Gurobi 5.0.1 (linux64) logging started Fri Nov 16 02:25:08 2012 Optimize a model with 8223 rows, 1056 columns and 25566 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.09s Presolved: 8221 rows, 1054 columns, 27500 nonzeros Variable types: 0 continuous, 1054 integer (1054 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 3.463415e+00, 6021 iterations, 0.39 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.46341 0 946 32.00000 3.46341 89.2% - 0s 0 0 5.00000 0 60 32.00000 5.00000 84.4% - 1s H 0 0 27.0000000 5.00000 81.5% - 1s H 0 0 9.0000000 5.00000 44.4% - 1s 0 0 5.33333 0 125 9.00000 5.33333 40.7% - 2s 0 0 7.00000 0 113 9.00000 7.00000 22.2% - 2s 0 0 7.00000 0 163 9.00000 7.00000 22.2% - 2s 0 0 7.00000 0 74 9.00000 7.00000 22.2% - 3s H 0 0 8.0000000 7.00000 12.5% - 3s 0 0 7.00000 0 65 8.00000 7.00000 12.5% - 3s 0 0 7.00000 0 71 8.00000 7.00000 12.5% - 3s 0 0 7.00000 0 75 8.00000 7.00000 12.5% - 3s 0 0 7.00000 0 61 8.00000 7.00000 12.5% - 3s 0 0 7.00000 0 18 8.00000 7.00000 12.5% - 4s 0 0 7.00000 0 43 8.00000 7.00000 12.5% - 4s 0 0 7.00000 0 104 8.00000 7.00000 12.5% - 4s 0 0 7.00000 0 86 8.00000 7.00000 12.5% - 4s 0 2 7.00000 0 86 8.00000 7.00000 12.5% - 4s 4 4 7.00000 0 90 8.00000 7.00000 12.5% 126 5s Explored 9 nodes (38167 simplex iterations) in 5.63 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%