Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:20:02 2012 Optimize a model with 798 rows, 177 columns and 1596 nonzeros Presolve removed 173 rows and 0 columns Presolve time: 0.01s Presolved: 625 rows, 177 columns, 1369 nonzeros Variable types: 0 continuous, 177 integer (177 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 7.100000e+01, 339 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 71.00000 0 136 54.00000 71.00000 31.5% - 0s 0 0 69.99209 0 170 54.00000 69.99209 29.6% - 0s H 0 0 55.0000000 69.99209 27.3% - 0s 0 0 68.91439 0 175 55.00000 68.91439 25.3% - 0s 0 0 68.69186 0 177 55.00000 68.69186 24.9% - 0s 0 0 68.24042 0 174 55.00000 68.24042 24.1% - 0s 0 0 67.99973 0 174 55.00000 67.99973 23.6% - 0s 0 0 67.78828 0 175 55.00000 67.78828 23.3% - 0s 0 0 67.51666 0 175 55.00000 67.51666 22.8% - 0s 0 0 67.45414 0 174 55.00000 67.45414 22.6% - 0s 0 0 67.33862 0 177 55.00000 67.33862 22.4% - 0s 0 0 67.26490 0 177 55.00000 67.26490 22.3% - 0s 0 0 67.15016 0 177 55.00000 67.15016 22.1% - 0s 0 0 66.99474 0 176 55.00000 66.99474 21.8% - 0s 0 0 66.92287 0 177 55.00000 66.92287 21.7% - 0s 0 0 66.88870 0 176 55.00000 66.88870 21.6% - 0s 0 0 66.85838 0 176 55.00000 66.85838 21.6% - 0s 0 0 66.85838 0 175 55.00000 66.85838 21.6% - 0s H 0 0 58.0000000 66.85838 15.3% - 0s 0 2 66.85806 0 175 58.00000 66.85806 15.3% - 0s H 27 13 59.0000000 66.69273 13.0% 48.6 0s 609 176 61.66327 11 177 59.00000 64.22062 8.85% 49.6 5s H 2092 307 60.0000000 62.63830 4.40% 44.1 9s 2421 167 cutoff 25 60.00000 61.66667 2.78% 42.5 10s Cutting planes: Gomory: 3 Clique: 1 Zero half: 72 Explored 2602 nodes (107323 simplex iterations) in 10.11 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%