Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:23:26 2012 Optimize a model with 4886 rows, 756 columns and 15280 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.07s Presolved: 4911 rows, 754 columns, 21117 nonzeros Variable types: 0 continuous, 754 integer (754 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.818182e+00, 5691 iterations, 0.38 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.81818 0 521 27.00000 3.81818 85.9% - 0s 0 0 6.00000 0 34 27.00000 6.00000 77.8% - 1s H 0 0 20.0000000 6.00000 70.0% - 1s H 0 0 13.0000000 6.00000 53.8% - 1s H 0 0 7.0000000 6.00000 14.3% - 1s 0 0 6.00000 0 20 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 75 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 73 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 60 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 78 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 66 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 58 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 73 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 33 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 64 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 39 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 51 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 65 7.00000 6.00000 14.3% - 1s 0 0 6.00000 0 65 7.00000 6.00000 14.3% - 2s 0 2 6.00000 0 65 7.00000 6.00000 14.3% - 2s Cutting planes: Zero half: 32 Explored 17 nodes (17866 simplex iterations) in 2.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%