Gurobi 5.0.1 (linux64) logging started Mon Feb 4 16:01:00 2013 Optimize a model with 63 rows, 49 columns and 168 nonzeros Presolve removed 21 rows and 21 columns Presolve time: 0.00s Presolved: 42 rows, 28 columns, 126 nonzeros Variable types: 7 continuous, 21 integer (21 binary) Found heuristic solution: objective 1082.0000000 Root relaxation: objective 3.410000e+02, 13 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 341.00000 0 9 1082.00000 341.00000 68.5% - 0s 0 0 471.03694 0 6 1082.00000 471.03694 56.5% - 0s 0 0 489.65992 0 7 1082.00000 489.65992 54.7% - 0s 0 0 496.16270 0 9 1082.00000 496.16270 54.1% - 0s 0 0 497.81131 0 9 1082.00000 497.81131 54.0% - 0s 0 0 497.81131 0 8 1082.00000 497.81131 54.0% - 0s 0 2 501.91746 0 8 1082.00000 501.91746 53.6% - 0s * 10 10 8 818.0000000 519.99193 36.4% 3.9 0s * 12 10 9 726.0000000 519.99193 28.4% 3.5 0s * 15 9 10 719.0000000 519.99193 27.7% 3.5 0s * 61 22 8 700.0000000 575.00000 17.9% 3.4 0s * 63 20 9 693.0000000 575.00000 17.0% 3.4 0s Cutting planes: Implied bound: 9 MIR: 16 Explored 115 nodes (347 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.930000000000e+02, best bound 6.930000000000e+02, gap 0.0%