current bounds on the number of colors: 0 -- 101 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:13 2012 Optimize a model with 2351 rows, 5095 columns and 11800 nonzeros Presolve removed 43 rows and 2150 columns Presolve time: 0.03s Presolved: 2308 rows, 2945 columns, 9650 nonzeros Variable types: 0 continuous, 2945 integer (2945 binary) Root relaxation: objective 0.000000e+00, 98 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 (98 simplex iterations) in 0.03 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 -- 50 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:13 2012 Optimize a model with 1226 rows, 2570 columns and 5900 nonzeros Presolve removed 43 rows and 1075 columns Presolve time: 0.01s Presolved: 1183 rows, 1495 columns, 4825 nonzeros Variable types: 0 continuous, 1495 integer (1495 binary) Root relaxation: objective 0.000000e+00, 97 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 (97 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 -- 25 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:13 2012 Optimize a model with 641 rows, 1257 columns and 2832 nonzeros Presolve removed 43 rows and 516 columns Presolve time: 0.00s Presolved: 598 rows, 741 columns, 2316 nonzeros Variable types: 0 continuous, 741 integer (741 binary) Root relaxation: objective 0.000000e+00, 93 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 (93 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 -- 12 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:13 2012 Optimize a model with 371 rows, 651 columns and 1416 nonzeros Presolve removed 43 rows and 258 columns Presolve time: 0.00s Presolved: 328 rows, 393 columns, 1158 nonzeros Variable types: 0 continuous, 393 integer (393 binary) Root relaxation: objective 0.000000e+00, 88 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 (88 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 -- 6 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:15:13 2012 Optimize a model with 236 rows, 348 columns and 708 nonzeros Presolve removed 43 rows and 129 columns Presolve time: 0.00s Presolved: 193 rows, 219 columns, 579 nonzeros Variable types: 0 continuous, 219 integer (219 binary) Root relaxation: objective 0.000000e+00, 81 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 (81 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 16:15:13 2012 Optimize a model with 146 rows, 146 columns and 236 nonzeros Presolve removed 146 rows and 146 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 16:15:13 2012 Optimize a model with 191 rows, 247 columns and 472 nonzeros Presolve removed 113 rows and 162 columns Presolve time: 0.00s Presolved: 78 rows, 85 columns, 234 nonzeros Variable types: 0 continuous, 85 integer (85 binary) Root relaxation: objective 0.000000e+00, 33 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 (33 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