benchmark2/integer overflow/1433.sol

pragma solidity ^0.4.16;


library SafeMath {
  function mul(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function div(uint256 a, uint256 b) internal constant returns (uint256) {
    
    uint256 c = a / b;
    
    return c;
  }

  function sub(uint256 a, uint256 b) internal constant returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function add(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}


contract ERC20Basic {
  uint256 public totalSupply;
  function balanceOf(address who) public constant returns (uint256);
  function transfer(address to, uint256 value) public returns (bool);
  event Transfer(address indexed from, address indexed to, uint256 value);
}


contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  
  function transfer(address _to, uint256 _value) public returns (bool) {
    require(_to != address(0));
    require(_value > 0 && _value <= balances[msg.sender]);

    
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    Transfer(msg.sender, _to, _value);
    return true;
  }

  
  function balanceOf(address _owner) public constant returns (uint256 balance) {
    return balances[_owner];
  }
}


contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) public constant returns (uint256);
  function transferFrom(address from, address to, uint256 value) public returns (bool);
  function approve(address spender, uint256 value) public returns (bool);
  event Approval(address indexed owner, address indexed spender, uint256 value);
}



contract StandardToken is ERC20, BasicToken {

  mapping (address => mapping (address => uint256)) internal allowed;


  
  function transferFrom(address _from, address _to, uint256 _value) public returns (bool) {
    require(_to != address(0));
    require(_value > 0 && _value <= balances[_from]);
    require(_value <= allowed[_from][msg.sender]);

    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
    Transfer(_from, _to, _value);
    return true;
  }

  
  function approve(address _spender, uint256 _value) public returns (bool) {
    allowed[msg.sender][_spender] = _value;
    Approval(msg.sender, _spender, _value);
    return true;
  }

  
  function allowance(address _owner, address _spender) public constant returns (uint256 remaining) {
    return allowed[_owner][_spender];
  }
}


contract Ownable {
  address public owner;


  event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);


  
  function Ownable() {
    owner = msg.sender;
  }


  
  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }


  
  function transferOwnership(address newOwner) onlyOwner public {
    require(newOwner != address(0));
    OwnershipTransferred(owner, newOwner);
    owner = newOwner;
  }

}


contract Pausable is Ownable {
  event Pause();
  event Unpause();

  bool public paused = false;


  
  modifier whenNotPaused() {
    require(!paused);
    _;
  }

  
  modifier whenPaused() {
    require(paused);
    _;
  }

  
  function pause() onlyOwner whenNotPaused public {
    paused = true;
    Pause();
  }

  
  function unpause() onlyOwner whenPaused public {
    paused = false;
    Unpause();
  }
}



contract PausableToken is StandardToken, Pausable {
  mapping (address => bool) public frozenAccount;
  event FrozenFunds(address target, bool frozen);

  function transfer(address _to, uint256 _value) public whenNotPaused returns (bool) {
    require(!frozenAccount[msg.sender]);
    return super.transfer(_to, _value);
  }

  function transferFrom(address _from, address _to, uint256 _value) public whenNotPaused returns (bool) {
    require(!frozenAccount[_from]);
    return super.transferFrom(_from, _to, _value);
  }

  function approve(address _spender, uint256 _value) public whenNotPaused returns (bool) {
    
    return super.approve(_spender, _value);
  }
  
  function batchTransfer(address[] _receivers, uint256 _value) public whenNotPaused returns (bool) {
    require(!frozenAccount[msg.sender]);
    uint cnt = _receivers.length;
    uint256 amount = uint256(cnt).mul(_value);
    require(cnt > 0 && cnt <= 121);
    require(_value > 0 && balances[msg.sender] >= amount);
    
    balances[msg.sender] = balances[msg.sender].sub(amount);
    for (uint i = 0; i < cnt; i++) {
        require (_receivers[i] != 0x0);
        balances[_receivers[i]] = balances[_receivers[i]].add(_value);
        Transfer(msg.sender, _receivers[i], _value);
    }
    return true;
  }
  
  function freezeAccount(address target, bool freeze) onlyOwner public {
    frozenAccount[target] = freeze;
    FrozenFunds(target, freeze);
  }
  
  function batchFreeze(address[] addresses, bool freeze) onlyOwner public {
    for (uint i = 0; i < addresses.length; i++) {
        frozenAccount[addresses[i]] = freeze;
        FrozenFunds(addresses[i], freeze);
    }
  }
}


contract AdvancedToken is PausableToken {
    
    string public name = "FChain";
    string public symbol = "FY";
    string public version = '3.0.0';
    uint8 public decimals = 18;

    
    function AdvancedToken() {
      totalSupply = 100 * 10000 * 10000 * (10**(uint256(decimals)));
      balances[msg.sender] = totalSupply;    
    }

    function () external payable {
        
        revert();
    }
}