Capture shortdump

Please help me.

My source code is bolow.

DATA: l_amt TYPE komv-kbetr,

l_amt1(16) TYPE p DECIMALS 2,

g_amt TYPE komv-kbetr,

g_amt1(16) TYPE p DECIMALS 2.

CATCH SYSTEM-EXCEPTIONS arithmetic_errors = 5.

l_amt = l_amt1 + '123456.12' * 10.

g_amt = g_amt1 + '123456789.12' * 10.

ENDCATCH.

IF sy-subrc EQ 5.

message s000(38) 'OverFlow'.

ENDIF.

How do I know which line is shortdump? Which function module or Method to identify?

Thank you.