  This document presents the tool named ''Application of Hoare Logic and
Dijkstra's Weakest Proposition Calculus to Biological Regulatory Networks Using
Path Programs with Branching First-Order Logic Operators'' or Hoare-fol for
short. This tool consists in an implementation of the theoretical work
developed in [Bernot et al., 2019] and contains the following features: (1)
computation of the weakest precondition of a Hoare triple, (2) simplification
of this weakest precondition using De Morgan laws and partial knowledge on the
initial state, and (3) translation into Answer Set Programming to allow a
solving of all compatible solutions.

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