Goal:
  
  z : t
  hd : A.t
  tl : list A.t
  hd' : A.t
  tl' : list A.t
  H : A.lt hd hd'
  H'1' : list A.t
  H'1 : list A.t
  H' : lt_ H'1' H'1
  ============================
   ({| pr1 := hd' :: tl'; pr2 := z |} = {| pr1 := H'1'; pr2 := H'1 |} ->
    let H := CoreTactics.block in
    let H0 := CoreTactics.block in lt (hd :: tl) z)


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
                                  (lt_ H'1' H'1)"
in
environment:
z : t
hd : A.t
tl : list A.t
hd' : A.t
tl' : list A.t
H : A.lt hd hd'
H'1', H'1 : list A.t
H' : lt_ H'1' H'1


Level 3: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (lt_ H'1' H'1)"
in
environment:
z : t
hd : A.t
tl : list A.t
hd' : A.t
tl' : list A.t
H : A.lt hd hd'
H'1', H'1 : list A.t
H' : lt_ H'1' H'1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (lt_ H'1' H'1)"
in
environment:
z : t
hd : A.t
tl : list A.t
hd' : A.t
tl' : list A.t
H : A.lt hd hd'
H'1', H'1 : list A.t
H' : lt_ H'1' H'1

Level 2: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (lt_ H'1' H'1)"
in
environment:
z : t
hd : A.t
tl : list A.t
hd' : A.t
tl' : list A.t
H : A.lt hd hd'
H'1', H'1 : list A.t
H' : lt_ H'1' H'1


Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (lt_ H'1' H'1)"
in
environment:
z : t
hd : A.t
tl : list A.t
hd' : A.t
tl' : list A.t
H : A.lt hd hd'
H'1', H'1 : list A.t
H' : lt_ H'1' H'1

Level 2: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (lt_ H'1' H'1)"
in
environment:
z : t
hd : A.t
tl : list A.t
hd' : A.t
tl' : list A.t
H : A.lt hd hd'
H'1', H'1 : list A.t
H' : lt_ H'1' H'1

Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (lt_ H'1' H'1)"
in
environment:
z : t
hd : A.t
tl : list A.t
hd' : A.t
tl' : list A.t
H : A.lt hd hd'
H'1', H'1 : list A.t
H' : lt_ H'1' H'1

Level 1: evaluation
raised the exception
Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (lt_ H'1' H'1)"
in
environment:
z : t
hd : A.t
tl : list A.t
hd' : A.t
tl' : list A.t
H : A.lt hd hd'
H'1', H'1 : list A.t
H' : lt_ H'1' H'1


Level 1: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (lt_ H'1' H'1)"
in
environment:
z : t
hd : A.t
tl : list A.t
hd' : A.t
tl' : list A.t
H : A.lt hd hd'
H'1', H'1 : list A.t
H' : lt_ H'1' H'1

Level 0: Backtrace:


Could not find an instance for "DepElim.DependentEliminationPackage
                                  (lt_ H'1' H'1)"
in
environment:
z : t
hd : A.t
tl : list A.t
hd' : A.t
tl' : list A.t
H : A.lt hd hd'
H'1', H'1 : list A.t
H' : lt_ H'1' H'1