Goal:
  
  A : Type
  B : Type
  C : Type
  P : nat → A → B → Type
  Q : B → C → Type
  R : nat → A → C → Type
  S : nat → A → C → Type
  n : nat
  c1' : nat
  c1'0 : list A
  c1 : list C
  c : All2i R c1' c1'0 c1
  ============================
   ({| pr1 := n; pr2 := {| pr1 := []; pr2 := [] |} |} =
    {| pr1 := c1'; pr2 := {| pr1 := c1'0; pr2 := c1 |} |}
    → let H := CoreTactics.block in
      (∀ (n : nat) (x : A) (y : B) (z : C),
         P n x y → Q y z → R n x z → S n x z)
      → let H0 := CoreTactics.block in All2i S n [] [])


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
                                  (All2i R c1' c1'0 c1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : nat → A → C → Type
S : nat → A → C → Type
n, c1' : nat
c1'0 : list A
c1 : list C
c : All2i R c1' c1'0 c1


Level 3: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i R c1' c1'0 c1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : nat → A → C → Type
S : nat → A → C → Type
n, c1' : nat
c1'0 : list A
c1 : list C
c : All2i R c1' c1'0 c1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i R c1' c1'0 c1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : nat → A → C → Type
S : nat → A → C → Type
n, c1' : nat
c1'0 : list A
c1 : list C
c : All2i R c1' c1'0 c1

Level 2: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i R c1' c1'0 c1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : nat → A → C → Type
S : nat → A → C → Type
n, c1' : nat
c1'0 : list A
c1 : list C
c : All2i R c1' c1'0 c1


Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i R c1' c1'0 c1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : nat → A → C → Type
S : nat → A → C → Type
n, c1' : nat
c1'0 : list A
c1 : list C
c : All2i R c1' c1'0 c1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i R c1' c1'0 c1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : nat → A → C → Type
S : nat → A → C → Type
n, c1' : nat
c1'0 : list A
c1 : list C
c : All2i R c1' c1'0 c1

Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i R c1' c1'0 c1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : nat → A → C → Type
S : nat → A → C → Type
n, c1' : nat
c1'0 : list A
c1 : list C
c : All2i R c1' c1'0 c1

Level 1: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i R c1' c1'0 c1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : nat → A → C → Type
S : nat → A → C → Type
n, c1' : nat
c1'0 : list A
c1 : list C
c : All2i R c1' c1'0 c1


Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i R c1' c1'0 c1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : nat → A → C → Type
S : nat → A → C → Type
n, c1' : nat
c1'0 : list A
c1 : list C
c : All2i R c1' c1'0 c1

Level 0: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (All2i R c1' c1'0 c1)"
in
environment:
A : Type
B : Type
C : Type
P : nat → A → B → Type
Q : B → C → Type
R : nat → A → C → Type
S : nat → A → C → Type
n, c1' : nat
c1'0 : list A
c1 : list C
c : All2i R c1' c1'0 c1