Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:07 2012 Optimize a model with 607 rows, 108 columns and 1214 nonzeros Presolve removed 221 rows and 0 columns Presolve time: 0.00s Presolved: 386 rows, 108 columns, 964 nonzeros Variable types: 0 continuous, 108 integer (108 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.730623e+01, 273 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 37.30623 0 108 26.00000 37.30623 43.5% - 0s H 0 0 29.0000000 37.30623 28.6% - 0s 0 0 36.92666 0 107 29.00000 36.92666 27.3% - 0s 0 0 36.68330 0 108 29.00000 36.68330 26.5% - 0s 0 0 36.42373 0 107 29.00000 36.42373 25.6% - 0s 0 0 36.27544 0 108 29.00000 36.27544 25.1% - 0s 0 0 36.06426 0 107 29.00000 36.06426 24.4% - 0s 0 0 35.95061 0 108 29.00000 35.95061 24.0% - 0s 0 0 35.87782 0 107 29.00000 35.87782 23.7% - 0s 0 0 35.86537 0 108 29.00000 35.86537 23.7% - 0s 0 0 35.86537 0 108 29.00000 35.86537 23.7% - 0s 0 2 35.86489 0 108 29.00000 35.86489 23.7% - 0s * 20 14 14 30.0000000 35.71509 19.1% 31.4 0s Cutting planes: Clique: 4 Zero half: 39 Explored 862 nodes (21029 simplex iterations) in 0.72 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+01, best bound 3.000000000000e+01, gap 0.0%