Question: Here is the reasoning... If universe is infinite and time is infinite, then there has to be an instance where our life is 100% simulated (in some computer and such). And there has to be an instance of that simulation where simulation will ensure when a person die it will transferred to "after life".

So if universe infinite and time is infinite, then after life does exist. How yo disproof this? Which author did extensive work on this subject?

EDIT: Maybe the question can be put like this: if we live in "simulated" world inside infinite (space and time) universe then after-life must exists.

Answer: 
I think that doesn't follow. For consider the following.

You can have an infinitely long number sequence, that is constructed like this: 1, 11, 111, 1111, 11111, ...

No '2' ever occurs in this sequence. Likewise, not everything possible must occur if universe and time are both infinite. It might just be that something like an after-life is like the '2' in the sequence form above.
Well here's the thing: You assume "universe" is both the physical universe and a simulation thereof at the same time. You have to pick one. For example, if you are in a simulation you really need to apply computer science, which is all finite with the exception of a Turing Machine. If you are in the "physical" universe, you have to solve the metaphysical question of why physical law is universal, which on it's face appears to imply a finite space. There isn't even the slightest reason to make physical law universal inside an engineered simulation, in fact this is what you imply.

So basically you are discussing "physical law", which (from Contemporary Debates in the Philosophy of Science, 2004, Christopher Hitchcock, editor) section 0.2.3, where "law" implies regularity, which, again, is what you seek to undermine. There is no accepted evidence for non-regularity.