NO
Nontermination proof succeeded
Found this recurrent set for cutpoint 5: 25 <= arg1 and arg1 <= 29 and 25 <= arg1P and arg1P <= 29 and 26 <= arg2 and arg2 <= 30 and arg1P-arg1 <= 0 and arg1-arg1P <= 0 and arg1P+arg1 <= 58 and 50 <= arg1P+arg1 and arg2-arg1 <= 1 and arg1-arg2 <= -1 and arg2+arg1 <= 59 and 51 <= arg2+arg1 and arg2-arg1P <= 1 and arg1P-arg2 <= -1 and arg2+arg1P <= 59 and 51 <= arg2+arg1P and -arg1+31 <= 0
Errors: