Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:17 2012 Optimize a model with 671 rows, 116 columns and 1342 nonzeros Presolve removed 255 rows and 0 columns Presolve time: 0.00s Presolved: 416 rows, 116 columns, 1050 nonzeros Variable types: 0 continuous, 116 integer (116 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 3.990909e+01, 242 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 39.90909 0 107 30.00000 39.90909 33.0% - 0s 0 0 39.33303 0 113 30.00000 39.33303 31.1% - 0s 0 0 39.19285 0 111 30.00000 39.19285 30.6% - 0s 0 0 38.80613 0 113 30.00000 38.80613 29.4% - 0s 0 0 38.72485 0 111 30.00000 38.72485 29.1% - 0s 0 0 38.63877 0 113 30.00000 38.63877 28.8% - 0s 0 0 38.32316 0 114 30.00000 38.32316 27.7% - 0s 0 0 38.10205 0 109 30.00000 38.10205 27.0% - 0s 0 0 37.97526 0 113 30.00000 37.97526 26.6% - 0s 0 0 37.95232 0 114 30.00000 37.95232 26.5% - 0s 0 0 37.94761 0 113 30.00000 37.94761 26.5% - 0s 0 0 37.88442 0 112 30.00000 37.88442 26.3% - 0s 0 0 37.85302 0 113 30.00000 37.85302 26.2% - 0s 0 0 37.84514 0 113 30.00000 37.84514 26.2% - 0s 0 0 37.84514 0 113 30.00000 37.84514 26.2% - 0s 0 2 37.84330 0 113 30.00000 37.84330 26.1% - 0s H 19 12 32.0000000 37.83759 18.2% 35.9 0s 612 99 34.17647 4 109 32.00000 35.03132 9.47% 30.3 5s 627 109 33.57143 9 111 32.00000 35.03132 9.47% 29.6 10s Cutting planes: Clique: 2 Zero half: 52 Explored 1690 nodes (49368 simplex iterations) in 12.71 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%