No output as readme description for example

[weijinjinnihao]

${LLVM_DIR}/opt -S -passes="print-dpp-global" --dpp-rule="all" -disable-output < ${PWD}/dpp-data/example/example.opt
Data Pointer Prioritization Analysis
SVF Initialization Done, time taken = 0.01
Rule1 done...time taken = 0.00
Rule2 done...time taken = 0.00
Rule3 done...time taken = 0.00
Rule5 done...time taken = 0.00
Rule6 done...time taken = 0.00
Rule7 done...time taken = 0.00
Rule8 done...time taken = 0.00
Rule9 done...time taken = 0.00
Top k = 1
#################### SUMMARY: 1 data objects #########################

TOP-K = 1, Actual = 0
12(5) 0(0) 0(0) 0(0) - 0(0) 0(0) 0(0) 0(0) 0(0) 0(0)

where is wrong?