current bounds on the number of colors: 0 -- 111 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:05:54 2012 Optimize a model with 33771 rows, 6717 columns and 107085 nonzeros Presolve time: 0.15s Presolved: 33771 rows, 6717 columns, 107085 nonzeros Variable types: 0 continuous, 6717 integer (6717 binary) Root relaxation: objective 0.000000e+00, 293 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 (536 simplex iterations) in 0.23 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 -- 55 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:05:54 2012 Optimize a model with 16635 rows, 3609 columns and 52569 nonzeros Presolve time: 0.07s Presolved: 16635 rows, 3609 columns, 52569 nonzeros Variable types: 0 continuous, 3609 integer (3609 binary) Root relaxation: objective 0.000000e+00, 270 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 (495 simplex iterations) in 0.10 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:05:55 2012 Optimize a model with 8067 rows, 2055 columns and 25311 nonzeros Presolve time: 0.02s Presolved: 8067 rows, 2055 columns, 25311 nonzeros Variable types: 0 continuous, 2055 integer (2055 binary) Root relaxation: objective 0.000000e+00, 229 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 (620 simplex iterations) in 0.05 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:05:55 2012 Optimize a model with 3783 rows, 1278 columns and 11682 nonzeros Presolve time: 0.01s Presolved: 3783 rows, 1278 columns, 11682 nonzeros Variable types: 0 continuous, 1278 integer (1278 binary) Root relaxation: objective 0.000000e+00, 237 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 (982 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:05:55 2012 Optimize a model with 1947 rows, 945 columns and 5841 nonzeros Presolve time: 0.00s Presolved: 1947 rows, 945 columns, 5841 nonzeros Variable types: 0 continuous, 945 integer (945 binary) Root relaxation: objective 0.000000e+00, 239 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 0 180 - 0.00000 - - 0s 0 0 0.00000 0 216 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3198 simplex iterations) in 0.24 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:05:55 2012 Optimize a model with 2559 rows, 1056 columns and 7788 nonzeros Presolve time: 0.01s Presolved: 2559 rows, 1056 columns, 7788 nonzeros Variable types: 0 continuous, 1056 integer (1056 binary) Root relaxation: objective 0.000000e+00, 243 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 0 216 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 0s 0 0 0.00000 0 317 - 0.00000 - - 0s 0 0 0.00000 0 299 - 0.00000 - - 0s 0 0 0.00000 0 317 - 0.00000 - - 0s 0 0 0.00000 0 311 - 0.00000 - - 1s 0 0 0.00000 0 316 - 0.00000 - - 1s 0 0 0.00000 0 312 - 0.00000 - - 2s 0 0 0.00000 0 297 - 0.00000 - - 2s 0 0 0.00000 0 298 - 0.00000 - - 2s 0 0 0.00000 0 293 - 0.00000 - - 3s 0 0 0.00000 0 290 - 0.00000 - - 3s 0 0 0.00000 0 288 - 0.00000 - - 3s 0 0 0.00000 0 292 - 0.00000 - - 4s 0 0 0.00000 0 292 - 0.00000 - - 4s 0 2 0.00000 0 292 - 0.00000 - - 4s 10 4 0.00000 4 304 - 0.00000 - 374 5s Cutting planes: Clique: 17 Zero half: 29 Explored 137 nodes (51806 simplex iterations) in 6.71 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:06:02 2012 Optimize a model with 3171 rows, 1167 columns and 9735 nonzeros Presolve time: 0.01s Presolved: 3171 rows, 1167 columns, 9735 nonzeros Variable types: 0 continuous, 1167 integer (1167 binary) Root relaxation: objective 0.000000e+00, 240 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 0 165 - 0.00000 - - 0s 0 0 0.00000 0 193 - 0.00000 - - 0s 0 0 0.00000 0 187 - 0.00000 - - 0s 0 0 0.00000 0 222 - 0.00000 - - 0s 0 0 0.00000 0 216 - 0.00000 - - 1s 0 0 0.00000 0 191 - 0.00000 - - 1s 0 0 0.00000 0 146 - 0.00000 - - 1s 0 0 0.00000 0 236 - 0.00000 - - 1s 0 0 0.00000 0 245 - 0.00000 - - 2s 0 0 0.00000 0 265 - 0.00000 - - 2s 0 0 0.00000 0 265 - 0.00000 - - 2s 0 2 0.00000 0 265 - 0.00000 - - 2s 610 57 0.00000 3 219 - 0.00000 - 46.4 5s 618 62 0.00000 17 203 - 0.00000 - 45.8 10s * 716 34 37 0.0000000 0.00000 0.0% 90.2 12s Cutting planes: Zero half: 8 Explored 717 nodes (89980 simplex iterations) in 12.29 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