Sudden and dramatic drop in time increment

[soildynamics]

As you can see below, the time increment in my NLG plastic Consolidation analysis (Transient Soil Step) drops dramatically and suddenly by almost 5 orders. Is that material failure? . What can i doif my analysis time span is in the order of 1E+08, while the time increment after that moments seems to continue with order of 1.
This means that I need several days to complete a single analysis, if the job doesnot abort. Please advise
3 7.94706e+07 1.94706e+07 4696.5
8 7.9471e+07 1.9471e+07 440.297
7 7.94711e+07 1.94711e+07 110.074
3 7.94711e+07 1.94711e+07 27.5186
4 7.94712e+07 1.94712e+07 27.5186
1 7.94712e+07 1.94712e+07 0.644967
1 7.94712e+07 1.94712e+07 1.28993
3 7.94712e+07 1.94712e+07 2.57987
2 7.94712e+07 1.94712e+07 0.96745

 

[soildynamics]

I have explored that this is due to the soft material that experiencing huge distortion. Please refer to my following thread Convergence of plastic soft materials
for further comments