Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:34:03 2013 Optimize a model with 660 rows, 36060 columns and 72060 nonzeros Presolve time: 0.05s Presolved: 660 rows, 36060 columns, 72060 nonzeros Variable types: 36000 continuous, 60 integer (60 binary) Root relaxation: objective 5.996583e+04, 1302 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 59965.8295 0 9 - 59965.8295 - - 0s H 0 0 63461.000000 59965.8295 5.51% - 0s H 0 0 61262.000000 59965.8295 2.12% - 0s 0 0 60597.0676 0 6 61262.0000 60597.0676 1.09% - 0s 0 0 60693.7310 0 5 61262.0000 60693.7310 0.93% - 0s 0 0 60697.4337 0 5 61262.0000 60697.4337 0.92% - 0s 0 0 60699.5751 0 6 61262.0000 60699.5751 0.92% - 0s 0 0 60701.5779 0 4 61262.0000 60701.5779 0.91% - 0s 0 0 60702.2347 0 4 61262.0000 60702.2347 0.91% - 0s 0 0 60702.2347 0 9 61262.0000 60702.2347 0.91% - 0s 0 0 60702.2347 0 6 61262.0000 60702.2347 0.91% - 0s 0 0 60702.2347 0 6 61262.0000 60702.2347 0.91% - 1s 0 0 60702.2347 0 4 61262.0000 60702.2347 0.91% - 1s 0 0 60702.2347 0 6 61262.0000 60702.2347 0.91% - 1s 0 0 60702.2347 0 4 61262.0000 60702.2347 0.91% - 1s 0 0 60702.2347 0 4 61262.0000 60702.2347 0.91% - 1s 0 2 60721.2347 0 4 61262.0000 60721.2347 0.88% - 1s H 6 4 61074.484848 60917.2038 0.26% 76.7 1s * 11 5 9 60972.000000 60923.2201 0.08% 51.3 1s Cutting planes: Implied bound: 134 Flow cover: 8 Explored 16 nodes (4056 simplex iterations) in 1.75 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.097200000000e+04, best bound 6.097200000000e+04, gap 0.0%