Put in minimal simpset to avoid excessive simplification,
just as in revision 1.9 of HOL/indrule.ML
(* Title: HOL/IMP/ROOT.ML
ID: $Id$
Author: Heiko Loetzbeyer, Robert Sandner, Tobias Nipkow
Copyright 1995 TUM
*)
HOL_build_completed; (*Make examples fail if HOL did*)
writeln"Root file for HOL/IMP";
proof_timing := true;
time_use_thy "Expr";
time_use_thy "Transition";
time_use_thy "VC";