renamed former Int.int_induct to Int.int_of_nat_induct, former Presburger.int_induct to Int.int_induct: is more conservative and more natural than the intermediate solution
(* Title: HOL/UNITY/UNITY_Main.thy
Author: Lawrence C Paulson, Cambridge University Computer Laboratory
Copyright 2003 University of Cambridge
*)
header{*Comprehensive UNITY Theory*}
theory UNITY_Main
imports Detects PPROD Follows ProgressSets
uses "UNITY_tactics.ML"
begin
method_setup safety = {*
Scan.succeed (fn ctxt =>
SIMPLE_METHOD' (constrains_tac (clasimpset_of ctxt))) *}
"for proving safety properties"
method_setup ensures_tac = {*
Args.goal_spec -- Scan.lift Args.name_source >>
(fn (quant, s) => fn ctxt => SIMPLE_METHOD'' quant (ensures_tac (clasimpset_of ctxt) s))
*} "for proving progress properties"
end