Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:35:39 2012 Optimize a model with 555 rows, 150 columns and 1110 nonzeros Presolve removed 98 rows and 2 columns Presolve time: 0.00s Presolved: 457 rows, 148 columns, 971 nonzeros Variable types: 0 continuous, 148 integer (148 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 6.400000e+01, 191 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64.00000 0 122 46.00000 64.00000 39.1% - 0s H 0 0 47.0000000 64.00000 36.2% - 0s 0 0 62.00000 0 141 47.00000 62.00000 31.9% - 0s 0 0 61.48403 0 146 47.00000 61.48403 30.8% - 0s H 0 0 49.0000000 61.48403 25.5% - 0s H 0 0 50.0000000 61.48403 23.0% - 0s 0 0 60.54332 0 146 50.00000 60.54332 21.1% - 0s 0 0 60.00153 0 146 50.00000 60.00153 20.0% - 0s 0 0 59.80716 0 148 50.00000 59.80716 19.6% - 0s 0 0 59.47193 0 148 50.00000 59.47193 18.9% - 0s 0 0 59.37054 0 148 50.00000 59.37054 18.7% - 0s 0 0 59.30231 0 148 50.00000 59.30231 18.6% - 0s 0 0 59.22049 0 148 50.00000 59.22049 18.4% - 0s 0 0 59.14231 0 147 50.00000 59.14231 18.3% - 0s 0 0 59.06389 0 147 50.00000 59.06389 18.1% - 0s H 0 0 52.0000000 59.06389 13.6% - 0s 0 0 58.97070 0 147 52.00000 58.97070 13.4% - 0s 0 0 58.92473 0 147 52.00000 58.92473 13.3% - 0s 0 0 58.92473 0 147 52.00000 58.92473 13.3% - 0s 0 2 58.92261 0 147 52.00000 58.92261 13.3% - 0s * 147 28 6 54.0000000 57.41109 6.32% 38.4 0s Cutting planes: Gomory: 1 Zero half: 163 Explored 399 nodes (15555 simplex iterations) in 0.67 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.400000000000e+01, best bound 5.400000000000e+01, gap 0.0%