Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:19 2012 Optimize a model with 324 rows, 115 columns and 648 nonzeros Presolve removed 29 rows and 1 columns Presolve time: 0.00s Presolved: 295 rows, 114 columns, 606 nonzeros Variable types: 0 continuous, 114 integer (114 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 5.350000e+01, 155 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 53.50000 0 99 42.00000 53.50000 27.4% - 0s H 0 0 44.0000000 53.50000 21.6% - 0s 0 0 52.50000 0 97 44.00000 52.50000 19.3% - 0s 0 0 52.00000 0 110 44.00000 52.00000 18.2% - 0s H 0 0 46.0000000 52.00000 13.0% - 0s 0 0 50.83415 0 114 46.00000 50.83415 10.5% - 0s 0 0 50.52941 0 114 46.00000 50.52941 9.85% - 0s H 0 0 47.0000000 50.52941 7.51% - 0s 0 0 50.25294 0 114 47.00000 50.25294 6.92% - 0s 0 0 50.02553 0 114 47.00000 50.02553 6.44% - 0s 0 0 49.93434 0 113 47.00000 49.93434 6.24% - 0s 0 0 49.83333 0 103 47.00000 49.83333 6.03% - 0s 0 0 49.72685 0 114 47.00000 49.72685 5.80% - 0s 0 0 49.61749 0 114 47.00000 49.61749 5.57% - 0s 0 0 49.57268 0 111 47.00000 49.57268 5.47% - 0s 0 0 49.45624 0 113 47.00000 49.45624 5.23% - 0s 0 0 49.42832 0 113 47.00000 49.42832 5.17% - 0s 0 0 49.42832 0 108 47.00000 49.42832 5.17% - 0s 0 2 49.40625 0 108 47.00000 49.40625 5.12% - 0s * 29 0 3 48.0000000 48.00000 0.0% 27.7 0s Cutting planes: Zero half: 67 Explored 30 nodes (1562 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.800000000000e+01, best bound 4.800000000000e+01, gap 0.0%