,t of program termination proofs, with an eye to deriving complexity bounds on program running times..Our main tool for this are ., which provide complexity bounds on the use of well quasi orders. We illustrate how to prove such theorems in the simple yet until now untreated case of ordinals. We show

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Reachability and Mortality Problems for Restricted Hierarchical Piecewise Constant Derivatives,d a bounded 3-dimensional Restricted Hierarchical PCD (3-RHPCD). Both problems are shown to be in PSPACE, even for .-dimensional RHPCD. This is a restricted model with similarities to other models in the literature such as stopwatch automata, rectangular automata and PCDs. We also show that for an u

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Regular Strategies in Pushdown Reachability Games,e. Such automata read the stack and control state of a given pushdown configuration and output the set of winning moves playable from that position..This result can originally be attributed to Kupferman, Piterman and Vardi using an approach based on two-way tree automata. We present a more direct ap

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Equivalence Between Model-Checking Flat Counter Systems and Presburger Arithmetic,lity problem for Presburger arithmetic. The lower bound already holds with the temporal operator EF only, no arithmetical constraints in the logical language and with guards on transitions made of simple linear constraints. This complements our understanding of model-checking flat counter systems wi

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Synthesising Succinct Strategies in Safety and Reachability Games,etting of games, and rely on the notion of ., which is used to formalise natural relations that exist between the states of those games in many applications. In particular, our techniques apply to the realisability problem of LTL [8], to the synthesis of real-time schedulers for multiprocessor platf

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