Database Upgrade Failed with Error "ORA-19809: limit exceeded for recovery files"

Upgrade failed with error "ORA-19809: limit exceeded for recovery files" during the post upgrade steps.

Below is the message from alert log.

ORA-19815: WARNING: db_recovery_file_dest_size of 4385144832 bytes is 100.00% used, and has 0 remaining bytes available.
Wed Aug 29 22:48:43 2017
************************************************************************
You have following choices to free up space from recovery area:
1. Consider changing RMAN RETENTION POLICY. If you are using Data Guard,
then consider changing RMAN ARCHIVELOG DELETION POLICY.
2. Back up files to tertiary device such as tape using RMAN
BACKUP RECOVERY AREA command.
3. Add disk space and increase db_recovery_file_dest_size parameter to
reflect the new space.
4. Delete unnecessary files using RMAN DELETE command. If an operating
system command was used to delete files, then use RMAN CROSSCHECK and
DELETE EXPIRED commands.
************************************************************************

Use the below to find FRA usage.

col name format a32
col size_mb format 999,999,999
col used_mb format 999,999,999
col pct_used format 999

select
name,
ceil( space_limit / 1024 / 1024) size_mb,
ceil( space_used / 1024 / 1024) used_mb,
decode( nvl( space_used, 0),0, 0,
ceil ( ( space_used / space_limit) * 100) ) pct_used
from
v$recovery_file_dest
order by
name desc;

Create free space at location "db_recovery_file_dest_size" and retry the post upgrade steps manually.