unknownsize.c: (in function uknSize1)
unknownsize.c:9:3: Possible out-of-bounds store:
    Unable to resolve constraint:
    requires maxSet(c @ unknownsize.c:9:3) >= 9
     needed to satisfy precondition:
    requires maxSet(c @ unknownsize.c:9:3) >= 9

Finished checking --- 1 code warning, as expected