current bounds on the number of colors: 0 -- 31

Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:27 2012

Optimize a model with 496 rows, 496 columns and 1860 nonzeros
Presolve removed 3 rows and 45 columns
Presolve time: 0.00s
Presolved: 493 rows, 451 columns, 1815 nonzeros
Variable types: 0 continuous, 451 integer (451 binary)

Root relaxation: objective 0.000000e+00, 47 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 (47 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 -- 15

Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:27 2012

Optimize a model with 248 rows, 248 columns and 868 nonzeros
Presolve removed 3 rows and 21 columns
Presolve time: 0.00s
Presolved: 245 rows, 227 columns, 847 nonzeros
Variable types: 0 continuous, 227 integer (227 binary)

Root relaxation: objective 0.000000e+00, 49 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 (49 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 -- 7

Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:27 2012

Optimize a model with 124 rows, 124 columns and 372 nonzeros
Presolve removed 3 rows and 9 columns
Presolve time: 0.00s
Presolved: 121 rows, 115 columns, 363 nonzeros
Variable types: 0 continuous, 115 integer (115 binary)

Root relaxation: objective 0.000000e+00, 43 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 (43 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 18:19:27 2012

Optimize a model with 62 rows, 62 columns and 124 nonzeros
Presolve removed 62 rows and 62 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 18:19:27 2012

Optimize a model with 93 rows, 93 columns and 248 nonzeros
Presolve removed 31 rows and 34 columns
Presolve time: 0.00s
Presolved: 62 rows, 59 columns, 186 nonzeros
Variable types: 0 continuous, 59 integer (59 binary)

Root relaxation: objective 0.000000e+00, 22 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 (22 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