Program: 135993
Project: 135993
Buggy source:
/** 
 * Constructor for the position. For the offset and length for the proof and statement, first obtain the   {@link Location} from the syntax tree. For the proof, usethe location returned by  {@link ProofNode#getLocation()}, where the   {@link ProofNode} is obtained by {@link TheoremNode#getProof()}. For the statement, use the location returned by   {@link LevelNode#getLocation()}  for the {@link LevelNode} returned by {@link TheoremNode#getTheorem()}. To convert from the 4-int   {@link Location} to the offset and length, use {@link AdapterFactory#locationToRegion(IDocument,Location)} andthen use the offset and length for the returned region.
 * @param initProofOffset initial offset of the proof
 * @param initProofLength initial length of the proof
 * @param initStatementOffset initial offset of the statement of the theorem or stepfor which this is a proof
 * @param initStatementLength initial length of the statement of the theorem or stepfor which this is a proof
 * @param annotation {@link ProjectionAnnotation} that should be at this position
 * @param document
 */
public TLAProofPosition(int initProofOffset,int initProofLength,int initStatementOffset,int initStatementLength,ProjectionAnnotation annotation,IDocument document){
  IRegion region=alignRegion(new Region(initStatementOffset,initProofOffset + initProofLength - initStatementOffset),document);
  offset=region.getOffset();
  length=region.getLength();
  positionOfStatement=new Position(initStatementOffset,initStatementLength);
  positionOfProof=new Position(initProofOffset,initProofLength);
  this.annotation=annotation;
  try {
    document.addPosition(positionOfProof);
    document.addPosition(positionOfStatement);
  }
 catch (  BadLocationException e) {
    Activator.logError("String_Node_Str" + this,e);
  }
}

Fixed version (ground truth):
/** 
 * Constructor for the position. For the offset and length for the proof and statement, first obtain the   {@link Location} from the syntax tree. For the proof, usethe location returned by  {@link ProofNode#getLocation()}, where the   {@link ProofNode} is obtained by {@link TheoremNode#getProof()}. For initTheoremOffset, use the beginning of the location returned by   {@link TheoremNode#getLocation()}. For the end of the statement, use the end of the location returned by   {@link LevelNode#getLocation()} for the  {@link LevelNode} returned by {@link TheoremNode#getTheorem()}. To convert from the 4-int   {@link Location} to the offset and length, use {@link AdapterFactory#locationToRegion(IDocument,Location)} andthen use the offset and length for the returned region.
 * @param initProofOffset initial offset of the proof
 * @param initProofLength initial length of the proof
 * @param initTheoremOffset initial offset of the theorem or stepfor which this is a proof
 * @param initLengthToEndOfStatement initial length from initTheoremOffset to the end ofthe statement of the theorem
 * @param annotation {@link ProjectionAnnotation} that should be at this position
 * @param document
 */
public TLAProofPosition(int initProofOffset,int initProofLength,int initTheoremOffset,int initLengthToEndOfStatement,ProjectionAnnotation annotation,IDocument document){
  IRegion region=alignRegion(new Region(initTheoremOffset,initProofOffset + initProofLength - initTheoremOffset),document);
  offset=region.getOffset();
  length=region.getLength();
  positionOfStatement=new Position(initTheoremOffset,initLengthToEndOfStatement);
  positionOfProof=new Position(initProofOffset,initProofLength);
  this.annotation=annotation;
  try {
    document.addPosition(positionOfProof);
    document.addPosition(positionOfStatement);
  }
 catch (  BadLocationException e) {
    Activator.logError("String_Node_Str" + this,e);
  }
}