array3.c

#include "../../include/boolector.h"
#include <assert.h>
#include <limits.h>

#define ARRAY3_EXAMPLE_VALUE_BW 8
#define ARRAY3_EXAMPLE_INDEX_BW 1

int
main ()
{
  int sat_result;
  BtorExp *array, *index1, *index2, *read1, *read2, *eq, *ne;
  Btor *btor;

  btor = boolector_new ();
  boolector_enable_inc_usage (btor);

  array =
    boolector_array (btor, ARRAY3_EXAMPLE_VALUE_BW, ARRAY3_EXAMPLE_INDEX_BW,
                     NULL);
  index1 = boolector_var (btor, ARRAY3_EXAMPLE_INDEX_BW, NULL);
  index2 = boolector_var (btor, ARRAY3_EXAMPLE_INDEX_BW, NULL);
  read1 = boolector_read (btor, array, index1);
  read2 = boolector_read (btor, array, index2);
  eq = boolector_eq (btor, index1, index2);
  ne = boolector_ne (btor, read1, read2);

  /* we enforce that index1 is equal to index 2 */
  boolector_assert (btor, eq);
  sat_result = boolector_sat (btor);
  assert (sat_result == BOOLECTOR_SAT);
  /* now we additionally assume that the read values differ
   * the instance is now unsatasfiable as read congruence is violated */
  boolector_assume (btor, ne);
  sat_result = boolector_sat (btor);
  assert (sat_result == BOOLECTOR_UNSAT);
  /* after the SAT call the assumptions are gone
   * the instance is now satisfiable again */
  sat_result = boolector_sat (btor);
  assert (sat_result == BOOLECTOR_SAT);
  boolector_release (btor, array);
  boolector_release (btor, index1);
  boolector_release (btor, index2);
  boolector_release (btor, read1);
  boolector_release (btor, read2);
  boolector_release (btor, eq);
  boolector_release (btor, ne);
  boolector_delete (btor);
  return 0;
}

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