current bounds on the number of colors: 0 -- 84 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:23 2012 Optimize a model with 1848 rows, 3570 columns and 8820 nonzeros Presolve removed 30 rows and 1260 columns Presolve time: 0.02s Presolved: 1818 rows, 2310 columns, 7560 nonzeros Variable types: 0 continuous, 2310 integer (2310 binary) Root relaxation: objective 0.000000e+00, 86 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 (86 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 -- 42 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:23 2012 Optimize a model with 966 rows, 1806 columns and 4410 nonzeros Presolve removed 30 rows and 630 columns Presolve time: 0.01s Presolved: 936 rows, 1176 columns, 3780 nonzeros Variable types: 0 continuous, 1176 integer (1176 binary) Root relaxation: objective 0.000000e+00, 86 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 (86 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 -- 21 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:23 2012 Optimize a model with 504 rows, 882 columns and 2100 nonzeros Presolve removed 30 rows and 300 columns Presolve time: 0.00s Presolved: 474 rows, 582 columns, 1800 nonzeros Variable types: 0 continuous, 582 integer (582 binary) Root relaxation: objective 0.000000e+00, 84 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 (84 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 -- 10 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:23 2012 Optimize a model with 294 rows, 462 columns and 1050 nonzeros Presolve removed 30 rows and 150 columns Presolve time: 0.00s Presolved: 264 rows, 312 columns, 900 nonzeros Variable types: 0 continuous, 312 integer (312 binary) Root relaxation: objective 0.000000e+00, 80 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 (80 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 16:14:23 2012 Optimize a model with 168 rows, 210 columns and 420 nonzeros Presolve removed 96 rows and 132 columns Presolve time: 0.00s Presolved: 72 rows, 78 columns, 216 nonzeros Variable types: 0 continuous, 78 integer (78 binary) Root relaxation: objective 0.000000e+00, 26 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 (26 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 16:14:23 2012 Optimize a model with 126 rows, 126 columns and 210 nonzeros Presolve removed 126 rows and 126 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