That's right.

The clbitcrack has nothing to do with your AMD GPU. In order to utilize the GPU for this task you must use cuBitCrack.

the program skip private keys in amd rx580 but working fine with nvidia gtx 950m
anyone knows why?

amd rx580 command :
clbitcrack  -c -u -i test18.txt -o out.txt --device 1 --keyspace 2:FF

test18.txt contain:
1BgGZ9tcN4rm9KBzDn7KprQz87SZ26SAMH 0x1
1cMh228HTCiwS8ZsaakH8A8wze1JR5ZsP  0x2
1CUNEBjYrCn2y1SdiUMohaKUi4wpP326Lb 0x3
1JtK9CQw1syfWj1WtFMWomrYdV3W2tWBF9 0x4
17Vu7st1U1KwymUKU4jJheHHGRVNqrcfLD 0x5
1Cf2hs39Woi61YNkYGUAcohL2K2q4pawBq 0x6
19ZewH8Kk1PDbSNdJ97FP4EiCjTRaZMZQA 0x7
1EhqbyUMvvs7BfL8goY6qcPbD6YKfPqb7e 0x8
1HSxWThjiwbC4dJbXHMpBfwRenB12UguG5 0x9
13DaZ9nfmJLfzU6oBnD2sdCiDmf3M5fmLx 0xa
15wPJhwthAkBtUgx3qFEyCtnK7piuu6Xvr 0xb
1M9sZKsStVRZyBZSSVe13XMGRtCHkNj7VD 0xc
18xiXDdYhapNJoAp4UAkJa1WZT9U9FmQiD 0xd
1BS2vyPFUSDKfJKw35MyAAUvSzXpcBLgSJ 0xe
1FZoTz4UBrfjpf7DdGGuLdPBqSMx65tKuy 0xf
19p7ktDbdJnmV4YLC7zQ37RsYczMZJmd6q 0x11
18FtYoEJipP5bCJnjgWdeeEbxSvozSjEUA 0x12
1Ny3b8r8HhkQtwUBePqKdU31qBV1xWS64Q 0x13

output:
1cMh228HTCiwS8ZsaakH8A8wze1JR5ZsP 0000000000000000000000000000000000000000000000000000000000000002 02C6047F9441ED7D6D3045406E95C07CD85C778E4B8CEF3CA7ABAC09B95C709EE5
1JtK9CQw1syfWj1WtFMWomrYdV3W2tWBF9 0000000000000000000000000000000000000000000000000000000000000004 02E493DBF1C10D80F3581E4904930B1404CC6C13900EE0758474FA94ABE8C4CD13
1EhqbyUMvvs7BfL8goY6qcPbD6YKfPqb7e 0000000000000000000000000000000000000000000000000000000000000008 022F01E5E15CCA351DAFF3843FB70F3C2F0A1BDD05E5AF888A67784EF3E10A2A01
19p7ktDbdJnmV4YLC7zQ37RsYczMZJmd6q 0000000000000000000000000000000000000000000000000000000000000010 03E60FCE93B59E9EC53011AABC21C23E97B2A31369B87A5AE9C44EE89E2A6DEC0A