Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:48:15 2012 Optimize a model with 595 rows, 536 columns and 2021 nonzeros Presolve removed 0 rows and 10 columns Presolve time: 0.00s Presolved: 595 rows, 526 columns, 2011 nonzeros Variable types: 0 continuous, 526 integer (525 binary) Found heuristic solution: objective 126.0000000 Root relaxation: objective 0.000000e+00, 284 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 224 126.00000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s H 0 0 70.0000000 0.00000 100% - 0s H 0 0 66.0000000 0.00000 100% - 0s 0 0 0.54555 0 225 66.00000 0.54555 99.2% - 0s H 0 0 64.0000000 0.54555 99.1% - 0s 0 0 1.18395 0 228 64.00000 1.18395 98.2% - 0s H 0 0 58.0000000 1.18395 98.0% - 0s 0 0 1.18415 0 230 58.00000 1.18415 98.0% - 0s 0 0 1.18415 0 230 58.00000 1.18415 98.0% - 0s H 0 0 52.0000000 1.18415 97.7% - 0s H 0 0 51.0000000 1.18415 97.7% - 0s H 0 0 47.0000000 1.18415 97.5% - 0s 0 2 1.18831 0 230 47.00000 1.18831 97.5% - 0s H 54 54 38.0000000 2.81648 92.6% 30.5 0s * 93 56 55 26.0000000 2.81648 89.2% 23.2 0s * 135 78 26 24.0000000 2.81865 88.3% 26.2 0s * 138 58 29 23.0000000 2.81865 87.7% 25.8 0s H 172 62 21.0000000 4.32584 79.4% 26.4 0s * 1055 232 32 20.0000000 8.32558 58.4% 35.5 2s 2603 428 16.70854 22 229 20.00000 14.49351 27.5% 30.0 5s Explored 5040 nodes (135345 simplex iterations) in 8.78 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%