\begin{tabbing}
(\=(((((MoveToConcl 1) \+
\\[0ex]CollapseTHEN (Fold `not` 0))$\cdot$) 
\\[0ex]CollapseTHEN (
\-\\[0ex]B\=Lemma `btrue\_neq\_bfalse`))$\cdot$) \+
\\[0ex]CollapseTHEN ((Auto\_aux (first\_nat 1:n) ((first\_nat 1:n
\-\\[0ex]),(first\_nat 1000:n)) (first\_tok :t) inil\_term)))$\cdot$
\end{tabbing}