
diff -r b95d12325b51 -r 2950128b8206 src/HOL/MicroJava/Comp/CorrComp.thy
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/HOL/MicroJava/Comp/CorrComp.thy	Wed Oct 23 16:10:02 2002 +0200
@@ -0,0 +1,1309 @@
+(*  Title:      HOL/MicroJava/Comp/CorrComp.thy
+    ID:         $Id$
+    Author:     Martin Strecker
+    Copyright   GPL 2002
+*)
+
+(* Compiler correctness statement and proof *)
+
+theory CorrComp =  JTypeSafe + LemmasComp:
+
+
+
+(* If no exception is present after evaluation/execution, 
+  none can have been present before *)
+lemma eval_evals_exec_xcpt:
+ "((xs,ex,val,xs') \<in> Eval.eval G \<longrightarrow> gx xs' = None \<longrightarrow> gx xs = None) \<and>
+  ((xs,exs,vals,xs') \<in> Eval.evals G \<longrightarrow> gx xs' = None \<longrightarrow> gx xs = None) \<and>
+  ((xs,st,xs') \<in> Eval.exec G \<longrightarrow> gx xs' = None \<longrightarrow> gx xs = None)"
+by (induct rule: eval_evals_exec.induct, auto)
+
+
+(* instance of eval_evals_exec_xcpt for eval *)
+lemma eval_xcpt: "(xs,ex,val,xs') \<in> Eval.eval G \<Longrightarrow> gx xs' = None \<Longrightarrow> gx xs = None"
+ (is "?H1 \<Longrightarrow> ?H2 \<Longrightarrow> ?T")
+proof-
+  assume h1: ?H1
+  assume h2: ?H2
+  from h1 h2 eval_evals_exec_xcpt show "?T" by simp
+qed
+
+(* instance of eval_evals_exec_xcpt for evals *)
+lemma evals_xcpt: "(xs,exs,vals,xs') \<in> Eval.evals G \<Longrightarrow> gx xs' = None \<Longrightarrow> gx xs = None"
+ (is "?H1 \<Longrightarrow> ?H2 \<Longrightarrow> ?T")
+proof-
+  assume h1: ?H1
+  assume h2: ?H2
+  from h1 h2 eval_evals_exec_xcpt show "?T" by simp
+qed
+
+(* instance of eval_evals_exec_xcpt for exec *)
+lemma exec_xcpt: "(xs,st,xs') \<in> Eval.exec G \<Longrightarrow> gx xs' = None \<Longrightarrow> gx xs = None"
+ (is "?H1 \<Longrightarrow> ?H2 \<Longrightarrow> ?T")
+proof-
+  assume h1: ?H1
+  assume h2: ?H2
+  from h1 h2 eval_evals_exec_xcpt show "?T" by simp
+qed
+
+(**********************************************************************)
+
+theorem exec_all_trans: "\<lbrakk>(exec_all G s0 s1); (exec_all G s1 s2)\<rbrakk> \<Longrightarrow> (exec_all G s0 s2)"
+apply (auto simp: exec_all_def elim: Transitive_Closure.rtrancl_trans)
+done
+
+theorem exec_all_refl: "exec_all G s s"
+by (simp only: exec_all_def, rule rtrancl_refl)
+
+
+theorem exec_instr_in_exec_all:
+  "\<lbrakk> exec_instr i G hp stk lvars C S pc frs =  (None, hp', frs');
+             gis (gmb G C S) ! pc = i\<rbrakk>  \<Longrightarrow>
+       G \<turnstile> (None, hp, (stk, lvars, C, S, pc) # frs) -jvm\<rightarrow> (None, hp', frs')"
+apply (simp only: exec_all_def)
+apply (rule rtrancl_refl [THEN rtrancl_into_rtrancl])
+apply (simp add: gis_def gmb_def)
+apply (case_tac frs', simp+)
+done
+
+theorem exec_all_one_step: "
+  \<lbrakk> gis (gmb G C S) = pre @ (i # post); pc0 = length pre;
+  (exec_instr i G hp0 stk0 lvars0 C S pc0 frs) = 
+  (None, hp1, (stk1,lvars1,C,S, Suc pc0)#frs) \<rbrakk>
+  \<Longrightarrow> 
+  G \<turnstile> (None, hp0, (stk0,lvars0,C,S, pc0)#frs) -jvm\<rightarrow> 
+  (None, hp1, (stk1,lvars1,C,S, Suc pc0)#frs)"
+apply (unfold exec_all_def)
+apply (rule r_into_rtrancl)
+apply (simp add: gis_def gmb_def split_beta)
+done
+
+
+(***********************************************************************)
+
+constdefs
+  progression :: "jvm_prog \<Rightarrow> cname \<Rightarrow> sig \<Rightarrow> 
+                 aheap \<Rightarrow> opstack \<Rightarrow> locvars \<Rightarrow>
+                 bytecode \<Rightarrow>
+                 aheap \<Rightarrow> opstack \<Rightarrow> locvars \<Rightarrow> 
+                 bool"
+  ("{_,_,_} \<turnstile> {_, _, _} >- _ \<rightarrow> {_, _, _}" [61,61,61,61,61,61,90,61,61,61]60)
+  "{G,C,S} \<turnstile> {hp0, os0, lvars0} >- instrs \<rightarrow> {hp1, os1, lvars1} ==
+  \<forall> pre post frs.
+  (gis (gmb G C S) = pre @ instrs @ post) \<longrightarrow>
+   G \<turnstile> (None,hp0,(os0,lvars0,C,S,length pre)#frs) -jvm\<rightarrow>
+       (None,hp1,(os1,lvars1,C,S,(length pre) + (length instrs))#frs)"
+
+
+
+lemma progression_call: 
+  "\<lbrakk> \<forall> pc frs.
+  exec_instr instr G hp0 os0 lvars0 C S pc frs =
+      (None, hp', (os', lvars', C', S', 0) # (fr pc) # frs) \<and> 
+  gis (gmb G C' S') = instrs' @ [Return] \<and> 
+  {G, C', S'} \<turnstile> {hp', os', lvars'} >- instrs' \<rightarrow> {hp'', os'', lvars''}  \<and>
+  exec_instr Return G hp'' os'' lvars'' C' S' (length instrs') 
+                                               ((fr pc) # frs) =
+      (None, hp2, (os2, lvars2, C, S, Suc pc) # frs) \<rbrakk> \<Longrightarrow>
+  {G, C, S} \<turnstile> {hp0, os0, lvars0} >-[instr]\<rightarrow> {hp2,os2,lvars2}"
+apply (simp only: progression_def)
+apply (intro strip)
+apply (drule_tac x="length pre" in spec)
+apply (drule_tac x="frs" in spec)
+apply clarify
+apply (rule exec_all_trans)
+apply (rule exec_instr_in_exec_all) apply simp
+apply simp
+apply (rule exec_all_trans)
+apply (simp only: append_Nil)
+apply (drule_tac x="[]" in spec)
+apply (simp only: list.simps)
+apply blast
+apply (rule exec_instr_in_exec_all)
+apply auto
+done
+
+
+lemma progression_transitive: 
+  "\<lbrakk> instrs_comb = instrs0 @ instrs1; 
+  {G, C, S} \<turnstile> {hp0, os0, lvars0} >- instrs0 \<rightarrow> {hp1, os1, lvars1};
+  {G, C, S} \<turnstile> {hp1, os1, lvars1} >- instrs1 \<rightarrow> {hp2, os2, lvars2} \<rbrakk>
+  \<Longrightarrow>
+  {G, C, S} \<turnstile> {hp0, os0, lvars0} >- instrs_comb \<rightarrow> {hp2, os2, lvars2}"
+apply (simp only: progression_def)
+apply (intro strip)
+apply (rule_tac "s1.0" = "Norm (hp1, (os1, lvars1, C, S, 
+                          length pre + length instrs0) # frs)"  
+       in exec_all_trans)
+apply (simp only: append_assoc)
+apply (erule thin_rl, erule thin_rl)
+apply (drule_tac x="pre @ instrs0" in spec)
+apply (simp add: add_assoc)
+done
+
+lemma progression_refl: 
+  "{G, C, S} \<turnstile> {hp0, os0, lvars0} >- [] \<rightarrow> {hp0, os0, lvars0}"
+apply (simp add: progression_def)
+apply (intro strip)
+apply (rule exec_all_refl)
+done
+
+lemma progression_one_step: "
+  \<forall> pc frs. 
+  (exec_instr i G hp0 os0 lvars0 C S pc frs) = 
+  (None, hp1, (os1,lvars1,C,S, Suc pc)#frs)
+  \<Longrightarrow> {G, C, S} \<turnstile> {hp0, os0, lvars0} >- [i] \<rightarrow> {hp1, os1, lvars1}"
+apply (unfold progression_def)
+apply (intro strip)
+apply simp
+apply (rule exec_all_one_step)
+apply auto
+done
+
+(*****)
+constdefs
+  jump_fwd :: "jvm_prog \<Rightarrow> cname \<Rightarrow> sig \<Rightarrow> 
+                 aheap \<Rightarrow> locvars \<Rightarrow> opstack \<Rightarrow> opstack \<Rightarrow> 
+                 instr \<Rightarrow> bytecode \<Rightarrow> bool"
+  "jump_fwd G C S hp lvars os0 os1 instr instrs ==
+  \<forall> pre post frs.
+  (gis (gmb G C S) = pre @ instr # instrs @ post) \<longrightarrow>
+   exec_all G (None,hp,(os0,lvars,C,S, length pre)#frs)
+    (None,hp,(os1,lvars,C,S,(length pre) + (length instrs) + 1)#frs)"
+
+
+lemma jump_fwd_one_step:
+  "\<forall> pc frs.
+  exec_instr instr G hp os0 lvars C S pc frs = 
+    (None, hp, (os1, lvars, C, S, pc + (length instrs) + 1)#frs)
+  \<Longrightarrow> jump_fwd G C S hp lvars os0 os1 instr instrs"
+apply (unfold jump_fwd_def)
+apply (intro strip)
+apply (rule exec_instr_in_exec_all)
+apply auto
+done
+
+
+lemma jump_fwd_progression_aux: 
+  "\<lbrakk> instrs_comb = instr # instrs0 @ instrs1; 
+     jump_fwd G C S hp lvars os0 os1 instr instrs0;
+     {G, C, S} \<turnstile> {hp, os1, lvars} >- instrs1 \<rightarrow> {hp2, os2, lvars2} \<rbrakk> 
+  \<Longrightarrow> {G, C, S} \<turnstile> {hp, os0, lvars} >- instrs_comb \<rightarrow> {hp2, os2, lvars2}"
+apply (simp only: progression_def jump_fwd_def)
+apply (intro strip)
+apply (rule_tac "s1.0" = "Norm(hp, (os1, lvars, C, S, length pre + length instrs0 + 1) # frs)" in exec_all_trans)
+apply (simp only: append_assoc)
+apply (subgoal_tac "pre @ (instr # instrs0 @ instrs1) @ post = pre @ instr # instrs0 @ (instrs1 @ post)")
+apply blast
+apply simp
+apply (erule thin_rl, erule thin_rl)
+apply (drule_tac x="pre @ instr # instrs0" in spec)
+apply (simp add: add_assoc)
+done
+
+
+lemma jump_fwd_progression:
+  "\<lbrakk> instrs_comb = instr # instrs0 @ instrs1; 
+  \<forall> pc frs.
+  exec_instr instr G hp os0 lvars C S pc frs = 
+    (None, hp, (os1, lvars, C, S, pc + (length instrs0) + 1)#frs);
+  {G, C, S} \<turnstile> {hp, os1, lvars} >- instrs1 \<rightarrow> {hp2, os2, lvars2} \<rbrakk> 
+  \<Longrightarrow> {G, C, S}  \<turnstile> {hp, os0, lvars} >- instrs_comb \<rightarrow> {hp2, os2, lvars2}"
+apply (rule jump_fwd_progression_aux)
+apply assumption
+apply (rule jump_fwd_one_step) apply assumption+
+done
+
+
+(* note: instrs and instr reversed wrt. jump_fwd *)
+constdefs
+  jump_bwd :: "jvm_prog \<Rightarrow> cname \<Rightarrow> sig \<Rightarrow> 
+                 aheap \<Rightarrow> locvars \<Rightarrow> opstack \<Rightarrow> opstack \<Rightarrow> 
+                 bytecode \<Rightarrow> instr \<Rightarrow> bool"
+  "jump_bwd G C S hp lvars os0 os1 instrs instr ==
+  \<forall> pre post frs.
+  (gis (gmb G C S) = pre @ instrs @ instr # post) \<longrightarrow>
+   exec_all G (None,hp,(os0,lvars,C,S, (length pre) + (length instrs))#frs)
+    (None,hp,(os1,lvars,C,S, (length pre))#frs)"
+
+
+lemma jump_bwd_one_step:
+  "\<forall> pc frs.
+  exec_instr instr G hp os0 lvars C S (pc + (length instrs)) frs = 
+    (None, hp, (os1, lvars, C, S, pc)#frs)
+  \<Longrightarrow> 
+  jump_bwd G C S hp lvars os0 os1 instrs instr"
+apply (unfold jump_bwd_def)
+apply (intro strip)
+apply (rule exec_instr_in_exec_all)
+apply auto
+done
+
+lemma jump_bwd_progression: 
+  "\<lbrakk> instrs_comb = instrs @ [instr]; 
+  {G, C, S} \<turnstile> {hp0, os0, lvars0} >- instrs \<rightarrow> {hp1, os1, lvars1};
+  jump_bwd G C S hp1 lvars1 os1 os2 instrs instr;
+  {G, C, S} \<turnstile> {hp1, os2, lvars1} >- instrs_comb \<rightarrow> {hp3, os3, lvars3} \<rbrakk> 
+  \<Longrightarrow> {G, C, S}  \<turnstile> {hp0, os0, lvars0} >- instrs_comb \<rightarrow> {hp3, os3, lvars3}"
+apply (simp only: progression_def jump_bwd_def)
+apply (intro strip)
+apply (rule exec_all_trans, force)
+apply (rule exec_all_trans, force)
+apply (rule exec_all_trans, force)
+apply simp
+apply (rule exec_all_refl)
+done
+
+
+(**********************************************************************)
+
+(* class C with signature S is defined in program G *)
+constdefs class_sig_defined :: "'c prog \<Rightarrow> cname \<Rightarrow> sig \<Rightarrow> bool"
+  "class_sig_defined G C S == 
+  is_class G C \<and> (\<exists> D rT mb. (method (G, C) S = Some (D, rT, mb)))"
+
+
+(* The environment of a java method body 
+  (characterized by class and signature) *)
+constdefs env_of_jmb :: "java_mb prog \<Rightarrow> cname \<Rightarrow> sig \<Rightarrow> java_mb env"
+  "env_of_jmb G C S == 
+  (let (mn,pTs) = S;
+       (D,rT,(pns,lvars,blk,res)) = the(method (G, C) S) in
+  (G,map_of lvars(pns[\<mapsto>]pTs)(This\<mapsto>Class C)))"
+
+lemma env_of_jmb_fst [simp]: "fst (env_of_jmb G C S) = G"
+by (simp add: env_of_jmb_def split_beta)
+
+
+(**********************************************************************)
+
+
+(* ### to be moved to one of the J/* files *)
+
+lemma method_preserves [rule_format (no_asm)]:
+  "\<lbrakk> wf_prog wf_mb G; is_class G C; 
+  \<forall> S rT mb. \<forall> cn \<in> fst ` set G. wf_mdecl wf_mb G cn (S,rT,mb)  \<longrightarrow> (P cn S (rT,mb))\<rbrakk>
+ \<Longrightarrow> \<forall> D. 
+  method (G, C) S = Some (D, rT, mb) \<longrightarrow> (P D S (rT,mb))"
+
+apply (frule WellForm.wf_subcls1)
+apply (rule subcls1_induct, assumption, assumption)
+
+apply (intro strip)
+apply ((drule spec)+, drule_tac x="Object" in bspec)
+apply (simp add: wf_prog_def wf_syscls_def)
+apply (subgoal_tac "D=Object") apply simp
+apply (drule mp)
+apply (frule_tac C=Object in method_wf_mdecl)
+ apply simp apply assumption apply simp apply assumption apply simp
+
+apply (subst method_rec) apply simp
+apply force
+apply assumption
+apply (simp only: override_def)
+apply (split option.split)
+apply (rule conjI)
+apply force
+apply (intro strip)
+apply (frule_tac
+  "P1.0" = "wf_mdecl wf_mb G Ca" and
+  "P2.0" = "%(S, (Da, rT, mb)). P Da S (rT, mb)" in map_of_map_prop)
+apply (force simp: wf_cdecl_def)
+
+apply clarify
+
+apply (simp only: class_def)
+apply (drule map_of_SomeD)+
+apply (frule_tac A="set G" and f=fst in imageI, simp)
+apply blast
+apply simp
+done
+
+
+lemma method_preserves_length:
+  "\<lbrakk> wf_java_prog G; is_class G C; 
+  method (G, C) (mn,pTs) = Some (D, rT, pns, lvars, blk, res)\<rbrakk>
+ \<Longrightarrow> length pns = length pTs"
+apply (frule_tac 
+  P="%D (mn,pTs) (rT, pns, lvars, blk, res). length pns = length pTs"
+  in method_preserves)
+apply (auto simp: wf_mdecl_def wf_java_mdecl_def)
+done
+
+(**********************************************************************)
+
+(* required for lemma wtpd_expr_call *)
+lemma ty_exprs_length [simp]: "(E\<turnstile>es[::]Ts \<longrightarrow> length es = length Ts)"
+apply (subgoal_tac "(E\<turnstile>e::T \<longrightarrow> True) \<and> (E\<turnstile>es[::]Ts \<longrightarrow> length es = length Ts) \<and> (E\<turnstile>s\<surd> \<longrightarrow> True)")
+apply blast
+apply (rule ty_expr_ty_exprs_wt_stmt.induct)
+apply auto
+done
+
+constdefs wtpd_expr :: "java_mb env \<Rightarrow> expr \<Rightarrow> bool"
+  "wtpd_expr E e == (\<exists> T. E\<turnstile>e :: T)"
+  wtpd_exprs :: "java_mb env \<Rightarrow> (expr list) \<Rightarrow> bool"
+  "wtpd_exprs E e == (\<exists> T. E\<turnstile>e [::] T)"
+  wtpd_stmt :: "java_mb env \<Rightarrow> stmt \<Rightarrow> bool" 
+  "wtpd_stmt E c == (E\<turnstile>c \<surd>)"
+
+lemma wtpd_expr_newc: "wtpd_expr E (NewC C) \<Longrightarrow> is_class (prg E) C"
+by (simp only: wtpd_expr_def, erule exE, erule ty_expr.cases, auto)
+
+lemma wtpd_expr_cast: "wtpd_expr E (Cast cn e) \<Longrightarrow> (wtpd_expr E e)"
+by (simp only: wtpd_expr_def, erule exE, erule ty_expr.cases, auto)
+
+lemma wtpd_expr_lacc: "\<lbrakk> wtpd_expr (env_of_jmb G C S) (LAcc vn);
+  class_sig_defined G C S \<rbrakk>
+  \<Longrightarrow> vn \<in> set (gjmb_plns (gmb G C S)) \<or> vn = This"
+apply (simp only: wtpd_expr_def env_of_jmb_def class_sig_defined_def galldefs)
+apply clarify
+apply (case_tac S)
+apply simp
+apply (erule ty_expr.cases)
+apply (auto dest: map_upds_SomeD map_of_SomeD fst_in_set_lemma)
+apply (drule map_upds_SomeD)
+apply (erule disjE)
+  apply assumption
+  apply (drule map_of_SomeD) apply (auto dest: fst_in_set_lemma)
+done
+
+lemma wtpd_expr_lass: "wtpd_expr E (vn::=e)
+  \<Longrightarrow> (vn \<noteq> This) & (wtpd_expr E (LAcc vn)) & (wtpd_expr E e)"
+by (simp only: wtpd_expr_def, erule exE, erule ty_expr.cases, auto)
+
+lemma wtpd_expr_facc: "wtpd_expr E ({fd}a..fn) 
+  \<Longrightarrow> (wtpd_expr E a)"
+by (simp only: wtpd_expr_def, erule exE, erule ty_expr.cases, auto)
+
+lemma wtpd_expr_fass: "wtpd_expr E ({fd}a..fn:=v) 
+  \<Longrightarrow> (wtpd_expr E ({fd}a..fn)) & (wtpd_expr E v)"
+by (simp only: wtpd_expr_def, erule exE, erule ty_expr.cases, auto)
+
+
+lemma wtpd_expr_binop: "wtpd_expr E (BinOp bop e1 e2)
+  \<Longrightarrow> (wtpd_expr E e1) & (wtpd_expr E e2)"
+by (simp only: wtpd_expr_def, erule exE, erule ty_expr.cases, auto)
+
+lemma wtpd_exprs_cons: "wtpd_exprs E (e # es)
+  \<Longrightarrow> (wtpd_expr E e) & (wtpd_exprs E es)"
+by (simp only: wtpd_exprs_def wtpd_expr_def, erule exE, erule ty_exprs.cases, auto)
+
+lemma wtpd_stmt_expr: "wtpd_stmt E (Expr e) \<Longrightarrow> (wtpd_expr E e)"
+by (simp only: wtpd_stmt_def wtpd_expr_def, erule wt_stmt.cases, auto)
+
+lemma wtpd_stmt_comp: "wtpd_stmt E (s1;; s2) \<Longrightarrow> 
+   (wtpd_stmt E s1) &  (wtpd_stmt E s2)"
+by (simp only: wtpd_stmt_def wtpd_expr_def, erule wt_stmt.cases, auto)
+
+lemma wtpd_stmt_cond: "wtpd_stmt E (If(e) s1 Else s2) \<Longrightarrow>
+   (wtpd_expr E e) & (wtpd_stmt E s1) &  (wtpd_stmt E s2)
+  & (E\<turnstile>e::PrimT Boolean)"
+by (simp only: wtpd_stmt_def wtpd_expr_def, erule wt_stmt.cases, auto)
+
+lemma wtpd_stmt_loop: "wtpd_stmt E (While(e) s) \<Longrightarrow>
+   (wtpd_expr E e) & (wtpd_stmt E s) & (E\<turnstile>e::PrimT Boolean)"
+by (simp only: wtpd_stmt_def wtpd_expr_def, erule wt_stmt.cases, auto)
+
+lemma wtpd_expr_call: "wtpd_expr E ({C}a..mn({pTs'}ps))
+  \<Longrightarrow> (wtpd_expr E a) & (wtpd_exprs E ps) 
+  & (length ps = length pTs') & (E\<turnstile>a::Class C)
+  & (\<exists> pTs md rT. 
+       E\<turnstile>ps[::]pTs & max_spec (prg E) C (mn, pTs) = {((md,rT),pTs')})"
+apply (simp only: wtpd_expr_def wtpd_exprs_def)
+apply (erule exE)
+apply (ind_cases "E \<turnstile> {C}a..mn( {pTs'}ps) :: T")
+apply (auto simp: max_spec_preserves_length)
+done
+
+lemma wtpd_blk: 
+  "\<lbrakk> method (G, D) (md, pTs) = Some (D, rT, (pns, lvars, blk, res)); 
+  wf_prog wf_java_mdecl G; is_class G D \<rbrakk>
+ \<Longrightarrow> wtpd_stmt (env_of_jmb G D (md, pTs)) blk"
+apply (simp add: wtpd_stmt_def env_of_jmb_def)
+apply (frule_tac P="%D (md, pTs) (rT, (pns, lvars, blk, res)). (G, map_of lvars(pns[\<mapsto>]pTs)(This\<mapsto>Class D)) \<turnstile> blk \<surd> " in method_preserves)
+apply (auto simp: wf_mdecl_def wf_java_mdecl_def)
+done
+
+lemma wtpd_res: 
+  "\<lbrakk> method (G, D) (md, pTs) = Some (D, rT, (pns, lvars, blk, res)); 
+  wf_prog wf_java_mdecl G; is_class G D \<rbrakk>
+ \<Longrightarrow> wtpd_expr (env_of_jmb G D (md, pTs)) res"
+apply (simp add: wtpd_expr_def env_of_jmb_def)
+apply (frule_tac P="%D (md, pTs) (rT, (pns, lvars, blk, res)). \<exists>T. (G, map_of lvars(pns[\<mapsto>]pTs)(This\<mapsto>Class D)) \<turnstile> res :: T " in method_preserves)
+apply (auto simp: wf_mdecl_def wf_java_mdecl_def)
+done
+
+
+(**********************************************************************)
+
+
+(* Is there a more elegant proof? *)
+lemma evals_preserves_length:
+  "G\<turnstile> xs -es[\<succ>]vs-> (None, s) \<Longrightarrow> length es = length vs"
+apply (subgoal_tac 
+  "\<forall> xs'. (G \<turnstile> xk -xj\<succ>xi-> xh \<longrightarrow> True) & 
+  (G\<turnstile> xs -es[\<succ>]vs-> xs' \<longrightarrow>  (\<exists> s. (xs' = (None, s))) \<longrightarrow> 
+  length es = length vs) &
+  ((xc, xb, xa) \<in> Eval.exec G \<longrightarrow> True)")
+apply blast
+apply (rule allI)
+apply (rule Eval.eval_evals_exec.induct)
+apply auto
+done
+
+(***********************************************************************)
+
+(* required for translation of BinOp *)
+
+
+lemma progression_Eq : "{G, C, S} \<turnstile>
+  {hp, (v2 # v1 # os), lvars} 
+  >- [Ifcmpeq 3, LitPush (Bool False), Goto 2, LitPush (Bool True)] \<rightarrow>
+  {hp, (Bool (v1 = v2) # os), lvars}"
+apply (case_tac "v1 = v2")
+
+(* case v1 = v2 *)
+apply (rule_tac "instrs1.0" = "[LitPush (Bool True)]" in jump_fwd_progression)
+apply (auto simp: NatBin.nat_add_distrib)
+apply (rule progression_one_step) apply simp
+
+(* case v1 \<noteq> v2 *)
+apply (rule progression_one_step [THEN HOL.refl [THEN progression_transitive], simplified])
+apply auto
+apply (rule progression_one_step [THEN HOL.refl [THEN progression_transitive], simplified]) 
+apply auto
+apply (rule_tac "instrs1.0" = "[]" in jump_fwd_progression)
+apply (auto simp: NatBin.nat_add_distrib intro: progression_refl)
+done
+
+
+(**********************************************************************)
+
+
+(* to avoid automatic pair splits *)
+
+declare split_paired_All [simp del] split_paired_Ex [simp del]
+ML_setup {*
+simpset_ref() := simpset() delloop "split_all_tac"
+*}
+
+lemma distinct_method: "\<lbrakk> wf_java_prog G; is_class G C; 
+  method (G, C) S = Some (D, rT, pns, lvars, blk, res) \<rbrakk> \<Longrightarrow> 
+  distinct (gjmb_plns (gmb G C S))"
+apply (frule method_wf_mdecl [THEN conjunct2],  assumption, assumption)
+apply (case_tac S)
+apply (simp add: wf_mdecl_def wf_java_mdecl_def galldefs distinct_append)
+apply (simp add: unique_def map_of_in_set)
+apply blast
+done
+
+lemma distinct_method_if_class_sig_defined : 
+  "\<lbrakk> wf_java_prog G; class_sig_defined G C S \<rbrakk> \<Longrightarrow> 
+  distinct (gjmb_plns (gmb G C S))"
+by (auto intro: distinct_method simp: class_sig_defined_def)
+
+
+lemma method_yields_wf_java_mdecl: "\<lbrakk> wf_java_prog G; is_class G C;
+  method (G, C) S = Some (D, rT, pns, lvars, blk, res) \<rbrakk>  \<Longrightarrow> 
+  wf_java_mdecl G D (S,rT,(pns,lvars,blk,res))"
+apply (frule method_wf_mdecl)
+apply (auto simp: wf_mdecl_def)
+done
+
+(**********************************************************************)
+
+
+lemma progression_lvar_init_aux [rule_format (no_asm)]: "
+  \<forall> zs prfx lvals lvars0. 
+  lvars0 =  (zs @ lvars) \<longrightarrow>
+  (disjoint_varnames pns lvars0 \<longrightarrow>
+  (length lvars = length lvals) \<longrightarrow> 
+  (Suc(length pns + length zs) = length prfx) \<longrightarrow> 
+   ({cG, D, S} \<turnstile> 
+    {h, os, (prfx @ lvals)}
+    >- (concat (map (compInit (pns, lvars0, blk, res)) lvars)) \<rightarrow>
+    {h, os, (prfx @ (map (\<lambda>p. (default_val (snd p))) lvars))}))"
+apply simp
+apply (induct lvars)
+apply (clarsimp, rule progression_refl)
+apply (intro strip)
+apply (case_tac lvals) apply simp
+apply (simp (no_asm_simp) )
+
+apply (rule_tac "lvars1.0" = "(prfx @ [default_val (snd a)]) @ lista" in progression_transitive, rule HOL.refl)
+apply (case_tac a) apply (simp (no_asm_simp) add: compInit_def)
+apply (rule_tac "instrs0.0" = "[load_default_val b]" in progression_transitive, simp)
+apply (rule progression_one_step)
+apply (simp (no_asm_simp) add: load_default_val_def)
+apply (rule conjI, simp)+ apply (rule HOL.refl)
+
+apply (rule progression_one_step)
+apply (simp (no_asm_simp))
+apply (rule conjI, simp)+
+apply (simp add: index_of_var2)
+apply (drule_tac x="zs @ [a]" in spec) (* instantiate zs *)
+apply (drule mp, simp)
+apply (drule_tac x="(prfx @ [default_val (snd a)])" in spec) (* instantiate prfx *)
+apply auto
+done
+
+lemma progression_lvar_init [rule_format (no_asm)]: 
+  "\<lbrakk> wf_java_prog G; is_class G C;
+  method (G, C) S = Some (D, rT, pns, lvars, blk, res) \<rbrakk> \<Longrightarrow> 
+  length pns = length pvs \<longrightarrow> 
+  (\<forall> lvals. 
+  length lvars = length lvals \<longrightarrow>
+   {cG, D, S} \<turnstile>
+   {h, os, (a' # pvs @ lvals)}
+   >- (compInitLvars (pns, lvars, blk, res) lvars) \<rightarrow>
+   {h, os, (locvars_xstate G C S (Norm (h, init_vars lvars(pns[\<mapsto>]pvs)(This\<mapsto>a'))))})"
+apply (simp only: compInitLvars_def)
+apply (frule method_yields_wf_java_mdecl, assumption, assumption)
+
+apply (simp only: wf_java_mdecl_def)
+apply (subgoal_tac "(\<forall>y\<in>set pns. y \<notin> set (map fst lvars))")
+apply (simp add: init_vars_def locvars_xstate_def locvars_locals_def galldefs unique_def split_def map_of_map_as_map_upd)
+apply (intro strip)
+apply (simp (no_asm_simp) only: append_Cons [THEN sym])
+apply (rule progression_lvar_init_aux)
+apply (auto simp: unique_def map_of_in_set disjoint_varnames_def)
+done
+
+
+
+
+
+
+
+
+
+(**********************************************************************)
+
+constdefs
+  state_ok :: "java_mb env \<Rightarrow> xstate \<Rightarrow> bool"
+  "state_ok E xs == xs::\<preceq>E"
+
+
+lemma state_ok_eval: "\<lbrakk>state_ok E xs; wf_java_prog (prg E); wtpd_expr E e;
+  (prg E)\<turnstile>xs -e\<succ>v -> xs'\<rbrakk> \<Longrightarrow>  state_ok E xs'"
+apply (simp only: state_ok_def wtpd_expr_def)
+apply (erule exE)
+apply (case_tac xs', case_tac xs, simp only:)
+apply (rule eval_type_sound [THEN conjunct1])
+apply (rule HOL.refl)
+apply assumption
+apply (subgoal_tac "fst E \<turnstile> (gx xs, gs xs) -e\<succ>v-> (gx xs', gs xs')")
+apply assumption
+apply (auto simp: gx_def gs_def)
+done
+
+(* to be moved into JTypeSafe.thy *)
+lemma evals_type_sound: "!!E s s'.  
+  [| G\<turnstile>(x,s) -es[\<succ>]vs -> (x',s'); G=prg E; wf_java_prog G; (x,s)::\<preceq>E; E\<turnstile>es[::]Ts |]  
+  ==> (x',s')::\<preceq>E \<and> (x'=None --> list_all2 (conf G (heap s')) vs Ts)"
+apply( simp (no_asm_simp) only: split_tupled_all)
+apply (drule eval_evals_exec_type_sound 
+             [THEN conjunct2, THEN conjunct1, THEN mp, THEN spec, THEN mp])
+apply auto
+done
+
+lemma state_ok_evals: "\<lbrakk>state_ok E xs; wf_java_prog (prg E); wtpd_exprs E es;
+  (xs,es,vs,xs') \<in> Eval.evals (prg E)\<rbrakk> \<Longrightarrow>  state_ok E xs'"
+apply (simp only: state_ok_def wtpd_exprs_def)
+apply (erule exE)
+apply (case_tac xs) apply (case_tac xs') apply (simp only:)
+apply (rule evals_type_sound [THEN conjunct1])
+apply (auto simp: gx_def gs_def)
+done
+
+lemma state_ok_exec: "\<lbrakk>state_ok E xs; wf_java_prog (prg E); wtpd_stmt E st;
+  (xs,st,xs') \<in> Eval.exec (prg E)\<rbrakk> \<Longrightarrow>  state_ok E xs'"
+apply (simp only: state_ok_def wtpd_stmt_def)
+apply (case_tac xs', case_tac xs, simp only:)
+apply (rule exec_type_sound)
+apply (rule HOL.refl)
+apply assumption
+apply (subgoal_tac "((gx xs, gs xs), st, (gx xs', gs xs')) \<in> Eval.exec (fst E)")
+apply assumption
+apply (auto simp: gx_def gs_def)
+done
+
+
+lemma state_ok_init: 
+  "\<lbrakk> wf_java_prog G; state_ok (env_of_jmb G C S) (x, h, l); 
+  is_class G dynT;
+  method (G, dynT) (mn, pTs) = Some (md, rT, pns, lvars, blk, res);
+  list_all2 (conf G h) pvs pTs; G,h \<turnstile> a' ::\<preceq> Class md\<rbrakk>
+\<Longrightarrow>
+state_ok (env_of_jmb G md (mn, pTs)) (np a' x, h, init_vars lvars(pns[\<mapsto>]pvs)(This\<mapsto>a'))"
+apply (frule method_in_md [THEN conjunct2], assumption+)
+apply (frule method_yields_wf_java_mdecl, assumption, assumption)
+apply (simp add: state_ok_def env_of_jmb_def gs_def conforms_def split_beta)
+apply (simp add: wf_java_mdecl_def)
+apply (rule conjI)
+apply (rule lconf_ext)
+apply (rule lconf_ext_list)
+apply (rule lconf_init_vars)
+apply (auto dest: Ball_set_table)
+apply (simp add: np_def xconf_raise_if)
+done
+
+
+lemma ty_exprs_list_all2 [rule_format (no_asm)]: 
+  "(\<forall> Ts. (E \<turnstile> es [::] Ts) = list_all2 (\<lambda>e T. E \<turnstile> e :: T) es Ts)"
+apply (rule list.induct)
+apply simp
+apply (rule allI)
+apply (rule iffI)
+  apply (ind_cases "E \<turnstile> [] [::] Ts", assumption)
+  apply simp apply (rule WellType.Nil)
+apply (simp add: list_all2_Cons1)
+apply (rule allI)
+apply (rule iffI)
+  apply (rename_tac a exs Ts)
+  apply (ind_cases "E \<turnstile> a # exs  [::] Ts") apply blast
+  apply (auto intro: WellType.Cons)
+done
+
+
+lemma conf_bool: "G,h \<turnstile> v::\<preceq>PrimT Boolean \<Longrightarrow> \<exists> b. v = Bool b"
+apply (simp add: conf_def)
+apply (erule exE)
+apply (case_tac v)
+apply (auto elim: widen.cases)
+done
+
+
+lemma class_expr_is_class: "\<lbrakk>E \<turnstile> e :: Class C; wf_prog wf_mb (prg E)\<rbrakk> 
+  \<Longrightarrow> is_class (prg E) C"
+by (case_tac E, auto dest: ty_expr_is_type)
+
+
+lemma max_spec_widen: "max_spec G C (mn, pTs) = {((md,rT),pTs')} \<Longrightarrow> 
+  list_all2 (\<lambda> T T'. G \<turnstile> T \<preceq> T') pTs pTs'"
+by (blast dest: singleton_in_set max_spec2appl_meths appl_methsD)
+
+
+lemma eval_conf: "\<lbrakk>G \<turnstile> s -e\<succ>v-> s'; wf_java_prog G; state_ok E s;
+  E\<turnstile>e::T; gx s' = None; prg E = G \<rbrakk> 
+  \<Longrightarrow> G,gh s'\<turnstile>v::\<preceq>T"
+apply (simp add: gh_def)
+apply (rule_tac x2="fst s" and "s2"="snd s"and "x'2"="fst s'"  
+  in eval_type_sound [THEN conjunct2 [THEN mp], simplified])
+apply (rule sym) apply assumption
+apply assumption
+apply (simp (no_asm_use) add: surjective_pairing [THEN sym])
+apply (simp only: state_ok_def gs_def)
+apply (case_tac s, simp)
+apply assumption
+apply (simp add: gx_def)
+done
+
+lemma evals_preserves_conf:
+  "\<lbrakk> G\<turnstile> s -es[\<succ>]vs-> s'; G,gh s \<turnstile> t ::\<preceq> T; E \<turnstile>es[::]Ts;
+  wf_java_prog G; state_ok E s; 
+  prg E = G \<rbrakk> \<Longrightarrow> G,gh s' \<turnstile> t ::\<preceq> T"
+apply (subgoal_tac "gh s\<le>| gh s'")
+apply (frule conf_hext, assumption, assumption)
+apply (frule eval_evals_exec_type_sound [THEN conjunct2 [THEN conjunct1 [THEN mp]]]) 
+apply (subgoal_tac "G \<turnstile> (gx s, (gh s, gl s)) -es[\<succ>]vs-> (gx s', (gh s', gl s'))")
+apply assumption
+apply (simp add: gx_def gh_def gl_def surjective_pairing [THEN sym])
+apply (case_tac E)
+apply (simp add: gx_def gs_def gh_def gl_def state_ok_def
+  surjective_pairing [THEN sym])
+done
+
+lemma eval_of_class: "\<lbrakk> G \<turnstile> s -e\<succ>a'-> s'; E \<turnstile> e :: Class C; 
+  wf_java_prog G; state_ok E s; gx s'=None; a' \<noteq> Null; G=prg E\<rbrakk>
+  \<Longrightarrow> (\<exists> lc. a' = Addr lc)"
+apply (case_tac s, case_tac s', simp)
+apply (frule eval_type_sound, (simp add: state_ok_def gs_def)+)
+apply (case_tac a')
+apply (auto simp: conf_def)
+done
+
+
+lemma dynT_subcls: 
+  "\<lbrakk> a' \<noteq> Null; G,h\<turnstile>a'::\<preceq> Class C; dynT = fst (the (h (the_Addr a')));
+  is_class G dynT; wf_prog wf_mb G \<rbrakk> \<Longrightarrow> G\<turnstile>dynT \<preceq>C C"
+apply (case_tac "C = Object")
+apply (simp, rule subcls_C_Object, assumption+)
+apply (frule non_np_objD, auto)
+done
+
+
+lemma method_defined: "\<lbrakk> 
+  m = the (method (G, dynT) (mn, pTs)); 
+  dynT = fst (the (h a)); is_class G dynT; wf_java_prog G; 
+  a' \<noteq> Null; G,h\<turnstile>a'::\<preceq> Class C; a = the_Addr a';
+  \<exists>pTsa md rT. max_spec G C (mn, pTsa) = {((md, rT), pTs)} \<rbrakk>
+\<Longrightarrow> (method (G, dynT) (mn, pTs)) = Some m"
+apply (erule exE)+
+apply (drule singleton_in_set, drule max_spec2appl_meths)
+apply (simp add: appl_methds_def)
+apply ((erule exE)+, (erule conjE)+, (erule exE)+)
+apply (drule widen_methd)
+apply assumption
+apply (rule dynT_subcls, assumption+, simp, assumption+)
+apply (erule exE)+ apply simp
+done
+
+
+
+(**********************************************************************)
+
+
+(* 1. any difference between locvars_xstate \<dots> and L ??? *)
+(* 2. possibly skip env_of_jmb ??? *)
+theorem compiler_correctness: 
+  "wf_java_prog G \<Longrightarrow>
+  ((xs,ex,val,xs') \<in> Eval.eval G \<longrightarrow>
+  gx xs = None \<longrightarrow> gx xs' = None \<longrightarrow>
+  (\<forall> os CL S.
+  (class_sig_defined G CL S) \<longrightarrow> 
+  (wtpd_expr (env_of_jmb G CL S) ex) \<longrightarrow>
+  (state_ok (env_of_jmb G CL S) xs) \<longrightarrow>
+  ( {TranslComp.comp G, CL, S} \<turnstile>
+    {gh xs, os, (locvars_xstate G CL S xs)}
+    >- (compExpr (gmb G CL S) ex) \<rightarrow>
+    {gh xs', val#os, locvars_xstate G CL S xs'}))) \<and> 
+
+ ((xs,exs,vals,xs') \<in> Eval.evals G \<longrightarrow>
+  gx xs = None \<longrightarrow> gx xs' = None \<longrightarrow>
+  (\<forall> os CL S.
+  (class_sig_defined G CL S) \<longrightarrow> 
+  (wtpd_exprs (env_of_jmb G CL S) exs) \<longrightarrow>
+  (state_ok (env_of_jmb G CL S) xs) \<longrightarrow>
+  ( {TranslComp.comp G, CL, S} \<turnstile>
+    {gh xs, os, (locvars_xstate G CL S xs)}
+    >- (compExprs (gmb G CL S) exs) \<rightarrow>
+    {gh xs', (rev vals)@os, (locvars_xstate G CL S xs')}))) \<and> 
+
+  ((xs,st,xs') \<in> Eval.exec G \<longrightarrow>
+   gx xs = None \<longrightarrow> gx xs' = None \<longrightarrow>
+  (\<forall> os CL S.
+  (class_sig_defined G CL S) \<longrightarrow> 
+  (wtpd_stmt (env_of_jmb G CL S) st) \<longrightarrow>
+  (state_ok (env_of_jmb G CL S) xs) \<longrightarrow>
+  ( {TranslComp.comp G, CL, S} \<turnstile>
+    {gh xs, os, (locvars_xstate G CL S xs)}
+    >- (compStmt (gmb G CL S) st) \<rightarrow>
+    {gh xs', os, (locvars_xstate G CL S xs')})))"
+apply (rule Eval.eval_evals_exec.induct)
+
+(* case XcptE *)
+apply simp
+
+(* case NewC *) 
+apply clarify
+apply (frule wf_subcls1) (* establish  wf ((subcls1 G)^-1) *)
+apply (simp add: c_hupd_hp_invariant)
+apply (rule progression_one_step)
+apply (rotate_tac 1, drule sym) (* reverse equation (a, None) = new_Addr (fst s) *)
+apply (simp add: locvars_xstate_def locvars_locals_def comp_fields)
+
+
+(* case Cast *)
+apply (intro allI impI)
+apply simp
+apply (frule raise_if_NoneD)
+apply (frule wtpd_expr_cast)
+apply simp
+apply (rule_tac "instrs0.0" = "(compExpr (gmb G CL S) e)" in progression_transitive, simp)
+apply blast
+apply (rule progression_one_step)
+apply (simp add: raise_system_xcpt_def  gh_def comp_cast_ok)
+
+
+(* case Lit *)
+apply simp
+apply (intro strip)
+apply (rule progression_one_step)
+apply simp
+
+
+(* case BinOp *)
+apply (intro allI impI)
+apply (frule_tac xs=s1 in eval_xcpt, assumption) (* establish (gx s1 = None) *)
+apply (frule wtpd_expr_binop)
+(* establish (state_ok \<dots> s1) *)
+apply (frule_tac e=e1 in state_ok_eval) apply (simp (no_asm_simp)) apply simp apply (simp (no_asm_use) only: env_of_jmb_fst) 
+
+
+apply (simp (no_asm_use) only: compExpr_compExprs.simps)
+apply (rule_tac "instrs0.0" = "compExpr (gmb G CL S) e1" in progression_transitive, simp) apply blast
+apply (rule_tac "instrs0.0" = "compExpr (gmb G CL S) e2" in progression_transitive, simp) apply blast
+apply (case_tac bop)
+  (*subcase bop = Eq *)  apply simp apply (rule progression_Eq)
+  (*subcase bop = Add *) apply simp apply (rule progression_one_step) apply simp
+
+
+(* case LAcc *)
+apply simp
+apply (intro strip)
+apply (rule progression_one_step)
+apply (simp add: locvars_xstate_def locvars_locals_def)
+apply (frule wtpd_expr_lacc)
+apply assumption
+apply (simp add: gl_def)
+apply (erule select_at_index)
+
+
+(* case LAss *)
+apply (intro allI impI)
+apply (frule wtpd_expr_lass, erule conjE, erule conjE)
+apply (simp add: compExpr_compExprs.simps)
+
+apply (rule_tac "instrs0.0" = "(compExpr (gmb G CL S) e)" in progression_transitive, rule HOL.refl)
+apply blast
+
+apply (rule_tac "instrs0.0" = "[Dup]" in progression_transitive, simp)
+apply (rule progression_one_step)
+apply (simp add: gh_def)
+apply (rule conjI, simp)+ apply simp
+apply (rule progression_one_step)
+apply (simp add: gh_def)
+(* the following falls out of the general scheme *)
+apply (frule wtpd_expr_lacc) apply assumption
+apply (rule update_at_index)
+apply (rule distinct_method_if_class_sig_defined) apply assumption
+apply assumption apply simp apply assumption
+
+
+(* case FAcc *)
+apply (intro allI impI)
+   (* establish x1 = None \<and> a' \<noteq> Null *)
+apply (simp (no_asm_use) only: gx_conv, frule np_NoneD)
+apply (frule wtpd_expr_facc)
+
+apply (simp (no_asm_use) only: compExpr_compExprs.simps)
+apply (rule_tac "instrs0.0" = "(compExpr (gmb G CL S) e)" in progression_transitive, rule HOL.refl)
+apply blast
+apply (rule progression_one_step)
+apply (simp add: gh_def)
+apply (case_tac "(the (fst s1 (the_Addr a')))")
+apply (simp add: raise_system_xcpt_def)
+
+
+(* case FAss *)
+apply (intro allI impI)
+apply (frule wtpd_expr_fass) apply (erule conjE) apply (frule wtpd_expr_facc)
+apply (simp only: c_hupd_xcpt_invariant) (* establish x2 = None *)
+   (* establish x1 = None  and  a' \<noteq> Null  *)
+apply (frule_tac xs="(np a' x1, s1)" in eval_xcpt)
+apply (simp only: gx_conv, simp only: gx_conv, frule np_NoneD, erule conjE)
+
+
+  (* establish (state_ok \<dots> (Norm s1)) *)
+apply (frule_tac e=e1 in state_ok_eval) apply (simp (no_asm_simp) only: env_of_jmb_fst) apply assumption apply (simp (no_asm_use) only: env_of_jmb_fst) 
+
+apply (simp only: compExpr_compExprs.simps)
+
+apply (rule_tac "instrs0.0" = "(compExpr (gmb G CL S) e1)" in progression_transitive, rule HOL.refl)
+apply fast (* blast does not seem to work - why? *)
+apply (rule_tac "instrs0.0" = "(compExpr (gmb G CL S) e2)" in progression_transitive, rule HOL.refl)
+apply fast
+apply (rule_tac "instrs0.0" = "[Dup_x1]" and "instrs1.0" = "[Putfield fn T]" in progression_transitive, simp)
+
+   (* Dup_x1 *)
+   apply (rule progression_one_step)
+   apply (simp add: gh_def)
+   apply (rule conjI, simp)+ apply simp
+
+
+   (* Putfield \<longrightarrow> still looks nasty*)
+   apply (rule progression_one_step)
+   apply simp
+   apply (case_tac "(the (fst s2 (the_Addr a')))")
+   apply (simp add: c_hupd_hp_invariant)
+   apply (case_tac s2)
+   apply (simp add: c_hupd_conv raise_system_xcpt_def)
+   apply (rule locvars_xstate_par_dep, rule HOL.refl)
+
+defer (* method call *)
+
+(* case XcptEs *)
+apply simp
+
+(* case Nil *)
+apply (simp add: compExpr_compExprs.simps)
+apply (intro strip)
+apply (rule progression_refl)
+
+(* case Cons *)
+apply (intro allI impI)
+apply (frule_tac xs=s1 in evals_xcpt, simp only: gx_conv) (* establish gx s1 = None *)
+apply (frule wtpd_exprs_cons)
+   (* establish (state_ok \<dots> (Norm s0)) *)
+apply (frule_tac e=e in state_ok_eval) apply (simp (no_asm_simp) only: env_of_jmb_fst) apply simp apply (simp (no_asm_use) only: env_of_jmb_fst)
+
+apply simp
+apply (rule_tac "instrs0.0" = "(compExpr (gmb G CL S) e)" in progression_transitive, rule HOL.refl)
+apply fast
+apply fast
+
+
+(* case Statement: exception *)
+apply simp
+
+(* case Skip *)
+apply (intro allI impI)
+apply simp
+apply (rule progression_refl)
+
+(* case Expr *)
+apply (intro allI impI)
+apply (frule wtpd_stmt_expr)
+apply simp
+apply (rule_tac "instrs0.0" = "(compExpr (gmb G CL S) e)" in progression_transitive, rule HOL.refl)
+apply fast
+apply (rule progression_one_step)
+apply simp
+
+(* case Comp *)
+apply (intro allI impI)
+apply (frule_tac xs=s1 in exec_xcpt, assumption) (* establish (gx s1 = None) *)
+apply (frule wtpd_stmt_comp)
+
+  (* establish (state_ok \<dots>  s1) *)
+apply (frule_tac st=c1 in state_ok_exec) apply (simp (no_asm_simp) only: env_of_jmb_fst) apply simp apply (simp (no_asm_use) only: env_of_jmb_fst)
+
+apply simp
+apply (rule_tac "instrs0.0" = "(compStmt (gmb G CL S) c1)" in progression_transitive, rule HOL.refl)
+apply fast
+apply fast
+
+
+(* case Cond *)
+apply (intro allI impI)
+apply (frule_tac xs=s1 in exec_xcpt, assumption) (* establish (gx s1 = None) *)
+apply (frule wtpd_stmt_cond, (erule conjE)+)
+(* establish (state_ok \<dots> s1) *)
+apply (frule_tac e=e in state_ok_eval) 
+apply (simp (no_asm_simp) only: env_of_jmb_fst)
+apply assumption 
+apply (simp (no_asm_use) only: env_of_jmb_fst) 
+(* establish G,gh s1\<turnstile>v::\<preceq>PrimT Boolean *)
+apply (frule eval_conf, assumption+, rule env_of_jmb_fst)
+apply (frule conf_bool) (* establish \<exists>b. v = Bool b *)
+apply (erule exE)
+
+apply simp
+apply (rule_tac "instrs0.0" = "[LitPush (Bool False)]" in progression_transitive, simp (no_asm_simp))
+apply (rule progression_one_step,  simp)
+apply (rule conjI, rule HOL.refl)+ apply (rule HOL.refl)
+
+apply (rule_tac "instrs0.0" = "compExpr (gmb G CL S) e" in progression_transitive, rule HOL.refl)
+apply fast
+
+apply (case_tac b)
+ (* case b= True *)
+apply simp
+apply (rule_tac "instrs0.0" = "[Ifcmpeq (2 + int (length (compStmt (gmb G CL S) c1)))]" in progression_transitive, simp)
+apply (rule progression_one_step) apply simp
+apply (rule conjI, rule HOL.refl)+ apply (rule HOL.refl)
+apply (rule_tac "instrs0.0" = "(compStmt (gmb G CL S) c1)" in progression_transitive, simp)
+apply fast
+apply (rule_tac "instrs1.0" = "[]" in jump_fwd_progression)
+apply (simp, rule conjI, (rule HOL.refl)+)
+apply simp apply (rule conjI, simp) apply (simp add: NatBin.nat_add_distrib)
+apply (rule progression_refl)
+
+ (* case b= False *)
+apply simp
+apply (rule_tac "instrs1.0" = "compStmt (gmb G CL S) c2" in jump_fwd_progression)
+apply (simp, rule conjI, (rule HOL.refl)+)
+apply (simp, rule conjI, rule HOL.refl, simp add: NatBin.nat_add_distrib)
+apply fast
+
+(* case exit Loop *)
+apply (intro allI impI)
+apply (frule wtpd_stmt_loop, (erule conjE)+)
+
+(* establish G,gh s1\<turnstile>v::\<preceq>PrimT Boolean *)
+apply (frule eval_conf, assumption+, rule env_of_jmb_fst)
+apply (frule conf_bool) (* establish \<exists>b. v = Bool b *)
+apply (erule exE)
+apply (case_tac b)
+
+ (* case b= True \<longrightarrow> contradiction *)
+apply simp
+
+ (* case b= False *)
+apply simp
+
+apply (rule_tac "instrs0.0" = "[LitPush (Bool False)]" in progression_transitive, simp (no_asm_simp))
+apply (rule progression_one_step)
+   apply simp 
+   apply (rule conjI, rule HOL.refl)+ apply (rule HOL.refl)
+
+apply (rule_tac "instrs0.0" = "compExpr (gmb G CL S) e" in progression_transitive, rule HOL.refl)
+apply fast
+apply (rule_tac "instrs1.0" = "[]" in jump_fwd_progression)
+apply (simp, rule conjI, rule HOL.refl, rule HOL.refl)
+apply (simp, rule conjI, rule HOL.refl, simp add: NatBin.nat_add_distrib)
+apply (rule progression_refl)
+
+
+(* case continue Loop *)
+apply (intro allI impI)
+apply (frule_tac xs=s2 in exec_xcpt, assumption) (* establish (gx s2 = None) *)
+apply (frule_tac xs=s1 in exec_xcpt, assumption) (* establish (gx s1 = None) *)
+apply (frule wtpd_stmt_loop, (erule conjE)+)
+
+(* establish (state_ok \<dots> s1) *)
+apply (frule_tac e=e in state_ok_eval) apply (simp (no_asm_simp) only: env_of_jmb_fst) apply simp apply (simp (no_asm_use) only: env_of_jmb_fst)
+(* establish (state_ok \<dots> s2) *)
+apply (frule_tac xs=s1 and st=c in state_ok_exec)
+apply (simp (no_asm_simp) only: env_of_jmb_fst) apply assumption apply (simp (no_asm_use) only: env_of_jmb_fst)
+
+(* establish G,gh s1\<turnstile>v::\<preceq>PrimT Boolean *)
+apply (frule eval_conf, assumption+, rule env_of_jmb_fst)
+apply (frule conf_bool) (* establish \<exists>b. v = Bool b *)
+apply (erule exE)
+
+apply simp
+apply (rule jump_bwd_progression) 
+apply simp
+apply (rule conjI, (rule HOL.refl)+)
+
+apply (rule_tac "instrs0.0" = "[LitPush (Bool False)]" in progression_transitive, simp (no_asm_simp))
+apply (rule progression_one_step)
+   apply simp 
+   apply (rule conjI, simp)+ apply simp
+
+apply (rule_tac "instrs0.0" = "compExpr (gmb G CL S) e" in progression_transitive, rule HOL.refl)
+apply fast
+
+apply (case_tac b)
+ (* case b= True *)
+apply simp
+
+apply (rule_tac "instrs0.0" = "[Ifcmpeq (2 + int (length (compStmt (gmb G CL S) c)))]" in progression_transitive, simp)
+apply (rule progression_one_step) apply simp
+apply (rule conjI, rule HOL.refl)+ apply (rule HOL.refl)
+apply fast
+
+ (* case b= False \<longrightarrow> contradiction*)
+apply simp
+
+apply (rule jump_bwd_one_step)
+apply simp
+apply blast
+
+(*****)
+(* case method call *) defer (* !!! NEWC *)
+
+apply (intro allI impI)
+
+apply (frule_tac xs=s3 in eval_xcpt, simp only: gx_conv) (* establish gx s3 = None *)
+apply (frule exec_xcpt, assumption, simp (no_asm_use) only: gx_conv, frule np_NoneD) (* establish x = None \<and> a' \<noteq> Null *)
+apply (frule evals_xcpt, simp only: gx_conv) (* establish gx s1 = None *)
+
+apply (frule wtpd_expr_call, (erule conjE)+)
+
+
+(* assumptions about state_ok and is_class *)
+
+(* establish state_ok (env_of_jmb G CL S) s1 *)
+apply (frule_tac xs="Norm s0" and e=e in state_ok_eval)
+apply (simp (no_asm_simp) only: env_of_jmb_fst, assumption, simp (no_asm_use) only: env_of_jmb_fst)
+
+(* establish state_ok (env_of_jmb G CL S) (x, h, l) *)
+apply (frule_tac xs=s1 and xs'="(x, h, l)" in state_ok_evals)
+apply (simp (no_asm_simp) only: env_of_jmb_fst, assumption, simp only: env_of_jmb_fst)
+
+(* establish \<exists> lc. a' = Addr lc *)
+apply (frule (5) eval_of_class, rule env_of_jmb_fst [THEN sym])
+apply (subgoal_tac "G,h \<turnstile> a' ::\<preceq> Class C")
+apply (subgoal_tac "is_class G dynT")
+
+(* establish method (G, dynT) (mn, pTs) = Some(md, rT, pns, lvars, blk, res) *)
+apply (drule method_defined, assumption+)
+apply (simp only: env_of_jmb_fst)
+apply ((erule exE)+, erule conjE, (rule exI)+, assumption) 
+
+apply (subgoal_tac "is_class G md")
+apply (subgoal_tac "G\<turnstile>Class dynT \<preceq> Class md")
+apply (subgoal_tac " method (G, md) (mn, pTs) = Some (md, rT, pns, lvars, blk, res)")
+apply (subgoal_tac "list_all2 (conf G h) pvs pTs")
+
+(* establish state_ok (env_of_jmb G md (mn, pTs)) (np a' x, h, init_vars lvars(pns[\<mapsto>]pvs)(This\<mapsto>a')) *)
+apply (subgoal_tac "G,h \<turnstile> a' ::\<preceq> Class dynT")
+apply (frule (2) conf_widen)
+apply (frule state_ok_init, assumption+)
+
+apply (subgoal_tac "class_sig_defined G md (mn, pTs)")
+apply (frule wtpd_blk, assumption, assumption)
+apply (frule wtpd_res, assumption, assumption)
+apply (subgoal_tac "state_ok (env_of_jmb G md (mn, pTs)) s3")
+
+(* establish method (TranslComp.comp G, md) (mn, pTs) =
+          Some (md, rT, compMethod (pns, lvars, blk, res)) *)
+apply (frule_tac C=md and D=md in comp_method, assumption, assumption)
+
+(* establish
+   method (TranslComp.comp G, dynT) (mn, pTs) =
+          Some (md, rT, compMethod (pns, lvars, blk, res)) *)
+ apply (frule_tac C=dynT and D=md in comp_method, assumption, assumption)
+ apply (simp only: fst_conv snd_conv)
+
+(* establish length pns = length pTs *)
+apply (frule method_preserves_length, assumption, assumption) 
+(* establish length pvs = length ps *)
+apply (frule evals_preserves_length [THEN sym])
+
+(** start evaluating subexpressions **)
+apply (simp (no_asm_use) only: compExpr_compExprs.simps)
+
+  (* evaluate e *)
+apply (rule_tac "instrs0.0" = "(compExpr (gmb G CL S) e)" in progression_transitive, rule HOL.refl)
+apply fast
+
+  (* evaluate parameters *)
+apply (rule_tac "instrs0.0" = "compExprs (gmb G CL S) ps" in progression_transitive, rule HOL.refl)
+apply fast
+
+  (* invokation *)
+apply (rule progression_call)
+apply (intro allI impI conjI)
+     (* execute Invoke statement *)
+apply (simp (no_asm_use) only: exec_instr.simps)
+apply (erule thin_rl, erule thin_rl, erule thin_rl)
+apply (simp add: compMethod_def raise_system_xcpt_def)
+apply (rule conjI, simp)+ apply (rule HOL.refl)
+
+     (* get instructions of invoked method *)
+apply (simp (no_asm_simp) add: gis_def gmb_def compMethod_def)
+
+       (* var. initialization *)
+apply (rule_tac "instrs0.0" = "(compInitLvars (pns, lvars, blk, res) lvars)" in progression_transitive, rule HOL.refl)
+apply (rule_tac C=md in progression_lvar_init, assumption, assumption, assumption)
+apply (simp (no_asm_simp)) (* length pns = length pvs *)
+apply (simp (no_asm_simp)) (* length lvars = length (replicate (length lvars) arbitrary) *)
+
+
+       (* body statement *)
+apply (rule_tac "instrs0.0" = "compStmt (pns, lvars, blk, res) blk" in progression_transitive, rule HOL.refl)
+apply (subgoal_tac "(pns, lvars, blk, res) = gmb G md (mn, pTs)")
+apply (simp (no_asm_simp))
+apply (simp only: gh_conv)
+apply ((drule mp, rule TrueI)+, (drule spec)+, (drule mp, assumption)+, assumption)
+apply (simp (no_asm_use))
+apply (simp (no_asm_simp) add: gmb_def)
+
+       (* return expression *) 
+apply (subgoal_tac "(pns, lvars, blk, res) = gmb G md (mn, pTs)")
+apply (simp (no_asm_simp))
+apply (simp only: gh_conv)
+apply ((drule mp, rule TrueI)+, (drule spec)+, (drule mp, assumption)+, assumption)
+apply (simp (no_asm_use))
+apply (simp (no_asm_simp) add: gmb_def)
+
+      (* execute return statement *)
+apply (simp (no_asm_use) add: gh_def locvars_xstate_def gl_def del: drop_append)
+apply (subgoal_tac "rev pvs @ a' # os = (rev (a' # pvs)) @ os")
+apply (simp only: drop_append)
+apply (simp (no_asm_simp))
+apply (simp (no_asm_simp))
+
+(* show state_ok \<dots> s3 *)
+apply (rule_tac xs = "(np a' x, h, init_vars lvars(pns[\<mapsto>]pvs)(This\<mapsto>a'))" and st=blk in state_ok_exec)
+apply assumption apply (simp (no_asm_simp) only: env_of_jmb_fst) 
+apply assumption apply (simp (no_asm_use) only: env_of_jmb_fst)
+
+(* show class_sig_defined G md (mn, pTs) *)
+apply (simp (no_asm_simp) add: class_sig_defined_def)
+
+(* show G,h \<turnstile> a' ::\<preceq> Class dynT *)
+apply (frule non_npD) apply assumption
+apply (erule exE)+ apply simp
+apply (rule conf_obj_AddrI) apply simp 
+apply (rule conjI, (rule HOL.refl)+)
+apply (rule widen_Class_Class [THEN iffD1], rule widen.refl)
+
+
+  (* show list_all2 (conf G h) pvs pTs *)
+apply (erule exE)+ apply (erule conjE)+
+apply (rule_tac Ts="pTsa" in conf_list_gext_widen) apply assumption
+apply (subgoal_tac "((gx s1, gs s1), ps, pvs, x, h, l) \<in> evals G")
+apply (frule_tac E="env_of_jmb G CL S" in evals_type_sound)
+apply (simp only: env_of_jmb_fst) 
+apply assumption apply (simp only: state_ok_def)
+apply (simp add: conforms_def xconf_def gs_def)
+apply simp
+apply (simp (no_asm_use) only: gx_def gs_def surjective_pairing [THEN sym])
+apply (simp (no_asm_use) only: ty_exprs_list_all2) apply simp
+apply (simp (no_asm_use) only: gx_def gs_def surjective_pairing [THEN sym])
+    (* list_all2 (\<lambda>T T'. G \<turnstile> T \<preceq> T') pTsa pTs *)
+    apply (rule max_spec_widen, simp only: env_of_jmb_fst)
+
+
+(* show method (G, md) (mn, pTs) = Some (md, rT, pns, lvars, blk, res) *)
+apply (frule method_in_md [THEN conjunct2], assumption+)
+
+  (* show G\<turnstile>Class dynT \<preceq> Class md *)
+apply (simp (no_asm_use) only: widen_Class_Class)
+apply (rule method_wf_mdecl [THEN conjunct1], assumption+)
+
+  (* is_class G md *)
+apply (rule method_in_md [THEN conjunct1], assumption+)
+
+  (* show is_class G dynT *)
+apply (frule non_npD) apply assumption
+apply (erule exE)+ apply (erule conjE)+
+apply simp
+apply (rule subcls_is_class2) apply assumption
+apply (frule class_expr_is_class) apply (simp only: env_of_jmb_fst)
+apply (simp only: env_of_jmb_fst)
+
+ (* show G,h \<turnstile> a' ::\<preceq> Class C *)
+apply (simp only: wtpd_exprs_def, erule exE)
+apply (frule evals_preserves_conf)
+apply (rule eval_conf, assumption+)
+apply (rule env_of_jmb_fst, assumption+)
+apply (rule env_of_jmb_fst)
+apply (simp only: gh_conv)
+done
+
+
+theorem compiler_correctness_eval: "
+  \<lbrakk> G \<turnstile> (None,hp,loc) -ex \<succ> val-> (None,hp',loc');
+  wf_java_prog G;
+  class_sig_defined G C S;
+  wtpd_expr (env_of_jmb G C S) ex;
+  (None,hp,loc) ::\<preceq> (env_of_jmb G C S) \<rbrakk> \<Longrightarrow>
+  {(TranslComp.comp G), C, S} \<turnstile> 
+    {hp, os, (locvars_locals G C S loc)}
+      >- (compExpr (gmb G C S) ex) \<rightarrow> 
+    {hp', val#os, (locvars_locals G C S loc')}"
+apply (frule compiler_correctness [THEN conjunct1])
+apply (auto simp: gh_def gx_def gs_def gl_def locvars_xstate_def state_ok_def)
+done
+
+theorem compiler_correctness_exec: "
+  \<lbrakk> ((None,hp,loc), st, (None,hp',loc')) \<in> Eval.exec G;
+  wf_java_prog G;
+  class_sig_defined G C S;
+  wtpd_stmt (env_of_jmb G C S) st;
+  (None,hp,loc) ::\<preceq> (env_of_jmb G C S) \<rbrakk> \<Longrightarrow>
+  {(TranslComp.comp G), C, S} \<turnstile> 
+    {hp, os, (locvars_locals G C S loc)}
+      >- (compStmt (gmb G C S) st) \<rightarrow>
+    {hp', os, (locvars_locals G C S loc')}"
+apply (frule compiler_correctness [THEN conjunct2 [THEN conjunct2]])
+apply (auto simp: gh_def gx_def gs_def gl_def locvars_xstate_def state_ok_def)
+done
+
+(**********************************************************************)
+
+
+(* reinstall pair splits *)
+declare split_paired_All [simp] split_paired_Ex [simp]
+ML_setup {*
+simpset_ref() := simpset() addloop ("split_all_tac", split_all_tac)
+*}
+
+end




