current bounds on the number of colors: 0 -- 60 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:13 2012 Optimize a model with 2730 rows, 1889 columns and 9810 nonzeros Presolve removed 2 rows and 60 columns Presolve time: 0.02s Presolved: 2728 rows, 1829 columns, 9750 nonzeros Variable types: 0 continuous, 1829 integer (1829 binary) Root relaxation: objective 0.000000e+00, 132 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 (201 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 -- 30 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:14 2012 Optimize a model with 1395 rows, 989 columns and 4905 nonzeros Presolve removed 2 rows and 30 columns Presolve time: 0.01s Presolved: 1393 rows, 959 columns, 4875 nonzeros Variable types: 0 continuous, 959 integer (959 binary) Root relaxation: objective 0.000000e+00, 117 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 (199 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 -- 15 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:14 2012 Optimize a model with 683 rows, 509 columns and 2289 nonzeros Presolve removed 2 rows and 14 columns Presolve time: 0.00s Presolved: 681 rows, 495 columns, 2275 nonzeros Variable types: 0 continuous, 495 integer (495 binary) Root relaxation: objective 0.000000e+00, 116 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 (169 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 18:20:14 2012 Optimize a model with 327 rows, 269 columns and 981 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 325 rows, 263 columns, 975 nonzeros Variable types: 0 continuous, 263 integer (263 binary) Root relaxation: objective 0.000000e+00, 132 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 (209 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 18:20:14 2012 Optimize a model with 149 rows, 149 columns and 327 nonzeros Presolve removed 149 rows and 149 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 18:20:14 2012 Optimize a model with 238 rows, 209 columns and 654 nonzeros Presolve removed 60 rows and 62 columns Presolve time: 0.00s Presolved: 178 rows, 147 columns, 534 nonzeros Variable types: 0 continuous, 147 integer (147 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 0.00000 0 58 - 0.00000 - - 0s Explored 0 nodes (225 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