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rounding_trap

rounding_trap-2026400003

Amount precision is inconsistent across entries.

expects rounding_trap

Statement files

15 highlighted lines differ from the same seed rendered without perturbations. That difference is the trap.

bnp_camt053.xml15 changed lines · first at line 35
<?xml version='1.0' encoding='utf-8'?>
<Document xmlns="urn:iso:std:iso:20022:tech:xsd:camt.053.001.02">
<BkToCstmrStmt>
<GrpHdr>
<MsgId>LB-acct-2026400003-2-2025-03-31</MsgId>
<CreDtTm>2025-03-31T23:59:00+00:00</CreDtTm>
</GrpHdr>
<Stmt>
<Id>acct-2026400003-2</Id>
<ElctrncSeqNb>1</ElctrncSeqNb>
<CreDtTm>2025-03-31T23:59:00+00:00</CreDtTm>
<FrToDt>
<FrDtTm>2025-03-01T00:00:00+00:00</FrDtTm>
<ToDtTm>2025-03-31T23:59:59+00:00</ToDtTm>
</FrToDt>
<Acct>
<Id>
<IBAN>GB39LBEN20351118287004</IBAN>
</Id>
<Ccy>GBP</Ccy>
</Acct>
<Bal>
<Tp>
<CdOrPrtry>
<Cd>OPBD</Cd>
</CdOrPrtry>
</Tp>
<Amt Ccy="GBP">200893.28</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Dt>
<Dt>2025-03-01</Dt>
</Dt>
</Bal>
<Ntry>
<Amt Ccy="GBP">4407.9700</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-02</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-02</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t006</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO LARKSPUR TRAVEL REF710932</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">11672.97</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-03</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-03</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t010</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR MOORLAND TELECOM REF252546</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">161.47</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-03</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-03</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t027</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPO EASTFIELD ENERGY REF223979</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">2160.94</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-05</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-05</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t026</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>TFR MOORLAND TELECOM REF351567</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">2912.55</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-08</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-08</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t016</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR JUNIPER PAYROLL REF772917</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">9554.30</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-08</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-08</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t030</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO GREENHOLM FOODS REF311715</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">11130.620</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-09</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-09</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t003</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>DD JUNIPER PAYROLL REF606139</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">4356.6300</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-09</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-09</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t007</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP DELPHINIUM MEDIA REF630046</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">1464.89</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-09</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-09</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t012</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP CASTLEGATE PROPERTY REF128312</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">14987.970</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-10</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-10</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t018</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR GREENHOLM FOODS REF796221</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">9122.31</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-11</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-11</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t001</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI HARBOURLIGHT IT REF548957</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">1233.46</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-12</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-12</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t031</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO OSPREY LEASING REF291832</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">13538.2600</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-13</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-13</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t013</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>TFR OSPREY LEASING REF136723</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">2088.310</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-13</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-13</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t019</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO NORTHGATE CLEANING REF227959</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">5889.0000</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-15</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-15</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t022</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI MOORLAND TELECOM REF578911</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">3331.77</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-17</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-17</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t020</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>SO LARKSPUR TRAVEL REF854222</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">3393.31</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-17</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-17</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t024</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>CR MOORLAND TELECOM REF658809</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">6408.580</Amt>
<CdtDbtInd>DBIT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-22</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-22</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t017</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>BP CASTLEGATE PROPERTY REF394107</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">174.3100</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-22</Dt>
</BookgDt>
<ValDt>
<Dt>2025-03-22</Dt>
</ValDt>
<AcctSvcrRef>acct-2026400003-2-t021</AcctSvcrRef>
<NtryDtls>
<TxDtls>
<RmtInf>
<Ustrd>FPI FENWICK &amp; PARTNERS REF643470</Ustrd>
</RmtInf>
</TxDtls>
</NtryDtls>
</Ntry>
<Ntry>
<Amt Ccy="GBP">304.84</Amt>
<CdtDbtInd>CRDT</CdtDbtInd>
<Sts>BOOK</Sts>
<BookgDt>
<Dt>2025-03-23</Dt>
hsbc_statement.xlsxUntouched by this perturbation
[sheet: Statement]
HSBC Bank plc
Business Current Account Statement
Account name: LEDGERBENCH DEMO LTD
Sort code / Account number: 48-59-49 30599082
Account reference: acct-2026400003-1
Statement period: 01 Mar 2025 to 31 Mar 2025
Currency: GBP
Opening balance: 10549.96
Date Payment type Details Paid out Paid in
01 Mar 2025 DD EASTFIELD ENERGY REF715593 6407.44
05 Mar 2025 TFR FENWICK & PARTNERS REF117258 10700.04
05 Mar 2025 FPO OSPREY LEASING REF455605 475.92
07 Mar 2025 DD MOORLAND TELECOM REF932316 11066.58
08 Mar 2025 BP JUNIPER PAYROLL REF984004 4208.78
10 Mar 2025 SO FENWICK & PARTNERS REF546635 11439.45
10 Mar 2025 FPO NORTHGATE CLEANING REF980434 2072.62
12 Mar 2025 FPI DELPHINIUM MEDIA REF594138 14530.36
14 Mar 2025 SO JUNIPER PAYROLL REF273421 13758.79
16 Mar 2025 TFR FENWICK & PARTNERS REF192068 10315.56
16 Mar 2025 TFR MOORLAND TELECOM REF763154 6502.52
16 Mar 2025 FPO CASTLEGATE PROPERTY REF775059 6332.96
17 Mar 2025 BP GREENHOLM FOODS REF661548 12900.83
18 Mar 2025 DD HARBOURLIGHT IT REF156319 6383.63
18 Mar 2025 CR JUNIPER PAYROLL REF411102 14155.24
20 Mar 2025 BP GREENHOLM FOODS REF417595 9622.82
21 Mar 2025 CR NORTHGATE CLEANING REF600642 14189.74
21 Mar 2025 DD GREENHOLM FOODS REF971232 3179.28
21 Mar 2025 BP GREENHOLM FOODS REF786762 2801.93
24 Mar 2025 BP GREENHOLM FOODS REF521000 2017.09
25 Mar 2025 SO NORTHGATE CLEANING REF834541 2355.49
25 Mar 2025 DD IRONBRIDGE TOOLING REF703593 498.41
26 Mar 2025 BP GREENHOLM FOODS REF935738 10215.18
26 Mar 2025 FPI BRAMBLE LOGISTICS REF296110 1236.15
26 Mar 2025 TFR LARKSPUR TRAVEL REF662518 14981.79
27 Mar 2025 FPI MOORLAND TELECOM REF663361 6439.80
27 Mar 2025 FPO CASTLEGATE PROPERTY REF972331 13439.10
29 Mar 2025 SO NORTHGATE CLEANING REF394380 5206.81
30 Mar 2025 BP IRONBRIDGE TOOLING REF618330 7930.42
31 Mar 2025 SO AURORA CONSULTING LTD REF570196 14538.99
31 Mar 2025 CR GREENHOLM FOODS REF189305 1002.55
rbs_transactions.csvUntouched by this perturbation
"Date","Type","Description","Value","Account Name","Account Number","Ledger Ref"
"01/03/2025","BAL","OPENING BALANCE","190157.24","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"02/03/2025","BP","BP KESTREL INSURANCE REF888561","-968.78","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"05/03/2025","DD","DD KESTREL INSURANCE REF148157","-2904.75","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"05/03/2025","BP","BP GREENHOLM FOODS REF498037","-6212.64","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"05/03/2025","FPO","FPO OSPREY LEASING REF502790","-757.74","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"07/03/2025","FPO","FPO OSPREY LEASING REF173423","-3220.20","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"09/03/2025","BP","BP BRAMBLE LOGISTICS REF851638","-5628.10","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"10/03/2025","BP","BP DELPHINIUM MEDIA REF112569","-2083.19","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"10/03/2025","BP","BP HARBOURLIGHT IT REF335741","-9385.63","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"12/03/2025","TFR","TFR FENWICK & PARTNERS REF857461","12247.79","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"13/03/2025","FPO","FPO FENWICK & PARTNERS REF331209","-8646.33","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"14/03/2025","FPI","FPI OSPREY LEASING REF736910","5213.94","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"15/03/2025","SO","SO EASTFIELD ENERGY REF802080","-1028.75","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"16/03/2025","FPO","FPO CASTLEGATE PROPERTY REF414183","-10013.96","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"19/03/2025","DD","DD KESTREL INSURANCE REF671229","-1762.97","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"19/03/2025","FPI","FPI FENWICK & PARTNERS REF159321","7721.65","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"21/03/2025","FPO","FPO BRAMBLE LOGISTICS REF715392","-10991.56","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"21/03/2025","BP","BP IRONBRIDGE TOOLING REF484377","-11377.77","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"22/03/2025","FPI","FPI OSPREY LEASING REF245255","13055.68","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"22/03/2025","FPO","FPO OSPREY LEASING REF496961","-4438.26","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"26/03/2025","TFR","TFR FENWICK & PARTNERS REF530693","13181.03","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"29/03/2025","FPO","FPO HARBOURLIGHT IT REF666104","-12577.37","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"30/03/2025","CR","CR DELPHINIUM MEDIA REF404553","3018.69","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"31/03/2025","TFR","TFR NORTHGATE CLEANING REF929098","10766.39","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
"31/03/2025","SO","SO BRAMBLE LOGISTICS REF974799","-9067.51","LEDGERBENCH DEMO LTD","17-48-24 34017995","acct-2026400003-3"
 

Ground truth

Public here because the benchmark is open; it is the model's prompt path that can never reach these values, not human readers.

AccountClosing balance
acct-2026400003-1−£42,248.81
acct-2026400003-2£231,961.78
acct-2026400003-3£154,296.90

Recorded runs on this case

  • exactSingle prompt2 steps · 13,926 tokens · Confidence high

    Model claude-sonnet-4-6Measured 2026-08-20Bench v1.0Run 11eaa71b2d02Commit 3d38c30

  • exactAgent with tools22 steps · 67,180 tokens · Confidence high

    Model claude-sonnet-4-6Measured 2026-08-20Bench v1.0Run f140aa1e57f4Commit 384d72d

Step through any of these on the demo page.