If i undrstood your situation correctly, and AFAIK
, Citizenship application can be lodged after 4/5 years stay as PR
... not just after 1/2 years. As you are given PR
on 2012, you are suppose to stay as PR
for 4 years if the condition says so.
In that case, if you crossed the max 12 months limit of that 48 months ... my guess would be, they may ask you some other requirements to fulfill or may simply say wait for 6/7 more months after your 4 year ends in 2016.