Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:26:33 2013 Optimize a model with 64 rows, 2110 columns and 24118 nonzeros Presolve removed 22 rows and 72 columns Presolve time: 0.09s Presolved: 42 rows, 2038 columns, 22074 nonzeros Variable types: 2020 continuous, 18 integer (18 binary) Root relaxation: objective 3.881594e+03, 21 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3881.59364 0 7 - 3881.59364 - - 0s 0 0 3881.86365 0 7 - 3881.86365 - - 0s 0 0 3882.32838 0 7 - 3882.32838 - - 0s 0 0 3882.64485 0 7 - 3882.64485 - - 0s 0 0 3883.52590 0 7 - 3883.52590 - - 0s 0 0 3883.52590 0 7 - 3883.52590 - - 0s H 0 0 3895.3327841 3883.52590 0.30% - 0s 0 0 3893.87054 0 3 3895.33278 3893.87054 0.04% - 0s 0 0 3893.87560 0 5 3895.33278 3893.87560 0.04% - 0s 0 0 3893.88105 0 5 3895.33278 3893.88105 0.04% - 0s 0 0 3893.88185 0 3 3895.33278 3893.88185 0.04% - 0s 0 0 3893.88196 0 5 3895.33278 3893.88196 0.04% - 0s 0 0 3893.89645 0 3 3895.33278 3893.89645 0.04% - 0s 0 2 3893.89676 0 3 3895.33278 3893.89676 0.04% - 0s * 2 2 2 3893.9001087 3893.89676 0.00% 3.5 0s Cutting planes: Implied bound: 1 Flow cover: 3 Explored 3 nodes (183 simplex iterations) in 0.25 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.893900108683e+03, best bound 3.893896755234e+03, gap 0.0001%