Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:11 2012 Optimize a model with 499 rows, 138 columns and 998 nonzeros Presolve removed 103 rows and 0 columns Presolve time: 0.00s Presolved: 396 rows, 138 columns, 862 nonzeros Variable types: 0 continuous, 138 integer (138 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.800000e+01, 178 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 58.00000 0 116 43.00000 58.00000 34.9% - 0s H 0 0 45.0000000 58.00000 28.9% - 0s 0 0 56.94286 0 136 45.00000 56.94286 26.5% - 0s H 0 0 47.0000000 56.94286 21.2% - 0s 0 0 56.08772 0 136 47.00000 56.08772 19.3% - 0s 0 0 55.39085 0 137 47.00000 55.39085 17.9% - 0s 0 0 54.75774 0 137 47.00000 54.75774 16.5% - 0s 0 0 54.48866 0 136 47.00000 54.48866 15.9% - 0s 0 0 54.27288 0 136 47.00000 54.27288 15.5% - 0s 0 0 54.18394 0 134 47.00000 54.18394 15.3% - 0s 0 0 54.08965 0 130 47.00000 54.08965 15.1% - 0s 0 0 53.97861 0 135 47.00000 53.97861 14.8% - 0s 0 0 53.93648 0 134 47.00000 53.93648 14.8% - 0s 0 0 53.84874 0 136 47.00000 53.84874 14.6% - 0s 0 0 53.82894 0 136 47.00000 53.82894 14.5% - 0s 0 0 53.82894 0 136 47.00000 53.82894 14.5% - 0s H 0 0 48.0000000 53.82894 12.1% - 0s H 0 0 49.0000000 53.82894 9.85% - 0s 0 2 53.82482 0 136 49.00000 53.82482 9.85% - 0s * 37 13 7 50.0000000 53.59316 7.19% 32.8 0s Cutting planes: Gomory: 1 Zero half: 105 Explored 157 nodes (6478 simplex iterations) in 0.31 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%