InnoDB: Error: log sequence number is in the future!
I would try a full resync, i.e. SST, at this point.

Note that depending on your wsrep_sst_method (see description MariaDB knowledgebase) an SST may block the donor node (node1 in this case) while it's making the backup. The default wsrep_sst_method is rsync, which is blocking. 

You should in theory be able to force an SST by removing the grastate.dat file from the datadir and then restart MariaDB, but I'm unsure if that works in your case. So if that doesn't work, then you could proceed as if you were adding a new node to the cluster. In this case, basically just wipe the datadir, run mysql_install_db, and try starting up the new node.