How else can i increment my count values? I've tried using LOGIC_arith.ALL; and then also tried it with IEEE.NUMERIC_STD.ALL; still no luck

Question

library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.NUMERIC_STD.ALL;


entity VM is
port (
      clk,reset,P1,P2,P3,sel: in std_logic;
        c1_op,c2_op,c3_op: out