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Logic in Computer Science, Symposium on (2006)
Seattle, Washington
Aug. 12, 2006 to Aug. 15, 2006
ISSN: 1043-6871
ISBN: 0-7695-2631-4
pp: 91-100
Dietrich Kuske , Universitat Leipzig, Germany
Markus Lohrey , Universitat Stuttgart, Germany
Logical properties of iterations of relational structures are studied and these decidability results are applied to the model checking of a powerful extension of pushdown systems. It is shown that the monadic chain theory of the iteration of a structure A (in the sense of Shelah and Stupp) is decidable in case the first-order theory of the structure A is decidable. This result fails if Muchnik?s clone-predicate is added. A model of pushdown automata, where the stack alphabet is given by an arbitrary (possibly infinite) relational structure, is introduced. If the stack structure has a decidable first-order theory with regular reachability predicates, then the same holds for the configuration graph of this pushdown automaton. This result follows from our decidability result for the monadic chain theory of the iteration.

M. Lohrey and D. Kuske, "Monadic Chain Logic Over Iterations and Applications to Pushdown Systems," 21st Annual IEEE Symposium on Logic in Computer Science(LICS), Seattle, WA, 2006, pp. 91-100.
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