Formalizing FreeRTOS: First Steps

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This paper presents the current state of the formal development of FreeRTOS, a real-time operating system. The goal of this effort is to address a scientific challenge and is realized within the scope of the Grand Challenge on Verified Software. The development is realized with the B method. A model of the main functionalities of the FreeRTOS is now available and can be a starting point to establish an agreed formal specification of FreeRTOS that can be used by the research community.