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% -----------------------------------------------------------------------------
% (C) Altran Praxis Limited
% -----------------------------------------------------------------------------
%
% The SPARK toolset is free software; you can redistribute it and/or modify it
% under terms of the GNU General Public License as published by the Free
% Software Foundation; either version 3, or (at your option) any later
% version. The SPARK toolset is distributed in the hope that it will be
% useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
% Public License for more details. You should have received a copy of the GNU
% General Public License distributed with the SPARK toolset; see file
% COPYING3. If not, go to http://www.gnu.org/licenses for a complete copy of
% the license.
%
% =============================================================================
/******** DONE: top-level checker command ********/
done :-
\+ command_arg(to_do, _), /* CFR024 */
nl,
max_conc_no(MAX),
done_range(1,MAX),
fail.
done :-
command_arg(expression, CONCS),
(
CONCS=c#N,
done(N)
;
CONCS=c#N-M,
done_range(N,M)
),
fail.
done :-
all_done,
fail.
done :-
logfact(proved, _),
!,
retractall(do_not_issue_failure_message).
done :-
retract(do_not_issue_failure_message),
!,
retractall(do_not_issue_failure_message).
done :-
write('*** Cannot eliminate any conclusions at present'),
nl,
fail.
done(N) :-
conc(N,X),
infer(X),
write('*** PROVED C'),
print(N),
write(': '),
print(X),
assertz(logfact(proved, conc(N,X))),
retract(conc(N,X)),
case_pointer(CP),
(
on_case(CP,CN,_),
write(' FOR CASE '),
print(CN)
;
true
),
!,
nl, /* CFR024 */
( /* CFR024 */
\+ conc(_, _), /* CFR024 */
auto_done(on), /* CFR024 */
all_done /* CFR024 */
; /* CFR024 */
true /* CFR024 */
), /* CFR024 */
!. /* CFR024 */
/*** ALL_DONE - see if all conclusions at present depth done & act if so ***/
all_done :-
\+ conc(_,_),
case_pointer(CP),
(
CP=0, /* CFR024 */
logfact(proved, vc(_)), /* CFR024 */
! /* CFR024 */
; /* CFR024 */
CP=0,
!,
write('*** VC PROVED -- Well done!'),
nl,
assertz(logfact(proved, all)),
current_vc(VCNAME, _),
assertz(logfact(proved, vc(VCNAME))),
update_vcs_to_prove,
nl, /* CFR025 */
assertz(time_for_new_vc) /* CFR025 */
;
CP>0,
(
on_case(CP, CASE, _),
maybe_add(proved_for_case(CP, CASE)),
fail
;
case(CP, N, F),
\+ proved_for_case(CP, N),
!,
maybe_add(do_not_issue_failure_message),
case(N)
;
subgoal_formula(CP, F, N, METHOD),
write('*** PROVED '),
print(F),
write(' BY '),
print(METHOD),
nl,
CP1 is CP-1,
retractall(case_pointer(_)),
asserta(case_pointer(CP1)),
case_restore(CP), /* ??? */
assertz(logfact(exitframe, CP)),
write('[Exiting depth '), /* CFR024 */
print(CP), /* CFR024 */
write(' proof frame]'), /* CFR024 */
nl, /* CFR024 */
retractall(proved_for_case(CP,_)),
retractall(case(CP,_,_)),
retractall(subgoal_formula(CP,_,_,_)),
clear_up_could_facts,
add_new_hyp(F,1),
(
integer(N),
!,
(
auto_done(on),
!,
done
;
done(N)
)
;
maybe_add(do_not_issue_failure_message)
)
)
), !.
done_range(N,N) :-
done(N),
!.
done_range(N,M) :-
N<M,
( done(N) ; true ),
!,
N1 is N+1,
done_range(N1,M),
!.
update_vcs_to_prove :-
current_vc(VCNAME, VCNUM),
retractall(is_vc(VCNAME)),
retractall(vc(VCNAME,_)),
vcs_to_prove(OLDVCLIST),
delete_number(VCNUM, OLDVCLIST, NEWVCLIST),
retractall(vcs_to_prove(_)),
asserta(vcs_to_prove(NEWVCLIST)),
update_vcs_proved(VCNUM),
!.
delete_number(N, [[N]|REST], REST) :- !.
delete_number(N, [LIST|REST], NEWLIST) :-
append(FRONT, [N|BACK], LIST),
(
FRONT=[],
!,
NEWLIST=[BACK|REST]
;
BACK=[],
!,
NEWLIST=[FRONT|REST]
;
NEWLIST=[FRONT,BACK|REST]
),
!.
delete_number(N, [LIST|REST], [LIST|NEWREST]) :-
(\+ is_in(N, LIST)),
delete_number(N, REST, NEWREST),
!.
update_vcs_proved(NUM) :-
\+ vcs_proved_this_session(_),
!,
asserta(vcs_proved_this_session([[NUM]])),
!.
update_vcs_proved(NUM) :-
vcs_proved_this_session(LIST),
!,
insert_in_vc_list(NUM, LIST, NEW_LIST),
!,
asserta(vcs_proved_this_session(NEW_LIST)),
retract(vcs_proved_this_session(LIST)),
!.
insert_in_vc_list(N, [ListNm1, [Np1|List] | REST], [NewList | REST]) :-
Np1 is N+1,
Nm1 is N-1,
last(ListNm1, Nm1),
append(ListNm1, [N,Np1|List], NewList),
!.
insert_in_vc_list(N, [[Np1|List] | REST], [[N,Np1|List] | REST]) :-
Np1 is N+1,
!.
insert_in_vc_list(N, [ListNm1 | REST], [ListN | REST]) :-
Nm1 is N-1,
last(ListNm1, Nm1),
append(ListNm1, [N], ListN),
!.
insert_in_vc_list(N, [List | REST], [List | NEW_REST]) :-
last(List, HI),
HI < N,
insert_in_vc_list(N, REST, NEW_REST), !.
insert_in_vc_list(N, LIST, [[N]|LIST]) :- !.
%###############################################################################
%END-OF-FILE
|
