Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:17:54 2012 Optimize a model with 785 rows, 176 columns and 1570 nonzeros Presolve removed 189 rows and 0 columns Presolve time: 0.00s Presolved: 596 rows, 176 columns, 1319 nonzeros Variable types: 0 continuous, 176 integer (176 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 6.950000e+01, 355 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 69.50000 0 131 51.00000 69.50000 36.3% - 0s 0 0 69.12911 0 170 51.00000 69.12911 35.5% - 0s H 0 0 54.0000000 69.12911 28.0% - 0s 0 0 68.54749 0 175 54.00000 68.54749 26.9% - 0s 0 0 68.13511 0 172 54.00000 68.13511 26.2% - 0s 0 0 67.68209 0 173 54.00000 67.68209 25.3% - 0s 0 0 67.12179 0 175 54.00000 67.12179 24.3% - 0s 0 0 66.53893 0 176 54.00000 66.53893 23.2% - 0s 0 0 66.37337 0 176 54.00000 66.37337 22.9% - 0s 0 0 66.15846 0 175 54.00000 66.15846 22.5% - 0s 0 0 66.12611 0 174 54.00000 66.12611 22.5% - 0s 0 0 66.04273 0 176 54.00000 66.04273 22.3% - 0s 0 0 65.95086 0 175 54.00000 65.95086 22.1% - 0s 0 0 65.94393 0 175 54.00000 65.94393 22.1% - 0s 0 0 65.94393 0 175 54.00000 65.94393 22.1% - 0s 0 2 65.94158 0 175 54.00000 65.94158 22.1% - 0s * 23 18 17 55.0000000 65.93988 19.9% 50.8 0s H 301 128 56.0000000 64.06843 14.4% 50.9 0s * 424 169 19 57.0000000 63.77190 11.9% 49.4 1s 611 231 60.45455 13 175 57.00000 63.34633 11.1% 47.6 5s 625 240 63.10873 8 176 57.00000 63.34633 11.1% 46.5 10s 1703 509 59.25000 24 133 57.00000 62.11669 8.98% 52.9 15s 3414 813 59.37209 31 132 57.00000 60.60929 6.33% 46.1 20s 5599 737 59.10615 23 124 57.00000 59.62500 4.61% 41.5 25s Cutting planes: Gomory: 3 Clique: 1 Zero half: 229 Explored 7658 nodes (292856 simplex iterations) in 29.21 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%