current bounds on the number of colors: 0 -- 112 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:08:00 2012 Optimize a model with 34944 rows, 6894 columns and 110768 nonzeros Presolve time: 0.14s Presolved: 34944 rows, 6894 columns, 110768 nonzeros Variable types: 0 continuous, 6894 integer (6894 binary) Root relaxation: objective 0.000000e+00, 298 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 (601 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 -- 56 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:08:00 2012 Optimize a model with 17528 rows, 3758 columns and 55384 nonzeros Presolve time: 0.07s Presolved: 17528 rows, 3758 columns, 55384 nonzeros Variable types: 0 continuous, 3758 integer (3758 binary) Root relaxation: objective 0.000000e+00, 269 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 (515 simplex iterations) in 0.11 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 -- 28 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:08:01 2012 Optimize a model with 8820 rows, 2190 columns and 27692 nonzeros Presolve time: 0.03s Presolved: 8820 rows, 2190 columns, 27692 nonzeros Variable types: 0 continuous, 2190 integer (2190 binary) Root relaxation: objective 0.000000e+00, 231 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 (451 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:08:01 2012 Optimize a model with 4466 rows, 1406 columns and 13846 nonzeros Presolve time: 0.01s Presolved: 4466 rows, 1406 columns, 13846 nonzeros Variable types: 0 continuous, 1406 integer (1406 binary) Root relaxation: objective 0.000000e+00, 241 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 (549 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: 0 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:08:01 2012 Optimize a model with 1978 rows, 958 columns and 5934 nonzeros Presolve time: 0.00s Presolved: 1978 rows, 958 columns, 5934 nonzeros Variable types: 0 continuous, 958 integer (958 binary) Root relaxation: objective 0.000000e+00, 242 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 0 224 - 0.00000 - - 0s 0 0 0.00000 0 245 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3649 simplex iterations) in 0.39 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 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:08:01 2012 Optimize a model with 3222 rows, 1182 columns and 9890 nonzeros Presolve time: 0.01s Presolved: 3222 rows, 1182 columns, 9890 nonzeros Variable types: 0 continuous, 1182 integer (1182 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 0 214 - 0.00000 - - 0s 0 0 0.00000 0 233 - 0.00000 - - 0s 0 0 0.00000 0 106 - 0.00000 - - 0s 0 0 0.00000 0 209 - 0.00000 - - 0s 0 0 0.00000 0 123 - 0.00000 - - 1s 0 0 0.00000 0 211 - 0.00000 - - 1s 0 0 0.00000 0 230 - 0.00000 - - 1s 0 0 0.00000 0 229 - 0.00000 - - 1s 0 2 0.00000 0 229 - 0.00000 - - 1s * 58 3 20 0.0000000 0.00000 0.0% 125 2s Cutting planes: Clique: 4 Zero half: 18 Explored 59 nodes (24397 simplex iterations) in 2.24 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:08:04 2012 Optimize a model with 2600 rows, 1070 columns and 7912 nonzeros Presolve time: 0.01s Presolved: 2600 rows, 1070 columns, 7912 nonzeros Variable types: 0 continuous, 1070 integer (1070 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 0.00000 0 216 - 0.00000 - - 0s 0 0 0.00000 0 181 - 0.00000 - - 0s 0 0 0.00000 0 332 - 0.00000 - - 0s 0 0 0.00000 0 331 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 1s 0 0 0.00000 0 315 - 0.00000 - - 1s 0 0 0.00000 0 319 - 0.00000 - - 1s 0 0 0.00000 0 313 - 0.00000 - - 2s 0 0 0.00000 0 302 - 0.00000 - - 2s 0 0 0.00000 0 315 - 0.00000 - - 3s 0 0 0.00000 0 322 - 0.00000 - - 3s 0 0 0.00000 0 312 - 0.00000 - - 3s 0 0 0.00000 0 304 - 0.00000 - - 4s 0 0 0.00000 0 298 - 0.00000 - - 4s 0 0 0.00000 0 297 - 0.00000 - - 5s 0 0 0.00000 0 321 - 0.00000 - - 5s 0 0 0.00000 0 310 - 0.00000 - - 6s 0 2 0.00000 0 310 - 0.00000 - - 6s Cutting planes: Clique: 15 Zero half: 23 Explored 31 nodes (41055 simplex iterations) in 6.87 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5