| author | nipkow |
| Mon, 13 May 2002 15:27:28 +0200 | |
| changeset 13145 | 59bc43b51aa2 |
| parent 11195 | 65ede8dfe304 |
| child 13785 | e2fcd88be55d |
| permissions | -rw-r--r-- |
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(* Title: HOL/UNITY/Common |
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ID: $Id$ |
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Author: Lawrence C Paulson, Cambridge University Computer Laboratory |
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Copyright 1998 University of Cambridge |
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Common Meeting Time example from Misra (1994) |
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The state is identified with the one variable in existence. |
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From Misra, "A Logic for Concurrent Programming" (1994), sections 5.1 and 13.1. |
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*) |
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Common = SubstAx + |
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consts |
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ftime,gtime :: nat=>nat |
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rules |
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fmono "m <= n ==> ftime m <= ftime n" |
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gmono "m <= n ==> gtime m <= gtime n" |
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fasc "m <= ftime n" |
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gasc "m <= gtime n" |
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constdefs |
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common :: nat set |
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"common == {n. ftime n = n & gtime n = n}"
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maxfg :: nat => nat set |
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"maxfg m == {t. t <= max (ftime m) (gtime m)}"
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end |