Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:23 2012 Optimize a model with 466 rows, 140 columns and 932 nonzeros Presolve removed 97 rows and 7 columns Presolve time: 0.00s Presolved: 369 rows, 133 columns, 776 nonzeros Variable types: 0 continuous, 133 integer (133 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 6.133333e+01, 235 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 61.33333 0 124 43.00000 61.33333 42.6% - 0s H 0 0 48.0000000 61.33333 27.8% - 0s 0 0 59.72222 0 125 48.00000 59.72222 24.4% - 0s 0 0 58.91892 0 132 48.00000 58.91892 22.7% - 0s H 0 0 49.0000000 58.91892 20.2% - 0s 0 0 58.08333 0 129 49.00000 58.08333 18.5% - 0s 0 0 57.57414 0 133 49.00000 57.57414 17.5% - 0s H 0 0 50.0000000 57.57414 15.1% - 0s 0 0 57.44076 0 133 50.00000 57.44076 14.9% - 0s 0 0 57.30348 0 133 50.00000 57.30348 14.6% - 0s 0 0 57.13584 0 133 50.00000 57.13584 14.3% - 0s 0 0 57.07867 0 133 50.00000 57.07867 14.2% - 0s 0 0 56.93681 0 133 50.00000 56.93681 13.9% - 0s 0 0 56.84615 0 133 50.00000 56.84615 13.7% - 0s 0 0 56.79633 0 133 50.00000 56.79633 13.6% - 0s 0 0 56.79633 0 133 50.00000 56.79633 13.6% - 0s H 0 0 51.0000000 56.79633 11.4% - 0s H 0 0 52.0000000 56.79633 9.22% - 0s 0 2 56.78843 0 133 52.00000 56.78843 9.21% - 0s * 12 6 5 53.0000000 56.78843 7.15% 36.3 0s Cutting planes: Zero half: 112 Explored 140 nodes (6001 simplex iterations) in 0.27 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0%