Program: 93765
Project: 93765
Buggy source:
public Class<?> loadClass(String className) throws ClassNotFoundException {
  if (packageNameToCertificateMap.isEmpty())   return null;
  if (hasBeenWipedOut)   return null;
  String packageName=className.substring(0,className.lastIndexOf('.'));
  String containerPath;
synchronized (packageNameToContainerPathMap) {
    containerPath=packageNameToContainerPathMap.get(packageName);
  }
  if (containerPath == null)   return null;
  if (performLazyEvaluation) {
    boolean alreadyVerifiedPackageName;
synchronized (lazyAlreadyVerifiedPackageNameSet) {
      alreadyVerifiedPackageName=lazyAlreadyVerifiedPackageNameSet.contains(packageName);
    }
    if (alreadyVerifiedPackageName) {
      return mDexClassLoader.loadClass(className);
    }
 else {
      String rootPackageNameWithCertificate=mPackageNameTrie.getPackageNameWithAssociatedCertificate(packageName);
      X509Certificate verifiedCertificate=null;
      if (!rootPackageNameWithCertificate.isEmpty()) {
        verifiedCertificate=importCertificateFromPackageName(packageName);
      }
      if (verifiedCertificate != null) {
        boolean signatureCheckIsSuccessful=verifyContainerSignatureAgainstCertificate(containerPath,verifiedCertificate);
        if (signatureCheckIsSuccessful) {
synchronized (lazyAlreadyVerifiedPackageNameSet) {
            Iterator<String> packageNamesIterator=packageNameToContainerPathMap.keySet().iterator();
            while (packageNamesIterator.hasNext()) {
              String currentPackageName=packageNamesIterator.next();
              if (packageNameToContainerPathMap.get(currentPackageName).equals(containerPath)) {
                lazyAlreadyVerifiedPackageNameSet.add(currentPackageName);
              }
            }
          }
          return mDexClassLoader.loadClass(className);
        }
        File containerToRemove=new File(containerPath);
        if (!containerToRemove.delete())         Log.i(TAG_SECURE_DEX_CLASS_LOADER,"String_Node_Str" + containerPath);
synchronized (packageNameToContainerPathMap) {
          Iterator<String> packageNamesIterator=packageNameToContainerPathMap.keySet().iterator();
          while (packageNamesIterator.hasNext()) {
            String currentPackageName=packageNamesIterator.next();
            if (packageNameToContainerPathMap.get(currentPackageName).equals(containerPath))             packageNamesIterator.remove();
          }
        }
        return null;
      }
      return null;
    }
  }
  return mDexClassLoader.loadClass(className);
}

Fixed version (ground truth):
public Class<?> loadClass(String className) throws ClassNotFoundException {
  if (packageNameToCertificateMap.isEmpty())   return null;
  if (hasBeenWipedOut)   return null;
  String packageName=className.substring(0,className.lastIndexOf('.'));
  String containerPath;
synchronized (packageNameToContainerPathMap) {
    containerPath=packageNameToContainerPathMap.get(packageName);
  }
  if (containerPath == null)   return null;
  if (performLazyEvaluation) {
    boolean alreadyVerifiedPackageName;
synchronized (lazyAlreadyVerifiedPackageNameSet) {
      alreadyVerifiedPackageName=lazyAlreadyVerifiedPackageNameSet.contains(packageName);
    }
    if (alreadyVerifiedPackageName) {
      return mDexClassLoader.loadClass(className);
    }
 else {
      String rootPackageNameWithCertificate=mPackageNameTrie.getPackageNameWithAssociatedCertificate(packageName);
      X509Certificate verifiedCertificate=null;
      if (!rootPackageNameWithCertificate.isEmpty()) {
        verifiedCertificate=importCertificateFromPackageName(rootPackageNameWithCertificate);
      }
      if (verifiedCertificate != null) {
        boolean signatureCheckIsSuccessful=verifyContainerSignatureAgainstCertificate(containerPath,verifiedCertificate);
        if (signatureCheckIsSuccessful) {
synchronized (lazyAlreadyVerifiedPackageNameSet) {
            Iterator<String> packageNamesIterator=packageNameToContainerPathMap.keySet().iterator();
            while (packageNamesIterator.hasNext()) {
              String currentPackageName=packageNamesIterator.next();
              if (packageNameToContainerPathMap.get(currentPackageName).equals(containerPath)) {
                lazyAlreadyVerifiedPackageNameSet.add(currentPackageName);
              }
            }
          }
          return mDexClassLoader.loadClass(className);
        }
        File containerToRemove=new File(containerPath);
        if (!containerToRemove.delete())         Log.i(TAG_SECURE_DEX_CLASS_LOADER,"String_Node_Str" + containerPath);
synchronized (packageNameToContainerPathMap) {
          Iterator<String> packageNamesIterator=packageNameToContainerPathMap.keySet().iterator();
          while (packageNamesIterator.hasNext()) {
            String currentPackageName=packageNamesIterator.next();
            if (packageNameToContainerPathMap.get(currentPackageName).equals(containerPath))             packageNamesIterator.remove();
          }
        }
        return null;
      }
      return null;
    }
  }
  return mDexClassLoader.loadClass(className);
}