Addition on C version of CFD-mini for comparison purposes (still serial)

For now I am adding a single c version of the CFD-mini benchmark. Next up will be naive parallel for both chapel and c.
the number of cells should be 8 and the number of boxes 2.
In my .execopts file I have the following.
-b 2 -t 1 -c 8
This should be correct and when I run it locally the test passes.
The performance test is then run on a larger number of cells.
I guess I can't reproduce the problem - suggestions on how to proceed?