Goal:
  
  A : Type
  P : list A → A → Type
  Q : list A → list A → A → A → Type
  Γ : list A
  d : A
  Γ0 : list A
  X : All_fold P Γ0
  p : P Γ0 d
  IHX : ∀ Γ : list A,
          All2_fold Q Γ Γ0
          → All2_fold (λ (Γ0 Γ' : list A) (d d' : A), P Γ' d' × Q Γ0 Γ' d d')
              Γ Γ0
  H1' : list A
  H1 : list A
  H : All2_fold Q H1' H1
  ============================
   ({| pr1 := Γ; pr2 := d :: Γ0 |} = {| pr1 := H1'; pr2 := H1 |}
    → let H := CoreTactics.block in
      let H0 := CoreTactics.block in
      All2_fold (λ (Γ Γ' : list A) (d d' : A), P Γ' d' × Q Γ Γ' d d') Γ
        (d :: Γ0))


DEBUG:Going to execute:
destruct p || (case p; clear p)
Level 4: evaluation of term
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2_fold Q H1' H1)"
in
environment:
A : Type
P : list A → A → Type
Q : list A → list A → A → A → Type
Γ : list A
d : A
Γ0 : list A
X : All_fold P Γ0
p : P Γ0 d
IHX : ∀ Γ : list A,
        All2_fold Q Γ Γ0
        → All2_fold (λ (Γ0 Γ' : list A) (d d' : A), P Γ' d' × Q Γ0 Γ' d d') Γ
            Γ0
H1', H1 : list A
H : All2_fold Q H1' H1


Level 3: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2_fold Q H1' H1)"
in
environment:
A : Type
P : list A → A → Type
Q : list A → list A → A → A → Type
Γ : list A
d : A
Γ0 : list A
X : All_fold P Γ0
p : P Γ0 d
IHX : ∀ Γ : list A,
        All2_fold Q Γ Γ0
        → All2_fold (λ (Γ0 Γ' : list A) (d d' : A), P Γ' d' × Q Γ0 Γ' d d') Γ
            Γ0
H1', H1 : list A
H : All2_fold Q H1' H1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2_fold Q H1' H1)"
in
environment:
A : Type
P : list A → A → Type
Q : list A → list A → A → A → Type
Γ : list A
d : A
Γ0 : list A
X : All_fold P Γ0
p : P Γ0 d
IHX : ∀ Γ : list A,
        All2_fold Q Γ Γ0
        → All2_fold (λ (Γ0 Γ' : list A) (d d' : A), P Γ' d' × Q Γ0 Γ' d d') Γ
            Γ0
H1', H1 : list A
H : All2_fold Q H1' H1

Level 2: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2_fold Q H1' H1)"
in
environment:
A : Type
P : list A → A → Type
Q : list A → list A → A → A → Type
Γ : list A
d : A
Γ0 : list A
X : All_fold P Γ0
p : P Γ0 d
IHX : ∀ Γ : list A,
        All2_fold Q Γ Γ0
        → All2_fold (λ (Γ0 Γ' : list A) (d d' : A), P Γ' d' × Q Γ0 Γ' d d') Γ
            Γ0
H1', H1 : list A
H : All2_fold Q H1' H1


Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2_fold Q H1' H1)"
in
environment:
A : Type
P : list A → A → Type
Q : list A → list A → A → A → Type
Γ : list A
d : A
Γ0 : list A
X : All_fold P Γ0
p : P Γ0 d
IHX : ∀ Γ : list A,
        All2_fold Q Γ Γ0
        → All2_fold (λ (Γ0 Γ' : list A) (d d' : A), P Γ' d' × Q Γ0 Γ' d d') Γ
            Γ0
H1', H1 : list A
H : All2_fold Q H1' H1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2_fold Q H1' H1)"
in
environment:
A : Type
P : list A → A → Type
Q : list A → list A → A → A → Type
Γ : list A
d : A
Γ0 : list A
X : All_fold P Γ0
p : P Γ0 d
IHX : ∀ Γ : list A,
        All2_fold Q Γ Γ0
        → All2_fold (λ (Γ0 Γ' : list A) (d d' : A), P Γ' d' × Q Γ0 Γ' d d') Γ
            Γ0
H1', H1 : list A
H : All2_fold Q H1' H1

Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2_fold Q H1' H1)"
in
environment:
A : Type
P : list A → A → Type
Q : list A → list A → A → A → Type
Γ : list A
d : A
Γ0 : list A
X : All_fold P Γ0
p : P Γ0 d
IHX : ∀ Γ : list A,
        All2_fold Q Γ Γ0
        → All2_fold (λ (Γ0 Γ' : list A) (d d' : A), P Γ' d' × Q Γ0 Γ' d d') Γ
            Γ0
H1', H1 : list A
H : All2_fold Q H1' H1

Level 1: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2_fold Q H1' H1)"
in
environment:
A : Type
P : list A → A → Type
Q : list A → list A → A → A → Type
Γ : list A
d : A
Γ0 : list A
X : All_fold P Γ0
p : P Γ0 d
IHX : ∀ Γ : list A,
        All2_fold Q Γ Γ0
        → All2_fold (λ (Γ0 Γ' : list A) (d d' : A), P Γ' d' × Q Γ0 Γ' d d') Γ
            Γ0
H1', H1 : list A
H : All2_fold Q H1' H1


Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2_fold Q H1' H1)"
in
environment:
A : Type
P : list A → A → Type
Q : list A → list A → A → A → Type
Γ : list A
d : A
Γ0 : list A
X : All_fold P Γ0
p : P Γ0 d
IHX : ∀ Γ : list A,
        All2_fold Q Γ Γ0
        → All2_fold (λ (Γ0 Γ' : list A) (d d' : A), P Γ' d' × Q Γ0 Γ' d d') Γ
            Γ0
H1', H1 : list A
H : All2_fold Q H1' H1

Level 0: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2_fold Q H1' H1)"
in
environment:
A : Type
P : list A → A → Type
Q : list A → list A → A → A → Type
Γ : list A
d : A
Γ0 : list A
X : All_fold P Γ0
p : P Γ0 d
IHX : ∀ Γ : list A,
        All2_fold Q Γ Γ0
        → All2_fold (λ (Γ0 Γ' : list A) (d d' : A), P Γ' d' × Q Γ0 Γ' d d') Γ
            Γ0
H1', H1 : list A
H : All2_fold Q H1' H1