(A) all 5596 labelled sparse paving rank-4 matroids on 7 elements: failures=0; (#circuit-hyperplanes, r') counts: [((0, 7), 1), ((1, 7), 35), ((2, 7), 385), ((3, 7), 1575), ((4, 7), 2310), ((5, 7), 1050), ((6, 7), 210), ((7, 7), 30)] [175s]
(B) 3000 random sparse paving matroids of rank 4 on 8: failures=0; r' distribution [(7, 3000)] [483s]
(B) 800 random sparse paving matroids of rank 5 on 9: failures=0; r' distribution [(9, 800)] [1178s]
(C) 1500 random pairs of sparse paving matroids on 8 elements (ranks 2..5): failures=0 [1315s]
