Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:52 2012 Optimize a model with 317 rows, 83 columns and 634 nonzeros Presolve removed 95 rows and 2 columns Presolve time: 0.00s Presolved: 222 rows, 81 columns, 511 nonzeros Variable types: 0 continuous, 81 integer (81 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 3.200000e+01, 132 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 32.00000 0 68 26.00000 32.00000 23.1% - 0s 0 0 31.33333 0 76 26.00000 31.33333 20.5% - 0s H 0 0 27.0000000 31.33333 16.0% - 0s 0 0 30.98315 0 79 27.00000 30.98315 14.8% - 0s 0 0 30.78947 0 77 27.00000 30.78947 14.0% - 0s 0 0 30.48649 0 78 27.00000 30.48649 12.9% - 0s 0 0 30.33011 0 80 27.00000 30.33011 12.3% - 0s 0 0 30.14051 0 80 27.00000 30.14051 11.6% - 0s 0 0 30.09328 0 81 27.00000 30.09328 11.5% - 0s 0 0 30.07527 0 80 27.00000 30.07527 11.4% - 0s 0 0 30.05556 0 79 27.00000 30.05556 11.3% - 0s 0 0 30.03191 0 76 27.00000 30.03191 11.2% - 0s 0 0 30.01500 0 78 27.00000 30.01500 11.2% - 0s 0 0 30.01500 0 78 27.00000 30.01500 11.2% - 0s 0 2 30.01434 0 76 27.00000 30.01434 11.2% - 0s * 39 6 5 28.0000000 29.76923 6.32% 18.1 0s Cutting planes: Gomory: 1 Zero half: 39 Explored 46 nodes (1244 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.800000000000e+01, best bound 2.800000000000e+01, gap 0.0%