michael@lnx-main:working> grep Detected regex.ato
whilem: Detected a super-linear match, switching on caching...
michael@lnx-main:working> grep Detected regex.pos
whilem: Detected a super-linear match, switching on caching...
# Now look for this line
# whilem: (cache) already tried at this position...
michael@lnx-main:working> grep '(cache)' regex.ato | wc
    298    2086   26426
michael@lnx-main:working> grep '(cache)' regex.pos | wc
      0       0       0