Technical Report CS713
||MODULAR ABSTRACTIONS FOR VERIFYING REAL-TIME DISTRIBUTED SYSTEMS.
||H. De-Leon and O. Grumberg
In this work we present a verification methodology for real-time
distributed systems, based on their modular decomposition into
processes. Given a distributed system, each of its components is
reduced by abstracting away from details that are irrelevant for
the required specification. The abstract components are then composed
to form an abstract system to which a model checking procedure is
applied. The abstraction relation and the specification language
guarantee that if the abstract system satisfies a specification
then the original system satisfies it as well.
The specification language RTL is a branching-time version of
the real-time temporal logic TPTL presented in [AH89]. Its
model checking is linear in the size of the system and exponential
in the size of the formula. Two notions of abstraction for real-time
systems are introduced, each preserving a sublanguage of RTL.
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