| Records |
| Author |
Della Penna, Giuseppe; Magazzeni, Daniele; Tofani, Alberto; Intrigila, Benedetto; Melatti, Igor; Tronci, Enrico |
| Title |
Automatic Synthesis of Robust Numerical Controllers |
Type  |
Conference Article |
| Year |
2007 |
Publication |
Icas '07 |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
4 |
| Keywords |
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| Abstract |
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. |
| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
IEEE Computer Society |
Place of Publication |
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Editor |
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| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0-7695-2859-5 |
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 @ Dmtimt07 |
Serial |
89 |
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| Author |
Della Penna, Giuseppe; Intrigila, Benedetto; Melatti, Igor; Tronci, Enrico; Venturini Zilli, Marisa |
| Title |
Finite Horizon Analysis of Stochastic Systems with the Mur$\varphi$ Verifier |
Type |
Conference Article |
| Year |
2003 |
Publication |
Theoretical Computer Science, 8th Italian Conference, ICTCS 2003, Bertinoro, Italy, October 13-15, 2003, Proceedings |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
58-71 |
| Keywords |
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| Abstract |
Many reactive systems are actually Stochastic Processes. Automatic analysis of such systems is usually very difficult thus typically one simplifies the analysis task by using simulation or by working on a simplified model (e.g. a Markov Chain). We present a Finite Horizon Probabilistic Model Checking approach which essentially can handle the same class of stochastic processes of a typical simulator. This yields easy modeling of the system to be analyzed together with formal verification capabilities. Our approach is based on a suitable disk based extension of the Mur$\varphi$ verifier. Moreover we present experimental results showing effectiveness of our approach. |
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Thesis |
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| Publisher |
Springer |
Place of Publication |
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Editor |
Blundo, C.; Laneve, C. |
| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
Lecture Notes in Computer Science |
Abbreviated Series Title |
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| Series Volume |
2841 |
Series Issue |
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Edition |
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| ISSN |
3-540-20216-1 |
ISBN |
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Medium |
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| Area |
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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 @ DIMTZ03c |
Serial |
90 |
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| Author |
Mari, Federico; Tronci, Enrico |
| Title |
CEGAR Based Bounded Model Checking of Discrete Time Hybrid Systems |
Type |
Conference Article |
| Year |
2007 |
Publication |
Hybrid Systems: Computation and Control (HSCC 2007) |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
399-412 |
| Keywords |
Model Checking, Abstraction, CEGAR, SAT, Hybrid Systems, DTHS |
| Abstract |
Many hybrid systems can be conveniently modeled as Piecewise Affine Discrete Time Hybrid Systems PA-DTHS. As well known Bounded Model Checking (BMC) for such systems comes down to solve a Mixed Integer Linear Programming (MILP) feasibility problem. We present a SAT based BMC algorithm for automatic verification of PA-DTHSs. Using Counterexample Guided Abstraction Refinement (CEGAR) our algorithm gradually transforms a PA-DTHS verification problem into larger and larger SAT problems. Our experimental results show that our approach can handle PA-DTHSs that are more then 50 times larger than those that can be handled using a MILP solver. |
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Thesis |
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| Publisher |
Springer |
Place of Publication |
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Editor |
Bemporad, A.; Bicchi, A.; Buttazzo, G.C. |
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Summary Language |
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Original Title |
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Series Title |
Lecture Notes in Computer Science |
Abbreviated Series Title |
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| Series Volume |
4416 |
Series Issue |
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Edition |
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ISBN |
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Medium |
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Expedition |
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Conference |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ MarTro07 |
Serial |
92 |
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| Author |
Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico; Alvisi, Lorenzo; Clement, Allen; Li, Harry |
| Title |
Model Checking Nash Equilibria in MAD Distributed Systems |
Type |
Conference Article |
| Year |
2008 |
Publication |
FMCAD '08: Proceedings of the 2008 International Conference on Formal Methods in Computer-Aided Design |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
1-8 |
| Keywords |
Model Checking, MAD Distributed System, Nash Equilibrium |
| Abstract |
We present a symbolic model checking algorithm for verification of Nash equilibria in finite state mechanisms modeling Multiple Administrative Domains (MAD) distributed systems. Given a finite state mechanism, a proposed protocol for each agent and an indifference threshold for rewards, our model checker returns PASS if the proposed protocol is a Nash equilibrium (up to the given indifference threshold) for the given mechanism, FAIL otherwise. We implemented our model checking algorithm inside the NuSMV model checker and present experimental results showing its effectiveness for moderate size mechanisms. For example, we can handle mechanisms which corresponding normal form games would have more than $10^20$ entries. To the best of our knowledge, no model checking algorithm for verification of mechanism Nash equilibria has been previously published. |
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Thesis |
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| Publisher |
IEEE Press |
Place of Publication |
Piscataway, NJ, USA |
Editor |
Cimatti, A.; Jones, R. |
| Language |
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Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Series Issue |
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Edition |
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| ISSN |
978-1-4244-2735-2 |
ISBN |
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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 @ MarMelSalTroAlvCle08 |
Serial |
93 |
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| Author |
Chierichetti, Flavio; Lattanzi, Silvio; Mari, Federico; Panconesi, Alessandro |
| Title |
On Placing Skips Optimally in Expectation |
Type |
Conference Article |
| Year |
2008 |
Publication |
Web Search and Web Data Mining (WSDM 2008) |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
15-24 |
| Keywords |
Information Retrieval |
| Abstract |
We study the problem of optimal skip placement in an inverted list. Assuming the query distribution to be known in advance, we formally prove that an optimal skip placement can be computed quite efficiently. Our best algorithm runs in time O(n log n), n being the length of the list. The placement is optimal in the sense that it minimizes the expected time to process a query. Our theoretical results are matched by experiments with a real corpus, showing that substantial savings can be obtained with respect to the tra- ditional skip placement strategy, that of placing consecutive skips, each spanning sqrt(n) many locations. |
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Thesis |
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| Publisher |
Acm |
Place of Publication |
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Editor |
Najork, M.; Broder, A.Z.; Chakrabarti, S. |
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Conference |
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| Notes |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ ChiLatMar08 |
Serial |
94 |
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| Author |
Alimguzhin, Vadim; Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico |
| Title |
Automatic Control Software Synthesis for Quantized Discrete Time Hybrid Systems |
Type |
Conference Article |
| Year |
2012 |
Publication |
Proceedings of the 51th IEEE Conference on Decision and Control, CDC 2012, December 10-13, 2012, Maui, HI, USA |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
6120-6125 |
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| Publisher |
IEEE |
Place of Publication |
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Series Title |
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Series Issue |
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Edition |
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ISBN |
978-1-4673-2065-8 |
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| Notes |
Techreport version can be found at http://arxiv.org/abs/1207.4098 |
Approved |
yes |
| Call Number |
Sapienza @ mari @ cdc12 |
Serial |
96 |
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| Author |
Alimguzhin, Vadim; Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico |
| Title |
On Model Based Synthesis of Embedded Control Software |
Type |
Conference Article |
| Year |
2012 |
Publication |
Proceedings of the 12th International Conference on Embedded Software, EMSOFT 2012, part of the Eighth Embedded Systems Week, ESWeek 2012, Tampere, Finland, October 7-12, 2012 |
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Issue |
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Pages |
227-236 |
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| Publisher |
ACM |
Place of Publication |
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Editor |
Ahmed Jerraya and Luca P. Carloni and Florence Maraninchi and John Regehr |
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Summary Language |
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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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ISBN |
978-1-4503-1425-1 |
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Conference |
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| Notes |
Techreport version can be found at arxiv.org |
Approved |
yes |
| Call Number |
Sapienza @ mari @ emsoft12 |
Serial |
97 |
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| Author |
Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico |
| Title |
Linear Constraints as a Modeling Language for Discrete Time Hybrid Systems |
Type |
Conference Article |
| Year |
2012 |
Publication |
Proceedings of ICSEA 2012, The Seventh International Conference on Software Engineering Advances |
Abbreviated Journal |
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Issue |
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Pages |
664-671 |
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| Publisher |
ThinkMind |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ icsea12 |
Serial |
98 |
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| Author |
Mari, Federico; Melatti, Igor; Salvo, Ivano; Tronci, Enrico |
| Title |
Control Software Visualization |
Type |
Conference Article |
| Year |
2012 |
Publication |
Proceedings of INFOCOMP 2012, The Second International Conference on Advanced Communications and Computation |
Abbreviated Journal |
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| Volume |
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Issue |
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Pages |
15-20 |
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| Publisher |
ThinkMind |
Place of Publication |
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Editor |
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978-1-61208-226-4 |
ISBN |
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| Notes |
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Approved |
yes |
| Call Number |
Sapienza @ mari @ infocomp2012 |
Serial |
100 |
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| Author |
Kuijpers, Ed; Carotenuto, Luigi; Malapert, Jean-Cristophe; Markov-Vetter, Daniela; Melatti, Igor; Orlandini, Andrea; Pinchuk, Ranni |
| Title |
Collaboration on ISS Experiment Data and Knowledge Representation |
Type |
Conference Article |
| Year |
2012 |
Publication |
Proc. of IAC 2012 |
Abbreviated Journal |
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| Volume |
D.5.11 |
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| Notes |
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Approved |
yes |
| Call Number |
Sapienza @ melatti @ |
Serial |
107 |
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