Oracle instance terminated immediate after instance startup due to following mentioned oracle error:

Cause:
A mismatch has been detected between Redo records and rollback (Undo) records.
We are validating the Undo record number relating to the change being applied against the maximum undo record number recorded in the undo block. This error is reported when the validation fails. This error may indicate a rollback segment corruption.
Note: This may require a recovery from a database backup depending on the situation.

Adrci logs are as follows:

Errors in file /u01/app/oracle/diag/rdbms/db1/db1/trace/db1_smon_11168.trc (incident=1014790):
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
replication_dependency_tracking turned off (no async multimaster replication found)
Incident details in: /u01/app/oracle/diag/rdbms/db1/db1/incident/incdir_1014790/db1_smon_11168_i1014790.trc
2016-06-30 11:13:35.355000 +05:30
Starting background process QMNC
QMNC started with pid=25, OS id=11249
ARC3: Archival started
ARC0: STARTING ARCH PROCESSES COMPLETE
Completed: ALTER DATABASE OPEN
2016-06-30 11:13:36.558000 +05:30
db_recovery_file_dest_size of 163840 MB is 1.12% used. This is a
user-specified limit on the amount of space that will be used by this
database for recovery-related files, and does not reflect the amount of
space available in the underlying filesystem or ASM diskgroup.
Doing block recovery for file 3 block 26014
Resuming block recovery (PMON) for file 3 block 26014
Block recovery from logseq 13618, block 56 to scn 3980712372
Recovery of Online Redo Log: Thread 1 Group 1 Seq 13618 Reading mem 0
 Mem# 0: /u02/oradata/db1/redo_1_1.log
 Mem# 1: /u02/oradata/db1/redo_1_2.log
 Mem# 2: /u02/oradata/db1/redo_1_3.log
Block recovery stopped at EOT rba 13618.106.16
Block recovery completed at rba 13618.106.16, scn 0.3980712368
Doing block recovery for file 3 block 160
Resuming block recovery (PMON) for file 3 block 160
Block recovery from logseq 13618, block 56 to scn 3980712329
Recovery of Online Redo Log: Thread 1 Group 1 Seq 13618 Reading mem 0
 Mem# 0: /u02/oradata/db1/redo_1_1.log
 Mem# 1: /u02/oradata/db1/redo_1_2.log
 Mem# 2: /u02/oradata/db1/redo_1_3.log
Block recovery completed at rba 13618.59.16, scn 0.3980712330
Errors in file /u01/app/oracle/diag/rdbms/db1/db1/trace/db1_smon_11168.trc:
ORA-01595: error freeing extent (10) of rollback segment (3))
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
Starting background process SMCO
SMCO started with pid=29, OS id=11268
Trace dumping is performing id=[cdmp_20160630111337]
2016-06-30 11:13:37.819000 +05:30
Starting background process CJQ0
CJQ0 started with pid=28, OS id=11276
2016-06-30 11:13:41.579000 +05:30
Errors in file /u01/app/oracle/diag/rdbms/db1/db1/trace/db1_j001_11285.trc (incident=1014942):
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
Incident details in: /u01/app/oracle/diag/rdbms/db1/db1/incident/incdir_1014942/db1_j001_11285_i1014942.trc
Errors in file /u01/app/oracle/diag/rdbms/db1/db1/trace/db1_j004_11291.trc:
2016-06-30 11:13:43.111000 +05:30
Doing block recovery for file 3 block 26014
Resuming block recovery (PMON) for file 3 block 26014
Block recovery from logseq 13618, block 56 to scn 3980712372
Recovery of Online Redo Log: Thread 1 Group 1 Seq 13618 Reading mem 0
 Mem# 0: /u02/oradata/db1/redo_1_1.log
 Mem# 1: /u02/oradata/db1/redo_1_2.log
 Mem# 2: /u02/oradata/db1/redo_1_3.log
Block recovery completed at rba 13618.106.16, scn 0.3980712374
Errors in file /u01/app/oracle/diag/rdbms/db1/db1/trace/db1_j000_11283.trc (incident=1014934):
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
Incident details in: /u01/app/oracle/diag/rdbms/db1/db1/incident/incdir_1014934/db1_j000_11283_i1014934.trc
Trace dumping is performing id=[cdmp_20160630111343]
2016-06-30 11:13:45.937000 +05:30
Doing block recovery for file 3 block 26014
Resuming block recovery (PMON) for file 3 block 26014
Block recovery from logseq 13618, block 56 to scn 3980712372
Recovery of Online Redo Log: Thread 1 Group 1 Seq 13618 Reading mem 0
 Mem# 0: /u02/oradata/db1/redo_1_1.log
 Mem# 1: /u02/oradata/db1/redo_1_2.log
 Mem# 2: /u02/oradata/db1/redo_1_3.log
Block recovery completed at rba 13618.106.16, scn 0.3980712374
Errors in file /u01/app/oracle/diag/rdbms/db1/db1/trace/db1_j000_11283.trc:
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
Errors in file /u01/app/oracle/diag/rdbms/db1/db1/trace/db1_j001_11285.trc (incident=1014943):
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
Incident details in: /u01/app/oracle/diag/rdbms/db1/db1/incident/incdir_1014943/db1_j001_11285_i1014943.trc
2016-06-30 11:13:46.903000 +05:30
Trace dumping is performing id=[cdmp_20160630111346]
2016-06-30 11:13:48.279000 +05:30
Errors in file /u01/app/oracle/diag/rdbms/db1/db1/trace/db1_j001_11285.trc:
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
Trace dumping is performing id=[cdmp_20160630111349]
Incident details in: /u01/app/oracle/diag/rdbms/db1/db1/incident/incdir_1019488/db1_j001_11285_i1019488.trc
Errors in file /u01/app/oracle/diag/rdbms/db1/db1/incident/incdir_1019488/db1_j001_11285_i1019488.trc:
ORA-00603: ORACLE server session terminated by fatal error
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
Trace dumping is performing id=[cdmp_20160630111351]
2016-06-30 11:13:53.489000 +05:30
Doing block recovery for file 3 block 26014
Resuming block recovery (PMON) for file 3 block 26014
Block recovery from logseq 13618, block 56 to scn 3980712372
Recovery of Online Redo Log: Thread 1 Group 1 Seq 13618 Reading mem 0
 Mem# 0: /u02/oradata/db1/redo_1_1.log
 Mem# 1: /u02/oradata/db1/redo_1_2.log
 Mem# 2: /u02/oradata/db1/redo_1_3.log
Block recovery completed at rba 13618.106.16, scn 0.3980712374
Errors in file /u01/app/oracle/diag/rdbms/db1/db1/trace/db1_pmon_11144.trc (incident=1014702):
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
Incident details in: /u01/app/oracle/diag/rdbms/db1/db1/incident/incdir_1014702/db1_pmon_11144_i1014702.trc
2016-06-30 11:13:55.766000 +05:30
Errors in file /u01/app/oracle/diag/rdbms/db1/db1/trace/db1_pmon_11144.trc:
ORA-00600: internal error code, arguments: [4194], [], [], [], [], [], [], [], [], [], [], []
PMON (ospid: 11144): terminating the instance due to error 472
Instance terminated by PMON, pid = 11144

Workaround:
Startup database in mount mode:

SQL> startup mount;

Check current undo tablespace:

SQL> show parameter undo_tablespace;

Alter undo management to ‘MANUAL’:

SQL> alter system set undo_management='MANUAL' scope=spfile;

Bounce database to open mode, meanwhile please verify adrci logs, if there is problem.

SQL> shut immediate;
 SQL> startup;

Create new undo tablespace if everything is fine in adrci logs:

SQL> create undo tablespace newundotbs datafile '/u02/oradata/db1/newundotbs01.dbf' size 5G autoextend on next 300M maxsize 31G;

Change default undo tablespace to new one:

SQL> alter system set undo_tablespace='NEWUNDOTBS' scope=spfile;

Alter undo management to ‘AUTO’:

SQL> alter system set undo_management='AUTO' scope=spfile;

Bounce the database:

SQL> shut immediate;
SQL> startup;

Verify current undo tablespace:

SQL> show parameter undo_tablespace

done.

Thank you.
Stay Tune. 🙂