Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:19 2012 Optimize a model with 338 rows, 116 columns and 676 nonzeros Presolve removed 71 rows and 4 columns Presolve time: 0.00s Presolved: 267 rows, 112 columns, 563 nonzeros Variable types: 0 continuous, 112 integer (112 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 5.050000e+01, 148 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50.50000 0 87 45.00000 50.50000 12.2% - 0s 0 0 50.00000 0 105 45.00000 50.00000 11.1% - 0s H 0 0 46.0000000 50.00000 8.70% - 0s 0 0 49.50000 0 111 46.00000 49.50000 7.61% - 0s 0 0 49.10145 0 111 46.00000 49.10145 6.74% - 0s 0 0 48.80303 0 110 46.00000 48.80303 6.09% - 0s 0 0 48.57143 0 107 46.00000 48.57143 5.59% - 0s 0 0 48.50000 0 108 46.00000 48.50000 5.43% - 0s 0 0 48.38889 0 105 46.00000 48.38889 5.19% - 0s 0 0 48.38095 0 107 46.00000 48.38095 5.18% - 0s 0 0 48.38095 0 105 46.00000 48.38095 5.18% - 0s H 0 0 47.0000000 48.38095 2.94% - 0s 0 2 48.38095 0 105 47.00000 48.38095 2.94% - 0s Cutting planes: Gomory: 1 Zero half: 27 Explored 13 nodes (833 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%