s.usednum_before = getNodeNum(); s.time = System.currentTimeMillis();
    protected void bdd_default_reohandler(boolean prestate, ReorderStats s) {        int verbose = 1;        if (verbose > 0) {            if (prestate) {                System.out.println("Start reordering");                s.usednum_before = getNodeNum();                s.time = System.currentTimeMillis();            } else {                s.time = System.currentTimeMillis() - s.time;                s.usednum_after = getNodeNum();                System.out.println("End reordering. "+s);            }        }    }