current bounds on the number of colors: 0 -- 115 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:08 2012 Optimize a model with 4333 rows, 6629 columns and 19209 nonzeros Presolve removed 31 rows and 1767 columns Presolve time: 0.05s Presolved: 4302 rows, 4862 columns, 17442 nonzeros Variable types: 0 continuous, 4862 integer (4862 binary) Root relaxation: objective 0.000000e+00, 141 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 (141 simplex iterations) in 0.06 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 -- 57 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:08 2012 Optimize a model with 2187 rows, 3294 columns and 9436 nonzeros Presolve removed 31 rows and 868 columns Presolve time: 0.02s Presolved: 2156 rows, 2426 columns, 8568 nonzeros Variable types: 0 continuous, 2426 integer (2426 binary) Root relaxation: objective 0.000000e+00, 142 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 (142 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 -- 28 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:08 2012 Optimize a model with 1151 rows, 1684 columns and 4718 nonzeros Presolve removed 31 rows and 434 columns Presolve time: 0.01s Presolved: 1120 rows, 1250 columns, 4284 nonzeros Variable types: 0 continuous, 1250 integer (1250 binary) Root relaxation: objective 0.000000e+00, 142 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 (142 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 -- 14 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:08 2012 Optimize a model with 633 rows, 879 columns and 2359 nonzeros Presolve removed 31 rows and 217 columns Presolve time: 0.00s Presolved: 602 rows, 662 columns, 2142 nonzeros Variable types: 0 continuous, 662 integer (662 binary) Root relaxation: objective 0.000000e+00, 137 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 (137 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 -- 7 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:08 2012 Optimize a model with 337 rows, 419 columns and 1011 nonzeros Presolve removed 31 rows and 93 columns Presolve time: 0.00s Presolved: 306 rows, 326 columns, 918 nonzeros Variable types: 0 continuous, 326 integer (326 binary) Root relaxation: objective 0.000000e+00, 117 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 (117 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 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:08 2012 Optimize a model with 189 rows, 189 columns and 337 nonzeros Presolve removed 189 rows and 189 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 - current bounds on the number of colors: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:08 2012 Optimize a model with 263 rows, 304 columns and 674 nonzeros Presolve removed 127 rows and 164 columns Presolve time: 0.00s Presolved: 136 rows, 140 columns, 408 nonzeros Variable types: 0 continuous, 140 integer (140 binary) Root relaxation: objective 0.000000e+00, 47 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 (47 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% optimal solution found: number of colors: 2