Gurobi 5.0.1 (linux64) logging started Tue Nov 20 14:48:33 2012 Optimize a model with 932 rows, 191 columns and 1864 nonzeros Presolve removed 232 rows and 0 columns Presolve time: 0.01s Presolved: 700 rows, 191 columns, 1562 nonzeros Variable types: 0 continuous, 191 integer (191 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 7.364286e+01, 447 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 73.64286 0 180 53.00000 73.64286 38.9% - 0s 0 0 72.50000 0 166 53.00000 72.50000 36.8% - 0s 0 0 71.97814 0 185 53.00000 71.97814 35.8% - 0s 0 0 71.12789 0 186 53.00000 71.12789 34.2% - 0s H 0 0 55.0000000 71.12789 29.3% - 0s 0 0 70.91187 0 187 55.00000 70.91187 28.9% - 0s 0 0 70.66352 0 189 55.00000 70.66352 28.5% - 0s 0 0 70.31526 0 188 55.00000 70.31526 27.8% - 0s 0 0 70.15088 0 188 55.00000 70.15088 27.5% - 0s H 0 0 56.0000000 70.15088 25.3% - 0s 0 0 70.03043 0 186 56.00000 70.03043 25.1% - 0s 0 0 69.92520 0 188 56.00000 69.92520 24.9% - 0s 0 0 69.83526 0 188 56.00000 69.83526 24.7% - 0s 0 0 69.77397 0 188 56.00000 69.77397 24.6% - 0s 0 0 69.76045 0 187 56.00000 69.76045 24.6% - 0s 0 0 69.70822 0 189 56.00000 69.70822 24.5% - 0s 0 0 69.62735 0 189 56.00000 69.62735 24.3% - 0s 0 0 69.61475 0 188 56.00000 69.61475 24.3% - 0s 0 0 69.59674 0 189 56.00000 69.59674 24.3% - 0s 0 0 69.59674 0 188 56.00000 69.59674 24.3% - 0s 0 2 69.59649 0 187 56.00000 69.59649 24.3% - 0s H 38 22 59.0000000 69.54468 17.9% 63.6 0s 611 289 60.93750 11 186 59.00000 67.24362 14.0% 54.3 5s H 1604 550 60.0000000 66.60000 11.0% 58.5 8s 1977 721 63.95296 22 146 60.00000 66.13817 10.2% 56.4 10s 3686 1300 cutoff 22 60.00000 64.90909 8.18% 50.2 15s 6039 1787 61.89744 22 137 60.00000 64.08571 6.81% 45.6 20s 8937 1930 61.42718 27 139 60.00000 63.33333 5.56% 42.3 25s 12375 1557 61.85000 30 129 60.00000 62.56250 4.27% 40.1 30s Cutting planes: Gomory: 6 Clique: 1 Zero half: 73 Explored 15853 nodes (599587 simplex iterations) in 34.93 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+01, best bound 6.000000000000e+01, gap 0.0%