function sortVaultsByDelta(..)
..
    for (uint256 i = 0; i < N_COINS; i++) {
        // Get difference between vault current assets and vault target
        int256 delta = int256(unifiedAssets[i] - unifiedTotalAssets.mul(targetPercents[i]).div(PERCENTAGE_DECIMAL_FACTOR)); // underflow in intermediate result
 function decreaseGTokenLastAmount(bool pwrd, uint256 dollarAmount, uint256 bonus)...
..
 emit LogNewGtokenChange(pwrd, int256(-dollarAmount)); // underflow in intermediate result
function safetyCheck() external view override returns (bool) {
    ...
        _ratio = abs(int256(_ratio - lastRatio[i])); // underflow in intermediate result
