Coverage matcher fail in `UnsafeOperationsTest`

[dtim]

Description

Enabling coverage matcher in test cases of org.utbot.examples.unsafe.UnsafeOperationsTest leads to test failures, as no full coverage can be reached (branches: 0/0, instructions: 15/21, lines: 0/0)

It is necessary to investigate whether the coverage matcher wrongly calculates the coverage, or there really are uncovered instructions. In the latter case, investigate is there is a way to fix it.