NO
Nontermination proof succeeded
Found this recurrent set for cutpoint 7: arg1 <= 0 and arg1P <= 0 and 2 <= arg2 and 0 <= x11 and 0 <= x12 and 0 <= x26 and 0 <= x27 and arg1-arg2 <= -2 and arg1-x11 <= 0 and arg1-x12 <= 0 and arg1-x26 <= 0 and arg1+x26 <= 0 and arg1-x27 <= 0 and arg1P-arg1 <= 0 and arg1-arg1P <= 0 and arg1P+arg1 <= 0 and arg1P-arg2 <= -2 and arg1P-x11 <= 0 and arg1P-x12 <= 0 and arg1P-x26 <= 0 and arg1P+x26 <= 0 and arg1P-x27 <= 0 and 2 <= arg2+x11 and 2 <= arg2+x12 and 2 <= arg2+x26 and 2 <= arg2+x27 and 0 <= x11+x12 and 0 <= x11+x26 and 0 <= x11+x27 and 0 <= x12+x26 and 0 <= x12+x27 and 0 <= x26+x27 and x28-x27 <= 0 and arg1+1 <= 0
Errors: