author | paulson |
Mon, 22 Oct 2001 11:54:22 +0200 | |
changeset 11868 | 56db9f3a6b3e |
parent 11701 | 3d51fbf81c17 |
child 13797 | baefae13ad37 |
permissions | -rw-r--r-- |
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(* Title: HOL/UNITY/Counterc |
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ID: $Id$ |
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Author: Sidi O Ehmety, Cambridge University Computer Laboratory |
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Copyright 2001 University of Cambridge |
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|
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A family of similar counters, version with a full use of "compatibility " |
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From Charpentier and Chandy, |
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Examples of Program Composition Illustrating the Use of Universal Properties |
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In J. Rolim (editor), Parallel and Distributed Processing, |
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Spriner LNCS 1586 (1999), pages 1215-1227. |
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*) |
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Addsimps [Component_def RS def_prg_Init, |
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Component_def RS def_prg_AllowedActs]; |
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program_defs_ref := [Component_def]; |
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Addsimps (map simp_of_act [a_def]); |
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(* Theorems about sum and sumj *) |
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Goal "ALL i. I<i--> (sum I s = sumj I i s)"; |
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by (induct_tac "I" 1); |
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by Auto_tac; |
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qed_spec_mp "sum_sumj_eq1"; |
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Goal "i<I --> sum I s = c s i + sumj I i s"; |
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by (induct_tac "I" 1); |
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by (auto_tac (claset(), simpset() addsimps [linorder_neq_iff, sum_sumj_eq1])); |
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qed_spec_mp "sum_sumj_eq2"; |
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Goal "(ALL i. i<I --> c s' i = c s i) --> (sum I s' = sum I s)"; |
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by (induct_tac "I" 1 THEN Auto_tac); |
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qed_spec_mp "sum_ext"; |
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Goal "(ALL j. j<I & j~=i --> c s' j = c s j) --> (sumj I i s' = sumj I i s)"; |
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by (induct_tac "I" 1); |
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by Safe_tac; |
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by (auto_tac (claset() addSIs [sum_ext], simpset())); |
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qed_spec_mp "sumj_ext"; |
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Goal "(ALL i. i<I --> c s i = 0) --> sum I s = 0"; |
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by (induct_tac "I" 1); |
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by Auto_tac; |
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qed "sum0"; |
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(* Safety properties for Components *) |
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Goal "(Component i ok G) = \ |
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\ (G: preserves (%s. c s i) & Component i:Allowed G)"; |
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by (auto_tac (claset(), |
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simpset() addsimps [ok_iff_Allowed, Component_def RS def_prg_Allowed])); |
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qed "Component_ok_iff"; |
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AddIffs [Component_ok_iff]; |
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AddIffs [OK_iff_ok]; |
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Addsimps [preserves_def]; |
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Goal "Component i: stable {s. C s = (c s) i + k}"; |
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by (constrains_tac 1); |
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qed "p2"; |
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Goal "[| OK I Component; i:I |] \ |
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\ ==> Component i: stable {s. ALL j:I. j~=i --> c s j = c k j}"; |
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by (full_simp_tac (simpset() addsimps [stable_def, constrains_def]) 1); |
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by (Blast_tac 1); |
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qed "p3"; |
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Goal |
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"[| OK {i. i<I} Component; i<I |] ==> \ |
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\ ALL k. Component i: stable ({s. C s = c s i + sumj I i k} Int \ |
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\ {s. ALL j:{i. i<I}. j~=i --> c s j = c k j})"; |
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by (blast_tac (claset() addIs [[p2, p3] MRS stable_Int]) 1); |
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qed "p2_p3_lemma1"; |
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Goal "(ALL k. F:stable ({s. C s = (c s) i + sumj I i k} Int \ |
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\ {s. ALL j:{i. i<I}. j~=i --> c s j = c k j})) \ |
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\ ==> (F:stable {s. C s = c s i + sumj I i s})"; |
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by (full_simp_tac (simpset() addsimps [constrains_def, stable_def]) 1); |
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by (force_tac (claset() addSIs [sumj_ext], simpset()) 1); |
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qed "p2_p3_lemma2"; |
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Goal "[| OK {i. i<I} Component; i<I |] \ |
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\ ==> Component i: stable {s. C s = c s i + sumj I i s}"; |
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by (blast_tac (claset() addIs [p2_p3_lemma1 RS p2_p3_lemma2]) 1); |
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qed "p2_p3"; |
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(* Compositional correctness *) |
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Goalw [invariant_def] |
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"[| 0<I; OK {i. i<I} Component |] \ |
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\ ==> (JN i:{i. i<I}. (Component i)) : invariant {s. C s = sum I s}"; |
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by (simp_tac (simpset() addsimps [JN_stable, sum_sumj_eq2]) 1); |
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by (auto_tac (claset() addSIs [sum0 RS mp, p2_p3], |
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simpset())); |
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qed "safety"; |
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ea13ff5a26d1
reorganization of HOL/UNITY, moving examples to subdirectories Simple and Comp
paulson
parents:
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