“We will seek the contribution of our partners in helping toward the lightening of the debt,” Mr. Staikouras said. Greece’s debt is 321 billion euros.

Greece will continue to receive payments from the second bailout until next spring, when talks are expected to begin with international creditors on a potential third bailout. That aid would be much smaller than the first two rounds, to cover an estimated financing gap of 11 billion euros for the next two years.

The country has gradually been paying off its debts from an account opened last year at the Bank of Greece, and will continue to do so after it returns to international bond markets in 2014 or 2015. But given the overwhelming size of Greece’s debt, about 175 percent of its total economy, it remained unclear when Greece will be able to stop paying off what it owes with borrowed money.

Euro zone officials, in particular those in Germany, which has contributed the largest share to Greece’s bailouts, have repeatedly rejected the prospect of a second debt loss for Greece’s creditors after a write-down of privately held Greek debt last year. Other relief has not been ruled out, including a further reduction in interest rates and an extension on maturities on loans.

The International Monetary Fund has been more open to a possible loss to make Greece’s debt sustainable. And many prominent economic specialists have expressed doubt there is any other viable solution for Greece.

In an interview with Der Spiegel of Germany published on Monday, the billionaire investor George Soros said there was no other choice. “Everyone knows that Greece will never be able to pay off its debts,” he said. Mr. Soros added that private investors would return to Greece only if the “official sector” eased some of its demands.

Talks with troika officials will resume next week on the progress of Greek economic overhaul efforts, including what to do about the financing gap of 11 billion euros. After the troika envoys suggest amendments to the draft budget and issue their next economic review next month, the budget will go to a vote in the Greek Parliament.