consider k being Element of NAT such that
A2: ( IC (Comput (ProgramPart (s +* (P +* (Start-At 0 ,SCM+FSA )))),(s +* (P +* (Start-At 0 ,SCM+FSA ))),k) = card (ProgramPart P) & ( for n being Element of NAT st n < k holds
IC (Comput (ProgramPart (s +* (P +* (Start-At 0 ,SCM+FSA )))),(s +* (P +* (Start-At 0 ,SCM+FSA ))),n) in dom P ) ) by A1, Def3;
take k ; :: thesis: ( IC (Comput (ProgramPart (s +* (P +* (Start-At 0 ,SCM+FSA )))),(s +* (P +* (Start-At 0 ,SCM+FSA ))),k) = card (ProgramPart P) & ( for n being Element of NAT st not IC (Comput (ProgramPart (s +* (P +* (Start-At 0 ,SCM+FSA )))),(s +* (P +* (Start-At 0 ,SCM+FSA ))),n) in dom P holds
k <= n ) )
thus ( IC (Comput (ProgramPart (s +* (P +* (Start-At 0 ,SCM+FSA )))),(s +* (P +* (Start-At 0 ,SCM+FSA ))),k) = card (ProgramPart P) & ( for n being Element of NAT st not IC (Comput (ProgramPart (s +* (P +* (Start-At 0 ,SCM+FSA )))),(s +* (P +* (Start-At 0 ,SCM+FSA ))),n) in dom P holds
k <= n ) ) by A2; :: thesis: verum