anchor.diff:  COPY pa2checker pa2checker
   COPY simprog simprog
   
  -RUN mkdir results
  +RUN mkdir -p /persist/integration/corpus
  +RUN mkdir -p /persist/integration/results
  +RUN touch /persist/integration/corpus.json
  +
  +RUN ln -s /persist/integration/corpus $INTEGRATION_DIR/corpus
  +RUN ln -s /persist/integration/corpus.json $INTEGRATION_DIR/corpus.json
  +RUN ln -s /persist/integration/results $INTEGRATION_DIR/results
  +RUN rm -rf /persist/integration/
   
   CMD ["bash"]
   
  
positive.code: RUN mkdir $INTEGRATION_DIR
  WORKDIR $INTEGRATION_DIR
  
  
  COPY fetch_dependencies.sh build_daikon.sh ./
  RUN bash fetch_dependencies.sh 1
  
  RUN mkdir corpus
  COPY corpus.json corpus.json
  
  COPY *.py ./
  COPY *.sh ./
  
negative.code:     vim \
      ruby1.9
  
  COPY requirements.txt /tmp/
  RUN pip install -r /tmp/requirements.txt
  
  