Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:51:41 2012 Optimize a model with 634 rows, 114 columns and 1268 nonzeros Presolve removed 220 rows and 0 columns Presolve time: 0.00s Presolved: 414 rows, 114 columns, 1031 nonzeros Variable types: 0 continuous, 114 integer (114 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 3.984091e+01, 259 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39.84091 0 112 30.00000 39.84091 32.8% - 0s 0 0 39.53236 0 114 30.00000 39.53236 31.8% - 0s H 0 0 31.0000000 39.53236 27.5% - 0s 0 0 39.43020 0 113 31.00000 39.43020 27.2% - 0s 0 0 39.29120 0 114 31.00000 39.29120 26.7% - 0s 0 0 39.08575 0 113 31.00000 39.08575 26.1% - 0s 0 0 39.01458 0 112 31.00000 39.01458 25.9% - 0s 0 0 38.84402 0 114 31.00000 38.84402 25.3% - 0s 0 0 38.76892 0 113 31.00000 38.76892 25.1% - 0s 0 0 38.71147 0 114 31.00000 38.71147 24.9% - 0s 0 0 38.66081 0 111 31.00000 38.66081 24.7% - 0s 0 0 38.58169 0 114 31.00000 38.58169 24.5% - 0s 0 0 38.51383 0 112 31.00000 38.51383 24.2% - 0s 0 0 38.49713 0 112 31.00000 38.49713 24.2% - 0s 0 0 38.40282 0 112 31.00000 38.40282 23.9% - 0s H 0 0 32.0000000 38.40282 20.0% - 0s 0 0 38.38103 0 112 32.00000 38.38103 19.9% - 0s 0 0 38.36641 0 112 32.00000 38.36641 19.9% - 0s 0 0 38.30605 0 114 32.00000 38.30605 19.7% - 0s 0 0 38.29140 0 114 32.00000 38.29140 19.7% - 0s 0 0 38.29140 0 114 32.00000 38.29140 19.7% - 0s 0 2 38.28879 0 114 32.00000 38.28879 19.7% - 0s H 27 17 33.0000000 38.06135 15.3% 41.0 0s * 53 19 7 34.0000000 37.94856 11.6% 38.1 0s Cutting planes: Clique: 2 Zero half: 46 Explored 195 nodes (7498 simplex iterations) in 0.39 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%