Segmentation fault (core dumped) for atuo TVM with tensorflow model

I use auto tvm to tune my pre-train tensorflow model, i do it step by step like tutorials[ Auto-tuning a convolutional network for x86 CPU] ,after step tune_graph it get a Segmentation fault (core dumped) error without any other log message, so i don’t konw what happen. my codel and pb is here

anyone can help me? thx very much.