Hello,

The used software is most likely LTSpice:
http://www.linear.com/designtools/software/#LTspice

If you are looking for electronics software, have a look at this EDUCYPEDIA page:
http://educypedia.karadimov.info/electronics/easoftsim.htm

Bertus

 

I think the base emitter junction will breakdown on the pnp transistor. I don't know why spice doesn't put a zener or something there so it would be easy to see.