diff -r 35a2ac83a262 -r 0c8a9c028304 src/HOL/Tools/Sledgehammer/sledgehammer_prover_atp.ML
--- a/src/HOL/Tools/Sledgehammer/sledgehammer_prover_atp.ML	Tue Jun 09 12:13:15 2020 +0100
+++ b/src/HOL/Tools/Sledgehammer/sledgehammer_prover_atp.ML	Wed Jun 10 15:55:41 2020 +0200
@@ -362,8 +362,8 @@
           val needs_full_types = is_typed_helper_used_in_atp_proof atp_proof
           val preferred_methss =
             (Metis_Method (NONE, NONE),
-             bunches_of_proof_methods try0 (smt_proofs <> SOME false) needs_full_types
-               (if atp_proof_prefers_lifting atp_proof then liftingN else hide_lamsN))
+             bunches_of_proof_methods try0 smt_proofs needs_full_types
+              (if atp_proof_prefers_lifting atp_proof then liftingN else hide_lamsN))
         in
           (used_facts, preferred_methss,
            fn preplay =>