Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:05 2012 Optimize a model with 204 rows, 86 columns and 408 nonzeros Presolve removed 47 rows and 9 columns Presolve time: 0.00s Presolved: 157 rows, 77 columns, 328 nonzeros Variable types: 0 continuous, 77 integer (77 binary) Found heuristic solution: objective 35.0000000 Root relaxation: objective 4.050000e+01, 100 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 67 35.00000 40.50000 15.7% - 0s 0 0 39.83333 0 77 35.00000 39.83333 13.8% - 0s H 0 0 36.0000000 39.83333 10.6% - 0s 0 0 38.77778 0 69 36.00000 38.77778 7.72% - 0s 0 0 38.44444 0 70 36.00000 38.44444 6.79% - 0s H 0 0 37.0000000 38.44444 3.90% - 0s 0 0 38.17647 0 74 37.00000 38.17647 3.18% - 0s 0 0 cutoff 0 37.00000 37.99996 2.70% - 0s Cutting planes: Zero half: 39 Explored 0 nodes (245 simplex iterations) in 0.02 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%