int
main (void)
{
Btor *btor;
BoolectorNode *array1, *array2, *zero, *one, *val1, *val2;
BoolectorNode *write1, *write2, *formula;
char **indices, **values;
int result, size, i;
btor = boolector_new ();
boolector_set_opt (btor, "model_gen", 1);
zero = boolector_zero (btor, ARRAY2_EXAMPLE_INDEX_BW);
one = boolector_one (btor, ARRAY2_EXAMPLE_INDEX_BW);
val1 = boolector_int (btor, 3, ARRAY2_EXAMPLE_VALUE_BW);
val2 = boolector_int (btor, 5, ARRAY2_EXAMPLE_VALUE_BW);
array1 =
boolector_array (btor, ARRAY2_EXAMPLE_VALUE_BW, ARRAY2_EXAMPLE_INDEX_BW,
NULL);
array2 =
boolector_array (btor, ARRAY2_EXAMPLE_VALUE_BW, ARRAY2_EXAMPLE_INDEX_BW,
NULL);
write1 = boolector_write (btor, array1, zero, val1);
write2 = boolector_write (btor, array2, one, val2);
/* Note: we compare two arrays for equality ---> needs extensional theory */
formula = boolector_eq (btor, write1, write2);
boolector_assert (btor, formula);
result = boolector_sat (btor);
if (result == BOOLECTOR_SAT)
printf ("Formula is satisfiable\n");
else
abort ();
/* Formula is satisfiable, we can obtain array models: */
boolector_array_assignment (btor, array1, &indices, &values, &size);
if (size > 0)
{
printf ("Array1:\n");
for (i = 0; i < size; i++)
printf ("Array1[%s] = %s\n", indices[i], values[i]);
boolector_free_array_assignment (btor, indices, values, size);
}
boolector_array_assignment (btor, array2, &indices, &values, &size);
if (size > 0)
{
printf ("\nArray2:\n");
for (i = 0; i < size; i++)
printf ("Array2[%s] = %s\n", indices[i], values[i]);
boolector_free_array_assignment (btor, indices, values, size);
}
boolector_array_assignment (btor, write1, &indices, &values, &size);
if (size > 0)
{
printf ("\nWrite1:\n");
for (i = 0; i < size; i++)
printf ("Write1[%s] = %s\n", indices[i], values[i]);
boolector_free_array_assignment (btor, indices, values, size);
}
boolector_array_assignment (btor, write2, &indices, &values, &size);
if (size > 0)
{
printf ("\nWrite2:\n");
for (i = 0; i < size; i++)
printf ("Write2[%s] = %s\n", indices[i], values[i]);
boolector_free_array_assignment (btor, indices, values, size);
}
/* clean up */
boolector_release (btor, formula);
boolector_release (btor, write1);
boolector_release (btor, write2);
boolector_release (btor, array1);
boolector_release (btor, array2);
boolector_release (btor, val1);
boolector_release (btor, val2);
boolector_release (btor, zero);
boolector_release (btor, one);
assert (boolector_get_refs (btor) == 0);
boolector_delete (btor);
return 0;
}
int
main (void)
{
Btor *btor;
BtorNode *v1, *v2, *add, *zero, *vars_sgt_zero, *impl;
BtorNode *v1_sgt_zero, *v2_sgt_zero, *add_sgt_zero, *formula;
char *assignments[10];
int result, i;
btor = boolector_new ();
boolector_enable_model_gen (btor);
v1 = boolector_var (btor, BV2_EXAMPLE_NUM_BITS, NULL);
v2 = boolector_var (btor, BV2_EXAMPLE_NUM_BITS, NULL);
zero = boolector_zero (btor, BV2_EXAMPLE_NUM_BITS);
v1_sgt_zero = boolector_sgt (btor, v1, zero);
v2_sgt_zero = boolector_sgt (btor, v2, zero);
vars_sgt_zero = boolector_and (btor, v1_sgt_zero, v2_sgt_zero);
add = boolector_add (btor, v1, v2);
add_sgt_zero = boolector_sgt (btor, add, zero);
impl = boolector_implies (btor, vars_sgt_zero, add_sgt_zero);
/* We negate the formula and try to show that the negation is unsatisfiable */
formula = boolector_not (btor, impl);
/* We assert the formula and call Boolector */
boolector_assert (btor, formula);
result = boolector_sat (btor);
if (result == BOOLECTOR_SAT)
printf ("Instance is satisfiable");
else
abort ();
/* The formula is not valid, we have found a counter-example.
* Now, we are able to obtain assignments to arbitrary expressions */
i = 0;
assignments[i++] = boolector_bv_assignment (btor, zero);
assignments[i++] = boolector_bv_assignment (btor, v1);
assignments[i++] = boolector_bv_assignment (btor, v2);
assignments[i++] = boolector_bv_assignment (btor, add);
assignments[i++] = boolector_bv_assignment (btor, v1_sgt_zero);
assignments[i++] = boolector_bv_assignment (btor, v2_sgt_zero);
assignments[i++] = boolector_bv_assignment (btor, vars_sgt_zero);
assignments[i++] = boolector_bv_assignment (btor, add_sgt_zero);
assignments[i++] = boolector_bv_assignment (btor, impl);
assignments[i++] = boolector_bv_assignment (btor, formula);
i = 0;
printf ("Assignment to 0: %s\n", assignments[i++]);
printf ("Assignment to v1: %s\n", assignments[i++]);
printf ("Assignment to v2: %s\n", assignments[i++]);
printf ("Assignment to v1 + v2: %s\n", assignments[i++]);
printf ("Assignment to v1 > 0: %s\n", assignments[i++]);
printf ("Assignment to v2 > 0: %s\n", assignments[i++]);
printf ("Assignment to v1 > 0 & v2 > 0: %s\n", assignments[i++]);
printf ("Assignment to v1 + v2 > 0: %s\n", assignments[i++]);
printf ("Assignment to v1 > 0 & v2 > 0 => v1 + v2 > 0: %s\n",
assignments[i++]);
printf ("Assignment to !(v1 > 0 & v2 > 0 => v1 + v2 > 0): %s\n",
assignments[i++]);
for (i = 0; i < 10; i++)
boolector_free_bv_assignment (btor, assignments[i]);
/* cleanup */
boolector_release (btor, zero);
boolector_release (btor, v1);
boolector_release (btor, v2);
boolector_release (btor, add);
boolector_release (btor, impl);
boolector_release (btor, formula);
boolector_release (btor, v1_sgt_zero);
boolector_release (btor, v2_sgt_zero);
boolector_release (btor, vars_sgt_zero);
boolector_release (btor, add_sgt_zero);
assert (boolector_get_refs (btor) == 0);
boolector_delete (btor);
return 0;
}
