A toolkit for supporting formal verification of programs in the functional data-flow parallel programming language

Abstract

The article is devoted to the architecture development of the toolkit for supporting formal verification of functional data-flow parallel programs in the Pifagor Language. The method of deduction based on Hoare logic is used for formal verification. A proof process is considered as a tree where each node is a program data-flow graph, whose edges are marked with formulas in a specification language. The tree root is the initial Hoare triple, namely the program data-flow graph with a precondition and a postcondition. In this article basic transformations of the data-flow graph are considered: edge marking, equivalent transformation, splitting, folding of the program. By means of these transformations the initial triple is being transformed and finally is reduced to a set of formulas in the specification language. If all of these formulas are identically true, then the program is correct. Architecture of the toolkit for supporting formal verification of functional data-flow parallel programs is proposed, which allows to construct a proof three. The implementation of the toolkit is introduced and its main functionality is considered.