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boolbv.cpp
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1/*******************************************************************\
2
3Module:
4
5Author: Daniel Kroening, kroening@kroening.com
6
7\*******************************************************************/
8
9#include "boolbv.h"
10
11#include <util/arith_tools.h>
12#include <util/bitvector_expr.h>
14#include <util/byte_operators.h>
15#include <util/config.h>
16#include <util/floatbv_expr.h>
17#include <util/magic.h>
18#include <util/mp_arith.h>
19#include <util/simplify_expr.h>
20#include <util/std_expr.h>
22
24
25#include "literal_vector_expr.h"
26
27#include <algorithm>
28
30{
31 const bool little_endian =
33 return endianness_map(type, little_endian);
34}
35
40 const exprt &expr,
41 std::optional<std::size_t> expected_width)
42{
43 // check cache first
44 std::pair<bv_cachet::iterator, bool> cache_result=
45 bv_cache.insert(std::make_pair(expr, bvt()));
46
47 // get a reference to the cache entry
48 auto &cache_entry = cache_result.first->second;
49
50 if(!cache_result.second)
51 {
52 // Found in cache
53 return cache_entry;
54 }
55
56 // Iterators into hash_maps do not remain valid when inserting
57 // more elements recursively. C++11 ยง23.2.5/13
58 // However, the _reference_ to the entry does!
59 cache_entry = convert_bitvector(expr);
60
62 !expected_width || cache_entry.size() == *expected_width,
63 "bitvector width shall match the indicated expected width",
66
67 // check
68 for(const auto &literal : cache_entry)
69 {
70 if(freeze_all && !literal.is_constant())
71 prop.set_frozen(literal);
72
74 literal.var_no() != literalt::unused_var_no(),
75 "variable number must be different from the unused variable number",
78 }
79
80 return cache_entry;
81}
82
84{
85 if(expr.type().id() == ID_bool)
86 return prop_conv_solvert::handle(expr);
87 auto bv = convert_bv(expr);
88 set_frozen(bv); // for incremental usage
89 return literal_vector_exprt{bv, expr.type()};
90}
91
95{
96 ignoring(expr);
97
98 // try to make it free bits
99 std::size_t width=boolbv_width(expr.type());
100 return prop.new_variables(width);
101}
102
109{
110 if(expr.is_boolean())
111 return {convert(expr)};
112
113 if(expr.id()==ID_index)
114 return convert_index(to_index_expr(expr));
115 else if(expr.id()==ID_constraint_select_one)
117 else if(expr.id()==ID_member)
118 return convert_member(to_member_expr(expr));
119 else if(expr.id()==ID_with)
120 return convert_with(to_with_expr(expr));
121 else if(expr.id()==ID_update)
122 return convert_update(to_update_expr(expr));
123 else if(expr.id() == ID_update_bit)
125 else if(expr.id()==ID_case)
126 return convert_case(expr);
127 else if(expr.id()==ID_cond)
128 return convert_cond(to_cond_expr(expr));
129 else if(expr.id()==ID_if)
130 return convert_if(to_if_expr(expr));
131 else if(expr.is_constant())
133 else if(expr.id()==ID_typecast)
135 else if(expr.id()==ID_symbol)
136 return convert_symbol(to_symbol_expr(expr));
137 else if(expr.id()==ID_plus || expr.id()==ID_minus ||
138 expr.id()=="no-overflow-plus" ||
139 expr.id()=="no-overflow-minus")
140 return convert_add_sub(expr);
141 else if(expr.id() == ID_mult)
142 return convert_mult(to_mult_expr(expr));
143 else if(expr.id()==ID_div)
144 return convert_div(to_div_expr(expr));
145 else if(expr.id()==ID_mod)
146 return convert_mod(to_mod_expr(expr));
147 else if(expr.id()==ID_shl || expr.id()==ID_ashr || expr.id()==ID_lshr ||
148 expr.id()==ID_rol || expr.id()==ID_ror)
149 return convert_shift(to_shift_expr(expr));
150 else if(
151 expr.id() == ID_floatbv_plus || expr.id() == ID_floatbv_minus ||
152 expr.id() == ID_floatbv_mult || expr.id() == ID_floatbv_div)
153 {
155 }
156 else if(expr.id() == ID_floatbv_mod)
158 else if(expr.id() == ID_floatbv_rem)
160 else if(expr.id()==ID_floatbv_typecast)
162 else if(expr.id()==ID_concatenation)
164 else if(expr.id()==ID_replication)
166 else if(expr.id()==ID_extractbits)
168 else if(expr.id() == ID_zero_extend)
169 return convert_bitvector(to_zero_extend_expr(expr).lower());
170 else if(expr.id()==ID_bitnot || expr.id()==ID_bitand ||
171 expr.id()==ID_bitor || expr.id()==ID_bitxor ||
172 expr.id()==ID_bitxnor || expr.id()==ID_bitnor ||
173 expr.id()==ID_bitnand)
174 return convert_bitwise(expr);
175 else if(expr.id() == ID_unary_minus)
177 else if(expr.id()==ID_unary_plus)
178 {
179 return convert_bitvector(to_unary_plus_expr(expr).op());
180 }
181 else if(expr.id()==ID_abs)
182 return convert_abs(to_abs_expr(expr));
183 else if(expr.id() == ID_bswap)
184 return convert_bswap(to_bswap_expr(expr));
185 else if(expr.id()==ID_byte_extract_little_endian ||
186 expr.id()==ID_byte_extract_big_endian)
188 else if(expr.id()==ID_byte_update_little_endian ||
189 expr.id()==ID_byte_update_big_endian)
191 else if(expr.id()==ID_nondet_symbol ||
192 expr.id()=="quant_symbol")
193 return convert_symbol(expr);
194 else if(expr.id()==ID_struct)
195 return convert_struct(to_struct_expr(expr));
196 else if(expr.id()==ID_union)
197 return convert_union(to_union_expr(expr));
198 else if(expr.id() == ID_empty_union)
200 else if(expr.id()==ID_string_constant)
201 return convert_bitvector(
203 else if(expr.id() == ID_named_term)
204 {
205 const auto &named_term_expr = to_named_term_expr(expr);
206 set_to_true(equal_exprt(named_term_expr.symbol(), named_term_expr.value()));
207 return convert_symbol(named_term_expr.symbol());
208 }
209 else if(expr.id()==ID_array)
210 return convert_array(expr);
211 else if(expr.id()==ID_complex)
212 return convert_complex(to_complex_expr(expr));
213 else if(expr.id()==ID_complex_real)
215 else if(expr.id()==ID_complex_imag)
217 else if(expr.id() == ID_array_comprehension)
219 else if(expr.id()==ID_array_of)
221 else if(expr.id()==ID_let)
222 return convert_let(to_let_expr(expr));
223 else if(expr.id()==ID_function_application)
226 else if(expr.id()==ID_reduction_or || expr.id()==ID_reduction_and ||
227 expr.id()==ID_reduction_nor || expr.id()==ID_reduction_nand ||
228 expr.id()==ID_reduction_xor || expr.id()==ID_reduction_xnor)
230 else if(expr.id()==ID_not)
231 return convert_not(to_not_expr(expr));
232 else if(expr.id()==ID_power)
233 return convert_power(to_binary_expr(expr));
234 else if(expr.id() == ID_popcount)
235 return convert_bv(simplify_expr(to_popcount_expr(expr).lower(), ns));
236 else if(expr.id() == ID_count_leading_zeros)
237 {
238 return convert_bv(
240 }
241 else if(expr.id() == ID_count_trailing_zeros)
242 {
243 return convert_bv(
245 }
246 else if(expr.id() == ID_bitreverse)
248 else if(expr.id() == ID_saturating_minus || expr.id() == ID_saturating_plus)
250 else if(
251 const auto overflow_with_result =
253 {
254 return convert_overflow_result(*overflow_with_result);
255 }
256 else if(expr.id() == ID_find_first_set)
257 return convert_bv(simplify_expr(to_find_first_set_expr(expr).lower(), ns));
258 else if(expr.id() == ID_literal_vector)
259 return to_literal_vector_expr(expr).bv();
260
261 return conversion_failed(expr);
262}
263
265{
266 std::size_t width=boolbv_width(expr.type());
267
268 const exprt &array_size = expr.type().size();
269
270 const auto size = numeric_cast_v<mp_integer>(to_constant_expr(array_size));
271
272 typet counter_type = expr.arg().type();
273
274 bvt bv;
275 bv.resize(width);
276
277 for(mp_integer i = 0; i < size; ++i)
278 {
279 exprt counter=from_integer(i, counter_type);
280
281 exprt body = expr.instantiate({counter});
282
283 const bvt &tmp = convert_bv(body);
284
285 INVARIANT(
286 size * tmp.size() == width,
287 "total bitvector width shall equal the number of operands times the size "
288 "per operand");
289
290 std::size_t offset = numeric_cast_v<std::size_t>(i * tmp.size());
291
292 for(std::size_t j=0; j<tmp.size(); j++)
293 bv[offset+j]=tmp[j];
294 }
295
296 return bv;
297}
298
300{
301 const typet &type=expr.type();
302 std::size_t width=boolbv_width(type);
303
304 const irep_idt &identifier = expr.get(ID_identifier);
305 CHECK_RETURN(!identifier.empty());
306
307 bvt bv = map.get_literals(identifier, type, width);
308
310 std::all_of(
311 bv.begin(),
312 bv.end(),
313 [this](const literalt &l) {
314 return l.var_no() < prop.no_variables() || l.is_constant();
315 }),
316 "variable number of non-constant literals should be within bounds",
317 id2string(identifier));
318
319 return bv;
320}
321
322
324 const function_application_exprt &expr)
325{
326 // record
327 functions.record(expr);
328
329 // make it free bits
330 return prop.new_variables(boolbv_width(expr.type()));
331}
332
333
335{
336 PRECONDITION(expr.is_boolean());
337
338 if(expr.id()==ID_typecast)
340 else if(expr.id()==ID_equal)
341 return convert_equality(to_equal_expr(expr));
342 else if(expr.id()==ID_verilog_case_equality ||
343 expr.id()==ID_verilog_case_inequality)
345 else if(expr.id()==ID_notequal)
346 {
347 const auto &notequal_expr = to_notequal_expr(expr);
348 return !convert_equality(
349 equal_exprt(notequal_expr.lhs(), notequal_expr.rhs()));
350 }
351 else if(expr.id()==ID_ieee_float_equal ||
352 expr.id()==ID_ieee_float_notequal)
353 {
355 }
356 else if(expr.id()==ID_le || expr.id()==ID_ge ||
357 expr.id()==ID_lt || expr.id()==ID_gt)
358 {
360 }
361 else if(expr.id()==ID_extractbit)
363 else if(expr.id()==ID_forall)
365 else if(expr.id()==ID_exists)
367 else if(expr.id()==ID_let)
368 {
369 bvt bv=convert_let(to_let_expr(expr));
370
371 DATA_INVARIANT(bv.size()==1,
372 "convert_let must return 1-bit vector for boolean let");
373
374 return bv[0];
375 }
376 else if(expr.id()==ID_index)
377 {
379 CHECK_RETURN(bv.size() == 1);
380 return bv[0];
381 }
382 else if(expr.id()==ID_member)
383 {
385 CHECK_RETURN(bv.size() == 1);
386 return bv[0];
387 }
388 else if(expr.id()==ID_case)
389 {
390 bvt bv=convert_case(expr);
391 CHECK_RETURN(bv.size() == 1);
392 return bv[0];
393 }
394 else if(expr.id()==ID_cond)
395 {
396 bvt bv = convert_cond(to_cond_expr(expr));
397 CHECK_RETURN(bv.size() == 1);
398 return bv[0];
399 }
400 else if(expr.id()==ID_sign)
401 {
402 const auto &op = to_sign_expr(expr).op();
403 const bvt &bv = convert_bv(op);
404 CHECK_RETURN(!bv.empty());
405 const irep_idt type_id = op.type().id();
406 if(type_id == ID_signedbv || type_id == ID_fixedbv || type_id == ID_floatbv)
407 return bv[bv.size()-1];
408 if(type_id == ID_unsignedbv)
409 return const_literal(false);
410 }
411 else if(expr.id()==ID_reduction_or || expr.id()==ID_reduction_and ||
412 expr.id()==ID_reduction_nor || expr.id()==ID_reduction_nand ||
413 expr.id()==ID_reduction_xor || expr.id()==ID_reduction_xnor)
414 return convert_reduction(to_unary_expr(expr));
415 else if(expr.id()==ID_onehot || expr.id()==ID_onehot0)
416 return convert_onehot(to_unary_expr(expr));
417 else if(
418 const auto binary_overflow =
420 {
421 return convert_binary_overflow(*binary_overflow);
422 }
423 else if(
424 const auto unary_overflow =
426 {
427 return convert_unary_overflow(*unary_overflow);
428 }
429 else if(expr.id()==ID_isnan)
430 {
431 const auto &op = to_unary_expr(expr).op();
432 const bvt &bv = convert_bv(op);
433
434 if(op.type().id() == ID_floatbv)
435 {
436 float_utilst float_utils(prop, to_floatbv_type(op.type()));
437 return float_utils.is_NaN(bv);
438 }
439 else if(op.type().id() == ID_fixedbv)
440 return const_literal(false);
441 }
442 else if(expr.id()==ID_isfinite)
443 {
444 const auto &op = to_unary_expr(expr).op();
445 const bvt &bv = convert_bv(op);
446
447 if(op.type().id() == ID_floatbv)
448 {
449 float_utilst float_utils(prop, to_floatbv_type(op.type()));
450 return prop.land(
451 !float_utils.is_infinity(bv),
452 !float_utils.is_NaN(bv));
453 }
454 else if(op.id() == ID_fixedbv)
455 return const_literal(true);
456 }
457 else if(expr.id()==ID_isinf)
458 {
459 const auto &op = to_unary_expr(expr).op();
460 const bvt &bv = convert_bv(op);
461
462 if(op.type().id() == ID_floatbv)
463 {
464 float_utilst float_utils(prop, to_floatbv_type(op.type()));
465 return float_utils.is_infinity(bv);
466 }
467 else if(op.type().id() == ID_fixedbv)
468 return const_literal(false);
469 }
470 else if(expr.id()==ID_isnormal)
471 {
472 const auto &op = to_unary_expr(expr).op();
473
474 if(op.type().id() == ID_floatbv)
475 {
476 const bvt &bv = convert_bv(op);
477 float_utilst float_utils(prop, to_floatbv_type(op.type()));
478 return float_utils.is_normal(bv);
479 }
480 else if(op.type().id() == ID_fixedbv)
481 return const_literal(true);
482 }
483 else if(expr.id() == ID_function_application)
484 {
486 return prop.new_variable();
487 }
488
489 return SUB::convert_rest(expr);
490}
491
493{
495 return true;
496
497 const typet &type = expr.lhs().type();
498
499 if(
500 expr.lhs().id() == ID_symbol && type == expr.rhs().type() &&
501 type.id() != ID_bool)
502 {
503 // see if it is an unbounded array
504 if(is_unbounded_array(type))
505 return true;
506
507 const bvt &bv1=convert_bv(expr.rhs());
508
509 const irep_idt &identifier=
511
512 map.set_literals(identifier, type, bv1);
513
514 if(freeze_all)
515 set_frozen(bv1);
516
517 return false;
518 }
519
520 return true;
521}
522
523void boolbvt::set_to(const exprt &expr, bool value)
524{
525 PRECONDITION(expr.is_boolean());
526
527 const auto equal_expr = expr_try_dynamic_cast<equal_exprt>(expr);
528 if(value && equal_expr && !boolbv_set_equality_to_true(*equal_expr))
529 return;
530 SUB::set_to(expr, value);
531}
532
533bool boolbvt::is_unbounded_array(const typet &type) const
534{
535 if(type.id()!=ID_array)
536 return false;
537
539 return true;
540
541 const auto &size_opt = bv_width.get_width_opt(type);
542 if(!size_opt.has_value())
543 return true;
544
546 if(*size_opt > MAX_FLATTENED_ARRAY_SIZE)
547 return true;
548
549 return false;
550}
551
553{
554 // to ensure freshness of the new identifiers
556
558 result.reserve(binding.variables().size());
559
560 for(const auto &binding : binding.variables())
561 {
562 const auto &old_identifier = binding.get_identifier();
563
564 // produce a new identifier
565 const irep_idt new_identifier =
566 "boolbvt::scope::" + std::to_string(scope_counter) +
567 "::" + id2string(old_identifier);
568
569 result.emplace_back(new_identifier, binding.type());
570 }
571
572 return result;
573}
574
575void boolbvt::print_assignment(std::ostream &out) const
576{
578 map.show(out);
579}
580
582{
583 const struct_typet::componentst &components = src.components();
584 offset_mapt dest;
585 dest.reserve(components.size());
586 std::size_t offset = 0;
587 for(const auto &comp : components)
588 {
589 dest.push_back(offset);
590 offset += boolbv_width(comp.type());
591 }
592 return dest;
593}
configt config
Definition config.cpp:25
constant_exprt from_integer(const mp_integer &int_value, const typet &type)
Target numeric_cast_v(const mp_integer &arg)
Convert an mp_integer to integral type Target An invariant will fail if the conversion is not possibl...
API to expression classes for bitvectors.
const replication_exprt & to_replication_expr(const exprt &expr)
Cast an exprt to a replication_exprt.
const shift_exprt & to_shift_expr(const exprt &expr)
Cast an exprt to a shift_exprt.
const popcount_exprt & to_popcount_expr(const exprt &expr)
Cast an exprt to a popcount_exprt.
const extractbits_exprt & to_extractbits_expr(const exprt &expr)
Cast an exprt to an extractbits_exprt.
const find_first_set_exprt & to_find_first_set_expr(const exprt &expr)
Cast an exprt to a find_first_set_exprt.
const update_bit_exprt & to_update_bit_expr(const exprt &expr)
Cast an exprt to an update_bit_exprt.
const bswap_exprt & to_bswap_expr(const exprt &expr)
Cast an exprt to a bswap_exprt.
const count_leading_zeros_exprt & to_count_leading_zeros_expr(const exprt &expr)
Cast an exprt to a count_leading_zeros_exprt.
const bitreverse_exprt & to_bitreverse_expr(const exprt &expr)
Cast an exprt to a bitreverse_exprt.
const extractbit_exprt & to_extractbit_expr(const exprt &expr)
Cast an exprt to an extractbit_exprt.
const concatenation_exprt & to_concatenation_expr(const exprt &expr)
Cast an exprt to a concatenation_exprt.
const zero_extend_exprt & to_zero_extend_expr(const exprt &expr)
Cast an exprt to a zero_extend_exprt.
const count_trailing_zeros_exprt & to_count_trailing_zeros_expr(const exprt &expr)
Cast an exprt to a count_trailing_zeros_exprt.
Pre-defined bitvector types.
const floatbv_typet & to_floatbv_type(const typet &type)
Cast a typet to a floatbv_typet.
Expression classes for byte-level operators.
const byte_update_exprt & to_byte_update_expr(const exprt &expr)
const byte_extract_exprt & to_byte_extract_expr(const exprt &expr)
Expression to define a mapping from an argument (index) to elements.
Definition std_expr.h:3418
const array_typet & type() const
Definition std_expr.h:3432
const symbol_exprt & arg() const
Definition std_expr.h:3442
const exprt & size() const
Definition std_types.h:840
const namespacet & ns
Definition arrays.h:56
exprt & lhs()
Definition std_expr.h:668
exprt & rhs()
Definition std_expr.h:678
A base class for variable bindings (quantifiers, let, lambda)
Definition std_expr.h:3112
variablest & variables()
Definition std_expr.h:3133
exprt instantiate(const exprt::operandst &) const
substitute free occurrences of the variables in where() by the given values
Definition std_expr.cpp:225
std::vector< symbol_exprt > variablest
Definition std_expr.h:3114
virtual bvt convert_with(const with_exprt &expr)
virtual bvt convert_array(const exprt &expr)
Flatten array.
virtual literalt convert_bv_rel(const binary_relation_exprt &)
Flatten <, >, <= and >= expressions.
bv_cachet bv_cache
Definition boolbv.h:135
virtual literalt convert_onehot(const unary_exprt &expr)
virtual bvt convert_index(const exprt &array, const mp_integer &index)
index operator with constant index
virtual const bvt & convert_bv(const exprt &expr, const std::optional< std::size_t > expected_width={})
Convert expression to vector of literalts, using an internal cache to speed up conversion if availabl...
Definition boolbv.cpp:39
std::size_t scope_counter
Definition boolbv.h:283
virtual bvt convert_constraint_select_one(const exprt &expr)
virtual bvt convert_complex_imag(const complex_imag_exprt &expr)
virtual literalt convert_reduction(const unary_exprt &expr)
virtual literalt convert_ieee_float_rel(const binary_relation_exprt &)
virtual bvt convert_complex_real(const complex_real_exprt &expr)
virtual bvt convert_complex(const complex_exprt &expr)
virtual bvt convert_let(const let_exprt &)
virtual bvt convert_byte_extract(const byte_extract_exprt &expr)
offset_mapt build_offset_map(const struct_typet &src)
Definition boolbv.cpp:581
virtual bvt convert_bitvector(const exprt &expr)
Converts an expression into its gate-level representation and returns a vector of literals correspond...
Definition boolbv.cpp:108
binding_exprt::variablest fresh_binding(const binding_exprt &)
create new, unique variables for the given binding
Definition boolbv.cpp:552
virtual literalt convert_typecast(const typecast_exprt &expr)
conversion from bitvector types to boolean
virtual bvt convert_bswap(const bswap_exprt &expr)
bool is_unbounded_array(const typet &type) const override
Definition boolbv.cpp:533
virtual bvt convert_mod(const mod_exprt &expr)
virtual bvt convert_add_sub(const exprt &expr)
virtual bvt convert_constant(const constant_exprt &expr)
virtual literalt convert_quantifier(const quantifier_exprt &expr)
virtual bool boolbv_set_equality_to_true(const equal_exprt &expr)
Definition boolbv.cpp:492
virtual bvt convert_mult(const mult_exprt &expr)
exprt handle(const exprt &) override
Generate a handle, which is an expression that has the same value as the argument in any model that i...
Definition boolbv.cpp:83
virtual bvt convert_member(const member_exprt &expr)
virtual literalt convert_verilog_case_equality(const binary_relation_exprt &expr)
virtual bvt convert_function_application(const function_application_exprt &expr)
Definition boolbv.cpp:323
virtual bvt convert_cond(const cond_exprt &)
virtual bvt convert_empty_union(const empty_union_exprt &expr)
virtual bvt convert_if(const if_exprt &expr)
Definition boolbv_if.cpp:12
virtual bvt convert_union(const union_exprt &expr)
void set_to(const exprt &expr, bool value) override
For a Boolean expression expr, add the constraint 'expr' if value is true, otherwise add 'not expr'.
Definition boolbv.cpp:523
virtual bvt convert_byte_update(const byte_update_exprt &expr)
boolbv_widtht bv_width
Definition boolbv.h:116
virtual literalt convert_extractbit(const extractbit_exprt &expr)
unbounded_arrayt unbounded_array
Definition boolbv.h:88
virtual bvt convert_floatbv_op(const ieee_float_op_exprt &)
void print_assignment(std::ostream &out) const override
Print satisfying assignment to out.
Definition boolbv.cpp:575
virtual bvt convert_not(const not_exprt &expr)
virtual bvt convert_extractbits(const extractbits_exprt &expr)
virtual bvt convert_shift(const binary_exprt &expr)
virtual bvt convert_update(const update_exprt &)
virtual bvt convert_unary_minus(const unary_minus_exprt &expr)
virtual bvt convert_div(const div_exprt &expr)
virtual literalt convert_binary_overflow(const binary_overflow_exprt &expr)
virtual bvt convert_array_of(const array_of_exprt &expr)
Flatten arrays constructed from a single element.
virtual bvt convert_floatbv_mod_rem(const binary_exprt &)
virtual bvt convert_saturating_add_sub(const binary_exprt &expr)
virtual bvt convert_overflow_result(const overflow_result_exprt &expr)
virtual bvt convert_bitwise(const exprt &expr)
virtual bvt convert_array_comprehension(const array_comprehension_exprt &)
Definition boolbv.cpp:264
virtual bvt convert_bv_reduction(const unary_exprt &expr)
virtual literalt convert_equality(const equal_exprt &expr)
functionst functions
Definition boolbv.h:120
bvt conversion_failed(const exprt &expr)
Print that the expression of x has failed conversion, then return a vector of x's width.
Definition boolbv.cpp:94
virtual endianness_mapt endianness_map(const typet &type, bool little_endian) const
Definition boolbv.h:108
virtual literalt convert_unary_overflow(const unary_overflow_exprt &expr)
virtual std::size_t boolbv_width(const typet &type) const
Definition boolbv.h:102
virtual bvt convert_case(const exprt &expr)
virtual bvt convert_symbol(const exprt &expr)
Definition boolbv.cpp:299
virtual bvt convert_update_bit(const update_bit_exprt &)
virtual bvt convert_floatbv_typecast(const floatbv_typecast_exprt &expr)
virtual bvt convert_power(const binary_exprt &expr)
virtual bvt convert_bv_typecast(const typecast_exprt &expr)
virtual bvt convert_concatenation(const concatenation_exprt &expr)
virtual bvt convert_struct(const struct_exprt &expr)
virtual bvt convert_bitreverse(const bitreverse_exprt &expr)
virtual bvt convert_replication(const replication_exprt &expr)
literalt convert_rest(const exprt &expr) override
Definition boolbv.cpp:334
std::vector< std::size_t > offset_mapt
Definition boolbv.h:276
virtual bvt convert_abs(const abs_exprt &expr)
boolbv_mapt map
Definition boolbv.h:123
virtual void print_assignment(std::ostream &out) const =0
Print satisfying assignment to out.
void set_to_true(const exprt &)
For a Boolean expression expr, add the constraint 'expr'.
virtual void set_to(const exprt &, bool value)=0
For a Boolean expression expr, add the constraint 'expr' if value is true, otherwise add 'not expr'.
bool empty() const
Definition dstring.h:89
Maps a big-endian offset to a little-endian offset.
Equality.
Definition std_expr.h:1366
Base class for all expressions.
Definition expr.h:56
const source_locationt & find_source_location() const
Get a source_locationt from the expression or from its operands (non-recursively).
Definition expr.cpp:147
bool is_boolean() const
Return whether the expression represents a Boolean.
Definition expr.h:224
bool is_constant() const
Return whether the expression is a constant.
Definition expr.h:212
typet & type()
Return the type of the expression.
Definition expr.h:84
literalt is_NaN(const bvt &)
literalt is_infinity(const bvt &)
literalt is_normal(const bvt &)
Application of (mathematical) function.
const irep_idt & get(const irep_idt &name) const
Definition irep.cpp:44
const irep_idt & id() const
Definition irep.h:388
static var_not unused_var_no()
Definition literal.h:176
void set_frozen(literalt)
virtual void ignoring(const exprt &expr)
literalt convert(const exprt &expr) override
Convert a Boolean expression and return the corresponding literal.
virtual literalt convert_rest(const exprt &expr)
exprt handle(const exprt &expr) override
Generate a handle, which is an expression that has the same value as the argument in any model that i...
Structure type, corresponds to C style structs.
Definition std_types.h:231
const componentst & components() const
Definition std_types.h:147
std::vector< componentt > componentst
Definition std_types.h:140
const irep_idt & get_identifier() const
Definition std_expr.h:160
The type of an expression, extends irept.
Definition type.h:29
const exprt & op() const
Definition std_expr.h:391
auto expr_try_dynamic_cast(TExpr &base) -> typename detail::expr_try_dynamic_cast_return_typet< T, TExpr >::type
Try to cast a reference to a generic exprt to a specific derived class.
Definition expr_cast.h:81
API to expression classes for floating-point arithmetic.
const ieee_float_op_exprt & to_ieee_float_op_expr(const exprt &expr)
Cast an exprt to an ieee_float_op_exprt.
const floatbv_typecast_exprt & to_floatbv_typecast_expr(const exprt &expr)
Cast an exprt to a floatbv_typecast_exprt.
const std::string & id2string(const irep_idt &d)
Definition irep.h:44
std::vector< literalt > bvt
Definition literal.h:201
literalt const_literal(bool value)
Definition literal.h:188
const literal_vector_exprt & to_literal_vector_expr(const exprt &expr)
Cast a generic exprt to a literal_vector_exprt.
Magic numbers used throughout the codebase.
const std::size_t MAX_FLATTENED_ARRAY_SIZE
Definition magic.h:11
const quantifier_exprt & to_quantifier_expr(const exprt &expr)
Cast an exprt to a quantifier_exprt.
const function_application_exprt & to_function_application_expr(const exprt &expr)
Cast an exprt to a function_application_exprt.
exprt simplify_expr(exprt src, const namespacet &ns)
BigInt mp_integer
Definition smt_terms.h:17
#define CHECK_RETURN(CONDITION)
Definition invariant.h:495
#define DATA_INVARIANT(CONDITION, REASON)
This condition should be used to document that assumptions that are made on goto_functions,...
Definition invariant.h:534
#define PRECONDITION(CONDITION)
Definition invariant.h:463
#define INVARIANT_WITH_DIAGNOSTICS(CONDITION, REASON,...)
Same as invariant, with one or more diagnostics attached Diagnostics can be of any type that has a sp...
Definition invariant.h:437
#define INVARIANT(CONDITION, REASON)
This macro uses the wrapper function 'invariant_violated_string'.
Definition invariant.h:423
API to expression classes.
const struct_exprt & to_struct_expr(const exprt &expr)
Cast an exprt to a struct_exprt.
Definition std_expr.h:1900
const array_of_exprt & to_array_of_expr(const exprt &expr)
Cast an exprt to an array_of_exprt.
Definition std_expr.h:1603
const binary_relation_exprt & to_binary_relation_expr(const exprt &expr)
Cast an exprt to a binary_relation_exprt.
Definition std_expr.h:895
const unary_plus_exprt & to_unary_plus_expr(const exprt &expr)
Cast an exprt to a unary_plus_exprt.
Definition std_expr.h:556
const index_exprt & to_index_expr(const exprt &expr)
Cast an exprt to an index_exprt.
Definition std_expr.h:1538
const mod_exprt & to_mod_expr(const exprt &expr)
Cast an exprt to a mod_exprt.
Definition std_expr.h:1277
const mult_exprt & to_mult_expr(const exprt &expr)
Cast an exprt to a mult_exprt.
Definition std_expr.h:1137
const array_comprehension_exprt & to_array_comprehension_expr(const exprt &expr)
Cast an exprt to a array_comprehension_exprt.
Definition std_expr.h:3485
const named_term_exprt & to_named_term_expr(const exprt &expr)
Cast an exprt to a named_term_exprt.
Definition std_expr.h:3667
const array_exprt & to_array_expr(const exprt &expr)
Cast an exprt to an array_exprt.
Definition std_expr.h:1665
const cond_exprt & to_cond_expr(const exprt &expr)
Cast an exprt to a cond_exprt.
Definition std_expr.h:3392
const typecast_exprt & to_typecast_expr(const exprt &expr)
Cast an exprt to a typecast_exprt.
Definition std_expr.h:2107
const div_exprt & to_div_expr(const exprt &expr)
Cast an exprt to a div_exprt.
Definition std_expr.h:1206
const binary_exprt & to_binary_expr(const exprt &expr)
Cast an exprt to a binary_exprt.
Definition std_expr.h:715
const notequal_exprt & to_notequal_expr(const exprt &expr)
Cast an exprt to an notequal_exprt.
Definition std_expr.h:1450
const unary_exprt & to_unary_expr(const exprt &expr)
Cast an exprt to a unary_exprt.
Definition std_expr.h:426
const let_exprt & to_let_expr(const exprt &expr)
Cast an exprt to a let_exprt.
Definition std_expr.h:3333
const abs_exprt & to_abs_expr(const exprt &expr)
Cast an exprt to a abs_exprt.
Definition std_expr.h:466
const if_exprt & to_if_expr(const exprt &expr)
Cast an exprt to an if_exprt.
Definition std_expr.h:2455
const member_exprt & to_member_expr(const exprt &expr)
Cast an exprt to a member_exprt.
Definition std_expr.h:2941
const empty_union_exprt & to_empty_union_expr(const exprt &expr)
Cast an exprt to an empty_union_exprt.
Definition std_expr.h:1860
const complex_imag_exprt & to_complex_imag_expr(const exprt &expr)
Cast an exprt to a complex_imag_exprt.
Definition std_expr.h:2053
const union_exprt & to_union_expr(const exprt &expr)
Cast an exprt to a union_exprt.
Definition std_expr.h:1816
const complex_real_exprt & to_complex_real_expr(const exprt &expr)
Cast an exprt to a complex_real_exprt.
Definition std_expr.h:2010
const constant_exprt & to_constant_expr(const exprt &expr)
Cast an exprt to a constant_exprt.
Definition std_expr.h:3050
const not_exprt & to_not_expr(const exprt &expr)
Cast an exprt to an not_exprt.
Definition std_expr.h:2357
const symbol_exprt & to_symbol_expr(const exprt &expr)
Cast an exprt to a symbol_exprt.
Definition std_expr.h:272
const with_exprt & to_with_expr(const exprt &expr)
Cast an exprt to a with_exprt.
Definition std_expr.h:2538
const complex_exprt & to_complex_expr(const exprt &expr)
Cast an exprt to a complex_exprt.
Definition std_expr.h:1965
const update_exprt & to_update_expr(const exprt &expr)
Cast an exprt to an update_exprt.
Definition std_expr.h:2743
const unary_minus_exprt & to_unary_minus_expr(const exprt &expr)
Cast an exprt to a unary_minus_exprt.
Definition std_expr.h:514
const equal_exprt & to_equal_expr(const exprt &expr)
Cast an exprt to an equal_exprt.
Definition std_expr.h:1407
const sign_exprt & to_sign_expr(const exprt &expr)
Cast an exprt to a sign_exprt.
Definition std_expr.h:621
const string_constantt & to_string_constant(const exprt &expr)
dstringt irep_idt