Comparing precision of original (left) with increment (right):
globals:	equal = 62	left = 0	right = 0	incomparable = 0
locals: 	equal = 3037	left = 0	right = 0	incomparable = 0
locals_ctx:	equal = 340	left = 0	right = 0	incomparable = 0	no_ctx_in_right = 4362

[Warning][Deadcode] Function "display_screen" will never be called: 35LoC (smtprc_comb.c:623:1)