function test_dispute_on_non_existing_sr() public {
    // setup shorts
    makeShorts({singleShorter: true});

    _setETH(1000 ether);
    skip(1 hours);

    STypes.ShortRecord memory sr1 = diamond.getShortRecord(asset, sender, C.SHORT_STARTING_ID);
    STypes.ShortRecord memory sr2 = diamond.getShortRecord(asset, sender, C.SHORT_STARTING_ID+1);
    STypes.ShortRecord memory sr3 = diamond.getShortRecord(asset, sender, C.SHORT_STARTING_ID+2);

    uint256 cr1 = diamond.getCollateralRatio(asset, sr1);
    uint256 cr2 = diamond.getCollateralRatio(asset, sr2);
    uint256 cr3 = diamond.getCollateralRatio(asset, sr3);

    // CRs are increasing
    assertGt(cr2, cr1);
    assertGt(cr3, cr2);

    // user creates a wrong proposal
    MTypes.ProposalInput[] memory proposalInputs =
        makeProposalInputsForDispute({shortId1: C.SHORT_STARTING_ID + 1, shortId2: C.SHORT_STARTING_ID + 2});

    address redeemer = receiver;
    vm.prank(redeemer);
    diamond.proposeRedemption(asset, proposalInputs, DEFAULT_AMOUNT * 3 / 2, MAX_REDEMPTION_FEE);

    // on of the SRs in the proposal is closed
    fundLimitAskOpt(DEFAULT_PRICE, DEFAULT_AMOUNT / 2, extra);
    exitShort(C.SHORT_STARTING_ID + 2, DEFAULT_AMOUNT / 2, DEFAULT_PRICE, sender);

    // SR is now closed
    sr3 = diamond.getShortRecord(asset, sender, C.SHORT_STARTING_ID+2);

    assertEq(uint(sr3.status), uint(SR.Closed));

    uint88 collateralBefore = sr3.collateral;

    // another user disputes the wrong proposal
    address disputer = extra;
    vm.prank(disputer);
    diamond.disputeRedemption({
        asset: asset,
        redeemer: redeemer,
        incorrectIndex: 0,
        disputeShorter: sender,
        disputeShortId: C.SHORT_STARTING_ID
    });

    // SR is still closed and collateral increased
    sr3 = diamond.getShortRecord(asset, sender, C.SHORT_STARTING_ID+2);
    assertEq(uint(sr3.status), uint(SR.Closed));
    assertGt(sr3.collateral, collateralBefore);
}
