cprover
boolbv.cpp
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1 /*******************************************************************\
2 
3 Module:
4 
5 Author: Daniel Kroening, kroening@kroening.com
6 
7 \*******************************************************************/
8 
9 #include "boolbv.h"
10 
11 #include <algorithm>
12 
13 #include <util/arith_tools.h>
14 #include <util/bitvector_expr.h>
15 #include <util/bitvector_types.h>
16 #include <util/byte_operators.h>
17 #include <util/config.h>
18 #include <util/floatbv_expr.h>
19 #include <util/magic.h>
20 #include <util/mp_arith.h>
21 #include <util/replace_expr.h>
22 #include <util/simplify_expr.h>
23 #include <util/std_expr.h>
24 #include <util/string2int.h>
25 #include <util/string_constant.h>
26 
28 
30 {
31  const bool little_endian =
33  return endianness_map(type, little_endian);
34 }
35 
39 const bvt &
40 boolbvt::convert_bv(const exprt &expr, optionalt<std::size_t> expected_width)
41 {
42  // check cache first
43  std::pair<bv_cachet::iterator, bool> cache_result=
44  bv_cache.insert(std::make_pair(expr, bvt()));
45 
46  // get a reference to the cache entry
47  auto &cache_entry = cache_result.first->second;
48 
49  if(!cache_result.second)
50  {
51  // Found in cache
52  return cache_entry;
53  }
54 
55  // Iterators into hash_maps do not remain valid when inserting
56  // more elements recursively. C++11 ยง23.2.5/13
57  // However, the _reference_ to the entry does!
58  cache_entry = convert_bitvector(expr);
59 
61  !expected_width || cache_entry.size() == *expected_width,
62  "bitvector width shall match the indicated expected width",
63  expr.find_source_location(),
65 
66  // check
67  for(const auto &literal : cache_entry)
68  {
69  if(freeze_all && !literal.is_constant())
70  prop.set_frozen(literal);
71 
73  literal.var_no() != literalt::unused_var_no(),
74  "variable number must be different from the unused variable number",
75  expr.find_source_location(),
77  }
78 
79  return cache_entry;
80 }
81 
85 {
86  ignoring(expr);
87 
88  // try to make it free bits
89  std::size_t width=boolbv_width(expr.type());
90  return prop.new_variables(width);
91 }
92 
99 {
100  if(expr.type().id()==ID_bool)
101  return {convert(expr)};
102 
103  if(expr.id()==ID_index)
104  return convert_index(to_index_expr(expr));
105  else if(expr.id()==ID_constraint_select_one)
106  return convert_constraint_select_one(expr);
107  else if(expr.id()==ID_member)
108  return convert_member(to_member_expr(expr));
109  else if(expr.id()==ID_with)
110  return convert_with(to_with_expr(expr));
111  else if(expr.id()==ID_update)
112  return convert_update(to_update_expr(expr));
113  else if(expr.id()==ID_case)
114  return convert_case(expr);
115  else if(expr.id()==ID_cond)
116  return convert_cond(to_cond_expr(expr));
117  else if(expr.id()==ID_if)
118  return convert_if(to_if_expr(expr));
119  else if(expr.id()==ID_constant)
120  return convert_constant(to_constant_expr(expr));
121  else if(expr.id()==ID_typecast)
123  else if(expr.id()==ID_symbol)
124  return convert_symbol(to_symbol_expr(expr));
125  else if(expr.id()==ID_bv_literals)
126  return convert_bv_literals(expr);
127  else if(expr.id()==ID_plus || expr.id()==ID_minus ||
128  expr.id()=="no-overflow-plus" ||
129  expr.id()=="no-overflow-minus")
130  return convert_add_sub(expr);
131  else if(expr.id() == ID_mult)
132  return convert_mult(to_mult_expr(expr));
133  else if(expr.id()==ID_div)
134  return convert_div(to_div_expr(expr));
135  else if(expr.id()==ID_mod)
136  return convert_mod(to_mod_expr(expr));
137  else if(expr.id()==ID_shl || expr.id()==ID_ashr || expr.id()==ID_lshr ||
138  expr.id()==ID_rol || expr.id()==ID_ror)
139  return convert_shift(to_shift_expr(expr));
140  else if(
141  expr.id() == ID_floatbv_plus || expr.id() == ID_floatbv_minus ||
142  expr.id() == ID_floatbv_mult || expr.id() == ID_floatbv_div)
143  {
145  }
146  else if(expr.id() == ID_floatbv_mod)
148  else if(expr.id() == ID_floatbv_rem)
150  else if(expr.id()==ID_floatbv_typecast)
152  else if(expr.id()==ID_concatenation)
154  else if(expr.id()==ID_replication)
156  else if(expr.id()==ID_extractbits)
158  else if(expr.id()==ID_bitnot || expr.id()==ID_bitand ||
159  expr.id()==ID_bitor || expr.id()==ID_bitxor ||
160  expr.id()==ID_bitxnor || expr.id()==ID_bitnor ||
161  expr.id()==ID_bitnand)
162  return convert_bitwise(expr);
163  else if(expr.id() == ID_unary_minus)
165  else if(expr.id()==ID_unary_plus)
166  {
167  return convert_bitvector(to_unary_plus_expr(expr).op());
168  }
169  else if(expr.id()==ID_abs)
170  return convert_abs(to_abs_expr(expr));
171  else if(expr.id() == ID_bswap)
172  return convert_bswap(to_bswap_expr(expr));
173  else if(expr.id()==ID_byte_extract_little_endian ||
174  expr.id()==ID_byte_extract_big_endian)
176  else if(expr.id()==ID_byte_update_little_endian ||
177  expr.id()==ID_byte_update_big_endian)
179  else if(expr.id()==ID_nondet_symbol ||
180  expr.id()=="quant_symbol")
181  return convert_symbol(expr);
182  else if(expr.id()==ID_struct)
183  return convert_struct(to_struct_expr(expr));
184  else if(expr.id()==ID_union)
185  return convert_union(to_union_expr(expr));
186  else if(expr.id() == ID_empty_union)
188  else if(expr.id()==ID_string_constant)
189  return convert_bitvector(
191  else if(expr.id()==ID_array)
192  return convert_array(expr);
193  else if(expr.id()==ID_vector)
194  return convert_vector(to_vector_expr(expr));
195  else if(expr.id()==ID_complex)
196  return convert_complex(to_complex_expr(expr));
197  else if(expr.id()==ID_complex_real)
199  else if(expr.id()==ID_complex_imag)
201  else if(expr.id() == ID_array_comprehension)
203  else if(expr.id()==ID_array_of)
204  return convert_array_of(to_array_of_expr(expr));
205  else if(expr.id()==ID_let)
206  return convert_let(to_let_expr(expr));
207  else if(expr.id()==ID_function_application)
210  else if(expr.id()==ID_reduction_or || expr.id()==ID_reduction_and ||
211  expr.id()==ID_reduction_nor || expr.id()==ID_reduction_nand ||
212  expr.id()==ID_reduction_xor || expr.id()==ID_reduction_xnor)
213  return convert_bv_reduction(to_unary_expr(expr));
214  else if(expr.id()==ID_not)
215  return convert_not(to_not_expr(expr));
216  else if(expr.id()==ID_power)
217  return convert_power(to_binary_expr(expr));
218  else if(expr.id() == ID_popcount)
219  return convert_bv(simplify_expr(to_popcount_expr(expr).lower(), ns));
220  else if(expr.id() == ID_count_leading_zeros)
221  {
222  return convert_bv(
224  }
225  else if(expr.id() == ID_count_trailing_zeros)
226  {
227  return convert_bv(
229  }
230  else if(expr.id() == ID_bitreverse)
232 
233  return conversion_failed(expr);
234 }
235 
237 {
238  std::size_t width=boolbv_width(expr.type());
239 
240  if(width==0)
241  return conversion_failed(expr);
242 
243  const exprt &array_size = expr.type().size();
244 
245  const auto size = numeric_cast<mp_integer>(array_size);
246 
247  if(!size.has_value())
248  return conversion_failed(expr);
249 
250  typet counter_type = expr.arg().type();
251 
252  bvt bv;
253  bv.resize(width);
254 
255  for(mp_integer i = 0; i < *size; ++i)
256  {
257  exprt counter=from_integer(i, counter_type);
258 
259  exprt body = expr.body();
260  replace_expr(expr.arg(), counter, body);
261 
262  const bvt &tmp = convert_bv(body);
263 
264  INVARIANT(
265  *size * tmp.size() == width,
266  "total bitvector width shall equal the number of operands times the size "
267  "per operand");
268 
269  std::size_t offset = numeric_cast_v<std::size_t>(i * tmp.size());
270 
271  for(std::size_t j=0; j<tmp.size(); j++)
272  bv[offset+j]=tmp[j];
273  }
274 
275  return bv;
276 }
277 
279 {
280  std::size_t width=boolbv_width(expr.type());
281 
282  if(width==0)
283  return conversion_failed(expr);
284 
285  bvt bv;
286  bv.resize(width);
287 
288  const irept::subt &bv_sub=expr.find(ID_bv).get_sub();
289 
290  if(bv_sub.size()!=width)
291  throw "bv_literals with wrong size";
292 
293  for(std::size_t i=0; i<width; i++)
294  bv[i].set(unsafe_string2unsigned(id2string(bv_sub[i].id())));
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.type().id() == ID_bool);
337 
338  if(expr.id()==ID_typecast)
339  return convert_typecast(to_typecast_expr(expr));
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  {
378  bvt bv=convert_index(to_index_expr(expr));
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  expr.id() == ID_overflow_plus || expr.id() == ID_overflow_mult ||
419  expr.id() == ID_overflow_minus || expr.id() == ID_overflow_shl ||
420  expr.id() == ID_overflow_unary_minus)
421  {
422  return convert_overflow(expr);
423  }
424  else if(expr.id()==ID_isnan)
425  {
426  const auto &op = to_unary_expr(expr).op();
427  const bvt &bv = convert_bv(op);
428 
429  if(op.type().id() == ID_floatbv)
430  {
431  float_utilst float_utils(prop, to_floatbv_type(op.type()));
432  return float_utils.is_NaN(bv);
433  }
434  else if(op.type().id() == ID_fixedbv)
435  return const_literal(false);
436  }
437  else if(expr.id()==ID_isfinite)
438  {
439  const auto &op = to_unary_expr(expr).op();
440  const bvt &bv = convert_bv(op);
441 
442  if(op.type().id() == ID_floatbv)
443  {
444  float_utilst float_utils(prop, to_floatbv_type(op.type()));
445  return prop.land(
446  !float_utils.is_infinity(bv),
447  !float_utils.is_NaN(bv));
448  }
449  else if(op.id() == ID_fixedbv)
450  return const_literal(true);
451  }
452  else if(expr.id()==ID_isinf)
453  {
454  const auto &op = to_unary_expr(expr).op();
455  const bvt &bv = convert_bv(op);
456 
457  if(op.type().id() == ID_floatbv)
458  {
459  float_utilst float_utils(prop, to_floatbv_type(op.type()));
460  return float_utils.is_infinity(bv);
461  }
462  else if(op.type().id() == ID_fixedbv)
463  return const_literal(false);
464  }
465  else if(expr.id()==ID_isnormal)
466  {
467  const auto &op = to_unary_expr(expr).op();
468 
469  if(op.type().id() == ID_floatbv)
470  {
471  const bvt &bv = convert_bv(op);
472  float_utilst float_utils(prop, to_floatbv_type(op.type()));
473  return float_utils.is_normal(bv);
474  }
475  else if(op.type().id() == ID_fixedbv)
476  return const_literal(true);
477  }
478  else if(expr.id() == ID_function_application)
479  {
481  return prop.new_variable();
482  }
483 
484  return SUB::convert_rest(expr);
485 }
486 
488 {
490  return true;
491 
492  const typet &type = expr.lhs().type();
493 
494  if(
495  expr.lhs().id() == ID_symbol && type == expr.rhs().type() &&
496  type.id() != ID_bool)
497  {
498  // see if it is an unbounded array
499  if(is_unbounded_array(type))
500  return true;
501 
502  const bvt &bv1=convert_bv(expr.rhs());
503 
504  const irep_idt &identifier=
506 
507  map.set_literals(identifier, type, bv1);
508 
509  if(freeze_all)
510  set_frozen(bv1);
511 
512  return false;
513  }
514 
515  return true;
516 }
517 
518 void boolbvt::set_to(const exprt &expr, bool value)
519 {
520  PRECONDITION(expr.type().id() == ID_bool);
521 
522  const auto equal_expr = expr_try_dynamic_cast<equal_exprt>(expr);
523  if(value && equal_expr && !boolbv_set_equality_to_true(*equal_expr))
524  return;
525  SUB::set_to(expr, value);
526 }
527 
528 exprt boolbvt::make_bv_expr(const typet &type, const bvt &bv)
529 {
530  exprt dest(ID_bv_literals, type);
531  irept::subt &bv_sub=dest.add(ID_bv).get_sub();
532  bv_sub.resize(bv.size());
533 
534  for(std::size_t i=0; i<bv.size(); i++)
535  bv_sub[i].id(std::to_string(bv[i].get()));
536  return dest;
537 }
538 
540 {
541  const std::size_t width = boolbv_width(type);
542  PRECONDITION(width != 0);
543  bvt bv = prop.new_variables(width);
544  return make_bv_expr(type, bv);
545 }
546 
547 bool boolbvt::is_unbounded_array(const typet &type) const
548 {
549  if(type.id()!=ID_array)
550  return false;
551 
553  return true;
554 
555  const std::size_t size = boolbv_width(type);
556  if(size == 0)
557  return true;
558 
560  if(size > MAX_FLATTENED_ARRAY_SIZE)
561  return true;
562 
563  return false;
564 }
565 
567 {
568  // to ensure freshness of the new identifiers
569  scope_counter++;
570 
572  result.reserve(binding.variables().size());
573 
574  for(const auto &binding : binding.variables())
575  {
576  const auto &old_identifier = binding.get_identifier();
577 
578  // produce a new identifier
579  const irep_idt new_identifier =
580  "boolbvt::scope::" + std::to_string(scope_counter) +
581  "::" + id2string(old_identifier);
582 
583  result.emplace_back(new_identifier, binding.type());
584  }
585 
586  return result;
587 }
588 
589 void boolbvt::print_assignment(std::ostream &out) const
590 {
592  map.show(out);
593 }
594 
596 {
597  const struct_typet::componentst &components = src.components();
598  offset_mapt dest;
599  dest.reserve(components.size());
600  std::size_t offset = 0;
601  for(const auto &comp : components)
602  {
603  dest.push_back(offset);
604  offset += boolbv_width(comp.type());
605  }
606  return dest;
607 }
constant_exprt from_integer(const mp_integer &int_value, const typet &type)
Definition: arith_tools.cpp:99
API to expression classes for bitvectors.
const shift_exprt & to_shift_expr(const exprt &expr)
Cast an exprt to a shift_exprt.
const extractbit_exprt & to_extractbit_expr(const exprt &expr)
Cast an exprt to an extractbit_exprt.
const extractbits_exprt & to_extractbits_expr(const exprt &expr)
Cast an exprt to an extractbits_exprt.
const bitreverse_exprt & to_bitreverse_expr(const exprt &expr)
Cast an exprt to a bitreverse_exprt.
const count_trailing_zeros_exprt & to_count_trailing_zeros_expr(const exprt &expr)
Cast an exprt to a count_trailing_zeros_exprt.
const replication_exprt & to_replication_expr(const exprt &expr)
Cast an exprt to a replication_exprt.
const concatenation_exprt & to_concatenation_expr(const exprt &expr)
Cast an exprt to a concatenation_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 popcount_exprt & to_popcount_expr(const exprt &expr)
Cast an exprt to a popcount_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:3182
const exprt & body() const
Definition: std_expr.h:3220
const array_typet & type() const
Definition: std_expr.h:3196
const symbol_exprt & arg() const
Definition: std_expr.h:3206
const exprt & size() const
Definition: std_types.h:790
const namespacet & ns
Definition: arrays.h:56
exprt & lhs()
Definition: std_expr.h:580
exprt & rhs()
Definition: std_expr.h:590
A base class for variable bindings (quantifiers, let, lambda)
Definition: std_expr.h:2900
variablest & variables()
Definition: std_expr.h:2921
std::vector< symbol_exprt > variablest
Definition: std_expr.h:2902
void set_literals(const irep_idt &identifier, const typet &type, const bvt &literals)
Definition: boolbv_map.cpp:75
void show(std::ostream &out) const
Definition: boolbv_map.cpp:35
const bvt & get_literals(const irep_idt &identifier, const typet &type, std::size_t width)
Definition: boolbv_map.cpp:41
virtual bvt convert_bv_literals(const exprt &expr)
Definition: boolbv.cpp:278
virtual bvt convert_with(const with_exprt &expr)
Definition: boolbv_with.cpp:16
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:132
virtual literalt convert_onehot(const unary_exprt &expr)
virtual bvt convert_index(const exprt &array, const mp_integer &index)
index operator with constant index
std::size_t scope_counter
Definition: boolbv.h:281
virtual bvt convert_constraint_select_one(const exprt &expr)
virtual exprt make_free_bv_expr(const typet &type)
Definition: boolbv.cpp:539
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 &)
Definition: boolbv_let.cpp:15
virtual bvt convert_byte_extract(const byte_extract_exprt &expr)
offset_mapt build_offset_map(const struct_typet &src)
Definition: boolbv.cpp:595
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:98
binding_exprt::variablest fresh_binding(const binding_exprt &)
create new, unique variables for the given binding
Definition: boolbv.cpp:566
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:547
virtual const bvt & convert_bv(const exprt &expr, const optionalt< std::size_t > expected_width=nullopt)
Convert expression to vector of literalts, using an internal cache to speed up conversion if availabl...
Definition: boolbv.cpp:40
virtual bvt convert_mod(const mod_exprt &expr)
Definition: boolbv_mod.cpp:12
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:487
virtual bvt convert_mult(const mult_exprt &expr)
Definition: boolbv_mult.cpp:13
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 &)
Definition: boolbv_cond.cpp:13
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:518
virtual bvt convert_byte_update(const byte_update_exprt &expr)
virtual literalt convert_extractbit(const extractbit_exprt &expr)
unbounded_arrayt unbounded_array
Definition: boolbv.h:85
exprt get(const exprt &expr) const override
Return expr with variables replaced by values from satisfying assignment if available.
Definition: boolbv_get.cpp:20
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:589
virtual bvt convert_not(const not_exprt &expr)
Definition: boolbv_not.cpp:13
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)
Definition: boolbv_div.cpp:13
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_bitwise(const exprt &expr)
virtual bvt convert_array_comprehension(const array_comprehension_exprt &)
Definition: boolbv.cpp:236
virtual bvt convert_bv_reduction(const unary_exprt &expr)
virtual literalt convert_equality(const equal_exprt &expr)
functionst functions
Definition: boolbv.h:117
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:84
virtual bvt convert_vector(const vector_exprt &expr)
virtual endianness_mapt endianness_map(const typet &type, bool little_endian) const
Definition: boolbv.h:105
virtual std::size_t boolbv_width(const typet &type) const
Definition: boolbv.h:99
virtual bvt convert_case(const exprt &expr)
Definition: boolbv_case.cpp:13
virtual exprt make_bv_expr(const typet &type, const bvt &bv)
Definition: boolbv.cpp:528
virtual bvt convert_symbol(const exprt &expr)
Definition: boolbv.cpp:299
virtual literalt convert_overflow(const exprt &expr)
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:274
virtual bvt convert_abs(const abs_exprt &expr)
Definition: boolbv_abs.cpp:17
boolbv_mapt map
Definition: boolbv.h:120
struct configt::ansi_ct ansi_c
dstringt has one field, an unsigned integer no which is an index into a static table of strings.
Definition: dstring.h:37
bool empty() const
Definition: dstring.h:88
Maps a big-endian offset to a little-endian offset.
Equality.
Definition: std_expr.h:1225
Base class for all expressions.
Definition: expr.h:54
const source_locationt & find_source_location() const
Get a source_locationt from the expression or from its operands (non-recursively).
Definition: expr.cpp:165
typet & type()
Return the type of the expression.
Definition: expr.h:82
literalt is_NaN(const bvt &)
literalt is_infinity(const bvt &)
literalt is_normal(const bvt &)
Application of (mathematical) function.
void record(const function_application_exprt &function_application)
Definition: functions.cpp:15
subt & get_sub()
Definition: irep.h:456
const irept & find(const irep_idt &name) const
Definition: irep.cpp:106
const irep_idt & get(const irep_idt &name) const
Definition: irep.cpp:45
const irep_idt & id() const
Definition: irep.h:396
irept & add(const irep_idt &name)
Definition: irep.cpp:116
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)
void set_to(const exprt &expr, bool value) override
For a Boolean expression expr, add the constraint 'current_context => expr' if value is true,...
void print_assignment(std::ostream &out) const override
Print satisfying assignment to out.
virtual literalt land(literalt a, literalt b)=0
virtual void set_frozen(literalt)
Definition: prop.h:112
virtual bvt new_variables(std::size_t width)
generates a bitvector of given width with new variables
Definition: prop.cpp:20
virtual literalt new_variable()=0
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:109
The type of an expression, extends irept.
Definition: type.h:29
const exprt & op() const
Definition: std_expr.h:293
configt config
Definition: config.cpp:25
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.
Definition: floatbv_expr.h:425
const floatbv_typecast_exprt & to_floatbv_typecast_expr(const exprt &expr)
Cast an exprt to a floatbv_typecast_exprt.
Definition: floatbv_expr.h:68
const std::string & id2string(const irep_idt &d)
Definition: irep.h:47
std::vector< literalt > bvt
Definition: literal.h:201
literalt const_literal(bool value)
Definition: literal.h:188
Magic numbers used throughout the codebase.
const std::size_t MAX_FLATTENED_ARRAY_SIZE
Definition: magic.h:11
const function_application_exprt & to_function_application_expr(const exprt &expr)
Cast an exprt to a function_application_exprt.
const quantifier_exprt & to_quantifier_expr(const exprt &expr)
Cast an exprt to a quantifier_exprt.
nonstd::optional< T > optionalt
Definition: optional.h:35
bool replace_expr(const exprt &what, const exprt &by, exprt &dest)
exprt simplify_expr(exprt src, const namespacet &ns)
BigInt mp_integer
Definition: smt_terms.h:12
#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:510
#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
API to expression classes.
const notequal_exprt & to_notequal_expr(const exprt &expr)
Cast an exprt to an notequal_exprt.
Definition: std_expr.h:1308
const if_exprt & to_if_expr(const exprt &expr)
Cast an exprt to an if_exprt.
Definition: std_expr.h:2291
const update_exprt & to_update_expr(const exprt &expr)
Cast an exprt to an update_exprt.
Definition: std_expr.h:2561
const empty_union_exprt & to_empty_union_expr(const exprt &expr)
Cast an exprt to an empty_union_exprt.
Definition: std_expr.h:1703
const let_exprt & to_let_expr(const exprt &expr)
Cast an exprt to a let_exprt.
Definition: std_expr.h:3097
const unary_plus_exprt & to_unary_plus_expr(const exprt &expr)
Cast an exprt to a unary_plus_exprt.
Definition: std_expr.h:464
const constant_exprt & to_constant_expr(const exprt &expr)
Cast an exprt to a constant_exprt.
Definition: std_expr.h:2840
const symbol_exprt & to_symbol_expr(const exprt &expr)
Cast an exprt to a symbol_exprt.
Definition: std_expr.h:189
const mod_exprt & to_mod_expr(const exprt &expr)
Cast an exprt to a mod_exprt.
Definition: std_expr.h:1160
const array_exprt & to_array_expr(const exprt &expr)
Cast an exprt to an array_exprt.
Definition: std_expr.h:1506
const array_comprehension_exprt & to_array_comprehension_expr(const exprt &expr)
Cast an exprt to a array_comprehension_exprt.
Definition: std_expr.h:3249
const typecast_exprt & to_typecast_expr(const exprt &expr)
Cast an exprt to a typecast_exprt.
Definition: std_expr.h:1954
const complex_real_exprt & to_complex_real_expr(const exprt &expr)
Cast an exprt to a complex_real_exprt.
Definition: std_expr.h:1855
const not_exprt & to_not_expr(const exprt &expr)
Cast an exprt to an not_exprt.
Definition: std_expr.h:2206
const union_exprt & to_union_expr(const exprt &expr)
Cast an exprt to a union_exprt.
Definition: std_expr.h:1657
const unary_minus_exprt & to_unary_minus_expr(const exprt &expr)
Cast an exprt to a unary_minus_exprt.
Definition: std_expr.h:420
const div_exprt & to_div_expr(const exprt &expr)
Cast an exprt to a div_exprt.
Definition: std_expr.h:1113
const vector_exprt & to_vector_expr(const exprt &expr)
Cast an exprt to an vector_exprt.
Definition: std_expr.h:1595
const with_exprt & to_with_expr(const exprt &expr)
Cast an exprt to a with_exprt.
Definition: std_expr.h:2374
const struct_exprt & to_struct_expr(const exprt &expr)
Cast an exprt to a struct_exprt.
Definition: std_expr.h:1745
const binary_exprt & to_binary_expr(const exprt &expr)
Cast an exprt to a binary_exprt.
Definition: std_expr.h:627
const array_of_exprt & to_array_of_expr(const exprt &expr)
Cast an exprt to an array_of_exprt.
Definition: std_expr.h:1456
const equal_exprt & to_equal_expr(const exprt &expr)
Cast an exprt to an equal_exprt.
Definition: std_expr.h:1265
const complex_exprt & to_complex_expr(const exprt &expr)
Cast an exprt to a complex_exprt.
Definition: std_expr.h:1810
const member_exprt & to_member_expr(const exprt &expr)
Cast an exprt to a member_exprt.
Definition: std_expr.h:2751
const unary_exprt & to_unary_expr(const exprt &expr)
Cast an exprt to a unary_exprt.
Definition: std_expr.h:328
const complex_imag_exprt & to_complex_imag_expr(const exprt &expr)
Cast an exprt to a complex_imag_exprt.
Definition: std_expr.h:1900
const sign_exprt & to_sign_expr(const exprt &expr)
Cast an exprt to a sign_exprt.
Definition: std_expr.h:531
const abs_exprt & to_abs_expr(const exprt &expr)
Cast an exprt to a abs_exprt.
Definition: std_expr.h:370
const binary_relation_exprt & to_binary_relation_expr(const exprt &expr)
Cast an exprt to a binary_relation_exprt.
Definition: std_expr.h:807
const index_exprt & to_index_expr(const exprt &expr)
Cast an exprt to an index_exprt.
Definition: std_expr.h:1391
const mult_exprt & to_mult_expr(const exprt &expr)
Cast an exprt to a mult_exprt.
Definition: std_expr.h:1044
const cond_exprt & to_cond_expr(const exprt &expr)
Cast an exprt to a cond_exprt.
Definition: std_expr.h:3156
unsigned unsafe_string2unsigned(const std::string &str, int base)
Definition: string2int.cpp:35
const string_constantt & to_string_constant(const exprt &expr)
std::string to_string(const string_not_contains_constraintt &expr)
Used for debug printing.
endiannesst endianness
Definition: config.h:177