Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:59:52 2012 Optimize a model with 759 rows, 170 columns and 1518 nonzeros Presolve removed 196 rows and 0 columns Presolve time: 0.00s Presolved: 563 rows, 170 columns, 1259 nonzeros Variable types: 0 continuous, 170 integer (170 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 6.650000e+01, 376 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 66.50000 0 129 46.00000 66.50000 44.6% - 0s 0 0 65.64706 0 166 46.00000 65.64706 42.7% - 0s H 0 0 51.0000000 65.64706 28.7% - 0s 0 0 64.73151 0 167 51.00000 64.73151 26.9% - 0s 0 0 63.90892 0 165 51.00000 63.90892 25.3% - 0s 0 0 63.58647 0 164 51.00000 63.58647 24.7% - 0s 0 0 63.44914 0 167 51.00000 63.44914 24.4% - 0s 0 0 63.28150 0 165 51.00000 63.28150 24.1% - 0s 0 0 63.05506 0 168 51.00000 63.05506 23.6% - 0s H 0 0 54.0000000 63.05506 16.8% - 0s 0 0 62.91443 0 165 54.00000 62.91443 16.5% - 0s 0 0 62.80070 0 165 54.00000 62.80070 16.3% - 0s 0 0 62.67232 0 167 54.00000 62.67232 16.1% - 0s 0 0 62.62830 0 168 54.00000 62.62830 16.0% - 0s 0 0 62.58200 0 169 54.00000 62.58200 15.9% - 0s H 0 0 55.0000000 62.58200 13.8% - 0s 0 0 62.54081 0 169 55.00000 62.54081 13.7% - 0s 0 0 62.48152 0 168 55.00000 62.48152 13.6% - 0s 0 0 62.39287 0 168 55.00000 62.39287 13.4% - 0s 0 0 62.33345 0 167 55.00000 62.33345 13.3% - 0s 0 0 62.24683 0 167 55.00000 62.24683 13.2% - 0s 0 0 62.23672 0 167 55.00000 62.23672 13.2% - 0s 0 0 62.23672 0 166 55.00000 62.23672 13.2% - 0s 0 2 62.23202 0 166 55.00000 62.23202 13.1% - 0s 703 223 cutoff 31 55.00000 59.50000 8.18% 58.3 5s H 2129 327 56.0000000 58.64368 4.72% 43.9 7s Cutting planes: Gomory: 9 Zero half: 71 Explored 2689 nodes (110600 simplex iterations) in 8.49 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%