The Info1 corpus consists of faulty spreadsheets of two exercises submitted by civil engineering students as part of an Excel course.
One exercise is the statics computation for single-span beams, the other the calculation of the bending moment for a two-span beam.
The computations used in these spreadsheets contain complex operations, such as long formulas with many references and/or operations and the spreadsheets have a high number of copied formula cells.  Each spreadsheet has between 500 and 3,000 formula cells.
The corpus can be downloaded here. A detailed description of this corpus can be found here. If you want to cite this corpus, please use the following bibtex entry.
@inproceedings{GetznerHW17,
  author    = {Elisabeth Getzner and
               Birgit Hofer and
               Franz Wotawa},
  title     = {Improving Spectrum-Based Fault Localization for Spreadsheet Debugging},
  booktitle = {2017 {IEEE} International Conference on Software Quality, Reliability
               and Security ({QRS})},
  pages     = {102--113},
  year      = {2017},
  doi       = {10.1109/QRS.2017.21}
}