Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:42:21 2012 Optimize a model with 915 rows, 183 columns and 1830 nonzeros Presolve removed 225 rows and 0 columns Presolve time: 0.01s Presolved: 690 rows, 183 columns, 1552 nonzeros Variable types: 0 continuous, 183 integer (183 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 7.030233e+01, 430 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 70.30233 0 179 45.00000 70.30233 56.2% - 0s H 0 0 50.0000000 70.30233 40.6% - 0s 0 0 69.12584 0 181 50.00000 69.12584 38.3% - 0s 0 0 68.31558 0 179 50.00000 68.31558 36.6% - 0s H 0 0 52.0000000 68.31558 31.4% - 0s 0 0 67.96619 0 180 52.00000 67.96619 30.7% - 0s 0 0 67.40564 0 182 52.00000 67.40564 29.6% - 0s 0 0 67.10685 0 181 52.00000 67.10685 29.1% - 0s 0 0 66.85968 0 181 52.00000 66.85968 28.6% - 0s 0 0 66.67362 0 181 52.00000 66.67362 28.2% - 0s 0 0 66.47555 0 181 52.00000 66.47555 27.8% - 0s 0 0 66.41178 0 182 52.00000 66.41178 27.7% - 0s 0 0 66.36445 0 182 52.00000 66.36445 27.6% - 0s 0 0 66.29875 0 181 52.00000 66.29875 27.5% - 0s H 0 0 53.0000000 66.29875 25.1% - 0s 0 0 66.11815 0 181 53.00000 66.11815 24.8% - 0s 0 0 66.02788 0 182 53.00000 66.02788 24.6% - 0s 0 0 65.98045 0 182 53.00000 65.98045 24.5% - 0s 0 0 65.97804 0 182 53.00000 65.97804 24.5% - 0s 0 0 65.97804 0 182 53.00000 65.97804 24.5% - 0s 0 2 65.97681 0 182 53.00000 65.97681 24.5% - 0s H 16 16 54.0000000 65.97681 22.2% 73.8 0s H 217 120 55.0000000 64.76404 17.8% 54.3 0s H 298 142 56.0000000 64.22512 14.7% 54.6 1s 613 294 59.69255 15 183 56.00000 63.40651 13.2% 55.3 5s 2242 902 58.88571 23 138 56.00000 62.33333 11.3% 48.6 10s 5152 1999 59.60000 25 133 56.00000 61.00000 8.93% 39.4 15s * 5652 1742 27 57.0000000 60.87500 6.80% 38.7 16s 7853 1845 59.26531 27 132 57.00000 60.13208 5.49% 36.7 20s 12220 952 cutoff 35 57.00000 58.84906 3.24% 33.6 25s Cutting planes: Gomory: 8 Clique: 1 Zero half: 74 Explored 13599 nodes (436787 simplex iterations) in 25.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%