current bounds on the number of colors: 0 -- 64 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:41 2012 Optimize a model with 896 rows, 2074 columns and 4544 nonzeros Presolve removed 25 rows and 800 columns Presolve time: 0.01s Presolved: 871 rows, 1274 columns, 3744 nonzeros Variable types: 0 continuous, 1274 integer (1274 binary) Root relaxation: objective 0.000000e+00, 61 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 (61 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 -- 32 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:41 2012 Optimize a model with 480 rows, 1050 columns and 2272 nonzeros Presolve removed 25 rows and 400 columns Presolve time: 0.00s Presolved: 455 rows, 650 columns, 1872 nonzeros Variable types: 0 continuous, 650 integer (650 binary) Root relaxation: objective 0.000000e+00, 62 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 (62 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 -- 16 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:41 2012 Optimize a model with 272 rows, 538 columns and 1136 nonzeros Presolve removed 25 rows and 200 columns Presolve time: 0.00s Presolved: 247 rows, 338 columns, 936 nonzeros Variable types: 0 continuous, 338 integer (338 binary) Root relaxation: objective 0.000000e+00, 61 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 (61 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 -- 8 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:41 2012 Optimize a model with 168 rows, 282 columns and 568 nonzeros Presolve removed 25 rows and 100 columns Presolve time: 0.00s Presolved: 143 rows, 182 columns, 468 nonzeros Variable types: 0 continuous, 182 integer (182 binary) Root relaxation: objective 0.000000e+00, 53 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 (53 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 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:41 2012 Optimize a model with 116 rows, 154 columns and 284 nonzeros Presolve removed 80 rows and 113 columns Presolve time: 0.00s Presolved: 36 rows, 41 columns, 108 nonzeros Variable types: 0 continuous, 41 integer (41 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% current bounds on the number of colors: 0 -- 2 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:41 2012 Optimize a model with 90 rows, 90 columns and 142 nonzeros Presolve removed 90 rows and 90 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 - optimal solution found: number of colors: 2