*heading
 First order element test with elements falling off
*preprint, model=yes,history=yes,contact=yes
*node
*node,nset=top
*ngen,nset=basebot
*ngen,nset=basetop
*ngen,nset=sliderbot
*ngen,nset=slidertop
*nfill,nset=base
basebot,basetop,5,100
*nfill,nset=slider
sliderbot,slidertop,4,100
*element,type=cpe4h
*elgen,elset=base
*elgen,elset=slider
*elset,elset=basetop,generate
*elset,elset=sliderbot,generate
*solid section,elset=base,material=stiff
*solid section,elset=slider,material=stiff
*material,name=stiff
*hyperelastic,neo
100,.01
*surface,name=basetop
basetop,s3
*surface,name=sliderbot
sliderbot,s1
*contact pair,type=surface,interaction=contact
sliderbot,basetop
*surface interaction,name=contact
*mpc
beam,slidertop,top
*boundary
basebot,encastre
*step, nlgeom
*static
1,1
*boundary
top,1,1
top,6,6
*cload
top,2,-100.
*contact controls, stiff=0.01
*node print,nset=top
u,rf
*output,field,variable=PRESELECT
*end step
*step,unsymm=yes,inc=1000
*static
1.,375.,,1.
*boundary
top,1,1,7.5
*output,field,variable=PRESELECT
*print,contact=yes
*end step