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#include <assert.h>
struct S
{
short x[3];
char c;
};
int main(void)
{
__CPROVER_field_decl_local("f", (char)0);
struct S s;
// Setting the struct recursively set all its fields
__CPROVER_set_field(&s, "f", 1);
assert(__CPROVER_get_field(&s.x[0], "f") == 1);
assert(__CPROVER_get_field(&s.x[1], "f") == 1);
assert(__CPROVER_get_field(&s.x[2], "f") == 1);
assert(__CPROVER_get_field(&s.c, "f") == 1);
assert(__CPROVER_get_field(&s, "f") == 1);
// Setting the struct recursively set all its fields
__CPROVER_set_field(&s, "f", 0);
assert(__CPROVER_get_field(&s.x[0], "f") == 0);
assert(__CPROVER_get_field(&s.x[1], "f") == 0);
assert(__CPROVER_get_field(&s.x[2], "f") == 0);
assert(__CPROVER_get_field(&s.c, "f") == 0);
assert(__CPROVER_get_field(&s, "f") == 0);
// Setting a field of the struct changes its values ad after aggregation the whole struct value
__CPROVER_set_field(&s.x[1], "f", 2);
assert(__CPROVER_get_field(&s.x[0], "f") == 0);
assert(__CPROVER_get_field(&s.x[1], "f") == 2);
assert(__CPROVER_get_field(&s.x[2], "f") == 0);
assert(__CPROVER_get_field(&s.c, "f") == 0);
assert(__CPROVER_get_field(&s, "f") == 2);
// Rest shadow memory
__CPROVER_set_field(&s, "f", 0);
// Changing ONLY first cell of S array at field x by using offset with pointer arithmetics
short *p = ((short *)&s) + 1;
__CPROVER_set_field(p, "f", 3);
assert(__CPROVER_get_field(&s.x[0], "f") == 0);
assert(__CPROVER_get_field(&s.x[1], "f") == 3);
assert(__CPROVER_get_field(&s.x[2], "f") == 0);
assert(__CPROVER_get_field(&s.c, "f") == 0);
assert(__CPROVER_get_field(&s, "f") == 3);
return 0;
}
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