int index = (int) Math.floor(rand);
String path = allPaths.get(index);
if (testSession.itemExists(path)) {
Item item = testSession.getItem(path);
Visitor visitor = new Visitor();
item.accept(visitor);
nodeCnt += visitor.nodeCnt;
propertyCnt += visitor.propertyCnt;
} else {
noAccess++;
}