Solution : https://service.sap.com/sap/support/notes/661417 (SAP Service marketplace login required)
Key words : 
phase  updstatdb_ind_inf    /sapmnt/<sid>/exe/sapdba, /usr/sap/<sid>/sys/exe/run, /swcenter-3pmain -> informix -> sapdba -> <operating system> 8, 3x 46d 46crdbms ids 7, /instguides --> sap basis --> release 4, open shared object file, 6d sr1 sap apo 3, 0a sr3 sap apo 3, 1c sap ebp / crm 2, corrected database version immediately
Related Notes : 
       
| 731676 | Inst. SAP Systems with EXT Kernel on Win/Informix 930, 9.40 | 
| 731295 | Inst. SAP Systems with EXT Kernel on UNIX/Informix 9.30 9.40 | 
| 601858 | RETRO-INF930: SAP 4.6C/D with Informix 930 | 
| 588946 | Sporadic endless runtimes, hanging processes | 
| 407317 | Released operating systems for SAP kernel 6.x INFORMIX | 
| 156549 | Released operating systems for SAP kernel 4.6x INFORMIX | 
| 85840 | Released operating systems SAP Kernel 4.0x/4.5x INFORMIX | 
| 23872 | SAP Kernel 3.0x/3.1x INFORMIX: Released operating systems | 
| 19466 | Downloading SAP kernel patches |