Gurobi 5.0.1 (linux64) logging started Tue Nov 20 13:06:44 2012 Optimize a model with 726 rows, 172 columns and 1452 nonzeros Presolve removed 150 rows and 0 columns Presolve time: 0.00s Presolved: 576 rows, 172 columns, 1246 nonzeros Variable types: 0 continuous, 172 integer (172 binary) Found heuristic solution: objective 48.0000000 Root relaxation: objective 6.950000e+01, 303 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 0 135 48.00000 69.50000 44.8% - 0s 0 0 68.28125 0 166 48.00000 68.28125 42.3% - 0s 0 0 66.92308 0 169 48.00000 66.92308 39.4% - 0s H 0 0 49.0000000 66.92308 36.6% - 0s 0 0 66.57606 0 168 49.00000 66.57606 35.9% - 0s 0 0 65.97701 0 168 49.00000 65.97701 34.6% - 0s H 0 0 51.0000000 65.97701 29.4% - 0s 0 0 65.71042 0 168 51.00000 65.71042 28.8% - 0s 0 0 65.35879 0 170 51.00000 65.35879 28.2% - 0s H 0 0 52.0000000 65.35879 25.7% - 0s 0 0 65.10539 0 169 52.00000 65.10539 25.2% - 0s 0 0 65.02598 0 168 52.00000 65.02598 25.0% - 0s 0 0 64.98462 0 171 52.00000 64.98462 25.0% - 0s 0 0 64.98462 0 171 52.00000 64.98462 25.0% - 0s 0 2 64.98127 0 170 52.00000 64.98127 25.0% - 0s H 56 34 54.0000000 64.72699 19.9% 47.5 0s H 66 30 56.0000000 64.46816 15.1% 52.0 0s * 70 31 11 58.0000000 64.46816 11.2% 51.1 0s 612 160 60.00000 14 170 58.00000 61.82609 6.60% 46.1 5s 695 196 60.58396 13 144 58.00000 61.82609 6.60% 53.3 10s 2241 53 59.10769 24 134 58.00000 59.50000 2.59% 47.8 15s Cutting planes: Gomory: 2 Zero half: 268 Explored 2316 nodes (109924 simplex iterations) in 15.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.800000000000e+01, best bound 5.800000000000e+01, gap 0.0%