src/HOLCF/IOA/ex/TrivEx2.thy
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(*  Title:      HOLCF/IOA/TrivEx.thy
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    ID:         $Id$
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    Author:     Olaf Müller
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*)
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header {* Trivial Abstraction Example with fairness *}
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theory TrivEx2
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imports IOA Abstraction
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begin
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datatype action = INC
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consts
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C_asig   ::  "action signature"
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C_trans  :: "(action, nat)transition set"
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C_ioa    :: "(action, nat)ioa"
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C_live_ioa :: "(action, nat)live_ioa"
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A_asig   :: "action signature"
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A_trans  :: "(action, bool)transition set"
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A_ioa    :: "(action, bool)ioa"
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A_live_ioa :: "(action, bool)live_ioa"
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h_abs    :: "nat => bool"
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defs
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C_asig_def:
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  "C_asig == ({},{INC},{})"
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C_trans_def: "C_trans ==
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 {tr. let s = fst(tr);
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          t = snd(snd(tr))
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      in case fst(snd(tr))
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      of
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      INC       => t = Suc(s)}"
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C_ioa_def: "C_ioa ==
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 (C_asig, {0}, C_trans,{},{})"
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C_live_ioa_def:
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  "C_live_ioa == (C_ioa, WF C_ioa {INC})"
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A_asig_def:
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  "A_asig == ({},{INC},{})"
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A_trans_def: "A_trans ==
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 {tr. let s = fst(tr);
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          t = snd(snd(tr))
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      in case fst(snd(tr))
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      of
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      INC       => t = True}"
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A_ioa_def: "A_ioa ==
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 (A_asig, {False}, A_trans,{},{})"
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A_live_ioa_def:
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  "A_live_ioa == (A_ioa, WF A_ioa {INC})"
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h_abs_def:
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  "h_abs n == n~=0"
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axioms
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MC_result:
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  "validLIOA (A_ioa,WF A_ioa {INC}) (<>[] <%(b,a,c). b>)"
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ML {* use_legacy_bindings (the_context ()) *}
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end