brussels eu leaders offer ukraine close tie friday summit mean cement kiev tie west decline promise country could one day join bloc fight escalate ukraine industrial east eu leaders hold summit ukrainian president petro poroshenko five former soviet republics part tug-of-war russia influence trade cooperation summit statement also sign ukraine georgia moldova azerbaijan armenia belarus eu leaders agree european aspirations european choice partner code deep integration without offer membership ukraine oust russian-backed president february 2014 pro-european uprise want promise future membership eu world big trade bloc seek overcome entrench corruption economic neglect promise eu membership important symbolic say ukraine finance minister oleksandr danylyuk margins biennial summit country will pay high price tell reuters kiev fight russian-backed insurgency east see promise membership morale-boosting next step agree free-trade accord bloc win visa-free travel eu citizens eu leaders sympathetic kiev commission president jean-claude juncker say promise poroshenko formal study ukraine might join eu customs union summit chairman donald tusk former polish prime minister say would prefer word summit agreement ambitious without give detail leaders warn ukraine push hard part governments seek curb immigration face far-right political party home also ukraine fragile economy yet ready meet eu norms stubbornness good important thing guarantee enter eu stubborn reform say lithuania president dalia grybauskaite membership valuable beneficial ukraine say refer country need reform meet eu business health trade standards luxembourg prime minister xavier bettel echo position say right moment discuss future ukrainian membership european union back washington european union seek build out ring market democracies caucasus sahara without offer eu membership policy limit success far ukraine also unhappy group belarus russian ally whose authoritarian leader president alexander lukashenko attend summit friday despite invite first time leave summit poroshenko say expect breakthrough soon stall 600 million euro 712 million loan financial sector eu hold ukraine failure meet condition danylyuk tell reuters also saw next imf aid tranche come early next year wary reform slow ukraine move close elections 2019 eu imf governments use financial support push anti-corruption reform european commissioner johannes hahn oversee eu integration say ridiculous 1.5 million ukrainians sign wealth declarations register last year 100 people assess date danylyuk counter face campaign economic reform efforts powerful business group benefit corruption legal loopholes fight say vest interest like take money ukraine 's promise eu membership remain elusive