(* Title: HOL/HOLCF/IOA/CompoScheds.thy
Author: Olaf Müller
*)
section \<open>Compositionality on Schedule level\<close>
theory CompoScheds
imports CompoExecs
begin
definition mkex2 :: "('a, 's) ioa \ ('a, 't) ioa \ 'a Seq \
('a, 's) pairs \<rightarrow> ('a, 't) pairs \<rightarrow> ('s \<Rightarrow> 't \<Rightarrow> ('a, 's \<times> 't) pairs)"
where "mkex2 A B =
(fix \<cdot>
(LAM h sch exA exB.
(\<lambda>s t.
case sch of
nil \<Rightarrow> nil
| x ## xs \<Rightarrow>
(case x of
UU \<Rightarrow> UU
| Def y \<Rightarrow>
(if y \<in> act A then
(if y \<in> act B then
(case HD \<cdot> exA of
UU \<Rightarrow> UU
| Def a \<Rightarrow>
(case HD \<cdot> exB of
UU \<Rightarrow> UU
| Def b \<Rightarrow>
(y, (snd a, snd b)) \<leadsto>
(h \<cdot> xs \<cdot> (TL \<cdot> exA) \<cdot> (TL \<cdot> exB)) (snd a) (snd b)))
else
(case HD \<cdot> exA of
UU \<Rightarrow> UU
| Def a \<Rightarrow> (y, (snd a, t)) \<leadsto> (h \<cdot> xs \<cdot> (TL \<cdot> exA) \<cdot> exB) (snd a) t))
else
(if y \<in> act B then
(case HD \<cdot> exB of
UU \<Rightarrow> UU
| Def b \<Rightarrow> (y, (s, snd b)) \<leadsto> (h \<cdot> xs \<cdot> exA \<cdot> (TL \<cdot> exB)) s (snd b))
else UU))))))"
definition mkex :: "('a, 's) ioa \ ('a, 't) ioa \ 'a Seq \
('a, 's) execution \<Rightarrow> ('a, 't) execution \<Rightarrow> ('a, 's \<times> 't) execution"
where "mkex A B sch exA exB =
((fst exA, fst exB), (mkex2 A B \<cdot> sch \<cdot> (snd exA) \<cdot> (snd exB)) (fst exA) (fst exB))"
definition par_scheds :: "'a schedule_module \ 'a schedule_module \ 'a schedule_module"
where "par_scheds SchedsA SchedsB =
(let
schA = fst SchedsA; sigA = snd SchedsA;
schB = fst SchedsB; sigB = snd SchedsB
in
({sch. Filter (\<lambda>a. a\<in>actions sigA)\<cdot>sch \<in> schA} \<inter>
{sch. Filter (\<lambda>a. a\<in>actions sigB)\<cdot>sch \<in> schB} \<inter>
{sch. Forall (\<lambda>x. x\<in>(actions sigA Un actions sigB)) sch},
asig_comp sigA sigB))"
subsection \<open>\<open>mkex\<close> rewrite rules\<close>
lemma mkex2_unfold:
"mkex2 A B =
(LAM sch exA exB.
(\<lambda>s t.
case sch of
nil \<Rightarrow> nil
| x ## xs \<Rightarrow>
(case x of
UU \<Rightarrow> UU
| Def y \<Rightarrow>
(if y \<in> act A then
(if y \<in> act B then
(case HD \<cdot> exA of
UU \<Rightarrow> UU
| Def a \<Rightarrow>
(case HD \<cdot> exB of
UU \<Rightarrow> UU
| Def b \<Rightarrow>
(y, (snd a, snd b)) \<leadsto>
(mkex2 A B \<cdot> xs \<cdot> (TL \<cdot> exA) \<cdot> (TL \<cdot> exB)) (snd a) (snd b)))
else
(case HD \<cdot> exA of
UU \<Rightarrow> UU
| Def a \<Rightarrow> (y, (snd a, t)) \<leadsto> (mkex2 A B \<cdot> xs \<cdot> (TL \<cdot> exA) \<cdot> exB) (snd a) t))
else
(if y \<in> act B then
(case HD \<cdot> exB of
UU \<Rightarrow> UU
| Def b \<Rightarrow> (y, (s, snd b)) \<leadsto> (mkex2 A B \<cdot> xs \<cdot> exA \<cdot> (TL \<cdot> exB)) s (snd b))
else UU)))))"
apply (rule trans)
apply (rule fix_eq2)
apply (simp only: mkex2_def)
apply (rule beta_cfun)
apply simp
done
lemma mkex2_UU: "(mkex2 A B \ UU \ exA \ exB) s t = UU"
apply (subst mkex2_unfold)
apply simp
done
lemma mkex2_nil: "(mkex2 A B \ nil \ exA \ exB) s t = nil"
apply (subst mkex2_unfold)
apply simp
done
lemma mkex2_cons_1:
"x \ act A \ x \ act B \ HD \ exA = Def a \
(mkex2 A B \<cdot> (x \<leadsto> sch) \<cdot> exA \<cdot> exB) s t =
(x, snd a,t) \<leadsto> (mkex2 A B \<cdot> sch \<cdot> (TL \<cdot> exA) \<cdot> exB) (snd a) t"
apply (rule trans)
apply (subst mkex2_unfold)
apply (simp add: Consq_def If_and_if)
apply (simp add: Consq_def)
done
lemma mkex2_cons_2:
"x \ act A \ x \ act B \ HD \ exB = Def b \
(mkex2 A B \<cdot> (x \<leadsto> sch) \<cdot> exA \<cdot> exB) s t =
(x, s, snd b) \<leadsto> (mkex2 A B \<cdot> sch \<cdot> exA \<cdot> (TL \<cdot> exB)) s (snd b)"
apply (rule trans)
apply (subst mkex2_unfold)
apply (simp add: Consq_def If_and_if)
apply (simp add: Consq_def)
done
lemma mkex2_cons_3:
"x \ act A \ x \ act B \ HD \ exA = Def a \ HD \ exB = Def b \
(mkex2 A B \<cdot> (x \<leadsto> sch) \<cdot> exA \<cdot> exB) s t =
(x, snd a,snd b) \<leadsto> (mkex2 A B \<cdot> sch \<cdot> (TL \<cdot> exA) \<cdot> (TL \<cdot> exB)) (snd a) (snd b)"
apply (rule trans)
apply (subst mkex2_unfold)
apply (simp add: Consq_def If_and_if)
apply (simp add: Consq_def)
done
declare mkex2_UU [simp] mkex2_nil [simp] mkex2_cons_1 [simp]
mkex2_cons_2 [simp] mkex2_cons_3 [simp]
subsection \<open>\<open>mkex\<close>\<close>
lemma mkex_UU: "mkex A B UU (s,exA) (t,exB) = ((s,t),UU)"
by (simp add: mkex_def)
lemma mkex_nil: "mkex A B nil (s,exA) (t,exB) = ((s,t),nil)"
by (simp add: mkex_def)
lemma mkex_cons_1:
"x \ act A \ x \ act B \
mkex A B (x \<leadsto> sch) (s, a \<leadsto> exA) (t, exB) =
((s, t), (x, snd a, t) \<leadsto> snd (mkex A B sch (snd a, exA) (t, exB)))"
apply (unfold mkex_def)
apply (cut_tac exA = "a \ exA" in mkex2_cons_1)
apply auto
done
lemma mkex_cons_2:
"x \ act A \ x \ act B \
mkex A B (x \<leadsto> sch) (s, exA) (t, b \<leadsto> exB) =
((s, t), (x, s, snd b) \<leadsto> snd (mkex A B sch (s, exA) (snd b, exB)))"
apply (unfold mkex_def)
apply (cut_tac exB = "b\exB" in mkex2_cons_2)
apply auto
done
lemma mkex_cons_3:
"x \ act A \ x \ act B \
mkex A B (x \<leadsto> sch) (s, a \<leadsto> exA) (t, b \<leadsto> exB) =
((s, t), (x, snd a, snd b) \<leadsto> snd (mkex A B sch (snd a, exA) (snd b, exB)))"
apply (unfold mkex_def)
apply (cut_tac exB = "b\exB" and exA = "a\exA" in mkex2_cons_3)
apply auto
done
declare mkex2_UU [simp del] mkex2_nil [simp del]
mkex2_cons_1 [simp del] mkex2_cons_2 [simp del] mkex2_cons_3 [simp del]
lemmas composch_simps = mkex_UU mkex_nil mkex_cons_1 mkex_cons_2 mkex_cons_3
declare composch_simps [simp]
subsection \<open>Compositionality on schedule level\<close>
subsubsection \<open>Lemmas for \<open>\<Longrightarrow>\<close>\<close>
lemma lemma_2_1a:
\<comment> \<open>\<open>tfilter ex\<close> and \<open>filter_act\<close> are commutative\<close>
"filter_act \ (Filter_ex2 (asig_of A) \ xs) =
Filter (\<lambda>a. a \<in> act A) \<cdot> (filter_act \<cdot> xs)"
apply (unfold filter_act_def Filter_ex2_def)
apply (simp add: MapFilter o_def)
done
lemma lemma_2_1b:
\<comment> \<open>State-projections do not affect \<open>filter_act\<close>\<close>
"filter_act \ (ProjA2 \ xs) = filter_act \ xs \
filter_act \<cdot> (ProjB2 \<cdot> xs) = filter_act \<cdot> xs"
by (pair_induct xs)
text \<open>
Schedules of \<open>A \<parallel> B\<close> have only \<open>A\<close>- or \<open>B\<close>-actions.
Very similar to \<open>lemma_1_1c\<close>, but it is not checking if every action element
of an \<open>ex\<close> is in \<open>A\<close> or \<open>B\<close>, but after projecting it onto the action
schedule. Of course, this is the same proposition, but we cannot change this
one, when then rather \<open>lemma_1_1c\<close>.
\<close>
lemma sch_actions_in_AorB:
"\s. is_exec_frag (A \ B) (s, xs) \ Forall (\x. x \ act (A \ B)) (filter_act \ xs)"
apply (pair_induct xs simp: is_exec_frag_def Forall_def sforall_def)
text \<open>main case\<close>
apply auto
apply (simp add: trans_of_defs2 actions_asig_comp asig_of_par)
done
subsubsection \<open>Lemmas for \<open>\<Longleftarrow>\<close>\<close>
text \<open>
Filtering actions out of \<open>mkex (sch, exA, exB)\<close> yields the oracle \<open>sch\<close>
structural induction.
\<close>
lemma Mapfst_mkex_is_sch:
"\exA exB s t.
Forall (\<lambda>x. x \<in> act (A \<parallel> B)) sch \<and>
Filter (\<lambda>a. a \<in> act A) \<cdot> sch \<sqsubseteq> filter_act \<cdot> exA \<and>
Filter (\<lambda>a. a \<in> act B) \<cdot> sch \<sqsubseteq> filter_act \<cdot> exB \<longrightarrow>
filter_act \<cdot> (snd (mkex A B sch (s, exA) (t, exB))) = sch"
apply (Seq_induct sch simp: Filter_def Forall_def sforall_def mkex_def)
text \<open>main case: splitting into 4 cases according to \<open>a \<in> A\<close>, \<open>a \<in> B\<close>\<close>
apply auto
text \<open>Case \<open>y \<in> A\<close>, \<open>y \<in> B\<close>\<close>
apply (Seq_case_simp exA)
text \<open>Case \<open>exA = UU\<close>, Case \<open>exA = nil\<close>\<close>
text \<open>
These \<open>UU\<close> and \<open>nil\<close> cases are the only places where the assumption
\<open>filter A sch \<sqsubseteq> f_act exA\<close> is used!
\<open>\<longrightarrow>\<close> to generate a contradiction using \<open>\<not> a \<leadsto> ss \<sqsubseteq> UU nil\<close>,
using theorems \<open>Cons_not_less_UU\<close> and \<open>Cons_not_less_nil\<close>.\<close>
apply (Seq_case_simp exB)
text \<open>Case \<open>exA = a \<leadsto> x\<close>, \<open>exB = b \<leadsto> y\<close>\<close>
text \<open>
Here it is important that @{method Seq_case_simp} uses no \<open>!full!_simp_tac\<close>
for the cons case, as otherwise \<open>mkex_cons_3\<close> would not be rewritten
without use of \<open>rotate_tac\<close>: then tactic would not be generally
applicable.\<close>
apply simp
text \<open>Case \<open>y \<in> A\<close>, \<open>y \<notin> B\<close>\<close>
apply (Seq_case_simp exA)
apply simp
text \<open>Case \<open>y \<notin> A\<close>, \<open>y \<in> B\<close>\<close>
apply (Seq_case_simp exB)
apply simp
text \<open>Case \<open>y \<notin> A\<close>, \<open>y \<notin> B\<close>\<close>
apply (simp add: asig_of_par actions_asig_comp)
done
text \<open>Generalizing the proof above to a proof method:\<close>
ML \<open>
fun mkex_induct_tac ctxt sch exA exB =
EVERY' [
Seq_induct_tac ctxt sch
@{thms Filter_def Forall_def sforall_def mkex_def stutter_def},
asm_full_simp_tac ctxt,
SELECT_GOAL
(safe_tac (Context.raw_transfer (Proof_Context.theory_of ctxt) \<^theory_context>\<open>Fun\<close>)),
Seq_case_simp_tac ctxt exA,
Seq_case_simp_tac ctxt exB,
asm_full_simp_tac ctxt,
Seq_case_simp_tac ctxt exA,
asm_full_simp_tac ctxt,
Seq_case_simp_tac ctxt exB,
asm_full_simp_tac ctxt,
asm_full_simp_tac (ctxt addsimps @{thms asig_of_par actions_asig_comp})]
\<close>
method_setup mkex_induct = \<open>
Scan.lift (Args.embedded -- Args.embedded -- Args.embedded)
>> (fn ((sch, exA), exB) => fn ctxt =>
SIMPLE_METHOD' (mkex_induct_tac ctxt sch exA exB))
\<close>
text \<open>
Projection of \<open>mkex (sch, exA, exB)\<close> onto \<open>A\<close> stutters on \<open>A\<close>
structural induction.
\<close>
lemma stutterA_mkex:
"\exA exB s t.
Forall (\<lambda>x. x \<in> act (A \<parallel> B)) sch \<and>
Filter (\<lambda>a. a \<in> act A) \<cdot> sch \<sqsubseteq> filter_act \<cdot> exA \<and>
Filter (\<lambda>a. a \<in> act B) \<cdot> sch \<sqsubseteq> filter_act \<cdot> exB \<longrightarrow>
stutter (asig_of A) (s, ProjA2 \<cdot> (snd (mkex A B sch (s, exA) (t, exB))))"
by (mkex_induct sch exA exB)
lemma stutter_mkex_on_A:
"Forall (\x. x \ act (A \ B)) sch \
Filter (\<lambda>a. a \<in> act A) \<cdot> sch \<sqsubseteq> filter_act \<cdot> (snd exA) \<Longrightarrow>
Filter (\<lambda>a. a \<in> act B) \<cdot> sch \<sqsubseteq> filter_act \<cdot> (snd exB) \<Longrightarrow>
stutter (asig_of A) (ProjA (mkex A B sch exA exB))"
apply (cut_tac stutterA_mkex)
apply (simp add: stutter_def ProjA_def mkex_def)
apply (erule allE)+
apply (drule mp)
prefer 2 apply (assumption)
apply simp
done
text \<open>
Projection of \<open>mkex (sch, exA, exB)\<close> onto \<open>B\<close> stutters on \<open>B\<close>
structural induction.
\<close>
lemma stutterB_mkex:
"\exA exB s t.
Forall (\<lambda>x. x \<in> act (A \<parallel> B)) sch \<and>
Filter (\<lambda>a. a \<in> act A) \<cdot> sch \<sqsubseteq> filter_act \<cdot> exA \<and>
Filter (\<lambda>a. a \<in> act B) \<cdot> sch \<sqsubseteq> filter_act \<cdot> exB \<longrightarrow>
stutter (asig_of B) (t, ProjB2 \<cdot> (snd (mkex A B sch (s, exA) (t, exB))))"
by (mkex_induct sch exA exB)
lemma stutter_mkex_on_B:
"Forall (\x. x \ act (A \ B)) sch \
Filter (\<lambda>a. a \<in> act A) \<cdot> sch \<sqsubseteq> filter_act \<cdot> (snd exA) \<Longrightarrow>
Filter (\<lambda>a. a \<in> act B) \<cdot> sch \<sqsubseteq> filter_act \<cdot> (snd exB) \<Longrightarrow>
stutter (asig_of B) (ProjB (mkex A B sch exA exB))"
apply (cut_tac stutterB_mkex)
apply (simp add: stutter_def ProjB_def mkex_def)
apply (erule allE)+
apply (drule mp)
prefer 2 apply (assumption)
apply simp
done
text \<open>
Filter of \<open>mkex (sch, exA, exB)\<close> to \<open>A\<close> after projection onto \<open>A\<close> is \<open>exA\<close>,
using \<open>zip \<cdot> (proj1 \<cdot> exA) \<cdot> (proj2 \<cdot> exA)\<close> instead of \<open>exA\<close>,
because of admissibility problems structural induction.
\<close>
lemma filter_mkex_is_exA_tmp:
"\exA exB s t.
Forall (\<lambda>x. x \<in> act (A \<parallel> B)) sch \<and>
Filter (\<lambda>a. a \<in> act A) \<cdot> sch \<sqsubseteq> filter_act \<cdot> exA \<and>
Filter (\<lambda>a. a \<in> act B) \<cdot> sch \<sqsubseteq> filter_act \<cdot> exB \<longrightarrow>
Filter_ex2 (asig_of A) \<cdot> (ProjA2 \<cdot> (snd (mkex A B sch (s, exA) (t, exB)))) =
Zip \<cdot> (Filter (\<lambda>a. a \<in> act A) \<cdot> sch) \<cdot> (Map snd \<cdot> exA)"
by (mkex_induct sch exB exA)
text \<open>
\<open>zip \<cdot> (proj1 \<cdot> y) \<cdot> (proj2 \<cdot> y) = y\<close> (using the lift operations)
lemma for admissibility problems
\<close>
lemma Zip_Map_fst_snd: "Zip \ (Map fst \ y) \ (Map snd \ y) = y"
by (Seq_induct y)
text \<open>
\<open>filter A \<cdot> sch = proj1 \<cdot> ex \<longrightarrow> zip \<cdot> (filter A \<cdot> sch) \<cdot> (proj2 \<cdot> ex) = ex\<close>
lemma for eliminating non admissible equations in assumptions
\<close>
lemma trick_against_eq_in_ass:
"Filter (\a. a \ act AB) \ sch = filter_act \ ex \
ex = Zip \<cdot> (Filter (\<lambda>a. a \<in> act AB) \<cdot> sch) \<cdot> (Map snd \<cdot> ex)"
apply (simp add: filter_act_def)
apply (rule Zip_Map_fst_snd [symmetric])
done
text \<open>
Filter of \<open>mkex (sch, exA, exB)\<close> to \<open>A\<close> after projection onto \<open>A\<close> is \<open>exA\<close>
using the above trick.
\<close>
lemma filter_mkex_is_exA:
"Forall (\a. a \ act (A \ B)) sch \
Filter (\<lambda>a. a \<in> act A) \<cdot> sch = filter_act \<cdot> (snd exA) \<Longrightarrow>
Filter (\<lambda>a. a \<in> act B) \<cdot> sch = filter_act \<cdot> (snd exB) \<Longrightarrow>
Filter_ex (asig_of A) (ProjA (mkex A B sch exA exB)) = exA"
apply (simp add: ProjA_def Filter_ex_def)
apply (pair exA)
apply (pair exB)
apply (rule conjI)
apply (simp (no_asm) add: mkex_def)
apply (simplesubst trick_against_eq_in_ass)
back
apply assumption
apply (simp add: filter_mkex_is_exA_tmp)
done
text \<open>
Filter of \<open>mkex (sch, exA, exB)\<close> to \<open>B\<close> after projection onto \<open>B\<close> is \<open>exB\<close>
using \<open>zip \<cdot> (proj1 \<cdot> exB) \<cdot> (proj2 \<cdot> exB)\<close> instead of \<open>exB\<close>
because of admissibility problems structural induction.
\<close>
lemma filter_mkex_is_exB_tmp:
"\exA exB s t.
Forall (\<lambda>x. x \<in> act (A \<parallel> B)) sch \<and>
Filter (\<lambda>a. a \<in> act A) \<cdot> sch \<sqsubseteq> filter_act \<cdot> exA \<and>
Filter (\<lambda>a. a \<in> act B) \<cdot> sch \<sqsubseteq> filter_act \<cdot> exB \<longrightarrow>
Filter_ex2 (asig_of B) \<cdot> (ProjB2 \<cdot> (snd (mkex A B sch (s, exA) (t, exB)))) =
Zip \<cdot> (Filter (\<lambda>a. a \<in> act B) \<cdot> sch) \<cdot> (Map snd \<cdot> exB)"
(*notice necessary change of arguments exA and exB*)
by (mkex_induct sch exA exB)
text \<open>
Filter of \<open>mkex (sch, exA, exB)\<close> to \<open>A\<close> after projection onto \<open>B\<close> is \<open>exB\<close>
using the above trick.
\<close>
lemma filter_mkex_is_exB:
"Forall (\a. a \ act (A \ B)) sch \
Filter (\<lambda>a. a \<in> act A) \<cdot> sch = filter_act \<cdot> (snd exA) \<Longrightarrow>
Filter (\<lambda>a. a \<in> act B) \<cdot> sch = filter_act \<cdot> (snd exB) \<Longrightarrow>
Filter_ex (asig_of B) (ProjB (mkex A B sch exA exB)) = exB"
apply (simp add: ProjB_def Filter_ex_def)
apply (pair exA)
apply (pair exB)
apply (rule conjI)
apply (simp add: mkex_def)
apply (simplesubst trick_against_eq_in_ass)
back
apply assumption
apply (simp add: filter_mkex_is_exB_tmp)
done
lemma mkex_actions_in_AorB:
\<comment> \<open>\<open>mkex\<close> has only \<open>A\<close>- or \<open>B\<close>-actions\<close>
"\s t exA exB.
Forall (\<lambda>x. x \<in> act (A \<parallel> B)) sch &
Filter (\<lambda>a. a \<in> act A) \<cdot> sch \<sqsubseteq> filter_act \<cdot> exA \<and>
Filter (\<lambda>a. a \<in> act B) \<cdot> sch \<sqsubseteq> filter_act \<cdot> exB \<longrightarrow>
Forall (\<lambda>x. fst x \<in> act (A \<parallel> B)) (snd (mkex A B sch (s, exA) (t, exB)))"
by (mkex_induct sch exA exB)
theorem compositionality_sch:
"sch \ schedules (A \ B) \
Filter (\<lambda>a. a \<in> act A) \<cdot> sch \<in> schedules A \<and>
Filter (\<lambda>a. a \<in> act B) \<cdot> sch \<in> schedules B \<and>
Forall (\<lambda>x. x \<in> act (A \<parallel> B)) sch"
apply (simp add: schedules_def has_schedule_def)
apply auto
text \<open>\<open>\<Longrightarrow>\<close>\<close>
apply (rule_tac x = "Filter_ex (asig_of A) (ProjA ex)" in bexI)
prefer 2
apply (simp add: compositionality_ex)
apply (simp (no_asm) add: Filter_ex_def ProjA_def lemma_2_1a lemma_2_1b)
apply (rule_tac x = "Filter_ex (asig_of B) (ProjB ex)" in bexI)
prefer 2
apply (simp add: compositionality_ex)
apply (simp add: Filter_ex_def ProjB_def lemma_2_1a lemma_2_1b)
apply (simp add: executions_def)
apply (pair ex)
apply (erule conjE)
apply (simp add: sch_actions_in_AorB)
text \<open>\<open>\<Longleftarrow>\<close>\<close>
text \<open>\<open>mkex\<close> is exactly the construction of \<open>exA\<parallel>B\<close> out of \<open>exA\<close>, \<open>exB\<close>,
and the oracle \<open>sch\<close>, we need here\<close>
apply (rename_tac exA exB)
apply (rule_tac x = "mkex A B sch exA exB" in bexI)
text \<open>\<open>mkex\<close> actions are just the oracle\<close>
apply (pair exA)
apply (pair exB)
apply (simp add: Mapfst_mkex_is_sch)
text \<open>\<open>mkex\<close> is an execution -- use compositionality on ex-level\<close>
apply (simp add: compositionality_ex)
apply (simp add: stutter_mkex_on_A stutter_mkex_on_B filter_mkex_is_exB filter_mkex_is_exA)
apply (pair exA)
apply (pair exB)
apply (simp add: mkex_actions_in_AorB)
done
theorem compositionality_sch_modules:
"Scheds (A \ B) = par_scheds (Scheds A) (Scheds B)"
apply (unfold Scheds_def par_scheds_def)
apply (simp add: asig_of_par)
apply (rule set_eqI)
apply (simp add: compositionality_sch actions_of_par)
done
declare compoex_simps [simp del]
declare composch_simps [simp del]
end
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