NO
Nontermination proof succeeded
Found this recurrent set for cutpoint 6: 20 <= arg1 and 20 <= arg1P and arg2 <= -20 and arg2P <= -20 and arg2-arg1 <= -40 and arg1+arg2 <= 0 and 0 <= arg1+arg2 and 20 <= arg1+arg3P and arg1P-arg1 <= 0 and arg1-arg1P <= 0 and 40 <= arg1P+arg1 and arg2-arg1P <= -40 and arg1P+arg2 <= 0 and 0 <= arg1P+arg2 and arg2P-arg1P <= -40 and arg1P+arg2P <= 0 and 0 <= arg1P+arg2P and 20 <= arg1P+arg3P and arg2-arg3P <= -20 and arg2P-arg1 <= -40 and arg2P+arg1 <= 0 and 0 <= arg2P+arg1 and arg2P-arg2 <= 0 and arg2-arg2P <= 0 and arg2P+arg2 <= -40 and arg2P-arg3P <= -20 and 20 <= arg3+arg1 and 20 <= arg3+arg1P and arg2-arg3 <= -20 and arg2P-arg3 <= -20 and arg3-arg3P <= 0 and arg3P-arg3 <= 0 and -arg3-arg1+5 <= 0 and arg3-arg1+5 <= 0 and arg3-arg1 <= 0 and -arg3+arg2 <= 0 and arg3 <= 0
Errors: