Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:05:17 2012 Optimize a model with 919 rows, 128 columns and 1838 nonzeros Presolve removed 371 rows and 0 columns Presolve time: 0.01s Presolved: 548 rows, 128 columns, 1465 nonzeros Variable types: 0 continuous, 128 integer (128 binary) Found heuristic solution: objective 28.0000000 Root relaxation: objective 4.142645e+01, 334 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.42645 0 126 28.00000 41.42645 48.0% - 0s 0 0 41.16914 0 127 28.00000 41.16914 47.0% - 0s 0 0 41.02813 0 127 28.00000 41.02813 46.5% - 0s H 0 0 30.0000000 41.02813 36.8% - 0s 0 0 40.91031 0 128 30.00000 40.91031 36.4% - 0s 0 0 40.84739 0 127 30.00000 40.84739 36.2% - 0s 0 0 40.80453 0 128 30.00000 40.80453 36.0% - 0s 0 0 40.74445 0 126 30.00000 40.74445 35.8% - 0s 0 0 40.61517 0 128 30.00000 40.61517 35.4% - 0s 0 0 40.48869 0 126 30.00000 40.48869 35.0% - 0s 0 0 40.37725 0 127 30.00000 40.37725 34.6% - 0s 0 0 40.31197 0 127 30.00000 40.31197 34.4% - 0s 0 0 40.23480 0 127 30.00000 40.23480 34.1% - 0s 0 0 40.18897 0 127 30.00000 40.18897 34.0% - 0s 0 0 40.10994 0 127 30.00000 40.10994 33.7% - 0s 0 0 40.06390 0 127 30.00000 40.06390 33.5% - 0s 0 0 40.05937 0 127 30.00000 40.05937 33.5% - 0s 0 0 40.05937 0 126 30.00000 40.05937 33.5% - 0s 0 2 40.05830 0 126 30.00000 40.05830 33.5% - 0s * 31 14 5 32.0000000 39.70484 24.1% 62.0 0s * 2620 288 19 33.0000000 35.12500 6.44% 34.6 4s Explored 2991 nodes (98223 simplex iterations) in 4.52 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%