'A CFG with multiple nested loops:
for y in b:
for x in a:
# This loop has two back edges
if b:
continue
else:
continue
for z in c:
if z:
return ...'

def multiple_loops(self):

    g = self.from_adj_list({0: [7], 7: [10, 60], 10: [13], 13: [20], 20: [56, 23], 23: [32, 44], 32: [20], 44: [20], 56: [57], 57: [7], 60: [61], 61: [68], 68: [87, 71], 71: [80, 68], 80: [], 87: [88], 88: []})
    g.set_entry_point(0)
    g.process()
    return g
