Let x0 of type ι be given.

Let x1 of type ι → ι → ι be given.

Let x2 of type ι → ι → ι be given.

Let x3 of type ι → ι → ι be given.

Let x4 of type ι be given.

Let x5 of type ι → ι → ι be given.

Let x6 of type ι → ι → ι → ι be given.

Let x7 of type ι → ι → ι be given.

Let x8 of type ι → ι → ι → ι be given.

Let x9 of type ι → ι → ι → ι be given.

Let x10 of type ι → ι → ι be given.

Let x11 of type ι → ι → ι be given.

Let x12 of type ι → ι → ι be given.

Let x13 of type ι → ι → ι be given.

Assume H0: Loop_with_defs_cex1 x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 x10 x11 x12 x13.

Assume H1: In x4 x0.

Assume H2: ∀ x14 . In x14 x0 ⟶ ∀ x15 . In x15 x0 ⟶ ∀ x16 . In x16 x0 ⟶ x9 x14 x15 (x7 x14 (x10 x15 (x9 x14 x15 (x7 x14 (x10 x15 (x9 x14 x15 (x7 x14 (x10 x15 x16)))))))) = x16.

Assume H3: ∀ x14 . In x14 x0 ⟶ ∀ x15 . In x15 x0 ⟶ ∀ x16 . In x16 x0 ⟶ ∀ x17 . In x17 x0 ⟶ x9 x14 x15 (x13 x16 (x10 x14 (x8 x15 x16 (x9 x14 x15 (x13 x16 (x10 x14 (x8 x15 x16 x17))))))) = x17.

Assume H4: ∀ x14 . In x14 x0 ⟶ ∀ x15 . In x15 x0 ⟶ ∀ x16 . In x16 x0 ⟶ ∀ x17 . In x17 x0 ⟶ x13 x14 (x7 x15 (x12 x16 x17)) = x7 x15 (x12 x16 (x13 x14 x17)).

Assume H5: ∀ x14 . In x14 x0 ⟶ ∀ x15 . In x15 x0 ⟶ ∀ x16 . In x16 x0 ⟶ ∀ x17 . In x17 x0 ⟶ ∀ x18 . In x18 x0 ⟶ x9 x14 x15 (x7 x16 (x7 x17 x18)) = x7 x16 (x7 x17 (x9 x14 x15 x18)).

Assume H6: ∀ x14 . In x14 x0 ⟶ ∀ x15 . In x15 x0 ⟶ ∀ x16 . In x16 x0 ⟶ ∀ x17 . In x17 x0 ⟶ ∀ x18 . In x18 x0 ⟶ x7 x14 (x12 x15 (x13 x16 (x10 x17 x18))) = x13 x16 (x10 x17 (x7 x14 (x12 x15 x18))).

Assume H7: ∀ x14 . In x14 x0 ⟶ ∀ x15 . In x15 x0 ⟶ ∀ x16 . In x16 x0 ⟶ ∀ x17 . In x17 x0 ⟶ ∀ x18 . In x18 x0 ⟶ x10 x14 (x10 x15 (x12 x16 (x7 x17 x18))) = x12 x16 (x7 x17 (x10 x14 (x10 x15 x18))).

Assume H8: ∀ x14 . ... ⟶ ∀ x15 . ... ⟶ ∀ x16 . ... ⟶ ∀ x17 . ... ⟶ ∀ x18 . ....

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Proofgold Proof