ちなみに、私の環境でのダンプ結果は下記になりました。
行数長いので、一部省略してます

ary_a = 0x7fff5fbff5d0
（中略）

ary_b = 0x7fff5fbff5b0
（中略）

ary_a_b = 0x7fff5fbff590
（中略）

pp = 0x7fff5fbff590
pp[0] = 0x7fff5fbff5d0
（中略）

pp[1] = 0x7fff5fbff5b0
（中略）
dumped start = 0x7fff5fbff5d0
00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
0x7fff5fbff5d0 03 02 01 00 07 06 05 04 0b 0a 09 08 0f 0e 0d 0c
0x7fff5fbff5e0 04 bb 00 00 05 ba 00 00 06 b9 00 00 07 b8 00 00
0x7fff5fbff5f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x7fff5fbff600 18 f6 bf 5f ff 7f 00 00 74 08 00 00 01 00 00 00
0x7fff5fbff610 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x7fff5fbff620 01 00 00 00 00 00 00 00 58 f7 bf 5f ff 7f 00 00
0x7fff5fbff630 00 00 00 00 00 00 00 00 bc f7 bf 5f ff 7f 00 00
0x7fff5fbff640 cc f7 bf 5f ff 7f 00 00 06 f8 bf 5f ff 7f 00 00