| Records |
| Author |
Gribaudo, Marco; Horváth, Andras; Bobbio, Andrea; Tronci, Enrico; Ciancamerla, Ester; Minichino, Michele |
| Title |
Model-Checking Based on Fluid Petri Nets for the Temperature Control System of the ICARO Co-generative Plant |
Type |
Conference Article |
| Year |
2002 |
Publication |
21st International Conference on Computer Safety, Reliability and Security (SAFECOMP) |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
273-283 |
| Keywords |
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| Abstract |
The modeling and analysis of hybrid systems is a recent and challenging research area which is actually dominated by two main lines: a functional analysis based on the description of the system in terms of discrete state (hybrid) automata (whose goal is to ascertain for conformity and reachability properties), and a stochastic analysis (whose aim is to provide performance and dependability measures). This paper investigates a unifying view between formal methods and stochastic methods by proposing an analysis methodology of hybrid systems based on Fluid Petri Nets (FPN). It is shown that the same FPN model can be fed to a functional analyser for model checking as well as to a stochastic analyser for performance evaluation. We illustrate our approach and show its usefulness by applying it to a “real world  hybrid system: the temperature control system of a co-generative plant. |
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Thesis |
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| Publisher |
Springer |
Place of Publication  |
Catania, Italy |
Editor |
Anderson, S.; Bologna, S.; Felici, M. |
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Series Title |
Lecture Notes in Computer Science |
Abbreviated Series Title |
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| Series Volume |
2434 |
Series Issue |
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Edition |
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| ISSN |
3-540-44157-3 |
ISBN |
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Expedition |
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| Notes |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ safecomp02 |
Serial |
42 |
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| Author |
Tronci, Enrico |
| Title |
Automatic Synthesis of Controllers from Formal Specifications |
Type |
Conference Article |
| Year |
1998 |
Publication |
Proc of 2nd IEEE International Conference on Formal Engineering Methods (ICFEM) |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
134-143 |
| Keywords |
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| Abstract |
Many safety critical reactive systems are indeed embedded control systems. Usually a control system can be partitioned into two main subsystems: a controller and a plant. Roughly speaking: the controller observes the state of the plant and sends commands (stimulus) to the plant to achieve predefined goals. We show that when the plant can be modeled as a deterministic finite state system (FSS) it is possible to effectively use formal methods to automatically synthesize the program implementing the controller from the plant model and the given formal specifications for the closed loop system (plant+controller). This guarantees that the controller program is correct by construction. To the best of our knowledge there is no previously published effective algorithm to extract executable code for the controller from closed loop formal specifications. We show practical usefulness of our techniques by giving experimental results on their use to synthesize C programs implementing optimal controllers (OCs) for plants with more than 109 states. |
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Place of Publication |
Brisbane, Queensland, Australia |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ icfem98 |
Serial |
52 |
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| Author |
Fantechi, Alessandro; Gnesi, Stefania; Mazzanti, Franco; Pugliese, Rosario; Tronci, Enrico |
| Title |
A Symbolic Model Checker for ACTL |
Type |
Conference Article |
| Year |
1998 |
Publication |
International Workshop on Current Trends in Applied Formal Method (FM-Trends) |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
228-242 |
| Keywords |
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| Abstract |
We present SAM, a symbolic model checker for ACTL, the action-based version of CTL. SAM relies on implicit representations of Labeled Transition Systems (LTSs), the semantic domain for ACTL formulae, and uses symbolic manipulation algorithms. SAM has been realized by translating (networks of) LTSs and, possibly recursive, ACTL formulae into BSP (Boolean Symbolic Programming), a programming language aiming at defining computations on boolean functions, and by using the BSP interpreter to carry out computations (i.e. verifications). |
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| Publisher |
Springer |
Place of Publication |
Boppard, Germany |
Editor |
Hutter, D.; Stephan, W.; Traverso, P.; Ullmann, M. |
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Series Title |
Lecture Notes in Computer Science |
Abbreviated Series Title |
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| Series Volume |
1641 |
Series Issue |
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Edition |
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| ISSN |
3-540-66462-9 |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ fm-trends98 |
Serial |
51 |
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| Author |
Della Penna, Giuseppe; Intrigila, Benedetto; Melatti, Igor; Tronci, Enrico; Venturini Zilli, Marisa |
| Title |
Finite horizon analysis of Markov Chains with the Mur$\varphi$ verifier |
Type |
Journal Article |
| Year |
2006 |
Publication |
Int. J. Softw. Tools Technol. Transf. |
Abbreviated Journal |
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| Volume |
8 |
Issue |
4 |
Pages |
397-409 |
| Keywords |
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| Abstract |
In this paper we present an explicit disk-based verification algorithm for Probabilistic Systems defining discrete time/finite state Markov Chains. Given a Markov Chain and an integer k (horizon), our algorithm checks whether the probability of reaching an error state in at most k steps is below a given threshold. We present an implementation of our algorithm within a suitable extension of the Mur$\varphi$ verifier. We call the resulting probabilistic model checker FHP-Mur$\varphi$ (Finite Horizon Probabilistic Mur$\varphi$). We present experimental results comparing FHP-Mur$\varphi$ with (a finite horizon subset of) PRISM, a state-of-the-art symbolic model checker for Markov Chains. Our experimental results show that FHP-Mur$\varphi$ can handle systems that are out of reach for PRISM, namely those involving arithmetic operations on the state variables (e.g. hybrid systems). |
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| Publisher |
Springer-Verlag |
Place of Publication |
Berlin, Heidelberg |
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Edition |
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| ISSN |
1433-2779 |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ Dimtz06 |
Serial |
78 |
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| Author |
Tronci, Enrico |
| Title |
Equational Programming in lambda-calculus |
Type |
Conference Article |
| Year |
1991 |
Publication |
Sixth Annual IEEE Symposium on Logic in Computer Science (LICS) |
Abbreviated Journal |
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Issue |
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Pages |
191-202 |
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| Publisher |
IEEE Computer Society |
Place of Publication |
Amsterdam, The Netherlands |
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ISBN |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ lics91 |
Serial |
58 |
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| Author |
Dipoppa, G.; D'Alessandro, G.; Semprini, R.; Tronci, E. |
| Title |
Integrating Automatic Verification of Safety Requirements in Railway Interlocking System Design |
Type |
Conference Article |
| Year |
2001 |
Publication |
High Assurance Systems Engineering, 2001. Sixth IEEE International Symposium on |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
209-219 |
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| Abstract |
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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| Publisher |
IEEE Computer Society |
Place of Publication |
Albuquerque, NM, USA |
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Series Issue |
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Edition |
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| ISSN |
0-7695-1275-5 |
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| Notes |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ hase01 |
Serial |
45 |
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| Author |
Della Penna, Giuseppe; Tofani, Alberto; Pecorari, Marcello; Raparelli, Orazio; Intrigila, Benedetto; Melatti, Igor; Tronci, Enrico |
| Title |
A Case Study on Automated Generation of Integration Tests |
Type |
Conference Article |
| Year |
2006 |
Publication |
Fdl |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
278-284 |
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| Publisher |
Ecsi |
Place of Publication |
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Editor |
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Original Title |
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Series Title |
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Series Issue |
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Edition |
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| ISSN |
978-3-00-019710-9 |
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Medium |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ Dtprimt06 |
Serial |
27 |
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| Author |
Cavaliere, Federico; Mari, Federico; Melatti, Igor; Minei, Giovanni; Salvo, Ivano; Tronci, Enrico; Verzino, Giovanni; Yushtein, Yuri |
| Title |
Model Checking Satellite Operational Procedures |
Type |
Conference Article |
| Year |
2011 |
Publication |
DAta Systems In Aerospace (DASIA), Org. EuroSpace, Canadian Space Agency, CNES, ESA, EUMETSAT. San Anton, Malta, EuroSpace. |
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Issue |
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We present a model checking approach for the automatic verification of satellite operational procedures (OPs). Building a model for a complex system as a satellite is a hard task. We overcome this obstruction by using a suitable simulator (SIMSAT) for the satellite. Our approach aims at improving OP quality assurance by automatic exhaustive exploration of all possible simulation scenarios. Moreover, our solution decreases OP verification costs by using a model checker (CMurphi) to automatically drive the simulator. We model OPs as user-executed programs observing the simulator telemetries and sending telecommands to the simulator. In order to assess feasibility of our approach we present experimental results on a simple meaningful scenario. Our results show that we can save up to 90% of verification time. |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ Dasia11 |
Serial |
13 |
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| Author |
Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico |
| Title |
From Boolean Relations to Control Software |
Type |
Conference Article |
| Year |
2011 |
Publication |
Proceedings of ICSEA 2011, The Sixth International Conference on Software Engineering Advances |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
528-533 |
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| Abstract |
Many software as well digital hardware automatic synthesis methods define the set of implementations meeting the given system specifications with a boolean relation K. In such a context a fundamental step in the software (hardware) synthesis process is finding effective solutions to the functional equation defined by K. This entails finding a (set of) boolean function(s) F (typically represented using OBDDs, Ordered Binary Decision Diagrams) such that: 1) for all x for which K is satisfiable, K(x, F(x)) = 1 holds; 2) the implementation of F is efficient with respect to given implementation parameters such as code size or execution time. While this problem has been widely studied in digital hardware synthesis, little has been done in a software synthesis context. Unfortunately the approaches developed for hardware synthesis cannot be directly used in a software context. This motivates investigation of effective methods to solve the above problem when F has to be implemented with software. In this paper we present an algorithm that, from an OBDD representation for K, generates a C code implementation for F that has the same size as the OBDD for F and a WCET (Worst Case Execution Time) linear in nr, being n = |x| the number of input arguments for functions in F and r the number of functions in F. |
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| Publisher |
ThinkMind |
Place of Publication |
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Series Issue |
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Edition |
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| ISSN |
978-1-61208-165-6 |
ISBN |
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| Notes |
Best Paper Award |
Approved |
yes |
| Call Number |
Sapienza @ mari @ icsea11 |
Serial |
14 |
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| Author |
Cesta, Amedeo; Fratini, Simone; Orlandini, Andrea; Finzi, Alberto; Tronci, Enrico |
| Title |
Flexible Plan Verification: Feasibility Results |
Type |
Journal Article |
| Year |
2011 |
Publication |
Fundamenta Informaticae |
Abbreviated Journal |
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| Volume |
107 |
Issue |
2 |
Pages |
111-137 |
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Expedition |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ fi11 |
Serial |
15 |
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