Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:33 2012 Optimize a model with 693 rows, 117 columns and 1386 nonzeros Presolve removed 246 rows and 0 columns Presolve time: 0.00s Presolved: 447 rows, 117 columns, 1112 nonzeros Variable types: 0 continuous, 117 integer (117 binary) Found heuristic solution: objective 26.0000000 Root relaxation: objective 4.050289e+01, 249 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.50289 0 110 26.00000 40.50289 55.8% - 0s H 0 0 30.0000000 40.50289 35.0% - 0s 0 0 39.77193 0 113 30.00000 39.77193 32.6% - 0s H 0 0 31.0000000 39.77193 28.3% - 0s 0 0 39.44173 0 112 31.00000 39.44173 27.2% - 0s 0 0 39.24044 0 112 31.00000 39.24044 26.6% - 0s H 0 0 32.0000000 39.24044 22.6% - 0s 0 0 38.93617 0 111 32.00000 38.93617 21.7% - 0s 0 0 38.89360 0 115 32.00000 38.89360 21.5% - 0s 0 0 38.83786 0 116 32.00000 38.83786 21.4% - 0s 0 0 38.76800 0 115 32.00000 38.76800 21.2% - 0s 0 0 38.74542 0 115 32.00000 38.74542 21.1% - 0s 0 0 38.68873 0 114 32.00000 38.68873 20.9% - 0s 0 0 38.66443 0 116 32.00000 38.66443 20.8% - 0s 0 0 38.62019 0 115 32.00000 38.62019 20.7% - 0s 0 0 38.58827 0 116 32.00000 38.58827 20.6% - 0s 0 0 38.56779 0 115 32.00000 38.56779 20.5% - 0s 0 0 38.53492 0 116 32.00000 38.53492 20.4% - 0s 0 0 38.53104 0 115 32.00000 38.53104 20.4% - 0s 0 0 38.52987 0 116 32.00000 38.52987 20.4% - 0s 0 0 38.52987 0 116 32.00000 38.52987 20.4% - 0s 0 2 38.52909 0 116 32.00000 38.52909 20.4% - 0s H 14 10 33.0000000 38.52909 16.8% 61.6 0s Cutting planes: Clique: 2 Zero half: 75 Explored 727 nodes (24438 simplex iterations) in 0.98 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%