Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:21:01 2012 Optimize a model with 393 rows, 286 columns and 1266 nonzeros Presolve time: 0.00s Presolved: 393 rows, 286 columns, 1266 nonzeros Variable types: 0 continuous, 286 integer (286 binary) Found heuristic solution: objective 89.0000000 Root relaxation: objective 0.000000e+00, 121 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 90 89.00000 0.00000 100% - 0s H 0 0 62.0000000 0.00000 100% - 0s 0 0 0.73864 0 92 62.00000 0.73864 98.8% - 0s H 0 0 59.0000000 0.73864 98.7% - 0s 0 0 0.80682 0 92 59.00000 0.80682 98.6% - 0s 0 0 0.83333 0 92 59.00000 0.83333 98.6% - 0s 0 0 0.84091 0 92 59.00000 0.84091 98.6% - 0s 0 0 0.84091 0 92 59.00000 0.84091 98.6% - 0s H 0 0 56.0000000 0.84091 98.5% - 0s H 0 0 52.0000000 0.84091 98.4% - 0s H 0 0 51.0000000 0.84091 98.4% - 0s 0 2 0.84091 0 92 51.00000 0.84091 98.4% - 0s * 49 41 32 46.0000000 3.16507 93.1% 27.2 0s * 87 62 24 38.0000000 3.17530 91.6% 27.1 0s * 157 101 18 35.0000000 6.51190 81.4% 29.6 0s * 292 178 23 34.0000000 8.79545 74.1% 28.5 0s * 583 281 19 32.0000000 12.61147 60.6% 25.9 0s * 1571 268 27 31.0000000 19.33333 37.6% 25.5 1s Cutting planes: Gomory: 1 Zero half: 3 Explored 4000 nodes (87520 simplex iterations) in 4.41 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%