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Learning and using domain-specific heuristics in ASP solvers

机译:在ASP求解器中学习和使用特定于域的启发式方法

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摘要

In spite of the improvements in the performance of many solvers for model-based languages, it is still possible for the search algorithm to focus on the wrong areas of the search space, preventing the solver from returning a solution in an acceptable amount of time. This prospect is a real concern e.g. in an industrial setting, where users typically expect consistent performance. To overcome this problem, we propose a framework that allows learning and using domain-specific heuristics in the solvers. The learning is done offline, on representative instances from the target domain, and the learned heuristics are then used for choice-point selection. In this paper we focus on Answer Set Programming (ASP) solvers. In our experiments, the introduction of domain-specific heuristics improved performance quite substantially on hard instances, and in particular made overall performance more consistent by reducing the number of cases in which the solver timed out.
机译:尽管许多基于模型的语言的求解器的性能有所提高,但是搜索算法仍然有可能专注于搜索空间的错误区域,从而阻止求解器在可接受的时间内返回解决方案。这个前景是一个真正的问题,例如在工业环境中,用户通常希望获得一致的性能。为了克服这个问题,我们提出了一个框架,该框架允许在求解器中学习和使用特定领域的启发式方法。该学习是在目标域的代表性实例上离线完成的,然后将学习到的启发式方法用于选择点选择。在本文中,我们重点讨论答案集编程(ASP)求解器。在我们的实验中,特定域启发式算法的引入极大地提高了在硬实例上的性能,尤其是通过减少求解器超时的情况数量,使整体性能更加一致。

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