Gurobi 5.0.1 (linux64) logging started Sat Nov 17 20:02:21 2012 Optimize a model with 319 rows, 185 columns and 980 nonzeros Presolve time: 0.00s Presolved: 319 rows, 185 columns, 980 nonzeros Variable types: 0 continuous, 185 integer (185 binary) Found heuristic solution: objective 87.0000000 Found heuristic solution: objective 83.0000000 Root relaxation: objective 0.000000e+00, 45 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 26 83.00000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s 0 0 1.11111 0 28 72.00000 1.11111 98.5% - 0s 0 0 1.11111 0 28 72.00000 1.11111 98.5% - 0s 0 0 1.16667 0 28 72.00000 1.16667 98.4% - 0s 0 0 1.22222 0 28 72.00000 1.22222 98.3% - 0s 0 0 1.22222 0 28 72.00000 1.22222 98.3% - 0s 0 0 1.22222 0 28 72.00000 1.22222 98.3% - 0s 0 0 1.22222 0 28 72.00000 1.22222 98.3% - 0s 0 2 1.22222 0 28 72.00000 1.22222 98.3% - 0s * 228 144 17 70.0000000 17.65657 74.8% 32.4 0s * 430 217 15 69.0000000 22.70370 67.1% 29.0 0s * 453 220 16 68.0000000 26.14815 61.5% 28.6 0s H 470 216 67.0000000 26.66667 60.2% 28.3 0s * 511 224 16 65.0000000 27.00000 58.5% 27.9 0s * 934 290 27 63.0000000 28.00000 55.6% 28.6 0s * 1353 214 28 62.0000000 36.00000 41.9% 27.2 1s Cutting planes: Gomory: 1 Zero half: 4 Explored 3849 nodes (87318 simplex iterations) in 2.81 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.200000000000e+01, best bound 6.200000000000e+01, gap 0.0%