Goal:
  
  A : Type
  P : list A → A → Type
  Q : list A → list A → A → A → Type
  Γ' : list A
  d : A
  Γ : list A
  X : All_fold P Γ
  p : P Γ d
  IHX : ∀ Γ' : list A,
          All2_fold Q Γ Γ'
          → All2_fold (λ (Γ Γ'0 : list A) (d d' : A), P Γ d × Q Γ Γ'0 d d') Γ
              Γ'
  H1' : list A
  H1 : list A
  H : All2_fold Q H1' H1
  ============================
   ({| pr1 := d :: Γ; pr2 := Γ' |} = {| 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') 
        (d :: Γ) Γ')


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
Γ : list A
X : All_fold P Γ
p : P Γ d
IHX : ∀ Γ' : list A,
        All2_fold Q Γ Γ'
        → All2_fold (λ (Γ Γ'0 : list A) (d d' : A), P Γ d × Q Γ Γ'0 d d') Γ
            Γ'
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
Γ : list A
X : All_fold P Γ
p : P Γ d
IHX : ∀ Γ' : list A,
        All2_fold Q Γ Γ'
        → All2_fold (λ (Γ Γ'0 : list A) (d d' : A), P Γ d × Q Γ Γ'0 d d') Γ
            Γ'
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
Γ : list A
X : All_fold P Γ
p : P Γ d
IHX : ∀ Γ' : list A,
        All2_fold Q Γ Γ'
        → All2_fold (λ (Γ Γ'0 : list A) (d d' : A), P Γ d × Q Γ Γ'0 d d') Γ
            Γ'
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
Γ : list A
X : All_fold P Γ
p : P Γ d
IHX : ∀ Γ' : list A,
        All2_fold Q Γ Γ'
        → All2_fold (λ (Γ Γ'0 : list A) (d d' : A), P Γ d × Q Γ Γ'0 d d') Γ
            Γ'
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
Γ : list A
X : All_fold P Γ
p : P Γ d
IHX : ∀ Γ' : list A,
        All2_fold Q Γ Γ'
        → All2_fold (λ (Γ Γ'0 : list A) (d d' : A), P Γ d × Q Γ Γ'0 d d') Γ
            Γ'
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
Γ : list A
X : All_fold P Γ
p : P Γ d
IHX : ∀ Γ' : list A,
        All2_fold Q Γ Γ'
        → All2_fold (λ (Γ Γ'0 : list A) (d d' : A), P Γ d × Q Γ Γ'0 d d') Γ
            Γ'
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
Γ : list A
X : All_fold P Γ
p : P Γ d
IHX : ∀ Γ' : list A,
        All2_fold Q Γ Γ'
        → All2_fold (λ (Γ Γ'0 : list A) (d d' : A), P Γ d × Q Γ Γ'0 d d') Γ
            Γ'
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
Γ : list A
X : All_fold P Γ
p : P Γ d
IHX : ∀ Γ' : list A,
        All2_fold Q Γ Γ'
        → All2_fold (λ (Γ Γ'0 : list A) (d d' : A), P Γ d × Q Γ Γ'0 d d') Γ
            Γ'
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
Γ : list A
X : All_fold P Γ
p : P Γ d
IHX : ∀ Γ' : list A,
        All2_fold Q Γ Γ'
        → All2_fold (λ (Γ Γ'0 : list A) (d d' : A), P Γ d × Q Γ Γ'0 d d') Γ
            Γ'
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
Γ : list A
X : All_fold P Γ
p : P Γ d
IHX : ∀ Γ' : list A,
        All2_fold Q Γ Γ'
        → All2_fold (λ (Γ Γ'0 : list A) (d d' : A), P Γ d × Q Γ Γ'0 d d') Γ
            Γ'
H1', H1 : list A
H : All2_fold Q H1' H1