Goal:
  
  A : Type
  B : Type
  C : Type
  R : A → C → Type
  g : A → B → C
  x : A
  xs : list A
  ih : ∀ l' : list B,
         All2 (λ (x : A) (y : B), R x (g x y)) xs l'
         → All2 R xs (map2 g xs l')
  z1' : list A
  z1 : list B
  z : All2 (λ (x : A) (y : B), R x (g x y)) z1' z1
  ============================
   ({| pr1 := x :: xs; pr2 := [] |} = {| pr1 := z1'; pr2 := z1 |}
    → let H := CoreTactics.block in
      let H0 := CoreTactics.block in All2 R (x :: xs) [])


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 (λ (x : A) (y : B), R x (g x y)) z1'
                                     z1)"
in
environment:
A : Type
B : Type
C : Type
R : A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ l' : list B,
       All2 (λ (x : A) (y : B), R x (g x y)) xs l' → All2 R xs (map2 g xs l')
z1' : list A
z1 : list B
z : All2 (λ (x : A) (y : B), R x (g x y)) z1' z1


Level 3: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 (λ (x : A) (y : B), R x (g x y)) z1'
                                     z1)"
in
environment:
A : Type
B : Type
C : Type
R : A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ l' : list B,
       All2 (λ (x : A) (y : B), R x (g x y)) xs l' → All2 R xs (map2 g xs l')
z1' : list A
z1 : list B
z : All2 (λ (x : A) (y : B), R x (g x y)) z1' z1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 (λ (x : A) (y : B), R x (g x y)) z1'
                                     z1)"
in
environment:
A : Type
B : Type
C : Type
R : A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ l' : list B,
       All2 (λ (x : A) (y : B), R x (g x y)) xs l' → All2 R xs (map2 g xs l')
z1' : list A
z1 : list B
z : All2 (λ (x : A) (y : B), R x (g x y)) z1' z1

Level 2: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 (λ (x : A) (y : B), R x (g x y)) z1'
                                     z1)"
in
environment:
A : Type
B : Type
C : Type
R : A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ l' : list B,
       All2 (λ (x : A) (y : B), R x (g x y)) xs l' → All2 R xs (map2 g xs l')
z1' : list A
z1 : list B
z : All2 (λ (x : A) (y : B), R x (g x y)) z1' z1


Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 (λ (x : A) (y : B), R x (g x y)) z1'
                                     z1)"
in
environment:
A : Type
B : Type
C : Type
R : A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ l' : list B,
       All2 (λ (x : A) (y : B), R x (g x y)) xs l' → All2 R xs (map2 g xs l')
z1' : list A
z1 : list B
z : All2 (λ (x : A) (y : B), R x (g x y)) z1' z1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 (λ (x : A) (y : B), R x (g x y)) z1'
                                     z1)"
in
environment:
A : Type
B : Type
C : Type
R : A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ l' : list B,
       All2 (λ (x : A) (y : B), R x (g x y)) xs l' → All2 R xs (map2 g xs l')
z1' : list A
z1 : list B
z : All2 (λ (x : A) (y : B), R x (g x y)) z1' z1

Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 (λ (x : A) (y : B), R x (g x y)) z1'
                                     z1)"
in
environment:
A : Type
B : Type
C : Type
R : A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ l' : list B,
       All2 (λ (x : A) (y : B), R x (g x y)) xs l' → All2 R xs (map2 g xs l')
z1' : list A
z1 : list B
z : All2 (λ (x : A) (y : B), R x (g x y)) z1' z1

Level 1: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 (λ (x : A) (y : B), R x (g x y)) z1'
                                     z1)"
in
environment:
A : Type
B : Type
C : Type
R : A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ l' : list B,
       All2 (λ (x : A) (y : B), R x (g x y)) xs l' → All2 R xs (map2 g xs l')
z1' : list A
z1 : list B
z : All2 (λ (x : A) (y : B), R x (g x y)) z1' z1


Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 (λ (x : A) (y : B), R x (g x y)) z1'
                                     z1)"
in
environment:
A : Type
B : Type
C : Type
R : A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ l' : list B,
       All2 (λ (x : A) (y : B), R x (g x y)) xs l' → All2 R xs (map2 g xs l')
z1' : list A
z1 : list B
z : All2 (λ (x : A) (y : B), R x (g x y)) z1' z1

Level 0: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 (λ (x : A) (y : B), R x (g x y)) z1'
                                     z1)"
in
environment:
A : Type
B : Type
C : Type
R : A → C → Type
g : A → B → C
x : A
xs : list A
ih : ∀ l' : list B,
       All2 (λ (x : A) (y : B), R x (g x y)) xs l' → All2 R xs (map2 g xs l')
z1' : list A
z1 : list B
z : All2 (λ (x : A) (y : B), R x (g x y)) z1' z1