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Lecture Notes in Computer Science
We present a new decidable logic called TREX for expressing constraints about imperative tree data structures. In particular, TREX supports a transitive closure operator that can express reachability constraints, which often appear in data structure invariants. We show that our logic is closed under weakest precondition computation, which enables its use for automated software verification. We further show that satisfiability of formulas in TREX is decidable in NP. The low complexity makes itdoi:10.1007/978-3-642-22438-6_36 fatcat:55pxk2vqqrfg7omdklsn3zgxti