Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:40 2012 Optimize a model with 423 rows, 130 columns and 846 nonzeros Presolve removed 73 rows and 0 columns Presolve time: 0.00s Presolved: 350 rows, 130 columns, 743 nonzeros Variable types: 0 continuous, 130 integer (130 binary) Found heuristic solution: objective 45.0000000 Root relaxation: objective 5.638095e+01, 198 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 56.38095 0 126 45.00000 56.38095 25.3% - 0s H 0 0 46.0000000 56.38095 22.6% - 0s 0 0 55.21368 0 129 46.00000 55.21368 20.0% - 0s 0 0 54.59259 0 126 46.00000 54.59259 18.7% - 0s H 0 0 47.0000000 54.59259 16.2% - 0s 0 0 54.26190 0 127 47.00000 54.26190 15.5% - 0s 0 0 54.10573 0 127 47.00000 54.10573 15.1% - 0s 0 0 53.72000 0 125 47.00000 53.72000 14.3% - 0s 0 0 53.51095 0 127 47.00000 53.51095 13.9% - 0s 0 0 53.46378 0 127 47.00000 53.46378 13.8% - 0s 0 0 53.40879 0 127 47.00000 53.40879 13.6% - 0s 0 0 53.21076 0 126 47.00000 53.21076 13.2% - 0s 0 0 52.99055 0 129 47.00000 52.99055 12.7% - 0s 0 0 52.97642 0 129 47.00000 52.97642 12.7% - 0s 0 0 52.97642 0 127 47.00000 52.97642 12.7% - 0s H 0 0 48.0000000 52.97642 10.4% - 0s 0 2 52.97367 0 126 48.00000 52.97367 10.4% - 0s H 25 15 49.0000000 52.72917 7.61% 25.6 0s H 66 16 50.0000000 52.19843 4.40% 23.0 0s Cutting planes: Zero half: 76 Explored 96 nodes (3102 simplex iterations) in 0.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%