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On Path Cover Problems in Digraphs and Applications to Program Testing

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2 Author(s)

In this paper various path cover problems, arising in program testing, are discussed. Dilworth's theorem for acyclic digraphs is generalized. Two methods for fmding a minimum set of paths (minimum path cover) that covers the vertices (or the edges) of a digraph are given. To model interactions among code segments, the notions of required pairs and required paths are introduced. It is shown that rmding a minimum path cover for a set of required pairs is NP-hard. An efficient algorithm is given for findng a minimum path cover for a set of required paths. Other constrained path problems are contsidered and their complexities are discussed.

Published in:

Software Engineering, IEEE Transactions on  (Volume:SE-5 ,  Issue: 5 )

Date of Publication:

Sept. 1979

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