After I ran the command "python script/repair.py jGenProg --benchmark Defects4j --id chart-1",I go to the working_directory and want to modify the test cases in the folder named jGenProg_Defects4j_chart_1.However,the folder is disappear or being deleted,only the outcome left in "results".So I want to retain the " jGenProg_Defects4j_chart_1"folder and re-run this bug when test are modified,How can I do for it?