1		% (c) 2009-2026 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		sequent_prover_mode/0,
26		b_syntax_available_for_source/0,
27
28		type_check_csp_and_b/0,
29
30		currently_opened_file/1, % only true for successfully opened files
31		currently_opened_file_status/2, % second parameter: success or failure
32		currently_opened_specification_name/1,
33		%reset_currently_opened_file/0,
34		set_currently_opened_file/1, set_currently_opened_b_file/1,
35		set_failed_to_open_file/1,
36		set_minor_animation_mode_from_file/1,
37		set_currently_opening_file/1,
38		set_currently_opened_package/1,
39		spec_file_has_been_successfully_loaded/0,
40		b_absolute_file_name_relative_to_opened_file/2,
41
42		state_corresponds_to_initialised_b_machine/1, state_corresponds_to_initialised_b_machine/2,
43		state_corresponds_to_fully_setup_b_machine/1, state_corresponds_to_fully_setup_b_machine/2,
44		state_corresponds_to_set_up_constants/1,
45		state_corresponds_to_set_up_constants/2, state_corresponds_to_set_up_constants_only/2,
46		extract_variables_from_state/2, extract_variables_from_state_as_primed/2,
47		current_b_expression/1,
48		get_current_state_for_b_formula/2, get_state_for_b_formula/3,
49
50		get_operation_name/2, get_operation_internal_name/2,
51		translate_operation_name/2,
52		get_operation_arguments/2, get_operation_return_values_and_arguments/3,
53		get_operation_description/2, get_operation_description_for_transition/4,
54		get_operation_description_for_transition_id/3,
55		build_up_b_real_operation/2,
56		expand_const_and_vars/3, expand_const_and_vars_to_full_store/2,
57		expand_to_constants_and_variables/3,
58
59		get_specific_time_out_for_operation/2,
60		get_specific_max_operations_for_operation/2,
61		max_operations_zero_for_operation/1,
62		max_operations_zero_for_setup_constants/0, max_operations_zero_for_initialisation/0,
63		compute_operation_effect_max/6, % has replaced compute_operation_effect/5
64		create_setup_constants_operation/3,
65		get_internal_representation/1, get_internal_representation/4,
66		get_possible_event/1, get_feasible_event/1,
67		get_possible_language_specific_top_level_event/3,
68		get_specification_description/2,
69		get_local_state_for_operation_transition/3,
70		get_local_states_for_operation_transition/4, create_local_store_for_operation/4
71		]).
72
73		:- use_module(tools).
74
75		:- use_module(module_information).
76		:- module_info(group,animator).
77		:- module_info(description,'This module computes transitions and properties depending on the current animator mode.').
78
79		:- use_module(library(lists)).
80		%:- use_module(library(avl)).
81		%:- use_module(library(clpfd)).
82
83		:- use_module(debug).
84		:- use_module(b_interpreter).
85		:- use_module(preferences).
86		:- use_module(self_check).
87		:- use_module(error_manager).
88		:- use_module(translate).
89		:- use_module(succeed_max,[succeed_max_call_id/3]).
90
91		:- use_module(store,[empty_state/1]).
92		:- use_module(bmachine).
93		:- use_module(bsyntaxtree).
94		:- use_module(xtl_interface).
95
96
97		%% :- use_module(delay).
98
99		:- use_module(value_persistance, [load_constants/2]).
100
101		:- set_prolog_flag(double_quotes, codes).
102
103		/* --------------------------------- */
104
105
106
107
108		/* --------------------------------- */
109		/* ANIMATION & TEMPORAL VERIFICATION */
110		/* --------------------------------- */
111
112
113		:- dynamic animation_mode/1, animation_minor_mode/1.
114		% not marking as volatile; otherwise we startup with no animation_mode set
115		% not all parts of ProB can deal with this at the moment
116		%:- volatile animation_mode/1, animation_minor_mode/1.
117
118		animation_mode(b).
119		% possible values: b, csp, xtl, z, csp_and_b, promela
120		% animation_minor_mode: possible values alloy, event_b, tla, z (classical B if no animation_minor_mode fact)
121
122		b_mode :- animation_mode(X), (X=b ; X=csp_and_b).
123		z_mode :- animation_mode(X), (X=b ; X=csp_and_b), animation_minor_mode(z).
124	?	classical_b_mode :- b_mode, (animation_minor_mode(Mode) -> classical_minor_mode(Mode) ; true).
125		classical_minor_mode(rules_dsl).
126
127		eventb_mode :-
128		animation_mode(X), (X=b ; X=csp_and_b),
129		animation_minor_mode(eventb).
130		csp_with_bz_mode :- animation_mode(csp_and_b).
131		z_or_tla_minor_mode :- animation_minor_mode(X), (X=tla ; X=z).
132
133		csp_mode :- animation_mode(X), csp_mode(X).
134		csp_mode(cspm).
135		csp_mode(csp_and_b).
136
137		xtl_mode :- animation_mode(xtl).
138		sequent_prover_mode :- animation_mode(xtl), animation_minor_mode(sequent_prover).
139
140		b_or_z_mode :-
141		(animation_mode(X) -> (X=b -> true ; X=csp_and_b)). % basically the same as b_mode
142		b_or_z_mode(b). b_or_z_mode(csp_and_b).
143
144		% is B syntax (ASCII/Unicode available for source files)
145		b_syntax_available_for_source :-
146		b_or_z_mode,
147		(animation_minor_mode(X) -> X=event_b ; true).
148
149		process_algebra_mode :- %Note: also covers xtl (Promela, CCS interpreters; see test 756); used for translating events (tau, tick, io(...))
150		animation_mode(X), X \= b,
151		\+ ((X=xtl, xtl_get_definition_string('PROCESS_ALGEBRA_MODE',false))).
152
153		set_animation_mode(X) :-
154		retractall(animation_mode(_)),
155		remove_animation_minor_mode,
156		assertz(animation_mode(X)).
157
158		set_animation_minor_mode(X) :-
159		remove_animation_minor_mode,
160		assertz(animation_minor_mode(X)).
161		remove_animation_minor_mode :-
162		retractall(animation_minor_mode(_)).
163
164		% use to temporarily unset animation minor mode:
165		:- use_module(library(lists),[maplist/2]).
166		unset_animation_minor_modes(L) :- findall(X,retract(animation_minor_mode(X)),L).
167		reset_animation_minor_modes(L) :- maplist(add_animation_minor_mode,L).
168
169		add_animation_minor_mode(X) :-
170		(animation_minor_mode(X) -> true ; assertz(animation_minor_mode(X))).
171
172
173		:- dynamic currently_opened_file_status/2.
174		:- volatile currently_opened_file_status/2.
175		%currently_opened_file(none).
176
177		:- use_module(bmachine,[b_machine_name/1]).
178		currently_opened_specification_name(Name) :-
179		(b_or_z_mode -> b_machine_name(Name)
180		; currently_opened_file(File),
181		get_modulename_filename(File,Name)
182		).
183
184		reset_currently_opened_file :- retractall(currently_opened_file_status(_,_)).
185		reset_specfile :- reset_currently_opened_file,
186		retractall(animation_minor_mode(_)).
187		:- use_module(eventhandling,[register_event_listener/3]).
188		:- register_event_listener(clear_specification,reset_specfile,
189		'Reset Specfile Currently Opened File.').
190
191		% call if a spec was not loaded from file but from package (e.g., via socket / prob2)
192		set_currently_opened_package(Type) :-
193		set_currently_opened_file(package(Type)).
194
195		% indicates we are in the process of opening a file
196		set_currently_opening_file(File) :-
197		reset_currently_opened_file,
198		assertz(currently_opened_file_status(File,opening)),
199		set_minor_animation_mode_from_file(File).
200
201		:- use_module(tools,[get_filename_extension/2]).
202		set_minor_animation_mode_from_file(File) :-
203		get_filename_extension(File,Extension),
204		file_extension_mode(Extension,Major,ExpectedMinor),!,
205		animation_mode(CurMajor),
206		(CurMajor=Major
207		-> (animation_minor_mode(CurMinor)
208		-> (CurMinor=ExpectedMinor -> true
209		; member(CurMinor,ExpectedMinor) -> true % is amongst the valid options
210		; add_warning(specfile,'Minor animation mode incompatible with file: ',CurMinor:File)
211		)
212		; ExpectedMinor=none -> true
213		; member(none,ExpectedMinor) -> true
214		; set_animation_minor_mode(ExpectedMinor)
215		)
216		; add_warning(specfile,'Major animation mode incompatible with file: ',CurMajor:File)
217		).
218		set_minor_animation_mode_from_file(File) :- add_warning(specfile,'Unknown file extension: ',File).
219
220		:- use_module(probsrc(tools_platform), [host_platform/1]).
221		file_extension_mode(mch,b,none). % classical b, could also be csp_and_b
222		file_extension_mode(ref,b,none).
223		file_extension_mode(imp,b,none).
224		file_extension_mode(def,b,none).
225		file_extension_mode(sys,b,none).
226		file_extension_mode(rmch,b,rules_dsl).
227		file_extension_mode(prob,b,[none,tla]). % Here we cannot infer the mode; TODO: in future store this info in the .prob file
228		file_extension_mode(tla,b,tla).
229		file_extension_mode(fuzz,b,z).
230		file_extension_mode(tex,b,z).
231		file_extension_mode(eventb,b,eventb).
232		file_extension_mode(pl,xtl,none). % can be proof obligation files (sequent_prover minor mode)
233		file_extension_mode(probpo,xtl,sequent_prover). % proof obligation files (sequent_prover minor mode)
234		file_extension_mode('P',xtl,none).
235		file_extension_mode('p',xtl,none) :- host_platform(windows),
236		add_message(specfile,'Lower-case file extension .p treated as .P for XTL mode').
237		file_extension_mode(als,b,alloy).
238		file_extension_mode(cnf,b,none).
239		file_extension_mode(csp,cspm,none).
240		file_extension_mode(cspm,cspm,none).
241
242		% store currently openend specification file and set B minor animation mode
243		set_currently_opened_b_file(File) :-
244		set_currently_opened_file(File),
245		set_minor_animation_mode_from_file(File).
246
247		set_currently_opened_file(File) :-
248		reset_currently_opened_file,
249		assertz(currently_opened_file_status(File,success)).
250
251		set_failed_to_open_file(File) :-
252		reset_currently_opened_file,
253		assertz(currently_opened_file_status(File,failure)).
254
255		currently_opened_file(File) :- currently_opened_file_status(File,success).
256
257
258		:- use_module(tools,[safe_absolute_file_name/3, get_parent_directory/2]).
259		% open a file relateive to the main B file
260		b_absolute_file_name_relative_to_opened_file(File,AbsFileName) :-
261		currently_opened_file_status(MainFileName,_Status), % _Status=failure happens when error during loading
262		get_parent_directory(MainFileName,Directory),
263		safe_absolute_file_name(File,AbsFileName,[relative_to(Directory)]).
264
265		spec_file_has_been_successfully_loaded :- currently_opened_file(_).
266
267		:- use_module(bmachine,[b_machine_has_variables/0]).
268		% true if state corresponds to an initialised B machine
269		state_corresponds_to_initialised_b_machine(const_and_vars(_,_)) :- !,
270		b_or_z_mode.
271		state_corresponds_to_initialised_b_machine(expanded_const_and_vars(_,_,_,_)) :- !,
272		b_or_z_mode.
273		state_corresponds_to_initialised_b_machine(expanded_vars(_,_)) :- !,
274		b_or_z_mode.
275		state_corresponds_to_initialised_b_machine([]).
276		state_corresponds_to_initialised_b_machine([_|_]).
277		state_corresponds_to_initialised_b_machine(csp_and_b(_,BState)) :-
278		csp_with_bz_mode,
279		state_corresponds_to_initialised_b_machine(BState).
280
281
282		% check if state corresponds to an initialised B machine, and if so return expanded State
283		state_corresponds_to_initialised_b_machine(const_and_vars(ConstID,Vars),State) :- !,
284		b_or_z_mode, expand_const_and_vars(ConstID,Vars,State).
285		state_corresponds_to_initialised_b_machine(expanded_const_and_vars(_ConstID,_Vars,FullStore,_),State) :- !,
286		% generated by prepare_state_for_specfile_trans
287		State=FullStore.
288		state_corresponds_to_initialised_b_machine(expanded_vars(FullStore,_),State) :- !,
289		% generated by prepare_state_for_specfile_trans
290		State=FullStore.
291		state_corresponds_to_initialised_b_machine([],[]).
292		state_corresponds_to_initialised_b_machine([H|T],[H|T]).
293		state_corresponds_to_initialised_b_machine(csp_and_b(_,BState),State) :-
294		csp_with_bz_mode,
295		state_corresponds_to_initialised_b_machine(BState,State).
296
297		% check if all variables, constants setup; also allows concrete_constants if no variables exist
298		state_corresponds_to_fully_setup_b_machine(concrete_constants(_)) :- !, b_or_z_mode,
299		\+ b_machine_has_variables.
300		state_corresponds_to_fully_setup_b_machine(X) :- state_corresponds_to_initialised_b_machine(X).
301
302		state_corresponds_to_fully_setup_b_machine(concrete_constants(Constants),State) :- !, b_or_z_mode,
303		\+ b_machine_has_variables, State=Constants.
304		state_corresponds_to_fully_setup_b_machine(X,State) :- state_corresponds_to_initialised_b_machine(X,State).
305
306		% check if we only have constants, no variable values yet
307		state_corresponds_to_set_up_constants_only(root,State) :- !, animation_mode(b),
308		\+ b_machine_has_constants_or_properties, State=[]. % relevant for test 960
309		state_corresponds_to_set_up_constants_only(concrete_constants(Constants),State) :- !,
310		b_or_z_mode, State=Constants.
311		state_corresponds_to_set_up_constants_only(csp_and_b(_,BState),State) :- !,
312		csp_with_bz_mode,
313		state_corresponds_to_set_up_constants_only(BState,State).
314
315		state_corresponds_to_set_up_constants(const_and_vars(_,_)) :- !. % avoid expansion
316		state_corresponds_to_set_up_constants(csp_and_b(_,BState)) :- !, state_corresponds_to_set_up_constants(BState).
317		state_corresponds_to_set_up_constants(X) :- state_corresponds_to_set_up_constants(X,_).
318
319		state_corresponds_to_set_up_constants(const_and_vars(ConstID,Vars),State) :- !,
320		b_or_z_mode, expand_const_and_vars(ConstID,Vars,State).
321		state_corresponds_to_set_up_constants(expanded_const_and_vars(_ConstID,_Vars,FullStore,_),State) :- !,
322		% generated by prepare_state_for_specfile_trans
323		State=FullStore.
324		state_corresponds_to_set_up_constants(expanded_vars(FullStore,_),State) :- !,
325		% generated by prepare_state_for_specfile_trans
326		State=FullStore.
327		state_corresponds_to_set_up_constants(concrete_constants(Constants),State) :- !,
328		b_or_z_mode, State=Constants.
329		state_corresponds_to_set_up_constants(csp_and_b(_,BState),State) :- !,
330		csp_with_bz_mode,
331		state_corresponds_to_set_up_constants(BState,State).
332		state_corresponds_to_set_up_constants([],State) :- !, State=[],
333		b_or_z_mode.
334		state_corresponds_to_set_up_constants(State,RState) :-
335		b_or_z_mode,
336		(State = root -> \+ b_machine_has_constants_or_properties,RState=[] ; RState=State).
337
338		:- use_module(state_space,[current_expression/2]).
339		current_b_expression(CurBState) :-
340		current_expression(_CurID,CurState),
341		state_corresponds_to_set_up_constants(CurState,CurBState).
342
343
344
345		:- use_module(state_space, [current_state_id/1]).
346		:- use_module(bmachine, [determine_type_of_formula/2]).
347		% get a state sufficient to evaluate a given formula (expression or predicate)
348		% it will give an error is the machine is not sufficiently initialised
349		get_current_state_for_b_formula(TypedExpr,BState) :-
350		current_state_id(CurID),
351		get_state_for_b_formula(CurID,TypedExpr,BState).
352		get_state_for_b_formula(StateID,TypedExpr,BState) :-
353		(formula_class(TypedExpr) -> Type=TypedExpr % user already provided formula class
354		; determine_type_of_formula(TypedExpr,Type)), % TODO: extract used ids and only expand those that are required
355		get_state(Type,StateID,TypedExpr,BState).
356
357		formula_class(requires_nothing).
358		formula_class(requires_constants).
359		formula_class(requires_variables).
360
361		:- use_module(probsrc(state_space),[get_constants_state_for_id/3]).
362		get_state(requires_nothing,_ID,_TE,[]).
363		get_state(requires_constants,StateID,TypedExpr,BState) :-
364		(get_constants_state_for_id(StateID,[allow_variable_list],BState) -> true
365		; ajoin(['Please setup constants first, cannot evaluate (in state ',StateID,') :'],Msg),
366		add_error(get_state,Msg,TypedExpr,TypedExpr),fail).
367		get_state(requires_variables,StateID,TypedExpr,BState) :-
368		my_visited_expression(StateID,State),
369		(state_corresponds_to_initialised_b_machine(State,BState) -> true ;
370		ajoin(['Please initialise machine first, cannot evaluate (in state ',StateID,') :'],Msg),
371		add_error(get_state,Msg,TypedExpr,TypedExpr),fail).
372		% TO DO: we could try and get only those identifiers that are really used
373
374		:- use_module(state_space,[visited_expression/2]).
375		my_visited_expression(root,S) :- !,
376		S=root. % ensure we succeed even if no state space set (e.g. when no machine provided to probcli)
377		my_visited_expression(StateID,State) :- visited_expression(StateID,State).
378
379		/* TRANSITIONS */
380
381		:- use_module(tools_meta,[call_residue/2]).
382		% ---------------------------------------------------
383
384
385		% Tries to find successor state for Op in State DB. Fails, if no solution is possible
386		% Input: State DB, Operation Op
387		% Output: DB2 the sucessor state
388		% Residue: Unfinished co-routines (should not happen!)
389		%specfile_trans(DB,Op,DB2,[]) :- !, specfile:i_transition(DB,Op,DB2).
390		specfile_trans(DB,OpName,Op,DB2,TransInfo,Residue) :-
391		% i_transition(DB,OpName,Op,DB2,TransInfo), Residue = []. % is faster, but no residue checking
392		animation_mode(MODE),
393		call_residue(i_transition(MODE,DB,OpName,Op,DB2,TransInfo),Residue).
394
395		i_transition(b,State,OpName,Op,NewState,TransInfo) :- !,
396		b_trans(State,OpName,Op,NewState,TransInfo).
397		i_transition(xtl,State,OpName,Op,NewState,TransInfo) :- !,
398		xtl_transition(State,Op,NewState,TransInfo), functor(Op,OpName,_).
399		i_transition(cspm,State,_OpName,Op,NewState,[]) :- !,
400		% Note: the OpName is ignored: we cannot make use of it
401		cspm_transition(State,Op,NewState).
402		%i_transition(promela,State,_OpName,Op,NewState,[]) :- !,
403		% promela_transition(State,Op,NewState).
404		% ; MODE=smv -> smv_transition(State,Op,NewState),TransInfo=[]
405		i_transition(csp_and_b,State,OpName,Op,NewState,TransInfo) :- !,
406		% Note: the OpName is either the name of a B operation or '$CSP' (or a variable)
407		csp_and_b_transition(State,OpName,Op,NewState,TransInfo).
408
409
410		% if you call specfile_trans multiple times for the same state, it is
411		% more efficient to call this predicate first once
412		prepare_state_for_specfile_trans(const_and_vars(ConstID,Vars),CurID,R) :- !, %print(expanding_const(ConstID)),nl,
413		R = expanded_const_and_vars(ConstID,Vars,FullStore,Infos),
414		expand_const_and_vars(ConstID,Vars,FullStore), %, print(full(FullStore)),nl.
415		prepare_infos(FullStore,CurID,Infos).
416		prepare_state_for_specfile_trans(FullStore,CurID,R) :- FullStore=[_|_],
417		prepare_infos(FullStore,CurID,Infos), Infos \=[],
418		!,
419		R = expanded_vars(FullStore,Infos).
420		prepare_state_for_specfile_trans(csp_and_b(CSP,BStore),CurID,csp_and_b(CSP,Res)) :- !,
421		prepare_state_for_specfile_trans(BStore,CurID,Res).
422		prepare_state_for_specfile_trans(X,_,X).
423
424		% a version with a memo argument to store expanded constants
425		prepare_state_for_specfile_trans(const_and_vars(ConstID,Vars),CurID,MEMO,R) :- !, %print(expanding_const(ConstID)),nl,
426		R = expanded_const_and_vars(ConstID,Vars,FullStore,Infos),
427		(nonvar(MEMO),MEMO = [ConstID/ConstantsStore]
428		% constants have already been previously extracted; e.g., in model_checker loop
429		-> %tools_printing:print_term_summary(memo(ConstID,ConstantsStore)),nl,
430		append(Vars,ConstantsStore,FullStore) % simply reuse expanded constants in MEMO
431		% used to be constants first, but has to be compatible with b_initialise_machine2 and expand_const_and_vars/3
432		; % expand_const_and_vars/3 inlined (so as to obtain ConstantsStore
433		visited_expression(ConstID,concrete_constants(ConstantsStore)), %% This can take a while if the Constants are big !
434		% print(no_memo(ConstID,MEMO)),tools_printing:print_term_summary(ConstantsStore),nl,
435		append(Vars,ConstantsStore,FullStore),
436		(var(MEMO)
437		-> MEMO=[ConstID/ConstantsStore] % store expanded constants to avoid unpacking again
438		; true)
439		), %, print(full(FullStore)),nl.
440		prepare_infos(FullStore,CurID,Infos).
441		prepare_state_for_specfile_trans(FullStore,CurID,_,R) :- FullStore=[_|_],
442		prepare_infos(FullStore,CurID,Infos), Infos \=[], !,
443		R = expanded_vars(FullStore,Infos).
444		prepare_state_for_specfile_trans(csp_and_b(CSP,BStore),CurID,MEMO,csp_and_b(CSP,Res)) :- !,
445		prepare_state_for_specfile_trans(BStore,CurID,MEMO,Res).
446		prepare_state_for_specfile_trans(X,_,_,X). % TODO: prepare infos as well if we have no constants
447
448		:- use_module(state_packing,[pack_state/2, get_packed_b_state_with_uncompressed_lists/2]).
449		% store some operation independent infos which are useful
450		prepare_infos(FullStore,CurID,Infos) :- CurID \= root,
451		(get_preference(operation_reuse_setting,false)
452		-> Infos = []
453		% TO DO: check if we should enable this: get_preference(use_state_packing,true)
454		% TODO: we could check if there are operations which do not write all variables
455		; Infos=[packed_state/PackedList, state_id/CurID],
456		(CurID \= unknown, state_space:packed_visited_expression(CurID,PS),
457		get_packed_b_state_with_uncompressed_lists(PS,PackedList) % replace '$cst_vars' and compressed lists
458		-> true %,write('+')
459		; format('prepare_infos for state ~w: need to pack_values~n',[CurID]), % should ideally not happen
460		pack_state(FullStore,PS), % precompute state packing; will be re-used multiple times
461		get_packed_b_state_with_uncompressed_lists(PS,PackedList)
462		)
463		).
464
465		% extract pre-computed infos
466		extract_infos_from_prepared_state(expanded_const_and_vars(_,_,_,Infos),Res) :- !, Res=Infos.
467		extract_infos_from_prepared_state(expanded_vars(_,Infos),Res) :- !, Res=Infos.
468		extract_infos_from_prepared_state(_,[]).
469
470		remove_infos_from_prepared_state(expanded_const_and_vars(C,V,_,_),Res) :- !, Res=const_and_vars(C,V).
471		remove_infos_from_prepared_state(expanded_vars(V,_),R) :- !, R=V.
472		remove_infos_from_prepared_state(S,S).
473
474		% extract initialised variables from a state
475		extract_variables_from_state(const_and_vars(_,V),R) :- !,R=V.
476		extract_variables_from_state(expanded_const_and_vars(_,V,_,_),R) :- !,R=V.
477		extract_variables_from_state(expanded_vars(V,_),R) :- !,R=V.
478		extract_variables_from_state([],[]).
479		extract_variables_from_state([H|T],[H|T]).
480
481		:- use_module(probsrc(btypechecker),[prime_atom0/2]). % add $0 at end of variable
482		prime_binding(bind(ID,V),bind(PID,V)) :- prime_atom0(ID,PID).
483
484		extract_variables_from_state_as_primed(SrcState,PrimedVarBindings) :-
485		extract_variables_from_state(SrcState,VarVals),
486		maplist(prime_binding,VarVals,PrimedVarBindings).
487
488
489		/* can be attempted if trans fails to attempt to use partially computed transitions */
490		partial_trans(DB,Op,DB2,Residue) :-
491		call_residue(partial_i_transition(DB,Op,DB2),Residue).
492
493		partial_i_transition(root,'$partial_setup_constants',concrete_constants(ConstantsStore)) :-
494		animation_mode(b),
495		b_interpreter:b_partial_set_up_concrete_constants(ConstantsStore).
496
497		% a predicate which automatically calls partial_trans :
498		specfile_trans_or_partial_trans(DB,OpName,Op,DB2,TransInfo,Residue,Partial) :-
499		if(specfile_trans(DB,OpName,Op,DB2,TransInfo,Residue),Partial=false,
500		(OpName='$setup_constants', % OpName is often an input argument here
501		TransInfo=[], Partial = true,
502		partial_trans(DB,Op,DB2,Residue))).
503
504		/* build up skeletons of possible operations; to be used before time_out call is made */
505		% currently only used in zmq worker.pl
506		specfile_possible_trans_name(State,OpName) :- animation_mode(MODE),
507		(MODE=b -> b_possible_trans_name(State,OpName)
508		; MODE = csp_and_b -> csp_b_possible_trans_name(State,OpName)
509		; setup_transition_skeleton(MODE,OpName) /* TO DO: add more possible skeletons */
510		).
511
512		% only set up skeletons if it is worth it for computing all successors
513		% e.g., currently it is not worth it to setup skeletons for either CSP or CSP||B (due to renaming,... we cannot predict which parts of a CSP process can be excluded)
514		specfile_possible_trans_name_for_successors(State,OpName) :- animation_mode(MODE),
515		(MODE=b
516		-> b_possible_trans_name(State,OpName)
517		; setup_transition_skeleton(MODE,OpName)
518		).
519
520		setup_transition_skeleton(_,_). /* TO DO: add more possible skeletons ? */
521
522		:- use_module(library(random)).
523		b_possible_trans_name(root,OpName) :- !,
524		(b_machine_has_constants_or_properties
525		-> OpName = '$setup_constants'
526		; OpName = '$initialise_machine').
527		b_possible_trans_name(concrete_constants(_),OpName) :- !, OpName = '$initialise_machine'.
528		b_possible_trans_name(_State,OpName) :-
529		(preferences:preference(randomise_operation_order,true),random(1,3,1)
530		-> b_machine_operation_names_in_reverse_order(OpName) ; true),
531		%b_get_machine_operation(OpName,_Res,_Params,_,_,_).
532		b_top_level_feasible_operation(OpName). % TO DO: we could link also with cbc feasibility analysis if carried out
533		% we could check: b_operation_cannot_modify_state(OpName) given a preference, in particular for SAFETY_MODEL_CHECK when operation already covered
534
535		csp_b_possible_trans_name(csp_and_b_root,OpName) :- !,
536		(b_machine_has_constants_or_properties
537		-> OpName = tau % tau('$setup_constants')
538		; OpName = tau % tau('$initialise_machine')
539		).
540		csp_b_possible_trans_name(concrete_constants(_),OpName) :- !,
541		OpName = tau. % tau('$initialise_machine')
542		csp_b_possible_trans_name(State,OpName) :-
543		b_possible_trans_name(State,OpName).
544		% TO DO: add non-synchronised channels
545
546		% --------------
547
548		:- use_module(probcspsrc(haskell_csp),[channel_type_list/2, symbol/4]).
549		:- use_module(debug).
550		% check whether a currently open CSP is type compatible with a loaded B machine
551		type_check_csp_and_b :- animation_mode(csp_and_b), debug_println(9,type_check_csp_and_b),
552		b_get_machine_operation(ChannelOpName,Res,Params,_,_,_), append(Params,Res,ParamsRes),
553		channel_type_list(ChannelOpName,CSPTypeList),
554		% TO DO: also check B variable names which match channel name
555		debug_println(9,checking_synchronised_channel(ChannelOpName,ParamsRes,CSPTypeList)),
556		l_check_compatibility(ParamsRes,CSPTypeList,ChannelOpName),
557		fail.
558		type_check_csp_and_b.
559
560		%convert_csp_type_to_list(type(T),R) :- convert_csp_type_to_list2(T,R).
561		%convert_csp_type_to_list2(dotUnitType,[]).
562		%convert_csp_type_to_list2(dotTupleType(T),T).
563
564		l_check_compatibility([],[],_) :- !.
565		l_check_compatibility([B|BT],[CSP|CSPT],ChannelOpName) :- !, check_compatibility(B,CSP,ChannelOpName),
566		l_check_compatibility(BT,CSPT,ChannelOpName).
567		l_check_compatibility([],CSP,ChannelOpName) :- !,
568		add_error(type_check_csp_and_b,'CSP Channel has too many parameters: ', ChannelOpName:CSP).
569		l_check_compatibility(B,[],ChannelOpName) :- !,
570		print('* CSP Channel has too few parameters: '), print(ChannelOpName),nl,
571		print('* B Arguments will be ignored: '), l_print_bexpr_or_subst(B),nl.
572		%add_error(type_check_csp_and_b,'CSP Channel has too few parameters: ', ChannelOpName:B).
573
574		check_compatibility(b(identifier(ID),TYPE,INFO),CSP_TYPE,ChannelOpName) :- !,
575		(type_ok(TYPE,CSP_TYPE) -> true ;
576		% TO DO: pretty print B and CSP Types
577		add_error(type_check_csp_and_b,'Incompatible types between B and CSP: ',ChannelOpName:ID:(TYPE:CSP_TYPE),b(identifier(ID),TYPE,INFO))
578		).
579		check_compatibility(B,CSP,ChannelOpName) :- !,
580		add_internal_error('Illegal types: ',check_compatibility(B,CSP,ChannelOpName)).
581
582		% TO DO: needs to be refined much more;
583		type_ok(Type,CSPType) :-
584		(type_ok2(Type,CSPType) -> true
585		; add_error(type_check_csp_and_b,'Cannot be converted (B:CSP): ',Type:CSPType),fail).
586		type_ok2(boolean,X) :- !, is_csp_boolean_type(X).
587		type_ok2(integer,X) :- !, is_csp_integer_type(X).
588		type_ok2(string,CSP) :- !,is_csp_global_set_type(CSP,string).
589		type_ok2(set(T),CSP) :- !, is_csp_set_type(CSP,T).
590		% TO DO: what if we have set(couple(integer,T)) instead of seq(T) ?
591		% rye
592		% check set(couple(integer,T)) (seq type) in B
593		type_ok2(seq(T),CSP) :- !, is_csp_seq_type(CSP,T).
594		type_ok2(couple(A,B),CSP) :- !, is_csp_couple_type(CSP,A,B).
595		type_ok2(global(GS),CSP) :- !,is_csp_global_set_type(CSP,GS).
596		type_ok2(X,Y) :- print(unknown(X,Y)),nl.
597
598		is_csp_couple_type(setValue([na_tuple([A|Rest])|_]),TA,TB) :- type_ok(TA,setValue([A])),
599		check_rest_couple_els(Rest,TB).
600		is_csp_couple_type(typeTuple([A|Rest]),TA,TB) :- type_ok(TA,A), check_rest_couple(Rest,TB).
601
602		check_rest_couple_els([B],TB) :- !, type_ok(TB,setValue([B])).
603		check_rest_couple_els([B1|BRest],couple(TB1,TBRest)) :- type_ok(TB1,setValue([B1])),
604		check_rest_couple_els(BRest,TBRest).
605		check_rest_couple([B],TB) :- !, type_ok(TB,B).
606		check_rest_couple([B1|BRest],couple(TB1,TBRest)) :- type_ok(TB1,B1),
607		check_rest_couple(BRest,TBRest).
608
609		% rye
610		% check if it is couple(integer, T) type and return T in 2nd arguments
611		couple_int(couple(integer, T), T). % possible sequence
612
613		% rye: it's not correct to check only Head
614		% % for example, for CSP type, {{}, {(1,2),(2,3)}}. Its head is emptyset, but the second one is set of tuple
615		is_csp_set_type('Set'([H|_]),Type) :- type_ok(Type,H). % just check Head
616		% check the 2nd element in set in case the 1st is emptyset
617		is_csp_set_type(setValue([_|T]),Type) :-
618		T = [H1 | _], !,
619		% if it is set(couple(integer, T)), it can be a sequence type
620		(couple_int(Type, TH1) -> is_csp_seq_type(setValue(T), TH1)
621		; type_ok(Type,H1)
622		). % check the 2nd
623		% if it is only one element in set, just check the head
624		is_csp_set_type(setValue([H|T]),Type) :-
625		(couple_int(Type, TH1) -> is_csp_seq_type(setValue([H|T]), TH1)
626		; type_ok(Type,H)
627		). % just check Head
628
629		is_csp_seq_type('Seq'(H),Type) :- type_ok(Type,H).
630		is_csp_seq_type(setValue([H|_]),Type) :- H=list(L), is_csp_list(L,Type).
631		is_csp_list([],_).
632		is_csp_list([H|_],Type) :- type_ok(Type,setValue([H])).
633
634		is_csp_boolean_type(boolType).
635		is_csp_boolean_type(setValue([H|_])) :- is_csp_boolean_value(H).
636		is_csp_boolean_value(true).
637		is_csp_boolean_value(false).
638
639		is_csp_integer_type(intType).
640		is_csp_integer_type(setFromTo(_,_)).
641		is_csp_integer_type(setFrom(_)).
642		is_csp_integer_type(setValue([int(_)|_])).
643
644		is_csp_global_set_type(dataType(_),_GS). % TO DO CHECK MEMBERS
645		is_csp_global_set_type(setValue([]),_GS). % TO DO CHECK MEMBERS
646		is_csp_global_set_type(setValue([_|_]),_GS). % TO DO CHECK MEMBERS
647
648		% --------------
649
650
651		:- use_module(bmachine,[b_get_machine_operation/4]).
652		:- use_module(bsets_clp,[tuple_of/3]).
653		% compute transitions for a CSP || B specification
654		% Note: the OpName is either the name of a B machine operation (even if hidden) or '$CSP' (useful for ltsmin)
655		csp_and_b_transition(root,OpName,Op,NewState,TransInfo) :- !,
656		Op = start_cspm_MAIN, OpName=Op, NewState = csp_and_b_root,TransInfo = [].
657		csp_and_b_transition(csp_and_b_root,OpName,Trans,NewState,TransInfo) :- !,
658		Trans = tau(Op), OpName = '$CSP',
659		b_trans(root,_,Op,InitialBState,TransInfo),
660		(InitialBState = concrete_constants(_)
661		-> NewState = InitialBState
662		; csp_initialisation_for_b(InitialCSPState),
663		NewState = csp_and_b(InitialCSPState,InitialBState)
664		).
665		csp_and_b_transition(concrete_constants(C),OpName,Trans,NewState,TransInfo) :- !,
666		Trans = tau(Op), OpName = '$CSP',
667		b_trans(concrete_constants(C),_,Op,InitialBState,TransInfo),
668		csp_initialisation_for_b(InitialCSPState),
669		NewState = csp_and_b(InitialCSPState,InitialBState).
670		csp_and_b_transition(csp_and_b(CSPState,BState),OpName,EventVisibleToUser,csp_and_b(NewCSP,NewB),TransInfo) :-
671		!,
672		csp_transition_for_b(CSPState,ChOpName,ChArgs,CSPAction,NewCSP),
673		% TO DO: split up csp_transition_for_b: into two parts; second part converts datatypes and only called if linking op exists
674		%% print(csp_trans(ChOpName,ChArgs)),nl, %%
675		length(ChArgs,Len), length(OpArgs,Len),
676		b_transition_for_csp(ChOpName,CSPAction,ChArgs,OpArgs,BState,OpName,Operation,NewB,TransInfo),
677		hide_csp_event(CSPAction,Operation,EventVisibleToUser).
678		csp_and_b_transition(State,'$CSP',Op,NewState,[]) :-
679		% we have a pure CSP state: use CSP-M transition
680		cspm_transition(State,Op,NewState).
681
682		:- use_module(bmachine,[b_is_variable/1,b_is_constant/1]).
683		% compute the B counterpart for a CSP transition:
684		b_transition_for_csp(ChOpName,_CSPAction,ChArgs,OpArgs,BState,OpName,Operation,NewB,TransInfo) :-
685		build_up_b_operation_for_csp(ChOpName,OpArgs,Operation),
686		!,
687		OpName = ChOpName,
688		%% print_message(trying_b_trans(Operation,ChArgs,OpArgs)), %%
689		(get_preference(operation_reuse_setting,false)
690		-> generate_b_operationargs_from_csp(ChArgs,OpArgs),
691		b_trans(BState,OpName,Operation,NewB,TransInfo)
692		;
693		% compute B transition without parameters so that we can cache
694		b_trans(BState,OpName,Operation,NewB,TransInfo),
695		% and unify afterwards
696		generate_b_operationargs_from_csp(ChArgs,OpArgs)
697		).
698		%%, print_message(csp_btrans(Operation)), %%.
699		b_transition_for_csp(ChOpName,_CSPAction,ChArgs,OpArgs,BState,OpName,Operation,NewB,TransInfo) :-
700		OpName = ChOpName,
701		(b_is_variable(ChOpName) ; b_is_constant(ChOpName)),
702		%% print(probing(ChOpName)),nl,
703		expand_const_and_vars_to_full_store(BState,FBState),
704		try_lookup_value_in_store_and_global_sets(ChOpName,FBState,IdValue),
705		!,
706		remove_infos_from_prepared_state(BState,NewB),
707		TransInfo=[],
708		/* interpret as probing operation: get value of var,cst,SET */
709		generate_b_operationargs_from_csp(ChArgs,OpArgs),
710		(OpArgs=[SingleVal]
711		-> SingleVal = IdValue, Operation='-->'(ChOpName,[IdValue])
712		; OpArgs=[Val1,Val2],
713		tuple_of(Val1,Val2,IdValue), /* from bsets_clp, use exact_element_of ??? */
714		OpCall =.. [ChOpName,Val1],
715		Operation='-->'(OpCall,[Val2])
716		).
717		b_transition_for_csp(_ChOpName,CSPAction,_ChArgs,_OpArgs,BState,OpName,Operation,NewB,TransInfo) :-
718		OpName = '$CSP', % all CSP events grouped together
719		remove_infos_from_prepared_state(BState,NewB),
720		TransInfo=[],
721		/* no B operation of the name; could be tau or tick or extra comm channel */
722		%Op1 =.. [ChOpName|OpArgs],
723		Operation = CSPAction. % removed csp(.) wrapper [for LTL model checker]
724
725		hide_csp_event(CSPAction,_,EventVisibleToUser) :-
726		symbol('HIDE_CSPB',_,Span,_),!, % if there is a HIDE_CSPB definition then we do MAIN [{| HIDE_CSPB |}] B_MACHINE \ {| HIDE_CSPB |}
727		haskell_csp:evaluate_argument(val_of('HIDE_CSPB',Span),EvCList),
728		% print(hide(EvCList,CSPAction)),nl,
729		haskell_csp:expand_channel_pattern_expression(EvCList,ECList,no_loc_info_available),
730		haskell_csp:cspm_hide_action(CSPAction,omega,ECList, Span, EventVisibleToUser,_).
731		hide_csp_event(_CSPAction,Operation,EventVisibleToUser) :-
732		% get_preference(csp_event_visible_to_user,true) -> EventVisibleToUser = CSPAction
733		EventVisibleToUser = Operation.
734
735		build_up_b_operation_for_csp(OpName,OpArgs,Operation) :- %print(csp(OpName,OpArgs,Operation)),nl,
736		nonvar(OpName),
737		b_get_machine_operation(OpName,Res,Params,_), %print(get_machine_op(OpName,Res,Params)),nl,
738		specfile:generate_args(OpArgs,Params,Res, BArgs,BResults,OpName), %print(gen_args(BArgs,BResults)),nl,
739		% 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
740		safe_univ(Op1,[OpName|BArgs]), %print(op1(Op1)),nl,
741		(BResults = [] -> Operation = Op1 ; Operation = '-->'(Op1,BResults)).
742
743		:- use_module(bmachine,[b_get_machine_operation_for_animation/6]).
744		build_up_b_real_operation(OpName,Operation) :-
745		b_get_machine_operation_for_animation(OpName,Res,Params,_,_,true), %true==TopLevel
746		length(Params,Len), length(OpArgs,Len),
747		length(Res,RLen), length(BResults,RLen),
748		safe_univ(Op1,[OpName|OpArgs]),
749		(BResults = [] -> Operation = Op1 ; Operation = '-->'(Op1,BResults)).
750
751		generate_args([],[],Res,[],BRes,_) :- length(Res,L), length(BRes,L).
752		generate_args([],[_Param|T],Res,[_|TA],BRes,OpName) :-
753		generate_args([],T,Res,TA,BRes,OpName).
754		generate_args([CSPArg|TC],[Param|T],Res,[CSPArg|TA],BRes,OpName) :- check_type_for_id(CSPArg,Param,OpName),
755		generate_args(TC,T,Res,TA,BRes,OpName).
756		generate_args([CSPArg|TC],[],[ReturnParam|TRes],[],[CSPArg|TBRes],OpName) :-
757		check_type_for_id(CSPArg,ReturnParam,OpName),
758		generate_args(TC,[],TRes,[],TBRes,OpName).
759		generate_args([H|T],[],[],[],[],OpName) :-
760		add_error(specfile,'CSP provides extra arguments: ',OpName:[H|T]).
761
762		check_type_for_id(Val,TID,OpName) :- get_texpr_type(TID,Type),
763		check_type(Type,Val,OpName:TID).
764
765		:- block check_type(?,-,?).
766		check_type(boolean,pred_true,_) :- !.
767		check_type(boolean,pred_false,_) :- !.
768		check_type(integer,int(_),_) :- !.
769		check_type(string,string(_),_) :- !.
770		check_type(global(GS),fd(_,GS),_) :- !.
771		check_type(couple(A,B),(VA,VB),OID) :- !, check_type(A,VA,OID), check_type(B,VB,OID).
772		check_type(set(_T),[],_) :- !.
773		check_type(set(_T),closure(_,_,_),_) :- !. % TO DO: check type signature of closure
774		check_type(set(T),[H|_],OID) :- !, check_type(T,H,OID).
775		check_type(set(T),avl_set((node(Y,_,_,_L,_R))),OID) :- !, check_type(T,Y,OID).
776		check_type(seq(T),V,OID) :- !, check_type(set(couple(integer,T)),V,OID).
777		% TO DO: record, freetype ; but do not appear in translation from CSP to B yet
778		check_type(Type,Value,OpName:TID) :-
779		def_get_texpr_id(TID,ID),
780		add_error(check_type_for_id,'Illegal CSP value for argument: ',OpName:ID:type(Type):value(Value)),
781		fail.
782
783		get_operation_internal_name(Op,Name) :- var(Op),!,
784		add_error(get_operation_internal_name,'Variable Transition: ',Op), Name=Op.
785		get_operation_internal_name('$initialise_machine',N) :- !, N='$initialise_machine'.
786		get_operation_internal_name('$setup_constants',N) :- !, N='$setup_constants'.
787		get_operation_internal_name('$partial_setup_constants',N) :- !, N='$partial_setup_constants'.
788		get_operation_internal_name(Op,Name) :- get_operation_name(Op,Name).
789
790		is_setup_constants_internal_name('$setup_constants').
791		is_setup_constants_internal_name('$partial_setup_constants').
792
793		% tool to get the basic operation/channel/event name of a transition:
794		get_operation_name(Op,Name) :- var(Op),!, add_error(get_operation_name,'Variable Transition: ',Op), Name=Op.
795		get_operation_name('-->'(F,_),N) :- !, functor(F,N,_).
796		%get_operation_name(io([Action|_],proc(_Nr,_PROC),_SPAN),F) :-
797		% animation_mode(promela),!,functor(Action,F,_).
798		get_operation_name(io(_V,Ch,_SPAN),N) :- csp_mode,!, functor(Ch,N,_).
799		get_operation_name(FullOperation,Name) :- functor(FullOperation,Functor,_),
800		translate_operation_name(Functor,Name).
801
802		get_operation_arguments(Op,Args) :- var(Op),!, add_error(get_operation_arguments,'Variable Transition: ',Op), Args=[].
803		get_operation_arguments('-->'(F,_ReturnValues),Args) :- !, F =.. [_|Args].
804		%get_operation_arguments(io([_Action|V],proc(_Nr,_PROC),_SPAN),Args) :-
805		% animation_mode(promela),!,Args=V.
806		get_operation_arguments(io(V,_Ch,_SPAN),Args) :- csp_mode,!, Args = V.
807		get_operation_arguments(FullOperation,Args) :- FullOperation =.. [_|Args].
808
809		get_operation_return_values_and_arguments('-->'(F,ReturnValues),ReturnValues,Args) :- !,
810		F =.. [_|Args].
811		get_operation_return_values_and_arguments(Op,[],Args) :- get_operation_arguments(Op,Args).
812
813		translate_operation_name(Var,T) :- var(Var),!,T='_?Operation?_'.
814		translate_operation_name('$initialise_machine',T) :- !,T='INITIALISATION'.
815		translate_operation_name('$setup_constants',T) :- !,T='SETUP_CONSTANTS'.
816		translate_operation_name('$partial_setup_constants',T) :- !,T='PARTIAL_SETUP_CONSTANTS'.
817		%translate_operation_name(InternalName,Res) :- !, Res=InternalName.
818		translate_operation_name(X,X).
819
820		:- use_module(bmachine,[b_get_operation_description/2]).
821		% get a textual description of a transition, based on description pragma
822		get_operation_description(OpTerm,Desc) :- b_or_z_mode,
823		get_operation_name(OpTerm,OpName),
824		b_get_operation_description(OpName,Desc).
825		% in future we could possible use operation parameter values to adapt description
826
827		:- use_module(state_space,[transition/4,transition_info/2]).
828		get_operation_description_for_transition_id(StateId,TransitionId,Desc) :-
829		transition(StateId,OpTerm,TransitionId,NextId), !,
830		(xtl_mode % TODO: allow other modes?
831		-> transition_info(TransitionId,description(Desc))
832		; get_operation_description_for_transition(StateId,OpTerm,NextId,Desc)
833		).
834		get_operation_description_for_transition_id(StateId,TransitionId,_) :-
835		format('No transition from state ~w with id ~w!~n', [StateId,TransitionId]),
836		fail.
837
838		:- use_module(probsrc(b_interpreter),[b_compute_explicit_epression_no_wf/6]).
839		:- use_module(probsrc(bmachine),[get_operation_description_template_expr/2]).
840		% get a description for operation from a given state; to do: we could provide destination state
841		get_operation_description_for_transition(StateId,OpTerm,NextId,Desc) :- xtl_mode, !,
842		transition(StateId,OpTerm,TransitionId,NextId),
843		transition_info(TransitionId,description(Desc)).
844		get_operation_description_for_transition(StateId,OpTerm,NextId,Desc) :- b_or_z_mode,
845		get_operation_internal_name(OpTerm,OpName),
846		get_operation_description_template_expr(OpName,TemplateStringExpr),
847		visited_expression(NextId,State),
848		state_for_op(OpName,State,BState1),
849		visited_expression(StateId,BeforeState),
850		( no_before_state(OpName) -> BState=BState1
851		; state_for_op(OpName,BeforeState,BState0)
852		-> extract_variables_from_state_as_primed(BState0,PrimedBefore),
853		append(PrimedBefore,BState1,BState)
854		; add_warning(specfile,'Could not get initialised before state for: ',StateId),
855		BState = BState1
856		),
857		% TODO: use NextId and add StateId as $0 vars
858		% maplist(create_primed_binding,InVariablesState,PrimedVars),
859		% append(PrimedVars,Out,PredState),
860		!,
861		get_local_state_for_operation_transition(OpName,OpTerm,LocalState),
862		%write(local_state(OpName,OpTerm,LocalState)),nl,
863		% TODO: process errors better
864		if(b_compute_explicit_epression_no_wf(TemplateStringExpr,LocalState,BState,string(SD),
865		operation_description(OpName),0),
866		Desc=SD,
867		(get_operation_description(OpTerm,D), ajoin(['Error evaluating template: ',D],Desc))
868		).
869		get_operation_description_for_transition(_StateId,OpTerm,_NextStateId,Desc) :-
870		get_operation_description(OpTerm,Desc).
871
872		state_for_op('$setup_constants',State,BState) :- !,
873		state_corresponds_to_set_up_constants(State,BState).
874		state_for_op(_,State,BState) :-
875		state_corresponds_to_initialised_b_machine(State,BState).
876
877		no_before_state('$setup_constants').
878		no_before_state('$initialise_machine').
879
880		get_local_state_for_operation_transition(OpName,OperationTerm,LocalState) :-
881		get_local_states_for_operation_transition(OpName,OperationTerm,ParaStore,ResultStore),
882		append(ResultStore,ParaStore,LocalState).
883
884		% get local states for parameter values and result values extracted from a B operation transition term
885		get_local_states_for_operation_transition(OpName,OperationTerm,ParaStore,ResultStore) :- b_or_z_mode,!,
886		get_operation_return_values_and_arguments(OperationTerm,ReturnValues,ParaValues),
887		(b_get_machine_operation_for_animation(OpName,Results,Parameters,_Body,_OType,_TopLevel,OpPos)
888		-> true
889		; is_setup_constants_internal_name(OpName) -> Results=[], Parameters=[], OpPos=unknown
890		; add_error(specfile,'Unrecognized operation: ',OpName),
891		Results=[], Parameters=[], OpPos=unknown
892		),
893		def_get_texpr_ids(Parameters,OpParameterNames), % also includes virtual parameters (show_eventb_any_arguments)
894		(ParaValues=[]
895		-> ParaStore=[]
896		; (OpParameterNames=[], ParaValues=[_|_]
897		-> (get_preference(show_eventb_any_arguments,true)
898		-> add_message(specfile,'Ignoring additional parameters for:',OpName,OpPos)
899		; add_warning(specfile,'Ignoring additional parameters for:',OpName,OpPos)
900		),
901		ParaStore = []
902		; create_local_store_for_operation(OpParameterNames,ParaValues,OpName,ParaStore)
903		)
904		),
905		(ReturnValues=[]
906		-> ResultStore = []
907		; %b_get_machine_operation_result_names(OpName,OpResults),
908		def_get_texpr_ids(Results,OpResults),
909		create_local_store_for_operation(OpResults,ReturnValues,OpName,ResultStore)
910		).
911		get_local_states_for_operation_transition(OpName,OperationTerm,ParaStore,ResultStore) :- xtl_mode,
912		xtl_transition_parameters(OpName,ParaNames), !, % user-defined parameters found, otherwise use default params below
913		get_operation_return_values_and_arguments(OperationTerm,_ReturnValues,ParaValues), % ReturnValues should always be []
914		ResultStore = [],
915		maplist(gen_id_bind,ParaNames,ParaValues,ParaStore).
916		get_local_states_for_operation_transition(_OpName,OperationTerm,ParaStore,ResultStore) :- % not B mode or no user-defined params available in XTL mode
917		ResultStore = [],
918		get_operation_return_values_and_arguments(OperationTerm,ReturnValues,ParaValues),
919		ReturnValues = [], % should always succeed
920		gen_para_bind(ParaValues,1,ParaStore). % create [bind(para1,Val1),...]
921
922		gen_id_bind(ID,Val,bind(ID,Val)).
923
924		gen_para_bind([],_,[]).
925		gen_para_bind([H|T],Nr,[bind(ParaNr,H)|BT]) :- ajoin([para,Nr],ParaNr),
926		N1 is Nr+1,
927		gen_para_bind(T,N1,BT).
928
929		% create a store from parameter names and values:
930		create_local_store_for_operation([],[],_,Store) :- !, Store=[].
931		create_local_store_for_operation([Name|NT],[Val|VT],OpName,[bind(Name,Val)|StoreT]) :- !,
932		create_local_store_for_operation(NT,VT,OpName,StoreT).
933		create_local_store_for_operation([Name|NT],[],OpName,Store) :- !,
934		ajoin(['Missing values for operation ',OpName,':'],Msg),
935		add_error(specfile,Msg,[Name|NT]),
936		Store = [].
937		create_local_store_for_operation(_,V,OpName,Store) :-
938		ajoin(['Too many values for operation ',OpName,':'],Msg),
939		add_error(specfile,Msg,V),
940		Store = [].
941
942		:- use_module(library(between),[between/3]).
943
944		b_trans(State,OpName,Operation,NewState,PathInfo) :-
945		compute_operation_effect_max(State,OpName,Operation,NewState,PathInfo,_Max).
946
947		:- use_module(store,[store_updates_and_normalise/3]).
948
949		compute_operation_effect_max([],OpName,Operation,NewState,PathInfo,Max) :-
950		compute_operation_updates_on_expanded_store([],OpName,Operation,Updates,PathInfo,Max),
951		store_updates_and_normalise(Updates,[],NewState).
952		compute_operation_effect_max([H|T],OpName,Operation,NewState,PathInfo,Max) :-
953		compute_operation_updates_on_expanded_store([H|T],OpName,Operation,Updates,PathInfo,Max),
954		store_updates_and_normalise(Updates,[H|T],NewState).
955		compute_operation_effect_max(const_and_vars(ConstID,Vars),OpName,Operation,ResultingStore,PathInfo,Max) :-
956		prepare_state_for_specfile_trans(const_and_vars(ConstID,Vars),unknown,R),
957		%print(expanded_const_and_vars(ConstID)),nl,
958		compute_operation_effect_max(R,OpName,Operation,ResultingStore,PathInfo,Max).
959		compute_operation_effect_max(expanded_const_and_vars(ID,Vars,FullStore,Infos),OpName,Operation,NewState,PathInfo,Max) :-
960		compute_operation_updates_on_expanded_store(expanded_const_and_vars(ID,Vars,FullStore,Infos),
961		OpName,Operation,Updates,PathInfo,Max),
962		NewState = const_and_vars(ID,NewVars),
963		store_updates_and_normalise(Updates,Vars,NewVars).
964		compute_operation_effect_max(expanded_vars(FullStore,Infos),OpName,Operation,NewState,PathInfo,Max) :-
965		compute_operation_updates_on_expanded_store(expanded_vars(FullStore,Infos),
966		OpName,Operation,Updates,PathInfo,Max),
967		store_updates_and_normalise(Updates,FullStore,NewState).
968
969		compute_operation_effect_max(concrete_constants(ConstantsStore),'$initialise_machine',OpInit,ResultingStore,PathInfo,Max) :-
970		get_max_enablings_for_init(Max,'$initialise_machine',MaxForCall),
971		succeed_max_call_id('$initialise_machine',
972		b_interpreter:b_initialise_machine(ConstantsStore,InitialVars,InitialStore,PathInfo),MaxForCall),
973		create_initialisation_operation(InitialVars,OpInit),
974		(\+ preferences:preference(symmetry_mode,flood), /* TO DO : improve permutation to allow using const_and_vars optimisation */
975		visited_expression(ConstID,concrete_constants(ConstantsStore))
976		-> ResultingStore = const_and_vars(ConstID,InitialVars) /* avoid storing constant values again */
977		; ResultingStore = InitialStore).
978		compute_operation_effect_max(root,'$setup_constants',OpSetup,concrete_constants(FilteredConstantsStore),[],Max) :-
979		b_machine_has_constants_or_properties,
980		get_max_enablings_for_init(Max,'$setup_constants',MaxForCall),
981		compute_constants(ConstantsStore,MaxForCall,Complete),
982		create_setup_constants_operation(ConstantsStore,Complete,OpSetup),
983		%%print_message('FOUND_CONSTANTS'(OpName)),
984		(get_preference(filter_unused_constants,true) % possibly disable if VisB or Custom Graph Definitions exist
985		-> exclude(unused_binding,ConstantsStore,FilteredConstantsStore)
986		; FilteredConstantsStore=ConstantsStore).
987		compute_operation_effect_max(root,'$initialise_machine',OpInit,InitialStore,PathInfo,Max) :-
988		\+ b_machine_has_constants_or_properties,
989		get_max_enablings_for_init(Max,'$initialise_machine',MaxForCall),
990		empty_state(EmptyState),
991		succeed_max_call_id('$initialise_machine',
992		b_interpreter:b_initialise_machine(EmptyState,InitialVars,InitialStore,PathInfo),MaxForCall),
993		create_initialisation_operation(InitialVars,OpInit).
994
995
996		unused_binding(bind(C,_)) :- bmachine:b_is_unused_constant(C).
997
998		compute_constants(ConstantsStore,_Max,C) :-
999		% check if values have been computed and stored into a file before -- if yes, use them
1000		load_constants(Stores,MaxReached),!,
1001		C = complete_properties, % TODO: check that only complete properties stored or that we store this info
1002		choose_loaded_solution(Stores,ConstantsStore,MaxReached).
1003		compute_constants(ConstantsStore,Max,Complete) :-
1004		% print('Searching for valid CONSTANTS'),nl,!,
1005		succeed_max_call_id('$setup_constants',b_interpreter:b_set_up_concrete_constants(ConstantsStore,Complete),Max).
1006
1007		choose_loaded_solution(Stores,ConstantsStore,_MaxReached) :-
1008		member(ConstantsStore,Stores).
1009		choose_loaded_solution(_Stores,_ConstantsStore,true) :-
1010		% provoke the setting of the "maximum reached flag"
1011		succeed_max_call_id('$setup_constants',member(_,_),1),fail.
1012
1013		expand_const_and_vars_to_full_store(root,R) :- !,R=[].
1014		expand_const_and_vars_to_full_store(concrete_constants(ConstantsStore),FullStore) :- !,
1015		ConstantsStore = FullStore.
1016		expand_const_and_vars_to_full_store(const_and_vars(ConstID,Vars),FullStore) :- !,
1017		expand_const_and_vars(ConstID,Vars,FullStore).
1018		expand_const_and_vars_to_full_store(expanded_const_and_vars(_ConstID,_Vars,ExpStore,_),FullStore) :- !,
1019		FullStore = ExpStore.
1020		expand_const_and_vars_to_full_store(expanded_vars(ExpStore,_),FullStore) :- !,
1021		FullStore = ExpStore.
1022		expand_const_and_vars_to_full_store(csp_and_b(_,BState),FullStore) :- !,
1023		expand_const_and_vars_to_full_store(BState,FullStore).
1024		expand_const_and_vars_to_full_store(R,R).
1025
1026		expand_const_and_vars(ConstID,Vars,FullStore) :-
1027		visited_expression(ConstID,concrete_constants(ConstantsStore)),
1028		%% This can take a while if the Constants are big !
1029		% print('exp: '),tools_printing:print_term_summary(ConstantsStore),nl,
1030		append(Vars,ConstantsStore,FullStore). % used to be Constants first, now consistent with b_initialise_machine2,
1031		% b_initialise_machine2 puts constants at end to make sharing of complete tail-list easier for successor states
1032
1033		expand_to_constants_and_variables(root,[],[]).
1034		expand_to_constants_and_variables(concrete_constants(ConstStore),ConstStore,[]).
1035		expand_to_constants_and_variables(const_and_vars(ConstID,VarStore),ConstStore,VarStore) :-
1036		visited_expression(ConstID,concrete_constants(ConstStore)).
1037		expand_to_constants_and_variables([],[],[]).
1038		expand_to_constants_and_variables([H|T],[],[H|T]).
1039		expand_to_constants_and_variables(csp_and_b(_,BState),ConstStore,VarStore) :-
1040		expand_to_constants_and_variables(BState,ConstStore,VarStore).
1041
1042		:- use_module(extrasrc(b_operation_cache),[compute_operation_on_expanded_store_cache/6]).
1043
1044		% compute operation effect on a store where all constants have been put into the environment
1045		compute_operation_updates_on_expanded_store(InState,OpName,Operation,NewState,PathInfo,Max) :-
1046		get_preference(operation_reuse_setting,V), V \= false,
1047		b_or_z_mode, % now works with CSP || B
1048		%\+ animation_minor_mode(eventb), % projection used to confuse Event-B interpreter, see test 2138
1049		!,
1050		get_max_enablings_per_operation(Max,OpName,maxNrOfEnablingsPerOperation,MaxForCall),
1051		compute_operation_on_expanded_store_cache(OpName,Operation,InState,NewState,PathInfo,MaxForCall).
1052		compute_operation_updates_on_expanded_store(Store,OpName,Operation,Updates,PathInfo,Max) :-
1053		extract_full_store(Store,FullStore),!,
1054		compute_operation_on_expanded_store2(FullStore,OpName,Operation,Updates,PathInfo,Max).
1055		compute_operation_updates_on_expanded_store(InState,OpName,Operation,Updates,PathInfo,Max) :-
1056		compute_operation_on_expanded_store2(InState,OpName,Operation,Updates,PathInfo,Max).
1057
1058		compute_operation_on_expanded_store2(InState,OpName,Operation,Updates,PathInfo,Max) :-
1059		get_max_enablings_per_operation(Max,OpName,maxNrOfEnablingsPerOperation,MaxForCall),
1060		succeed_max_call_id(OpName,
1061		b_interpreter:b_execute_top_level_operation_update(OpName,Operation,InState,Updates,PathInfo),
1062		MaxForCall).
1063
1064		extract_full_store(expanded_const_and_vars(_,_,FS,_),Res) :- !, Res=FS.
1065		extract_full_store(expanded_vars(FS,_),Res) :- !, Res=FS.
1066
1067		create_initialisation_operation(_InitialVars,'$initialise_machine').
1068
1069		create_setup_constants_operation(_ConstantVars,complete_properties,R) :- !, R='$setup_constants'.
1070		create_setup_constants_operation(_ConstantVars,_,'$partial_setup_constants').
1071
1072		:- use_module(bmachine,[b_get_machine_operation_max/2]). % MAX_OPERATIONS_... DEFINITIONS
1073		get_max_enablings_per_operation_aux(OpName,RMax,_,RandomisedRestart) :-
1074		% TODO: decompose prefixed operation names with . write(get_mach_op_max(OpName)),nl,
1075		b_get_machine_operation_max(OpName,Max),
1076		!,
1077		(Max<0 -> RMax is -Max, RandomisedRestart=true ; RMax=Max, RandomisedRestart=false).
1078		get_max_enablings_per_operation_aux(_OpName,Max,DefaultPref,false) :-
1079		preferences:preference(DefaultPref,Max).
1080
1081		max_operations_zero_for_operation(OpName) :-
1082		b_or_z_mode,
1083		b_top_level_operation(OpName),
1084		(b_get_machine_operation_max(OpName,0) -> true
1085		; get_preference(maxNrOfEnablingsPerOperation,0)).
1086
1087		max_operations_zero_for_setup_constants :-
1088		b_or_z_mode,
1089		(b_get_machine_operation_max('$setup_constants',0) -> true
1090		; get_preference(maxNrOfInitialisations,0)).
1091		max_operations_zero_for_initialisation :-
1092		b_or_z_mode,
1093		(b_get_machine_operation_max('$initialise_machine',0) -> true
1094		; get_preference(maxNrOfInitialisations,0)).
1095
1096		get_max_enablings_per_operation(Max,OpName,DefaultPref,MaxForCall) :-
1097		(var(Max) -> get_max_enablings_per_operation_aux(OpName,Max,DefaultPref,RandomisedRestart)
1098		; RandomisedRestart=false),
1099		(RandomisedRestart=true,
1100		get_preference(randomise_enumeration_order,true)
1101		-> % we succeed Max times with the value 1, thus forcing a randomised restart
1102		MaxForCall=1, between(1,Max,Retry), format('Randomised Restart ~w for ~w~n',[Retry,OpName])
1103		; % we succeed once with the value Max
1104		MaxForCall is Max).
1105
1106		get_max_enablings_for_init(Max,OpName,MaxForCall) :-
1107		translate_operation_name(OpName,IOp),
1108		get_max_enablings_per_operation(Max,IOp,maxNrOfInitialisations,MaxForCall).
1109
1110		get_specific_max_operations_for_operation(OpName,MaxOp) :-
1111		b_or_z_mode,
1112		b_get_machine_operation_max(OpName,MaxOp).
1113
1114		:- use_module(bmachine,[b_get_machine_operation_time_out/2]).
1115		get_specific_time_out_for_operation(OpName,TimeOut) :-
1116		b_or_z_mode,
1117		b_get_machine_operation_time_out(OpName,TimeOut).
1118
1119		/* PROPERTIES */
1120
1121		property(const_and_vars(ConstID,Vars),Property) :- b_or_z_mode,
1122		expand_const_and_vars(ConstID,Vars,FullStore),!,
1123		property(FullStore,Property).
1124		property(csp_and_b(CSPState,BState),Property) :- animation_mode(csp_and_b),!,
1125		%% print(checking_csp_and_b(CSPState)),nl,
1126		expand_const_and_vars_to_full_store(BState,FBState),
1127		(xtl_interface:cspm_property(CSPState,Property) ;
1128		b_property(FBState,Property)).
1129		property(State,Property) :- animation_mode(AM),
1130		(AM = b -> b_property(State,Property)
1131		; AM=xtl -> xtl_interface:xtl_property(State,Property)
1132		; AM=cspm -> xtl_interface:cspm_property(State,Property)
1133		; AM=csp_and_b -> b_property(State,Property) % State should be root
1134		).
1135
1136		%b_property(const_and_vars(ConstID,Vars),Prop) :- !,
1137		% expand_const_and_vars(ConstID,Vars,FullStore),
1138		% b_property(FullStore,Prop).
1139		b_property(root,Prop) :- !, b_preference_par(PARA,Op,VAL), Prop=.. [Op,PARA,VAL].
1140		b_property([H|T],non_ground(Var)) :- debug:debug_mode(on),
1141		member(bind(Var,Val),[H|T]),\+(ground(Val)).
1142		b_property([H|T],Prop) :- elementary_prop([H|T],Prop).
1143		b_property([],Prop) :- elementary_prop([],Prop).
1144		b_property(concrete_constants(DB),Prop) :- elementary_prop(DB,Prop).
1145
1146
1147
1148		:- use_module(preferences).
1149		:- use_module(b_global_sets,[b_global_set/1, b_fd_card/2,inferred_minimum_global_set_cardinality/2,
1150		inferred_maximum_global_set_cardinality/2, unfixed_deferred_set/1]).
1151
1152		% preference values shown as properties of the root node
1153		b_preference_par('MAXINT','=',MaxInt) :- get_preference(maxint,MaxInt).
1154		b_preference_par('MININT','=',MinInt) :- get_preference(minint,MinInt).
1155		b_preference_par(card(GlobalSet),Op,Card) :-
1156		b_global_set(GlobalSet),
1157		b_fd_card(GlobalSet,RCard),
1158		% provide feedback if unfixed_deferred_set
1159		(inferred_maximum_global_set_cardinality(GlobalSet,MaxCard),
1160		(inferred_minimum_global_set_cardinality(GlobalSet,MinCard) -> true ; MinCard=1),
1161		MinCard \= MaxCard,
1162		Op = ':', Card = '..'(MinCard,MaxCard)
1163
1164		;
1165
1166		inferred_minimum_global_set_cardinality(GlobalSet,MinCard),
1167		\+ (inferred_maximum_global_set_cardinality(GlobalSet,_)),
1168		Op='>=',Card=MinCard % show minimum cardinality info
1169
1170		;
1171
1172		Op= '=', (unfixed_deferred_set(GlobalSet)
1173		-> ajoin([RCard,' (assumed for deferred set)'],Card) ; Card=RCard)
1174		).
1175
1176		/* --------------------------------------------------------- */
1177
1178
1179		elementary_prop(DB,Prop) :-
1180		member(bind(Var,Val),DB), %print(var_prop(Var)),nl_time,
1181		elementary_prop3(Val,Var,Prop).
1182
1183		:- use_module(custom_explicit_sets,[is_avl_relation/1,is_avl_partial_function/1,get_first_avl_elements/4, avl_approximate_size/3]).
1184		elementary_prop3(Val,Var,Prop) :- var(Val),!, Prop = '='(Var,'_VAR_').
1185		elementary_prop3(avl_set(Avl),Var,Prop) :- !,
1186		(show_avl_set(Avl) % \+ custom_explicit_sets:is_avl_sequence(Avl))
1187		-> elementary_fun_prop(avl_set(Avl),Var,Prop)
1188		; elementary_var_prop(avl_set(Avl),Var,Prop)).
1189		elementary_prop3([H|T],Var,Prop) :- H=(_,_),
1190		get_preference(show_function_tuples_in_property,true),!,
1191		elementary_fun_prop([H|T],Var,Prop).
1192		elementary_prop3(Val,Var,Prop) :- elementary_var_prop(Val,Var,Prop).
1193
1194		show_avl_set(AVL) :- get_preference(show_function_tuples_in_property,true),
1195		is_avl_relation(AVL),
1196		avl_approximate_size(AVL,0,Size), Size < 257, % only the first 30 will be shown by get_relation_element anyway
1197		is_avl_partial_function(AVL).
1198
1199
1200		:- use_module(bmachine,[b_is_variable/2]).
1201		elementary_var_prop(Val,Var,Prop) :-
1202		% TODO: use translate:translate_bvalue_for_expression/3
1203		animation_minor_mode(tla),!,
1204		( identifier_has_tla_type(Var,TlaType) ->
1205		translate_bvalue_with_tlatype(Val,TlaType,Text)
1206		;
1207		translate_bvalue(Val,Text)),
1208		Prop = '='(Var,Text).
1209		elementary_var_prop(Val,Var,Prop) :-
1210		(var_cst_type(Var,Type)
1211		-> translate_bvalue_with_type_and_limit(Val,Type,320,Text)
1212		; translate_bvalue_with_type_and_limit(Val,any,320,Text)), % translate_properties_with_limit uses 320 Limit
1213		Prop = '='(Var,Text).
1214
1215		identifier_has_tla_type(Id,Type) :-
1216		get_texpr_id(TId,Id),
1217		(b_get_machine_constants(Ids)
1218		;b_get_machine_variables(Ids)),
1219		member(TId,Ids),!,
1220		get_texpr_info(TId,Infos),
1221		memberchk(tla_type(Type),Infos).
1222		% to do: use b_is_variable + translate_bvalue_with_type
1223		elementary_fun_prop(Val,Var,Prop) :-
1224		simple(Prop), % will only succeed if Prop is var or atom; translate_bexpression will raise error if Prop is compound
1225		nonvar(Val),
1226		(var_cst_type(Var,Type),dom_range_type(Type,Dom,Ran) -> true ; Type=any,Dom=any, Ran=any),
1227		get_relation_element(Val,X,Y), % Show value in form: Var(X) = Y
1228		create_texpr(identifier(Var),Type,[],Fun),
1229		create_value(X,Dom,Arg),
1230		create_texpr(function(Fun,Arg),Ran,[],Lhs),
1231		create_value(Y,Ran,Rhs),
1232		create_texpr(equal(Lhs,Rhs),pred,[],Expr),
1233		translate_bexpression_with_limit(Expr,80,Prop).
1234
1235		var_cst_type(Name,Type) :- (b_is_variable(Name,Type) ; b_is_constant(Name,Type)).
1236		dom_range_type(seq(R),integer,R).
1237		dom_range_type(set(couple(D,R)),D,R).
1238
1239		get_relation_element(avl_set(A),X,Y) :- custom_explicit_sets:is_avl_relation(A),
1240		!, %preferences:preference(expand_avl_upto,Limit),
1241		Limit=30, % reduced limit, as now we can inspect with evaluation view
1242		get_first_avl_elements(A,Limit,Els,CutOff),
1243		(member((X,Y),Els), X\=term(_)
1244		;
1245		CutOff=not_all, X='...', Y='...').
1246		get_relation_element(Value,X,Y) :-
1247		member((X,Y),Value). /* otherwise we have a record structure */
1248
1249		create_value('...',_,R) :- !, R = b(string('...'),string,[]).
1250		create_value(X,T,R) :-
1251		create_texpr(value(X),T,[],R).
1252
1253
1254		:- use_module(bmachine,[b_show_machine_representation/4]).
1255		:- use_module(probcspsrc(haskell_csp_analyzer),[get_internal_csp_representation/1]).
1256		:- use_module(seqproversrc(sequent_prover_exports),[pretty_print_pos/1]).
1257		get_internal_representation(X) :- get_internal_representation(X,true,false,none).
1258		get_internal_representation(X,AdditionalInfo,UnsetMinorMode,Typing) :- animation_mode(AM),
1259		get_internal_aux(AM,X,AdditionalInfo,UnsetMinorMode,Typing).
1260		get_internal_aux(b,X,AdditionalInfo,UnsetMinorMode,Typing) :- !,
1261		b_show_machine_representation(X,AdditionalInfo,UnsetMinorMode,Typing).
1262		% UnsetMinorMode=true means we try and generate classical B syntax
1263		get_internal_aux(cspm,X,_,_,_) :- !, get_internal_csp_representation(X).
1264		get_internal_aux(csp_and_b,Res,AdditionalInfo,UnsetMinorMode,Typing) :- !,
1265		append("CSP||B - B Part only",X,Res),
1266		b_show_machine_representation(X,AdditionalInfo,UnsetMinorMode,Typing).
1267		get_internal_aux(xtl,Res,_,_,_) :- animation_minor_mode(sequent_prover), !,
1268		pretty_print_pos(Res).
1269		get_internal_aux(_,X,_,_,_) :- X="Internal representation only available in B or CSP mode".
1270
1271
1272		:- use_module(probcspsrc(haskell_csp),[channel/2]).
1273		:- use_module(bmachine,[b_top_level_operation/1, b_top_level_feasible_operation/1]).
1274		get_possible_event(OpName) :- b_or_z_mode,
1275		%b_is_operation_name(OpName).
1276		b_top_level_operation(OpName).
1277		get_possible_event(Channel) :- csp_mode,
1278		channel(Channel,_).
1279		% what about csp_and_b mode ?
1280
1281		get_feasible_event(OpName) :- b_or_z_mode,
1282		%b_is_operation_name(OpName).
1283		b_top_level_feasible_operation(OpName).
1284		get_feasible_event(Channel) :- csp_mode,
1285		channel(Channel,_).
1286
1287
1288		get_possible_language_specific_top_level_event(OpName,ResultNames,ParameterNames) :-
1289		b_or_z_mode,!,
1290		get_possible_b_top_level_event(OpName,ResultNames,ParameterNames).
1291		get_possible_language_specific_top_level_event(TransName,[],ParameterNames) :- xtl_mode, !,
1292		xtl_transition_parameters(TransName,ParameterNames).
1293		get_possible_language_specific_top_level_event(Channel,unknown,unknown) :- csp_mode,
1294		channel(Channel,_).
1295
1296		get_possible_b_top_level_event('$setup_constants',[],Ids) :-
1297		b_machine_has_constants_or_properties,
1298		b_get_machine_constants(TIds), maplist(get_texpr_id,TIds,Ids).
1299		get_possible_b_top_level_event('$initialise_machine',[],Ids) :-
1300		b_get_machine_variables(TIds), maplist(get_texpr_id,TIds,Ids).
1301		get_possible_b_top_level_event(OpName,ResultNames,ParameterNames) :-
1302		b_top_level_operation(OpName),
1303		%b_get_machine_operation(OpName,Results,RealParameters,_RealBody,_OType,_OpPos),
1304		b_get_machine_operation_for_animation(OpName,Results,AllParameters,_RealBody,_OType,_TL),
1305		maplist(get_texpr_id,Results,ResultNames),
1306		maplist(get_texpr_id,AllParameters,ParameterNames).
1307
1308		% obtain a textual description of specification category names
1309		get_specification_description(Category,Name) :-
1310		animation_mode(Mode),
1311		(animation_minor_mode(Minor) -> true ; Minor = none), % there could be several minor modes !
1312		(get_specific_description(Mode,Minor,Category,N) -> Name=N
1313		; get_default_description(Category,N) -> Name = N
1314		; add_error(get_specification_description,'Unknown category: ',Category),
1315		Name=Category).
1316
1317		get_specific_description(cspm,_,C,N) :- get_csp_description(C,N).
1318		get_specific_description(b,eventb,C,N) :- get_eventb_description(C,N).
1319		get_specific_description(b,tla,C,N) :- get_tla_description(C,N).
1320		get_specific_description(b,alloy,C,N) :- get_alloy_description(C,N).
1321
1322		get_csp_description(operations,'CHANNELS').
1323		get_csp_description(operation,'CHANNEL').
1324		get_csp_description(assertions,'CSP_ASSERTIONS').
1325		get_csp_description(machine,'CSP_SPECIFICATION').
1326		get_csp_description(operations_lc,'events').
1327
1328		get_tla_description(properties,'ASSUME').
1329		get_tla_description(machine,'MODULE').
1330		get_tla_description(operation,'ACTION'). % no key word
1331		get_tla_description(operations,'ACTIONS'). % no key word
1332		get_tla_description(operations_lc,'actions').
1333
1334		get_eventb_description(properties,'AXIOMS').
1335		get_eventb_description(assertions,'THEOREMS').
1336		get_eventb_description(operations,'EVENTS').
1337		get_eventb_description(operation,'EVENT').
1338		get_eventb_description(operations_lc,'events').
1339		get_eventb_description(machine,'MODEL').
1340
1341		get_alloy_description(machine,'MODULE').
1342		get_alloy_description(sets,'SIGNATURES'). % abstract
1343		get_alloy_description(operations,'RUNS').
1344		get_alloy_description(operation,'RUN').
1345
1346		get_default_description(constraints,'CONSTRAINTS').
1347		get_default_description(properties,'PROPERTIES').
1348		get_default_description(assertions,'ASSERTIONS').
1349		get_default_description(invariant,'INVARIANT').
1350		get_default_description(invariants,'INVARIANTS').
1351		get_default_description(operations,'OPERATIONS').
1352		get_default_description(operation,'OPERATION').
1353		get_default_description(operations_lc,'operations').
1354		get_default_description(machine,'MACHINE').
1355		get_default_description(constants,'CONSTANTS').
1356		get_default_description(variables,'VARIABLES').
1357		get_default_description(initialisation,'INITIALISATION').
1358		get_default_description(sets,'SETS').
1359		get_default_description(goal,'GOAL').
1360		get_default_description(definition,'DEFINITION').
1361		get_default_description(definitions,'DEFINITIONS').
1362		get_default_description(variants,'VARIANTS').