Team presentation

An embedded architecture is an artifact of heterogeneous constituents and at the crossing of several design viewpoints: software, embedded in hardware, interfaced with the physical world. Time takes different forms when observed from each of these viewpoints: continuous or discrete, event-based or time-triggered. Unfortunately, modeling and programming formalisms that represent software, hardware and physics significantly alter this perception of time. Moreover, time reasoning in system design is usually isolated to a specific design problem: simulation, profiling, performance, scheduling, parallelization, simulation. The aim of project-team TEA is to define conceptually unifying frameworks for reasoning on the composition and integration of cyber-physical systems. Tea aims at putting such reasoning to practice by revisiting analysis, verification and synthesis issues in real-time system design with soundness and compositionality gained from formalization.



Research themes

Time in system design

    •  Logic and calculi to model time(s) and concurrency
    •  Abstractions and refinements to formally relate time domains
    •  Verification of timed quantitative properties

    •  Conformance checking and synthesis of adapters
    •  Logical and quantitative reasoning for analysis and verification
    •  Type inference, abstract interpretation, SAT/SMT verification, proof
    •  Control and scheduler synthesis, abstract affine scheduling
    •  Proof theory, type theory, module systems, contract algebra

Artifacts for system design

  • ADFG: A versatile scheduler analysis and synthesis tool for SDF/CSDF implementing abstraction-refinement: ADFG
  • Polychrony on Polarsys: an Eclipse IWG Polarsys project for polychronous modeling, analysis and code generation
  • Tactics for the Keymaera X prover to automate the proof of contracts for the composition of hybrid system models

International and industrial relations

Projects and collaborations

  • CSC Doctoral Scholarship with ECNU (2015-2018)
  • Mitsubishi Electrics R&D doctoral grant (2019-2022)
  • Inria-DGA Doctoral grant (2017-2020)
  • Inria-MERCE (Mitsubishi R&D Europe) framework program (2018+)
  • Inria-MSR Doctoral grant (2018-2021)
  • Inria Project Lab “Future-proof IoT” (2019-2023)
  • Mitsubishi Electrics R&D doctoral grant (2019-2022)

International collaborations

  • Inria International Chair, Rajesh Gupta, UCSD (2017-2022)
  • Insa-Inria International Chair, Shuvra Bhattacharya (2018-2022)
  • Associate project COMPOSITE with UC San Diego, MESL (2017-2020)
  • Associate project CONVEX with ISCAS, Beihang, Nanhang and Nankai Universisties (2018-2021)

National collaborations


Former projects and collaborations

    •  Networks of excellence Artist, Artist 2, Artist Design (2000-2009)
    •  NSF-INRIA project BALBOA (2002-2009)
    •  DGE project TOPCASED (2005-2010)
    •  ANR project OPENEMBEDD (2006-2008, coordinator)
    •  IST project SPEEDS (2007)
    •  EADS Foundation grant (2006-2009)
    •  ANR project SPACIFY (2007-2010)
    •  ANR project FotoVP (2008-2010)
    •  Artemisia project CESAR (2009-2011)
    •  ITEA2 project OPEES (2010-2012)
    •  ANR project Verisync (2010-2014)
    •  INRIA associate project POLYCORE (2011-2013)
    •  Regional project VeriGALS (2011-2014)
    •  CORAC project CORAIL (2014-2017)
    •  FUI project P (2011-2015)
    •  Applied Science and Technology Research Institute (2015-2016)
    •  IIT Kanpur, India, INRIA International Partner
    •  The Embedded Systems Group at TU Kaiserslautern (2012-2015)
    •  The SAE committee for AADL (2012-2016)
    •  The Fermat Laboratory at Virginia Tech (2003-2015)

    •  ANR project FEEVER (2014-2017)
    •  Toyota Info-Technology Centre, Mountain View, CA (2014-2017)
    •  US Air Force Office for Scientific Research (2013-2017)