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diff --git a/matita/tests/TPTP/Veloci/SYN083-1.p.ma b/matita/tests/TPTP/Veloci/SYN083-1.p.ma
new file mode 100644
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+++ b/matita/tests/TPTP/Veloci/SYN083-1.p.ma
@@ -0,0 +1,38 @@
+
+include "logic/equality.ma".
+(* Inclusion of: SYN083-1.p *)
+(* -------------------------------------------------------------------------- *)
+(*  File     : SYN083-1 : TPTP v3.1.1. Released v1.0.0. *)
+(*  Domain   : Syntactic *)
+(*  Problem  : Pelletier Problem 61 *)
+(*  Version  : Especial. *)
+(*  English  :  *)
+(*  Refs     : [Pel86] Pelletier (1986), Seventy-five Problems for Testing Au *)
+(*  Source   : [Pel86] *)
+(*  Names    : Pelletier 61 [Pel86] *)
+(*  Status   : Unsatisfiable *)
+(*  Rating   : 0.00 v2.0.0 *)
+(*  Syntax   : Number of clauses     :    2 (   0 non-Horn;   2 unit;   1 RR) *)
+(*             Number of atoms       :    2 (   2 equality) *)
+(*             Maximal clause size   :    1 (   1 average) *)
+(*             Number of predicates  :    1 (   0 propositional; 2-2 arity) *)
+(*             Number of functors    :    5 (   4 constant; 0-2 arity) *)
+(*             Number of variables   :    3 (   0 singleton) *)
+(*             Maximal term depth    :    4 (   4 average) *)
+(*  Comments :  *)
+(* -------------------------------------------------------------------------- *)
+theorem prove_this:
+ \forall Univ:Set.
+\forall a:Univ.
+\forall b:Univ.
+\forall c:Univ.
+\forall d:Univ.
+\forall f:\forall _:Univ.\forall _:Univ.Univ.
+\forall H0:\forall X:Univ.\forall Y:Univ.\forall Z:Univ.eq Univ (f X (f Y Z)) (f (f X Y) Z).eq Univ (f a (f b (f c d))) (f (f (f a b) c) d)
+.
+intros.
+autobatch paramodulation timeout=100;
+try assumption.
+print proofterm.
+qed.
+(* -------------------------------------------------------------------------- *)