current bounds on the number of colors: 0 -- 134 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:26 2012 Optimize a model with 28341 rows, 9399 columns and 93599 nonzeros Presolve time: 0.14s Presolved: 28341 rows, 9399 columns, 93599 nonzeros Variable types: 0 continuous, 9399 integer (9399 binary) Root relaxation: objective 0.000000e+00, 422 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 (753 simplex iterations) in 0.21 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 -- 67 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:27 2012 Optimize a model with 14027 rows, 4843 columns and 46101 nonzeros Presolve time: 0.07s Presolved: 14027 rows, 4843 columns, 46101 nonzeros Variable types: 0 continuous, 4843 integer (4843 binary) Root relaxation: objective 0.000000e+00, 362 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 (362 simplex iterations) in 0.09 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 -- 33 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:27 2012 Optimize a model with 6870 rows, 2565 columns and 22352 nonzeros Presolve time: 0.02s Presolved: 6870 rows, 2565 columns, 22352 nonzeros Variable types: 0 continuous, 2565 integer (2565 binary) Root relaxation: objective 0.000000e+00, 305 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 (526 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:27 2012 Optimize a model with 3502 rows, 1493 columns and 11176 nonzeros Presolve time: 0.01s Presolved: 3502 rows, 1493 columns, 11176 nonzeros Variable types: 0 continuous, 1493 integer (1493 binary) Root relaxation: objective 0.000000e+00, 289 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 (646 simplex iterations) in 0.02 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:27 2012 Optimize a model with 1818 rows, 957 columns and 5588 nonzeros Presolve time: 0.00s Presolved: 1818 rows, 957 columns, 5588 nonzeros Variable types: 0 continuous, 957 integer (957 binary) Root relaxation: objective 0.000000e+00, 338 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 0 114 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2443 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:27 2012 Optimize a model with 976 rows, 689 columns and 2794 nonzeros Presolve removed 134 rows and 134 columns Presolve time: 0.00s Presolved: 842 rows, 555 columns, 2526 nonzeros Variable types: 0 continuous, 555 integer (555 binary) Root relaxation: objective 0.000000e+00, 138 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 0 134 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (546 simplex iterations) in 0.01 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: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:27 2012 Optimize a model with 1397 rows, 823 columns and 4191 nonzeros Presolve time: 0.00s Presolved: 1397 rows, 823 columns, 4191 nonzeros Variable types: 0 continuous, 823 integer (823 binary) Root relaxation: objective 0.000000e+00, 314 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 0 256 - 0.00000 - - 0s 0 0 0.00000 0 260 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 330 - 0.00000 - - 0s 0 0 0.00000 0 285 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 312 - 0.00000 - - 0s 0 0 0.00000 0 295 - 0.00000 - - 1s 0 0 0.00000 0 308 - 0.00000 - - 1s 0 0 0.00000 0 307 - 0.00000 - - 1s 0 2 0.00000 0 307 - 0.00000 - - 1s Cutting planes: Zero half: 15 Explored 7 nodes (16027 simplex iterations) in 1.36 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4