The summit is expected to serve as a half time for the current European Semester, which started in November 2012 and in which Slovenia has been listed among problematic countries in need of a thorough check-up.

The EU's winter forecast puts Slovenia's 2012 budget deficit at 5.1% and projects a 2% GDP contraction, while the country is obliged to curb budget deficit below 3% of GDP this year.

On Friday, when EU leaders will focus on foreign policy issues, Slovenia will try to get the European Council to formally welcome the memorandum signed on Monday by Janša and Croatian PM Zoran Milanović on the issue of the defunct LB bank, which is to clear the way for the ratification of Croatia's EU Accession Treaty in Slovenia.

Such a move would make the memorandum - in which the countries pledged to resolve the Yugoslav-era savings deposits issue as a matter of succession - part of EU documents, which Slovenia deems an additional guarantee that it will be respected.

Although Council President Herman Van Rompuy has congratulated the two prime ministers on the memorandum and some EU leaders have also lauded the solution, it remains unclear whether the welcoming of the memorandum will be among the conclusions of the EU summit.