A new implementation for presburger arithmetic following the one suggested in technical report Chaieb Amine and Tobias Nipkow. It is generic an smaller.
the tactic has also changed and allows the abstaction over fuction occurences whose type is nat or int.
(*  Title:      HOL/UNITY/ROOT
    ID:         $Id$
    Author:     Lawrence C Paulson, Cambridge University Computer Laboratory
    Copyright   1998  University of Cambridge
Root file for UNITY proofs.
*)
(*Basic meta-theory*)
time_use_thy "UNITY_Main";
(*Simple examples: no composition*)
time_use_thy "Simple/Deadlock";
time_use_thy "Simple/Common";
time_use_thy "Simple/Network";
time_use_thy "Simple/Token";
time_use_thy "Simple/Channel";
time_use_thy "Simple/Lift";
time_use_thy "Simple/Mutex";
time_use_thy "Simple/Reach";
time_use_thy "Simple/Reachability";
(*Verifying security protocols using UNITY*)
with_path "../Auth" (no_document use_thy) "Public";
with_path "../Auth" time_use_thy "Simple/NSP_Bad";
(*Example of composition*)
time_use_thy "Comp/Handshake";
(*Universal properties examples*)
time_use_thy "Comp/Counter";
time_use_thy "Comp/Counterc";
time_use_thy "Comp/Priority";
time_use_thy "Comp/TimerArray";
(*Allocator example*)
time_use_thy "Comp/Alloc";
time_use_thy "Comp/AllocImpl";
time_use_thy "Comp/Client";
time_use_thy "ELT";  (*obsolete*)