Lets see,
Hulk vs. Wolverine 1- Wolverine is bounding around hulk, both trying to inflict damage but neither has success. Fight ends after not 1 but 2 that right 2 cheap shot by the hulk.
Hulk vs. Wolverine 2- Grey hulk thunderclaps/stuns wolvie, wolvie loses it and puts his clawed fist through hulks chest,,,,,begins to walk away, after hulk regenerates so does the fight, they share blows, no winner.
Hulk vs. wolverine 3- Wolverine attacks hulk head on with bone claws, hulk's scared at first until he realized they're bone and the two "fight" hulk gains upper hand AFTER wolverine stops to reason with the hulk.
hulk vs. wolverine 4- bone clawed wolverine goes 1 on 1 with the hulk, Wolverine stabs hulk in the junk and eye sockets. after long fight wolverine wins by circumstances....much the same way spidey "beat" juggernaught.
hulk vs. wolverine 4- Wolverine as death attacks hulk after long battle wolverine's claws go through hulks neck and wolverine begins to unleash. Hulk IS about to die, until wolverine stops, once again hulk cheap shots him while distracted.
Hulk ws. wolverine 5- wolverine and Hulk meet in h2h and wolverine's doing alright until he gets cocky and punched into the stratosphere.
I don't know, from what I've seen, I'd say the fight's circumstantial. h
Hulk obviously has an advantage, but to say wolverine has 0% chance of winning is somewhat ignorant of all of the showings he's given the hulk.