Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:56:36 2012 Optimize a model with 743 rows, 122 columns and 1486 nonzeros Presolve removed 284 rows and 0 columns Presolve time: 0.00s Presolved: 459 rows, 122 columns, 1164 nonzeros Variable types: 0 continuous, 122 integer (122 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 4.171196e+01, 309 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.71196 0 121 27.00000 41.71196 54.5% - 0s H 0 0 30.0000000 41.71196 39.0% - 0s 0 0 41.09657 0 116 30.00000 41.09657 37.0% - 0s 0 0 40.68287 0 121 30.00000 40.68287 35.6% - 0s H 0 0 32.0000000 40.68287 27.1% - 0s 0 0 40.45525 0 121 32.00000 40.45525 26.4% - 0s 0 0 40.33038 0 121 32.00000 40.33038 26.0% - 0s 0 0 40.28572 0 121 32.00000 40.28572 25.9% - 0s 0 0 40.20434 0 121 32.00000 40.20434 25.6% - 0s H 0 0 33.0000000 40.20434 21.8% - 0s 0 0 40.06838 0 121 33.00000 40.06838 21.4% - 0s 0 0 39.98997 0 120 33.00000 39.98997 21.2% - 0s 0 0 39.96453 0 117 33.00000 39.96453 21.1% - 0s 0 0 39.90871 0 117 33.00000 39.90871 20.9% - 0s 0 0 39.87274 0 122 33.00000 39.87274 20.8% - 0s 0 0 39.81319 0 122 33.00000 39.81319 20.6% - 0s 0 0 39.79101 0 122 33.00000 39.79101 20.6% - 0s 0 0 39.75920 0 122 33.00000 39.75920 20.5% - 0s 0 0 39.75732 0 122 33.00000 39.75732 20.5% - 0s 0 0 39.75732 0 122 33.00000 39.75732 20.5% - 0s H 0 0 34.0000000 39.75732 16.9% - 0s 0 2 39.75469 0 122 34.00000 39.75469 16.9% - 0s Cutting planes: Gomory: 1 Clique: 7 Zero half: 47 Explored 477 nodes (17299 simplex iterations) in 0.77 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0%