Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:50:52 2012 Optimize a model with 641 rows, 112 columns and 1282 nonzeros Presolve removed 222 rows and 0 columns Presolve time: 0.00s Presolved: 419 rows, 112 columns, 1042 nonzeros Variable types: 0 continuous, 112 integer (112 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.943636e+01, 261 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39.43636 0 110 29.00000 39.43636 36.0% - 0s 0 0 38.60892 0 111 29.00000 38.60892 33.1% - 0s 0 0 38.33032 0 110 29.00000 38.33032 32.2% - 0s H 0 0 30.0000000 38.33032 27.8% - 0s 0 0 38.20310 0 110 30.00000 38.20310 27.3% - 0s H 0 0 31.0000000 38.20310 23.2% - 0s 0 0 38.10046 0 110 31.00000 38.10046 22.9% - 0s 0 0 38.05702 0 112 31.00000 38.05702 22.8% - 0s 0 0 37.99565 0 110 31.00000 37.99565 22.6% - 0s 0 0 37.75494 0 112 31.00000 37.75494 21.8% - 0s 0 0 37.38306 0 112 31.00000 37.38306 20.6% - 0s 0 0 37.29818 0 112 31.00000 37.29818 20.3% - 0s 0 0 37.20304 0 111 31.00000 37.20304 20.0% - 0s 0 0 37.08906 0 111 31.00000 37.08906 19.6% - 0s 0 0 37.05374 0 111 31.00000 37.05374 19.5% - 0s 0 0 36.98495 0 111 31.00000 36.98495 19.3% - 0s 0 0 36.94624 0 109 31.00000 36.94624 19.2% - 0s 0 0 36.93151 0 110 31.00000 36.93151 19.1% - 0s 0 0 36.93151 0 110 31.00000 36.93151 19.1% - 0s 0 2 36.93070 0 110 31.00000 36.93070 19.1% - 0s * 80 21 13 32.0000000 36.04762 12.6% 34.0 0s Cutting planes: Clique: 3 Zero half: 66 Explored 483 nodes (14224 simplex iterations) in 0.58 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%