Inductive state_behaves (s: state L): program_behavior -> Prop :=
  | state_terminates: forall t s' r,
      Star L s t s' ->
      final_state L s' r ->
      state_behaves s (Terminates t r)
  | state_diverges: forall t s',
      Star L s t s' -> Forever_silent L s' ->
      state_behaves s (Diverges t)
  | state_reacts: forall T,
      Forever_reactive L s T ->
      state_behaves s (Reacts T)
  | state_goes_wrong: forall t s',
      Star L s t s' ->
      Nostep L s' ->
      (forall r, ~final_state L s' r) ->
      state_behaves s (Goes_wrong t).Inductive state_behaves (s: state L): program_behavior -> Prop :=
  | state_terminates: forall t s' r,
      Star L s t s' ->
      final_state L s' r ->
      state_behaves s (Terminates t r)
  | state_diverges: forall t s',
      Star L s t s' -> Forever_silent L s' ->
      state_behaves s (Diverges t)
  | state_reacts: forall T,
      Forever_reactive L s T ->
      state_behaves s (Reacts T)
  | state_goes_wrong: forall t s',
      Star L s t s' ->
      Nostep L s' ->
      (forall r, ~final_state L s' r) ->
      state_behaves s (Goes_wrong t).Inductive state_behaves (s: state L): program_behavior -> Prop :=
  | state_terminates: forall t s' r,
      Star L s t s' ->
      final_state L s' r ->
      state_behaves s (Terminates t r)
  | state_diverges: forall t s',
      Star L s t s' -> Forever_silent L s' ->
      state_behaves s (Diverges t)
  | state_reacts: forall T,
      Forever_reactive L s T ->
      state_behaves s (Reacts T)
  | state_goes_wrong: forall t s',
      Star L s t s' ->
      Nostep L s' ->
      (forall r, ~final_state L s' r) ->
      state_behaves s (Goes_wrong t).Inductive state_behaves (s: state L): program_behavior -> Prop :=
  | state_terminates: forall t s' r,
      Star L s t s' ->
      final_state L s' r ->
      state_behaves s (Terminates t r)
  | state_diverges: forall t s',
      Star L s t s' -> Forever_silent L s' ->
      state_behaves s (Diverges t)
  | state_reacts: forall T,
      Forever_reactive L s T ->
      state_behaves s (Reacts T)
  | state_goes_wrong: forall t s',
      Star L s t s' ->
      Nostep L s' ->
      (forall r, ~final_state L s' r) ->
      state_behaves s (Goes_wrong t).Inductive state_behaves (s: state L): program_behavior -> Prop :=
  | state_terminates: forall t s' r,
      Star L s t s' ->
      final_state L s' r ->
      state_behaves s (Terminates t r)
  | state_diverges: forall t s',
      Star L s t s' -> Forever_silent L s' ->
      state_behaves s (Diverges t)
  | state_reacts: forall T,
      Forever_reactive L s T ->
      state_behaves s (Reacts T)
  | state_goes_wrong: forall t s',
      Star L s t s' ->
      Nostep L s' ->
      (forall r, ~final_state L s' r) ->
      state_behaves s (Goes_wrong t).Inductive program_behaves: program_behavior -> Prop :=
  | program_runs: forall s beh,
      initial_state L s -> state_behaves s beh ->
      program_behaves beh
  | program_goes_initially_wrong:
      (forall s, ~initial_state L s) ->
      program_behaves (Goes_wrong E0).Inductive program_behaves: program_behavior -> Prop :=
  | program_runs: forall s beh,
      initial_state L s -> state_behaves s beh ->
      program_behaves beh
  | program_goes_initially_wrong:
      (forall s, ~initial_state L s) ->
      program_behaves (Goes_wrong E0).Inductive program_behaves: program_behavior -> Prop :=
  | program_runs: forall s beh,
      initial_state L s -> state_behaves s beh ->
      program_behaves beh
  | program_goes_initially_wrong:
      (forall s, ~initial_state L s) ->
      program_behaves (Goes_wrong E0).

Lemma reacts': forall s1 t1, Star L s0 t1 s1 -> { s2 : state L & { t2 : trace | Star L s1 t2 s2 /\ t2 <> E0 } }.