The insertion sort code is taken from the Mälardalen WCET benchmark suite, but altered to move the inner loop into its own function for compatibility with the SEL4 tools.
The C parsing and graph export code in Insertsort.thy is based on the
examples in the graph-refine repository and the SEL4 code. The target.py
driver is based on the graph-refine ones, but has a little extra code added
to ignore the cycle counter variable in loops.