fix2

certora/applyHarness.patch

@@ -84,7 +84,7 @@ diff -druN governance/TimelockController.sol governance/TimelockController.sol
       * @dev Emitted when a call is scheduled as part of operation `id`.
 diff -druN governance/utils/Votes.sol governance/utils/Votes.sol
 --- governance/utils/Votes.sol	2023-02-27 10:59:32.655891529 +0100
-+++ governance/utils/Votes.sol	2023-02-27 13:45:38.363620120 +0100
++++ governance/utils/Votes.sol	2023-02-27 13:56:39.610815192 +0100
 @@ -35,7 +35,25 @@
      bytes32 private constant _DELEGATION_TYPEHASH =
          keccak256("Delegation(address delegatee,uint256 nonce,uint256 expiry)");
@@ -102,7 +102,7 @@ diff -druN governance/utils/Votes.sol governance/utils/Votes.sol
 +        return SafeCast.toUint32(_delegateCheckpoints[account]._checkpoints.length);
 +    }
 +    function ckptFromBlock(address account, uint32 pos) public view returns (uint32) {
-+        return _delegateCheckpoints[account]._checkpoints[pos]._blockNumber;
++        return _delegateCheckpoints[account]._checkpoints[pos]._key;
 +    }
 +    function ckptVotes(address account, uint32 pos) public view returns (uint224) {
 +        return _delegateCheckpoints[account]._checkpoints[pos]._value;

certora/harnesses/GovernorFullHarness.sol

@@ -17,9 +17,7 @@ contract GovernorFullHarness is
     GovernorVotes,
     GovernorVotesQuorumFraction
 {
-    using SafeCast for uint256;
-    using Timers for Timers.BlockNumber;
-    using Checkpoints for Checkpoints.History;
+    using Checkpoints for Checkpoints.Trace224;
 
     constructor(
         IVotes _token,
@@ -38,7 +36,7 @@ contract GovernorFullHarness is
 
     // variable added to check when _castVote is called
     uint256 public latestCastVoteCall;
-    
+
     // Harness from Votes //
 
     function getPastTotalSupply(uint256 blockNumber) public view returns(uint256) {
@@ -65,15 +63,15 @@ contract GovernorFullHarness is
     }
 
     function getExtendedDeadlineIsUnset(uint256 proposalId) public view returns (bool) {
-        return _extendedDeadlines[proposalId].isUnset();
+        return _extendedDeadlines[proposalId] == 0;
     }
 
     function getExtendedDeadlineIsStarted(uint256 proposalId) public view returns (bool) {
-        return _extendedDeadlines[proposalId].isStarted();
+        return _extendedDeadlines[proposalId] > 0;
     }
 
     function getExtendedDeadline(uint256 proposalId) public view returns (uint64) {
-        return _extendedDeadlines[proposalId].getDeadline();
+        return _extendedDeadlines[proposalId];
     }
 
     // Harness from GovernorCountingSimple //