1		% (c) 2009-2025 Lehrstuhl fuer Softwaretechnik und Programmiersprachen,
2		% Heinrich Heine Universitaet Duesseldorf
3		% This software is licenced under EPL 1.0 (http://www.eclipse.org/org/documents/epl-v10.html)
4
5		:- module(specfile, [
6		specfile_possible_trans_name/2, specfile_possible_trans_name_for_successors/2,
7		specfile_trans/6,
8		prepare_state_for_specfile_trans/3, prepare_state_for_specfile_trans/4,
9		extract_infos_from_prepared_state/2,
10
11		property/2, elementary_prop/2,
12
13		partial_trans/4, specfile_trans_or_partial_trans/7,
14
15		animation_mode/1, set_animation_mode/1, add_animation_minor_mode/1,
16		animation_minor_mode/1, set_animation_minor_mode/1, remove_animation_minor_mode/0,
17		unset_animation_minor_modes/1, reset_animation_minor_modes/1,
18		b_mode/0, z_mode/0, b_or_z_mode/0, b_or_z_mode/1,
19		eventb_mode/0,
20		classical_b_mode/0,
21		csp_mode/0, csp_mode/1,
22		csp_with_bz_mode/0, z_or_tla_minor_mode/0,
23		process_algebra_mode/0,
24		xtl_mode/0,
25		b_syntax_available_for_source/0,
26
27		type_check_csp_and_b/0,
28
29		currently_opened_file/1, % only true for successfully opened files
30		currently_opened_file_status/2, % second parameter: success or failure
31		currently_opened_specification_name/1,
32		%reset_currently_opened_file/0,
33		set_currently_opened_file/1, set_currently_opened_b_file/1,
34		set_failed_to_open_file/1,
35		set_minor_animation_mode_from_file/1,
36		set_currently_opening_file/1,
37		set_currently_opened_package/1,
38		spec_file_has_been_successfully_loaded/0,
39		b_absolute_file_name_relative_to_opened_file/2,
40
41		state_corresponds_to_initialised_b_machine/1, state_corresponds_to_initialised_b_machine/2,
42		state_corresponds_to_fully_setup_b_machine/1, state_corresponds_to_fully_setup_b_machine/2,
43		state_corresponds_to_set_up_constants/1,
44		state_corresponds_to_set_up_constants/2, state_corresponds_to_set_up_constants_only/2,
45		extract_variables_from_state/2, extract_variables_from_state_as_primed/2,
46		current_b_expression/1,
47		get_current_state_for_b_formula/2, get_state_for_b_formula/3,
48
49		get_operation_name/2, get_operation_internal_name/2,
50		translate_operation_name/2,
51		get_operation_arguments/2, get_operation_return_values_and_arguments/3,
52		get_operation_description/2, get_operation_description_for_transition/4,
53		get_operation_description_for_transition_id/3,
54		build_up_b_real_operation/2,
55		expand_const_and_vars/3, expand_const_and_vars_to_full_store/2,
56		expand_to_constants_and_variables/3,
57
58		max_operations_zero_for_operation/1,
59		compute_operation_effect_max/6, % has replaced compute_operation_effect/5
60		create_setup_constants_operation/3,
61		get_internal_representation/1, get_internal_representation/4,
62		get_possible_event/1, get_feasible_event/1,
63		get_possible_language_specific_top_level_event/3,
64		get_specification_description/2,
65		get_local_states_for_operation_transition/4, create_local_store_for_operation/4
66		]).
67
68		:- use_module(tools).
69
70		:- use_module(module_information).
71		:- module_info(group,animator).
72		:- module_info(description,'This module computes transitions and properties depending on the current animator mode.').
73
74		:- use_module(library(lists)).
75		%:- use_module(library(avl)).
76		%:- use_module(library(clpfd)).
77
78		:- use_module(debug).
79		:- use_module(b_interpreter).
80		:- use_module(preferences).
81		:- use_module(self_check).
82		:- use_module(error_manager).
83		:- use_module(translate).
84		:- use_module(succeed_max,[succeed_max_call_id/3]).
85
86		:- use_module(store,[empty_state/1]).
87		:- use_module(bmachine).
88		:- use_module(bsyntaxtree).
89		:- use_module(xtl_interface).
90
91
92		%% :- use_module(delay).
93
94		:- use_module(value_persistance, [load_constants/2]).
95
96		:- set_prolog_flag(double_quotes, codes).
97
98		/* --------------------------------- */
99
100
101
102
103		/* --------------------------------- */
104		/* ANIMATION & TEMPORAL VERIFICATION */
105		/* --------------------------------- */
106
107
108		:- dynamic animation_mode/1, animation_minor_mode/1.
109		% not marking as volatile; otherwise we startup with no animation_mode set
110		% not all parts of ProB can deal with this at the moment
111		%:- volatile animation_mode/1, animation_minor_mode/1.
112
113		animation_mode(b).
114		% possible values: b, csp, xtl, z, csp_and_b, promela
115		% animation_minor_mode: possible values alloy, event_b, tla, z (classical B if no animation_minor_mode fact)
116
117		b_mode :- animation_mode(X), (X=b ; X=csp_and_b).
118		z_mode :- animation_mode(X), (X=b ; X=csp_and_b), animation_minor_mode(z).
119	?	classical_b_mode :- b_mode, (animation_minor_mode(Mode) -> classical_minor_mode(Mode) ; true).
120		classical_minor_mode(rules_dsl).
121
122		eventb_mode :-
123		animation_mode(X), (X=b ; X=csp_and_b),
124		animation_minor_mode(eventb).
125		csp_with_bz_mode :- animation_mode(csp_and_b).
126		z_or_tla_minor_mode :- animation_minor_mode(X), (X=tla ; X=z).
127
128		csp_mode :- animation_mode(X), csp_mode(X).
129		csp_mode(cspm).
130		csp_mode(csp_and_b).
131
132		xtl_mode :- animation_mode(xtl).
133
134		b_or_z_mode :-
135		(animation_mode(X) -> (X=b -> true ; X=csp_and_b)). % basically the same as b_mode
136		b_or_z_mode(b). b_or_z_mode(csp_and_b).
137
138		% is B syntax (ASCII/Unicode available for source files)
139		b_syntax_available_for_source :-
140		b_or_z_mode,
141		(animation_minor_mode(X) -> X=event_b ; true).
142
143		process_algebra_mode :- %Note: also covers xtl (Promela, CCS interpreters; see test 756); used for translating events (tau, tick, io(...))
144		animation_mode(X), X \= b,
145		\+ ((X=xtl, xtl_get_definition_string('PROCESS_ALGEBRA_MODE',false))).
146
147		set_animation_mode(X) :-
148		retractall(animation_mode(_)),
149		remove_animation_minor_mode,
150		assertz(animation_mode(X)).
151
152		set_animation_minor_mode(X) :-
153		remove_animation_minor_mode,
154		assertz(animation_minor_mode(X)).
155		remove_animation_minor_mode :-
156		retractall(animation_minor_mode(_)).
157
158		% use to temporarily unset animation minor mode:
159		:- use_module(library(lists),[maplist/2]).
160		unset_animation_minor_modes(L) :- findall(X,retract(animation_minor_mode(X)),L).
161		reset_animation_minor_modes(L) :- maplist(add_animation_minor_mode,L).
162
163		add_animation_minor_mode(X) :-
164		(animation_minor_mode(X) -> true ; assertz(animation_minor_mode(X))).
165
166
167		:- dynamic currently_opened_file_status/2.
168		:- volatile currently_opened_file_status/2.
169		%currently_opened_file(none).
170
171		:- use_module(bmachine,[b_machine_name/1]).
172		currently_opened_specification_name(Name) :-
173		(b_or_z_mode -> b_machine_name(Name)
174		; currently_opened_file(File),
175		get_modulename_filename(File,Name)
176		).
177
178		reset_currently_opened_file :- retractall(currently_opened_file_status(_,_)).
179		reset_specfile :- reset_currently_opened_file,
180		retractall(animation_minor_mode(_)).
181		:- use_module(eventhandling,[register_event_listener/3]).
182		:- register_event_listener(clear_specification,reset_specfile,
183		'Reset Specfile Currently Opened File.').
184
185		% call if a spec was not loaded from file but from package (e.g., via socket / prob2)
186		set_currently_opened_package(Type) :-
187		set_currently_opened_file(package(Type)).
188
189		% indicates we are in the process of opening a file
190		set_currently_opening_file(File) :-
191		reset_currently_opened_file,
192		assertz(currently_opened_file_status(File,opening)),
193		set_minor_animation_mode_from_file(File).
194
195		:- use_module(tools,[get_filename_extension/2]).
196		set_minor_animation_mode_from_file(File) :-
197		get_filename_extension(File,Extension),
198		file_extension_mode(Extension,Major,Minor),!,
199		animation_mode(CurMajor),
200		(CurMajor=Major
201		-> (animation_minor_mode(CurMinor)
202		-> (CurMinor=Minor -> true
203		; add_warning(specfile,'Minor animation mode incompatible with file:',CurMinor:File)
204		)
205		; Minor=none -> true
206		; set_animation_minor_mode(Minor)
207		)
208		; add_warning(specfile,'Major animation mode incompatible with file:',CurMajor:File)
209		).
210		set_minor_animation_mode_from_file(File) :- add_warning(specfile,'Unknown file extension:',File).
211
212		:- use_module(probsrc(tools_platform), [host_platform/1]).
213		file_extension_mode(mch,b,none). % classical b, could also be csp_and_b
214		file_extension_mode(ref,b,none).
215		file_extension_mode(imp,b,none).
216		file_extension_mode(def,b,none).
217		file_extension_mode(sys,b,none).
218		file_extension_mode(rmch,b,rules_dsl).
219		file_extension_mode(prob,b,none). % Here we cannot infer the mode; TODO: in future store this info in the .prob file
220		file_extension_mode(tla,b,tla).
221		file_extension_mode(fuzz,b,z).
222		file_extension_mode(tex,b,z).
223		file_extension_mode(eventb,b,eventb).
224		file_extension_mode('P',xtl,none).
225		file_extension_mode('p',xtl,none) :- host_platform(windows),
226		add_message(specfile,'Lower-case file extension .p treated as .P for XTL mode').
227		file_extension_mode(als,b,alloy).
228		file_extension_mode(csp,cspm,none).
229		file_extension_mode(cspm,cspm,none).
230
231		% store currently openend specification file and set B minor animation mode
232		set_currently_opened_b_file(File) :-
233		set_currently_opened_file(File),
234		set_minor_animation_mode_from_file(File).
235
236		set_currently_opened_file(File) :-
237		reset_currently_opened_file,
238		assertz(currently_opened_file_status(File,success)).
239
240		set_failed_to_open_file(File) :-
241		reset_currently_opened_file,
242		assertz(currently_opened_file_status(File,failure)).
243
244		currently_opened_file(File) :- currently_opened_file_status(File,success).
245
246
247		:- use_module(tools,[safe_absolute_file_name/3, get_parent_directory/2]).
248		% open a file relateive to the main B file
249		b_absolute_file_name_relative_to_opened_file(File,AbsFileName) :-
250		currently_opened_file_status(MainFileName,_Status), % _Status=failure happens when error during loading
251		get_parent_directory(MainFileName,Directory),
252		safe_absolute_file_name(File,AbsFileName,[relative_to(Directory)]).
253
254		spec_file_has_been_successfully_loaded :- currently_opened_file(_).
255
256		:- use_module(bmachine,[b_machine_has_variables/0]).
257		% true if state corresponds to an initialised B machine
258		state_corresponds_to_initialised_b_machine(const_and_vars(_,_)) :- !,
259		b_or_z_mode.
260		state_corresponds_to_initialised_b_machine(expanded_const_and_vars(_,_,_,_)) :- !,
261		b_or_z_mode.
262		state_corresponds_to_initialised_b_machine(expanded_vars(_,_)) :- !,
263		b_or_z_mode.
264		state_corresponds_to_initialised_b_machine([]).
265		state_corresponds_to_initialised_b_machine([_|_]).
266		state_corresponds_to_initialised_b_machine(csp_and_b(_,BState)) :-
267		csp_with_bz_mode,
268		state_corresponds_to_initialised_b_machine(BState).
269
270
271		% check if state corresponds to an initialised B machine, and if so return expanded State
272		state_corresponds_to_initialised_b_machine(const_and_vars(ConstID,Vars),State) :- !,
273		b_or_z_mode, expand_const_and_vars(ConstID,Vars,State).
274		state_corresponds_to_initialised_b_machine(expanded_const_and_vars(_ConstID,_Vars,FullStore,_),State) :- !,
275		% generated by prepare_state_for_specfile_trans
276		State=FullStore.
277		state_corresponds_to_initialised_b_machine(expanded_vars(FullStore,_),State) :- !,
278		% generated by prepare_state_for_specfile_trans
279		State=FullStore.
280		state_corresponds_to_initialised_b_machine([],[]).
281		state_corresponds_to_initialised_b_machine([H|T],[H|T]).
282		state_corresponds_to_initialised_b_machine(csp_and_b(_,BState),State) :-
283		csp_with_bz_mode,
284		state_corresponds_to_initialised_b_machine(BState,State).
285
286		% check if all variables, constants setup; also allows concrete_constants if no variables exist
287		state_corresponds_to_fully_setup_b_machine(concrete_constants(_)) :- !, b_or_z_mode,
288		\+ b_machine_has_variables.
289		state_corresponds_to_fully_setup_b_machine(X) :- state_corresponds_to_initialised_b_machine(X).
290
291		state_corresponds_to_fully_setup_b_machine(concrete_constants(Constants),State) :- !, b_or_z_mode,
292		\+ b_machine_has_variables, State=Constants.
293		state_corresponds_to_fully_setup_b_machine(X,State) :- state_corresponds_to_initialised_b_machine(X,State).
294
295		% check if we only have constants, no variable values yet
296		state_corresponds_to_set_up_constants_only(root,State) :- !, animation_mode(b),
297		\+ b_machine_has_constants_or_properties, State=[]. % relevant for test 960
298		state_corresponds_to_set_up_constants_only(concrete_constants(Constants),State) :- !,
299		b_or_z_mode, State=Constants.
300		state_corresponds_to_set_up_constants_only(csp_and_b(_,BState),State) :- !,
301		csp_with_bz_mode,
302		state_corresponds_to_set_up_constants_only(BState,State).
303
304		state_corresponds_to_set_up_constants(const_and_vars(_,_)) :- !. % avoid expansion
305		state_corresponds_to_set_up_constants(X) :- state_corresponds_to_set_up_constants(X,_).
306
307		state_corresponds_to_set_up_constants(const_and_vars(ConstID,Vars),State) :- !,
308		b_or_z_mode, expand_const_and_vars(ConstID,Vars,State).
309		state_corresponds_to_set_up_constants(expanded_const_and_vars(_ConstID,_Vars,FullStore,_),State) :- !,
310		% generated by prepare_state_for_specfile_trans
311		State=FullStore.
312		state_corresponds_to_set_up_constants(expanded_vars(FullStore,_),State) :- !,
313		% generated by prepare_state_for_specfile_trans
314		State=FullStore.
315		state_corresponds_to_set_up_constants(concrete_constants(Constants),State) :- !,
316		b_or_z_mode, State=Constants.
317		state_corresponds_to_set_up_constants(csp_and_b(_,BState),State) :- !,
318		csp_with_bz_mode,
319		state_corresponds_to_set_up_constants(BState,State).
320		state_corresponds_to_set_up_constants([],State) :- !, State=[],
321		animation_mode(b).
322		state_corresponds_to_set_up_constants(State,RState) :-
323		animation_mode(b),
324		(State = root -> \+ b_machine_has_constants_or_properties,RState=[] ; RState=State).
325
326		:- use_module(state_space,[current_expression/2]).
327		current_b_expression(CurBState) :-
328		current_expression(_CurID,CurState),
329		state_corresponds_to_set_up_constants(CurState,CurBState).
330
331
332
333		:- use_module(state_space, [current_state_id/1]).
334		:- use_module(bmachine, [determine_type_of_formula/2]).
335		% get a state sufficient to evaluate a given formula (expression or predicate)
336		% it will give an error is the machine is not sufficiently initialised
337		get_current_state_for_b_formula(TypedExpr,BState) :-
338		current_state_id(CurID),
339		get_state_for_b_formula(CurID,TypedExpr,BState).
340		get_state_for_b_formula(StateID,TypedExpr,BState) :-
341		(formula_class(TypedExpr) -> Type=TypedExpr % user already provided formula class
342		; determine_type_of_formula(TypedExpr,Type)), % TODO: extract used ids and only expand those that are required
343		get_state(Type,StateID,TypedExpr,BState).
344
345		formula_class(requires_nothing).
346		formula_class(requires_constants).
347		formula_class(requires_variables).
348
349		:- use_module(probsrc(state_space),[get_constants_state_for_id/3]).
350		get_state(requires_nothing,_ID,_TE,[]).
351		get_state(requires_constants,StateID,TypedExpr,BState) :-
352		(get_constants_state_for_id(StateID,[allow_variable_list],BState) -> true
353		; ajoin(['Please setup constants first, cannot evaluate (in state ',StateID,') :'],Msg),
354		add_error(get_state,Msg,TypedExpr,TypedExpr),fail).
355		get_state(requires_variables,StateID,TypedExpr,BState) :-
356		my_visited_expression(StateID,State),
357		(state_corresponds_to_initialised_b_machine(State,BState) -> true ;
358		ajoin(['Please initialise machine first, cannot evaluate (in state ',StateID,') :'],Msg),
359		add_error(get_state,Msg,TypedExpr,TypedExpr),fail).
360		% TO DO: we could try and get only those identifiers that are really used
361
362		:- use_module(state_space,[visited_expression/2]).
363		my_visited_expression(root,S) :- !,
364		S=root. % ensure we succeed even if no state space set (e.g. when no machine provided to probcli)
365		my_visited_expression(StateID,State) :- visited_expression(StateID,State).
366
367		/* TRANSITIONS */
368
369		:- use_module(tools_meta,[call_residue/2]).
370		% ---------------------------------------------------
371
372
373		% Tries to find successor state for Op in State DB. Fails, if no solution is possible
374		% Input: State DB, Operation Op
375		% Output: DB2 the sucessor state
376		% Residue: Unfinished co-routines (should not happen!)
377		%specfile_trans(DB,Op,DB2,[]) :- !, specfile:i_transition(DB,Op,DB2).
378		specfile_trans(DB,OpName,Op,DB2,TransInfo,Residue) :-
379		% i_transition(DB,OpName,Op,DB2,TransInfo), Residue = []. % is faster, but no residue checking
380		animation_mode(MODE),
381	?	call_residue(i_transition(MODE,DB,OpName,Op,DB2,TransInfo),Residue).
382
383		i_transition(b,State,OpName,Op,NewState,TransInfo) :- !,
384	?	b_trans(State,OpName,Op,NewState,TransInfo).
385		i_transition(xtl,State,OpName,Op,NewState,TransInfo) :- !,
386		xtl_transition(State,Op,NewState,TransInfo), functor(Op,OpName,_).
387		i_transition(cspm,State,_OpName,Op,NewState,[]) :- !,
388		% Note: the OpName is ignored: we cannot make use of it
389		cspm_transition(State,Op,NewState).
390		%i_transition(promela,State,_OpName,Op,NewState,[]) :- !,
391		% promela_transition(State,Op,NewState).
392		% ; MODE=smv -> smv_transition(State,Op,NewState),TransInfo=[]
393		i_transition(csp_and_b,State,OpName,Op,NewState,TransInfo) :- !,
394		% Note: the OpName is either the name of a B operation or '$CSP' (or a variable)
395		csp_and_b_transition(State,OpName,Op,NewState,TransInfo).
396
397
398		% if you call specfile_trans multiple times for the same state, it is
399		% more efficient to call this predicate first once
400		prepare_state_for_specfile_trans(const_and_vars(ConstID,Vars),CurID,R) :- !, %print(expanding_const(ConstID)),nl,
401		R = expanded_const_and_vars(ConstID,Vars,FullStore,Infos),
402		expand_const_and_vars(ConstID,Vars,FullStore), %, print(full(FullStore)),nl.
403		prepare_infos(FullStore,CurID,Infos).
404		prepare_state_for_specfile_trans(FullStore,CurID,R) :- FullStore=[_|_],
405		prepare_infos(FullStore,CurID,Infos), Infos \=[],
406		!,
407		R = expanded_vars(FullStore,Infos).
408		prepare_state_for_specfile_trans(csp_and_b(CSP,BStore),CurID,csp_and_b(CSP,Res)) :- !,
409		prepare_state_for_specfile_trans(BStore,CurID,Res).
410		prepare_state_for_specfile_trans(X,_,X).
411
412		% a version with a memo argument to store expanded constants
413		prepare_state_for_specfile_trans(const_and_vars(ConstID,Vars),CurID,MEMO,R) :- !, %print(expanding_const(ConstID)),nl,
414		R = expanded_const_and_vars(ConstID,Vars,FullStore,Infos),
415		(nonvar(MEMO),MEMO = [ConstID/ConstantsStore]
416		% constants have already been previously extracted; e.g., in model_checker loop
417		-> %tools_printing:print_term_summary(memo(ConstID,ConstantsStore)),nl,
418		append(Vars,ConstantsStore,FullStore) % simply reuse expanded constants in MEMO
419		% used to be constants first, but has to be compatible with b_initialise_machine2 and expand_const_and_vars/3
420		; % expand_const_and_vars/3 inlined (so as to obtain ConstantsStore
421		visited_expression(ConstID,concrete_constants(ConstantsStore)), %% This can take a while if the Constants are big !
422		% print(no_memo(ConstID,MEMO)),tools_printing:print_term_summary(ConstantsStore),nl,
423		append(Vars,ConstantsStore,FullStore),
424		(var(MEMO)
425		-> MEMO=[ConstID/ConstantsStore] % store expanded constants to avoid unpacking again
426		; true)
427		), %, print(full(FullStore)),nl.
428		prepare_infos(FullStore,CurID,Infos).
429		prepare_state_for_specfile_trans(FullStore,CurID,_,R) :- FullStore=[_|_],
430		prepare_infos(FullStore,CurID,Infos), Infos \=[], !,
431		R = expanded_vars(FullStore,Infos).
432		prepare_state_for_specfile_trans(csp_and_b(CSP,BStore),CurID,MEMO,csp_and_b(CSP,Res)) :- !,
433		prepare_state_for_specfile_trans(BStore,CurID,MEMO,Res).
434		prepare_state_for_specfile_trans(X,_,_,X). % TODO: prepare infos as well if we have no constants
435
436		:- use_module(state_packing,[pack_state/2, get_packed_b_state_with_uncompressed_lists/2]).
437		% store some operation independent infos which are useful
438		prepare_infos(FullStore,CurID,Infos) :- CurID \= root,
439		(get_preference(try_operation_reuse,false)
440		-> Infos = []
441		% TO DO: check if we should enable this: get_preference(use_state_packing,true)
442		% TODO: we could check if there are operations which do not write all variables
443		; Infos=[packed_state/PackedList, state_id/CurID],
444		(CurID \= unknown, state_space:packed_visited_expression(CurID,PS),
445		get_packed_b_state_with_uncompressed_lists(PS,PackedList) % replace '$cst_vars' and compressed lists
446		-> true %,write('+')
447		; format('prepare_infos for state ~w: need to pack_values~n',[CurID]), % should ideally not happen
448		pack_state(FullStore,PS), % precompute state packing; will be re-used multiple times
449		get_packed_b_state_with_uncompressed_lists(PS,PackedList)
450		)
451		).
452
453		% extract pre-computed infos
454		extract_infos_from_prepared_state(expanded_const_and_vars(_,_,_,Infos),Res) :- !, Res=Infos.
455		extract_infos_from_prepared_state(expanded_vars(_,Infos),Res) :- !, Res=Infos.
456		extract_infos_from_prepared_state(_,[]).
457
458		remove_infos_from_prepared_state(expanded_const_and_vars(C,V,_,_),Res) :- !, Res=const_and_vars(C,V).
459		remove_infos_from_prepared_state(expanded_vars(V,_),R) :- !, R=V.
460		remove_infos_from_prepared_state(S,S).
461
462		% extract initialised variables from a state
463		extract_variables_from_state(const_and_vars(_,V),R) :- !,R=V.
464		extract_variables_from_state(expanded_const_and_vars(_,V,_,_),R) :- !,R=V.
465		extract_variables_from_state(expanded_vars(V,_),R) :- !,R=V.
466		extract_variables_from_state([],[]).
467		extract_variables_from_state([H|T],[H|T]).
468
469		:- use_module(probsrc(btypechecker),[prime_atom0/2]). % add $0 at end of variable
470		prime_binding(bind(ID,V),bind(PID,V)) :- prime_atom0(ID,PID).
471
472		extract_variables_from_state_as_primed(SrcState,PrimedVarBindings) :-
473		extract_variables_from_state(SrcState,VarVals),
474		maplist(prime_binding,VarVals,PrimedVarBindings).
475
476
477		/* can be attempted if trans fails to attempt to use partially computed transitions */
478		partial_trans(DB,Op,DB2,Residue) :-
479		call_residue(partial_i_transition(DB,Op,DB2),Residue).
480
481		partial_i_transition(root,'$partial_setup_constants',concrete_constants(ConstantsStore)) :-
482		animation_mode(b),
483		set_error_context(operation('$partial_setup_constants',root)),
484		b_interpreter:b_partial_set_up_concrete_constants(ConstantsStore).
485
486		% a predicate which automatically calls partial_trans :
487		specfile_trans_or_partial_trans(DB,OpName,Op,DB2,TransInfo,Residue,Partial) :-
488		if(specfile_trans(DB,OpName,Op,DB2,TransInfo,Residue),Partial=false,
489		(OpName='$setup_constants', % OpName is often an input argument here
490		TransInfo=[], Partial = true,
491		partial_trans(DB,Op,DB2,Residue))).
492
493		/* build up skeletons of possible operations; to be used before time_out call is made */
494		% currently only used in zmq worker.pl
495		specfile_possible_trans_name(State,OpName) :- animation_mode(MODE),
496		(MODE=b -> b_possible_trans_name(State,OpName)
497		; MODE = csp_and_b -> csp_b_possible_trans_name(State,OpName)
498		; setup_transition_skeleton(MODE,OpName) /* TO DO: add more possible skeletons */
499		).
500
501		% only set up skeletons if it is worth it for computing all successors
502		% e.g., currently it is not worth it to setup skeletons for either CSP or CSP||B (due to renaming,... we cannot predict which parts of a CSP process can be excluded)
503		specfile_possible_trans_name_for_successors(State,OpName) :- animation_mode(MODE),
504		(MODE=b
505	?	-> b_possible_trans_name(State,OpName)
506		; setup_transition_skeleton(MODE,OpName)
507		).
508
509		setup_transition_skeleton(_,_). /* TO DO: add more possible skeletons ? */
510
511		:- use_module(library(random)).
512		b_possible_trans_name(root,OpName) :- !,
513		(b_machine_has_constants_or_properties
514		-> OpName = '$setup_constants'
515		; OpName = '$initialise_machine').
516		b_possible_trans_name(concrete_constants(_),OpName) :- !, OpName = '$initialise_machine'.
517		b_possible_trans_name(_State,OpName) :-
518		(preferences:preference(randomise_operation_order,true),random(1,3,1)
519		-> b_machine_operation_names_in_reverse_order(OpName) ; true),
520		%b_get_machine_operation(OpName,_Res,_Params,_,_,_).
521	?	b_top_level_feasible_operation(OpName). % TO DO: we could link also with cbc feasibility analysis if carried out
522		% we could check: b_operation_cannot_modify_state(OpName) given a preference, in particular for SAFETY_MODEL_CHECK when operation already covered
523
524		csp_b_possible_trans_name(csp_and_b_root,OpName) :- !,
525		(b_machine_has_constants_or_properties
526		-> OpName = 'tau($setup_constants)'
527		; OpName = 'tau($initialise_machine)').
528		csp_b_possible_trans_name(concrete_constants(_),OpName) :- !,
529		OpName = 'tau($initialise_machine)'.
530		csp_b_possible_trans_name(State,OpName) :-
531		b_possible_trans_name(State,OpName).
532		% TO DO: add non-synchronised channels
533
534		% --------------
535
536		:- use_module(probcspsrc(haskell_csp),[channel_type_list/2, symbol/4]).
537		:- use_module(debug).
538		% check whether a currently open CSP is type compatible with a loaded B machine
539		type_check_csp_and_b :- animation_mode(csp_and_b), debug_println(9,type_check_csp_and_b),
540		b_get_machine_operation(ChannelOpName,Res,Params,_,_,_), append(Params,Res,ParamsRes),
541		channel_type_list(ChannelOpName,CSPTypeList),
542		% TO DO: also check B variable names which match channel name
543		debug_println(9,checking_synchronised_channel(ChannelOpName,ParamsRes,CSPTypeList)),
544		l_check_compatibility(ParamsRes,CSPTypeList,ChannelOpName),
545		fail.
546		type_check_csp_and_b.
547
548		%convert_csp_type_to_list(type(T),R) :- convert_csp_type_to_list2(T,R).
549		%convert_csp_type_to_list2(dotUnitType,[]).
550		%convert_csp_type_to_list2(dotTupleType(T),T).
551
552		l_check_compatibility([],[],_) :- !.
553		l_check_compatibility([B|BT],[CSP|CSPT],ChannelOpName) :- !, check_compatibility(B,CSP,ChannelOpName),
554		l_check_compatibility(BT,CSPT,ChannelOpName).
555		l_check_compatibility([],CSP,ChannelOpName) :- !,
556		add_error(type_check_csp_and_b,'CSP Channel has too many parameters: ', ChannelOpName:CSP).
557		l_check_compatibility(B,[],ChannelOpName) :- !,
558		print('* CSP Channel has too few parameters: '), print(ChannelOpName),nl,
559		print('* B Arguments will be ignored: '), l_print_bexpr_or_subst(B),nl.
560		%add_error(type_check_csp_and_b,'CSP Channel has too few parameters: ', ChannelOpName:B).
561
562		check_compatibility(b(identifier(ID),TYPE,INFO),CSP_TYPE,ChannelOpName) :- !,
563		(type_ok(TYPE,CSP_TYPE) -> true ;
564		% TO DO: pretty print B and CSP Types
565		add_error(type_check_csp_and_b,'Incompatible types between B and CSP: ',ChannelOpName:ID:(TYPE:CSP_TYPE),b(identifier(ID),TYPE,INFO))
566		).
567		check_compatibility(B,CSP,ChannelOpName) :- !,
568		add_internal_error('Illegal types: ',check_compatibility(B,CSP,ChannelOpName)).
569
570		% TO DO: needs to be refined much more;
571		type_ok(Type,CSPType) :-
572		(type_ok2(Type,CSPType) -> true
573		; add_error(type_check_csp_and_b,'Cannot be converted (B:CSP): ',Type:CSPType),fail).
574		type_ok2(boolean,X) :- !, is_csp_boolean_type(X).
575		type_ok2(integer,X) :- !, is_csp_integer_type(X).
576		type_ok2(string,CSP) :- !,is_csp_global_set_type(CSP,string).
577		type_ok2(set(T),CSP) :- !, is_csp_set_type(CSP,T).
578		% TO DO: what if we have set(couple(integer,T)) instead of seq(T) ?
579		% rye
580		% check set(couple(integer,T)) (seq type) in B
581		type_ok2(seq(T),CSP) :- !, is_csp_seq_type(CSP,T).
582		type_ok2(couple(A,B),CSP) :- !, is_csp_couple_type(CSP,A,B).
583		type_ok2(global(GS),CSP) :- !,is_csp_global_set_type(CSP,GS).
584		type_ok2(X,Y) :- print(unkown(X,Y)),nl.
585
586		is_csp_couple_type(setValue([na_tuple([A|Rest])|_]),TA,TB) :- type_ok(TA,setValue([A])),
587		check_rest_couple_els(Rest,TB).
588		is_csp_couple_type(typeTuple([A|Rest]),TA,TB) :- type_ok(TA,A), check_rest_couple(Rest,TB).
589
590		check_rest_couple_els([B],TB) :- !, type_ok(TB,setValue([B])).
591		check_rest_couple_els([B1|BRest],couple(TB1,TBRest)) :- type_ok(TB1,setValue([B1])),
592		check_rest_couple_els(BRest,TBRest).
593		check_rest_couple([B],TB) :- !, type_ok(TB,B).
594		check_rest_couple([B1|BRest],couple(TB1,TBRest)) :- type_ok(TB1,B1),
595		check_rest_couple(BRest,TBRest).
596
597		% rye
598		% check if it is couple(integer, T) type and return T in 2nd arguments
599		couple_int(couple(integer, T), T). % possible sequence
600
601		% rye: it's not correct to check only Head
602		% % for example, for CSP type, {{}, {(1,2),(2,3)}}. Its head is emptyset, but the second one is set of tuple
603		is_csp_set_type('Set'([H|_]),Type) :- type_ok(Type,H). % just check Head
604		% check the 2nd element in set in case the 1st is emptyset
605		is_csp_set_type(setValue([_|T]),Type) :-
606		T = [H1 | _], !,
607		% if it is set(couple(integer, T)), it can be a sequence type
608		(couple_int(Type, TH1) -> is_csp_seq_type(setValue(T), TH1)
609		; type_ok(Type,H1)
610		). % check the 2nd
611		% if it is only one element in set, just check the head
612		is_csp_set_type(setValue([H|T]),Type) :-
613		(couple_int(Type, TH1) -> is_csp_seq_type(setValue([H|T]), TH1)
614		; type_ok(Type,H)
615		). % just check Head
616
617		is_csp_seq_type('Seq'(H),Type) :- type_ok(Type,H).
618		is_csp_seq_type(setValue([H|_]),Type) :- H=list(L), is_csp_list(L,Type).
619		is_csp_list([],_).
620		is_csp_list([H|_],Type) :- type_ok(Type,setValue([H])).
621
622		is_csp_boolean_type(boolType).
623		is_csp_boolean_type(setValue([H|_])) :- is_csp_boolean_value(H).
624		is_csp_boolean_value(true).
625		is_csp_boolean_value(false).
626
627		is_csp_integer_type(intType).
628		is_csp_integer_type(setFromTo(_,_)).
629		is_csp_integer_type(setFrom(_)).
630		is_csp_integer_type(setValue([int(_)|_])).
631
632		is_csp_global_set_type(dataType(_),_GS). % TO DO CHECK MEMBERS
633		is_csp_global_set_type(setValue([]),_GS). % TO DO CHECK MEMBERS
634		is_csp_global_set_type(setValue([_|_]),_GS). % TO DO CHECK MEMBERS
635
636		% --------------
637
638
639		:- use_module(bmachine,[b_get_machine_operation/4]).
640		:- use_module(bsets_clp,[tuple_of/3]).
641		% compute transitions for a CSP || B specification
642		% Note: the OpName is either the name of a B machine operation (even if hidden) or '$CSP' (useful for ltsmin)
643		csp_and_b_transition(root,OpName,Op,NewState,TransInfo) :- !,
644		Op = start_cspm_MAIN, OpName=Op, NewState = csp_and_b_root,TransInfo = [].
645		csp_and_b_transition(csp_and_b_root,OpName,Trans,NewState,TransInfo) :- !,
646		Trans = tau(Op), OpName = '$CSP',
647		b_trans(root,_,Op,InitialBState,TransInfo),
648		(InitialBState = concrete_constants(_)
649		-> NewState = InitialBState
650		; csp_initialisation_for_b(InitialCSPState),
651		NewState = csp_and_b(InitialCSPState,InitialBState)
652		).
653		csp_and_b_transition(concrete_constants(C),OpName,Trans,NewState,TransInfo) :- !,
654		Trans = tau(Op), OpName = '$CSP',
655		b_trans(concrete_constants(C),_,Op,InitialBState,TransInfo),
656		csp_initialisation_for_b(InitialCSPState),
657		NewState = csp_and_b(InitialCSPState,InitialBState).
658		csp_and_b_transition(csp_and_b(CSPState,BState),OpName,EventVisibleToUser,csp_and_b(NewCSP,NewB),TransInfo) :-
659		!,
660		csp_transition_for_b(CSPState,ChOpName,ChArgs,CSPAction,NewCSP),
661		% TO DO: split up csp_transition_for_b: into two parts; second part converts datatypes and only called if linking op exists
662		%% print(csp_trans(ChOpName,ChArgs)),nl, %%
663		length(ChArgs,Len), length(OpArgs,Len),
664		b_transition_for_csp(ChOpName,CSPAction,ChArgs,OpArgs,BState,OpName,Operation,NewB,TransInfo),
665		hide_csp_event(CSPAction,Operation,EventVisibleToUser).
666		csp_and_b_transition(State,'$CSP',Op,NewState,[]) :-
667		% we have a pure CSP state: use CSP-M transition
668		cspm_transition(State,Op,NewState).
669
670		:- use_module(bmachine,[b_is_variable/1,b_is_constant/1]).
671		% compute the B counterpart for a CSP transition:
672		b_transition_for_csp(ChOpName,_CSPAction,ChArgs,OpArgs,BState,OpName,Operation,NewB,TransInfo) :-
673		build_up_b_operation_for_csp(ChOpName,OpArgs,Operation),
674		!,
675		OpName = ChOpName,
676		%% print_message(trying_b_trans(Operation,ChArgs,OpArgs)), %%
677		(get_preference(try_operation_reuse,false)
678		-> generate_b_operationargs_from_csp(ChArgs,OpArgs),
679		b_trans(BState,OpName,Operation,NewB,TransInfo)
680		;
681		% compute B transition without parameters so that we can cache
682		b_trans(BState,OpName,Operation,NewB,TransInfo),
683		% and unify afterwards
684		generate_b_operationargs_from_csp(ChArgs,OpArgs)
685		).
686		%%, print_message(csp_btrans(Operation)), %%.
687		b_transition_for_csp(ChOpName,_CSPAction,ChArgs,OpArgs,BState,OpName,Operation,NewB,TransInfo) :-
688		OpName = ChOpName,
689		(b_is_variable(ChOpName) ; b_is_constant(ChOpName)),
690		%% print(probing(ChOpName)),nl,
691		expand_const_and_vars_to_full_store(BState,FBState),
692		try_lookup_value_in_store_and_global_sets(ChOpName,FBState,IdValue),
693		!,
694		remove_infos_from_prepared_state(BState,NewB),
695		TransInfo=[],
696		/* interpret as probing operation: get value of var,cst,SET */
697		generate_b_operationargs_from_csp(ChArgs,OpArgs),
698		(OpArgs=[SingleVal]
699		-> SingleVal = IdValue, Operation='-->'(ChOpName,[IdValue])
700		; OpArgs=[Val1,Val2],
701		tuple_of(Val1,Val2,IdValue), /* from bsets_clp, use exact_element_of ??? */
702		OpCall =.. [ChOpName,Val1],
703		Operation='-->'(OpCall,[Val2])
704		).
705		b_transition_for_csp(_ChOpName,CSPAction,_ChArgs,_OpArgs,BState,OpName,Operation,NewB,TransInfo) :-
706		OpName = '$CSP', % all CSP events grouped together
707		remove_infos_from_prepared_state(BState,NewB),
708		TransInfo=[],
709		/* no B operation of the name; could be tau or tick or extra comm channel */
710		%Op1 =.. [ChOpName|OpArgs],
711		Operation = CSPAction. % removed csp(.) wrapper [for LTL model checker]
712
713		hide_csp_event(CSPAction,_,EventVisibleToUser) :-
714		symbol('HIDE_CSPB',_,Span,_),!, % if there is a HIDE_CSPB definition then we do MAIN [{| HIDE_CSPB |}] B_MACHINE \ {| HIDE_CSPB |}
715		haskell_csp:evaluate_argument(val_of('HIDE_CSPB',Span),EvCList),
716		% print(hide(EvCList,CSPAction)),nl,
717		haskell_csp:expand_channel_pattern_expression(EvCList,ECList,no_loc_info_available),
718		haskell_csp:cspm_hide_action(CSPAction,omega,ECList, Span, EventVisibleToUser,_).
719		hide_csp_event(_CSPAction,Operation,EventVisibleToUser) :-
720		% get_preference(csp_event_visible_to_user,true) -> EventVisibleToUser = CSPAction
721		EventVisibleToUser = Operation.
722
723		build_up_b_operation_for_csp(OpName,OpArgs,Operation) :- %print(csp(OpName,OpArgs,Operation)),nl,
724		nonvar(OpName),
725		b_get_machine_operation(OpName,Res,Params,_), %print(get_machine_op(OpName,Res,Params)),nl,
726		specfile:generate_args(OpArgs,Params,Res, BArgs,BResults,OpName), %print(gen_args(BArgs,BResults)),nl,
727		% TO DO: either also extract types from Params, Res or better write a static checker that tests that the B operation and CSP channel types are compatible
728		safe_univ(Op1,[OpName|BArgs]), %print(op1(Op1)),nl,
729		(BResults = [] -> Operation = Op1 ; Operation = '-->'(Op1,BResults)).
730
731		:- use_module(bmachine,[b_get_machine_operation_for_animation/6]).
732		build_up_b_real_operation(OpName,Operation) :-
733		b_get_machine_operation_for_animation(OpName,Res,Params,_,_,true), %true==TopLevel
734		length(Params,Len), length(OpArgs,Len),
735		length(Res,RLen), length(BResults,RLen),
736		safe_univ(Op1,[OpName|OpArgs]),
737		(BResults = [] -> Operation = Op1 ; Operation = '-->'(Op1,BResults)).
738
739		generate_args([],[],Res,[],BRes,_) :- length(Res,L), length(BRes,L).
740		generate_args([],[_Param|T],Res,[_|TA],BRes,OpName) :-
741		generate_args([],T,Res,TA,BRes,OpName).
742		generate_args([CSPArg|TC],[Param|T],Res,[CSPArg|TA],BRes,OpName) :- check_type_for_id(CSPArg,Param,OpName),
743		generate_args(TC,T,Res,TA,BRes,OpName).
744		generate_args([CSPArg|TC],[],[ReturnParam|TRes],[],[CSPArg|TBRes],OpName) :-
745		check_type_for_id(CSPArg,ReturnParam,OpName),
746		generate_args(TC,[],TRes,[],TBRes,OpName).
747		generate_args([H|T],[],[],[],[],OpName) :-
748		add_error(specfile,'CSP provides extra arguments: ',OpName:[H|T]).
749
750		check_type_for_id(Val,TID,OpName) :- get_texpr_type(TID,Type),
751		check_type(Type,Val,OpName:TID).
752
753		:- block check_type(?,-,?).
754		check_type(boolean,pred_true,_) :- !.
755		check_type(boolean,pred_false,_) :- !.
756		check_type(integer,int(_),_) :- !.
757		check_type(string,string(_),_) :- !.
758		check_type(global(GS),fd(_,GS),_) :- !.
759		check_type(couple(A,B),(VA,VB),OID) :- !, check_type(A,VA,OID), check_type(B,VB,OID).
760		check_type(set(_T),[],_) :- !.
761		check_type(set(_T),closure(_,_,_),_) :- !. % TO DO: check type signature of closure
762		check_type(set(T),[H|_],OID) :- !, check_type(T,H,OID).
763		check_type(set(T),avl_set((node(Y,_,_,_L,_R))),OID) :- !, check_type(T,Y,OID).
764		check_type(seq(T),V,OID) :- !, check_type(set(couple(integer,T)),V,OID).
765		% TO DO: record, freetype ; but do not appear in translation from CSP to B yet
766		check_type(Type,Value,OpName:TID) :-
767		def_get_texpr_id(TID,ID),
768		add_error(check_type_for_id,'Illegal CSP value for argument: ',OpName:ID:type(Type):value(Value)),
769		fail.
770
771		get_operation_internal_name(Op,Name) :- var(Op),!,
772		add_error(get_operation_internal_name,'Variable Transition: ',Op), Name=Op.
773		get_operation_internal_name('$initialise_machine',N) :- !, N='$initialise_machine'.
774		get_operation_internal_name('$setup_constants',N) :- !, N='$setup_constants'.
775		get_operation_internal_name('$partial_setup_constants',N) :- !, N='$partial_setup_constants'.
776		get_operation_internal_name(Op,Name) :- get_operation_name(Op,Name).
777
778		is_setup_constants_internal_name('$setup_constants').
779		is_setup_constants_internal_name('$partial_setup_constants').
780
781		% tool to get the basic operation/channel/event name of a transition:
782		get_operation_name(Op,Name) :- var(Op),!, add_error(get_operation_name,'Variable Transition: ',Op), Name=Op.
783		get_operation_name('-->'(F,_),N) :- !, functor(F,N,_).
784		%get_operation_name(io([Action|_],proc(_Nr,_PROC),_SPAN),F) :-
785		% animation_mode(promela),!,functor(Action,F,_).
786		get_operation_name(io(_V,Ch,_SPAN),N) :- csp_mode,!, functor(Ch,N,_).
787		get_operation_name(FullOperation,Name) :- functor(FullOperation,Functor,_),
788		translate_operation_name(Functor,Name).
789
790		get_operation_arguments(Op,Args) :- var(Op),!, add_error(get_operation_arguments,'Variable Transition: ',Op), Args=[].
791		get_operation_arguments('-->'(F,_ReturnValues),Args) :- !, F =.. [_|Args].
792		%get_operation_arguments(io([_Action|V],proc(_Nr,_PROC),_SPAN),Args) :-
793		% animation_mode(promela),!,Args=V.
794		get_operation_arguments(io(V,_Ch,_SPAN),Args) :- csp_mode,!, Args = V.
795		get_operation_arguments(FullOperation,Args) :- FullOperation =.. [_|Args].
796
797		get_operation_return_values_and_arguments('-->'(F,ReturnValues),ReturnValues,Args) :- !,
798		F =.. [_|Args].
799		get_operation_return_values_and_arguments(Op,[],Args) :- get_operation_arguments(Op,Args).
800
801		translate_operation_name('$initialise_machine',T) :- !,T='INITIALISATION'.
802		translate_operation_name('$setup_constants',T) :- !,T='SETUP_CONSTANTS'.
803		translate_operation_name('$partial_setup_constants',T) :- !,T='PARTIAL_SETUP_CONSTANTS'.
804		%translate_operation_name(InternalName,Res) :- !, Res=InternalName.
805		translate_operation_name(X,X).
806
807		:- use_module(bmachine,[b_get_operation_description/2]).
808		% get a textual description of a transition, based on description pragma
809		get_operation_description(OpTerm,Desc) :- b_or_z_mode,
810		get_operation_name(OpTerm,OpName),
811		b_get_operation_description(OpName,Desc).
812		% in future we could possible use operation parameter values to adapt description
813
814		:- use_module(state_space,[transition/4,transition_info/2]).
815		get_operation_description_for_transition_id(StateId,TransitionId,Desc) :-
816		transition(StateId,OpTerm,TransitionId,NextId), !,
817		(xtl_mode % TODO: allow other modes?
818		-> transition_info(TransitionId,description(Desc))
819		; get_operation_description_for_transition(StateId,OpTerm,NextId,Desc)
820		).
821		get_operation_description_for_transition_id(StateId,TransitionId,_) :-
822		format('No transition from state ~w with id ~w!~n', [StateId,TransitionId]),
823		fail.
824
825		:- use_module(probsrc(b_interpreter),[b_compute_explicit_epression_no_wf/6]).
826		:- use_module(probsrc(bmachine),[get_operation_description_template_expr/2]).
827		% get a description for operation from a given state; to do: we could provide destination state
828		get_operation_description_for_transition(StateId,OpTerm,NextId,Desc) :- xtl_mode, !,
829		transition(StateId,OpTerm,TransitionId,NextId),
830		transition_info(TransitionId,description(Desc)).
831		get_operation_description_for_transition(StateId,OpTerm,NextId,Desc) :- b_or_z_mode,
832		get_operation_name(OpTerm,OpName),
833		get_operation_description_template_expr(OpName,TemplateStringExpr),
834		visited_expression(NextId,State),
835		state_corresponds_to_initialised_b_machine(State,BState1),
836		visited_expression(StateId,BeforeState),
837		state_corresponds_to_initialised_b_machine(BeforeState,BState0),
838		extract_variables_from_state_as_primed(BState0,PrimedBefore),
839		append(PrimedBefore,BState1,BState),
840
841		% TODO: use NextId and add StateId as $0 vars
842		% maplist(create_primed_binding,InVariablesState,PrimedVars),
843		% append(PrimedVars,Out,PredState),
844		!,
845		get_local_state_for_operation_transition(OpName,OpTerm,LocalState),
846		%write(local_state(OpName,OpTerm,LocalState)),nl,
847		% TODO: process errors better
848		if(b_compute_explicit_epression_no_wf(TemplateStringExpr,LocalState,BState,string(SD),
849		operation_description(OpName),0),
850		Desc=SD,
851		(get_operation_description(OpTerm,D), ajoin(['Error evaluating template: ',D],Desc))
852		).
853		get_operation_description_for_transition(_StateId,OpTerm,_NextStateId,Desc) :-
854		get_operation_description(OpTerm,Desc).
855
856		get_local_state_for_operation_transition(OpName,OperationTerm,LocalState) :-
857		get_local_states_for_operation_transition(OpName,OperationTerm,ParaStore,ResultStore),
858		append(ResultStore,ParaStore,LocalState).
859
860		% get local states for parameter values and result values extracted from a B operation transition term
861		get_local_states_for_operation_transition(OpName,OperationTerm,ParaStore,ResultStore) :- b_or_z_mode,!,
862		get_operation_return_values_and_arguments(OperationTerm,ReturnValues,ParaValues),
863		(b_get_machine_operation_for_animation(OpName,Results,Parameters,_Body,_OType,_TopLevel,OpPos)
864		-> true
865		; is_setup_constants_internal_name(OpName) -> Results=[], Parameters=[], OpPos=unknown
866		; add_error(specfile,'Unrecognized operation: ',OpName),
867		Results=[], Parameters=[], OpPos=unknown
868		),
869		def_get_texpr_ids(Parameters,OpParameterNames), % also includes virtual parameters (show_eventb_any_arguments)
870		(ParaValues=[]
871		-> ParaStore=[]
872		; (OpParameterNames=[], ParaValues=[_|_]
873		-> (get_preference(show_eventb_any_arguments,true)
874		-> add_message(specfile,'Ignoring additional parameters for:',OpName,OpPos)
875		; add_warning(specfile,'Ignoring additional parameters for:',OpName,OpPos)
876		),
877		ParaStore = []
878		; create_local_store_for_operation(OpParameterNames,ParaValues,OpName,ParaStore)
879		)
880		),
881		(ReturnValues=[]
882		-> ResultStore = []
883		; %b_get_machine_operation_result_names(OpName,OpResults),
884		def_get_texpr_ids(Results,OpResults),
885		create_local_store_for_operation(OpResults,ReturnValues,OpName,ResultStore)
886		).
887		get_local_states_for_operation_transition(_OpName,OperationTerm,ParaStore,ResultStore) :- % not B mode
888		ResultStore = [],
889		get_operation_return_values_and_arguments(OperationTerm,ReturnValues,ParaValues),
890		ReturnValues = [], % should always succeed
891		gen_para_bind(ParaValues,1,ParaStore). % create [bind(para1,Val1),...]
892
893		gen_para_bind([],_,[]).
894		gen_para_bind([H|T],Nr,[bind(ParaNr,H)|BT]) :- ajoin([para,Nr],ParaNr),
895		N1 is Nr+1,
896		gen_para_bind(T,N1,BT).
897
898		% create a store from parameter names and values:
899		create_local_store_for_operation([],[],_,Store) :- !, Store=[].
900		create_local_store_for_operation([Name|NT],[Val|VT],OpName,[bind(Name,Val)|StoreT]) :- !,
901		create_local_store_for_operation(NT,VT,OpName,StoreT).
902		create_local_store_for_operation([Name|NT],[],OpName,Store) :- !,
903		ajoin(['Missing values for operation ',OpName,':'],Msg),
904		add_error(specfile,Msg,[Name|NT]),
905		Store = [].
906		create_local_store_for_operation(_,V,OpName,Store) :-
907		ajoin(['Too many values for operation ',OpName,':'],Msg),
908		add_error(specfile,Msg,V),
909		Store = [].
910
911		:- use_module(library(between),[between/3]).
912
913		b_trans(State,OpName,Operation,NewState,PathInfo) :-
914	?	compute_operation_effect_max(State,OpName,Operation,NewState,PathInfo,_Max).
915
916		:- use_module(store,[store_updates_and_normalise/3]).
917
918		compute_operation_effect_max([],OpName,Operation,NewState,PathInfo,Max) :-
919	?	compute_operation_updates_on_expanded_store([],OpName,Operation,Updates,PathInfo,Max),
920		store_updates_and_normalise(Updates,[],NewState).
921		compute_operation_effect_max([H|T],OpName,Operation,NewState,PathInfo,Max) :-
922	?	compute_operation_updates_on_expanded_store([H|T],OpName,Operation,Updates,PathInfo,Max),
923		store_updates_and_normalise(Updates,[H|T],NewState).
924		compute_operation_effect_max(const_and_vars(ConstID,Vars),OpName,Operation,ResultingStore,PathInfo,Max) :-
925		prepare_state_for_specfile_trans(const_and_vars(ConstID,Vars),unknown,R),
926		%print(expanded_const_and_vars(ConstID)),nl,
927		compute_operation_effect_max(R,OpName,Operation,ResultingStore,PathInfo,Max).
928		compute_operation_effect_max(expanded_const_and_vars(ID,Vars,FullStore,Infos),OpName,Operation,NewState,PathInfo,Max) :-
929	?	compute_operation_updates_on_expanded_store(expanded_const_and_vars(ID,Vars,FullStore,Infos),
930		OpName,Operation,Updates,PathInfo,Max),
931		NewState = const_and_vars(ID,NewVars),
932		store_updates_and_normalise(Updates,Vars,NewVars).
933		compute_operation_effect_max(expanded_vars(FullStore,Infos),OpName,Operation,NewState,PathInfo,Max) :-
934		compute_operation_updates_on_expanded_store(expanded_vars(FullStore,Infos),
935		OpName,Operation,Updates,PathInfo,Max),
936		store_updates_and_normalise(Updates,FullStore,NewState).
937
938		compute_operation_effect_max(concrete_constants(ConstantsStore),'$initialise_machine',OpInit,ResultingStore,PathInfo,Max) :-
939		get_max_enablings_for_init(Max,'$initialise_machine',MaxForCall),
940	?	succeed_max_call_id('$initialise_machine',
941		b_interpreter:b_initialise_machine(ConstantsStore,InitialVars,InitialStore,PathInfo),MaxForCall),
942		create_initialisation_operation(InitialVars,OpInit),
943		(\+ preferences:preference(symmetry_mode,flood), /* TO DO : improve permutation to allow using const_and_vars optimisation */
944	?	visited_expression(ConstID,concrete_constants(ConstantsStore))
945		-> ResultingStore = const_and_vars(ConstID,InitialVars) /* avoid storing constant values again */
946		; ResultingStore = InitialStore).
947		compute_operation_effect_max(root,'$setup_constants',OpSetup,concrete_constants(FilteredConstantsStore),[],Max) :-
948		b_machine_has_constants_or_properties,
949		get_max_enablings_for_init(Max,'$setup_constants',MaxForCall),
950	?	compute_constants(ConstantsStore,MaxForCall,Complete),
951		create_setup_constants_operation(ConstantsStore,Complete,OpSetup),
952		%%print_message('FOUND_CONSTANTS'(OpName)),
953		(get_preference(filter_unused_constants,true) % possibly disable if VisB or Custom Graph Definitions exist
954		-> exclude(unused_binding,ConstantsStore,FilteredConstantsStore)
955		; FilteredConstantsStore=ConstantsStore).
956		compute_operation_effect_max(root,'$initialise_machine',OpInit,InitialStore,PathInfo,Max) :-
957		\+ b_machine_has_constants_or_properties,
958		get_max_enablings_for_init(Max,'$initialise_machine',MaxForCall),
959		empty_state(EmptyState),
960		succeed_max_call_id('$initialise_machine',
961		b_interpreter:b_initialise_machine(EmptyState,InitialVars,InitialStore,PathInfo),MaxForCall),
962		create_initialisation_operation(InitialVars,OpInit).
963
964
965		unused_binding(bind(C,_)) :- bmachine:b_is_unused_constant(C).
966
967		compute_constants(ConstantsStore,_Max,C) :-
968		% check if values have been computed and stored into a file before -- if yes, use them
969		load_constants(Stores,MaxReached),!,
970		C = complete_properties, % TODO: check that only complete properties stored or that we store this info
971		choose_loaded_solution(Stores,ConstantsStore,MaxReached).
972		compute_constants(ConstantsStore,Max,Complete) :-
973		% print('Searching for valid CONSTANTS'),nl,!,
974	?	succeed_max_call_id('$setup_constants',b_interpreter:b_set_up_concrete_constants(ConstantsStore,Complete),Max).
975
976		choose_loaded_solution(Stores,ConstantsStore,_MaxReached) :-
977		member(ConstantsStore,Stores).
978		choose_loaded_solution(_Stores,_ConstantsStore,true) :-
979		% provoke the setting of the "maximum reached flag"
980		succeed_max_call_id('$setup_constants',member(_,_),1),fail.
981
982		expand_const_and_vars_to_full_store(root,R) :- !,R=[].
983		expand_const_and_vars_to_full_store(concrete_constants(ConstantsStore),FullStore) :- !,
984		ConstantsStore = FullStore.
985		expand_const_and_vars_to_full_store(const_and_vars(ConstID,Vars),FullStore) :- !,
986		expand_const_and_vars(ConstID,Vars,FullStore).
987		expand_const_and_vars_to_full_store(expanded_const_and_vars(_ConstID,_Vars,ExpStore,_),FullStore) :- !,
988		FullStore = ExpStore.
989		expand_const_and_vars_to_full_store(expanded_vars(ExpStore,_),FullStore) :- !,
990		FullStore = ExpStore.
991		expand_const_and_vars_to_full_store(csp_and_b(_,BState),FullStore) :- !,
992		expand_const_and_vars_to_full_store(BState,FullStore).
993		expand_const_and_vars_to_full_store(R,R).
994
995		expand_const_and_vars(ConstID,Vars,FullStore) :-
996		visited_expression(ConstID,concrete_constants(ConstantsStore)),
997		%% This can take a while if the Constants are big !
998		% print('exp: '),tools_printing:print_term_summary(ConstantsStore),nl,
999		append(Vars,ConstantsStore,FullStore). % used to be Constants first, now consistent with b_initialise_machine2,
1000		% b_initialise_machine2 puts constants at end to make sharing of complete tail-list easier for successor states
1001
1002		expand_to_constants_and_variables(root,[],[]).
1003		expand_to_constants_and_variables(concrete_constants(ConstStore),ConstStore,[]).
1004		expand_to_constants_and_variables(const_and_vars(ConstID,VarStore),ConstStore,VarStore) :-
1005		visited_expression(ConstID,concrete_constants(ConstStore)).
1006		expand_to_constants_and_variables([],[],[]).
1007		expand_to_constants_and_variables([H|T],[],[H|T]).
1008		expand_to_constants_and_variables(csp_and_b(_,BState),ConstStore,VarStore) :-
1009		expand_to_constants_and_variables(BState,ConstStore,VarStore).
1010
1011		:- use_module(extrasrc(b_operation_cache),[compute_operation_on_expanded_store_cache/6]).
1012
1013		% compute operation effect on a store where all constants have been put into the environment
1014		compute_operation_updates_on_expanded_store(InState,OpName,Operation,NewState,PathInfo,Max) :-
1015		get_preference(try_operation_reuse,V), V \= false,
1016		b_or_z_mode, % now works with CSP || B
1017		%\+ animation_minor_mode(eventb), % projection used to confuse Event-B interpreter, see test 2138
1018		!,
1019		get_max_enablings_per_operation(Max,OpName,MaxForCall),
1020		compute_operation_on_expanded_store_cache(OpName,Operation,InState,NewState,PathInfo,MaxForCall).
1021		compute_operation_updates_on_expanded_store(Store,OpName,Operation,Updates,PathInfo,Max) :-
1022		extract_full_store(Store,FullStore),!,
1023	?	compute_operation_on_expanded_store2(FullStore,OpName,Operation,Updates,PathInfo,Max).
1024		compute_operation_updates_on_expanded_store(InState,OpName,Operation,Updates,PathInfo,Max) :-
1025	?	compute_operation_on_expanded_store2(InState,OpName,Operation,Updates,PathInfo,Max).
1026
1027		compute_operation_on_expanded_store2(InState,OpName,Operation,Updates,PathInfo,Max) :-
1028		get_max_enablings_per_operation(Max,OpName,MaxForCall),
1029	?	succeed_max_call_id(OpName,
1030		b_interpreter:b_execute_top_level_operation_update(OpName,Operation,InState,Updates,PathInfo),
1031		MaxForCall).
1032
1033		extract_full_store(expanded_const_and_vars(_,_,FS,_),Res) :- !, Res=FS.
1034		extract_full_store(expanded_vars(FS,_),Res) :- !, Res=FS.
1035
1036		create_initialisation_operation(_InitialVars,'$initialise_machine').
1037
1038		create_setup_constants_operation(_ConstantVars,complete_properties,R) :- !, R='$setup_constants'.
1039		create_setup_constants_operation(_ConstantVars,_,'$partial_setup_constants').
1040
1041		:- use_module(bmachine,[b_get_machine_operation_max/2]). % MAX_OPERATIONS_... DEFINITIONS
1042		get_max_enablings_per_operation_aux(OpName,RMax,RandomisedRestart) :-
1043		b_get_machine_operation_max(OpName,Max),
1044		!,
1045		(Max<0 -> RMax is -Max, RandomisedRestart=true ; RMax=Max, RandomisedRestart=false).
1046		get_max_enablings_per_operation_aux(_OpName,Max,false) :-
1047		preferences:preference(maxNrOfEnablingsPerOperation,Max).
1048
1049		max_operations_zero_for_operation(OpName) :-
1050		b_or_z_mode,
1051		b_top_level_operation(OpName),
1052		(b_get_machine_operation_max(OpName,0) -> true
1053		; get_preference(maxNrOfEnablingsPerOperation,0)).
1054
1055		get_max_enablings_per_operation(Max,OpName,MaxForCall) :-
1056		(var(Max) -> get_max_enablings_per_operation_aux(OpName,Max,RandomisedRestart) ; RandomisedRestart=false),
1057		(RandomisedRestart=true,
1058		get_preference(randomise_enumeration_order,true)
1059		-> % we succeed Max times with the value 1, thus forcing a randomised restart
1060		MaxForCall=1, between(1,Max,Retry), format('Randomised Restart ~w for ~w~n',[Retry,OpName])
1061		; % we succeed once with the value Max
1062		MaxForCall is Max).
1063
1064		get_max_enablings_for_init(Max,Op,MaxForCall) :-
1065		(var(Max) -> get_preference(maxNrOfInitialisations,Max) ; true),
1066		(Max>1,
1067		get_preference(randomisedRestartInitalisations,true),
1068		get_preference(randomise_enumeration_order,true)
1069		-> % we succeed Max times with the value 1, thus forcing a randomised restart
1070		MaxForCall=1, between(1,Max,Retry), format('Randomised Restart ~w for ~w~n',[Retry,Op])
1071		; % we succeed once with the value Max
1072		MaxForCall=Max).
1073
1074		/* PROPERTIES */
1075
1076		property(const_and_vars(ConstID,Vars),Property) :- b_or_z_mode,
1077		expand_const_and_vars(ConstID,Vars,FullStore),!,
1078		property(FullStore,Property).
1079		property(csp_and_b(CSPState,BState),Property) :- animation_mode(csp_and_b),!,
1080		%% print(checking_csp_and_b(CSPState)),nl,
1081		expand_const_and_vars_to_full_store(BState,FBState),
1082		(xtl_interface:cspm_property(CSPState,Property) ;
1083		b_property(FBState,Property)).
1084		property(State,Property) :- animation_mode(AM),
1085		(AM = b -> b_property(State,Property)
1086		; AM=xtl -> xtl_interface:xtl_property(State,Property)
1087		; AM=cspm -> xtl_interface:cspm_property(State,Property)
1088		; AM=csp_and_b -> b_property(State,Property) % State should be root
1089		).
1090
1091		%b_property(const_and_vars(ConstID,Vars),Prop) :- !,
1092		% expand_const_and_vars(ConstID,Vars,FullStore),
1093		% b_property(FullStore,Prop).
1094		b_property(root,Prop) :- !, b_preference_par(PARA,Op,VAL), Prop=.. [Op,PARA,VAL].
1095		b_property([H|T],non_ground(Var)) :- debug:debug_mode(on),
1096		member(bind(Var,Val),[H|T]),\+(ground(Val)).
1097		b_property([H|T],Prop) :- elementary_prop([H|T],Prop).
1098		b_property([],Prop) :- elementary_prop([],Prop).
1099		b_property(concrete_constants(DB),Prop) :- elementary_prop(DB,Prop).
1100
1101
1102
1103		:- use_module(preferences).
1104		:- use_module(b_global_sets,[b_global_set/1, b_fd_card/2,inferred_minimum_global_set_cardinality/2,
1105		inferred_maximum_global_set_cardinality/2, unfixed_deferred_set/1]).
1106
1107		% preference values shown as properties of the root node
1108		b_preference_par('MAXINT','=',MaxInt) :- get_preference(maxint,MaxInt).
1109		b_preference_par('MININT','=',MinInt) :- get_preference(minint,MinInt).
1110		b_preference_par(card(GlobalSet),Op,Card) :-
1111		b_global_set(GlobalSet),
1112		b_fd_card(GlobalSet,RCard),
1113		% provide feedback if unfixed_deferred_set
1114		(inferred_maximum_global_set_cardinality(GlobalSet,MaxCard),
1115		(inferred_minimum_global_set_cardinality(GlobalSet,MinCard) -> true ; MinCard=1),
1116		MinCard \= MaxCard,
1117		Op = ':', Card = '..'(MinCard,MaxCard)
1118
1119		;
1120
1121		inferred_minimum_global_set_cardinality(GlobalSet,MinCard),
1122		\+ (inferred_maximum_global_set_cardinality(GlobalSet,_)),
1123		Op='>=',Card=MinCard % show minimum cardinality info
1124
1125		;
1126
1127		Op= '=', (unfixed_deferred_set(GlobalSet)
1128		-> ajoin([RCard,' (assumed for deferred set)'],Card) ; Card=RCard)
1129		).
1130
1131		/* --------------------------------------------------------- */
1132
1133
1134		elementary_prop(DB,Prop) :-
1135		member(bind(Var,Val),DB), %print(var_prop(Var)),nl_time,
1136		elementary_prop3(Val,Var,Prop).
1137
1138		:- use_module(custom_explicit_sets,[is_avl_relation/1,is_avl_partial_function/1,get_first_avl_elements/4, avl_approximate_size/3]).
1139		elementary_prop3(Val,Var,Prop) :- var(Val),!, Prop = '='(Var,'_VAR_').
1140		elementary_prop3(avl_set(Avl),Var,Prop) :- !,
1141		(show_avl_set(Avl) % \+ custom_explicit_sets:is_avl_sequence(Avl))
1142		-> elementary_fun_prop(avl_set(Avl),Var,Prop)
1143		; elementary_var_prop(avl_set(Avl),Var,Prop)).
1144		elementary_prop3([H|T],Var,Prop) :- H=(_,_),
1145		get_preference(show_function_tuples_in_property,true),!,
1146		elementary_fun_prop([H|T],Var,Prop).
1147		elementary_prop3(Val,Var,Prop) :- elementary_var_prop(Val,Var,Prop).
1148
1149		show_avl_set(AVL) :- get_preference(show_function_tuples_in_property,true),
1150		is_avl_relation(AVL),
1151		avl_approximate_size(AVL,0,Size), Size < 257, % only the first 30 will be shown by get_relation_element anyway
1152		is_avl_partial_function(AVL).
1153
1154
1155		:- use_module(bmachine,[b_is_variable/2]).
1156		elementary_var_prop(Val,Var,Prop) :-
1157		% TODO: use translate:translate_bvalue_for_expression/3
1158		animation_minor_mode(tla),!,
1159		( identifier_has_tla_type(Var,TlaType) ->
1160		translate_bvalue_with_tlatype(Val,TlaType,Text)
1161		;
1162		translate_bvalue(Val,Text)),
1163		Prop = '='(Var,Text).
1164		elementary_var_prop(Val,Var,Prop) :-
1165		(var_cst_type(Var,Type)
1166		-> translate_bvalue_with_type_and_limit(Val,Type,320,Text)
1167		; translate_bvalue_with_type_and_limit(Val,any,320,Text)), % translate_properties_with_limit uses 320 Limit
1168		Prop = '='(Var,Text).
1169
1170		identifier_has_tla_type(Id,Type) :-
1171		get_texpr_id(TId,Id),
1172		(b_get_machine_constants(Ids)
1173		;b_get_machine_variables(Ids)),
1174		member(TId,Ids),!,
1175		get_texpr_info(TId,Infos),
1176		memberchk(tla_type(Type),Infos).
1177		% to do: use b_is_variable + translate_bvalue_with_type
1178		elementary_fun_prop(Val,Var,Prop) :-
1179		simple(Prop), % will only succeed if Prop is var or atom; translate_bexpression will raise error if Prop is compound
1180		nonvar(Val),
1181		(var_cst_type(Var,Type),dom_range_type(Type,Dom,Ran) -> true ; Type=any,Dom=any, Ran=any),
1182		get_relation_element(Val,X,Y), % Show value in form: Var(X) = Y
1183		create_texpr(identifier(Var),Type,[],Fun),
1184		create_value(X,Dom,Arg),
1185		create_texpr(function(Fun,Arg),Ran,[],Lhs),
1186		create_value(Y,Ran,Rhs),
1187		create_texpr(equal(Lhs,Rhs),pred,[],Expr),
1188		translate_bexpression_with_limit(Expr,80,Prop).
1189
1190		var_cst_type(Name,Type) :- (b_is_variable(Name,Type) ; b_is_constant(Name,Type)).
1191		dom_range_type(seq(R),integer,R).
1192		dom_range_type(set(couple(D,R)),D,R).
1193
1194		get_relation_element(avl_set(A),X,Y) :- custom_explicit_sets:is_avl_relation(A),
1195		!, %preferences:preference(expand_avl_upto,Limit),
1196		Limit=30, % reduced limit, as now we can inspect with evaluation view
1197		get_first_avl_elements(A,Limit,Els,CutOff),
1198		(member((X,Y),Els), X\=term(_)
1199		;
1200		CutOff=not_all, X='...', Y='...').
1201		get_relation_element(Value,X,Y) :-
1202		member((X,Y),Value). /* otherwise we have a record structure */
1203
1204		create_value('...',_,R) :- !, R = b(string('...'),string,[]).
1205		create_value(X,T,R) :-
1206		create_texpr(value(X),T,[],R).
1207
1208
1209		:- use_module(bmachine,[b_show_machine_representation/4]).
1210		:- use_module(probcspsrc(haskell_csp_analyzer),[get_internal_csp_representation/1]).
1211		get_internal_representation(X) :- get_internal_representation(X,true,false,none).
1212		get_internal_representation(X,AdditionalInfo,UnsetMinorMode,Typing) :- animation_mode(AM),
1213		get_internal_aux(AM,X,AdditionalInfo,UnsetMinorMode,Typing).
1214		get_internal_aux(b,X,AdditionalInfo,UnsetMinorMode,Typing) :- !,
1215		b_show_machine_representation(X,AdditionalInfo,UnsetMinorMode,Typing).
1216		% UnsetMinorMode=true means we try and generate classical B syntax
1217		get_internal_aux(cspm,X,_,_,_) :- !, get_internal_csp_representation(X).
1218		get_internal_aux(csp_and_b,Res,AdditionalInfo,UnsetMinorMode,Typing) :- !,
1219		append("CSP||B - B Part only",X,Res),
1220		b_show_machine_representation(X,AdditionalInfo,UnsetMinorMode,Typing).
1221		get_internal_aux(_,X,_,_,_) :- X="Internal representation only available in B or CSP mode".
1222
1223
1224		:- use_module(probcspsrc(haskell_csp),[channel/2]).
1225		:- use_module(bmachine,[b_top_level_operation/1, b_top_level_feasible_operation/1]).
1226		get_possible_event(OpName) :- b_or_z_mode,
1227		%b_is_operation_name(OpName).
1228	?	b_top_level_operation(OpName).
1229		get_possible_event(Channel) :- csp_mode,
1230		channel(Channel,_).
1231		% what about csp_and_b mode ?
1232
1233		get_feasible_event(OpName) :- b_or_z_mode,
1234		%b_is_operation_name(OpName).
1235	?	b_top_level_feasible_operation(OpName).
1236		get_feasible_event(Channel) :- csp_mode,
1237		channel(Channel,_).
1238
1239
1240		get_possible_language_specific_top_level_event(OpName,ResultNames,ParameterNames) :-
1241		b_or_z_mode,!,
1242		get_possible_b_top_level_event(OpName,ResultNames,ParameterNames).
1243		get_possible_language_specific_top_level_event(Channel,unknown,unknown) :- csp_mode,
1244		channel(Channel,_).
1245
1246		get_possible_b_top_level_event('$setup_constants',[],Ids) :-
1247		b_machine_has_constants_or_properties,
1248		b_get_machine_constants(TIds), maplist(get_texpr_id,TIds,Ids).
1249		get_possible_b_top_level_event('$initialise_machine',[],Ids) :-
1250		b_get_machine_variables(TIds), maplist(get_texpr_id,TIds,Ids).
1251		get_possible_b_top_level_event(OpName,ResultNames,ParameterNames) :-
1252		b_top_level_operation(OpName),
1253		%b_get_machine_operation(OpName,Results,RealParameters,_RealBody,_OType,_OpPos),
1254		b_get_machine_operation_for_animation(OpName,Results,AllParameters,_RealBody,_OType,_TL),
1255		maplist(get_texpr_id,Results,ResultNames),
1256		maplist(get_texpr_id,AllParameters,ParameterNames).
1257
1258		% obtain a textual description of specification category names
1259		get_specification_description(Category,Name) :-
1260		animation_mode(Mode),
1261		(animation_minor_mode(Minor) -> true ; Minor = none), % there could be several minor modes !
1262		(get_specific_description(Mode,Minor,Category,N) -> Name=N
1263		; get_default_description(Category,N) -> Name = N
1264		; add_error(get_specification_description,'Unknown category: ',Category),
1265		Name=Category).
1266
1267		get_specific_description(cspm,_,C,N) :- get_csp_description(C,N).
1268		get_specific_description(b,eventb,C,N) :- get_eventb_description(C,N).
1269		get_specific_description(b,tla,C,N) :- get_tla_description(C,N).
1270		get_specific_description(b,alloy,C,N) :- get_alloy_description(C,N).
1271
1272		get_csp_description(operations,'CHANNELS').
1273		get_csp_description(operation,'CHANNEL').
1274		get_csp_description(assertions,'CSP_ASSERTIONS').
1275		get_csp_description(machine,'CSP_SPECIFICATION').
1276		get_csp_description(operations_lc,'events').
1277
1278		get_tla_description(properties,'ASSUME').
1279		get_tla_description(machine,'MODULE').
1280		get_tla_description(operation,'ACTION'). % no key word
1281		get_tla_description(operations,'ACTIONS'). % no key word
1282		get_tla_description(operations_lc,'actions').
1283
1284		get_eventb_description(properties,'AXIOMS').
1285		get_eventb_description(assertions,'THEOREMS').
1286		get_eventb_description(operations,'EVENTS').
1287		get_eventb_description(operation,'EVENT').
1288		get_eventb_description(operations_lc,'events').
1289		get_eventb_description(machine,'MODEL').
1290
1291		get_alloy_description(machine,'MODULE').
1292		get_alloy_description(sets,'SIGNATURES'). % abstract
1293		get_alloy_description(operations,'RUNS').
1294		get_alloy_description(operation,'RUN').
1295
1296		get_default_description(constraints,'CONSTRAINTS').
1297		get_default_description(properties,'PROPERTIES').
1298		get_default_description(assertions,'ASSERTIONS').
1299		get_default_description(invariant,'INVARIANT').
1300		get_default_description(invariants,'INVARIANTS').
1301		get_default_description(operations,'OPERATIONS').
1302		get_default_description(operation,'OPERATION').
1303		get_default_description(operations_lc,'operations').
1304		get_default_description(machine,'MACHINE').
1305		get_default_description(constants,'CONSTANTS').
1306		get_default_description(variables,'VARIABLES').
1307		get_default_description(initialisation,'INITIALISATION').
1308		get_default_description(sets,'SETS').
1309		get_default_description(goal,'GOAL').
1310		get_default_description(definition,'DEFINITION').
1311		get_default_description(definitions,'DEFINITIONS').
1312		get_default_description(variants,'VARIANTS').