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Data Communicating Processes with Unreliable Channels

机译:具有不可靠通道的数据通信过程

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We extend the classical model of lossy channel systems by considering systems that operate on a finite set of variables ranging over an infinite data domain. Furthermore, each message inside a channel is equipped with a data item representing its value. Although we restrict the model by allowing the variables to be only tested for (dis-)equality, we show that the state reachability problem is undecidable. In light of this negative result, we consider bounded-phase reachability, where the processes are restricted to performing either send or receive operations during each phase. We show decidability of state reachability in this case by computing a symbolic encoding of the set of system configurations that are reachable from a given configuration.
机译:通过考虑在无限数据域范围内的一组有限变量上运行的系统,我们扩展了有损通道系统的经典模型。此外,通道内的每个消息都配有代表其值的数据项。尽管我们通过仅对变量(不等式)进行测试来限制模型,但我们表明状态可达性问题是无法确定的。鉴于这种负面结果,我们考虑了有界阶段可到达性,其中进程被限制为在每个阶段都执行发送或接收操作。通过计算从给定配置可以到达的系统配置集的符号编码,我们展示了这种情况下状态可达性的可判定性。

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