Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:36:25 2012 Optimize a model with 545 rows, 151 columns and 1090 nonzeros Presolve removed 119 rows and 6 columns Presolve time: 0.00s Presolved: 426 rows, 145 columns, 899 nonzeros Variable types: 0 continuous, 145 integer (145 binary) Found heuristic solution: objective 52.0000000 Root relaxation: objective 6.400000e+01, 231 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 64.00000 0 116 52.00000 64.00000 23.1% - 0s 0 0 63.36364 0 140 52.00000 63.36364 21.9% - 0s 0 0 62.50000 0 136 52.00000 62.50000 20.2% - 0s H 0 0 53.0000000 62.50000 17.9% - 0s H 0 0 54.0000000 62.50000 15.7% - 0s 0 0 61.94004 0 145 54.00000 61.94004 14.7% - 0s 0 0 61.07143 0 142 54.00000 61.07143 13.1% - 0s 0 0 60.88889 0 142 54.00000 60.88889 12.8% - 0s 0 0 60.68696 0 144 54.00000 60.68696 12.4% - 0s H 0 0 55.0000000 60.68696 10.3% - 0s 0 0 60.23313 0 144 55.00000 60.23313 9.51% - 0s 0 0 60.08556 0 140 55.00000 60.08556 9.25% - 0s 0 0 60.01880 0 144 55.00000 60.01880 9.13% - 0s 0 0 60.00558 0 144 55.00000 60.00558 9.10% - 0s 0 0 60.00558 0 142 55.00000 60.00558 9.10% - 0s 0 2 60.00522 0 142 55.00000 60.00522 9.10% - 0s H 2 2 56.0000000 60.00522 7.15% 59.0 0s * 6 4 5 57.0000000 60.00522 5.27% 45.8 0s Cutting planes: Zero half: 99 Explored 53 nodes (3350 simplex iterations) in 0.19 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.700000000000e+01, best bound 5.700000000000e+01, gap 0.0%