current bounds on the number of colors: 0 -- 72 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:57 2012 Optimize a model with 1080 rows, 2620 columns and 5616 nonzeros Presolve removed 30 rows and 1080 columns Presolve time: 0.01s Presolved: 1050 rows, 1540 columns, 4536 nonzeros Variable types: 0 continuous, 1540 integer (1540 binary) Root relaxation: objective 0.000000e+00, 69 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 (69 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 -- 36 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:57 2012 Optimize a model with 576 rows, 1324 columns and 2808 nonzeros Presolve removed 30 rows and 540 columns Presolve time: 0.00s Presolved: 546 rows, 784 columns, 2268 nonzeros Variable types: 0 continuous, 784 integer (784 binary) Root relaxation: objective 0.000000e+00, 69 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 (69 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:57 2012 Optimize a model with 324 rows, 676 columns and 1404 nonzeros Presolve removed 30 rows and 270 columns Presolve time: 0.00s Presolved: 294 rows, 406 columns, 1134 nonzeros Variable types: 0 continuous, 406 integer (406 binary) Root relaxation: objective 0.000000e+00, 69 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 (69 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:57 2012 Optimize a model with 184 rows, 316 columns and 624 nonzeros Presolve removed 30 rows and 120 columns Presolve time: 0.00s Presolved: 154 rows, 196 columns, 504 nonzeros Variable types: 0 continuous, 196 integer (196 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (59 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 16:13:57 2012 Optimize a model with 128 rows, 172 columns and 312 nonzeros Presolve removed 84 rows and 120 columns Presolve time: 0.00s Presolved: 44 rows, 52 columns, 132 nonzeros Variable types: 0 continuous, 52 integer (52 binary) Root relaxation: objective 0.000000e+00, 17 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 (17 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 16:13:57 2012 Optimize a model with 100 rows, 100 columns and 156 nonzeros Presolve removed 100 rows and 100 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