current bounds on the number of colors: 0 -- 27

Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:24 2012

Optimize a model with 287 rows, 371 columns and 1131 nonzeros
Presolve removed 5 rows and 65 columns
Presolve time: 0.00s
Presolved: 282 rows, 306 columns, 1066 nonzeros
Variable types: 0 continuous, 306 integer (306 binary)

Root relaxation: objective 0.000000e+00, 36 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 (36 simplex iterations) in 0.00 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 Fri Dec 14 18:19:24 2012

Optimize a model with 147 rows, 182 columns and 522 nonzeros
Presolve removed 5 rows and 30 columns
Presolve time: 0.00s
Presolved: 142 rows, 152 columns, 492 nonzeros
Variable types: 0 continuous, 152 integer (152 binary)

Root relaxation: objective 0.000000e+00, 38 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 (38 simplex iterations) in 0.00 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 Fri Dec 14 18:19:24 2012

Optimize a model with 87 rows, 101 columns and 261 nonzeros
Presolve removed 5 rows and 15 columns
Presolve time: 0.00s
Presolved: 82 rows, 86 columns, 246 nonzeros
Variable types: 0 continuous, 86 integer (86 binary)

Root relaxation: objective 0.000000e+00, 33 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 (33 simplex iterations) in 0.00 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 -- 3

Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:24 2012

Optimize a model with 47 rows, 47 columns and 87 nonzeros
Presolve removed 47 rows and 47 columns
Presolve time: 0.00s

Explored 0 nodes (0 simplex iterations) in 0.00 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: 1 -- 3

Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:24 2012

Optimize a model with 67 rows, 74 columns and 174 nonzeros
Presolve removed 31 rows and 38 columns
Presolve time: 0.00s
Presolved: 36 rows, 36 columns, 108 nonzeros
Variable types: 0 continuous, 36 integer (36 binary)

Root relaxation: objective 0.000000e+00, 14 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 (14 simplex iterations) in 0.00 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: 2