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Dipoppa, G.; D'Alessandro, G.; Semprini, R.; Tronci, E. |
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Title |
Integrating Automatic Verification of Safety Requirements in Railway Interlocking System Design |
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Conference Article |
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2001 |
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High Assurance Systems Engineering, 2001. Sixth IEEE International Symposium on |
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209-219 |
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A railway interlocking system (RIS) is an embedded system (namely a supervisory control system) that ensures the safe, operation of the devices in a railway station. RIS is a safety critical system. We explore the possibility of integrating automatic formal verification methods in a given industry RIS design flow. The main obstructions to be overcome in our work are: selecting a formal verification tool that is efficient enough to solve the verification problems at hand; and devising a cost effective integration strategy for such tool. We were able to devise a successful integration strategy meeting the above constraints without requiring major modification in the pre-existent design flow nor retraining of personnel. We run verification experiments for a RIS designed for the Singapore Subway. The experiments show that the RIS design flow obtained from our integration strategy is able to automatically verify real life RIS designs. |
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IEEE Computer Society |
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Albuquerque, NM, USA |
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0-7695-1275-5 |
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yes |
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Sapienza @ mari @ hase01 |
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45 |
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Author |
Della Penna, Giuseppe; Magazzeni, Daniele; Tofani, Alberto; Intrigila, Benedetto; Melatti, Igor; Tronci, Enrico |
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Title |
Automatic Synthesis of Robust Numerical Controllers |
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Conference Article |
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2007 |
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Icas '07 |
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4 |
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A major problem of numerical controllers is their robustness, i.e. the state read from the plant may not be in the controller table, although it may be close to some states in the table. For continuous systems, this problem is typically handled by interpolation techniques. Unfortunately, when the plant contains both continuous and discrete variables, the interpolation approach does not work well. To cope with this kind of systems, we propose a general methodology that exploits explicit model checking in an innovative way to automatically synthesize a (time-) optimal numerical controller from a plant specification and apply an optimized strengthening algorithm only on the most significant states, in order to reach an acceptable robustness degree. We implemented all the algorithms within our CGMurphi tool, an extension of the well-known CMurphi verifier, and tested the effectiveness of our approach by applying it to the well-known truck and trailer obstacles avoidance problem. |
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IEEE Computer Society |
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0-7695-2859-5 |
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yes |
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Call Number |
Sapienza @ mari @ Dmtimt07 |
Serial |
89 |
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Author |
Sinisi, S.; Alimguzhin, V.; Mancini, T.; Tronci, E. |
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Title |
Reconciling interoperability with efficient Verification and Validation within open source simulation environments |
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Journal Article |
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Year |
2021 |
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Simulation Modelling Practice and Theory |
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102277 |
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Simulation, Verification and Validation, Interoperability, FMI/FMU, Model Exchange, Cyber-Physical Systems |
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Abstract |
A Cyber-Physical System (CPS) comprises physical as well as software subsystems. Simulation-based approaches are typically used to support design and Verification and Validation (V&V) of CPSs in several domains such as: aerospace, defence, automotive, smart grid and healthcare. Accordingly, many simulation-based tools are available to support CPS design. This, on one side, enables designers to choose the toolchain that best suits their needs, on the other side poses huge interoperability challenges when one needs to simulate CPSs whose subsystems have been designed and modelled using different toolchains. To overcome such an interoperability problem, in 2010 the Functional Mock-up Interface (FMI) has been proposed as an open standard to support both Model Exchange (ME) and Co-Simulation (CS) of simulation models created with different toolchains. FMI has been adopted by several modelling and simulation environments. Models adhering to such a standard are called Functional Mock-up Units (FMUs). Indeed FMUs play an essential role in defining complex CPSs through, e.g., the System Structure and Parametrization (SSP) standard. Simulation-based V&V of CPSs typically requires exploring different simulation scenarios (i.e., exogenous input sequences to the CPS under design). Many such scenarios have a shared prefix. Accordingly, to avoid simulating many times such shared prefixes, the simulator state at the end of a shared prefix is saved and then restored and used as a start state for the simulation of the next scenario. In this context, an important FMI feature is the capability to save and restore the internal FMU state on demand. This is crucial to increase efficiency of simulation-based V&V. Unfortunately, the implementation of this feature is not mandatory and it is available only within some commercial software. As a result, the interoperability enabled by the FMI standard cannot be fully exploited for V&V when using open-source simulation environments. This motivates developing such a feature for open-source CPS simulation environments. Accordingly, in this paper, we focus on JModelica, an open-source modelling and simulation environment for CPSs based on an open standard modelling language, namely Modelica. We describe how we have endowed JModelica with our open-source implementation of the FMI 2.0 functions needed to save and restore internal states of FMUs for ME. Furthermore, we present experimental results evaluating, through 934 benchmark models, correctness and efficiency of our extended JModelica. Our experimental results show that simulation-based V&V is, on average, 22 times faster with our get/set functionality than without it. |
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1569-190x |
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MCLab @ davi @ Sinisi2021102277 |
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186 |
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Della Penna, Giuseppe; Tofani, Alberto; Pecorari, Marcello; Raparelli, Orazio; Intrigila, Benedetto; Melatti, Igor; Tronci, Enrico |
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Title |
A Case Study on Automated Generation of Integration Tests |
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Conference Article |
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2006 |
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Fdl |
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278-284 |
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Ecsi |
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978-3-00-019710-9 |
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yes |
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Call Number |
Sapienza @ mari @ Dtprimt06 |
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27 |
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Author |
Cesta, Amedeo; Fratini, Simone; Orlandini, Andrea; Finzi, Alberto; Tronci, Enrico |
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Title |
Flexible Plan Verification: Feasibility Results |
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Journal Article |
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2011 |
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Fundamenta Informaticae |
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107 |
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2 |
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111-137 |
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yes |
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Sapienza @ mari @ fi11 |
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15 |
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Cesta, Amedeo; Finzi, Alberto; Fratini, Simone; Orlandini, Andrea; Tronci, Enrico |
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Title |
Flexible Timeline-Based Plan Verification |
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Conference Article |
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2009 |
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KI 2009: Advances in Artificial Intelligence, 32nd Annual German Conference on AI, Paderborn, Germany, September 15-18, 2009. Proceedings |
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49-56 |
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Springer |
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Mertsching, Bärbel; Hund, M.; Aziz, M.Z. |
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Lecture Notes in Computer Science |
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5803 |
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978-3-642-04616-2 |
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yes |
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Sapienza @ mari @ Cffot09 |
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21 |
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Cesta, Amedeo; Finzi, Alberto; Fratini, Simone; Orlandini, Andrea; Tronci, Enrico |
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Flexible Plan Verification: Feasibility Results |
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Conference Article |
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2009 |
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16th RCRA International Workshop on “Experimental evaluation of algorithms for solving problems with combinatorial explosion” (RCRA). Proceedings |
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yes |
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Sapienza @ mari @ Rcra09 |
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22 |
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Author |
Bobbio, Andrea; Ciancamerla, Ester; Minichino, Michele; Tronci, Enrico |
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Title |
Functional analysis of a telecontrol system and stochastic measures of its GSM/GPRS connections |
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2005 |
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Archives of Transport – International Journal of Transport Problems |
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17 |
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3-4 |
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Sapienza @ mari @ jtp05 |
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31 |
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Author |
Böhm, Corrado; Tronci, Enrico |
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Title |
About Systems of Equations, X-Separability, and Left-Invertibility in the lambda-Calculus |
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1991 |
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Inf. Comput. |
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90 |
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1-32 |
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Sapienza @ mari @ infcomp91 |
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59 |
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Böhm, Corrado; Piperno, Adolfo; Tronci, Enrico |
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Title |
Solving Equations in λ-calculus |
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1989 |
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Proc. of: Logic Colloquium 88 |
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Padova - Italy |
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Sapienza @ mari @ logic-colloquium-88 |
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62 |
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