sanity for TimelockController and Votes

certora/munged/mocks/SignedMathMock.sol

@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity ^0.8.0;
+
+import "../utils/math/SignedMath.sol";
+
+contract SignedMathMock {
+    function max(int256 a, int256 b) public pure returns (int256) {
+        return SignedMath.max(a, b);
+    }
+
+    function min(int256 a, int256 b) public pure returns (int256) {
+        return SignedMath.min(a, b);
+    }
+
+    function average(int256 a, int256 b) public pure returns (int256) {
+        return SignedMath.average(a, b);
+    }
+
+    function abs(int256 n) public pure returns (uint256) {
+        return SignedMath.abs(n);
+    }
+}