(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.(* (f_P_even P f true) means that all free occurrences of the relational
   variable P in f are under an even number of negations.
   (f_P_even P f false) means that all free occurrences of the relational 
   variable P in f are under an odd number of negations. *)
Inductive f_P_even (P : ad) : mu_form -> bool -> Prop :=
  | mu_0_even : f_P_even P mu_0 true
  | mu_0_odd : f_P_even P mu_0 false
  | mu_1_even : f_P_even P mu_1 true
  | mu_1_odd : f_P_even P mu_1 false
  | mu_ap_even : forall p : ad, f_P_even P (mu_ap p) true
  | mu_ap_odd : forall p : ad, f_P_even P (mu_ap p) false
  | mu_rel_var_even :
      forall Q : ad,
      f_P_even P (mu_rel_var Q) true
      (* one new clause added ... *)
  | mu_rel_var_odd :
      forall Q : ad, Neqb P Q = false -> f_P_even P (mu_rel_var Q) false
  | mu_neg_odd :
      forall f : mu_form, f_P_even P f true -> f_P_even P (mu_neg f) false
  | mu_neg_even :
      forall f : mu_form, f_P_even P f false -> f_P_even P (mu_neg f) true
  | mu_and_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_and f g) true
  | mu_and_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_and f g) false
  | mu_or_even :
      forall f g : mu_form,
      f_P_even P f true -> f_P_even P g true -> f_P_even P (mu_or f g) true
  | mu_or_odd :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_or f g) false
  | mu_impl_even :
      forall f g : mu_form,
      f_P_even P f false ->
      f_P_even P g true -> f_P_even P (mu_impl f g) true
  | mu_impl_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g false -> f_P_even P (mu_impl f g) false
  | mu_iff_even :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) true
  | mu_iff_odd :
      forall f g : mu_form,
      f_P_even P f true ->
      f_P_even P g true ->
      f_P_even P f false ->
      f_P_even P g false -> f_P_even P (mu_iff f g) false
  | mu_all_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_all t f) true
  | mu_all_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_all t f) false
  | mu_ex_even :
      forall (t : ad) (f : mu_form),
      f_P_even P f true -> f_P_even P (mu_ex t f) true
  | mu_ex_odd :
      forall (t : ad) (f : mu_form),
      f_P_even P f false -> f_P_even P (mu_ex t f) false
  | mu_mu_P_even : forall f : mu_form, f_P_even P (mu_mu P f) true
  | mu_mu_P_odd : forall f : mu_form, f_P_even P (mu_mu P f) false
  | mu_mu_Q_even :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f true -> f_P_even P (mu_mu Q f) true
  | mu_mu_Q_odd :
      forall (Q : ad) (f : mu_form),
      Neqb P Q = false -> f_P_even P f false -> f_P_even P (mu_mu Q f) false.Inductive f_ok : mu_form -> Prop :=
  | mu_0_f_ok : f_ok mu_0
  | mu_1_f_ok : f_ok mu_1
  | mu_ap_f_ok : forall p : ad, f_ok (mu_ap p)
  | mu_rel_var_f_ok : forall P : ad, f_ok (mu_rel_var P)
  | mu_neg_f_ok : forall f : mu_form, f_ok f -> f_ok (mu_neg f)
  | mu_and_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_and f g)
  | mu_or_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_or f g)
  | mu_impl_f_ok :
      forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_impl f g)
  | mu_iff_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_iff f g)
  | mu_all_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_all t f)
  | mu_ex_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_ex t f)
  | mu_mu_f_ok :
      forall (P : ad) (f : mu_form),
      f_ok f -> f_P_even P f true -> f_ok (mu_mu P f).Inductive f_ok : mu_form -> Prop :=
  | mu_0_f_ok : f_ok mu_0
  | mu_1_f_ok : f_ok mu_1
  | mu_ap_f_ok : forall p : ad, f_ok (mu_ap p)
  | mu_rel_var_f_ok : forall P : ad, f_ok (mu_rel_var P)
  | mu_neg_f_ok : forall f : mu_form, f_ok f -> f_ok (mu_neg f)
  | mu_and_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_and f g)
  | mu_or_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_or f g)
  | mu_impl_f_ok :
      forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_impl f g)
  | mu_iff_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_iff f g)
  | mu_all_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_all t f)
  | mu_ex_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_ex t f)
  | mu_mu_f_ok :
      forall (P : ad) (f : mu_form),
      f_ok f -> f_P_even P f true -> f_ok (mu_mu P f).Inductive f_ok : mu_form -> Prop :=
  | mu_0_f_ok : f_ok mu_0
  | mu_1_f_ok : f_ok mu_1
  | mu_ap_f_ok : forall p : ad, f_ok (mu_ap p)
  | mu_rel_var_f_ok : forall P : ad, f_ok (mu_rel_var P)
  | mu_neg_f_ok : forall f : mu_form, f_ok f -> f_ok (mu_neg f)
  | mu_and_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_and f g)
  | mu_or_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_or f g)
  | mu_impl_f_ok :
      forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_impl f g)
  | mu_iff_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_iff f g)
  | mu_all_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_all t f)
  | mu_ex_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_ex t f)
  | mu_mu_f_ok :
      forall (P : ad) (f : mu_form),
      f_ok f -> f_P_even P f true -> f_ok (mu_mu P f).Inductive f_ok : mu_form -> Prop :=
  | mu_0_f_ok : f_ok mu_0
  | mu_1_f_ok : f_ok mu_1
  | mu_ap_f_ok : forall p : ad, f_ok (mu_ap p)
  | mu_rel_var_f_ok : forall P : ad, f_ok (mu_rel_var P)
  | mu_neg_f_ok : forall f : mu_form, f_ok f -> f_ok (mu_neg f)
  | mu_and_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_and f g)
  | mu_or_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_or f g)
  | mu_impl_f_ok :
      forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_impl f g)
  | mu_iff_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_iff f g)
  | mu_all_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_all t f)
  | mu_ex_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_ex t f)
  | mu_mu_f_ok :
      forall (P : ad) (f : mu_form),
      f_ok f -> f_P_even P f true -> f_ok (mu_mu P f).Inductive f_ok : mu_form -> Prop :=
  | mu_0_f_ok : f_ok mu_0
  | mu_1_f_ok : f_ok mu_1
  | mu_ap_f_ok : forall p : ad, f_ok (mu_ap p)
  | mu_rel_var_f_ok : forall P : ad, f_ok (mu_rel_var P)
  | mu_neg_f_ok : forall f : mu_form, f_ok f -> f_ok (mu_neg f)
  | mu_and_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_and f g)
  | mu_or_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_or f g)
  | mu_impl_f_ok :
      forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_impl f g)
  | mu_iff_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_iff f g)
  | mu_all_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_all t f)
  | mu_ex_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_ex t f)
  | mu_mu_f_ok :
      forall (P : ad) (f : mu_form),
      f_ok f -> f_P_even P f true -> f_ok (mu_mu P f).Inductive f_ok : mu_form -> Prop :=
  | mu_0_f_ok : f_ok mu_0
  | mu_1_f_ok : f_ok mu_1
  | mu_ap_f_ok : forall p : ad, f_ok (mu_ap p)
  | mu_rel_var_f_ok : forall P : ad, f_ok (mu_rel_var P)
  | mu_neg_f_ok : forall f : mu_form, f_ok f -> f_ok (mu_neg f)
  | mu_and_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_and f g)
  | mu_or_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_or f g)
  | mu_impl_f_ok :
      forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_impl f g)
  | mu_iff_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_iff f g)
  | mu_all_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_all t f)
  | mu_ex_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_ex t f)
  | mu_mu_f_ok :
      forall (P : ad) (f : mu_form),
      f_ok f -> f_P_even P f true -> f_ok (mu_mu P f).Inductive f_ok : mu_form -> Prop :=
  | mu_0_f_ok : f_ok mu_0
  | mu_1_f_ok : f_ok mu_1
  | mu_ap_f_ok : forall p : ad, f_ok (mu_ap p)
  | mu_rel_var_f_ok : forall P : ad, f_ok (mu_rel_var P)
  | mu_neg_f_ok : forall f : mu_form, f_ok f -> f_ok (mu_neg f)
  | mu_and_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_and f g)
  | mu_or_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_or f g)
  | mu_impl_f_ok :
      forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_impl f g)
  | mu_iff_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_iff f g)
  | mu_all_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_all t f)
  | mu_ex_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_ex t f)
  | mu_mu_f_ok :
      forall (P : ad) (f : mu_form),
      f_ok f -> f_P_even P f true -> f_ok (mu_mu P f).Inductive f_ok : mu_form -> Prop :=
  | mu_0_f_ok : f_ok mu_0
  | mu_1_f_ok : f_ok mu_1
  | mu_ap_f_ok : forall p : ad, f_ok (mu_ap p)
  | mu_rel_var_f_ok : forall P : ad, f_ok (mu_rel_var P)
  | mu_neg_f_ok : forall f : mu_form, f_ok f -> f_ok (mu_neg f)
  | mu_and_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_and f g)
  | mu_or_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_or f g)
  | mu_impl_f_ok :
      forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_impl f g)
  | mu_iff_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_iff f g)
  | mu_all_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_all t f)
  | mu_ex_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_ex t f)
  | mu_mu_f_ok :
      forall (P : ad) (f : mu_form),
      f_ok f -> f_P_even P f true -> f_ok (mu_mu P f).Inductive f_ok : mu_form -> Prop :=
  | mu_0_f_ok : f_ok mu_0
  | mu_1_f_ok : f_ok mu_1
  | mu_ap_f_ok : forall p : ad, f_ok (mu_ap p)
  | mu_rel_var_f_ok : forall P : ad, f_ok (mu_rel_var P)
  | mu_neg_f_ok : forall f : mu_form, f_ok f -> f_ok (mu_neg f)
  | mu_and_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_and f g)
  | mu_or_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_or f g)
  | mu_impl_f_ok :
      forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_impl f g)
  | mu_iff_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_iff f g)
  | mu_all_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_all t f)
  | mu_ex_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_ex t f)
  | mu_mu_f_ok :
      forall (P : ad) (f : mu_form),
      f_ok f -> f_P_even P f true -> f_ok (mu_mu P f).Inductive f_ok : mu_form -> Prop :=
  | mu_0_f_ok : f_ok mu_0
  | mu_1_f_ok : f_ok mu_1
  | mu_ap_f_ok : forall p : ad, f_ok (mu_ap p)
  | mu_rel_var_f_ok : forall P : ad, f_ok (mu_rel_var P)
  | mu_neg_f_ok : forall f : mu_form, f_ok f -> f_ok (mu_neg f)
  | mu_and_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_and f g)
  | mu_or_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_or f g)
  | mu_impl_f_ok :
      forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_impl f g)
  | mu_iff_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_iff f g)
  | mu_all_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_all t f)
  | mu_ex_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_ex t f)
  | mu_mu_f_ok :
      forall (P : ad) (f : mu_form),
      f_ok f -> f_P_even P f true -> f_ok (mu_mu P f).Inductive f_ok : mu_form -> Prop :=
  | mu_0_f_ok : f_ok mu_0
  | mu_1_f_ok : f_ok mu_1
  | mu_ap_f_ok : forall p : ad, f_ok (mu_ap p)
  | mu_rel_var_f_ok : forall P : ad, f_ok (mu_rel_var P)
  | mu_neg_f_ok : forall f : mu_form, f_ok f -> f_ok (mu_neg f)
  | mu_and_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_and f g)
  | mu_or_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_or f g)
  | mu_impl_f_ok :
      forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_impl f g)
  | mu_iff_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_iff f g)
  | mu_all_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_all t f)
  | mu_ex_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_ex t f)
  | mu_mu_f_ok :
      forall (P : ad) (f : mu_form),
      f_ok f -> f_P_even P f true -> f_ok (mu_mu P f).Inductive f_ok : mu_form -> Prop :=
  | mu_0_f_ok : f_ok mu_0
  | mu_1_f_ok : f_ok mu_1
  | mu_ap_f_ok : forall p : ad, f_ok (mu_ap p)
  | mu_rel_var_f_ok : forall P : ad, f_ok (mu_rel_var P)
  | mu_neg_f_ok : forall f : mu_form, f_ok f -> f_ok (mu_neg f)
  | mu_and_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_and f g)
  | mu_or_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_or f g)
  | mu_impl_f_ok :
      forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_impl f g)
  | mu_iff_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_iff f g)
  | mu_all_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_all t f)
  | mu_ex_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_ex t f)
  | mu_mu_f_ok :
      forall (P : ad) (f : mu_form),
      f_ok f -> f_P_even P f true -> f_ok (mu_mu P f).Inductive f_ok : mu_form -> Prop :=
  | mu_0_f_ok : f_ok mu_0
  | mu_1_f_ok : f_ok mu_1
  | mu_ap_f_ok : forall p : ad, f_ok (mu_ap p)
  | mu_rel_var_f_ok : forall P : ad, f_ok (mu_rel_var P)
  | mu_neg_f_ok : forall f : mu_form, f_ok f -> f_ok (mu_neg f)
  | mu_and_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_and f g)
  | mu_or_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_or f g)
  | mu_impl_f_ok :
      forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_impl f g)
  | mu_iff_f_ok : forall f g : mu_form, f_ok f -> f_ok g -> f_ok (mu_iff f g)
  | mu_all_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_all t f)
  | mu_ex_f_ok : forall (t : ad) (f : mu_form), f_ok f -> f_ok (mu_ex t f)
  | mu_mu_f_ok :
      forall (P : ad) (f : mu_form),
      f_ok f -> f_P_even P f true -> f_ok (mu_mu P f).Definition cfg_ul_bre_ok (cfg : BDDconfig) (ul : list ad) 
  (bre : Brel_env) :=
  forall P node : ad, MapGet _ bre P = Some node -> used_node' cfg ul node.Definition cfg_ul_bte_ok (cfg : BDDconfig) (ul : list ad)
  (bte : Btrans_env) :=
  forall t node : ad, MapGet _ bte t = Some node -> used_node' cfg ul node.Definition cfg_re_bre_ok (cfg : BDDconfig) (re : rel_env) 
  (bre : Brel_env) :=
  forall P node : ad,
  MapGet _ bre P = Some node ->
  bool_fun_eq (bool_fun_of_BDD cfg node) (bool_fun_of_bool_expr (re P)).Definition cfg_te_bte_ok (cfg : BDDconfig) (te : trans_env)
  (bte : Btrans_env) :=
  forall t node : ad,
  MapGet _ bte t = Some node ->
  bool_fun_eq (bool_fun_of_BDD cfg node) (bool_fun_of_bool_expr (te t)).Definition f_bre_ok (f : mu_form) (bre : Brel_env) :=
  forall P : ad, mu_rel_free P f = true -> in_dom _ P bre = true.Definition f_bte_ok (f : mu_form) (bte : Btrans_env) :=
  forall t : ad, mu_t_free t f = true -> in_dom _ t bte = true.

Lemma BDDiter2n_lemma1 : forall (te : trans_env) (bte : Btrans_env) (g : mu_form) (Bf : mu_form -> BDDconfig -> list ad -> Brel_env -> BDDconfig * ad) (f : mu_form -> rel_env -> bool_expr), (forall (cfg : BDDconfig) (ul : list ad) (re : rel_env) (bre : Brel_env), BDDconfig_OK cfg -> used_list_OK cfg ul -> cfg_ul_bre_ok cfg ul bre -> cfg_re_bre_ok cfg re bre -> cfg_ul_bte_ok cfg ul bte -> cfg_te_bte_ok cfg te bte -> f_bre_ok g bre -> f_bte_ok g bte -> BDDconfig_OK (fst (Bf g cfg ul bre)) /\ config_node_OK (fst (Bf g cfg ul bre)) (snd (Bf g cfg ul bre)) /\ used_nodes_preserved cfg (fst (Bf g cfg ul bre)) ul /\ bool_fun_eq (bool_fun_of_BDD (fst (Bf g cfg ul bre)) (snd (Bf g cfg ul bre))) (bool_fun_of_bool_expr (f g re))) -> forall (n : nat) (P : ad) (cfg : BDDconfig) (node : ad) (ul : list ad) (be : bool_expr) (re : rel_env) (bre : Brel_env), BDDconfig_OK cfg -> config_node_OK cfg node -> used_list_OK cfg ul -> cfg_ul_bre_ok cfg ul bre -> cfg_re_bre_ok cfg re bre -> cfg_ul_bte_ok cfg ul bte -> cfg_te_bte_ok cfg te bte -> (forall x : ad, f_bre_ok g (MapPut _ bre P x)) -> f_bte_ok g bte -> bool_fun_eq (bool_fun_of_BDD cfg node) (bool_fun_of_bool_expr be) -> BDDconfig_OK (fst (fst (BDDiter2n (fun (cfg0 : BDDconfig) (node0 : ad) => Bf g cfg0 (node0 :: ul) (MapPut ad bre P node0)) cfg node n))) /\ config_node_OK (fst (fst (BDDiter2n (fun (cfg0 : BDDconfig) (node0 : ad) => Bf g cfg0 (node0 :: ul) (MapPut ad bre P node0)) cfg node n))) (snd (fst (BDDiter2n (fun (cfg0 : BDDconfig) (node0 : ad) => Bf g cfg0 (node0 :: ul) (MapPut ad bre P node0)) cfg node n))) /\ used_nodes_preserved cfg (fst (fst (BDDiter2n (fun (cfg0 : BDDconfig) (node0 : ad) => Bf g cfg0 (node0 :: ul) (MapPut ad bre P node0)) cfg node n))) ul /\ bool_fun_eq (bool_fun_of_BDD (fst (fst (BDDiter2n (fun (cfg0 : BDDconfig) (node0 : ad) => Bf g cfg0 (node0 :: ul) (MapPut ad bre P node0)) cfg node n))) (snd (fst (BDDiter2n (fun (cfg0 : BDDconfig) (node0 : ad) => Bf g cfg0 (node0 :: ul) (MapPut ad bre P node0)) cfg node n)))) (bool_fun_of_bool_expr (fst (iter2n _ be_eq_dec (fun be : bool_expr => f g (re_put re P be)) be n))).