added init_state axiom for sum of balances

3 years ago · 27fa53bba9
parent b90d195c6c
commit 27fa53bba9
1 changed files with 3 additions and 1 deletions
--- a/certora/specs/ERC1155Supply.spec
+++ b/certora/specs/ERC1155Supply.spec
@ -32,7 +32,9 @@ filtered {

 /******************************************************************************/

-ghost mapping(uint256 => mathint) sumOfBalances;
+ghost mapping(uint256 => mathint) sumOfBalances {
+    init_state axiom forall uint256 token . sumOfBalances[token] == 0;
+}

 hook Sstore _balances[KEY uint256 token][KEY address user] uint256 newValue (uint256 oldValue) STORAGE {
    sumOfBalances[token] = sumOfBalances[token] + newValue - oldValue;