current bounds on the number of colors: 0 -- 57 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:06 2012 Optimize a model with 2129 rows, 1670 columns and 7812 nonzeros Presolve removed 3 rows and 84 columns Presolve time: 0.01s Presolved: 2126 rows, 1586 columns, 7728 nonzeros Variable types: 0 continuous, 1586 integer (1586 binary) Root relaxation: objective 0.000000e+00, 104 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 (104 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 -- 28 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:07 2012 Optimize a model with 1093 rows, 872 columns and 3906 nonzeros Presolve removed 3 rows and 42 columns Presolve time: 0.00s Presolved: 1090 rows, 830 columns, 3864 nonzeros Variable types: 0 continuous, 830 integer (830 binary) Root relaxation: objective 0.000000e+00, 99 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 (99 simplex iterations) in 0.01 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 -- 14 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:07 2012 Optimize a model with 575 rows, 473 columns and 1953 nonzeros Presolve removed 3 rows and 21 columns Presolve time: 0.00s Presolved: 572 rows, 452 columns, 1932 nonzeros Variable types: 0 continuous, 452 integer (452 binary) Root relaxation: objective 0.000000e+00, 103 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 (153 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 18:20:07 2012 Optimize a model with 279 rows, 245 columns and 837 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 276 rows, 236 columns, 828 nonzeros Variable types: 0 continuous, 236 integer (236 binary) Root relaxation: objective 0.000000e+00, 105 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 (105 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 18:20:07 2012 Optimize a model with 131 rows, 131 columns and 279 nonzeros Presolve removed 131 rows and 131 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 18:20:07 2012 Optimize a model with 205 rows, 188 columns and 558 nonzeros Presolve removed 57 rows and 60 columns Presolve time: 0.00s Presolved: 148 rows, 128 columns, 444 nonzeros Variable types: 0 continuous, 128 integer (128 binary) Root relaxation: objective 0.000000e+00, 59 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 54 - 0.00000 - - 0s Explored 0 nodes (217 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 3