 System minimization:
&cntrl
   imin=1, ntmin=1, nmropt=0, drms=0.1
   maxcyc=2000, ncyc=1500,
   ntx=1, irest=0,
   ntpr=100, ntwr=100, iwrap=0,
   ntf=1, ntb=1, cut=10.0, nsnb=20,
   igb=0,
   ibelly=0, ntr=0,
&end
