Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:47:05 2013 Optimize a model with 1160 rows, 3030 columns and 9050 nonzeros Presolve removed 10 rows and 10 columns Presolve time: 0.21s Presolved: 1150 rows, 3020 columns, 8040 nonzeros Variable types: 2020 continuous, 1000 integer (1000 binary) Root relaxation: objective 1.997658e+04, 128 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 19976.5790 0 4 - 19976.5790 - - 0s 0 0 20015.4037 0 4 - 20015.4037 - - 0s 0 0 20026.7390 0 4 - 20026.7390 - - 0s 0 0 20029.7588 0 5 - 20029.7588 - - 0s 0 0 20037.9437 0 4 - 20037.9437 - - 0s 0 0 20039.6507 0 5 - 20039.6507 - - 0s 0 0 20040.7476 0 6 - 20040.7476 - - 0s 0 0 20044.4404 0 7 - 20044.4404 - - 0s 0 0 20045.9290 0 7 - 20045.9290 - - 0s 0 0 20046.8920 0 8 - 20046.8920 - - 0s 0 0 20048.3884 0 6 - 20048.3884 - - 0s 0 0 20048.5594 0 11 - 20048.5594 - - 0s 0 0 20048.6598 0 9 - 20048.6598 - - 0s 0 0 20048.8762 0 12 - 20048.8762 - - 0s 0 0 20048.8762 0 12 - 20048.8762 - - 0s 0 2 20048.8762 0 12 - 20048.8762 - - 0s * 21 7 11 20163.099852 20157.5383 0.03% 10.5 0s * 26 6 13 20159.734650 20157.6308 0.01% 9.1 0s * 27 3 14 20158.445957 20157.6308 0.00% 8.9 0s Cutting planes: Gomory: 2 Implied bound: 26 Flow cover: 5 Explored 28 nodes (578 simplex iterations) in 0.88 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.015844595680e+04, best bound 2.015763082231e+04, gap 0.0040%