SPASS is incomplete because of the -Splits and -FullRed options, not just because of -SOS=1 -- don't pretend the opposite

--- a/src/HOL/Tools/ATP/atp_systems.ML	Wed Dec 14 18:07:32 2011 +0100
+++ b/src/HOL/Tools/ATP/atp_systems.ML	Wed Dec 14 18:07:32 2011 +0100
@@ -339,8 +339,8 @@
                        sosN))),
       (0.333, (false, (300, DFG DFG_Unsorted, "poly_tags??", lam_liftingN,
                        sosN))),
-      (0.334, (true, (50, DFG DFG_Unsorted, "mono_tags??", lam_liftingN,
-                      no_sosN)))]
+      (0.334, (false, (50, DFG DFG_Unsorted, "mono_tags??", lam_liftingN,
+                       no_sosN)))]
      |> (if Config.get ctxt force_sos then hd #> apfst (K 1.0) #> single
          else I)}