4. Derive good invariantsYou did the modeling for a purpose, not for sport. You want to arrive at reasoning insights about your protocol, and invariants are the distilled version of those insights. Invariant-based reasoning is non-operational: instead of tracing execution paths and happy-path thinking, you ask "what needs to go right?" You specify the boundary conditions, and the model checker explores all possible interleavings to verify them.
中科宇航透露，为达成大运力、低成本、高频次目标，力箭二号采用通用化、组合化、模块化设计方案，将火箭分解为可重复组装的独立功能模块。
，更多细节参见snipaste截图
俄罗斯民众收到新一波疫情预警 02:54
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