We consider the safety verification of controllers obtained via machine learning. This is an important problem as the employed machine learning techniques work well in practice, but cannot guarantee safety of the produced controller, which is typically represented as an artificial neural network. Nevertheless, such methods are used in safety-critical environments. In this paper we take a typica...

Safety verification of hybrid dynamical systems relies crucially on the ability to reason about reachable sets of continuous systems whose evolution is governed by a system of ordinary differential equations (ODEs). Verification tools are often restricted to handling a particular class of continuous systems, such as e.g. differential equations with constant right-hand sides, or systems of affin...

In Systems Engineering Verification and Testing for Reliability and Safety are the most complex, error-prone and expensive tasks. This paper explains how Model Based Systems Engineering Techniques and Methodologies, powered by SysML, can facilitate Agility in Design for Reliability and Safety of Mission-Critical Systems in several Industries like Aerospace, Medical, Automotive, Transportation. ...

Dynamically typed object-oriented languages enable programmers to write elegant, reusable and extensible programs. However, with the current methodology for program verification, the absence of static type information creates significant overhead. Our proposal is two-fold: First, we propose a layer of abstraction hiding the complexity of dynamic typing when provided with sufficient type informa...

Safety and failure in gas pipelines are very important in gas and petroleum industry. For this reason, it is important to study the effect of different parameters in order to reach the maximum safety in design and application. In this paper, a three dimensional finite element analysis is carried out to study the effect of crack length, crack depth, crack position, internal pressure and pipe thi...

most accidents happens because of lack of visibility and not driver’s reaction on time whenan accident occurs. increasing required time for driver’s reaction caused to decreasingaccidents on roadways .intelligent vehicle networks brings enough time for reaction by sendingalert and alternate messages to vehicles on roadway. main propose in this paper is aroundmodulation on reception interval saf...

This paper presents a formalisation of a subset of the C programming language, and a corresponding verification calculus, in the theorem prover Isabelle. There are of course many and varied approaches to the verification of safety-critical programs. The characteristics of our approach stem from the application domain: the certification of control software for autonomous mobile robots [3]. This ...

Complex behaviors that can be exhibited by hybrid systems make the verification of such systems both important and challenging. Due to the infinite number of possibilities taken by the continuous state and the uncertainties in the system, exhaustive simulation is impossible, and also computing the set of reachable states is generally intractable. Nevertheless, the ever-increasing presence of hy...

Computer aided formal methods have been very successful for the verification or at least enhanced debugging of hardware. The cost of correction of a hardware bug is huge enough to justify high investments in alternatives to testing such as correctness verification. This is not the case for software for which bugs are a quite common situation which can be easily handled through online updates. H...