Rapid circulating expansion detection method

Abstract

The invention discloses a rapid circulating expansion detection method and belongs to the technical field of software model detection. The method comprises the following steps of: 1) limiting a value range of each variable in a testing space and initializing the state in the testing space into all states meeting preconditions of a tested program in the limited range of the tested program; 2) randomly selecting an undetected state s and calling the tested program, and recording an executing path p of the tested program, by which the state s passes, and dynamic executing information; 3) sequentially calculating and detecting a circulating expansion similar path p' of the executing path p according to the dynamic executing information and checking whether all the states represented by a path restricting condition of the path p' are right or not, if so, cutting off the states passing through the detection from the testing space, and if not, printing a wrong state and giving out a counter example; and 4) carrying out iteration detection on all the states in the testing space. The method disclosed by the invention reduces the quantity of executed testing examples and increases the detection speed.

Description

technical field [0001] The invention relates to a software model detection technology and a state space reduction technology, and proposes a new detection method for cyclic expansion aiming at the verification space explosion problem of a data-based program containing a cycle about an aggregation type. Background technique [0002] Model checking is a technique for verifying that the finite state space of a system satisfies the correct properties. The traditional model checking technology starts from the initial state of the system under test, generates and verifies whether all subsequent states of the initial state satisfy a given correctness or security property. At present, many software model detection techniques and state reduction techniques for state explosion problems have been proposed (references: Chaki, S., E.Clarke, et al. (2003). Modular verification of software components in C.Software Engineering, 2003 .Proceedings.25th International Conference on.; Literatur...

AI Technical Summary

Problems solved by technology

However, we observed that many data structure methods contain loops about aggregation types, and these loops are a major cause of increased test cases and detection time

The existing model checking methods cannot effectively detect such programs, which makes it particularly important to propose an effective model checking method for programs containing aggregated loop structures

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