The analyzer has detected a faulty or suboptimal loop. A standard pattern is used where some operation is executed for every pair of elements of an array. This operation, however, is usually not required for a pair whose members are the same element, i.e. when 'i == j'. For example:
for (int i = 0; i < size; i++) for (int j = i; j < size; j++) ...
It is highly possible that a more correct and effective way to traverse the arrays would probably be this:
for (int i = 0; i < size; i++) for (int j = i + 1; j < size; j++) ...
According to Common Weakness Enumeration, potential errors found by using this diagnostic are classified as CWE-691.