Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:23 2012 Optimize a model with 392 rows, 120 columns and 784 nonzeros Presolve removed 81 rows and 4 columns Presolve time: 0.00s Presolved: 311 rows, 116 columns, 660 nonzeros Variable types: 0 continuous, 116 integer (116 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 5.150000e+01, 154 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 51.50000 0 91 40.00000 51.50000 28.7% - 0s 0 0 50.50000 0 89 40.00000 50.50000 26.2% - 0s 0 0 50.25000 0 109 40.00000 50.25000 25.6% - 0s 0 0 49.38462 0 110 40.00000 49.38462 23.5% - 0s H 0 0 41.0000000 49.38462 20.5% - 0s H 0 0 44.0000000 49.38462 12.2% - 0s H 0 0 45.0000000 49.38462 9.74% - 0s 0 0 49.28571 0 104 45.00000 49.28571 9.52% - 0s 0 0 49.00000 0 107 45.00000 49.00000 8.89% - 0s 0 0 48.64612 0 110 45.00000 48.64612 8.10% - 0s 0 0 48.49630 0 109 45.00000 48.49630 7.77% - 0s 0 0 48.37500 0 108 45.00000 48.37500 7.50% - 0s 0 0 48.26389 0 105 45.00000 48.26389 7.25% - 0s 0 0 48.13793 0 114 45.00000 48.13793 6.97% - 0s H 0 0 46.0000000 48.13793 4.65% - 0s 0 0 48.00000 0 109 46.00000 48.00000 4.35% - 0s 0 0 48.00000 0 110 46.00000 48.00000 4.35% - 0s 0 0 48.00000 0 88 46.00000 48.00000 4.35% - 0s 0 2 48.00000 0 88 46.00000 48.00000 4.35% - 0s Cutting planes: Zero half: 46 Explored 26 nodes (1816 simplex iterations) in 0.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%