Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:45:24 2012 Optimize a model with 827 rows, 183 columns and 1654 nonzeros Presolve removed 171 rows and 0 columns Presolve time: 0.01s Presolved: 656 rows, 183 columns, 1419 nonzeros Variable types: 0 continuous, 183 integer (183 binary) Found heuristic solution: objective 54.0000000 Root relaxation: objective 7.300000e+01, 296 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 73.00000 0 146 54.00000 73.00000 35.2% - 0s 0 0 71.50000 0 143 54.00000 71.50000 32.4% - 0s 0 0 70.97222 0 173 54.00000 70.97222 31.4% - 0s 0 0 69.94707 0 181 54.00000 69.94707 29.5% - 0s 0 0 68.52305 0 180 54.00000 68.52305 26.9% - 0s 0 0 67.99021 0 182 54.00000 67.99021 25.9% - 0s 0 0 67.79996 0 182 54.00000 67.79996 25.6% - 0s 0 0 67.52714 0 183 54.00000 67.52714 25.1% - 0s 0 0 67.41493 0 183 54.00000 67.41493 24.8% - 0s 0 0 67.28914 0 182 54.00000 67.28914 24.6% - 0s 0 0 67.22209 0 183 54.00000 67.22209 24.5% - 0s 0 0 67.14803 0 182 54.00000 67.14803 24.3% - 0s 0 0 67.10674 0 182 54.00000 67.10674 24.3% - 0s 0 0 67.10674 0 180 54.00000 67.10674 24.3% - 0s H 0 0 56.0000000 67.10674 19.8% - 0s H 0 0 58.0000000 67.10674 15.7% - 0s 0 2 67.09112 0 180 58.00000 67.09112 15.7% - 0s 612 284 62.16667 11 181 58.00000 64.79888 11.7% 47.7 5s H 1253 385 59.0000000 64.29723 8.98% 52.4 9s 1392 409 60.18919 27 131 59.00000 64.06250 8.58% 52.0 10s H 1805 357 60.0000000 63.49553 5.83% 50.7 11s Cutting planes: Gomory: 1 Clique: 1 Zero half: 228 Explored 3177 nodes (147082 simplex iterations) in 14.82 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%