Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:27:53 2012 Optimize a model with 539 rows, 486 columns and 1831 nonzeros Presolve removed 0 rows and 18 columns Presolve time: 0.00s Presolved: 539 rows, 468 columns, 1813 nonzeros Variable types: 0 continuous, 468 integer (467 binary) Found heuristic solution: objective 97.0000000 Root relaxation: objective 0.000000e+00, 270 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 0 189 97.00000 0.00000 100% - 0s H 0 0 88.0000000 0.00000 100% - 0s H 0 0 79.0000000 0.00000 100% - 0s 0 0 0.39055 0 190 79.00000 0.39055 100% - 0s H 0 0 73.0000000 0.39055 99.5% - 0s H 0 0 65.0000000 0.39055 99.4% - 0s 0 0 1.00000 0 190 65.00000 1.00000 98.5% - 0s H 0 0 57.0000000 1.00000 98.2% - 0s 0 0 1.00000 0 189 57.00000 1.00000 98.2% - 0s H 0 0 54.0000000 1.00000 98.1% - 0s H 0 0 52.0000000 1.00000 98.1% - 0s H 0 0 50.0000000 1.00000 98.0% - 0s 0 2 1.00000 0 189 50.00000 1.00000 98.0% - 0s H 27 27 46.0000000 3.03704 93.4% 44.4 0s H 54 54 25.0000000 3.03704 87.9% 31.1 0s * 56 48 30 24.0000000 3.03704 87.3% 32.7 0s * 132 87 24 23.0000000 6.32847 72.5% 26.8 0s * 861 364 32 22.0000000 10.58824 51.9% 27.8 1s * 1545 283 27 21.0000000 13.78723 34.3% 26.7 2s 2940 102 cutoff 24 21.00000 18.35849 12.6% 26.4 5s Cutting planes: Gomory: 2 Explored 3083 nodes (81315 simplex iterations) in 5.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.100000000000e+01, best bound 2.100000000000e+01, gap 0.0%