This paper introduces the principle and methods of model checking and focuses on how to validate the correctness of a microprocessor PIC by VIS Equivalence of part design of PIC is proved, an important feature of PIC is verified and a bug is found.

• 文中介绍了符号模型检验的基本原理和方法 ；重点介绍如何用 VIS系统验证微处理器 PIC设计的正确性 .；利用 VIS证明了 PIC设计部分电路的等价性；发现了一个设计错误并证明了 PIC中一些重要模块的特性