Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:44:25 2012 Optimize a model with 855 rows, 183 columns and 1710 nonzeros Presolve removed 222 rows and 1 columns Presolve time: 0.01s Presolved: 633 rows, 182 columns, 1402 nonzeros Variable types: 0 continuous, 182 integer (182 binary) Found heuristic solution: objective 53.0000000 Root relaxation: objective 7.200000e+01, 427 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 72.00000 0 165 53.00000 72.00000 35.8% - 0s 0 0 71.35421 0 178 53.00000 71.35421 34.6% - 0s 0 0 70.91413 0 177 53.00000 70.91413 33.8% - 0s 0 0 70.52715 0 182 53.00000 70.52715 33.1% - 0s 0 0 70.29095 0 182 53.00000 70.29095 32.6% - 0s 0 0 70.01939 0 181 53.00000 70.01939 32.1% - 0s H 0 0 54.0000000 70.01939 29.7% - 0s 0 0 69.75748 0 180 54.00000 69.75748 29.2% - 0s 0 0 69.59688 0 180 54.00000 69.59688 28.9% - 0s 0 0 69.44836 0 180 54.00000 69.44836 28.6% - 0s 0 0 69.37625 0 181 54.00000 69.37625 28.5% - 0s 0 0 69.21453 0 176 54.00000 69.21453 28.2% - 0s 0 0 69.17247 0 175 54.00000 69.17247 28.1% - 0s 0 0 69.08435 0 181 54.00000 69.08435 27.9% - 0s 0 0 69.04561 0 181 54.00000 69.04561 27.9% - 0s 0 0 68.87090 0 181 54.00000 68.87090 27.5% - 0s H 0 0 55.0000000 68.87090 25.2% - 0s 0 0 68.73733 0 181 55.00000 68.73733 25.0% - 0s 0 0 68.67792 0 181 55.00000 68.67792 24.9% - 0s 0 0 68.62610 0 182 55.00000 68.62610 24.8% - 0s H 0 0 56.0000000 68.62610 22.5% - 0s 0 0 68.54256 0 182 56.00000 68.54256 22.4% - 0s 0 0 68.44476 0 180 56.00000 68.44476 22.2% - 0s 0 0 68.43109 0 181 56.00000 68.43109 22.2% - 0s 0 0 68.43109 0 181 56.00000 68.43109 22.2% - 0s H 0 0 57.0000000 68.43109 20.1% - 0s 0 2 68.42852 0 181 57.00000 68.42852 20.1% - 0s H 14 14 58.0000000 68.42852 18.0% 72.1 0s H 465 180 59.0000000 66.05165 12.0% 50.7 1s 610 241 64.67986 8 182 59.00000 65.80195 11.5% 50.3 5s 2227 819 62.75000 21 120 59.00000 64.49133 9.31% 46.6 10s 4849 1496 61.50000 23 112 59.00000 63.09278 6.94% 38.6 15s 8896 1862 cutoff 41 59.00000 62.07143 5.21% 33.9 20s 13057 1364 60.18182 30 121 59.00000 61.25000 3.81% 31.1 25s Cutting planes: Gomory: 9 Clique: 1 Zero half: 73 Explored 16009 nodes (468685 simplex iterations) in 27.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.900000000000e+01, best bound 5.900000000000e+01, gap 0.0%