current bounds on the number of colors: 0 -- 67 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:47 2012 Optimize a model with 760 rows, 2232 columns and 4290 nonzeros Presolve removed 35 rows and 1155 columns Presolve time: 0.01s Presolved: 725 rows, 1077 columns, 3135 nonzeros Variable types: 0 continuous, 1077 integer (1077 binary) Root relaxation: objective 0.000000e+00, 52 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 (52 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 -- 33 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:47 2012 Optimize a model with 403 rows, 1093 columns and 2080 nonzeros Presolve removed 35 rows and 560 columns Presolve time: 0.00s Presolved: 368 rows, 533 columns, 1520 nonzeros Variable types: 0 continuous, 533 integer (533 binary) Root relaxation: objective 0.000000e+00, 52 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 (52 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 -- 16 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:47 2012 Optimize a model with 235 rows, 557 columns and 1040 nonzeros Presolve removed 35 rows and 280 columns Presolve time: 0.00s Presolved: 200 rows, 277 columns, 760 nonzeros Variable types: 0 continuous, 277 integer (277 binary) Root relaxation: objective 0.000000e+00, 48 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 (48 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 -- 8 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:47 2012 Optimize a model with 151 rows, 289 columns and 520 nonzeros Presolve removed 35 rows and 140 columns Presolve time: 0.00s Presolved: 116 rows, 149 columns, 380 nonzeros Variable types: 0 continuous, 149 integer (149 binary) Root relaxation: objective 0.000000e+00, 44 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 (44 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 16:13:47 2012 Optimize a model with 109 rows, 155 columns and 260 nonzeros Presolve removed 75 rows and 114 columns Presolve time: 0.00s Presolved: 34 rows, 41 columns, 102 nonzeros Variable types: 0 continuous, 41 integer (41 binary) Root relaxation: objective 0.000000e+00, 15 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 (15 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 16:13:47 2012 Optimize a model with 88 rows, 88 columns and 130 nonzeros Presolve removed 88 rows and 88 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