Abstract
This paper brings together two methods to compositionally verify the generalized non-blocking property, which is a weak liveness property to express the ability of concurrent systems to terminate under given preconditions. Appropriate notions of equivalence and refinement for the generalized nonblocking property are discussed, and abstraction rules to simplify finite-state automata accordingly are presented. The paper also presents a unique canonical automaton representation for all generalized nonblocking equivalent automata, which gives rise to more general means of abstraction and to effective decision procedures for generalized nonblocking equivalence. Experimental results demonstrate how abstraction rules and canonical automata can be combined to model-check large models of concurrent software.
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