int checkedBlocks=0;
int invalidBlocks=0;
TableauMonitor monitor=m_tableau.getTableauMonitor();
if (monitor!=null)
monitor.blockingValidationStarted();
Node node;
node=m_lastValidatedUnchangedNode==null ? m_tableau.getFirstTableauNode() : m_lastValidatedUnchangedNode;
Node firstValidatedNode=node;
while (node!=null) {