A Survey of Automatic Software Vulnerability Detection, Program Repair, and Defect Prediction Techniques

Table 4

Technical characteristics of semantic-based clone detection.

System/writer	Preprocessing	Representation	Network	Clone types	Classification object
CCDLC [13]	Trimme, normalize method blocks	BDG PDG AST	CNN	T3-T4	Method blocks
Sheneamer et al. [14]	Trimme, nirmalize method blocks	AST PDG BDG	—	T1–T4	Method blocks
ZEEK [15]	Split the procedure to basic blocks	Hashes	NN	T4	Code block
DeepSim [16]	Use WALA to analysis bytecode	DFG CFG	DNN′	T4	Method level