Program: 26574
Project: 26574
Buggy source:
@Override public void onProgressChanged(SeekBar seekBar,int progress,boolean fromUser){
  tvX.setText("String_Node_Str" + (mSeekBarX.getProgress() * 3 + 1));
  tvY.setText("String_Node_Str" + (mSeekBarY.getProgress()));
  ArrayList<String> xVals=new ArrayList<String>();
  for (int i=0; i < mSeekBarX.getProgress() + 1; i++) {
    xVals.add((i + 1990) + "String_Node_Str");
  }
  ArrayList<BarEntry> yVals1=new ArrayList<BarEntry>();
  ArrayList<BarEntry> yVals2=new ArrayList<BarEntry>();
  ArrayList<BarEntry> yVals3=new ArrayList<BarEntry>();
  float mult=mSeekBarY.getProgress() * 1000f;
  for (int i=0; i < mSeekBarX.getProgress(); i++) {
    float val=(float)(Math.random() * mult) + 3;
    yVals1.add(new BarEntry(val,i));
  }
  for (int i=0; i < mSeekBarX.getProgress(); i++) {
    float val=(float)(Math.random() * mult) + 3;
    yVals2.add(new BarEntry(val,i));
  }
  for (int i=0; i < mSeekBarX.getProgress(); i++) {
    float val=(float)(Math.random() * mult) + 3;
    yVals3.add(new BarEntry(val,i));
  }
  BarDataSet set1=new BarDataSet(yVals1,"String_Node_Str");
  set1.setColor(Color.rgb(104,241,175));
  BarDataSet set2=new BarDataSet(yVals2,"String_Node_Str");
  set2.setColor(Color.rgb(164,228,251));
  BarDataSet set3=new BarDataSet(yVals3,"String_Node_Str");
  set3.setColor(Color.rgb(242,247,158));
  ArrayList<BarDataSet> dataSets=new ArrayList<BarDataSet>();
  dataSets.add(set1);
  dataSets.add(set2);
  dataSets.add(set3);
  BarData data=new BarData(xVals,dataSets);
  data.setGroupSpace(80f);
  data.setValueTypeface(tf);
  mChart.setData(data);
  mChart.invalidate();
}

Fixed version (ground truth):
@Override public void onProgressChanged(SeekBar seekBar,int progress,boolean fromUser){
  tvX.setText("String_Node_Str" + (mSeekBarX.getProgress() * 3));
  tvY.setText("String_Node_Str" + (mSeekBarY.getProgress()));
  ArrayList<String> xVals=new ArrayList<String>();
  for (int i=0; i < mSeekBarX.getProgress(); i++) {
    xVals.add((i + 1990) + "String_Node_Str");
  }
  ArrayList<BarEntry> yVals1=new ArrayList<BarEntry>();
  ArrayList<BarEntry> yVals2=new ArrayList<BarEntry>();
  ArrayList<BarEntry> yVals3=new ArrayList<BarEntry>();
  float mult=mSeekBarY.getProgress() * 1000f;
  for (int i=0; i < mSeekBarX.getProgress(); i++) {
    float val=(float)(Math.random() * mult) + 3;
    yVals1.add(new BarEntry(val,i));
  }
  for (int i=0; i < mSeekBarX.getProgress(); i++) {
    float val=(float)(Math.random() * mult) + 3;
    yVals2.add(new BarEntry(val,i));
  }
  for (int i=0; i < mSeekBarX.getProgress(); i++) {
    float val=(float)(Math.random() * mult) + 3;
    yVals3.add(new BarEntry(val,i));
  }
  BarDataSet set1=new BarDataSet(yVals1,"String_Node_Str");
  set1.setColor(Color.rgb(104,241,175));
  BarDataSet set2=new BarDataSet(yVals2,"String_Node_Str");
  set2.setColor(Color.rgb(164,228,251));
  BarDataSet set3=new BarDataSet(yVals3,"String_Node_Str");
  set3.setColor(Color.rgb(242,247,158));
  ArrayList<BarDataSet> dataSets=new ArrayList<BarDataSet>();
  dataSets.add(set1);
  dataSets.add(set2);
  dataSets.add(set3);
  BarData data=new BarData(xVals,dataSets);
  data.setGroupSpace(80f);
  data.setValueTypeface(tf);
  mChart.setData(data);
  mChart.invalidate();
}