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We present a bottom-up algorithm for the computation of the well-founded model of non-disjunctive logic programs. Our method is based on the elementary program transformations studied by Brass and Dix [6, 7]. However, their “residual program” can grow to exponential size, whereas for function-free programs our “program remainder” is always polynomial in the size, i.e. the number of tuples, of the...
We present a bottom-up algorithm for the computation of the well-founded model of non-disjunctive logic programs which is based on the set of elementary program transformations studied by Brass and Dix [4, 5]. The transformation approach has been introduced in more detail in [7]. In this paper we present a deeper analysis of its complexity and describe an optimized SCC-oriented evaluation. We show...