st.setLength(0);
st.append("-- " + j + " ------------------------------------------------------------------------------------\n");
for (int i = 0; i < nbIt; i++) {
Solver rand = modeler(n);
PropagationEngineFactory.values()[j].make(rand);
rand.findAllSolutions();
st.append(StringUtils.pad(String.format("%.3f ", rand.getMeasures().getInitialPropagationTimeCount()), -7, " "));
times[i] = rand.getMeasures().getInitialPropagationTimeCount();
st.append(StringUtils.pad(String.format("%d ", rand.getMeasures().getNodeCount()), -7, " "));
st.append(StringUtils.pad(String.format("%d ", rand.getMeasures().getBackTrackCount()), -7, " "));
log.info(st.toString());