int z = change(dsg, id, i) ;
pause(maxpause) ;
int x2 = count("SELECT * { ?s ?p ?o }", dsg) ;
if ( x1+z != x2 )
{
TransactionManager txnMgr = dsg.getTransaction().getTxnMgr() ;
SysTxnState state = txnMgr.state() ;
String label = dsg.getTransaction().getLabel() ;
log.warn(format("WRITER: %s Change seen: %d + %d != %d : id=%d: i=%d", label, x1, z, x2, id, i)) ;
log.warn(state.toString()) ;
dsg.abort() ;
dsg.end() ;