current bounds on the number of colors: 0 -- 79 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:09 2012 Optimize a model with 1522 rows, 3118 columns and 7410 nonzeros Presolve removed 29 rows and 1131 columns Presolve time: 0.02s Presolved: 1493 rows, 1987 columns, 6279 nonzeros Variable types: 0 continuous, 1987 integer (1987 binary) Root relaxation: objective 0.000000e+00, 82 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 (82 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 -- 39 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:09 2012 Optimize a model with 782 rows, 1538 columns and 3610 nonzeros Presolve removed 29 rows and 551 columns Presolve time: 0.01s Presolved: 753 rows, 987 columns, 3059 nonzeros Variable types: 0 continuous, 987 integer (987 binary) Root relaxation: objective 0.000000e+00, 82 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 (82 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 -- 19 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:09 2012 Optimize a model with 412 rows, 748 columns and 1710 nonzeros Presolve removed 29 rows and 261 columns Presolve time: 0.00s Presolved: 383 rows, 487 columns, 1449 nonzeros Variable types: 0 continuous, 487 integer (487 binary) Root relaxation: objective 0.000000e+00, 81 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 (81 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 16:14:09 2012 Optimize a model with 227 rows, 353 columns and 760 nonzeros Presolve removed 29 rows and 116 columns Presolve time: 0.00s Presolved: 198 rows, 237 columns, 644 nonzeros Variable types: 0 continuous, 237 integer (237 binary) Root relaxation: objective 0.000000e+00, 72 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 (72 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 16:14:09 2012 Optimize a model with 153 rows, 195 columns and 380 nonzeros Presolve removed 93 rows and 129 columns Presolve time: 0.00s Presolved: 60 rows, 66 columns, 180 nonzeros Variable types: 0 continuous, 66 integer (66 binary) Root relaxation: objective 0.000000e+00, 30 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 (30 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 16:14:09 2012 Optimize a model with 116 rows, 116 columns and 190 nonzeros Presolve removed 116 rows and 116 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