current bounds on the number of colors: 0 -- 120 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:02:20 2012 Optimize a model with 42720 rows, 7910 columns and 135000 nonzeros Presolve time: 0.16s Presolved: 42720 rows, 7910 columns, 135000 nonzeros Variable types: 0 continuous, 7910 integer (7910 binary) Root relaxation: objective 0.000000e+00, 297 iterations, 0.05 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 (559 simplex iterations) in 0.27 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 -- 60 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:02:20 2012 Optimize a model with 21420 rows, 4310 columns and 67500 nonzeros Presolve time: 0.09s Presolved: 21420 rows, 4310 columns, 67500 nonzeros Variable types: 0 continuous, 4310 integer (4310 binary) Root relaxation: objective 0.000000e+00, 287 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 (541 simplex iterations) in 0.13 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 -- 30 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:02:21 2012 Optimize a model with 10770 rows, 2510 columns and 33750 nonzeros Presolve time: 0.04s Presolved: 10770 rows, 2510 columns, 33750 nonzeros Variable types: 0 continuous, 2510 integer (2510 binary) Root relaxation: objective 0.000000e+00, 243 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 (499 simplex iterations) in 0.06 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 -- 15 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 21:02:21 2012 Optimize a model with 5090 rows, 1550 columns and 15750 nonzeros Presolve time: 0.01s Presolved: 5090 rows, 1550 columns, 15750 nonzeros Variable types: 0 continuous, 1550 integer (1550 binary) Root relaxation: objective 0.000000e+00, 245 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 (1221 simplex iterations) in 0.06 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 21:02:21 2012 Optimize a model with 2250 rows, 1070 columns and 6750 nonzeros Presolve time: 0.01s Presolved: 2250 rows, 1070 columns, 6750 nonzeros Variable types: 0 continuous, 1070 integer (1070 binary) Root relaxation: objective 0.000000e+00, 268 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 0 200 - 0.00000 - - 0s 0 0 0.00000 0 238 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3638 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 21:02:22 2012 Optimize a model with 3670 rows, 1310 columns and 11250 nonzeros Presolve time: 0.01s Presolved: 3670 rows, 1310 columns, 11250 nonzeros Variable types: 0 continuous, 1310 integer (1310 binary) Root relaxation: objective 0.000000e+00, 257 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 0 232 - 0.00000 - - 0s 0 0 0.00000 0 228 - 0.00000 - - 0s 0 0 0.00000 0 281 - 0.00000 - - 0s 0 0 0.00000 0 297 - 0.00000 - - 0s 0 0 0.00000 0 148 - 0.00000 - - 1s 0 0 0.00000 0 171 - 0.00000 - - 1s 0 0 0.00000 0 225 - 0.00000 - - 2s 0 0 0.00000 0 223 - 0.00000 - - 2s 0 0 0.00000 0 190 - 0.00000 - - 2s 0 0 0.00000 0 256 - 0.00000 - - 2s 0 0 0.00000 0 199 - 0.00000 - - 3s 0 2 0.00000 0 199 - 0.00000 - - 3s 147 95 0.00000 25 174 - 0.00000 - 121 5s 608 226 0.00000 21 231 - 0.00000 - 87.0 10s * 657 204 34 0.0000000 0.00000 0.0% 125 13s Cutting planes: Zero half: 4 Explored 658 nodes (110885 simplex iterations) in 13.89 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 21:02:36 2012 Optimize a model with 2960 rows, 1190 columns and 9000 nonzeros Presolve time: 0.01s Presolved: 2960 rows, 1190 columns, 9000 nonzeros Variable types: 0 continuous, 1190 integer (1190 binary) Root relaxation: objective 0.000000e+00, 268 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 0 238 - 0.00000 - - 0s 0 0 0.00000 0 234 - 0.00000 - - 0s 0 0 0.00000 0 351 - 0.00000 - - 0s 0 0 0.00000 0 347 - 0.00000 - - 1s 0 0 0.00000 0 348 - 0.00000 - - 1s 0 0 0.00000 0 338 - 0.00000 - - 2s 0 0 0.00000 0 339 - 0.00000 - - 2s 0 0 0.00000 0 332 - 0.00000 - - 3s 0 0 0.00000 0 328 - 0.00000 - - 3s 0 0 0.00000 0 327 - 0.00000 - - 4s 0 0 0.00000 0 345 - 0.00000 - - 4s 0 0 0.00000 0 345 - 0.00000 - - 4s 0 2 0.00000 0 345 - 0.00000 - - 5s Cutting planes: Clique: 9 Zero half: 36 Explored 19 nodes (33042 simplex iterations) in 5.71 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