Abstract
We present a new version of Peregrine, the tool for the analysis and parameterized verification of population protocols introduced in [Blondin et al., CAV'2018]. Population protocols are a model of computation, intensely studied by the distributed computing community, in which mobile anonymous agents interact stochastically to perform a task. Peregrine 2.0 features a novel verification engine based on the construction of stage graphs. Stage graphs are proof certificates, introduced in [Blondin et al., CAV'2020], that are typically succinct and can be independently checked. Moreover, unlike the techniques of Peregrine 1.0, the stage graph methodology can verify protocols whose executions never terminate, a class including recent fast majority protocols. Peregrine 2.0 also features a novel proof visualization component that allows the user to interactively explore the stage graph generated for a given protocol.
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