author | nipkow |
Thu, 14 Jan 1999 13:19:12 +0100 | |
changeset 6129 | 0f5ecd633c2f |
parent 6081 | aa97eb904692 |
child 6918 | 63c9df6b5c4b |
permissions | -rw-r--r-- |
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(* Title: HOL/IOA/NTP/Impl.ML |
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ID: $Id$ |
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Author: Tobias Nipkow & Konrad Slind |
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Copyright 1994 TU Muenchen |
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The implementation --- Invariants |
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*) |
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Addsimps [Let_def]; |
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open Abschannel Impl; |
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val impl_ioas = |
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[Impl.impl_def, |
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Sender.sender_ioa_def, |
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Receiver.receiver_ioa_def, |
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srch_ioa_thm RS eq_reflection, |
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rsch_ioa_thm RS eq_reflection]; |
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val transitions = [Sender.sender_trans_def, Receiver.receiver_trans_def, |
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srch_trans_def, rsch_trans_def]; |
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Addsimps [ioa_triple_proj, starts_of_par, trans_of_par4, |
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in_sender_asig, in_receiver_asig, in_srch_asig, |
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in_rsch_asig]; |
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Addcongs [let_weak_cong]; |
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Goal |
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"fst(x) = sen(x) & \ |
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\ fst(snd(x)) = rec(x) & \ |
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\ fst(snd(snd(x))) = srch(x) & \ |
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\ snd(snd(snd(x))) = rsch(x)"; |
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by (simp_tac (simpset() addsimps |
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[sen_def,rec_def,srch_def,rsch_def]) 1); |
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Addsimps [result()]; |
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Goal "a:actions(sender_asig) \ |
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\ | a:actions(receiver_asig) \ |
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\ | a:actions(srch_asig) \ |
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\ | a:actions(rsch_asig)"; |
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by (induct_tac "a" 1); |
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by (ALLGOALS (Simp_tac)); |
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Addsimps [result()]; |
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Delsimps [split_paired_All]; |
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(* Three Simp_sets in different sizes |
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---------------------------------------------- |
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1) simpset() does not unfold the transition relations |
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2) ss unfolds transition relations |
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3) renname_ss unfolds transitions and the abstract channel *) |
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val ss = (simpset() addcongs [if_weak_cong] |
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addsimps transitions); |
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val rename_ss = (ss addsimps unfold_renaming); |
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val tac = asm_simp_tac (ss addcongs [conj_cong] addsplits [split_if]); |
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val tac_ren = asm_simp_tac (rename_ss addcongs [conj_cong] addsplits [split_if]); |
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(* INVARIANT 1 *) |
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Goalw impl_ioas "invariant impl_ioa inv1"; |
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by (rtac invariantI 1); |
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by (asm_full_simp_tac (simpset() |
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addsimps [inv1_def, hdr_sum_def, Sender.srcvd_def, |
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Sender.ssent_def, Receiver.rsent_def,Receiver.rrcvd_def]) 1); |
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by (simp_tac (simpset() delsimps [trans_of_par4] |
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addsimps [fork_lemma,inv1_def]) 1); |
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(* Split proof in two *) |
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by (rtac conjI 1); |
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(* First half *) |
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by (asm_full_simp_tac (simpset() addsimps [Impl.inv1_def] |
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delsplits [split_if]) 1); |
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by (rtac Action.action.induct 1); |
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by (EVERY1[tac, tac, tac, tac]); |
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by (tac 1); |
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by (tac_ren 1); |
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(* 5 + 1 *) |
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by (tac 1); |
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by (tac_ren 1); |
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(* 4 + 1 *) |
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by (EVERY1[tac, tac, tac, tac]); |
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(* Now the other half *) |
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by (asm_full_simp_tac (simpset() addsimps [Impl.inv1_def] |
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delsplits [split_if]) 1); |
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by (rtac Action.action.induct 1); |
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by (EVERY1[tac, tac]); |
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(* detour 1 *) |
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by (tac 1); |
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by (tac_ren 1); |
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by (rtac impI 1); |
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by (REPEAT (etac conjE 1)); |
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by (asm_simp_tac (simpset() addsimps [hdr_sum_def, Multiset.count_def, |
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Multiset.countm_nonempty_def] |
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addsplits [split_if]) 1); |
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(* detour 2 *) |
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by (tac 1); |
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by (tac_ren 1); |
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by (rtac impI 1); |
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by (REPEAT (etac conjE 1)); |
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by (asm_full_simp_tac (simpset() addsimps [Impl.hdr_sum_def, |
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Multiset.count_def, |
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Multiset.countm_nonempty_def, |
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Multiset.delm_nonempty_def] |
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addsplits [split_if]) 1); |
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by (rtac allI 1); |
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by (rtac conjI 1); |
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by (rtac impI 1); |
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by (hyp_subst_tac 1); |
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by (rtac (pred_suc RS iffD1) 1); |
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by (dtac less_le_trans 1); |
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by (cut_facts_tac [rewrite_rule[Packet.hdr_def] |
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eq_packet_imp_eq_hdr RS countm_props] 1);; |
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by (assume_tac 1); |
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by (assume_tac 1); |
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by (rtac (countm_done_delm RS mp RS sym) 1); |
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by (rtac refl 1); |
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by (asm_simp_tac (simpset() addsimps [Multiset.count_def]) 1); |
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by (rtac impI 1); |
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by (asm_full_simp_tac (simpset() addsimps [neg_flip]) 1); |
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by (hyp_subst_tac 1); |
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by (rtac countm_spurious_delm 1); |
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by (Simp_tac 1); |
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|
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by (EVERY1[tac, tac, tac, tac, tac, tac]); |
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qed "inv1"; |
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148 |
|
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149 |
|
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150 |
|
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151 |
(* INVARIANT 2 *) |
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152 |
|
5068 | 153 |
Goal "invariant impl_ioa inv2"; |
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154 |
|
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155 |
by (rtac invariantI1 1); |
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156 |
(* Base case *) |
4098 | 157 |
by (asm_full_simp_tac (simpset() addsimps (inv2_def :: |
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158 |
(receiver_projections |
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159 |
@ sender_projections @ impl_ioas))) |
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160 |
1); |
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161 |
|
4833 | 162 |
by (asm_simp_tac (simpset() addsimps impl_ioas delsplits [split_if]) 1); |
5192 | 163 |
by (induct_tac "a" 1); |
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164 |
|
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165 |
(* 10 cases. First 4 are simple, since state doesn't change *) |
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166 |
|
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167 |
val tac2 = asm_full_simp_tac (ss addsimps [inv2_def]); |
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168 |
|
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169 |
(* 10 - 7 *) |
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170 |
by (EVERY1[tac2,tac2,tac2,tac2]); |
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171 |
(* 6 *) |
4423 | 172 |
by (forward_tac [rewrite_rule [Impl.inv1_def] |
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173 |
(inv1 RS invariantE) RS conjunct1] 1); |
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174 |
(* 6 - 5 *) |
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175 |
by (EVERY1[tac2,tac2]); |
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176 |
|
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177 |
(* 4 *) |
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178 |
by (forward_tac [rewrite_rule [Impl.inv1_def] |
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179 |
(inv1 RS invariantE) RS conjunct1] 1); |
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180 |
by (tac2 1); |
6129 | 181 |
by(arith_tac 1); |
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182 |
|
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183 |
(* 3 *) |
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184 |
by (forward_tac [rewrite_rule [Impl.inv1_def] (inv1 RS invariantE)] 1); |
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185 |
|
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186 |
by (tac2 1); |
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187 |
by (fold_tac [rewrite_rule [Packet.hdr_def]Impl.hdr_sum_def]); |
6129 | 188 |
by(arith_tac 1); |
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189 |
|
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190 |
(* 2 *) |
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191 |
by (tac2 1); |
4423 | 192 |
by (forward_tac [rewrite_rule [Impl.inv1_def] |
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193 |
(inv1 RS invariantE) RS conjunct1] 1); |
6081 | 194 |
by (strip_tac 1); |
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195 |
by (REPEAT (etac conjE 1)); |
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196 |
by (Asm_full_simp_tac 1); |
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197 |
|
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198 |
(* 1 *) |
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199 |
by (tac2 1); |
4423 | 200 |
by (forward_tac [rewrite_rule [Impl.inv1_def] |
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201 |
(inv1 RS invariantE) RS conjunct2] 1); |
6081 | 202 |
by (strip_tac 1); |
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203 |
by (REPEAT (etac conjE 1)); |
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204 |
by (fold_tac [rewrite_rule[Packet.hdr_def]Impl.hdr_sum_def]); |
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205 |
by (Asm_full_simp_tac 1); |
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206 |
qed "inv2"; |
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207 |
|
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208 |
|
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209 |
(* INVARIANT 3 *) |
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210 |
|
5068 | 211 |
Goal "invariant impl_ioa inv3"; |
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212 |
|
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213 |
by (rtac invariantI 1); |
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214 |
(* Base case *) |
4098 | 215 |
by (asm_full_simp_tac (simpset() addsimps |
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216 |
(Impl.inv3_def :: (receiver_projections |
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217 |
@ sender_projections @ impl_ioas))) 1); |
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218 |
|
4833 | 219 |
by (asm_simp_tac (simpset() addsimps impl_ioas delsplits [split_if]) 1); |
5192 | 220 |
by (induct_tac "a" 1); |
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221 |
|
6081 | 222 |
val tac3 = asm_full_simp_tac (ss addsimps [inv3_def]); |
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223 |
|
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224 |
(* 10 - 8 *) |
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225 |
|
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226 |
by (EVERY1[tac3,tac3,tac3]); |
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227 |
|
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228 |
by (tac_ren 1); |
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229 |
by (strip_tac 1 THEN REPEAT (etac conjE 1)); |
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230 |
by (hyp_subst_tac 1); |
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231 |
by (etac exE 1); |
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232 |
by (Asm_full_simp_tac 1); |
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233 |
|
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234 |
(* 7 *) |
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235 |
by (tac3 1); |
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236 |
by (tac_ren 1); |
6081 | 237 |
by (Blast_tac 1); |
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238 |
|
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239 |
(* 6 - 3 *) |
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240 |
|
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241 |
by (EVERY1[tac3,tac3,tac3,tac3]); |
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242 |
|
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243 |
(* 2 *) |
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244 |
by (asm_full_simp_tac ss 1); |
4098 | 245 |
by (simp_tac (simpset() addsimps [inv3_def]) 1); |
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246 |
by (strip_tac 1 THEN REPEAT (etac conjE 1)); |
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247 |
by (rtac (imp_or_lem RS iffD2) 1); |
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248 |
by (rtac impI 1); |
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249 |
by (forward_tac [rewrite_rule [Impl.inv2_def] (inv2 RS invariantE)] 1); |
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250 |
by (Asm_full_simp_tac 1); |
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251 |
by (REPEAT (etac conjE 1)); |
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252 |
by (res_inst_tac [("j","count (ssent(sen s)) (~sbit(sen s))"), |
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253 |
("k","count (rsent(rec s)) (sbit(sen s))")] le_trans 1); |
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254 |
by (forward_tac [rewrite_rule [inv1_def] |
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255 |
(inv1 RS invariantE) RS conjunct2] 1); |
4098 | 256 |
by (asm_full_simp_tac (simpset() addsimps |
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257 |
[hdr_sum_def, Multiset.count_def]) 1); |
4377 | 258 |
by (rtac add_le_mono 1); |
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259 |
by (rtac countm_props 1); |
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260 |
by (Simp_tac 1); |
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261 |
by (rtac countm_props 1); |
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262 |
by (Simp_tac 1); |
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263 |
by (assume_tac 1); |
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264 |
|
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265 |
(* 1 *) |
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266 |
by (tac3 1); |
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267 |
by (strip_tac 1 THEN REPEAT (etac conjE 1)); |
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268 |
by (rtac (imp_or_lem RS iffD2) 1); |
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269 |
by (rtac impI 1); |
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270 |
by (forward_tac [rewrite_rule [Impl.inv2_def] (inv2 RS invariantE)] 1); |
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271 |
by (Asm_full_simp_tac 1); |
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272 |
qed "inv3"; |
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273 |
|
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274 |
|
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275 |
(* INVARIANT 4 *) |
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276 |
|
5068 | 277 |
Goal "invariant impl_ioa inv4"; |
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278 |
|
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279 |
by (rtac invariantI 1); |
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280 |
(* Base case *) |
4098 | 281 |
by (asm_full_simp_tac (simpset() addsimps |
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282 |
(Impl.inv4_def :: (receiver_projections |
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283 |
@ sender_projections @ impl_ioas))) 1); |
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284 |
|
4833 | 285 |
by (asm_simp_tac (simpset() addsimps impl_ioas delsplits [split_if]) 1); |
5192 | 286 |
by (induct_tac "a" 1); |
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287 |
|
6081 | 288 |
val tac4 = asm_full_simp_tac (ss addsimps [inv4_def]); |
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289 |
|
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290 |
(* 10 - 2 *) |
6081 | 291 |
|
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292 |
by (EVERY1[tac4,tac4,tac4,tac4,tac4,tac4,tac4,tac4,tac4]); |
4731 | 293 |
|
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294 |
(* 2 b *) |
6081 | 295 |
|
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296 |
by (strip_tac 1 THEN REPEAT (etac conjE 1)); |
4423 | 297 |
by (forward_tac [rewrite_rule [Impl.inv2_def] |
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298 |
(inv2 RS invariantE)] 1); |
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299 |
by (Asm_full_simp_tac 1); |
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300 |
|
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301 |
(* 1 *) |
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302 |
by (tac4 1); |
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303 |
by (strip_tac 1 THEN REPEAT (etac conjE 1)); |
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304 |
by (rtac ccontr 1); |
4423 | 305 |
by (forward_tac [rewrite_rule [Impl.inv2_def] |
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306 |
(inv2 RS invariantE)] 1); |
4423 | 307 |
by (forward_tac [rewrite_rule [Impl.inv3_def] |
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308 |
(inv3 RS invariantE)] 1); |
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309 |
by (Asm_full_simp_tac 1); |
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310 |
by (eres_inst_tac [("x","m")] allE 1); |
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311 |
by (Asm_full_simp_tac 1); |
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312 |
qed "inv4"; |
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313 |
|
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314 |
|
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315 |
(* rebind them *) |
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316 |
|
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317 |
val inv1 = rewrite_rule [Impl.inv1_def] (inv1 RS invariantE); |
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318 |
val inv2 = rewrite_rule [Impl.inv2_def] (inv2 RS invariantE); |
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val inv3 = rewrite_rule [Impl.inv3_def] (inv3 RS invariantE); |
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val inv4 = rewrite_rule [Impl.inv4_def] (inv4 RS invariantE); |