Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:05 2012 Optimize a model with 197 rows, 87 columns and 394 nonzeros Presolve removed 39 rows and 8 columns Presolve time: 0.00s Presolved: 158 rows, 79 columns, 330 nonzeros Variable types: 0 continuous, 79 integer (79 binary) Found heuristic solution: objective 34.0000000 Root relaxation: objective 4.050000e+01, 114 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.50000 0 69 34.00000 40.50000 19.1% - 0s H 0 0 36.0000000 40.50000 12.5% - 0s 0 0 39.00000 0 74 36.00000 39.00000 8.33% - 0s 0 0 38.82500 0 78 36.00000 38.82500 7.85% - 0s 0 0 38.60000 0 78 36.00000 38.60000 7.22% - 0s 0 0 38.37681 0 74 36.00000 38.37681 6.60% - 0s 0 0 38.13869 0 78 36.00000 38.13869 5.94% - 0s 0 0 38.11364 0 79 36.00000 38.11364 5.87% - 0s 0 0 38.11364 0 78 36.00000 38.11364 5.87% - 0s 0 2 38.09091 0 77 36.00000 38.09091 5.81% - 0s H 3 3 37.0000000 37.88571 2.39% 17.3 0s Cutting planes: Gomory: 2 Zero half: 19 Explored 3 nodes (390 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.700000000000e+01, best bound 3.700000000000e+01, gap 0.0%