Failures-divergence Refinement Fdr2 User Manual

Failures - Divergence Refinement

Linking Theories of Concurrency

We construct a Galois connection between the theories that underlie CCS [7] and CSP [4]. It projects the complete transition system for CCS onto exactly the subset that satisfies the healthiness conditions of CSP. The construction applies to several varieties of both calculi: CCS with strong, weak or barbed simulation, and CSP with trace refinement or failures refinement, or failures/divergence...

Compositional Verification of a Network of CSP Processes: using FDR2 to verify refinement in the event of interface difference

The paper [5] presented an implementation relation formalising what it means for one process to “implement” another in the CSP (Communicating Sequential Processes, [15]) framework in the event that the two processes have different interfaces. An improved version of the relation appears in [6] and allows for compositional verification of a network of CSP processes. The model checker FDR2([15]) m...

FDR3 - A Modern Refinement Checker for CSP

FDR3 is a complete rewrite of the CSP refinement checker FDR2, incorporating a significant number of enhancements. In this paper we describe the operation of FDR3 at a high level and then give a detailed description of several of its more important innovations. This includes the new multi-core refinement-checking algorithm that is able to achieve a near linear speed up as the number of cores in...

Analysis of User query refinement behavior based on semantic features: user log analysis of Ganj database (IranDoc)

Background and Aim: Information systems cannot be well designed or developed without a clear understanding of needs of users, manner of their information seeking and evaluating. This research has been designed to analyze the Ganj (Iranian research institute of science and technology database) users’ query refinement behaviors via log analysis.    Methods: The method of this research is log anal...