Multicore Constraint-Based Automated Stabilization

Fuad Abujarad and Sandeep S. Kulkarni


Given the non-determinism and race conditions in distributed programs, the ability to provide assurance about them is crucial. Our work focuses on incremental synthesis where we modify a distributed programs to add self-stabilization. We concentrate on reducing the time complexity of such synthesis using parallelism. We apply these techniques in the context of constraint satisfaction. In particular, incremental synthesis of self-stabilizing programs requires adding recovery actions to satisfy the constraint that are true in the legitimate states. We consider two approaches to speedup the synthesis algorithm: first, the use of the multiple constraints that have to be satisfied during synthesis; second, the use of the distributed nature of the programs being synthesized. We show that our approaches provide significant reductions in the synthesis time.


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