Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:48:13 2012 Optimize a model with 389 rows, 276 columns and 1246 nonzeros Presolve time: 0.00s Presolved: 389 rows, 276 columns, 1246 nonzeros Variable types: 0 continuous, 276 integer (276 binary) Found heuristic solution: objective 78.0000000 Root relaxation: objective 0.000000e+00, 116 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 81 78.00000 0.00000 100% - 0s H 0 0 58.0000000 0.00000 100% - 0s 0 0 0.70266 0 84 58.00000 0.70266 98.8% - 0s H 0 0 57.0000000 0.70266 98.8% - 0s 0 0 0.71583 0 85 57.00000 0.71583 98.7% - 0s 0 0 0.80769 0 84 57.00000 0.80769 98.6% - 0s H 0 0 53.0000000 0.80769 98.5% - 0s 0 0 0.83128 0 84 53.00000 0.83128 98.4% - 0s 0 0 0.83539 0 84 53.00000 0.83539 98.4% - 0s 0 0 0.83539 0 84 53.00000 0.83539 98.4% - 0s 0 2 0.84188 0 84 53.00000 0.84188 98.4% - 0s * 52 50 33 49.0000000 3.90823 92.0% 23.7 0s * 128 97 25 47.0000000 6.39189 86.4% 22.5 0s * 179 121 20 42.0000000 6.61538 84.2% 23.7 0s * 281 193 16 40.0000000 9.87264 75.3% 25.0 0s * 839 366 33 39.0000000 14.32857 63.3% 24.4 1s * 846 346 34 38.0000000 14.32857 62.3% 24.2 1s * 1699 283 32 37.0000000 23.15385 37.4% 22.9 1s * 4070 195 27 36.0000000 27.93023 22.4% 21.0 4s Cutting planes: Gomory: 1 Mod-K: 3 Explored 4756 nodes (97837 simplex iterations) in 4.81 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.600000000000e+01, best bound 3.600000000000e+01, gap 0.0%