Table 5. Specific mutation operators.

Type	Operator	Description
Keyword	FSC FVC DLR VTR PKD DKD	Function State Keyword Change Function Visibility Keyword Change Data Location Keyword Replacement Variable Type Keyword Replacement Payable Keyword Deletion Delete Keyword Deletion
Global Variable and Function	GVC MFR AVR	Global Variable Change Mathematical Functions Replacement Address Variable Replacement
Variable Unit	EUR TUE	Ether Unit Replacement Time Unit Replacement
Error Handling	RSD RSC ASD ASC	Require Statement Deletion Require Statement Change Assert Statement Deletion Assert Statement Change