Negotiators have not been able to move closer to a final deal that would end the separation of Cyprus into a Greek and a Turkish side after 40 years, the Greek Cypriot side said on the second day of talks in Geneva.
"We are as far removed from a solution as we are from a non-solution. Difficult topics are being discussed," said Nikos Christodoulides, government spokesman for the Greek side of the Mediterranean island.
The Greek and Turkish leaders of Cyprus - Nicos Anastasiades and Mustafa Akinci - discussed the economic costs of a reunification and how a future federal Cyprus will be governed.
However, Greek and Turkish Cypriot media reported that both leaders remain apart on the issue of the presidency of the reunited country.
In addition, the presence of troops from neighbouring Turkey on the island is also unresolved.
Greek Cypriots want these troops to leave, while the Turkish community wants Ankara to remain their protector, with a military presence on Cyprus.
A breakthrough on this issue was "not in sight" at the moment, a Cypriot diplomat told dpa.
Both sides have been conducting talks for 19 months.
Anastasiades and Akinci are scheduled to hold bilateral meetings until Wednesday. On Thursday, Greece, Turkey and Britain - Cyprus' former colonial power - are set to join them to negotiate the external security of Cyprus.