约束Horn子句的规范综合

Sumanth Prabhu, Grigory Fedyukovich, Kumar Madhukar, D. D'Souza
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引用次数: 6

摘要

未定义过程的综合规范问题具有广泛的应用范围,但生成的规范的有用性取决于它们的质量。在本文中,我们提出了一种寻找最大和非空洞规范的技术。最大值为未定义过程的实现提供了更多选择,非空性确保了安全断言的可达性。为了处理具有复杂控制流的程序,我们的技术不仅发现规范,而且发现归纳不变量。我们的迭代算法在反例引导的循环中惰性地泛化非空洞规范。该技术的关键部分是一种有效的非真空规格综合算法。我们已经在一个叫做HornSpec的工具中实现了这种方法,将约束的Horn子句作为输入系统。我们已经通过实验证明了该工具的有效性、效率,以及在一系列基准测试中生成规范的质量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Specification synthesis with constrained Horn clauses
The problem of synthesizing specifications of undefined procedures has a broad range of applications, but the usefulness of the generated specifications depends on their quality. In this paper, we propose a technique for finding maximal and non-vacuous specifications. Maximality allows for more choices for implementations of undefined procedures, and non-vacuity ensures that safety assertions are reachable. To handle programs with complex control flow, our technique discovers not only specifications but also inductive invariants. Our iterative algorithm lazily generalizes non-vacuous specifications in a counterexample-guided loop. The key component of our technique is an effective non-vacuous specification synthesis algorithm. We have implemented the approach in a tool called HornSpec, taking as input systems of constrained Horn clauses. We have experimentally demonstrated the tool's effectiveness, efficiency, and the quality of generated specifications on a range of benchmarks.
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