Bash Stress Testing

#!/usr/bin/bash


diff_found=0

for i in {0..300}
do
        python3 test_gen.py > input

        ./right < input > right_output
        ./possible < input > possible_output

        if diff -y right_output possible_output > differs;
        then
                echo "test $i passed"
        else
                echo "test $i failed"
                diff_found=1
                break
        fi
done

if [ $diff_found -eq 1 ]
then
        echo "input:"
        cat input
        echo ""

        echo "output testing"
        cat possible_output
        echo ""

        echo "output right"
        cat right_output
        echo ""

else
        echo "accepted"
fi