I0809 19:54:02.057523   679 multi_range_http_fetcher.cc:151] Received transfer complete.
update_engine[679]: I0809 19:54:02.057569   679 multi_range_http_fetcher.cc:108] TransferEnded w/ code 200
update_engine[679]: I0809 19:54:02.057615   679 multi_range_http_fetcher.cc:142] Done w/ all transfers
update_engine[679]: I0809 19:54:02.065363   679 update_attempter.cc:408] Download status: inactive
update_engine[679]: I0809 19:54:02.067025   679 payload_processor.cc:327] Verifying delta payload using public key: /usr/share/update_engine/update-payload-key.pub.pem
update_engine[679]: I0809 19:54:02.067302   679 payload_signer.cc:254] signature size = 528
update_engine[679]: E0809 19:54:02.067484   679 payload_processor.cc:368] Public key verification failed, thus update failed. Attached Signature:
update_engine[679]: I0809 19:54:02.067539   679 utils.cc:235] Logging array of length: 256
...
update_engine[679]: E0809 19:54:02.068634   679 payload_processor.cc:371] Computed Signature:
update_engine[679]: I0809 19:54:02.068676   679 utils.cc:235] Logging array of length: 256
...
update_engine[679]: E0809 19:17:48.458763   679 download_action.cc:108] Download of https://update.release.flatcar-linux.net/amd64-usr/2983.2.1/flatcar_production_update.gz failed due to payload verification error.
update_engine[679]: I0809 19:17:48.459182   679 action_processor.cc:68] ActionProcessor::ActionComplete: DownloadAction action failed. Aborting processing.
update_engine[679]: I0809 19:17:48.459245   679 action_processor.cc:73] ActionProcessor::ActionComplete: finished last action of type DownloadAction
update_engine[679]: I0809 19:17:48.459290   679 update_attempter.cc:290] Processing Done.
update_engine[679]: E0809 19:17:48.459367   679 update_attempter.cc:603] Update failed.
update_engine[679]: I0809 19:17:48.459416   679 payload_state.cc:97] Updating payload state for error code: 18 (kActionCodeDownloadPayloadPubKeyVerificationError)