current bounds on the number of colors: 0 -- 135 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:59 2012 Optimize a model with 6232 rows, 9136 columns and 27336 nonzeros Presolve removed 33 rows and 2211 columns Presolve time: 0.08s Presolved: 6199 rows, 6925 columns, 25125 nonzeros Variable types: 0 continuous, 6925 integer (6925 binary) Root relaxation: objective 0.000000e+00, 173 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 (173 simplex iterations) in 0.09 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 -- 67 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:59 2012 Optimize a model with 3138 rows, 4546 columns and 13464 nonzeros Presolve removed 33 rows and 1089 columns Presolve time: 0.03s Presolved: 3105 rows, 3457 columns, 12375 nonzeros Variable types: 0 continuous, 3457 integer (3457 binary) Root relaxation: objective 0.000000e+00, 175 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 (175 simplex iterations) in 0.03 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 -- 33 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:59 2012 Optimize a model with 1591 rows, 2251 columns and 6528 nonzeros Presolve removed 33 rows and 528 columns Presolve time: 0.01s Presolved: 1558 rows, 1723 columns, 6000 nonzeros Variable types: 0 continuous, 1723 integer (1723 binary) Root relaxation: objective 0.000000e+00, 175 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 (175 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 -- 16 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:59 2012 Optimize a model with 863 rows, 1171 columns and 3264 nonzeros Presolve removed 33 rows and 264 columns Presolve time: 0.00s Presolved: 830 rows, 907 columns, 3000 nonzeros Variable types: 0 continuous, 907 integer (907 binary) Root relaxation: objective 0.000000e+00, 162 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 (162 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 16:17:59 2012 Optimize a model with 499 rows, 631 columns and 1632 nonzeros Presolve removed 33 rows and 132 columns Presolve time: 0.00s Presolved: 466 rows, 499 columns, 1500 nonzeros Variable types: 0 continuous, 499 integer (499 binary) Root relaxation: objective 0.000000e+00, 148 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 (148 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 16:17:59 2012 Optimize a model with 317 rows, 361 columns and 816 nonzeros Presolve removed 139 rows and 174 columns Presolve time: 0.00s Presolved: 178 rows, 187 columns, 534 nonzeros Variable types: 0 continuous, 187 integer (187 binary) Root relaxation: objective 0.000000e+00, 74 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 33 - 0.00000 - - 0s Explored 0 nodes (220 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 - current bounds on the number of colors: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:59 2012 Optimize a model with 408 rows, 496 columns and 1224 nonzeros Presolve removed 33 rows and 99 columns Presolve time: 0.00s Presolved: 375 rows, 397 columns, 1125 nonzeros Variable types: 0 continuous, 397 integer (397 binary) Root relaxation: objective 0.000000e+00, 146 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 (146 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: 3