Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:59:40 2012 Optimize a model with 901 rows, 186 columns and 1802 nonzeros Presolve removed 199 rows and 0 columns Presolve time: 0.01s Presolved: 702 rows, 186 columns, 1545 nonzeros Variable types: 0 continuous, 186 integer (186 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 7.387500e+01, 360 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 73.87500 0 163 50.00000 73.87500 47.8% - 0s 0 0 72.13333 0 181 50.00000 72.13333 44.3% - 0s H 0 0 51.0000000 72.13333 41.4% - 0s 0 0 71.68239 0 184 51.00000 71.68239 40.6% - 0s 0 0 70.94698 0 185 51.00000 70.94698 39.1% - 0s 0 0 70.61994 0 184 51.00000 70.61994 38.5% - 0s 0 0 70.11042 0 185 51.00000 70.11042 37.5% - 0s 0 0 69.76830 0 185 51.00000 69.76830 36.8% - 0s 0 0 69.59800 0 184 51.00000 69.59800 36.5% - 0s 0 0 69.45081 0 184 51.00000 69.45081 36.2% - 0s 0 0 69.39361 0 185 51.00000 69.39361 36.1% - 0s 0 0 69.24015 0 185 51.00000 69.24015 35.8% - 0s 0 0 69.12747 0 183 51.00000 69.12747 35.5% - 0s 0 0 69.00123 0 184 51.00000 69.00123 35.3% - 0s 0 0 68.92057 0 185 51.00000 68.92057 35.1% - 0s 0 0 68.80043 0 186 51.00000 68.80043 34.9% - 0s H 0 0 53.0000000 68.80043 29.8% - 0s 0 0 68.69343 0 185 53.00000 68.69343 29.6% - 0s 0 0 68.67040 0 185 53.00000 68.67040 29.6% - 0s 0 0 68.67040 0 185 53.00000 68.67040 29.6% - 0s H 0 0 54.0000000 68.67040 27.2% - 0s 0 2 68.67040 0 185 54.00000 68.67040 27.2% - 0s H 66 52 55.0000000 68.59114 24.7% 62.4 0s 611 350 64.79455 14 185 55.00000 66.11140 20.2% 53.5 5s H 1790 823 56.0000000 65.52965 17.0% 48.8 9s 1872 876 62.50000 30 144 56.00000 65.47917 16.9% 48.5 10s * 3889 1918 37 57.0000000 64.28125 12.8% 41.3 13s 4598 2280 58.00000 35 110 57.00000 64.00000 12.3% 39.8 15s H 7353 2889 58.0000000 63.06250 8.73% 36.2 19s 7900 3017 60.37500 24 129 58.00000 62.94595 8.53% 35.9 20s 11807 3813 60.50000 33 121 58.00000 62.06962 7.02% 33.7 25s 16927 3989 59.20000 21 122 58.00000 61.29167 5.68% 31.6 30s 20992 3636 59.00000 36 100 58.00000 60.76923 4.77% 30.6 35s 26702 2210 cutoff 28 58.00000 60.00000 3.45% 29.3 40s Cutting planes: Gomory: 4 Zero half: 83 Explored 30736 nodes (861744 simplex iterations) in 42.76 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%