Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:54:40 2012 Optimize a model with 235 rows, 139 columns and 724 nonzeros Presolve time: 0.00s Presolved: 235 rows, 139 columns, 724 nonzeros Variable types: 0 continuous, 139 integer (139 binary) Found heuristic solution: objective 61.0000000 Root relaxation: objective 0.000000e+00, 43 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 22 61.00000 0.00000 100% - 0s H 0 0 56.0000000 0.00000 100% - 0s 0 0 0.55000 0 23 56.00000 0.55000 99.0% - 0s 0 0 1.14935 0 25 56.00000 1.14935 97.9% - 0s 0 0 1.31169 0 25 56.00000 1.31169 97.7% - 0s 0 0 1.40909 0 25 56.00000 1.40909 97.5% - 0s 0 0 1.40909 0 25 56.00000 1.40909 97.5% - 0s 0 0 1.41998 0 29 56.00000 1.41998 97.5% - 0s 0 0 1.50000 0 25 56.00000 1.50000 97.3% - 0s 0 0 1.50000 0 25 56.00000 1.50000 97.3% - 0s 0 0 1.50000 0 25 56.00000 1.50000 97.3% - 0s 0 0 1.50000 0 25 56.00000 1.50000 97.3% - 0s 0 2 1.57639 0 25 56.00000 1.57639 97.2% - 0s * 25 20 14 55.0000000 7.35664 86.6% 30.6 0s * 158 93 12 54.0000000 16.87895 68.7% 25.4 0s H 187 113 52.0000000 18.72500 64.0% 25.9 0s * 216 112 14 51.0000000 18.75000 63.2% 24.0 0s * 359 161 12 50.0000000 22.80000 54.4% 23.7 0s * 372 166 14 49.0000000 22.83333 53.4% 23.5 0s * 376 160 14 48.0000000 22.83333 52.4% 23.3 0s * 1118 150 23 46.0000000 29.50000 35.9% 21.2 0s Cutting planes: Gomory: 3 Zero half: 3 Explored 2037 nodes (37410 simplex iterations) in 0.94 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%