Funding for this research was provided by:
National Natural Science Foundation of China (No. 61272166)
State Key Laboratory of Software Development Environment of China (No. SKLSDE-2016ZX-08)
Huawei Research Fund (No. HIRPO-20140405-YB2015080015)
Article History
Received: 26 February 2018
Revised: 13 March 2018
Accepted: 14 March 2018
First Online: 26 March 2018