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_string_constant)
187  return convert_bitvector(
189  else if(expr.id()==ID_array)
190  return convert_array(expr);
191  else if(expr.id()==ID_vector)
192  return convert_vector(to_vector_expr(expr));
193  else if(expr.id()==ID_complex)
194  return convert_complex(to_complex_expr(expr));
195  else if(expr.id()==ID_complex_real)
197  else if(expr.id()==ID_complex_imag)
199  else if(expr.id() == ID_array_comprehension)
201  else if(expr.id()==ID_array_of)
202  return convert_array_of(to_array_of_expr(expr));
203  else if(expr.id()==ID_let)
204  return convert_let(to_let_expr(expr));
205  else if(expr.id()==ID_function_application)
208  else if(expr.id()==ID_reduction_or || expr.id()==ID_reduction_and ||
209  expr.id()==ID_reduction_nor || expr.id()==ID_reduction_nand ||
210  expr.id()==ID_reduction_xor || expr.id()==ID_reduction_xnor)
211  return convert_bv_reduction(to_unary_expr(expr));
212  else if(expr.id()==ID_not)
213  return convert_not(to_not_expr(expr));
214  else if(expr.id()==ID_power)
215  return convert_power(to_binary_expr(expr));
216  else if(expr.id() == ID_popcount)
217  return convert_bv(simplify_expr(to_popcount_expr(expr).lower(), ns));
218  else if(expr.id() == ID_count_leading_zeros)
219  {
220  return convert_bv(
222  }
223  else if(expr.id() == ID_count_trailing_zeros)
224  {
225  return convert_bv(
227  }
228 
229  return conversion_failed(expr);
230 }
231 
233 {
234  std::size_t width=boolbv_width(expr.type());
235 
236  if(width==0)
237  return conversion_failed(expr);
238 
239  const exprt &array_size = expr.type().size();
240 
241  const auto size = numeric_cast<mp_integer>(array_size);
242 
243  if(!size.has_value())
244  return conversion_failed(expr);
245 
246  typet counter_type = expr.arg().type();
247 
248  bvt bv;
249  bv.resize(width);
250 
251  for(mp_integer i = 0; i < *size; ++i)
252  {
253  exprt counter=from_integer(i, counter_type);
254 
255  exprt body = expr.body();
256  replace_expr(expr.arg(), counter, body);
257 
258  const bvt &tmp = convert_bv(body);
259 
260  INVARIANT(
261  *size * tmp.size() == width,
262  "total bitvector width shall equal the number of operands times the size "
263  "per operand");
264 
265  std::size_t offset = numeric_cast_v<std::size_t>(i * tmp.size());
266 
267  for(std::size_t j=0; j<tmp.size(); j++)
268  bv[offset+j]=tmp[j];
269  }
270 
271  return bv;
272 }
273 
275 {
276  std::size_t width=boolbv_width(expr.type());
277 
278  if(width==0)
279  return conversion_failed(expr);
280 
281  bvt bv;
282  bv.resize(width);
283 
284  const irept::subt &bv_sub=expr.find(ID_bv).get_sub();
285 
286  if(bv_sub.size()!=width)
287  throw "bv_literals with wrong size";
288 
289  for(std::size_t i=0; i<width; i++)
290  bv[i].set(unsafe_string2unsigned(id2string(bv_sub[i].id())));
291 
292  return bv;
293 }
294 
296 {
297  const typet &type=expr.type();
298  std::size_t width=boolbv_width(type);
299 
300  const irep_idt &identifier = expr.get(ID_identifier);
301  CHECK_RETURN(!identifier.empty());
302 
303  bvt bv = map.get_literals(identifier, type, width);
304 
306  std::all_of(
307  bv.begin(),
308  bv.end(),
309  [this](const literalt &l) {
310  return l.var_no() < prop.no_variables() || l.is_constant();
311  }),
312  "variable number of non-constant literals should be within bounds",
313  id2string(identifier));
314 
315  return bv;
316 }
317 
318 
320  const function_application_exprt &expr)
321 {
322  // record
323  functions.record(expr);
324 
325  // make it free bits
326  return prop.new_variables(boolbv_width(expr.type()));
327 }
328 
329 
331 {
332  PRECONDITION(expr.type().id() == ID_bool);
333 
334  if(expr.id()==ID_typecast)
335  return convert_typecast(to_typecast_expr(expr));
336  else if(expr.id()==ID_equal)
337  return convert_equality(to_equal_expr(expr));
338  else if(expr.id()==ID_verilog_case_equality ||
339  expr.id()==ID_verilog_case_inequality)
341  else if(expr.id()==ID_notequal)
342  {
343  const auto &notequal_expr = to_notequal_expr(expr);
344  return !convert_equality(
345  equal_exprt(notequal_expr.lhs(), notequal_expr.rhs()));
346  }
347  else if(expr.id()==ID_ieee_float_equal ||
348  expr.id()==ID_ieee_float_notequal)
349  {
351  }
352  else if(expr.id()==ID_le || expr.id()==ID_ge ||
353  expr.id()==ID_lt || expr.id()==ID_gt)
354  {
356  }
357  else if(expr.id()==ID_extractbit)
359  else if(expr.id()==ID_forall)
361  else if(expr.id()==ID_exists)
363  else if(expr.id()==ID_let)
364  {
365  bvt bv=convert_let(to_let_expr(expr));
366 
367  DATA_INVARIANT(bv.size()==1,
368  "convert_let must return 1-bit vector for boolean let");
369 
370  return bv[0];
371  }
372  else if(expr.id()==ID_index)
373  {
374  bvt bv=convert_index(to_index_expr(expr));
375  CHECK_RETURN(bv.size() == 1);
376  return bv[0];
377  }
378  else if(expr.id()==ID_member)
379  {
381  CHECK_RETURN(bv.size() == 1);
382  return bv[0];
383  }
384  else if(expr.id()==ID_case)
385  {
386  bvt bv=convert_case(expr);
387  CHECK_RETURN(bv.size() == 1);
388  return bv[0];
389  }
390  else if(expr.id()==ID_cond)
391  {
392  bvt bv = convert_cond(to_cond_expr(expr));
393  CHECK_RETURN(bv.size() == 1);
394  return bv[0];
395  }
396  else if(expr.id()==ID_sign)
397  {
398  const auto &op = to_sign_expr(expr).op();
399  const bvt &bv = convert_bv(op);
400  CHECK_RETURN(!bv.empty());
401  const irep_idt type_id = op.type().id();
402  if(type_id == ID_signedbv || type_id == ID_fixedbv || type_id == ID_floatbv)
403  return bv[bv.size()-1];
404  if(type_id == ID_unsignedbv)
405  return const_literal(false);
406  }
407  else if(expr.id()==ID_reduction_or || expr.id()==ID_reduction_and ||
408  expr.id()==ID_reduction_nor || expr.id()==ID_reduction_nand ||
409  expr.id()==ID_reduction_xor || expr.id()==ID_reduction_xnor)
410  return convert_reduction(to_unary_expr(expr));
411  else if(expr.id()==ID_onehot || expr.id()==ID_onehot0)
412  return convert_onehot(to_unary_expr(expr));
413  else if(
414  expr.id() == ID_overflow_plus || expr.id() == ID_overflow_mult ||
415  expr.id() == ID_overflow_minus || expr.id() == ID_overflow_shl ||
416  expr.id() == ID_overflow_unary_minus)
417  {
418  return convert_overflow(expr);
419  }
420  else if(expr.id()==ID_isnan)
421  {
422  const auto &op = to_unary_expr(expr).op();
423  const bvt &bv = convert_bv(op);
424 
425  if(op.type().id() == ID_floatbv)
426  {
427  float_utilst float_utils(prop, to_floatbv_type(op.type()));
428  return float_utils.is_NaN(bv);
429  }
430  else if(op.type().id() == ID_fixedbv)
431  return const_literal(false);
432  }
433  else if(expr.id()==ID_isfinite)
434  {
435  const auto &op = to_unary_expr(expr).op();
436  const bvt &bv = convert_bv(op);
437 
438  if(op.type().id() == ID_floatbv)
439  {
440  float_utilst float_utils(prop, to_floatbv_type(op.type()));
441  return prop.land(
442  !float_utils.is_infinity(bv),
443  !float_utils.is_NaN(bv));
444  }
445  else if(op.id() == ID_fixedbv)
446  return const_literal(true);
447  }
448  else if(expr.id()==ID_isinf)
449  {
450  const auto &op = to_unary_expr(expr).op();
451  const bvt &bv = convert_bv(op);
452 
453  if(op.type().id() == ID_floatbv)
454  {
455  float_utilst float_utils(prop, to_floatbv_type(op.type()));
456  return float_utils.is_infinity(bv);
457  }
458  else if(op.type().id() == ID_fixedbv)
459  return const_literal(false);
460  }
461  else if(expr.id()==ID_isnormal)
462  {
463  const auto &op = to_unary_expr(expr).op();
464 
465  if(op.type().id() == ID_floatbv)
466  {
467  const bvt &bv = convert_bv(op);
468  float_utilst float_utils(prop, to_floatbv_type(op.type()));
469  return float_utils.is_normal(bv);
470  }
471  else if(op.type().id() == ID_fixedbv)
472  return const_literal(true);
473  }
474  else if(expr.id() == ID_function_application)
475  {
477  return prop.new_variable();
478  }
479 
480  return SUB::convert_rest(expr);
481 }
482 
484 {
486  return true;
487 
488  const typet &type = expr.lhs().type();
489 
490  if(
491  expr.lhs().id() == ID_symbol && type == expr.rhs().type() &&
492  type.id() != ID_bool)
493  {
494  // see if it is an unbounded array
495  if(is_unbounded_array(type))
496  return true;
497 
498  const bvt &bv1=convert_bv(expr.rhs());
499 
500  const irep_idt &identifier=
502 
503  map.set_literals(identifier, type, bv1);
504 
505  if(freeze_all)
506  set_frozen(bv1);
507 
508  return false;
509  }
510 
511  return true;
512 }
513 
514 void boolbvt::set_to(const exprt &expr, bool value)
515 {
516  PRECONDITION(expr.type().id() == ID_bool);
517 
518  const auto equal_expr = expr_try_dynamic_cast<equal_exprt>(expr);
519  if(value && equal_expr && !boolbv_set_equality_to_true(*equal_expr))
520  return;
521  SUB::set_to(expr, value);
522 }
523 
524 exprt boolbvt::make_bv_expr(const typet &type, const bvt &bv)
525 {
526  exprt dest(ID_bv_literals, type);
527  irept::subt &bv_sub=dest.add(ID_bv).get_sub();
528  bv_sub.resize(bv.size());
529 
530  for(std::size_t i=0; i<bv.size(); i++)
531  bv_sub[i].id(std::to_string(bv[i].get()));
532  return dest;
533 }
534 
536 {
537  const std::size_t width = boolbv_width(type);
538  PRECONDITION(width != 0);
539  bvt bv = prop.new_variables(width);
540  return make_bv_expr(type, bv);
541 }
542 
543 bool boolbvt::is_unbounded_array(const typet &type) const
544 {
545  if(type.id()!=ID_array)
546  return false;
547 
549  return true;
550 
551  const std::size_t size = boolbv_width(type);
552  if(size == 0)
553  return true;
554 
556  if(size > MAX_FLATTENED_ARRAY_SIZE)
557  return true;
558 
559  return false;
560 }
561 
563 {
564  // to ensure freshness of the new identifiers
565  scope_counter++;
566 
568  result.reserve(binding.variables().size());
569 
570  for(const auto &binding : binding.variables())
571  {
572  const auto &old_identifier = binding.get_identifier();
573 
574  // produce a new identifier
575  const irep_idt new_identifier =
576  "boolbvt::scope::" + std::to_string(scope_counter) +
577  "::" + id2string(old_identifier);
578 
579  result.emplace_back(new_identifier, binding.type());
580  }
581 
582  return result;
583 }
584 
585 void boolbvt::print_assignment(std::ostream &out) const
586 {
588  map.show(out);
589 }
590 
592 {
593  const struct_typet::componentst &components = src.components();
594  offset_mapt dest;
595  dest.reserve(components.size());
596  std::size_t offset = 0;
597  for(const auto &comp : components)
598  {
599  dest.push_back(offset);
600  offset += boolbv_width(comp.type());
601  }
602  return dest;
603 }
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 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:3128
const exprt & body() const
Definition: std_expr.h:3166
const array_typet & type() const
Definition: std_expr.h:3142
const symbol_exprt & arg() const
Definition: std_expr.h:3152
const exprt & size() const
Definition: std_types.h:771
const namespacet & ns
Definition: arrays.h:54
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:2846
variablest & variables()
Definition: std_expr.h:2867
std::vector< symbol_exprt > variablest
Definition: std_expr.h:2848
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:274
virtual bvt convert_with(const with_exprt &expr)
Definition: boolbv_with.cpp:15
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:130
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:277
virtual bvt convert_constraint_select_one(const exprt &expr)
virtual exprt make_free_bv_expr(const typet &type)
Definition: boolbv.cpp:535
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:591
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:562
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:543
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:483
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:319
virtual bvt convert_cond(const cond_exprt &)
Definition: boolbv_cond.cpp:13
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:514
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:83
exprt get(const exprt &expr) const override
Return expr with variables replaced by values from satisfying assignment if available.
Definition: boolbv_get.cpp:19
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:585
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:232
virtual bvt convert_bv_reduction(const unary_exprt &expr)
virtual literalt convert_equality(const equal_exprt &expr)
functionst functions
Definition: boolbv.h:115
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:103
virtual std::size_t boolbv_width(const typet &type) const
Definition: boolbv.h:97
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:524
virtual bvt convert_symbol(const exprt &expr)
Definition: boolbv.cpp:295
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_replication(const replication_exprt &expr)
literalt convert_rest(const exprt &expr) override
Definition: boolbv.cpp:330
std::vector< std::size_t > offset_mapt
Definition: boolbv.h:270
virtual bvt convert_abs(const abs_exprt &expr)
Definition: boolbv_abs.cpp:17
boolbv_mapt map
Definition: boolbv.h:118
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:467
irept & add(const irep_namet &name)
Definition: irep.cpp:116
const irept & find(const irep_namet &name) const
Definition: irep.cpp:106
const irep_idt & id() const
Definition: irep.h:407
const irep_idt & get(const irep_namet &name) const
Definition: irep.cpp:45
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:28
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:49
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:2237
const update_exprt & to_update_expr(const exprt &expr)
Cast an exprt to an update_exprt.
Definition: std_expr.h:2507
const let_exprt & to_let_expr(const exprt &expr)
Cast an exprt to a let_exprt.
Definition: std_expr.h:3043
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:2786
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:1497
const array_comprehension_exprt & to_array_comprehension_expr(const exprt &expr)
Cast an exprt to a array_comprehension_exprt.
Definition: std_expr.h:3195
const typecast_exprt & to_typecast_expr(const exprt &expr)
Cast an exprt to a typecast_exprt.
Definition: std_expr.h:1900
const complex_real_exprt & to_complex_real_expr(const exprt &expr)
Cast an exprt to a complex_real_exprt.
Definition: std_expr.h:1801
const not_exprt & to_not_expr(const exprt &expr)
Cast an exprt to an not_exprt.
Definition: std_expr.h:2152
const union_exprt & to_union_expr(const exprt &expr)
Cast an exprt to a union_exprt.
Definition: std_expr.h:1648
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:1586
const with_exprt & to_with_expr(const exprt &expr)
Cast an exprt to a with_exprt.
Definition: std_expr.h:2320
const struct_exprt & to_struct_expr(const exprt &expr)
Cast an exprt to a struct_exprt.
Definition: std_expr.h:1691
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:1447
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:1756
const member_exprt & to_member_expr(const exprt &expr)
Cast an exprt to a member_exprt.
Definition: std_expr.h:2697
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:1846
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:1382
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:3102
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:156