strncat.c:4:21: Possible out-of-bounds store:
      strncat(buffer, str, sizeof((buffer)) - 1);
  Unable to resolve constraint:
    requires maxRead (buffer @ strncat.c:4:29)  <= 0
  needed to satisfy precondition:
    requires maxSet (buffer @ strncat.c:4:29)
                >= maxRead (buffer @ strncat.c:4:29) + 255
  derived from strncat precondition:
    requires maxSet (<parameter 1>)
                >=  maxRead (<parameter1>) + <parameter 3>