SQL Server does not start

SQL Server does not start On an experimental system, we attempted to create an issue. The issue is that SQL Server does not start. We stopped SQL Server and renamed model database’s data and log files. The result was this in error log file (C:\Program Files\Microsoft SQL Server\MSSQL11.MSSQLSERVER\MSSQL\Log\ERRORLOG). 2013-09-08 16:50:06.10 spid4s Starting up database ‘msdb’. […]