Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:52:18 2012 Optimize a model with 215 rows, 155 columns and 690 nonzeros Presolve time: 0.00s Presolved: 215 rows, 155 columns, 690 nonzeros Variable types: 0 continuous, 155 integer (155 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 0.000000e+00, 69 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 48 51.00000 0.00000 100% - 0s H 0 0 38.0000000 0.00000 100% - 0s 0 0 0.65600 0 51 38.00000 0.65600 98.3% - 0s 0 0 0.79221 0 50 38.00000 0.79221 97.9% - 0s 0 0 0.83333 0 50 38.00000 0.83333 97.8% - 0s H 0 0 32.0000000 0.83333 97.4% - 0s 0 0 0.84724 0 58 32.00000 0.84724 97.4% - 0s 0 0 0.85417 0 50 32.00000 0.85417 97.3% - 0s 0 0 0.88937 0 58 32.00000 0.88937 97.2% - 0s 0 0 0.92000 0 63 32.00000 0.92000 97.1% - 0s 0 0 0.95238 0 51 32.00000 0.95238 97.0% - 0s 0 0 0.95639 0 66 32.00000 0.95639 97.0% - 0s 0 2 1.01638 0 66 32.00000 1.01638 96.8% - 0s * 26 24 15 31.0000000 3.44907 88.9% 26.8 0s * 52 40 15 30.0000000 3.83333 87.2% 26.4 0s * 76 43 17 25.0000000 6.57895 73.7% 24.0 0s * 103 50 11 24.0000000 7.00000 70.8% 24.9 0s * 127 57 12 23.0000000 9.38672 59.2% 24.2 0s * 249 60 14 22.0000000 12.00000 45.5% 20.5 0s Cutting planes: Gomory: 1 Mod-K: 6 Explored 553 nodes (10519 simplex iterations) in 0.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%