Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:30 2012 Optimize a model with 684 rows, 116 columns and 1368 nonzeros Presolve removed 243 rows and 0 columns Presolve time: 0.00s Presolved: 441 rows, 116 columns, 1098 nonzeros Variable types: 0 continuous, 116 integer (116 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 4.008333e+01, 317 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 40.08333 0 114 29.00000 40.08333 38.2% - 0s H 0 0 30.0000000 40.08333 33.6% - 0s 0 0 39.74495 0 114 30.00000 39.74495 32.5% - 0s 0 0 39.50774 0 115 30.00000 39.50774 31.7% - 0s 0 0 39.42845 0 114 30.00000 39.42845 31.4% - 0s 0 0 39.38950 0 114 30.00000 39.38950 31.3% - 0s 0 0 39.33311 0 115 30.00000 39.33311 31.1% - 0s H 0 0 32.0000000 39.33311 22.9% - 0s 0 0 39.23782 0 114 32.00000 39.23782 22.6% - 0s H 0 0 33.0000000 39.23782 18.9% - 0s 0 0 39.21392 0 114 33.00000 39.21392 18.8% - 0s H 0 0 34.0000000 39.21392 15.3% - 0s 0 0 39.16486 0 114 34.00000 39.16486 15.2% - 0s 0 0 39.02116 0 115 34.00000 39.02116 14.8% - 0s 0 0 38.88746 0 113 34.00000 38.88746 14.4% - 0s 0 0 38.83071 0 114 34.00000 38.83071 14.2% - 0s 0 0 38.75426 0 114 34.00000 38.75426 14.0% - 0s 0 0 38.69757 0 114 34.00000 38.69757 13.8% - 0s 0 0 38.62626 0 112 34.00000 38.62626 13.6% - 0s 0 0 38.51660 0 113 34.00000 38.51660 13.3% - 0s 0 0 38.49909 0 114 34.00000 38.49909 13.2% - 0s 0 0 38.49041 0 113 34.00000 38.49041 13.2% - 0s 0 0 38.46551 0 114 34.00000 38.46551 13.1% - 0s 0 0 38.42492 0 114 34.00000 38.42492 13.0% - 0s 0 0 38.40400 0 114 34.00000 38.40400 13.0% - 0s 0 0 38.39040 0 115 34.00000 38.39040 12.9% - 0s 0 0 38.39040 0 115 34.00000 38.39040 12.9% - 0s 0 2 38.39040 0 115 34.00000 38.39040 12.9% - 0s Cutting planes: Clique: 4 Zero half: 62 Explored 192 nodes (8774 simplex iterations) in 0.50 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%