Abstract
We investigate the problem of parameter synthesis for time Petri nets with a cost variable that evolves both continuously with time, and discretely when firing transitions. More precisely, parameters are rational symbolic constants used for time constraints on the firing of transitions and we want to synthesise all their values such that the cost variable stays within a given budget.
We first prove that the mere existence of such values for the parameters is undecidable. We nonetheless provide a symbolic semi-algorithm that is proved both sound and complete when it terminates. We also show how to modify it for the case when parameters values are integers. Finally, we prove that this modified version terminates if parameters are bounded. While this is to be expected since there are now only a finite number of possible parameter values, this is interesting because the computation is symbolic and thus avoids an explicit enumeration of all those values. Furthermore, the result is a symbolic constraint representing a finite union of convex polyhedra that is easily amenable to further analysis through linear programming.
We finally report on the implementation of the approach in Romeo, a software tool for the analysis of hybrid extensions of time Petri nets.
This work is partially supported by the ANR national research program PACS (ANR-14-CE28-0002).
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Notes
- 1.
Every 200 t.u., since T1 is executed twice as often as T2, T1 is running during \((22+a)*2=44+2a\) t.u. whereas T2 is running during \(28+(76-2a)=104-2a\) t.u.
- 2.
To ensure a correct access to the cores, we could have added one place for each core and some arcs on each task to capture and release them but the resulting net would have been quite unreadable. Instead, we chose to add 2 integer variables C0 and C1 (both initialised to 0); a variable equal to 0 (resp. 1) obviously means the corresponding core is idle (resp. busy).
- 3.
The last term ensures that such cases where an instance of a task is activated while a previous one is running are heavily penalised.
References
Abdulla, P.A., Mayr, R.: Priced timed Petri nets. Log. Meth. Comput. Sci. 9(4) (2013)
Alur, R., Dill, D.: A theory of timed automata. Theor. Comput. Sci. 126(2), 183–235 (1994)
Alur, R., Henzinger, T.A., Vardi, M.Y.: Parametric real-time reasoning. In: ACM Symposium on Theory of Computing, pp. 592–601 (1993)
Alur, R., Torre, S.L., Pappas, G.J.: Optimal paths in weighted timed automata. Theor. Comput. Sci. 318(3), 297–322 (2004)
AUTOSAR: specification of RTE software. Technical report 4.4.0, October 2018
Bagnara, R., Hill, P., Zaffanella, E.: Not necessarily closed polyhedra and the double description method. Form. Asp. Comput. 17, 222–257 (2005)
Behrmann, G., et al.: Minimum-cost reachability for priced time automata. In: Di Benedetto, M.D., Sangiovanni-Vincentelli, A. (eds.) HSCC 2001. LNCS, vol. 2034, pp. 147–161. Springer, Heidelberg (2001). https://doi.org/10.1007/3-540-45351-2_15
Behrmann, G., Larsen, K.G., Rasmussen, J.I.: Optimal scheduling using priced timed automata. SIGMETRICS Perform. Eval. Rev. 32(4), 34–40 (2005)
Berthomieu, B., Diaz, M.: Modeling and verification of time dependent systems using time Petri nets. IEEE Trans. Soft. Eng. 17(3), 259–273 (1991)
Berthomieu, B., Menasche, M.: An enumerative approach for analyzing time Petri nets. In: IFIP, pp. 41–46. Elsevier Science Publishers (1983)
Boucheneb, H., Lime, D., Parquier, B., Roux, O.H., Seidner, C.: Optimal reachability in cost time Petri nets. In: Abate, A., Geeraerts, G. (eds.) FORMATS 2017. LNCS, vol. 10419, pp. 58–73. Springer, Cham (2017). https://doi.org/10.1007/978-3-319-65765-3_4
Bouyer, P., Colange, M., Markey, N.: Symbolic optimal reachability in weighted timed automata. In: Chaudhuri, S., Farzan, A. (eds.) CAV 2016. LNCS, vol. 9779, pp. 513–530. Springer, Cham (2016). https://doi.org/10.1007/978-3-319-41528-4_28
Hune, T., Romijn, J., Stoelinga, M., Vaandrager, F.: Linear parametric model checking of timed automata. J. Log. Algebr. Program. 52–53, 183–220 (2002)
Jovanović, A.: Parametric verification of timed systems. Ph.D. thesis, École Centrale Nantes, Nantes, France (2013)
Jovanović, A., Lime, D., Roux, O.H.: Integer parameter synthesis for real-time systems. IEEE Trans. Softw. Eng. (TSE) 41(5), 445–461 (2015)
Larsen, K., et al.: As cheap as possible: effcient cost-optimal reachability for priced timed automata. In: Berry, G., Comon, H., Finkel, A. (eds.) CAV 2001. LNCS, vol. 2102, pp. 493–505. Springer, Heidelberg (2001). https://doi.org/10.1007/3-540-44585-4_47
Larsen, K.G., Pettersson, P., Yi, W.: Model-checking for real-time systems. In: Reichel, H. (ed.) FCT 1995. LNCS, vol. 965, pp. 62–88. Springer, Heidelberg (1995). https://doi.org/10.1007/3-540-60249-6_41
Minsky, M.: Computation: Finite and Infinite Machines. Prentice Hall, Englewood Cliffs (1967)
Naumann, N.: AUTOSAR runtime environment and virtual function bus. Technical report, Hasso-Plattner-Institut (2009)
Schrijver, A.: Theory of Linear and Integer Programming. Wiley, New York (1986)
Traonouez, L.-M., Lime, D., Roux, O.H.: Parametric model-checking of stopwatch Petri nets. J. Univers. Comput. Sci. 15(17), 3273–3304 (2009)
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Lime, D., Roux, O.H., Seidner, C. (2019). Parameter Synthesis for Bounded Cost Reachability in Time Petri Nets. In: Donatelli, S., Haar, S. (eds) Application and Theory of Petri Nets and Concurrency. PETRI NETS 2019. Lecture Notes in Computer Science(), vol 11522. Springer, Cham. https://doi.org/10.1007/978-3-030-21571-2_22
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