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key insightsaddressing the challenges of distributed systems, debugging necessitates collaboration between HPC and formal verification. along with HPC, distributed computing based on communication libraries is going mainstream in the commodity world, two communities that must look to learn and benefit from one another.Catastrophic disruption of programmer productivity can be avoided through formal verification tools that handle problems of scale, enhance coverage by avoiding redundant searches, and decrease false-alarm rates through more precise analysis.

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We present a method to verify the correctness of parallel programs that perform complex numerical computations, including computations involving floating-point arithmetic.The method requires that a sequential version of the program be provided, to serve as the specification for the parallel one. The key idea is to use model checking, together with symbolic computation, to establish the equivalence of the two programs.

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