current bounds on the number of colors: 0 -- 144 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:04 2012 Optimize a model with 8208 rows, 10480 columns and 34560 nonzeros Presolve removed 30 rows and 2160 columns Presolve time: 0.10s Presolved: 8178 rows, 8320 columns, 32400 nonzeros Variable types: 0 continuous, 8320 integer (8320 binary) Root relaxation: objective 0.000000e+00, 214 iterations, 0.01 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 (311 simplex iterations) in 0.12 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 -- 72 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:05 2012 Optimize a model with 4176 rows, 5296 columns and 17280 nonzeros Presolve removed 30 rows and 1080 columns Presolve time: 0.03s Presolved: 4146 rows, 4216 columns, 16200 nonzeros Variable types: 0 continuous, 4216 integer (4216 binary) Root relaxation: objective 0.000000e+00, 207 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 (306 simplex iterations) in 0.04 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 -- 36 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:05 2012 Optimize a model with 2160 rows, 2704 columns and 8640 nonzeros Presolve removed 30 rows and 540 columns Presolve time: 0.01s Presolved: 2130 rows, 2164 columns, 8100 nonzeros Variable types: 0 continuous, 2164 integer (2164 binary) Root relaxation: objective 0.000000e+00, 210 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 (302 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:05 2012 Optimize a model with 1152 rows, 1408 columns and 4320 nonzeros Presolve removed 30 rows and 270 columns Presolve time: 0.00s Presolved: 1122 rows, 1138 columns, 4050 nonzeros Variable types: 0 continuous, 1138 integer (1138 binary) Root relaxation: objective 0.000000e+00, 184 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 (184 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 -- 9 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:05 2012 Optimize a model with 592 rows, 688 columns and 1920 nonzeros Presolve removed 30 rows and 120 columns Presolve time: 0.00s Presolved: 562 rows, 568 columns, 1800 nonzeros Variable types: 0 continuous, 568 integer (568 binary) Root relaxation: objective 0.000000e+00, 176 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 (176 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 16:19:05 2012 Optimize a model with 368 rows, 400 columns and 960 nonzeros Presolve removed 150 rows and 183 columns Presolve time: 0.00s Presolved: 218 rows, 217 columns, 654 nonzeros Variable types: 0 continuous, 217 integer (217 binary) Root relaxation: objective 0.000000e+00, 107 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 80 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (323 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:05 2012 Optimize a model with 480 rows, 544 columns and 1440 nonzeros Presolve removed 30 rows and 90 columns Presolve time: 0.00s Presolved: 450 rows, 454 columns, 1350 nonzeros Variable types: 0 continuous, 454 integer (454 binary) Root relaxation: objective 0.000000e+00, 185 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 (185 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: 3