Gurobi 5.0.1 (linux64) logging started Sun Dec 9 06:11:50 2012 Optimize a model with 3000 rows, 2970 columns and 11336 nonzeros Presolve removed 136 rows and 17 columns Presolve time: 0.02s Presolved: 2864 rows, 2953 columns, 11052 nonzeros Variable types: 2777 continuous, 176 integer (176 binary) Root relaxation: objective 6.200564e+04, 291 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 62005.6384 0 13 - 62005.6384 - - 0s H 0 0 63255.000000 62005.6384 1.98% - 0s H 0 0 62925.000000 62005.6384 1.46% - 0s 0 0 62062.4985 0 24 62925.0000 62062.4985 1.37% - 0s 0 0 62070.3451 0 24 62925.0000 62070.3451 1.36% - 0s 0 2 62075.9539 0 24 62925.0000 62075.9539 1.35% - 0s H 21 18 62633.193548 62164.6180 0.75% 4.0 0s H 22 19 62614.978495 62164.6180 0.72% 3.9 0s * 25 18 24 62435.000000 62164.6180 0.43% 4.1 0s H 54 31 62421.000000 62181.2186 0.38% 3.8 0s * 188 28 15 62411.000000 62314.8004 0.15% 3.7 0s Cutting planes: Gomory: 6 Flow cover: 6 Explored 235 nodes (1146 simplex iterations) in 0.30 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.241100000000e+04, best bound 6.240594803313e+04, gap 0.0081%