Did the inquisitors lose any sleep when they tortured a suspected witch to death without getting a confession?

During the inquisition anyone suspected of heresy or witchcraft was rounded up and tortured until they confessed, at which point they were executed for their ‘crime’.

But every now and then someone of firm character simply would not crack and ended up being tortured to death, at which point the inquisitors concluded they must regrettably have been innocent, but it was now too late to tell them that. So did the obvious insanity of that ever sink in, or did the inquisitors simply rationalize, better them than me?