Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:09 2012 Optimize a model with 474 rows, 137 columns and 948 nonzeros Presolve removed 84 rows and 2 columns Presolve time: 0.00s Presolved: 390 rows, 135 columns, 825 nonzeros Variable types: 0 continuous, 135 integer (135 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.900000e+01, 225 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 59.00000 0 110 43.00000 59.00000 37.2% - 0s H 0 0 47.0000000 59.00000 25.5% - 0s 0 0 58.35000 0 129 47.00000 58.35000 24.1% - 0s 0 0 56.87692 0 131 47.00000 56.87692 21.0% - 0s 0 0 55.94444 0 134 47.00000 55.94444 19.0% - 0s 0 0 55.29646 0 135 47.00000 55.29646 17.7% - 0s 0 0 55.07301 0 134 47.00000 55.07301 17.2% - 0s H 0 0 48.0000000 55.07301 14.7% - 0s 0 0 54.87178 0 135 48.00000 54.87178 14.3% - 0s 0 0 54.75687 0 135 48.00000 54.75687 14.1% - 0s 0 0 54.60429 0 135 48.00000 54.60429 13.8% - 0s 0 0 54.50574 0 135 48.00000 54.50574 13.6% - 0s 0 0 54.44065 0 135 48.00000 54.44065 13.4% - 0s 0 0 54.42638 0 134 48.00000 54.42638 13.4% - 0s 0 0 54.38367 0 135 48.00000 54.38367 13.3% - 0s 0 0 54.38367 0 135 48.00000 54.38367 13.3% - 0s 0 2 54.38011 0 135 48.00000 54.38011 13.3% - 0s * 10 10 7 49.0000000 54.37899 11.0% 56.9 0s Cutting planes: Zero half: 155 Explored 772 nodes (22599 simplex iterations) in 0.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.900000000000e+01, best bound 4.900000000000e+01, gap 0.0%