current bounds on the number of colors: 0 -- 75 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:02 2012 Optimize a model with 1259 rows, 2807 columns and 6327 nonzeros Presolve removed 29 rows and 1073 columns Presolve time: 0.01s Presolved: 1230 rows, 1734 columns, 5254 nonzeros Variable types: 0 continuous, 1734 integer (1734 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 0.01 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 -- 37 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:02 2012 Optimize a model with 651 rows, 1382 columns and 3078 nonzeros Presolve removed 29 rows and 522 columns Presolve time: 0.00s Presolved: 622 rows, 860 columns, 2556 nonzeros Variable types: 0 continuous, 860 integer (860 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 0.01 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:02 2012 Optimize a model with 363 rows, 707 columns and 1539 nonzeros Presolve removed 29 rows and 261 columns Presolve time: 0.00s Presolved: 334 rows, 446 columns, 1278 nonzeros Variable types: 0 continuous, 446 integer (446 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 0.00 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 16:14:02 2012 Optimize a model with 203 rows, 332 columns and 684 nonzeros Presolve removed 29 rows and 116 columns Presolve time: 0.00s Presolved: 174 rows, 216 columns, 568 nonzeros Variable types: 0 continuous, 216 integer (216 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 16:14:02 2012 Optimize a model with 139 rows, 182 columns and 342 nonzeros Presolve removed 93 rows and 131 columns Presolve time: 0.00s Presolved: 46 rows, 51 columns, 138 nonzeros Variable types: 0 continuous, 51 integer (51 binary) Root relaxation: objective 0.000000e+00, 21 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 (21 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 16:14:02 2012 Optimize a model with 107 rows, 107 columns and 171 nonzeros Presolve removed 107 rows and 107 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