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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_hju3sv02j157e56r078serrbev, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
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<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
static Collection<S> ai_gc_unreachedWords() {
  Set<S> unreached = caseInsensitiveSet();
  
  for (S term : indexedTerms())
    for (WebNode node : indexedNodes(term)) {
      S text = web_text(node);
      continue if unreached.contains(text);
      S d = ai_text(text, "has GC distance", "$X");
      if (d == null)
        unreached.add(text);
    }
    
  ret unreached;
}