TL;DR How can I split a line into an array?

I have a file

cmd1 arga ... argm count
cmd2 arga ... argn count
cmd1 arga ... argm count
cmd1 arga ... argj count
cmd4 arga ... argk count
cmd2 arga ... argn count

where each line contains a command name, a variable number of arguments and a count number.

I’m writing a Bash script that reads a line from said file, via stdin, processes the arguments and invokes $count times the command, like

while : ; do
  IFS= read line
  ???
  for n in $(seq $count) ; do
    $cmd $(funabc $a $b $c) $(funrest $c ... $last)
  done
done

I guess that I have to use an array (so maybe it’s a a XY problem..), but I don’t know how to go from $line to an array.