Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:09 2012 Optimize a model with 272 rows, 99 columns and 544 nonzeros Presolve removed 70 rows and 8 columns Presolve time: 0.00s Presolved: 202 rows, 91 columns, 428 nonzeros Variable types: 0 continuous, 91 integer (91 binary) Found heuristic solution: objective 35.0000000 Root relaxation: objective 4.350000e+01, 125 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 43.50000 0 73 35.00000 43.50000 24.3% - 0s H 0 0 37.0000000 43.50000 17.6% - 0s H 0 0 39.0000000 43.50000 11.5% - 0s 0 0 42.75000 0 84 39.00000 42.75000 9.62% - 0s 0 0 42.33333 0 81 39.00000 42.33333 8.55% - 0s 0 0 41.94643 0 83 39.00000 41.94643 7.55% - 0s 0 0 41.58333 0 87 39.00000 41.58333 6.62% - 0s 0 0 41.43750 0 87 39.00000 41.43750 6.25% - 0s 0 0 41.37553 0 87 39.00000 41.37553 6.09% - 0s 0 0 41.22222 0 85 39.00000 41.22222 5.70% - 0s 0 0 40.85714 0 87 39.00000 40.85714 4.76% - 0s 0 0 40.85714 0 85 39.00000 40.85714 4.76% - 0s 0 0 40.84615 0 87 39.00000 40.84615 4.73% - 0s 0 0 40.84615 0 73 39.00000 40.84615 4.73% - 0s 0 2 40.84615 0 73 39.00000 40.84615 4.73% - 0s H 1 1 40.0000000 40.84615 2.12% 59.0 0s Cutting planes: Zero half: 19 Explored 1 nodes (650 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0%