Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:24 2012 Optimize a model with 395 rows, 120 columns and 790 nonzeros Presolve removed 84 rows and 2 columns Presolve time: 0.00s Presolved: 311 rows, 118 columns, 668 nonzeros Variable types: 0 continuous, 118 integer (118 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.150000e+01, 172 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 51.50000 0 99 43.00000 51.50000 19.8% - 0s 0 0 49.75000 0 99 43.00000 49.75000 15.7% - 0s 0 0 49.40000 0 114 43.00000 49.40000 14.9% - 0s 0 0 49.31939 0 115 43.00000 49.31939 14.7% - 0s 0 0 49.18743 0 115 43.00000 49.18743 14.4% - 0s 0 0 48.86913 0 116 43.00000 48.86913 13.6% - 0s H 0 0 44.0000000 48.86913 11.1% - 0s 0 0 48.57692 0 115 44.00000 48.57692 10.4% - 0s 0 0 48.45911 0 116 44.00000 48.45911 10.1% - 0s 0 0 48.31024 0 117 44.00000 48.31024 9.80% - 0s 0 0 48.11297 0 114 44.00000 48.11297 9.35% - 0s 0 0 48.05286 0 114 44.00000 48.05286 9.21% - 0s 0 0 47.86667 0 114 44.00000 47.86667 8.79% - 0s 0 0 47.79457 0 112 44.00000 47.79457 8.62% - 0s 0 0 47.78053 0 113 44.00000 47.78053 8.59% - 0s 0 0 47.78053 0 112 44.00000 47.78053 8.59% - 0s H 0 0 45.0000000 47.78053 6.18% - 0s 0 2 47.78053 0 112 45.00000 47.78053 6.18% - 0s Cutting planes: Gomory: 2 Zero half: 68 Explored 64 nodes (2788 simplex iterations) in 0.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.500000000000e+01, best bound 4.500000000000e+01, gap 0.0%