able only if (modulo soundness bugs) every call made by the original subroutine is made by the modified one, given equal variables on input.</p></div></div><div class="odoc-spec"><div class="spec value" id="val-compare_subs_smtlib" class="anchored"><a href="#val-compare_subs_smtlib" class="anchor"></a><code><span><span class="keyword">val</span> compare_subs_smtlib : 
  <span>smtlib_post:string <span class="arrow">&#45;&gt;</span></span>
  <span>smtlib_hyp:string <span class="arrow">&#45;&gt;</span></span>
