- Singular variables need to be bound as well (to ensure ordering is

correct w.r.t. e.g. nonces, if the intruder cannot construct them.)

src/arachne.c

@@ -897,12 +897,6 @@ select_goal ()
 
       b = (Binding) bl->data;
       if (!b->done)
-	{
-	  // We don't care about singular variables.
-	  /**
-	   * Note that to mirror the modelchecker semantics, we should check whether the type exists in M_0.
-	   */
-	  if (!isTermVariable (b->term))
 	{
 	  float cons;
 
@@ -930,7 +924,6 @@ select_goal ()
 	      eprintf ("[%i]", b->level);
 	    }
 	}
-	}
       bl = bl->next;
     }
   if (sys->output == PROOF)