Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:40:22 2012 Optimize a model with 597 rows, 157 columns and 1194 nonzeros Presolve removed 112 rows and 0 columns Presolve time: 0.00s Presolved: 485 rows, 157 columns, 1040 nonzeros Variable types: 0 continuous, 157 integer (157 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 6.562500e+01, 262 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 65.62500 0 140 51.00000 65.62500 28.7% - 0s 0 0 64.00000 0 141 51.00000 64.00000 25.5% - 0s 0 0 63.56122 0 155 51.00000 63.56122 24.6% - 0s H 0 0 53.0000000 63.56122 19.9% - 0s 0 0 62.48366 0 155 53.00000 62.48366 17.9% - 0s 0 0 62.18607 0 157 53.00000 62.18607 17.3% - 0s 0 0 62.07825 0 156 53.00000 62.07825 17.1% - 0s 0 0 61.91404 0 156 53.00000 61.91404 16.8% - 0s 0 0 61.67214 0 156 53.00000 61.67214 16.4% - 0s 0 0 61.50526 0 155 53.00000 61.50526 16.0% - 0s 0 0 61.42943 0 154 53.00000 61.42943 15.9% - 0s 0 0 61.18639 0 154 53.00000 61.18639 15.4% - 0s 0 0 61.09366 0 153 53.00000 61.09366 15.3% - 0s 0 0 61.03849 0 152 53.00000 61.03849 15.2% - 0s 0 0 61.02308 0 153 53.00000 61.02308 15.1% - 0s 0 0 61.02308 0 151 53.00000 61.02308 15.1% - 0s 0 2 61.01859 0 151 53.00000 61.01859 15.1% - 0s H 18 18 54.0000000 60.58333 12.2% 55.1 0s H 65 29 55.0000000 60.23382 9.52% 36.4 0s * 304 73 13 56.0000000 59.21875 5.75% 33.6 0s Cutting planes: Gomory: 1 Zero half: 136 Explored 670 nodes (21941 simplex iterations) in 0.89 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.600000000000e+01, best bound 5.600000000000e+01, gap 0.0%