1		% (c) 2009-2024 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		build_up_b_real_operation/2,
54		expand_const_and_vars/3, expand_const_and_vars_to_full_store/2,
55		expand_to_constants_and_variables/3,
56
57		max_operations_zero_for_operation/1,
58		compute_operation_effect_max/6, % has replaced compute_operation_effect/5
59		create_setup_constants_operation/3,
60		get_internal_representation/1, get_internal_representation/4,
61		get_possible_event/1, get_feasible_event/1,
62		get_possible_language_specific_top_level_event/3,
63		get_specification_description/2,
64		get_local_states_for_operation_transition/4, create_local_store_for_operation/4
65		]).
66
67		:- use_module(tools).
68
69		:- use_module(module_information).
70		:- module_info(group,animator).
71		:- module_info(description,'This module computes transitions and properties depending on the current animator mode.').
72
73		:- use_module(library(lists)).
74		%:- use_module(library(avl)).
75		%:- use_module(library(clpfd)).
76
77		:- use_module(debug).
78		:- use_module(b_interpreter).
79		:- use_module(preferences).
80		:- use_module(self_check).
81		:- use_module(error_manager).
82		:- use_module(translate).
83		:- use_module(succeed_max,[succeed_max_call_id/3]).
84
85		:- use_module(store,[empty_state/1]).
86		:- use_module(bmachine).
87		:- use_module(bsyntaxtree).
88		:- use_module(xtl_interface).
89
90
91		%% :- use_module(delay).
92
93		:- use_module(value_persistance, [load_constants/2]).
94
95		:- set_prolog_flag(double_quotes, codes).
96
97		/* --------------------------------- */
98
99
100
101
102		/* --------------------------------- */
103		/* ANIMATION & TEMPORAL VERIFICATION */
104		/* --------------------------------- */
105
106
107		:- dynamic animation_mode/1, animation_minor_mode/1.
108		% not marking as volatile; otherwise we startup with no animation_mode set
109		% not all parts of ProB can deal with this at the moment
110		%:- volatile animation_mode/1, animation_minor_mode/1.
111
112		animation_mode(b).
113		% possible values: b, csp, xtl, z, csp_and_b, promela
114		% animation_minor_mode: possible values alloy, event_b, tla, z (classical B if no animation_minor_mode fact)
115
116		b_mode :- animation_mode(X), (X=b ; X=csp_and_b).
117		z_mode :- animation_mode(X), (X=b ; X=csp_and_b), animation_minor_mode(z).
118	?	classical_b_mode :- b_mode, (animation_minor_mode(Mode) -> classical_minor_mode(Mode) ; true).
119		classical_minor_mode(rules_dsl).
120
121		eventb_mode :-
122		animation_mode(X), (X=b ; X=csp_and_b),
123		animation_minor_mode(eventb).
124		csp_with_bz_mode :- animation_mode(csp_and_b).
125		z_or_tla_minor_mode :- animation_minor_mode(X), (X=tla ; X=z).
126
127		csp_mode :- animation_mode(X), csp_mode(X).
128		csp_mode(cspm).
129		csp_mode(csp_and_b).
130
131		xtl_mode :- animation_mode(xtl).
132
133		b_or_z_mode :-
134		(animation_mode(X) -> (X=b -> true ; X=csp_and_b)). % basically the same as b_mode
135		b_or_z_mode(b). b_or_z_mode(csp_and_b).
136
137		% is B syntax (ASCII/Unicode available for source files)
138		b_syntax_available_for_source :-
139		b_or_z_mode,
140		(animation_minor_mode(X) -> X=event_b ; true).
141
142		process_algebra_mode :- %Note: also covers xtl (Promela, CCS interpreters; see test 756); used for translating events (tau, tick, io(...))
143		animation_mode(X), X \= b,
144		\+ ((X=xtl, xtl_get_definition_string('PROCESS_ALGEBRA_MODE',false))).
145
146		set_animation_mode(X) :-
147		retractall(animation_mode(_)),
148		remove_animation_minor_mode,
149		assertz(animation_mode(X)).
150
151		set_animation_minor_mode(X) :-
152		remove_animation_minor_mode,
153		assertz(animation_minor_mode(X)).
154		remove_animation_minor_mode :-
155		retractall(animation_minor_mode(_)).
156
157		% use to temporarily unset animation minor mode:
158		:- use_module(library(lists),[maplist/2]).
159		unset_animation_minor_modes(L) :- findall(X,retract(animation_minor_mode(X)),L).
160		reset_animation_minor_modes(L) :- maplist(add_animation_minor_mode,L).
161
162		add_animation_minor_mode(X) :-
163		(animation_minor_mode(X) -> true ; assertz(animation_minor_mode(X))).
164
165
166		:- dynamic currently_opened_file_status/2.
167		:- volatile currently_opened_file_status/2.
168		%currently_opened_file(none).
169
170		:- use_module(bmachine,[b_machine_name/1]).
171		currently_opened_specification_name(Name) :-
172		(b_or_z_mode -> b_machine_name(Name)
173		; currently_opened_file(File),
174		get_modulename_filename(File,Name)
175		).
176
177		reset_currently_opened_file :- retractall(currently_opened_file_status(_,_)).
178		reset_specfile :- reset_currently_opened_file,
179		retractall(animation_minor_mode(_)).
180		:- use_module(eventhandling,[register_event_listener/3]).
181		:- register_event_listener(clear_specification,reset_specfile,
182		'Reset Specfile Currently Opened File.').
183
184		% call if a spec was not loaded from file but from package (e.g., via socket / prob2)
185		set_currently_opened_package(Type) :-
186		set_currently_opened_file(package(Type)).
187
188		% indicates we are in the process of opening a file
189		set_currently_opening_file(File) :-
190		reset_currently_opened_file,
191		assertz(currently_opened_file_status(File,opening)).
192
193		:- use_module(tools,[get_filename_extension/2]).
194		set_minor_animation_mode_from_file(File) :-
195		get_filename_extension(File,Extension),
196		file_extension_mode(Extension,Major,Minor),!,
197		animation_mode(CurMajor),
198		(CurMajor=Major
199		-> (animation_minor_mode(CurMinor)
200		-> (CurMinor=Minor -> true
201		; add_warning(specfile,'Minor animation mode incompatible with file:',CurMinor:File)
202		)
203		; Minor=none -> true
204		; set_animation_minor_mode(Minor)
205		)
206		; add_warning(specfile,'Major animation mode incompatible with file:',CurMajor:File)
207		).
208		set_minor_animation_mode_from_file(File) :- add_warning(specfile,'Unknown file extension:',File).
209
210		file_extension_mode(mch,b,none). % classical b, could also be csp_and_b
211		file_extension_mode(ref,b,none).
212		file_extension_mode(imp,b,none).
213		file_extension_mode(def,b,none).
214		file_extension_mode(sys,b,none).
215		file_extension_mode(rmch,b,rules_dsl).
216		file_extension_mode(prob,b,none). % Here we cannot infer the mode; TODO: in future store this info in the .prob file
217		file_extension_mode(tla,b,tla).
218		file_extension_mode(fuzz,b,z).
219		file_extension_mode(tex,b,z).
220		file_extension_mode(eventb,b,eventb).
221		file_extension_mode('P',xtl,none).
222		file_extension_mode(als,b,alloy).
223		file_extension_mode(csp,cspm,none).
224		file_extension_mode(cspm,cspm,none).
225
226		% store currently openend specification file and set B minor animation mode
227		set_currently_opened_b_file(File) :-
228		set_currently_opened_file(File),
229		set_minor_animation_mode_from_file(File).
230
231		set_currently_opened_file(File) :-
232		reset_currently_opened_file,
233		assertz(currently_opened_file_status(File,success)).
234
235		set_failed_to_open_file(File) :-
236		reset_currently_opened_file,
237		assertz(currently_opened_file_status(File,failure)).
238
239		currently_opened_file(File) :- currently_opened_file_status(File,success).
240
241
242		:- use_module(tools,[safe_absolute_file_name/3, get_parent_directory/2]).
243		% open a file relateive to the main B file
244		b_absolute_file_name_relative_to_opened_file(File,AbsFileName) :-
245		currently_opened_file_status(MainFileName,_Status), % _Status=failure happens when error during loading
246		get_parent_directory(MainFileName,Directory),
247		safe_absolute_file_name(File,AbsFileName,[relative_to(Directory)]).
248
249		spec_file_has_been_successfully_loaded :- currently_opened_file(_).
250
251		:- use_module(bmachine,[b_machine_has_variables/0]).
252		% true if state corresponds to an initialised B machine
253		state_corresponds_to_initialised_b_machine(const_and_vars(_,_)) :- !,
254		b_or_z_mode.
255		state_corresponds_to_initialised_b_machine(expanded_const_and_vars(_,_,_,_)) :- !,
256		b_or_z_mode.
257		state_corresponds_to_initialised_b_machine(expanded_vars(_,_)) :- !,
258		b_or_z_mode.
259		state_corresponds_to_initialised_b_machine([]).
260		state_corresponds_to_initialised_b_machine([_|_]).
261		state_corresponds_to_initialised_b_machine(csp_and_b(_,BState)) :-
262		csp_with_bz_mode,
263		state_corresponds_to_initialised_b_machine(BState).
264
265
266		% check if state corresponds to an initialised B machine, and if so return expanded State
267		state_corresponds_to_initialised_b_machine(const_and_vars(ConstID,Vars),State) :- !,
268		b_or_z_mode, expand_const_and_vars(ConstID,Vars,State).
269		state_corresponds_to_initialised_b_machine(expanded_const_and_vars(_ConstID,_Vars,FullStore,_),State) :- !,
270		% generated by prepare_state_for_specfile_trans
271		State=FullStore.
272		state_corresponds_to_initialised_b_machine(expanded_vars(FullStore,_),State) :- !,
273		% generated by prepare_state_for_specfile_trans
274		State=FullStore.
275		state_corresponds_to_initialised_b_machine([],[]).
276		state_corresponds_to_initialised_b_machine([H|T],[H|T]).
277		state_corresponds_to_initialised_b_machine(csp_and_b(_,BState),State) :-
278		csp_with_bz_mode,
279		state_corresponds_to_initialised_b_machine(BState,State).
280
281		% check if all variables, constants setup; also allows concrete_constants if no variables exist
282		state_corresponds_to_fully_setup_b_machine(concrete_constants(_)) :- !, b_or_z_mode,
283		\+ b_machine_has_variables.
284		state_corresponds_to_fully_setup_b_machine(X) :- state_corresponds_to_initialised_b_machine(X).
285
286		state_corresponds_to_fully_setup_b_machine(concrete_constants(Constants),State) :- !, b_or_z_mode,
287		\+ b_machine_has_variables, State=Constants.
288		state_corresponds_to_fully_setup_b_machine(X,State) :- state_corresponds_to_initialised_b_machine(X,State).
289
290		% check if we only have constants, no variable values yet
291		state_corresponds_to_set_up_constants_only(root,State) :- !, animation_mode(b),
292		\+ b_machine_has_constants_or_properties, State=[]. % relevant for test 960
293		state_corresponds_to_set_up_constants_only(concrete_constants(Constants),State) :- !,
294		b_or_z_mode, State=Constants.
295		state_corresponds_to_set_up_constants_only(csp_and_b(_,BState),State) :- !,
296		csp_with_bz_mode,
297		state_corresponds_to_set_up_constants_only(BState,State).
298
299		state_corresponds_to_set_up_constants(const_and_vars(_,_)) :- !. % avoid expansion
300		state_corresponds_to_set_up_constants(X) :- state_corresponds_to_set_up_constants(X,_).
301
302		state_corresponds_to_set_up_constants(const_and_vars(ConstID,Vars),State) :- !,
303		b_or_z_mode, expand_const_and_vars(ConstID,Vars,State).
304		state_corresponds_to_set_up_constants(expanded_const_and_vars(_ConstID,_Vars,FullStore,_),State) :- !,
305		% generated by prepare_state_for_specfile_trans
306		State=FullStore.
307		state_corresponds_to_set_up_constants(expanded_vars(FullStore,_),State) :- !,
308		% generated by prepare_state_for_specfile_trans
309		State=FullStore.
310		state_corresponds_to_set_up_constants(concrete_constants(Constants),State) :- !,
311		b_or_z_mode, State=Constants.
312		state_corresponds_to_set_up_constants(csp_and_b(_,BState),State) :- !,
313		csp_with_bz_mode,
314		state_corresponds_to_set_up_constants(BState,State).
315		state_corresponds_to_set_up_constants([],State) :- !, State=[],
316		animation_mode(b).
317		state_corresponds_to_set_up_constants(State,RState) :-
318		animation_mode(b),
319		(State = root -> \+ b_machine_has_constants_or_properties,RState=[] ; RState=State).
320
321		:- use_module(state_space,[current_expression/2]).
322		current_b_expression(CurBState) :-
323		current_expression(_CurID,CurState),
324		state_corresponds_to_set_up_constants(CurState,CurBState).
325
326
327
328		:- use_module(state_space, [current_state_id/1]).
329		:- use_module(bmachine, [determine_type_of_formula/2]).
330		% get a state sufficient to evaluate a given formula (expression or predicate)
331		% it will give an error is the machine is not sufficiently initialised
332		get_current_state_for_b_formula(TypedExpr,BState) :-
333		current_state_id(CurID),
334		get_state_for_b_formula(CurID,TypedExpr,BState).
335		get_state_for_b_formula(StateID,TypedExpr,BState) :-
336		(formula_class(TypedExpr) -> Type=TypedExpr % user already provided formula class
337		; determine_type_of_formula(TypedExpr,Type)),
338		get_state(Type,StateID,TypedExpr,BState).
339
340		formula_class(requires_nothing).
341		formula_class(requires_constants).
342		formula_class(requires_variables).
343
344		get_state(requires_nothing,_ID,_TE,[]).
345		get_state(requires_constants,StateID,TypedExpr,BState) :-
346		my_visited_expression(StateID,State),
347		(state_corresponds_to_set_up_constants(State,BState) -> true
348		; ajoin(['Please setup constants first, cannot evaluate (in state ',StateID,') :'],Msg),
349		add_error(get_state,Msg,TypedExpr,TypedExpr),fail).
350		get_state(requires_variables,StateID,TypedExpr,BState) :-
351		my_visited_expression(StateID,State),
352		(state_corresponds_to_initialised_b_machine(State,BState) -> true ;
353		ajoin(['Please initialise machine first, cannot evaluate (in state ',StateID,') :'],Msg),
354		add_error(get_state,Msg,TypedExpr,TypedExpr),fail).
355
356		:- use_module(state_space,[visited_expression/2]).
357		my_visited_expression(root,S) :- !,
358		S=root. % ensure we succeed even if no state space set (e.g. when no machine provided to probcli)
359		my_visited_expression(StateID,State) :- visited_expression(StateID,State).
360
361		/* TRANSITIONS */
362
363		:- use_module(tools_meta,[call_residue/2]).
364		% ---------------------------------------------------
365
366
367		% Tries to find successor state for Op in State DB. Fails, if no solution is possible
368		% Input: State DB, Operation Op
369		% Output: DB2 the sucessor state
370		% Residue: Unfinished co-routines (should not happen!)
371		%specfile_trans(DB,Op,DB2,[]) :- !, specfile:i_transition(DB,Op,DB2).
372		specfile_trans(DB,OpName,Op,DB2,TransInfo,Residue) :-
373		% i_transition(DB,OpName,Op,DB2,TransInfo), Residue = []. % is faster, but no residue checking
374		animation_mode(MODE),
375		call_residue(i_transition(MODE,DB,OpName,Op,DB2,TransInfo),Residue).
376
377		i_transition(b,State,OpName,Op,NewState,TransInfo) :- !,
378		b_trans(State,OpName,Op,NewState,TransInfo).
379		i_transition(xtl,State,OpName,Op,NewState,[]) :- !,
380		xtl_transition(State,Op,NewState), functor(Op,OpName,_).
381		i_transition(cspm,State,_OpName,Op,NewState,[]) :- !,
382		% Note: the OpName is ignored: we cannot make use of it
383		cspm_transition(State,Op,NewState).
384		%i_transition(promela,State,_OpName,Op,NewState,[]) :- !,
385		% promela_transition(State,Op,NewState).
386		% ; MODE=smv -> smv_transition(State,Op,NewState),TransInfo=[]
387		i_transition(csp_and_b,State,OpName,Op,NewState,TransInfo) :- !,
388		% Note: the OpName is either the name of a B operation or '$CSP' (or a variable)
389		csp_and_b_transition(State,OpName,Op,NewState,TransInfo).
390
391
392		% if you call specfile_trans multiple times for the same state, it is
393		% more efficient to call this predicate first once
394		prepare_state_for_specfile_trans(const_and_vars(ConstID,Vars),CurID,R) :- !, %print(expanding_const(ConstID)),nl,
395		R = expanded_const_and_vars(ConstID,Vars,FullStore,Infos),
396		expand_const_and_vars(ConstID,Vars,FullStore), %, print(full(FullStore)),nl.
397		prepare_infos(FullStore,CurID,Infos).
398		prepare_state_for_specfile_trans(FullStore,CurID,R) :- FullStore=[_|_],
399		prepare_infos(FullStore,CurID,Infos), Infos \=[],
400		!,
401		R = expanded_vars(FullStore,Infos).
402		prepare_state_for_specfile_trans(csp_and_b(CSP,BStore),CurID,csp_and_b(CSP,Res)) :- !,
403		prepare_state_for_specfile_trans(BStore,CurID,Res).
404		prepare_state_for_specfile_trans(X,_,X).
405
406		% a version with a memo argument to store expanded constants
407		prepare_state_for_specfile_trans(const_and_vars(ConstID,Vars),CurID,MEMO,R) :- !, %print(expanding_const(ConstID)),nl,
408		R = expanded_const_and_vars(ConstID,Vars,FullStore,Infos),
409		(nonvar(MEMO),MEMO = [ConstID/ConstantsStore]
410		% constants have already been previously extracted; e.g., in model_checker loop
411		-> %tools_printing:print_term_summary(memo(ConstID,ConstantsStore)),nl,
412		append(Vars,ConstantsStore,FullStore) % simply reuse expanded constants in MEMO
413		% used to be constants first, but has to be compatible with b_initialise_machine2 and expand_const_and_vars/3
414		; % expand_const_and_vars/3 inlined (so as to obtain ConstantsStore
415		visited_expression(ConstID,concrete_constants(ConstantsStore)), %% This can take a while if the Constants are big !
416		% print(no_memo(ConstID,MEMO)),tools_printing:print_term_summary(ConstantsStore),nl,
417		append(Vars,ConstantsStore,FullStore),
418		(var(MEMO)
419		-> MEMO=[ConstID/ConstantsStore] % store expanded constants to avoid unpacking again
420		; true)
421		), %, print(full(FullStore)),nl.
422		prepare_infos(FullStore,CurID,Infos).
423		prepare_state_for_specfile_trans(FullStore,CurID,_,R) :- FullStore=[_|_],
424		prepare_infos(FullStore,CurID,Infos), Infos \=[], !,
425		R = expanded_vars(FullStore,Infos).
426		prepare_state_for_specfile_trans(csp_and_b(CSP,BStore),CurID,MEMO,csp_and_b(CSP,Res)) :- !,
427		prepare_state_for_specfile_trans(BStore,CurID,MEMO,Res).
428		prepare_state_for_specfile_trans(X,_,_,X). % TODO: prepare infos as well if we have no constants
429
430		:- use_module(state_packing,[pack_state/2, get_packed_b_state_with_uncompressed_lists/2]).
431		% store some operation independent infos which are useful
432		prepare_infos(FullStore,CurID,Infos) :- CurID \= root,
433		(get_preference(try_operation_reuse,false)
434		-> Infos = []
435		% TO DO: check if we should enable this: get_preference(use_state_packing,true)
436		% TODO: we could check if there are operations which do not write all variables
437		; Infos=[packed_state/PackedList, state_id/CurID],
438		(CurID \= unknown, state_space:packed_visited_expression(CurID,PS),
439		get_packed_b_state_with_uncompressed_lists(PS,PackedList) % replace '$cst_vars' and compressed lists
440		-> true %,write('+')
441		; format('prepare_infos for state ~w: need to pack_values~n',[CurID]), % should ideally not happen
442		pack_state(FullStore,PS), % precompute state packing; will be re-used multiple times
443		get_packed_b_state_with_uncompressed_lists(PS,PackedList)
444		)
445		).
446
447		% extract pre-computed infos
448		extract_infos_from_prepared_state(expanded_const_and_vars(_,_,_,Infos),Res) :- !, Res=Infos.
449		extract_infos_from_prepared_state(expanded_vars(_,Infos),Res) :- !, Res=Infos.
450		extract_infos_from_prepared_state(_,[]).
451
452		remove_infos_from_prepared_state(expanded_const_and_vars(C,V,_,_),Res) :- !, Res=const_and_vars(C,V).
453		remove_infos_from_prepared_state(expanded_vars(V,_),R) :- !, R=V.
454		remove_infos_from_prepared_state(S,S).
455
456		% extract initialised variables from a state
457		extract_variables_from_state(const_and_vars(_,V),R) :- !,R=V.
458		extract_variables_from_state(expanded_const_and_vars(_,V,_,_),R) :- !,R=V.
459		extract_variables_from_state(expanded_vars(V,_),R) :- !,R=V.
460		extract_variables_from_state([],[]).
461		extract_variables_from_state([H|T],[H|T]).
462
463		:- use_module(probsrc(btypechecker),[prime_atom0/2]). % add $0 at end of variable
464		prime_binding(bind(ID,V),bind(PID,V)) :- prime_atom0(ID,PID).
465
466		extract_variables_from_state_as_primed(SrcState,PrimedVarBindings) :-
467		extract_variables_from_state(SrcState,VarVals),
468		maplist(prime_binding,VarVals,PrimedVarBindings).
469
470
471		/* can be attempted if trans fails to attempt to use partially computed transitions */
472		partial_trans(DB,Op,DB2,Residue) :-
473		call_residue(partial_i_transition(DB,Op,DB2),Residue).
474
475		partial_i_transition(root,'$partial_setup_constants',concrete_constants(ConstantsStore)) :-
476		animation_mode(b),
477		set_error_context(operation('$partial_setup_constants',root)),
478		b_interpreter:b_partial_set_up_concrete_constants(ConstantsStore).
479
480		% a predicate which automatically calls partial_trans :
481		specfile_trans_or_partial_trans(DB,OpName,Op,DB2,TransInfo,Residue,Partial) :-
482		if(specfile_trans(DB,OpName,Op,DB2,TransInfo,Residue),Partial=false,
483		(OpName='$setup_constants', % OpName is often an input argument here
484		TransInfo=[], Partial = true,
485		partial_trans(DB,Op,DB2,Residue))).
486
487		/* build up skeletons of possible operations; to be used before time_out call is made */
488		% currently only used in zmq worker.pl
489		specfile_possible_trans_name(State,OpName) :- animation_mode(MODE),
490		(MODE=b -> b_possible_trans_name(State,OpName)
491		; MODE = csp_and_b -> csp_b_possible_trans_name(State,OpName)
492		; setup_transition_skeleton(MODE,OpName) /* TO DO: add more possible skeletons */
493		).
494
495		% only set up skeletons if it is worth it for computing all successors
496		% 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)
497		specfile_possible_trans_name_for_successors(State,OpName) :- animation_mode(MODE),
498		(MODE=b
499		-> b_possible_trans_name(State,OpName)
500		; setup_transition_skeleton(MODE,OpName)
501		).
502
503		setup_transition_skeleton(_,_). /* TO DO: add more possible skeletons ? */
504
505		:- use_module(library(random)).
506		b_possible_trans_name(root,OpName) :- !,
507		(b_machine_has_constants_or_properties
508		-> OpName = '$setup_constants'
509		; OpName = '$initialise_machine').
510		b_possible_trans_name(concrete_constants(_),OpName) :- !, OpName = '$initialise_machine'.
511		b_possible_trans_name(_State,OpName) :-
512		(preferences:preference(randomise_operation_order,true),random(1,3,1)
513		-> b_machine_operation_names_in_reverse_order(OpName) ; true),
514		%b_get_machine_operation(OpName,_Res,_Params,_,_,_).
515		b_top_level_feasible_operation(OpName). % TO DO: we could link also with cbc feasibility analysis if carried out
516		% we could check: b_operation_cannot_modify_state(OpName) given a preference, in particular for SAFETY_MODEL_CHECK when operation already covered
517
518		csp_b_possible_trans_name(csp_and_b_root,OpName) :- !,
519		(b_machine_has_constants_or_properties
520		-> OpName = 'tau($setup_constants)'
521		; OpName = 'tau($initialise_machine)').
522		csp_b_possible_trans_name(concrete_constants(_),OpName) :- !,
523		OpName = 'tau($initialise_machine)'.
524		csp_b_possible_trans_name(State,OpName) :-
525		b_possible_trans_name(State,OpName).
526		% TO DO: add non-synchronised channels
527
528		% --------------
529
530		:- use_module(probcspsrc(haskell_csp),[channel_type_list/2, symbol/4]).
531		:- use_module(debug).
532		% check whether a currently open CSP is type compatible with a loaded B machine
533		type_check_csp_and_b :- animation_mode(csp_and_b), debug_println(9,type_check_csp_and_b),
534		b_get_machine_operation(ChannelOpName,Res,Params,_,_,_), append(Params,Res,ParamsRes),
535		channel_type_list(ChannelOpName,CSPTypeList),
536		% TO DO: also check B variable names which match channel name
537		debug_println(9,checking_synchronised_channel(ChannelOpName,ParamsRes,CSPTypeList)),
538		l_check_compatibility(ParamsRes,CSPTypeList,ChannelOpName),
539		fail.
540		type_check_csp_and_b.
541
542		%convert_csp_type_to_list(type(T),R) :- convert_csp_type_to_list2(T,R).
543		%convert_csp_type_to_list2(dotUnitType,[]).
544		%convert_csp_type_to_list2(dotTupleType(T),T).
545
546		l_check_compatibility([],[],_) :- !.
547		l_check_compatibility([B|BT],[CSP|CSPT],ChannelOpName) :- !, check_compatibility(B,CSP,ChannelOpName),
548		l_check_compatibility(BT,CSPT,ChannelOpName).
549		l_check_compatibility([],CSP,ChannelOpName) :- !,
550		add_error(type_check_csp_and_b,'CSP Channel has too many parameters: ', ChannelOpName:CSP).
551		l_check_compatibility(B,[],ChannelOpName) :- !,
552		print('* CSP Channel has too few parameters: '), print(ChannelOpName),nl,
553		print('* B Arguments will be ignored: '), l_print_bexpr_or_subst(B),nl.
554		%add_error(type_check_csp_and_b,'CSP Channel has too few parameters: ', ChannelOpName:B).
555
556		check_compatibility(b(identifier(ID),TYPE,INFO),CSP_TYPE,ChannelOpName) :- !,
557		(type_ok(TYPE,CSP_TYPE) -> true ;
558		% TO DO: pretty print B and CSP Types
559		add_error(type_check_csp_and_b,'Incompatible types between B and CSP: ',ChannelOpName:ID:(TYPE:CSP_TYPE),b(identifier(ID),TYPE,INFO))
560		).
561		check_compatibility(B,CSP,ChannelOpName) :- !,
562		add_internal_error('Illegal types: ',check_compatibility(B,CSP,ChannelOpName)).
563
564		% TO DO: needs to be refined much more;
565		type_ok(Type,CSPType) :-
566		(type_ok2(Type,CSPType) -> true
567		; add_error(type_check_csp_and_b,'Cannot be converted (B:CSP): ',Type:CSPType),fail).
568		type_ok2(boolean,X) :- !, is_csp_boolean_type(X).
569		type_ok2(integer,X) :- !, is_csp_integer_type(X).
570		type_ok2(string,CSP) :- !,is_csp_global_set_type(CSP,string).
571		type_ok2(set(T),CSP) :- !, is_csp_set_type(CSP,T).
572		% TO DO: what if we have set(couple(integer,T)) instead of seq(T) ?
573		% rye
574		% check set(couple(integer,T)) (seq type) in B
575		type_ok2(seq(T),CSP) :- !, is_csp_seq_type(CSP,T).
576		type_ok2(couple(A,B),CSP) :- !, is_csp_couple_type(CSP,A,B).
577		type_ok2(global(GS),CSP) :- !,is_csp_global_set_type(CSP,GS).
578		type_ok2(X,Y) :- print(unkown(X,Y)),nl.
579
580		is_csp_couple_type(setValue([na_tuple([A|Rest])|_]),TA,TB) :- type_ok(TA,setValue([A])),
581		check_rest_couple_els(Rest,TB).
582		is_csp_couple_type(typeTuple([A|Rest]),TA,TB) :- type_ok(TA,A), check_rest_couple(Rest,TB).
583
584		check_rest_couple_els([B],TB) :- !, type_ok(TB,setValue([B])).
585		check_rest_couple_els([B1|BRest],couple(TB1,TBRest)) :- type_ok(TB1,setValue([B1])),
586		check_rest_couple_els(BRest,TBRest).
587		check_rest_couple([B],TB) :- !, type_ok(TB,B).
588		check_rest_couple([B1|BRest],couple(TB1,TBRest)) :- type_ok(TB1,B1),
589		check_rest_couple(BRest,TBRest).
590
591		% rye
592		% check if it is couple(integer, T) type and return T in 2nd arguments
593		couple_int(couple(integer, T), T). % possible sequence
594
595		% rye: it's not correct to check only Head
596		% % for example, for CSP type, {{}, {(1,2),(2,3)}}. Its head is emptyset, but the second one is set of tuple
597		is_csp_set_type('Set'([H|_]),Type) :- type_ok(Type,H). % just check Head
598		% check the 2nd element in set in case the 1st is emptyset
599		is_csp_set_type(setValue([_|T]),Type) :-
600		T = [H1 | _], !,
601		% if it is set(couple(integer, T)), it can be a sequence type
602		(couple_int(Type, TH1) -> is_csp_seq_type(setValue(T), TH1)
603		; type_ok(Type,H1)
604		). % check the 2nd
605		% if it is only one element in set, just check the head
606		is_csp_set_type(setValue([H|T]),Type) :-
607		(couple_int(Type, TH1) -> is_csp_seq_type(setValue([H|T]), TH1)
608		; type_ok(Type,H)
609		). % just check Head
610
611		is_csp_seq_type('Seq'(H),Type) :- type_ok(Type,H).
612		is_csp_seq_type(setValue([H|_]),Type) :- H=list(L), is_csp_list(L,Type).
613		is_csp_list([],_).
614		is_csp_list([H|_],Type) :- type_ok(Type,setValue([H])).
615
616		is_csp_boolean_type(boolType).
617		is_csp_boolean_type(setValue([H|_])) :- is_csp_boolean_value(H).
618		is_csp_boolean_value(true).
619		is_csp_boolean_value(false).
620
621		is_csp_integer_type(intType).
622		is_csp_integer_type(setFromTo(_,_)).
623		is_csp_integer_type(setFrom(_)).
624		is_csp_integer_type(setValue([int(_)|_])).
625
626		is_csp_global_set_type(dataType(_),_GS). % TO DO CHECK MEMBERS
627		is_csp_global_set_type(setValue([]),_GS). % TO DO CHECK MEMBERS
628		is_csp_global_set_type(setValue([_|_]),_GS). % TO DO CHECK MEMBERS
629
630		% --------------
631
632
633		:- use_module(bmachine,[b_get_machine_operation/4]).
634		:- use_module(bsets_clp,[tuple_of/3]).
635		% compute transitions for a CSP || B specification
636		% Note: the OpName is either the name of a B machine operation (even if hidden) or '$CSP' (useful for ltsmin)
637		csp_and_b_transition(root,OpName,Op,NewState,TransInfo) :- !,
638		Op = start_cspm_MAIN, OpName=Op, NewState = csp_and_b_root,TransInfo = [].
639		csp_and_b_transition(csp_and_b_root,OpName,Trans,NewState,TransInfo) :- !,
640		Trans = tau(Op), OpName = '$CSP',
641		b_trans(root,_,Op,InitialBState,TransInfo),
642		(InitialBState = concrete_constants(_)
643		-> NewState = InitialBState
644		; csp_initialisation_for_b(InitialCSPState),
645		NewState = csp_and_b(InitialCSPState,InitialBState)
646		).
647		csp_and_b_transition(concrete_constants(C),OpName,Trans,NewState,TransInfo) :- !,
648		Trans = tau(Op), OpName = '$CSP',
649		b_trans(concrete_constants(C),_,Op,InitialBState,TransInfo),
650		csp_initialisation_for_b(InitialCSPState),
651		NewState = csp_and_b(InitialCSPState,InitialBState).
652		csp_and_b_transition(csp_and_b(CSPState,BState),OpName,EventVisibleToUser,csp_and_b(NewCSP,NewB),TransInfo) :-
653		!,
654		csp_transition_for_b(CSPState,ChOpName,ChArgs,CSPAction,NewCSP),
655		% TO DO: split up csp_transition_for_b: into two parts; second part converts datatypes and only called if linking op exists
656		%% print(csp_trans(ChOpName,ChArgs)),nl, %%
657		length(ChArgs,Len), length(OpArgs,Len),
658		b_transition_for_csp(ChOpName,CSPAction,ChArgs,OpArgs,BState,OpName,Operation,NewB,TransInfo),
659		hide_csp_event(CSPAction,Operation,EventVisibleToUser).
660		csp_and_b_transition(State,'$CSP',Op,NewState,[]) :-
661		% we have a pure CSP state: use CSP-M transition
662		cspm_transition(State,Op,NewState).
663
664		:- use_module(bmachine,[b_is_variable/1,b_is_constant/1]).
665		% compute the B counterpart for a CSP transition:
666		b_transition_for_csp(ChOpName,_CSPAction,ChArgs,OpArgs,BState,OpName,Operation,NewB,TransInfo) :-
667		build_up_b_operation_for_csp(ChOpName,OpArgs,Operation),
668		!,
669		OpName = ChOpName,
670		%% print_message(trying_b_trans(Operation,ChArgs,OpArgs)), %%
671		(get_preference(try_operation_reuse,false)
672		-> generate_b_operationargs_from_csp(ChArgs,OpArgs),
673		b_trans(BState,OpName,Operation,NewB,TransInfo)
674		;
675		% compute B transition without parameters so that we can cache
676		b_trans(BState,OpName,Operation,NewB,TransInfo),
677		% and unify afterwards
678		generate_b_operationargs_from_csp(ChArgs,OpArgs)
679		).
680		%%, print_message(csp_btrans(Operation)), %%.
681		b_transition_for_csp(ChOpName,_CSPAction,ChArgs,OpArgs,BState,OpName,Operation,NewB,TransInfo) :-
682		OpName = ChOpName,
683		(b_is_variable(ChOpName) ; b_is_constant(ChOpName)),
684		%% print(probing(ChOpName)),nl,
685		expand_const_and_vars_to_full_store(BState,FBState),
686		try_lookup_value_in_store_and_global_sets(ChOpName,FBState,IdValue),
687		!,
688		remove_infos_from_prepared_state(BState,NewB),
689		TransInfo=[],
690		/* interpret as probing operation: get value of var,cst,SET */
691		generate_b_operationargs_from_csp(ChArgs,OpArgs),
692		(OpArgs=[SingleVal]
693		-> SingleVal = IdValue, Operation='-->'(ChOpName,[IdValue])
694		; OpArgs=[Val1,Val2],
695		tuple_of(Val1,Val2,IdValue), /* from bsets_clp, use exact_element_of ??? */
696		OpCall =.. [ChOpName,Val1],
697		Operation='-->'(OpCall,[Val2])
698		).
699		b_transition_for_csp(_ChOpName,CSPAction,_ChArgs,_OpArgs,BState,OpName,Operation,NewB,TransInfo) :-
700		OpName = '$CSP', % all CSP events grouped together
701		remove_infos_from_prepared_state(BState,NewB),
702		TransInfo=[],
703		/* no B operation of the name; could be tau or tick or extra comm channel */
704		%Op1 =.. [ChOpName|OpArgs],
705		Operation = CSPAction. % removed csp(.) wrapper [for LTL model checker]
706
707		hide_csp_event(CSPAction,_,EventVisibleToUser) :-
708		symbol('HIDE_CSPB',_,Span,_),!, % if there is a HIDE_CSPB definition then we do MAIN [{| HIDE_CSPB |}] B_MACHINE \ {| HIDE_CSPB |}
709		haskell_csp:evaluate_argument(val_of('HIDE_CSPB',Span),EvCList),
710		% print(hide(EvCList,CSPAction)),nl,
711		haskell_csp:expand_channel_pattern_expression(EvCList,ECList,no_loc_info_available),
712		haskell_csp:cspm_hide_action(CSPAction,omega,ECList, Span, EventVisibleToUser,_).
713		hide_csp_event(_CSPAction,Operation,EventVisibleToUser) :-
714		% get_preference(csp_event_visible_to_user,true) -> EventVisibleToUser = CSPAction
715		EventVisibleToUser = Operation.
716
717		build_up_b_operation_for_csp(OpName,OpArgs,Operation) :- %print(csp(OpName,OpArgs,Operation)),nl,
718		nonvar(OpName),
719		b_get_machine_operation(OpName,Res,Params,_), %print(get_machine_op(OpName,Res,Params)),nl,
720		specfile:generate_args(OpArgs,Params,Res, BArgs,BResults,OpName), %print(gen_args(BArgs,BResults)),nl,
721		% 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
722		safe_univ(Op1,[OpName|BArgs]), %print(op1(Op1)),nl,
723		(BResults = [] -> Operation = Op1 ; Operation = '-->'(Op1,BResults)).
724
725		:- use_module(bmachine,[b_get_machine_operation_for_animation/6]).
726		build_up_b_real_operation(OpName,Operation) :-
727		b_get_machine_operation_for_animation(OpName,Res,Params,_,_,true), %true==TopLevel
728		length(Params,Len), length(OpArgs,Len),
729		length(Res,RLen), length(BResults,RLen),
730		safe_univ(Op1,[OpName|OpArgs]),
731		(BResults = [] -> Operation = Op1 ; Operation = '-->'(Op1,BResults)).
732
733		generate_args([],[],Res,[],BRes,_) :- length(Res,L), length(BRes,L).
734		generate_args([],[_Param|T],Res,[_|TA],BRes,OpName) :-
735		generate_args([],T,Res,TA,BRes,OpName).
736		generate_args([CSPArg|TC],[Param|T],Res,[CSPArg|TA],BRes,OpName) :- check_type_for_id(CSPArg,Param,OpName),
737		generate_args(TC,T,Res,TA,BRes,OpName).
738		generate_args([CSPArg|TC],[],[ReturnParam|TRes],[],[CSPArg|TBRes],OpName) :-
739		check_type_for_id(CSPArg,ReturnParam,OpName),
740		generate_args(TC,[],TRes,[],TBRes,OpName).
741		generate_args([H|T],[],[],[],[],OpName) :-
742		add_error(specfile,'CSP provides extra arguments: ',OpName:[H|T]).
743
744		check_type_for_id(Val,TID,OpName) :- get_texpr_type(TID,Type),
745		check_type(Type,Val,OpName:TID).
746
747		:- block check_type(?,-,?).
748		check_type(boolean,pred_true,_) :- !.
749		check_type(boolean,pred_false,_) :- !.
750		check_type(integer,int(_),_) :- !.
751		check_type(string,string(_),_) :- !.
752		check_type(global(GS),fd(_,GS),_) :- !.
753		check_type(couple(A,B),(VA,VB),OID) :- !, check_type(A,VA,OID), check_type(B,VB,OID).
754		check_type(set(_T),[],_) :- !.
755		check_type(set(_T),closure(_,_,_),_) :- !. % TO DO: check type signature of closure
756		check_type(set(T),[H|_],OID) :- !, check_type(T,H,OID).
757		check_type(set(T),avl_set((node(Y,_,_,_L,_R))),OID) :- !, check_type(T,Y,OID).
758		check_type(seq(T),V,OID) :- !, check_type(set(couple(integer,T)),V,OID).
759		% TO DO: record, freetype ; but do not appear in translation from CSP to B yet
760		check_type(Type,Value,OpName:TID) :-
761		def_get_texpr_id(TID,ID),
762		add_error(check_type_for_id,'Illegal CSP value for argument: ',OpName:ID:type(Type):value(Value)),
763		fail.
764
765		get_operation_internal_name(Op,Name) :- var(Op),!,
766		add_error(get_operation_internal_name,'Variable Transition: ',Op), Name=Op.
767		get_operation_internal_name('$initialise_machine',N) :- !, N='$initialise_machine'.
768		get_operation_internal_name('$setup_constants',N) :- !, N='$setup_constants'.
769		get_operation_internal_name('$partial_setup_constants',N) :- !, N='$partial_setup_constants'.
770		get_operation_internal_name(Op,Name) :- get_operation_name(Op,Name).
771
772		is_setup_constants_internal_name('$setup_constants').
773		is_setup_constants_internal_name('$partial_setup_constants').
774
775		% tool to get the basic operation/channel/event name of a transition:
776		get_operation_name(Op,Name) :- var(Op),!, add_error(get_operation_name,'Variable Transition: ',Op), Name=Op.
777		get_operation_name('-->'(F,_),N) :- !, functor(F,N,_).
778		%get_operation_name(io([Action|_],proc(_Nr,_PROC),_SPAN),F) :-
779		% animation_mode(promela),!,functor(Action,F,_).
780		get_operation_name(io(_V,Ch,_SPAN),N) :- csp_mode,!, functor(Ch,N,_).
781		get_operation_name(FullOperation,Name) :- functor(FullOperation,Functor,_),
782		translate_operation_name(Functor,Name).
783
784		get_operation_arguments(Op,Args) :- var(Op),!, add_error(get_operation_arguments,'Variable Transition: ',Op), Args=[].
785		get_operation_arguments('-->'(F,_ReturnValues),Args) :- !, F =.. [_|Args].
786		%get_operation_arguments(io([_Action|V],proc(_Nr,_PROC),_SPAN),Args) :-
787		% animation_mode(promela),!,Args=V.
788		get_operation_arguments(io(V,_Ch,_SPAN),Args) :- csp_mode,!, Args = V.
789		get_operation_arguments(FullOperation,Args) :- FullOperation =.. [_|Args].
790
791		get_operation_return_values_and_arguments('-->'(F,ReturnValues),ReturnValues,Args) :- !,
792		F =.. [_|Args].
793		get_operation_return_values_and_arguments(Op,[],Args) :- get_operation_arguments(Op,Args).
794
795		translate_operation_name('$initialise_machine',T) :- !,T='INITIALISATION'.
796		translate_operation_name('$setup_constants',T) :- !,T='SETUP_CONSTANTS'.
797		translate_operation_name('$partial_setup_constants',T) :- !,T='PARTIAL_SETUP_CONSTANTS'.
798		%translate_operation_name(InternalName,Res) :- !, Res=InternalName.
799		translate_operation_name(X,X).
800
801		:- use_module(bmachine,[b_get_operation_description/2]).
802		% get a textual description of a transition, based on description pragma
803		get_operation_description(OpTerm,Desc) :- b_or_z_mode,
804		get_operation_name(OpTerm,OpName),
805		b_get_operation_description(OpName,Desc).
806		% in future we could possible use operation parameter values to adapt description
807
808		:- use_module(probsrc(b_interpreter),[b_compute_expression_nowf/6]).
809		:- use_module(probsrc(bmachine),[get_operation_description_template_expr/2]).
810		% get a description for operation from a given state; to do: we could provide destination state
811		get_operation_description_for_transition(StateId,OpTerm,NextId,Desc) :- b_or_z_mode,
812		get_operation_name(OpTerm,OpName),
813		get_operation_description_template_expr(OpName,TemplateStringExpr),
814		visited_expression(NextId,State),
815		state_corresponds_to_initialised_b_machine(State,BState1),
816		visited_expression(StateId,BeforeState),
817		state_corresponds_to_initialised_b_machine(BeforeState,BState0),
818		extract_variables_from_state_as_primed(BState0,PrimedBefore),
819		append(PrimedBefore,BState1,BState),
820
821		% TODO: use NextId and add StateId as $0 vars
822		% maplist(create_primed_binding,InVariablesState,PrimedVars),
823		% append(PrimedVars,Out,PredState),
824		!,
825		get_local_state_for_operation_transition(OpName,OpTerm,LocalState),
826		%write(local_state(OpName,OpTerm,LocalState)),nl,
827		% TODO: process errors better
828		if(b_interpreter:b_compute_expression_nowf(TemplateStringExpr,LocalState,BState,string(SD),
829		operation_description(OpName),0),
830		Desc=SD,
831		(get_operation_description(OpTerm,D), ajoin(['Error evaluating template: ',D],Desc))
832		).
833		get_operation_description_for_transition(_StateId,OpTerm,_NextStateId,Desc) :-
834		get_operation_description(OpTerm,Desc).
835
836		get_local_state_for_operation_transition(OpName,OperationTerm,LocalState) :-
837		get_local_states_for_operation_transition(OpName,OperationTerm,ParaStore,ResultStore),
838		append(ResultStore,ParaStore,LocalState).
839
840		% get local states for parameter values and result values extracted from a B operation transition term
841		get_local_states_for_operation_transition(OpName,OperationTerm,ParaStore,ResultStore) :- b_or_z_mode,!,
842		get_operation_return_values_and_arguments(OperationTerm,ReturnValues,ParaValues),
843		(b_get_machine_operation_for_animation(OpName,Results,Parameters,_Body,_OType,_TopLevel,OpPos)
844		-> true
845		; is_setup_constants_internal_name(OpName) -> Results=[], Parameters=[], OpPos=unknown
846		; add_error(specfile,'Unrecognized operation: ',OpName),
847		Results=[], Parameters=[], OpPos=unknown
848		),
849		def_get_texpr_ids(Parameters,OpParameterNames), % also includes virtual parameters (show_eventb_any_arguments)
850		(ParaValues=[]
851		-> ParaStore=[]
852		; (OpParameterNames=[], ParaValues=[_|_]
853		-> (get_preference(show_eventb_any_arguments,true)
854		-> add_message(specfile,'Ignoring additional parameters for:',OpName,OpPos)
855		; add_warning(specfile,'Ignoring additional parameters for:',OpName,OpPos)
856		),
857		ParaStore = []
858		; create_local_store_for_operation(OpParameterNames,ParaValues,OpName,ParaStore)
859		)
860		),
861		(ReturnValues=[]
862		-> ResultStore = []
863		; %b_get_machine_operation_result_names(OpName,OpResults),
864		def_get_texpr_ids(Results,OpResults),
865		create_local_store_for_operation(OpResults,ReturnValues,OpName,ResultStore)
866		).
867		get_local_states_for_operation_transition(_OpName,OperationTerm,ParaStore,ResultStore) :- % not B mode
868		ResultStore = [],
869		get_operation_return_values_and_arguments(OperationTerm,ReturnValues,ParaValues),
870		ReturnValues = [], % should always succeed
871		gen_para_bind(ParaValues,1,ParaStore). % create [bind(para1,Val1),...]
872
873		gen_para_bind([],_,[]).
874		gen_para_bind([H|T],Nr,[bind(ParaNr,H)|BT]) :- ajoin([para,Nr],ParaNr),
875		N1 is Nr+1,
876		gen_para_bind(T,N1,BT).
877
878		% create a store from parameter names and values:
879		create_local_store_for_operation([],[],_,Store) :- !, Store=[].
880		create_local_store_for_operation([Name|NT],[Val|VT],OpName,[bind(Name,Val)|StoreT]) :- !,
881		create_local_store_for_operation(NT,VT,OpName,StoreT).
882		create_local_store_for_operation([Name|NT],[],OpName,Store) :- !,
883		ajoin(['Missing values for operation ',OpName,':'],Msg),
884		add_error(specfile,Msg,[Name|NT]),
885		Store = [].
886		create_local_store_for_operation(_,V,OpName,Store) :-
887		ajoin(['Too many values for operation ',OpName,':'],Msg),
888		add_error(specfile,Msg,V),
889		Store = [].
890
891		:- use_module(library(between),[between/3]).
892
893		b_trans(State,OpName,Operation,NewState,PathInfo) :-
894		compute_operation_effect_max(State,OpName,Operation,NewState,PathInfo,_Max).
895
896		:- use_module(store,[store_updates_and_normalise/3]).
897
898		compute_operation_effect_max([],OpName,Operation,NewState,PathInfo,Max) :-
899		compute_operation_updates_on_expanded_store([],OpName,Operation,Updates,PathInfo,Max),
900		store_updates_and_normalise(Updates,[],NewState).
901		compute_operation_effect_max([H|T],OpName,Operation,NewState,PathInfo,Max) :-
902		compute_operation_updates_on_expanded_store([H|T],OpName,Operation,Updates,PathInfo,Max),
903		store_updates_and_normalise(Updates,[H|T],NewState).
904		compute_operation_effect_max(const_and_vars(ConstID,Vars),OpName,Operation,ResultingStore,PathInfo,Max) :-
905		prepare_state_for_specfile_trans(const_and_vars(ConstID,Vars),unknown,R),
906		%print(expanded_const_and_vars(ConstID)),nl,
907		compute_operation_effect_max(R,OpName,Operation,ResultingStore,PathInfo,Max).
908		compute_operation_effect_max(expanded_const_and_vars(ID,Vars,FullStore,Infos),OpName,Operation,NewState,PathInfo,Max) :-
909		compute_operation_updates_on_expanded_store(expanded_const_and_vars(ID,Vars,FullStore,Infos),
910		OpName,Operation,Updates,PathInfo,Max),
911		NewState = const_and_vars(ID,NewVars),
912		store_updates_and_normalise(Updates,Vars,NewVars).
913		compute_operation_effect_max(expanded_vars(FullStore,Infos),OpName,Operation,NewState,PathInfo,Max) :-
914		compute_operation_updates_on_expanded_store(expanded_vars(FullStore,Infos),
915		OpName,Operation,Updates,PathInfo,Max),
916		store_updates_and_normalise(Updates,FullStore,NewState).
917
918		compute_operation_effect_max(concrete_constants(ConstantsStore),'$initialise_machine',OpInit,ResultingStore,PathInfo,Max) :-
919		get_max_enablings_for_init(Max,'$initialise_machine',MaxForCall),
920		succeed_max_call_id('$initialise_machine',
921		b_interpreter:b_initialise_machine(ConstantsStore,InitialVars,InitialStore,PathInfo),MaxForCall),
922		create_initialisation_operation(InitialVars,OpInit),
923		(\+ preferences:preference(symmetry_mode,flood), /* TO DO : improve permutation to allow using const_and_vars optimisation */
924		visited_expression(ConstID,concrete_constants(ConstantsStore))
925		-> ResultingStore = const_and_vars(ConstID,InitialVars) /* avoid storing constant values again */
926		; ResultingStore = InitialStore).
927		compute_operation_effect_max(root,'$setup_constants',OpSetup,concrete_constants(FilteredConstantsStore),[],Max) :-
928		b_machine_has_constants_or_properties,
929		get_max_enablings_for_init(Max,'$setup_constants',MaxForCall),
930		compute_constants(ConstantsStore,MaxForCall,Complete),
931		create_setup_constants_operation(ConstantsStore,Complete,OpSetup),
932		%%print_message('FOUND_CONSTANTS'(OpName)),
933		(get_preference(filter_unused_constants,true) % possibly disable if VisB or Custom Graph Definitions exist
934		-> exclude(unused_binding,ConstantsStore,FilteredConstantsStore)
935		; FilteredConstantsStore=ConstantsStore).
936		compute_operation_effect_max(root,'$initialise_machine',OpInit,InitialStore,PathInfo,Max) :-
937		\+ b_machine_has_constants_or_properties,
938		get_max_enablings_for_init(Max,'$initialise_machine',MaxForCall),
939		empty_state(EmptyState),
940		succeed_max_call_id('$initialise_machine',
941		b_interpreter:b_initialise_machine(EmptyState,InitialVars,InitialStore,PathInfo),MaxForCall),
942		create_initialisation_operation(InitialVars,OpInit).
943
944
945		unused_binding(bind(C,_)) :- bmachine:b_is_unused_constant(C).
946
947		compute_constants(ConstantsStore,_Max,C) :-
948		% check if values have been computed and stored into a file before -- if yes, use them
949		load_constants(Stores,MaxReached),!,
950		C = complete_properties, % TODO: check that only complete properties stored or that we store this info
951		choose_loaded_solution(Stores,ConstantsStore,MaxReached).
952		compute_constants(ConstantsStore,Max,Complete) :-
953		% print('Searching for valid CONSTANTS'),nl,!,
954		succeed_max_call_id('$setup_constants',b_interpreter:b_set_up_concrete_constants(ConstantsStore,Complete),Max).
955
956		choose_loaded_solution(Stores,ConstantsStore,_MaxReached) :-
957		member(ConstantsStore,Stores).
958		choose_loaded_solution(_Stores,_ConstantsStore,true) :-
959		% provoke the setting of the "maximum reached flag"
960		succeed_max_call_id('$setup_constants',member(_,_),1),fail.
961
962		expand_const_and_vars_to_full_store(root,R) :- !,R=[].
963		expand_const_and_vars_to_full_store(concrete_constants(ConstantsStore),FullStore) :- !,
964		ConstantsStore = FullStore.
965		expand_const_and_vars_to_full_store(const_and_vars(ConstID,Vars),FullStore) :- !,
966		expand_const_and_vars(ConstID,Vars,FullStore).
967		expand_const_and_vars_to_full_store(expanded_const_and_vars(_ConstID,_Vars,ExpStore,_),FullStore) :- !,
968		FullStore = ExpStore.
969		expand_const_and_vars_to_full_store(expanded_vars(ExpStore,_),FullStore) :- !,
970		FullStore = ExpStore.
971		expand_const_and_vars_to_full_store(csp_and_b(_,BState),FullStore) :- !,
972		expand_const_and_vars_to_full_store(BState,FullStore).
973		expand_const_and_vars_to_full_store(R,R).
974
975		expand_const_and_vars(ConstID,Vars,FullStore) :-
976		visited_expression(ConstID,concrete_constants(ConstantsStore)),
977		%% This can take a while if the Constants are big !
978		% print('exp: '),tools_printing:print_term_summary(ConstantsStore),nl,
979		append(Vars,ConstantsStore,FullStore). % used to be Constants first, now consistent with b_initialise_machine2,
980		% b_initialise_machine2 puts constants at end to make sharing of complete tail-list easier for successor states
981
982		expand_to_constants_and_variables(root,[],[]).
983		expand_to_constants_and_variables(concrete_constants(ConstStore),ConstStore,[]).
984		expand_to_constants_and_variables(const_and_vars(ConstID,VarStore),ConstStore,VarStore) :-
985		visited_expression(ConstID,concrete_constants(ConstStore)).
986		expand_to_constants_and_variables([],[],[]).
987		expand_to_constants_and_variables([H|T],[],[H|T]).
988		expand_to_constants_and_variables(csp_and_b(_,BState),ConstStore,VarStore) :-
989		expand_to_constants_and_variables(BState,ConstStore,VarStore).
990
991		:- use_module(extrasrc(b_operation_cache),[compute_operation_on_expanded_store_cache/6]).
992
993		% compute operation effect on a store where all constants have been put into the environment
994		compute_operation_updates_on_expanded_store(InState,OpName,Operation,NewState,PathInfo,Max) :-
995		get_preference(try_operation_reuse,V), V \= false,
996		b_or_z_mode, % now works with CSP || B
997		%\+ animation_minor_mode(eventb), % projection used to confuse Event-B interpreter, see test 2138
998		!,
999		get_max_enablings_per_operation(Max,OpName,MaxForCall),
1000		compute_operation_on_expanded_store_cache(OpName,Operation,InState,NewState,PathInfo,MaxForCall).
1001		compute_operation_updates_on_expanded_store(Store,OpName,Operation,Updates,PathInfo,Max) :-
1002		extract_full_store(Store,FullStore),!,
1003		compute_operation_on_expanded_store2(FullStore,OpName,Operation,Updates,PathInfo,Max).
1004		compute_operation_updates_on_expanded_store(InState,OpName,Operation,Updates,PathInfo,Max) :-
1005		compute_operation_on_expanded_store2(InState,OpName,Operation,Updates,PathInfo,Max).
1006
1007		compute_operation_on_expanded_store2(InState,OpName,Operation,Updates,PathInfo,Max) :-
1008		get_max_enablings_per_operation(Max,OpName,MaxForCall),
1009		succeed_max_call_id(OpName,
1010		b_interpreter:b_execute_top_level_operation_update(OpName,Operation,InState,Updates,PathInfo),
1011		MaxForCall).
1012
1013		extract_full_store(expanded_const_and_vars(_,_,FS,_),Res) :- !, Res=FS.
1014		extract_full_store(expanded_vars(FS,_),Res) :- !, Res=FS.
1015
1016		create_initialisation_operation(_InitialVars,'$initialise_machine').
1017
1018		create_setup_constants_operation(_ConstantVars,complete_properties,R) :- !, R='$setup_constants'.
1019		create_setup_constants_operation(_ConstantVars,_,'$partial_setup_constants').
1020
1021		:- use_module(bmachine,[b_get_machine_operation_max/2]). % MAX_OPERATIONS_... DEFINITIONS
1022		get_max_enablings_per_operation_aux(OpName,RMax,RandomisedRestart) :-
1023		b_get_machine_operation_max(OpName,Max),
1024		!,
1025		(Max<0 -> RMax is -Max, RandomisedRestart=true ; RMax=Max, RandomisedRestart=false).
1026		get_max_enablings_per_operation_aux(_OpName,Max,false) :-
1027		preferences:preference(maxNrOfEnablingsPerOperation,Max).
1028
1029		max_operations_zero_for_operation(OpName) :-
1030		b_or_z_mode,
1031		b_top_level_operation(OpName),
1032		(b_get_machine_operation_max(OpName,0) -> true
1033		; get_preference(maxNrOfEnablingsPerOperation,0)).
1034
1035		get_max_enablings_per_operation(Max,OpName,MaxForCall) :-
1036		(var(Max) -> get_max_enablings_per_operation_aux(OpName,Max,RandomisedRestart) ; RandomisedRestart=false),
1037		(RandomisedRestart=true,
1038		get_preference(randomise_enumeration_order,true)
1039		-> % we succeed Max times with the value 1, thus forcing a randomised restart
1040		MaxForCall=1, between(1,Max,Retry), format('Randomised Restart ~w for ~w~n',[Retry,OpName])
1041		; % we succeed once with the value Max
1042		MaxForCall is Max).
1043
1044		get_max_enablings_for_init(Max,Op,MaxForCall) :-
1045		(var(Max) -> get_preference(maxNrOfInitialisations,Max) ; true),
1046		(Max>1,
1047		get_preference(randomisedRestartInitalisations,true),
1048		get_preference(randomise_enumeration_order,true)
1049		-> % we succeed Max times with the value 1, thus forcing a randomised restart
1050		MaxForCall=1, between(1,Max,Retry), format('Randomised Restart ~w for ~w~n',[Retry,Op])
1051		; % we succeed once with the value Max
1052		MaxForCall=Max).
1053
1054		/* PROPERTIES */
1055
1056		property(const_and_vars(ConstID,Vars),Property) :- b_or_z_mode,
1057		expand_const_and_vars(ConstID,Vars,FullStore),!,
1058		property(FullStore,Property).
1059		property(csp_and_b(CSPState,BState),Property) :- animation_mode(csp_and_b),!,
1060		%% print(checking_csp_and_b(CSPState)),nl,
1061		expand_const_and_vars_to_full_store(BState,FBState),
1062		(xtl_interface:cspm_property(CSPState,Property) ;
1063		b_property(FBState,Property)).
1064		property(State,Property) :- animation_mode(AM),
1065		(AM = b -> b_property(State,Property)
1066		; AM=xtl -> xtl_interface:xtl_property(State,Property)
1067		; AM=cspm -> xtl_interface:cspm_property(State,Property)
1068		; AM=csp_and_b -> b_property(State,Property) % State should be root
1069		).
1070
1071		%b_property(const_and_vars(ConstID,Vars),Prop) :- !,
1072		% expand_const_and_vars(ConstID,Vars,FullStore),
1073		% b_property(FullStore,Prop).
1074		b_property(root,Prop) :- !, b_preference_par(PARA,Op,VAL), Prop=.. [Op,PARA,VAL].
1075		b_property([H|T],non_ground(Var)) :- debug:debug_mode(on),
1076		member(bind(Var,Val),[H|T]),\+(ground(Val)).
1077		b_property([H|T],Prop) :- elementary_prop([H|T],Prop).
1078		b_property([],Prop) :- elementary_prop([],Prop).
1079		b_property(concrete_constants(DB),Prop) :- elementary_prop(DB,Prop).
1080
1081
1082
1083		:- use_module(preferences).
1084		:- use_module(b_global_sets,[b_global_set/1, b_fd_card/2,inferred_minimum_global_set_cardinality/2,
1085		inferred_maximum_global_set_cardinality/2, unfixed_deferred_set/1]).
1086
1087		% preference values shown as properties of the root node
1088		b_preference_par('MAXINT','=',MaxInt) :- get_preference(maxint,MaxInt).
1089		b_preference_par('MININT','=',MinInt) :- get_preference(minint,MinInt).
1090		b_preference_par(card(GlobalSet),Op,Card) :-
1091		b_global_set(GlobalSet),
1092		b_fd_card(GlobalSet,RCard),
1093		% provide feedback if unfixed_deferred_set
1094		(inferred_maximum_global_set_cardinality(GlobalSet,MaxCard),
1095		(inferred_minimum_global_set_cardinality(GlobalSet,MinCard) -> true ; MinCard=1),
1096		MinCard \= MaxCard,
1097		Op = ':', Card = '..'(MinCard,MaxCard)
1098
1099		;
1100
1101		inferred_minimum_global_set_cardinality(GlobalSet,MinCard),
1102		\+ (inferred_maximum_global_set_cardinality(GlobalSet,_)),
1103		Op='>=',Card=MinCard % show minimum cardinality info
1104
1105		;
1106
1107		Op= '=', (unfixed_deferred_set(GlobalSet)
1108		-> ajoin([RCard,' (assumed for deferred set)'],Card) ; Card=RCard)
1109		).
1110
1111		/* --------------------------------------------------------- */
1112
1113
1114		elementary_prop(DB,Prop) :-
1115		member(bind(Var,Val),DB), %print(var_prop(Var)),nl_time,
1116		elementary_prop3(Val,Var,Prop).
1117
1118		:- use_module(custom_explicit_sets,[is_avl_relation/1,is_avl_partial_function/1,get_first_avl_elements/4, avl_approximate_size/3]).
1119		elementary_prop3(Val,Var,Prop) :- var(Val),!, Prop = '='(Var,'_VAR_').
1120		elementary_prop3(avl_set(Avl),Var,Prop) :- !,
1121		(show_avl_set(Avl) % \+ custom_explicit_sets:is_avl_sequence(Avl))
1122		-> elementary_fun_prop(avl_set(Avl),Var,Prop)
1123		; elementary_var_prop(avl_set(Avl),Var,Prop)).
1124		elementary_prop3([H|T],Var,Prop) :- H=(_,_),
1125		get_preference(show_function_tuples_in_property,true),!,
1126		elementary_fun_prop([H|T],Var,Prop).
1127		elementary_prop3(Val,Var,Prop) :- elementary_var_prop(Val,Var,Prop).
1128
1129		show_avl_set(AVL) :- get_preference(show_function_tuples_in_property,true),
1130		is_avl_relation(AVL),
1131		avl_approximate_size(AVL,0,Size), Size < 257, % only the first 30 will be shown by get_relation_element anyway
1132		is_avl_partial_function(AVL).
1133
1134
1135		:- use_module(bmachine,[b_is_variable/2]).
1136		elementary_var_prop(Val,Var,Prop) :-
1137		% TODO: use translate:translate_bvalue_for_expression/3
1138		animation_minor_mode(tla),!,
1139		( identifier_has_tla_type(Var,TlaType) ->
1140		translate_bvalue_with_tlatype(Val,TlaType,Text)
1141		;
1142		translate_bvalue(Val,Text)),
1143		Prop = '='(Var,Text).
1144		elementary_var_prop(Val,Var,Prop) :-
1145		(var_cst_type(Var,Type)
1146		-> translate_bvalue_with_type_and_limit(Val,Type,320,Text)
1147		; translate_bvalue_with_type_and_limit(Val,any,320,Text)), % translate_properties_with_limit uses 320 Limit
1148		Prop = '='(Var,Text).
1149
1150		identifier_has_tla_type(Id,Type) :-
1151		get_texpr_id(TId,Id),
1152		(b_get_machine_constants(Ids)
1153		;b_get_machine_variables(Ids)),
1154		member(TId,Ids),!,
1155		get_texpr_info(TId,Infos),
1156		memberchk(tla_type(Type),Infos).
1157		% to do: use b_is_variable + translate_bvalue_with_type
1158		elementary_fun_prop(Val,Var,Prop) :-
1159		simple(Prop), % will only succeed if Prop is var or atom; translate_bexpression will raise error if Prop is compound
1160		nonvar(Val),
1161		(var_cst_type(Var,Type),dom_range_type(Type,Dom,Ran) -> true ; Type=any,Dom=any, Ran=any),
1162		get_relation_element(Val,X,Y), % Show value in form: Var(X) = Y
1163		create_texpr(identifier(Var),Type,[],Fun),
1164		create_value(X,Dom,Arg),
1165		create_texpr(function(Fun,Arg),Ran,[],Lhs),
1166		create_value(Y,Ran,Rhs),
1167		create_texpr(equal(Lhs,Rhs),pred,[],Expr),
1168		translate_bexpression_with_limit(Expr,80,Prop).
1169
1170		var_cst_type(Name,Type) :- (b_is_variable(Name,Type) ; b_is_constant(Name,Type)).
1171		dom_range_type(seq(R),integer,R).
1172		dom_range_type(set(couple(D,R)),D,R).
1173
1174		get_relation_element(avl_set(A),X,Y) :- custom_explicit_sets:is_avl_relation(A),
1175		!, %preferences:preference(expand_avl_upto,Limit),
1176		Limit=30, % reduced limit, as now we can inspect with evaluation view
1177		get_first_avl_elements(A,Limit,Els,CutOff),
1178		(member((X,Y),Els), X\=term(_)
1179		;
1180		CutOff=not_all, X='...', Y='...').
1181		get_relation_element(Value,X,Y) :-
1182		member((X,Y),Value). /* otherwise we have a record structure */
1183
1184		create_value('...',_,R) :- !, R = b(string('...'),string,[]).
1185		create_value(X,T,R) :-
1186		create_texpr(value(X),T,[],R).
1187
1188
1189		:- use_module(bmachine,[b_show_machine_representation/4]).
1190		:- use_module(probcspsrc(haskell_csp_analyzer),[get_internal_csp_representation/1]).
1191		get_internal_representation(X) :- get_internal_representation(X,true,false,none).
1192		get_internal_representation(X,AdditionalInfo,UnsetMinorMode,Typing) :- animation_mode(AM),
1193		get_internal_aux(AM,X,AdditionalInfo,UnsetMinorMode,Typing).
1194		get_internal_aux(b,X,AdditionalInfo,UnsetMinorMode,Typing) :- !,
1195		b_show_machine_representation(X,AdditionalInfo,UnsetMinorMode,Typing).
1196		% UnsetMinorMode=true means we try and generate classical B syntax
1197		get_internal_aux(cspm,X,_,_,_) :- !, get_internal_csp_representation(X).
1198		get_internal_aux(csp_and_b,Res,AdditionalInfo,UnsetMinorMode,Typing) :- !,
1199		append("CSP||B - B Part only",X,Res),
1200		b_show_machine_representation(X,AdditionalInfo,UnsetMinorMode,Typing).
1201		get_internal_aux(_,X,_,_,_) :- X="Internal representation only available in B or CSP mode".
1202
1203
1204		:- use_module(probcspsrc(haskell_csp),[channel/2]).
1205		:- use_module(bmachine,[b_top_level_operation/1, b_top_level_feasible_operation/1]).
1206		get_possible_event(OpName) :- b_or_z_mode,
1207		%b_is_operation_name(OpName).
1208		b_top_level_operation(OpName).
1209		get_possible_event(Channel) :- csp_mode,
1210		channel(Channel,_).
1211		% what about csp_and_b mode ?
1212
1213		get_feasible_event(OpName) :- b_or_z_mode,
1214		%b_is_operation_name(OpName).
1215		b_top_level_feasible_operation(OpName).
1216		get_feasible_event(Channel) :- csp_mode,
1217		channel(Channel,_).
1218
1219
1220		get_possible_language_specific_top_level_event(OpName,ResultNames,ParameterNames) :-
1221		b_or_z_mode,!,
1222		get_possible_b_top_level_event(OpName,ResultNames,ParameterNames).
1223		get_possible_language_specific_top_level_event(Channel,unknown,unknown) :- csp_mode,
1224		channel(Channel,_).
1225
1226		get_possible_b_top_level_event('$setup_constants',[],Ids) :-
1227		b_machine_has_constants_or_properties,
1228		b_get_machine_constants(TIds), maplist(get_texpr_id,TIds,Ids).
1229		get_possible_b_top_level_event('$initialise_machine',[],Ids) :-
1230		b_get_machine_variables(TIds), maplist(get_texpr_id,TIds,Ids).
1231		get_possible_b_top_level_event(OpName,ResultNames,ParameterNames) :-
1232		b_top_level_operation(OpName),
1233		%b_get_machine_operation(OpName,Results,RealParameters,_RealBody,_OType,_OpPos),
1234		b_get_machine_operation_for_animation(OpName,Results,AllParameters,_RealBody,_OType,_TL),
1235		maplist(get_texpr_id,Results,ResultNames),
1236		maplist(get_texpr_id,AllParameters,ParameterNames).
1237
1238		% obtain a textual description of specification category names
1239		get_specification_description(Category,Name) :-
1240		animation_mode(Mode),
1241		(animation_minor_mode(Minor) -> true ; Minor = none), % there could be several minor modes !
1242		(get_specific_description(Mode,Minor,Category,N) -> Name=N
1243		; get_default_description(Category,N) -> Name = N
1244		; add_error(get_specification_description,'Unknown category: ',Category),
1245		Name=Category).
1246
1247		get_specific_description(cspm,_,C,N) :- get_csp_description(C,N).
1248		get_specific_description(b,eventb,C,N) :- get_eventb_description(C,N).
1249		get_specific_description(b,tla,C,N) :- get_tla_description(C,N).
1250		get_specific_description(b,alloy,C,N) :- get_alloy_description(C,N).
1251
1252		get_csp_description(operations,'CHANNELS').
1253		get_csp_description(operation,'CHANNEL').
1254		get_csp_description(assertions,'CSP_ASSERTIONS').
1255		get_csp_description(machine,'CSP_SPECIFICATION').
1256		get_csp_description(operations_lc,'events').
1257
1258		get_tla_description(properties,'ASSUME').
1259		get_tla_description(machine,'MODULE').
1260		get_tla_description(operation,'ACTION'). % no key word
1261		get_tla_description(operations,'ACTIONS'). % no key word
1262		get_tla_description(operations_lc,'actions').
1263
1264		get_eventb_description(properties,'AXIOMS').
1265		get_eventb_description(assertions,'THEOREMS').
1266		get_eventb_description(operations,'EVENTS').
1267		get_eventb_description(operation,'EVENT').
1268		get_eventb_description(operations_lc,'events').
1269		get_eventb_description(machine,'MODEL').
1270
1271		get_alloy_description(machine,'MODULE').
1272		get_alloy_description(sets,'SIGNATURES'). % abstract
1273		get_alloy_description(operations,'RUNS').
1274		get_alloy_description(operation,'RUN').
1275
1276		get_default_description(constraints,'CONSTRAINTS').
1277		get_default_description(properties,'PROPERTIES').
1278		get_default_description(assertions,'ASSERTIONS').
1279		get_default_description(invariant,'INVARIANT').
1280		get_default_description(invariants,'INVARIANTS').
1281		get_default_description(operations,'OPERATIONS').
1282		get_default_description(operation,'OPERATION').
1283		get_default_description(operations_lc,'operations').
1284		get_default_description(machine,'MACHINE').
1285		get_default_description(constants,'CONSTANTS').
1286		get_default_description(variables,'VARIABLES').
1287		get_default_description(initialisation,'INITIALISATION').
1288		get_default_description(sets,'SETS').
1289		get_default_description(goal,'GOAL').
1290		get_default_description(definition,'DEFINITION').
1291		get_default_description(definitions,'DEFINITIONS').
1292		get_default_description(variants,'VARIANTS').