Hint Resolve node_data_isptr : saturate_local.

Lemma node_data_share_join : forall gsh1 gsh2 sh1 sh2 sh rep p, readable_share sh1 -> readable_share sh2 ->
sepalg.join sh1 sh2 sh ->
node_data gsh1 gsh2 sh1 rep p * node_data gsh1 gsh2 sh2 rep p = node_data gsh1 gsh2 sh rep p.