Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:21 2012 Optimize a model with 379 rows, 118 columns and 758 nonzeros Presolve removed 85 rows and 4 columns Presolve time: 0.00s Presolved: 294 rows, 114 columns, 630 nonzeros Variable types: 0 continuous, 114 integer (114 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.100000e+01, 182 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 51.00000 0 87 43.00000 51.00000 18.6% - 0s H 0 0 47.0000000 51.00000 8.51% - 0s 0 0 50.44444 0 102 47.00000 50.44444 7.33% - 0s 0 0 49.97377 0 108 47.00000 49.97377 6.33% - 0s 0 0 49.68966 0 107 47.00000 49.68966 5.72% - 0s 0 0 49.43204 0 108 47.00000 49.43204 5.17% - 0s 0 0 49.28947 0 113 47.00000 49.28947 4.87% - 0s 0 0 49.22400 0 111 47.00000 49.22400 4.73% - 0s 0 0 49.09146 0 111 47.00000 49.09146 4.45% - 0s 0 0 48.94767 0 110 47.00000 48.94767 4.14% - 0s 0 0 48.90728 0 112 47.00000 48.90728 4.06% - 0s 0 0 48.86402 0 112 47.00000 48.86402 3.97% - 0s 0 0 48.77044 0 112 47.00000 48.77044 3.77% - 0s 0 0 48.74009 0 111 47.00000 48.74009 3.70% - 0s 0 0 48.70455 0 111 47.00000 48.70455 3.63% - 0s 0 0 48.69318 0 112 47.00000 48.69318 3.60% - 0s 0 0 48.69318 0 112 47.00000 48.69318 3.60% - 0s 0 2 48.69318 0 112 47.00000 48.69318 3.60% - 0s Cutting planes: Zero half: 47 Explored 24 nodes (1357 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%