Simple steady state initialization of an FMU, together with a
re-initialization of the state at an event, leading to a linear
algebraic system of equations during initialization
With this test model the following properties are tested:
Defining an FMU with incomplete initialization (so this FMU can
only be simulated if additional initialization conditions are
defined in the environment where the FMU is imported).
In the environment one instance is defined with steady-state
initialization in an initial equation section.
This FMU leads to a linear algebraic equation over the FMU
during initialization.
At an event instant, the internal state is re-initialized from
the environment.