| Records |
| Author |
Pugliese, Rosario; Tronci, Enrico |
| Title |
Automatic Verification of a Hydroelectric Power Plant |
Type |
Conference Article |
| Year |
1996 |
Publication |
Third International Symposium of Formal Methods Europe (FME), Co-Sponsored by IFIP WG 14.3 |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
425-444 |
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| Abstract |
We analyze the specification of a hydroelectric power plant by ENEL (the Italian Electric Company). Our goal is to show that for the specification of the plant (its control system in particular) some given properties hold. We were provided with an informal specification of the plant. From such informal specification we wrote a formal specification using the CCS/Meije process algebra formalism. We defined properties using μ-calculus. Automatic verification was carried out using model checking. This was done by translating our process algebra definitions (the model) and μ-calculus formulas into BDDs. In this paper we present the informal specification of the plant, its formal specification, some of the properties we verified and experimental results. |
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| Publisher |
Springer |
Place of Publication |
Oxford, UK |
Editor |
Gaudel, M.-C.; Woodcock, J. |
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Series Title |
Lecture Notes in Computer Science |
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| Series Volume |
1051 |
Series Issue |
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Edition |
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| ISSN |
3-540-60973-3 |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ fme96 |
Serial |
53 |
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| Author |
Tronci, Enrico |
| Title |
Equational Programming in Lambda-Calculus via SL-Systems. Part 1 |
Type |
Journal Article |
| Year |
1996 |
Publication |
Theoretical Computer Science |
Abbreviated Journal |
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| Volume |
160 |
Issue |
1&2 |
Pages |
145-184 |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ tcs96 |
Serial |
54 |
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| Author |
Tronci, Enrico |
| Title |
Equational Programming in Lambda-Calculus via SL-Systems. Part 2 |
Type |
Journal Article |
| Year |
1996 |
Publication |
Theoretical Computer Science |
Abbreviated Journal |
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| Volume |
160 |
Issue |
1&2 |
Pages |
185-216 |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ tcs96a |
Serial |
55 |
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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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| Volume |
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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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Approved |
yes |
| Call Number |
Sapienza @ mari @ lics91 |
Serial |
58 |
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| Author |
Bobbio, Andrea; Bologna, Sandro; Minichino, Michele; Ciancamerla, Ester; Incalcaterra, Piero; Kropp, Corrado; Tronci, Enrico |
| Title |
Advanced techniques for safety analysis applied to the gas turbine control system of Icaro co generative plant |
Type |
Conference Article |
| Year |
2001 |
Publication |
X Convegno Tecnologie e Sistemi Energetici Complessi |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
339-350 |
| Keywords |
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| Abstract |
The paper describes two complementary and integrable approaches, a probabilistic one and a deterministic one, based on classic and advanced modelling techniques for safety analysis of complex computer based systems. The probabilistic approach is based on classical and innovative probabilistic analysis methods. The deterministic approach is based on formal verification methods. Such approaches are applied to the gas turbine control system of ICARO co generative plant, in operation at ENEA CR Casaccia. The main difference between the two approaches, behind the underlining different theories, is that the probabilistic one addresses the control system by itself, as the set of sensors, processing units and actuators, while the deterministic one also includes the behaviour of the equipment under control which interacts with the control system. The final aim of the research, documented in this paper, is to explore an innovative method which put the probabilistic and deterministic approaches in a strong relation to overcome the drawbacks of their isolated, selective and fragmented use which can lead to inconsistencies in the evaluation results. |
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Place of Publication |
Genova, Italy |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ tesec01 |
Serial |
65 |
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| Author |
Intrigila, Benedetto; Salvo, Ivano; Sorgi, Stefano |
| Title |
A characterization of weakly Church-Rosser abstract reduction systems that are not Church-Rosser |
Type |
Journal Article |
| Year |
2001 |
Publication |
Information and Computation |
Abbreviated Journal |
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| Volume |
171 |
Issue |
2 |
Pages |
137-155 |
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| Abstract |
Basic properties of rewriting systems can be stated in the framework of abstract reduction systems (ARS). Properties like confluence (or Church-Rosser, CR) and weak confluence (or weak Church-Rosser, WCR) and their relationships can be studied in this setting: as a matter of fact, well-known counterexamples to the implication WCR CR have been formulated as ARS. In this paper, starting from the observation that such counterexamples are structurally similar, we set out a graph-theoretic characterization of WCR ARS that is not CR in terms of a suitable class of reduction graphs, such that in every WCR not CR ARS, we can embed at least one element of this class. Moreover, we give a tighter characterization for a restricted class of ARS enjoying a suitable regularity condition. Finally, as a consequence of our approach, we prove some interesting results about ARS using the mathematical tools developed. In particular, we prove an extension of the Newman’s lemma and we find out conditions that, once assumed together with WCR property, ensure the unique normal form property. The Appendix treats two interesting examples, both generated by graph-rewriting rules, with specific combinatorial properties. |
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| Publisher |
Academic Press, Inc. |
Place of Publication |
Duluth, MN, USA |
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Edition |
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| ISSN |
0890-5401 |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ Intrigila-Salvo-Sorgi:01 |
Serial |
68 |
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| Author |
Bucciarelli, Antonio; Piperno, Adolfo; Salvo, Ivano |
| Title |
Intersection types and λ-definability |
Type |
Journal Article |
| Year |
2003 |
Publication |
Mathematical Structures in Computer Science |
Abbreviated Journal |
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| Volume |
13 |
Issue |
1 |
Pages |
15-53 |
| Keywords |
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| Abstract |
This paper presents a novel method for comparing computational properties of λ-terms that are typeable with intersection types, with respect to terms that are typeable with Curry types. We introduce a translation from intersection typing derivations to Curry typeable terms that is preserved by β-reduction: this allows the simulation of a computation starting from a term typeable in the intersection discipline by means of a computation starting from a simply typeable term. Our approach proves strong normalisation for the intersection system naturally by means of purely syntactical techniques. The paper extends the results presented in Bucciarelli et al. (1999) to the whole intersection type system of Barendregt, Coppo and Dezani, thus providing a complete proof of the conjecture, proposed in Leivant (1990), that all functions uniformly definable using intersection types are already definable using Curry types. |
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| Publisher |
Cambridge University Press |
Place of Publication |
New York, NY, USA |
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Edition |
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| ISSN |
0960-1295 |
ISBN |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ Bucciarelli-Piperno-Salvo:MSCS-03 |
Serial |
69 |
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| Author |
Bucciarelli, Antonio; Salvo, Ivano |
| Title |
Totality, Definability and Boolean Circuits |
Type |
Journal Article |
| Year |
1998 |
Publication |
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Abbreviated Journal |
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| Volume |
1443 |
Issue |
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Pages |
808-819 |
| Keywords |
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| Abstract |
In the type frame originating from the flat domain of boolean values, we single out elements which are hereditarily total. We show that these elements can be defined, up to total equivalence, by sequential programs. The elements of an equivalence class of the totality equivalence relation (totality class) can be seen as different algorithms for computing a given set-theoretic boolean function. We show that the bottom element of a totality class, which is sequential, corresponds to the most eager algorithm, and the top to the laziest one. Finally we suggest a link between size of totality classes and a well known measure of complexity of boolean functions, namely their sensitivity. |
| Address |
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| Publisher |
Springer |
Place of Publication |
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Editor |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ bucciarelli-salvo:98 |
Serial |
70 |
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| Author |
Bucciarelli, Antonio; de Lorenzis, Silvia; Piperno, Adolfo; Salvo, Ivano |
| Title |
Some Computational Properties of Intersection Types (Extended Abstract) |
Type |
Journal Article |
| Year |
1999 |
Publication |
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Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
109-118 |
| Keywords |
lambda calculusCurry types, intersection types, lambda-definability, lambda-terms, strong normalization |
| Abstract |
This paper presents a new method for comparing computation-properties of λ-terms typeable with intersection types with respect to terms typeable with Curry types. In particular, strong normalization and λ-definability are investigated. A translation is introduced from intersection typing derivations to Curry typeable terms; the main feature of the proposed technique is that the translation is preserved by β-reduction. This allows to simulate a computation starting from a term typeable in the intersection discipline by means of a computation starting from a simply typeable term. Our approach naturally leads to prove strong normalization in the intersection system by means of purely syntactical techniques. In addition, the presented method enables us to give a proof of a conjecture proposed by Leivant in 1990, namely that all functions uniformly definable using intersection types are already definable using Curry types. |
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IEEE Computer Society |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ bucciarelli-delorenzis-piperno-salvo:99 |
Serial |
71 |
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| Author |
Bono, V.; Salvo, I. |
| Title |
A CuCh Interpretation of an Object-Oriented Language |
Type |
Journal Article |
| Year |
2001 |
Publication |
Electronic Notes in Theoretical Computer Science |
Abbreviated Journal |
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| Volume |
50 |
Issue |
2 |
Pages |
159-177 |
| Keywords |
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| Abstract |
CuCh machine extends pure lambda–calculus with algebraic data types and provides a the possibility of defining functions over the disjoint sum of algebras. We exploit such natural form of overloading to define a functional interpretation of a simple, but significant fragment of a typical object-oriented language. |
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Elsevier |
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| Notes |
BOTH 2001, Bohm’s theorem: applications to Computer Science Theory (Satellite Workshop of ICALP 2001) |
Approved |
yes |
| Call Number |
Sapienza @ mari @ Bono-Salvo:BOTH01 |
Serial |
72 |
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