In what sense would you say that the hypothesis has the above been "tested"? It would not have thought that mathematics qualifies as a form of testing given that it is not based on direct observation but relies on inference. hence, it could not be said to be objectively true because it relies on assumptions put into the models. (i.e. whilst 2+2=4 that's not the same as "4" representing a physical state or observation because numbers are so abstract. there is therefore considerable room for error in how a phenomena can be quantified).
I would say that the hypothesis in the OP has only been very weakly tested, at best. The problem, as you say, is that the computer simulations don't accurately show the complexity of the chemical reactions involved, they don't have a good definition of 'life' in this context (high complexity isn't th same as life), and we simply do not know what sort of chemistry is *required* for life.