2 readers and 2 writers making 5 accesses each
read: 0
wrote: 1
read: 1
read: 1
wrote: 2
read: 2
wrote: 3
read: 3
read: 3
wrote: 4
read: 4
read: 4
wrote: 5
read: 5
wrote: 6
wrote: 7
read: 7
wrote: 8
wrote: 9
wrote: 10