current bounds on the number of colors: 0 -- 76 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:04 2012 Optimize a model with 1330 rows, 2921 columns and 6650 nonzeros Presolve removed 29 rows and 1102 columns Presolve time: 0.01s Presolved: 1301 rows, 1819 columns, 5548 nonzeros Variable types: 0 continuous, 1819 integer (1819 binary) Root relaxation: objective 0.000000e+00, 75 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 (75 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 -- 38 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:04 2012 Optimize a model with 703 rows, 1477 columns and 3325 nonzeros Presolve removed 29 rows and 551 columns Presolve time: 0.00s Presolved: 674 rows, 926 columns, 2774 nonzeros Variable types: 0 continuous, 926 integer (926 binary) Root relaxation: objective 0.000000e+00, 75 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 (75 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 16:14:04 2012 Optimize a model with 373 rows, 717 columns and 1575 nonzeros Presolve removed 29 rows and 261 columns Presolve time: 0.00s Presolved: 344 rows, 456 columns, 1314 nonzeros Variable types: 0 continuous, 456 integer (456 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:04 2012 Optimize a model with 208 rows, 337 columns and 700 nonzeros Presolve removed 29 rows and 116 columns Presolve time: 0.00s Presolved: 179 rows, 221 columns, 584 nonzeros Variable types: 0 continuous, 221 integer (221 binary) Root relaxation: objective 0.000000e+00, 65 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 (65 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 16:14:04 2012 Optimize a model with 142 rows, 185 columns and 350 nonzeros Presolve removed 94 rows and 132 columns Presolve time: 0.00s Presolved: 48 rows, 53 columns, 144 nonzeros Variable types: 0 continuous, 53 integer (53 binary) Root relaxation: objective 0.000000e+00, 19 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 (19 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 16:14:04 2012 Optimize a model with 109 rows, 109 columns and 175 nonzeros Presolve removed 109 rows and 109 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