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Fei He

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Structural Abstraction and Refinement for Probabilistic ProgramsOOPSLA 20252025-10-16
Framework treats a Probabilistic Control‑Flow Automaton as an MDP whose actions drop semantics, so the structural upper bound is the MDP’s maximum reachability…
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On Temporal Verification of Stateful P4 ProgramsNSDI '252025-04-28
Introduces P4LTL, a packet-processing LTL for expressing safety (e.g., no implicit drops when a register count is in-range) and liveness (per-port activation…
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Automated Ambiguity Detection in Layout-Sensitive GrammarsOOPSLA 20232023-10-23
Extends bounded-ambiguity SAT methods to layout-sensitive grammars by replacing SAT with SMT+Z3 and adding a reachability condition to fix a discovered…
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Termination Analysis for Evolving Programs: An Incremental Approach by Reusing Certified ModulesOOPSLA 20202020-11-15
Presents an incremental termination checker that reuses certified modules extracted from prior runs, implemented on top of UAutomizer and tested on 276…
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Incremental Predicate Analysis for Regression VerificationOOPSLA 20202020-11-15
Implements an end-to-end regression-verification pipeline on CPAchecker that reuses assertion annotations across revisions: a CFA Diff based on similarity…
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