Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:31:47 2012 Optimize a model with 797 rows, 180 columns and 1594 nonzeros Presolve removed 153 rows and 0 columns Presolve time: 0.00s Presolved: 644 rows, 180 columns, 1396 nonzeros Variable types: 0 continuous, 180 integer (180 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 7.375000e+01, 369 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 73.75000 0 163 52.00000 73.75000 41.8% - 0s 0 0 72.15877 0 178 52.00000 72.15877 38.8% - 0s 0 0 71.53647 0 180 52.00000 71.53647 37.6% - 0s H 0 0 53.0000000 71.53647 35.0% - 0s H 0 0 54.0000000 71.53647 32.5% - 0s 0 0 70.54506 0 177 54.00000 70.54506 30.6% - 0s H 0 0 56.0000000 70.54506 26.0% - 0s H 0 0 58.0000000 70.54506 21.6% - 0s 0 0 70.15636 0 180 58.00000 70.15636 21.0% - 0s 0 0 69.92695 0 178 58.00000 69.92695 20.6% - 0s 0 0 69.57351 0 179 58.00000 69.57351 20.0% - 0s 0 0 69.42495 0 178 58.00000 69.42495 19.7% - 0s H 0 0 59.0000000 69.42495 17.7% - 0s 0 0 69.25072 0 179 59.00000 69.25072 17.4% - 0s 0 0 69.03169 0 179 59.00000 69.03169 17.0% - 0s 0 0 68.98406 0 180 59.00000 68.98406 16.9% - 0s H 0 0 60.0000000 68.98406 15.0% - 0s 0 0 68.79828 0 180 60.00000 68.79828 14.7% - 0s 0 0 68.70972 0 180 60.00000 68.70972 14.5% - 0s 0 0 68.56928 0 179 60.00000 68.56928 14.3% - 0s 0 0 68.50021 0 180 60.00000 68.50021 14.2% - 0s 0 0 68.47394 0 180 60.00000 68.47394 14.1% - 0s 0 0 68.47394 0 180 60.00000 68.47394 14.1% - 0s 0 2 68.47184 0 180 60.00000 68.47184 14.1% - 0s H 136 56 61.0000000 66.88609 9.65% 64.7 0s 609 189 62.91000 6 180 61.00000 65.38089 7.18% 53.1 5s 2000 346 cutoff 20 61.00000 64.07143 5.04% 47.8 10s Cutting planes: Gomory: 3 Zero half: 83 Explored 3271 nodes (137194 simplex iterations) in 12.60 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.100000000000e+01, best bound 6.100000000000e+01, gap 0.0%