Will the search warrant be legal evidence of guilt if the police broke into...

YES, it can. Under certain circumstances, a search may be conducted without a court order.

According to Part 3 of Article 233 of the Criminal Procedure Code of Ukraine, the Investigator, investigator, prosecutor has the right to enter the home or other property of a person before the decision of the investigating judge is issued only in urgent cases related to saving lives and property or direct prosecution of persons suspected of committing a criminal offense. In such a case, the prosecutor, investigator, inquirer, in agreement with the prosecutor, is obliged to apply to the investigating judge immediately after taking such actions with a request to conduct a search. The investigating judge examines such a petition in accordance with the requirements of Article 234 of this Code, checking, among other things, whether there really were grounds for entering a person's home or other property without a decision of the investigating judge. If the prosecutor refuses to agree to the request of the investigator, the inquirer for a search or the investigating judge refuses to grant the request for a search, the evidence established as a result of such a search is inadmissible, and the obtained information is subject to destruction in the manner provided for in Article 255 of this Code.