current bounds on the number of colors: 0 -- 109 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:15 2012 Optimize a model with 31969 rows, 6476 columns and 101466 nonzeros Presolve time: 0.15s Presolved: 31969 rows, 6476 columns, 101466 nonzeros Variable types: 0 continuous, 6476 integer (6476 binary) Root relaxation: objective 0.000000e+00, 356 iterations, 0.02 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 (597 simplex iterations) in 0.22 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 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:15 2012 Optimize a model with 16039 rows, 3533 columns and 50733 nonzeros Presolve time: 0.07s Presolved: 16039 rows, 3533 columns, 50733 nonzeros Variable types: 0 continuous, 3533 integer (3533 binary) Root relaxation: objective 0.000000e+00, 264 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 (481 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 20:02:16 2012 Optimize a model with 7779 rows, 2007 columns and 24427 nonzeros Presolve time: 0.02s Presolved: 7779 rows, 2007 columns, 24427 nonzeros Variable types: 0 continuous, 2007 integer (2007 binary) Root relaxation: objective 0.000000e+00, 228 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 (444 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:02:16 2012 Optimize a model with 3649 rows, 1244 columns and 11274 nonzeros Presolve time: 0.01s Presolved: 3649 rows, 1244 columns, 11274 nonzeros Variable types: 0 continuous, 1244 integer (1244 binary) Root relaxation: objective 0.000000e+00, 230 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 (876 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 20:02:16 2012 Optimize a model with 1879 rows, 917 columns and 5637 nonzeros Presolve time: 0.00s Presolved: 1879 rows, 917 columns, 5637 nonzeros Variable types: 0 continuous, 917 integer (917 binary) Root relaxation: objective 0.000000e+00, 253 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 0 216 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2880 simplex iterations) in 0.29 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 20:02:16 2012 Optimize a model with 2469 rows, 1026 columns and 7516 nonzeros Presolve time: 0.01s Presolved: 2469 rows, 1026 columns, 7516 nonzeros Variable types: 0 continuous, 1026 integer (1026 binary) Root relaxation: objective 0.000000e+00, 248 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 0 116 - 0.00000 - - 0s 0 0 0.00000 0 168 - 0.00000 - - 0s 0 0 0.00000 0 301 - 0.00000 - - 0s 0 0 0.00000 0 297 - 0.00000 - - 0s 0 0 0.00000 0 295 - 0.00000 - - 1s 0 0 0.00000 0 287 - 0.00000 - - 1s 0 0 0.00000 0 299 - 0.00000 - - 1s 0 0 0.00000 0 295 - 0.00000 - - 1s 0 0 0.00000 0 288 - 0.00000 - - 1s 0 0 0.00000 0 282 - 0.00000 - - 2s 0 0 0.00000 0 277 - 0.00000 - - 2s 0 0 0.00000 0 277 - 0.00000 - - 2s 0 0 0.00000 0 279 - 0.00000 - - 3s 0 0 0.00000 0 305 - 0.00000 - - 3s 0 0 0.00000 0 305 - 0.00000 - - 3s 0 2 0.00000 0 305 - 0.00000 - - 4s 78 8 0.00000 6 288 - 0.00000 - 143 5s Cutting planes: Clique: 5 Zero half: 31 Explored 149 nodes (49110 simplex iterations) in 5.81 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 20:02:22 2012 Optimize a model with 3059 rows, 1135 columns and 9395 nonzeros Presolve time: 0.01s Presolved: 3059 rows, 1135 columns, 9395 nonzeros Variable types: 0 continuous, 1135 integer (1135 binary) Root relaxation: objective 0.000000e+00, 231 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 0 206 - 0.00000 - - 0s 0 0 0.00000 0 218 - 0.00000 - - 0s 0 0 0.00000 0 223 - 0.00000 - - 0s 0 0 0.00000 0 271 - 0.00000 - - 0s 0 0 0.00000 0 253 - 0.00000 - - 0s 0 0 0.00000 0 278 - 0.00000 - - 1s 0 0 0.00000 0 275 - 0.00000 - - 1s 0 2 0.00000 0 275 - 0.00000 - - 1s * 103 3 29 0.0000000 0.00000 0.0% 72.2 1s Cutting planes: Gomory: 7 Clique: 2 Zero half: 6 Explored 104 nodes (21435 simplex iterations) in 1.82 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