Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:33:20 2012 Optimize a model with 481 rows, 139 columns and 962 nonzeros Presolve removed 89 rows and 5 columns Presolve time: 0.00s Presolved: 392 rows, 134 columns, 834 nonzeros Variable types: 0 continuous, 134 integer (134 binary) Found heuristic solution: objective 46.0000000 Root relaxation: objective 6.100000e+01, 186 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 61.00000 0 106 46.00000 61.00000 32.6% - 0s H 0 0 47.0000000 61.00000 29.8% - 0s 0 0 60.50000 0 105 47.00000 60.50000 28.7% - 0s 0 0 60.00000 0 124 47.00000 60.00000 27.7% - 0s 0 0 59.43750 0 125 47.00000 59.43750 26.5% - 0s 0 0 58.51515 0 133 47.00000 58.51515 24.5% - 0s H 0 0 49.0000000 58.51515 19.4% - 0s 0 0 57.96188 0 134 49.00000 57.96188 18.3% - 0s 0 0 57.56790 0 132 49.00000 57.56790 17.5% - 0s 0 0 57.46234 0 133 49.00000 57.46234 17.3% - 0s 0 0 57.34446 0 132 49.00000 57.34446 17.0% - 0s 0 0 57.25706 0 133 49.00000 57.25706 16.9% - 0s 0 0 57.13898 0 133 49.00000 57.13898 16.6% - 0s 0 0 56.98705 0 134 49.00000 56.98705 16.3% - 0s 0 0 56.93852 0 134 49.00000 56.93852 16.2% - 0s 0 0 56.93852 0 134 49.00000 56.93852 16.2% - 0s 0 2 56.93803 0 134 49.00000 56.93803 16.2% - 0s H 7 7 50.0000000 56.93326 13.9% 54.7 0s * 14 14 9 51.0000000 56.93326 11.6% 41.0 0s H 27 15 53.0000000 56.84549 7.26% 36.5 0s Cutting planes: Clique: 1 Zero half: 119 Explored 127 nodes (5502 simplex iterations) in 0.26 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%