You should read the articles about Pollards Kangaroo Algorithm and BSGS.
If you find the key with BSGS in range, than you know 100% for sure, that the key is in range. And if a baby step is not found in the defined range for the pubkey than it will find no solution.
I do not know if you are joking or serious.
Your answer is totally useless and does not even touch any of my questions.
Claiming that if you find key in range then you are sure 100% is there is childisch and raising my doubts for your mental health