Gurobi 5.0.1 (linux64) logging started Sun Nov 18 00:15:26 2012 Optimize a model with 255 rows, 178 columns and 813 nonzeros Presolve time: 0.00s Presolved: 255 rows, 178 columns, 813 nonzeros Variable types: 0 continuous, 178 integer (178 binary) Found heuristic solution: objective 51.0000000 Root relaxation: objective 0.000000e+00, 73 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 50 51.00000 0.00000 100% - 0s H 0 0 34.0000000 0.00000 100% - 0s 0 0 0.50000 0 51 34.00000 0.50000 98.5% - 0s 0 0 0.50000 0 51 34.00000 0.50000 98.5% - 0s 0 0 0.52000 0 51 34.00000 0.52000 98.5% - 0s 0 0 0.58030 0 53 34.00000 0.58030 98.3% - 0s H 0 0 33.0000000 0.58030 98.2% - 0s 0 2 0.59433 0 53 33.00000 0.59433 98.2% - 0s * 34 26 22 32.0000000 3.96875 87.6% 23.9 0s * 75 52 14 31.0000000 8.37500 73.0% 28.2 0s * 80 45 14 30.0000000 8.37500 72.1% 26.5 0s * 200 92 20 29.0000000 12.88889 55.6% 24.5 0s * 201 84 20 28.0000000 12.88889 54.0% 24.4 0s * 378 88 11 27.0000000 16.53125 38.8% 23.6 0s Cutting planes: Gomory: 1 Zero half: 1 Mod-K: 1 Explored 927 nodes (18924 simplex iterations) in 0.50 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%