Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:34 2012 Optimize a model with 693 rows, 117 columns and 1386 nonzeros Presolve removed 259 rows and 0 columns Presolve time: 0.00s Presolved: 434 rows, 117 columns, 1108 nonzeros Variable types: 0 continuous, 117 integer (117 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 4.017058e+01, 290 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.17058 0 116 28.00000 40.17058 43.5% - 0s 0 0 39.93297 0 114 28.00000 39.93297 42.6% - 0s H 0 0 30.0000000 39.93297 33.1% - 0s 0 0 39.82030 0 116 30.00000 39.82030 32.7% - 0s H 0 0 31.0000000 39.82030 28.5% - 0s 0 0 39.51573 0 114 31.00000 39.51573 27.5% - 0s 0 0 39.25611 0 115 31.00000 39.25611 26.6% - 0s 0 0 38.96154 0 116 31.00000 38.96154 25.7% - 0s 0 0 38.93593 0 115 31.00000 38.93593 25.6% - 0s 0 0 38.84790 0 115 31.00000 38.84790 25.3% - 0s H 0 0 32.0000000 38.84790 21.4% - 0s 0 0 38.69801 0 113 32.00000 38.69801 20.9% - 0s 0 0 38.55953 0 115 32.00000 38.55953 20.5% - 0s 0 0 38.49939 0 114 32.00000 38.49939 20.3% - 0s 0 0 38.40053 0 113 32.00000 38.40053 20.0% - 0s 0 0 38.29951 0 115 32.00000 38.29951 19.7% - 0s H 0 0 33.0000000 38.29951 16.1% - 0s 0 0 38.25197 0 114 33.00000 38.25197 15.9% - 0s 0 0 38.20679 0 115 33.00000 38.20679 15.8% - 0s 0 0 38.17555 0 116 33.00000 38.17555 15.7% - 0s 0 0 38.17011 0 116 33.00000 38.17011 15.7% - 0s 0 0 38.17011 0 115 33.00000 38.17011 15.7% - 0s 0 2 38.16980 0 115 33.00000 38.16980 15.7% - 0s Cutting planes: Clique: 3 Zero half: 69 Explored 340 nodes (13115 simplex iterations) in 0.60 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%