Goal:
  
  A : Type
  l3 : list A
  R1 : A → A → Type
  R2 : A → A → Type
  R3 : A → A → Type
  hd : A
  tl : list A
  tl' : list A
  o : OnOne2 R1 tl tl'
  IHo : ∀ l3 : list A,
          All2 R2 tl l3
          → (∀ x y : A, R2 x y → R3 x y)
            → (∀ x y z : A, R1 x y → R2 x z → R3 y z) → All2 R3 tl' l3
  H1' : list A
  H1 : list A
  H : All2 R2 H1' H1
  ============================
   ({| pr1 := hd :: tl; pr2 := l3 |} = {| pr1 := H1'; pr2 := H1 |}
    → let H := CoreTactics.block in
      let H0 := CoreTactics.block in
      (∀ x y : A, R2 x y → R3 x y)
      → (∀ x y z : A, R1 x y → R2 x z → R3 y z) → All2 R3 (hd :: tl') l3)


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 R2 H1' H1)"
in
environment:
A : Type
l3 : list A
R1 : A → A → Type
R2 : A → A → Type
R3 : A → A → Type
hd : A
tl, tl' : list A
o : OnOne2 R1 tl tl'
IHo : ∀ l3 : list A,
        All2 R2 tl l3
        → (∀ x y : A, R2 x y → R3 x y)
          → (∀ x y z : A, R1 x y → R2 x z → R3 y z) → All2 R3 tl' l3
H1', H1 : list A
H : All2 R2 H1' H1


Level 3: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 R2 H1' H1)"
in
environment:
A : Type
l3 : list A
R1 : A → A → Type
R2 : A → A → Type
R3 : A → A → Type
hd : A
tl, tl' : list A
o : OnOne2 R1 tl tl'
IHo : ∀ l3 : list A,
        All2 R2 tl l3
        → (∀ x y : A, R2 x y → R3 x y)
          → (∀ x y z : A, R1 x y → R2 x z → R3 y z) → All2 R3 tl' l3
H1', H1 : list A
H : All2 R2 H1' H1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 R2 H1' H1)"
in
environment:
A : Type
l3 : list A
R1 : A → A → Type
R2 : A → A → Type
R3 : A → A → Type
hd : A
tl, tl' : list A
o : OnOne2 R1 tl tl'
IHo : ∀ l3 : list A,
        All2 R2 tl l3
        → (∀ x y : A, R2 x y → R3 x y)
          → (∀ x y z : A, R1 x y → R2 x z → R3 y z) → All2 R3 tl' l3
H1', H1 : list A
H : All2 R2 H1' H1

Level 2: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 R2 H1' H1)"
in
environment:
A : Type
l3 : list A
R1 : A → A → Type
R2 : A → A → Type
R3 : A → A → Type
hd : A
tl, tl' : list A
o : OnOne2 R1 tl tl'
IHo : ∀ l3 : list A,
        All2 R2 tl l3
        → (∀ x y : A, R2 x y → R3 x y)
          → (∀ x y z : A, R1 x y → R2 x z → R3 y z) → All2 R3 tl' l3
H1', H1 : list A
H : All2 R2 H1' H1


Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 R2 H1' H1)"
in
environment:
A : Type
l3 : list A
R1 : A → A → Type
R2 : A → A → Type
R3 : A → A → Type
hd : A
tl, tl' : list A
o : OnOne2 R1 tl tl'
IHo : ∀ l3 : list A,
        All2 R2 tl l3
        → (∀ x y : A, R2 x y → R3 x y)
          → (∀ x y z : A, R1 x y → R2 x z → R3 y z) → All2 R3 tl' l3
H1', H1 : list A
H : All2 R2 H1' H1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 R2 H1' H1)"
in
environment:
A : Type
l3 : list A
R1 : A → A → Type
R2 : A → A → Type
R3 : A → A → Type
hd : A
tl, tl' : list A
o : OnOne2 R1 tl tl'
IHo : ∀ l3 : list A,
        All2 R2 tl l3
        → (∀ x y : A, R2 x y → R3 x y)
          → (∀ x y z : A, R1 x y → R2 x z → R3 y z) → All2 R3 tl' l3
H1', H1 : list A
H : All2 R2 H1' H1

Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 R2 H1' H1)"
in
environment:
A : Type
l3 : list A
R1 : A → A → Type
R2 : A → A → Type
R3 : A → A → Type
hd : A
tl, tl' : list A
o : OnOne2 R1 tl tl'
IHo : ∀ l3 : list A,
        All2 R2 tl l3
        → (∀ x y : A, R2 x y → R3 x y)
          → (∀ x y z : A, R1 x y → R2 x z → R3 y z) → All2 R3 tl' l3
H1', H1 : list A
H : All2 R2 H1' H1

Level 1: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 R2 H1' H1)"
in
environment:
A : Type
l3 : list A
R1 : A → A → Type
R2 : A → A → Type
R3 : A → A → Type
hd : A
tl, tl' : list A
o : OnOne2 R1 tl tl'
IHo : ∀ l3 : list A,
        All2 R2 tl l3
        → (∀ x y : A, R2 x y → R3 x y)
          → (∀ x y z : A, R1 x y → R2 x z → R3 y z) → All2 R3 tl' l3
H1', H1 : list A
H : All2 R2 H1' H1


Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 R2 H1' H1)"
in
environment:
A : Type
l3 : list A
R1 : A → A → Type
R2 : A → A → Type
R3 : A → A → Type
hd : A
tl, tl' : list A
o : OnOne2 R1 tl tl'
IHo : ∀ l3 : list A,
        All2 R2 tl l3
        → (∀ x y : A, R2 x y → R3 x y)
          → (∀ x y z : A, R1 x y → R2 x z → R3 y z) → All2 R3 tl' l3
H1', H1 : list A
H : All2 R2 H1' H1

Level 0: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2 R2 H1' H1)"
in
environment:
A : Type
l3 : list A
R1 : A → A → Type
R2 : A → A → Type
R3 : A → A → Type
hd : A
tl, tl' : list A
o : OnOne2 R1 tl tl'
IHo : ∀ l3 : list A,
        All2 R2 tl l3
        → (∀ x y : A, R2 x y → R3 x y)
          → (∀ x y z : A, R1 x y → R2 x z → R3 y z) → All2 R3 tl' l3
H1', H1 : list A
H : All2 R2 H1' H1