Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:48:34 2013 Optimize a model with 704 rows, 41024 columns and 81984 nonzeros Presolve time: 0.06s Presolved: 704 rows, 41024 columns, 81984 nonzeros Variable types: 40960 continuous, 64 integer (64 binary) Root relaxation: objective 6.782608e+04, 1481 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 67826.0820 0 9 - 67826.0820 - - 0s H 0 0 70092.000000 67826.0820 3.23% - 0s 0 0 68170.7429 0 10 70092.0000 68170.7429 2.74% - 0s H 0 0 69315.000000 68170.7429 1.65% - 0s 0 0 68271.8163 0 8 69315.0000 68271.8163 1.50% - 0s H 0 0 69172.000000 68271.8163 1.30% - 0s 0 0 68293.8380 0 6 69172.0000 68293.8380 1.27% - 0s H 0 0 69047.000000 68293.8380 1.09% - 0s 0 0 68297.2044 0 7 69047.0000 68297.2044 1.09% - 0s H 0 0 69013.000000 68297.2044 1.04% - 0s 0 0 68307.6653 0 6 69013.0000 68307.6653 1.02% - 0s 0 0 68311.3270 0 6 69013.0000 68311.3270 1.02% - 0s 0 0 68313.0689 0 6 69013.0000 68313.0689 1.01% - 0s H 0 0 68474.000000 68313.0689 0.24% - 0s 0 0 68314.0692 0 6 68474.0000 68314.0692 0.23% - 0s 0 0 68314.0692 0 9 68474.0000 68314.0692 0.23% - 1s 0 0 68314.0692 0 10 68474.0000 68314.0692 0.23% - 1s 0 0 68314.0692 0 8 68474.0000 68314.0692 0.23% - 1s 0 0 68314.0692 0 6 68474.0000 68314.0692 0.23% - 1s 0 0 68314.0692 0 6 68474.0000 68314.0692 0.23% - 1s 0 0 68314.0692 0 7 68474.0000 68314.0692 0.23% - 1s 0 0 68314.0692 0 7 68474.0000 68314.0692 0.23% - 1s 0 0 68314.0692 0 7 68474.0000 68314.0692 0.23% - 1s 0 0 68314.0692 0 8 68474.0000 68314.0692 0.23% - 1s 0 2 68315.7822 0 8 68474.0000 68315.7822 0.23% - 1s * 6 3 6 68387.000000 68349.4261 0.05% 26.7 1s Cutting planes: Implied bound: 110 Flow cover: 11 Explored 9 nodes (3437 simplex iterations) in 1.78 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.838700000000e+04, best bound 6.838700000000e+04, gap 0.0%