Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:55:26 2012 Optimize a model with 692 rows, 167 columns and 1384 nonzeros Presolve removed 127 rows and 0 columns Presolve time: 0.00s Presolved: 565 rows, 167 columns, 1210 nonzeros Variable types: 0 continuous, 167 integer (167 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 7.000000e+01, 311 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 70.00000 0 132 52.00000 70.00000 34.6% - 0s 0 0 68.69508 0 163 52.00000 68.69508 32.1% - 0s H 0 0 55.0000000 68.69508 24.9% - 0s 0 0 67.32242 0 165 55.00000 67.32242 22.4% - 0s 0 0 66.23899 0 165 55.00000 66.23899 20.4% - 0s 0 0 65.83721 0 166 55.00000 65.83721 19.7% - 0s 0 0 65.55331 0 161 55.00000 65.55331 19.2% - 0s 0 0 65.31942 0 166 55.00000 65.31942 18.8% - 0s 0 0 65.11569 0 165 55.00000 65.11569 18.4% - 0s 0 0 64.98731 0 167 55.00000 64.98731 18.2% - 0s 0 0 64.90811 0 167 55.00000 64.90811 18.0% - 0s 0 0 64.82060 0 165 55.00000 64.82060 17.9% - 0s 0 0 64.78294 0 166 55.00000 64.78294 17.8% - 0s 0 0 64.78294 0 165 55.00000 64.78294 17.8% - 0s 0 2 64.78133 0 164 55.00000 64.78133 17.8% - 0s * 17 15 14 56.0000000 64.78133 15.7% 57.0 0s H 27 16 57.0000000 64.69402 13.5% 58.4 0s * 457 130 18 58.0000000 62.31991 7.45% 43.5 0s 616 160 62.03068 14 163 58.00000 62.03068 6.95% 45.8 5s * 2169 46 23 59.0000000 60.10000 1.86% 38.2 7s Cutting planes: Gomory: 4 Zero half: 74 Explored 2220 nodes (84645 simplex iterations) in 7.59 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.900000000000e+01, best bound 5.900000000000e+01, gap 0.0%