Here is a copy of the console log, after constantly failed to build ipsw file

Apr 8 14:58:11 Macintosh authexec: executing /usr/bin/bspatch
Apr 8 14:58:11 Macintosh authexec: executing /usr/bin/bspatch
Apr 8 14:58:11 Macintosh authexec: executing /usr/bin/bspatch
"disk4" unmounted.
"disk4" ejected.
Preparing imaging engine...
Reading Driver Descriptor Map (DDM : 0)...
(CRC32 $D33345F5: Driver Descriptor Map (DDM : 0))
Reading Apple (Apple_partition_map : 1)...
(CRC32 $C2242C20: Apple (Apple_partition_map : 1))
Reading Macintosh (Apple_Driver_ATAPI : 2)...
(CRC32 $C71C0011: Macintosh (Apple_Driver_ATAPI : 2))
Reading Mac_OS_X (Apple_HFSX : 3)...
(CRC32 $356F0C62: Mac_OS_X (Apple_HFSX : 3))
Reading (Apple_Free : 4)...
 
(CRC32 $00000000: (Apple_Free : 4))
Adding resources...
 
Elapsed Time: 2m 8.055s
File size: 129160314 bytes, Checksum: CRC32 $403FDD0D
Sectors processed: 546050, 504457 compressed
Speed: 1.9Mbytes/sec
Savings: 53.8%
created: /tmp/ipsw/rootfs.dmg
asr: unable to read partition map - -5308. error -5308.
asr: unable to get UDIF info from "/tmp/ipsw/rootfs.dmg" - -5308. error -5308.
asr: image scan failed - error -5308.