current bounds on the number of colors: 0 -- 108 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:01:32 2012 Optimize a model with 34884 rows, 6476 columns and 110160 nonzeros Presolve time: 0.15s Presolved: 34884 rows, 6476 columns, 110160 nonzeros Variable types: 0 continuous, 6476 integer (6476 binary) Root relaxation: objective 0.000000e+00, 267 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 (512 simplex iterations) in 0.24 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: 0 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:01:32 2012 Optimize a model with 17496 rows, 3560 columns and 55080 nonzeros Presolve time: 0.07s Presolved: 17496 rows, 3560 columns, 55080 nonzeros Variable types: 0 continuous, 3560 integer (3560 binary) Root relaxation: objective 0.000000e+00, 232 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 (456 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 20:01:32 2012 Optimize a model with 8480 rows, 2048 columns and 26520 nonzeros Presolve time: 0.03s Presolved: 8480 rows, 2048 columns, 26520 nonzeros Variable types: 0 continuous, 2048 integer (2048 binary) Root relaxation: objective 0.000000e+00, 220 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 (420 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 20:01:33 2012 Optimize a model with 3972 rows, 1292 columns and 12240 nonzeros Presolve time: 0.01s Presolved: 3972 rows, 1292 columns, 12240 nonzeros Variable types: 0 continuous, 1292 integer (1292 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 0 121 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1444 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 -- 6 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 20:01:33 2012 Optimize a model with 2040 rows, 968 columns and 6120 nonzeros Presolve time: 0.00s Presolved: 2040 rows, 968 columns, 6120 nonzeros Variable types: 0 continuous, 968 integer (968 binary) Root relaxation: objective 0.000000e+00, 232 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 0 212 - 0.00000 - - 0s 0 0 0.00000 0 214 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2998 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 20:01:33 2012 Optimize a model with 2684 rows, 1076 columns and 8160 nonzeros Presolve time: 0.01s Presolved: 2684 rows, 1076 columns, 8160 nonzeros Variable types: 0 continuous, 1076 integer (1076 binary) Root relaxation: objective 0.000000e+00, 238 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 0 259 - 0.00000 - - 0s 0 0 0.00000 0 329 - 0.00000 - - 0s 0 0 0.00000 0 323 - 0.00000 - - 0s 0 0 0.00000 0 319 - 0.00000 - - 1s 0 0 0.00000 0 315 - 0.00000 - - 1s 0 0 0.00000 0 313 - 0.00000 - - 1s 0 0 0.00000 0 312 - 0.00000 - - 1s 0 0 0.00000 0 311 - 0.00000 - - 1s 0 0 0.00000 0 312 - 0.00000 - - 1s 0 0 0.00000 0 316 - 0.00000 - - 2s 0 0 0.00000 0 312 - 0.00000 - - 2s 0 0 0.00000 0 314 - 0.00000 - - 3s 0 0 0.00000 0 311 - 0.00000 - - 3s 0 0 0.00000 0 308 - 0.00000 - - 4s 0 0 0.00000 0 317 - 0.00000 - - 4s 0 0 0.00000 0 317 - 0.00000 - - 4s 0 2 0.00000 0 317 - 0.00000 - - 5s Cutting planes: Clique: 9 Zero half: 17 Explored 19 nodes (28341 simplex iterations) in 5.79 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 20:01:39 2012 Optimize a model with 3328 rows, 1184 columns and 10200 nonzeros Presolve time: 0.01s Presolved: 3328 rows, 1184 columns, 10200 nonzeros Variable types: 0 continuous, 1184 integer (1184 binary) Root relaxation: objective 0.000000e+00, 234 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 0 210 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 0s 0 0 0.00000 0 277 - 0.00000 - - 0s 0 0 0.00000 0 283 - 0.00000 - - 0s 0 0 0.00000 0 210 - 0.00000 - - 1s 0 0 0.00000 0 238 - 0.00000 - - 1s 0 0 0.00000 0 282 - 0.00000 - - 1s 0 0 0.00000 0 273 - 0.00000 - - 2s 0 2 0.00000 0 273 - 0.00000 - - 2s * 595 2 30 0.0000000 0.00000 0.0% 59.9 3s Cutting planes: Clique: 8 Zero half: 8 Explored 596 nodes (53447 simplex iterations) in 3.92 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