N=4 K=2 MAXMULT=2: instances with all sets convex: 247248 (disagreements: 0); instances with a non-convex set: 137664
non-convex instances by (PC, LOC, ARB):
    (False, False, False) 118224
    (False, True, False) 24
    (True, False, False) 5496
    (True, True, True) 13920
first example of [PC and not ARB]: {'arcs': [(1, 2), (2, 3)], 'roots': (0, 1), 'sets': [[0], [1, 3]], 'convex': [True, False]}
first example of [LOC and not ARB]: {'arcs': [(0, 1), (1, 2), (1, 3), (2, 3)], 'roots': (1, 0), 'sets': [[1, 3], [0, 1, 2, 3]], 'convex': [False, True]}
first example of [PC and LOC and not ARB]: none
first example of [ARB and not PC]: none
first example of [ARB and not LOC]: none
