Abstract: How to generate program assertions is of great importance to software verifications Classical approach to this problem relies on a good command of program structures and repeatedly applying Hoare’s rule for deducing Hoare triples.In order to get rid of this tedious work，we will dedicate in this paper to establish a semi-automatic approach to assertion generations.To facilitate understanding，the discussion is mainly based on XYZ/VERI system，a Hoare-like interactive verification system for temporal logic programming language like XYZ/SE.To some extent，this work helps with its functionality improvement.

Key words: Hoare’s logic, program verification, program assertion, XYZ/VERI

摘要： 如何生成程序断言对于软件验证十分重要。传统方法要求既要对程序结构有深入地把握又要做繁复的Hoare三元式推演工作。为了摆脱这些琐碎事宜，将致力于探讨一种半自动的断言生成方法。为便于理解，讨论主要以XYZ/VERI系统为论述背景。XYZ/VERI 系统是一面向时序逻辑程序语言如XYZ/SE 的类Hoare逻辑交互式验证系统。该工作一定意义上完善了其验证功能。

关键词: Hoare 逻辑, 序验证, 程序断言, XYZ/VERI