./clBitCrack  -d 1 -b 72 -t 256 -p 1024 --keyspace 1ABBCE2000000000:1ABBCE3000000000 -o res61.txt 1AVJKwzs9AskraJLGHAZPiaZcrpDr1U6AB
[2019-03-04.19:49:36] [Info] Compression: compressed
[2019-03-04.19:49:36] [Info] Starting at: 0000000000000000000000000000000000000000000000001ABBCE2000000000
[2019-03-04.19:49:36] [Info] Ending at:   0000000000000000000000000000000000000000000000001ABBCE3000000000
[2019-03-04.19:49:36] [Info] Counting by: 0000000000000000000000000000000000000000000000000000000000000001
[2019-03-04.19:49:36] [Info] Compiling OpenCL kernels...
[2019-03-04.19:49:43] [Info] Initializing Ellesmere
[2019-03-04.19:49:45] [Info] Generating 18,874,368 starting points (720.0MB)
[2019-03-04.19:49:49] [Info] 10.0%
[2019-03-04.19:49:51] [Info] 20.0%
[2019-03-04.19:49:52] [Info] 30.0%
[2019-03-04.19:49:52] [Info] 40.0%
[2019-03-04.19:49:53] [Info] 50.0%
[2019-03-04.19:49:53] [Info] 60.0%
[2019-03-04.19:49:53] [Info] 70.0%
[2019-03-04.19:49:54] [Info] 80.0%
[2019-03-04.19:49:54] [Info] 90.0%
[2019-03-04.19:49:55] [Info] 100.0%
[2019-03-04.19:49:55] [Info] Done
[00:02:06] 1152/7536MB | 1 target 109.79 MKey/s (0000000FB6800000 remaining) [ETA 10.23 minutes]

This does not work ETA stays 10min for too long. And the "remaining" never goes below 0000000F00000000 ...
I think  that you may  have a declaration problem, your "remaining" integer may have been declared as a 32bit integer.