Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:54 2012 Optimize a model with 429 rows, 135 columns and 858 nonzeros Presolve removed 75 rows and 2 columns Presolve time: 0.00s Presolved: 354 rows, 133 columns, 747 nonzeros Variable types: 0 continuous, 133 integer (133 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.850000e+01, 188 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 58.50000 0 109 43.00000 58.50000 36.0% - 0s H 0 0 44.0000000 58.50000 33.0% - 0s 0 0 57.08333 0 121 44.00000 57.08333 29.7% - 0s 0 0 55.97449 0 130 44.00000 55.97449 27.2% - 0s 0 0 55.52632 0 131 44.00000 55.52632 26.2% - 0s 0 0 55.39474 0 133 44.00000 55.39474 25.9% - 0s H 0 0 46.0000000 55.39474 20.4% - 0s 0 0 55.25637 0 131 46.00000 55.25637 20.1% - 0s H 0 0 47.0000000 55.25637 17.6% - 0s 0 0 54.98309 0 131 47.00000 54.98309 17.0% - 0s 0 0 54.91437 0 126 47.00000 54.91437 16.8% - 0s H 0 0 48.0000000 54.91437 14.4% - 0s 0 0 54.67757 0 132 48.00000 54.67757 13.9% - 0s 0 0 54.60271 0 132 48.00000 54.60271 13.8% - 0s 0 0 54.50439 0 132 48.00000 54.50439 13.6% - 0s 0 0 54.43382 0 133 48.00000 54.43382 13.4% - 0s 0 0 54.34565 0 132 48.00000 54.34565 13.2% - 0s 0 0 54.33281 0 132 48.00000 54.33281 13.2% - 0s 0 0 54.33281 0 132 48.00000 54.33281 13.2% - 0s 0 2 54.31941 0 132 48.00000 54.31941 13.2% - 0s * 23 13 13 49.0000000 54.15278 10.5% 18.7 0s * 82 31 11 50.0000000 53.50000 7.00% 28.8 0s Cutting planes: Gomory: 2 Zero half: 109 Explored 290 nodes (8653 simplex iterations) in 0.33 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%