Fabricio, I made one change to that attached model, I changed the sign on the Pressure, since you want the load to be downward, which is a positive pressure on the top faces. I cleared the mesh, remeshed and solved.

It converged in 78 iterations.

I recommend you change step 1 initial substeps to be 10 instead of 5 to eliminate all those wasted iterations in step 1 that resulted in a bisection.