Prover fails to complete

[AdityaSenthilvel]

Facility PushDemo;
uses String_Theory;
Facility Integer_Stack_Fac is Stack_Template(Integer, 5)
realized by Array_Realiz;

Operation MyPush(preserves I: Integer; updates S: Stack);
  ensures (|#S| < 5 and S = <#I> o #S) or |#S| = 5 and S = #S;
Procedure
  Var J: Integer;
  J := I;
  If Depth(S) + 1 <= 5 then
    Push(J, S);
  end;
end;

Operation Main();
Procedure

end Main;

end;

Another example where the prover fails to complete:

[AdityaSenthilvel]

ClemsonRSRG#205 (comment)

[rhit-fosswe]

Out of scope for our team (at least for now). Original ticket is from November 5, 2015. It has been updated since then, but it does not seem like the issue is officially fixed, as it is now part of the complete prover refactor.