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18th European Symposium on Programming, ESOP 2009, Held as Part of the Joint European Conferences on Theory and Practice of Software, ETAPS 2009, York, UK, March 22-29, 2009. Proceedings
We develop a general method of proving contextual properties—including (but not limited to) observational equivalence, space improvement, and memory safety under arbitrary contexts—for programs in untyped call-by-value λ-calculus with first-class, higher-order references (ref, : = and !) and deallocation (free). The method significantly generalizes Sumii et al.’s environmental bisimulation technique,...
Concurrent data structures are usually designed to satisfy correctness conditions such as sequential consistency and linearizability. In this paper, we consider the following fundamental question: what guarantees are provided by these conditions for client programs? We formally show that these conditions can be characterized in terms of observational refinement. Our study also provides a new understanding...
The operational semantics of interactive systems is usually described by labeled transition systems. Abstract semantics is defined in terms of bisimilarity that, in the finite case, can be computed via the well-known partition refinement algorithm. However, the behaviour of interactive systems is in many cases infinite and thus checking bisimilarity in this way is unfeasible. Symbolic semantics allows...
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