VerifyThis is a series of program verification competitions that emphasize the human aspect: participants tackle the verification of detailed behavioral properties---something that lies beyond the capabilities of fully automatic verification, and requires instead human expertise to suitably encode programs, specifications, and invariants. This paper describes the 8th edition of VerifyThis, which took place at ETAPS 2019 in Prague. Thirteen teams entered the competition, which consisted of three verification challenges and spanned two days of work. The report analyzes how the participating teams fared on these challenges, reflects on what makes a verification challenge more or less suitable for the typical VerifyThis participants, and outlines the difficulties of comparing the work of teams using wildly different verification approaches in a competition focused on the human aspect.

中文翻译：

---

VerifyThis 2019：程序验证竞赛（扩展报告）

验证这是一系列强调人性化的程序验证竞赛：参赛者应对详细行为属性的验证——这超出了全自动验证的能力，而是需要人类专业知识来适当地编码程序、规范和不变量. 本文介绍了在布拉格 ETAPS 2019 上举行的第 8 版 VerifyThis。13 支队伍参加了比赛，比赛包括三个验证挑战，为期两天。该报告分析了参与团队如何应对这些挑战，反思验证挑战或多或少适合典型的 VerifyThis 参与者的原因，