[bugfix] fixed exctrace pct from parsed formula

atms-api/src/main/java/pwc/taxtech/atms/vat/service/impl/ReportGeneratorImpl.java

@@ -533,8 +533,8 @@ public class ReportGeneratorImpl extends VatAbstractService implements ReportGen
                     byte[] parsedFormulaBytes = parsedFormula.getBytes();
                     Integer begin = null;
 
-                    for (int i = 0; i < parsedFormulaBytes.length - 3; i++) {
-                        if (parsedFormulaBytes[i] == 'P' && parsedFormulaBytes[i + 1] == 'C'
+                    for (int i = 0; i < parsedFormulaBytes.length; i++) {
+                        if (i < parsedFormulaBytes.length - 3 && parsedFormulaBytes[i] == 'P' && parsedFormulaBytes[i + 1] == 'C'
                                 && parsedFormulaBytes[i + 2] == 'T' && parsedFormulaBytes[i + 3] == '(') {
                             begin = i;
                         } else if (parsedFormulaBytes[i] == ')' && begin != null) {