current bounds on the number of colors: 0 -- 180 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:11 2012 Optimize a model with 14400 rows, 16358 columns and 58860 nonzeros Presolve removed 33 rows and 2970 columns Presolve time: 0.12s Presolved: 14367 rows, 13388 columns, 55890 nonzeros Variable types: 0 continuous, 13388 integer (13388 binary) Root relaxation: objective 0.000000e+00, 273 iterations, 0.01 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 (273 simplex iterations) in 0.13 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 -- 90 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:11 2012 Optimize a model with 7290 rows, 8258 columns and 29430 nonzeros Presolve removed 33 rows and 1485 columns Presolve time: 0.07s Presolved: 7257 rows, 6773 columns, 27945 nonzeros Variable types: 0 continuous, 6773 integer (6773 binary) Root relaxation: objective 0.000000e+00, 268 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 (268 simplex iterations) in 0.07 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 -- 45 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:12 2012 Optimize a model with 3656 rows, 4118 columns and 14388 nonzeros Presolve removed 33 rows and 726 columns Presolve time: 0.02s Presolved: 3623 rows, 3392 columns, 13662 nonzeros Variable types: 0 continuous, 3392 integer (3392 binary) Root relaxation: objective 0.000000e+00, 270 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 (390 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 -- 22 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:12 2012 Optimize a model with 1918 rows, 2138 columns and 7194 nonzeros Presolve removed 33 rows and 363 columns Presolve time: 0.01s Presolved: 1885 rows, 1775 columns, 6831 nonzeros Variable types: 0 continuous, 1775 integer (1775 binary) Root relaxation: objective 0.000000e+00, 255 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 (255 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 -- 11 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:12 2012 Optimize a model with 970 rows, 1058 columns and 3270 nonzeros Presolve removed 33 rows and 165 columns Presolve time: 0.00s Presolved: 937 rows, 893 columns, 3105 nonzeros Variable types: 0 continuous, 893 integer (893 binary) Root relaxation: objective 0.000000e+00, 241 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 (241 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:12 2012 Optimize a model with 496 rows, 518 columns and 1308 nonzeros Presolve removed 186 rows and 222 columns Presolve time: 0.00s Presolved: 310 rows, 296 columns, 930 nonzeros Variable types: 0 continuous, 296 integer (296 binary) Root relaxation: objective 0.000000e+00, 159 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 0 135 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (493 simplex iterations) in 0.01 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 -- 5 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:25:12 2012 Optimize a model with 654 rows, 698 columns and 1962 nonzeros Presolve removed 33 rows and 99 columns Presolve time: 0.00s Presolved: 621 rows, 599 columns, 1863 nonzeros Variable types: 0 continuous, 599 integer (599 binary) Root relaxation: objective 0.000000e+00, 249 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 (249 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