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Characterizing Implementability of Global Protocols with Infinite States and Data

Talkat OOPSLA 2025 · 2025-10-16..10-18· [distributed-systems]
name:Elaine Li
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Provides a semantic characterization that reduces implementability of symbolic global protocols to (co)reachability checks per participant and a set of concrete coherence conditions that capture when locally indistinguishable states force impossible choices. Builds a symbolic decision procedure via a muCLP reduction (least and greatest fixpoints over a background theory), proves decidability and complexity bounds: finite explicit cases are co-NP-complete, boolean symbolic cases are PSPACE-complete. Implements the reduction and mechanizes the preciseness theorem in the rock prover.

AI-written summary · about

  1. 0:00Introduction
  2. 2:09Global protocols implementability
  3. 4:36Implementability with CLTS
  4. 5:39Information asymmetry
  5. 7:23Concrete runs indistinguishability
  6. 8:50Coherence conditions
  7. 10:35Synthesis and complexity
  8. 10:55Conclusion
  9. 11:22Q&A
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