%0 Conference Proceedings %T Parameter Synthesis Algorithms for Parametric Interval Markov Chains %+ Laboratoire d'Informatique de Paris-Nord (LIPN) %+ University of Twente %A Petrucci, Laure %A Pol, Jaco, van De %< avec comité de lecture %( Lecture Notes in Computer Science %B 38th International Conference on Formal Techniques for Distributed Objects, Components, and Systems (FORTE) %C Madrid, Spain %Y Christel Baier %Y Luís Caires %I Springer International Publishing %3 Formal Techniques for Distributed Objects, Components, and Systems %V LNCS-10854 %P 121-140 %8 2018-06-18 %D 2018 %R 10.1007/978-3-319-92612-4_7 %Z Computer Science [cs] %Z Computer Science [cs]/Networking and Internet Architecture [cs.NI]Conference papers %X This paper considers the consistency problem for Parametric Interval Markov Chains. In particular, we introduce a co-inductive definition of consistency, which improves and simplifies previous inductive definitions considerably. The equivalence of the inductive and co-inductive definitions has been formally proved in the interactive theorem prover PVS.These definitions lead to forward and backward algorithms, respectively, for synthesizing an expression for all parameters for which a given PIMC is consistent. We give new complexity results when tackling the consistency problem for IMCs (i.e. without parameters). We provide a sharper upper bound, based on the longest simple path in the IMC. The algorithms are also optimized, using different techniques (dynamic programming cache, polyhedra representation, etc.). They are evaluated on a prototype implementation. For parameter synthesis, we use Constraint Logic Programming and the PARMA library for convex polyhedra. %G English %Z TC 6 %Z WG 6.1 %2 https://inria.hal.science/hal-01824814/document %2 https://inria.hal.science/hal-01824814/file/469043_1_En_7_Chapter.pdf %L hal-01824814 %U https://inria.hal.science/hal-01824814 %~ UNIV-PARIS13 %~ CNRS %~ LIPN %~ IFIP-LNCS %~ IFIP %~ IFIP-TC %~ IFIP-WG %~ IFIP-TC6 %~ IFIP-WG6-1 %~ USPC %~ IFIP-FORTE %~ IFIP-DISCOTEC %~ GALILE %~ IFIP-LNCS-10854 %~ SORBONNE-PARIS-NORD