current bounds on the number of colors: 0 -- 125 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:59 2012 Optimize a model with 4403 rows, 7819 columns and 20584 nonzeros Presolve removed 38 rows and 2356 columns Presolve time: 0.06s Presolved: 4365 rows, 5463 columns, 18228 nonzeros Variable types: 0 continuous, 5463 integer (5463 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 -- 62 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:59 2012 Optimize a model with 2264 rows, 3944 columns and 10292 nonzeros Presolve removed 38 rows and 1178 columns Presolve time: 0.02s Presolved: 2226 rows, 2766 columns, 9114 nonzeros Variable types: 0 continuous, 2766 integer (2766 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 -- 31 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:59 2012 Optimize a model with 1160 rows, 1944 columns and 4980 nonzeros Presolve removed 38 rows and 570 columns Presolve time: 0.01s Presolved: 1122 rows, 1374 columns, 4410 nonzeros Variable types: 0 continuous, 1374 integer (1374 binary) Root relaxation: objective 0.000000e+00, 147 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 (147 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 -- 15 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:16:59 2012 Optimize a model with 608 rows, 944 columns and 2324 nonzeros Presolve removed 38 rows and 266 columns Presolve time: 0.00s Presolved: 570 rows, 678 columns, 2058 nonzeros Variable types: 0 continuous, 678 integer (678 binary) Root relaxation: objective 0.000000e+00, 135 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 (135 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 16:16:59 2012 Optimize a model with 332 rows, 444 columns and 996 nonzeros Presolve removed 38 rows and 114 columns Presolve time: 0.00s Presolved: 294 rows, 330 columns, 882 nonzeros Variable types: 0 continuous, 330 integer (330 binary) Root relaxation: objective 0.000000e+00, 126 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 (126 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 16:16:59 2012 Optimize a model with 194 rows, 194 columns and 332 nonzeros Presolve removed 194 rows and 194 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 16:16:59 2012 Optimize a model with 263 rows, 319 columns and 664 nonzeros Presolve removed 143 rows and 190 columns Presolve time: 0.00s Presolved: 120 rows, 129 columns, 360 nonzeros Variable types: 0 continuous, 129 integer (129 binary) Root relaxation: objective 0.000000e+00, 50 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 (50 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