current bounds on the number of colors: 0 -- 135 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:53 2012 Optimize a model with 31089 rows, 9507 columns and 101907 nonzeros Presolve time: 0.15s Presolved: 31089 rows, 9507 columns, 101907 nonzeros Variable types: 0 continuous, 9507 integer (9507 binary) Root relaxation: objective 0.000000e+00, 477 iterations, 0.03 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 (849 simplex iterations) in 0.24 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 -- 67 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:53 2012 Optimize a model with 15381 rows, 4917 columns and 50193 nonzeros Presolve time: 0.08s Presolved: 15381 rows, 4917 columns, 50193 nonzeros Variable types: 0 continuous, 4917 integer (4917 binary) Root relaxation: objective 0.000000e+00, 342 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 (607 simplex iterations) in 0.11 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 -- 33 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:54 2012 Optimize a model with 7527 rows, 2622 columns and 24336 nonzeros Presolve time: 0.03s Presolved: 7527 rows, 2622 columns, 24336 nonzeros Variable types: 0 continuous, 2622 integer (2622 binary) Root relaxation: objective 0.000000e+00, 272 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 (506 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 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:54 2012 Optimize a model with 3831 rows, 1542 columns and 12168 nonzeros Presolve time: 0.01s Presolved: 3831 rows, 1542 columns, 12168 nonzeros Variable types: 0 continuous, 1542 integer (1542 binary) Root relaxation: objective 0.000000e+00, 296 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 (554 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:54 2012 Optimize a model with 1983 rows, 1002 columns and 6084 nonzeros Presolve time: 0.01s Presolved: 1983 rows, 1002 columns, 6084 nonzeros Variable types: 0 continuous, 1002 integer (1002 binary) Root relaxation: objective 0.000000e+00, 311 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 0 174 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1860 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:36:54 2012 Optimize a model with 1059 rows, 732 columns and 3042 nonzeros Presolve removed 135 rows and 135 columns Presolve time: 0.00s Presolved: 924 rows, 597 columns, 2772 nonzeros Variable types: 0 continuous, 597 integer (597 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 0.00000 0 135 - 0.00000 - - 0s Explored 0 nodes (542 simplex iterations) in 0.01 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 Fri Dec 14 18:36:54 2012 Optimize a model with 1521 rows, 867 columns and 4563 nonzeros Presolve time: 0.00s Presolved: 1521 rows, 867 columns, 4563 nonzeros Variable types: 0 continuous, 867 integer (867 binary) Root relaxation: objective 0.000000e+00, 302 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 0 258 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 292 - 0.00000 - - 0s 0 0 0.00000 0 349 - 0.00000 - - 0s 0 0 0.00000 0 301 - 0.00000 - - 0s 0 0 0.00000 0 287 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 0 0.00000 0 328 - 0.00000 - - 1s 0 0 0.00000 0 238 - 0.00000 - - 1s 0 0 0.00000 0 284 - 0.00000 - - 1s 0 0 0.00000 0 282 - 0.00000 - - 1s 0 2 0.00000 0 278 - 0.00000 - - 1s Cutting planes: Clique: 2 Zero half: 17 Explored 3 nodes (16077 simplex iterations) in 1.47 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4