If you believe that you are living in an interregnum because you have proclaimed Francis an apostate, then you are a sedevacantist. Deal with it.
When there is no legitimate pope, there is an interregnum.
You STILL answer no questions. There just MUST be a reason why you are too embarrassed to defend your remarkable fantasies.
Also, when Pius XII had died and before Roncalli was elected, when Roncalli had died and Montini had not been elected, when Montini died and Pope John Paul I had not been elected, and all similar circumstances in history, there were interregnums. In the modern context, sedevacantism seems attached to the claims that the late and usually admirable Giussepe Cardinal Siri was once or twice (1958 and/or 1963) elected as Gregory XVII but somehow "prevented" from serving. Nonetheless, he participated as a cardinal at the conclaves of 1978 that elected Pope John Paul I and Pope Saint John Paul II suggesting that Siri did not agree with the "Siri thesis."
That sort of sedevacantism leads to the idjit notion that we can never again elect a pope since all cardinals appointed by Pius XII and his predecessors are now either dead or so old that they don't know they are alive. That cannot the meaning of Jesus Christ's promise to be with His Church to the end of the world. Nor does it mean that the archschismatic Fellay is the REAL pope or Clarence Kelly or Joseph Santay or one of the Thuc line of illicit bishops whoever leads whatever cult you belong to (assuming that you are using Pius V because of Quo Primum or because of the Society of St. Pius V or some similar group of renegades).