current bounds on the number of colors: 0 -- 160 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:51 2012 Optimize a model with 50640 rows, 13431 columns and 164240 nonzeros Presolve time: 0.16s Presolved: 50640 rows, 13431 columns, 164240 nonzeros Variable types: 0 continuous, 13431 integer (13431 binary) Root relaxation: objective 0.000000e+00, 583 iterations, 0.05 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 (950 simplex iterations) in 0.28 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 -- 80 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:52 2012 Optimize a model with 25400 rows, 7031 columns and 82120 nonzeros Presolve time: 0.13s Presolved: 25400 rows, 7031 columns, 82120 nonzeros Variable types: 0 continuous, 7031 integer (7031 binary) Root relaxation: objective 0.000000e+00, 467 iterations, 0.02 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 (794 simplex iterations) in 0.18 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 -- 40 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:53 2012 Optimize a model with 12780 rows, 3831 columns and 41060 nonzeros Presolve time: 0.05s Presolved: 12780 rows, 3831 columns, 41060 nonzeros Variable types: 0 continuous, 3831 integer (3831 binary) Root relaxation: objective 0.000000e+00, 327 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 (611 simplex iterations) in 0.07 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 -- 20 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:53 2012 Optimize a model with 6470 rows, 2231 columns and 20530 nonzeros Presolve time: 0.02s Presolved: 6470 rows, 2231 columns, 20530 nonzeros Variable types: 0 continuous, 2231 integer (2231 binary) Root relaxation: objective 0.000000e+00, 341 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 (620 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:53 2012 Optimize a model with 3315 rows, 1431 columns and 10265 nonzeros Presolve time: 0.01s Presolved: 3315 rows, 1431 columns, 10265 nonzeros Variable types: 0 continuous, 1431 integer (1431 binary) Root relaxation: objective 0.000000e+00, 361 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 (1581 simplex iterations) in 0.05 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:53 2012 Optimize a model with 1422 rows, 951 columns and 4106 nonzeros Presolve removed 160 rows and 160 columns Presolve time: 0.00s Presolved: 1262 rows, 791 columns, 3786 nonzeros Variable types: 0 continuous, 791 integer (791 binary) Root relaxation: objective 0.000000e+00, 173 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 0 160 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (669 simplex iterations) in 0.02 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:53 2012 Optimize a model with 2053 rows, 1111 columns and 6159 nonzeros Presolve time: 0.01s Presolved: 2053 rows, 1111 columns, 6159 nonzeros Variable types: 0 continuous, 1111 integer (1111 binary) Root relaxation: objective 0.000000e+00, 356 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 0 308 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 310 - 0.00000 - - 0s 0 0 0.00000 0 441 - 0.00000 - - 0s 0 0 0.00000 0 418 - 0.00000 - - 0s 0 0 0.00000 0 424 - 0.00000 - - 1s 0 0 0.00000 0 376 - 0.00000 - - 1s 0 0 0.00000 0 420 - 0.00000 - - 2s 0 0 0.00000 0 320 - 0.00000 - - 2s 0 0 0.00000 0 409 - 0.00000 - - 3s 0 0 0.00000 0 423 - 0.00000 - - 3s 0 0 0.00000 0 423 - 0.00000 - - 3s 0 2 0.00000 0 423 - 0.00000 - - 3s Cutting planes: Zero half: 27 Explored 3 nodes (26191 simplex iterations) in 3.76 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 19:19:57 2012 Optimize a model with 2684 rows, 1271 columns and 8212 nonzeros Presolve time: 0.01s Presolved: 2684 rows, 1271 columns, 8212 nonzeros Variable types: 0 continuous, 1271 integer (1271 binary) Root relaxation: objective 0.000000e+00, 383 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 276 - 0.00000 - - 0s 0 0 0.00000 0 268 - 0.00000 - - 0s 0 0 0.00000 0 294 - 0.00000 - - 0s 0 0 0.00000 0 306 - 0.00000 - - 0s 0 0 0.00000 0 280 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Zero half: 35 Explored 0 nodes (12110 simplex iterations) in 0.91 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: 4