Formal Verification of Real-Time Function Blocks Using PVS

Formal Verification of Real-Time Function Blocks Using PVS

A critical step towards certifying safety-critical systems is to check their conformance to hard realtime requirements. A promising way to achieve this is by building the systems from pre-verified components and verifying their correctness in a compositional manner. We previously reported a formal approach to verifying function blocks (FBs) using tabular expressions and the PVS proof assistant....

Formal Verification of Medical Device User Interfaces Using PVS

We present a formal verification approach for detecting design issues related to user interaction, with a focus on user interface of medical devices. The approach makes a novel use of configuration diagrams proposed by Rushby to formally verify important human factors properties of user interface implementation. In particular, it first translates the software implementation of user interface in...

Formal Verification of Real time Software

The veri cation of functionality of the input output logic properties often composes the majority of software requirements analysis Automated theorem provers ATPs such as SRI s Prototype Veri cation System PVS have been successfully used in the formal veri cation of functional properties However such functional methods are not readily applicable to the veri cation of the real time software re q...

Formal Verification of Embedded Real-Time Systems

Formalizing and Verifying Function Blocks Using Tabular Expressions and PVS

Many industrial control systems use programmable logic controllers (PLCs) since they provide a highly reliable, off-the-shelf hardware platform. On the programming side, function blocks (FBs) are reusable components provided by the PLC supplier that can be combined to implement the required system behaviour. A higher quality system may be realized if the FBs are pre-certified to be compliant wi...