current bounds on the number of colors: 0 -- 156 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:58:08 2012 Optimize a model with 51948 rows, 12832 columns and 167544 nonzeros Presolve time: 0.17s Presolved: 51948 rows, 12832 columns, 167544 nonzeros Variable types: 0 continuous, 12832 integer (12832 binary) Root relaxation: objective 0.000000e+00, 549 iterations, 0.04 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (879 simplex iterations) in 0.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 78 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:58:09 2012 Optimize a model with 26052 rows, 6748 columns and 83772 nonzeros Presolve time: 0.13s Presolved: 26052 rows, 6748 columns, 83772 nonzeros Variable types: 0 continuous, 6748 integer (6748 binary) Root relaxation: objective 0.000000e+00, 400 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (700 simplex iterations) in 0.18 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 39 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:58:10 2012 Optimize a model with 12772 rows, 3628 columns and 40812 nonzeros Presolve time: 0.05s Presolved: 12772 rows, 3628 columns, 40812 nonzeros Variable types: 0 continuous, 3628 integer (3628 binary) Root relaxation: objective 0.000000e+00, 330 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (608 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 19 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:58:10 2012 Optimize a model with 6132 rows, 2068 columns and 19332 nonzeros Presolve time: 0.02s Presolved: 6132 rows, 2068 columns, 19332 nonzeros Variable types: 0 continuous, 2068 integer (2068 binary) Root relaxation: objective 0.000000e+00, 345 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (657 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:58:10 2012 Optimize a model with 2812 rows, 1288 columns and 8592 nonzeros Presolve time: 0.01s Presolved: 2812 rows, 1288 columns, 8592 nonzeros Variable types: 0 continuous, 1288 integer (1288 binary) Root relaxation: objective 0.000000e+00, 366 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 296 - 0.00000 - - 0s 0 0 0.00000 0 304 - 0.00000 - - 0s 0 0 0.00000 0 268 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 238 - 0.00000 - - 0s 0 0 0.00000 0 242 - 0.00000 - - 0s 0 0 0.00000 0 248 - 0.00000 - - 1s 0 0 0.00000 0 214 - 0.00000 - - 1s 0 0 0.00000 0 216 - 0.00000 - - 1s 0 0 0.00000 0 216 - 0.00000 - - 1s 0 2 0.00000 0 216 - 0.00000 - - 2s 805 72 0.00000 8 248 - 0.00000 - 69.7 5s 825 85 0.00000 21 318 - 0.00000 - 103 10s 1505 38 0.00000 26 243 - 0.00000 - 122 15s 2058 55 infeasible 29 - 0.00000 - 135 20s 2641 66 0.00000 26 259 - 0.00000 - 142 25s 3211 60 infeasible 32 - 0.00000 - 146 30s 3742 45 infeasible 25 - 0.00000 - 150 35s 4256 17 0.00000 25 317 - 0.00000 - 153 40s 4751 10 infeasible 32 - 0.00000 - 155 45s Cutting planes: Clique: 1 Zero half: 6 Explored 4944 nodes (792684 simplex iterations) in 46.83 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 4 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:58:57 2012 Optimize a model with 4140 rows, 1600 columns and 12888 nonzeros Presolve time: 0.01s Presolved: 4140 rows, 1600 columns, 12888 nonzeros Variable types: 0 continuous, 1600 integer (1600 binary) Root relaxation: objective 0.000000e+00, 327 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (757 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 4 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:58:57 2012 Optimize a model with 3476 rows, 1444 columns and 10740 nonzeros Presolve time: 0.01s Presolved: 3476 rows, 1444 columns, 10740 nonzeros Variable types: 0 continuous, 1444 integer (1444 binary) Root relaxation: objective 0.000000e+00, 330 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 104 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2167 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% optimal solution found: number of colors: 5