current bounds on the number of colors: 0 -- 168 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:39:43 2012 Optimize a model with 59808 rows, 14822 columns and 193032 nonzeros Presolve time: 0.18s Presolved: 59808 rows, 14822 columns, 193032 nonzeros Variable types: 0 continuous, 14822 integer (14822 binary) Root relaxation: objective 0.000000e+00, 661 iterations, 0.06 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 (1044 simplex iterations) in 0.33 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 -- 84 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:39:44 2012 Optimize a model with 29988 rows, 7766 columns and 96516 nonzeros Presolve time: 0.14s Presolved: 29988 rows, 7766 columns, 96516 nonzeros Variable types: 0 continuous, 7766 integer (7766 binary) Root relaxation: objective 0.000000e+00, 468 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 (802 simplex iterations) in 0.20 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:39:45 2012 Optimize a model with 15078 rows, 4238 columns and 48258 nonzeros Presolve time: 0.06s Presolved: 15078 rows, 4238 columns, 48258 nonzeros Variable types: 0 continuous, 4238 integer (4238 binary) Root relaxation: objective 0.000000e+00, 336 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 (633 simplex iterations) in 0.09 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:39:45 2012 Optimize a model with 7268 rows, 2390 columns and 22980 nonzeros Presolve time: 0.02s Presolved: 7268 rows, 2390 columns, 22980 nonzeros Variable types: 0 continuous, 2390 integer (2390 binary) Root relaxation: objective 0.000000e+00, 362 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 (651 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 20:39:45 2012 Optimize a model with 3718 rows, 1550 columns and 11490 nonzeros Presolve time: 0.01s Presolved: 3718 rows, 1550 columns, 11490 nonzeros Variable types: 0 continuous, 1550 integer (1550 binary) Root relaxation: objective 0.000000e+00, 373 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 (1465 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 20:39:45 2012 Optimize a model with 1588 rows, 1046 columns and 4596 nonzeros Presolve removed 168 rows and 168 columns Presolve time: 0.00s Presolved: 1420 rows, 878 columns, 4260 nonzeros Variable types: 0 continuous, 878 integer (878 binary) Root relaxation: objective 0.000000e+00, 175 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 0 168 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (730 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 20:39:45 2012 Optimize a model with 2298 rows, 1214 columns and 6894 nonzeros Presolve time: 0.01s Presolved: 2298 rows, 1214 columns, 6894 nonzeros Variable types: 0 continuous, 1214 integer (1214 binary) Root relaxation: objective 0.000000e+00, 404 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 0 326 - 0.00000 - - 0s 0 0 0.00000 0 332 - 0.00000 - - 0s 0 0 0.00000 0 427 - 0.00000 - - 0s 0 0 0.00000 0 468 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 2 Zero half: 476 Explored 0 nodes (6827 simplex iterations) in 0.83 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:39:46 2012 Optimize a model with 3008 rows, 1382 columns and 9192 nonzeros Presolve time: 0.01s Presolved: 3008 rows, 1382 columns, 9192 nonzeros Variable types: 0 continuous, 1382 integer (1382 binary) Root relaxation: objective 0.000000e+00, 415 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 0 310 - 0.00000 - - 0s 0 0 0.00000 0 302 - 0.00000 - - 0s 0 0 0.00000 0 401 - 0.00000 - - 0s 0 0 0.00000 0 394 - 0.00000 - - 0s 0 0 0.00000 0 398 - 0.00000 - - 0s 0 0 0.00000 0 344 - 0.00000 - - 1s 0 2 0.00000 0 344 - 0.00000 - - 1s 713 93 0.00000 19 386 - 0.00000 - 83.1 5s 721 98 0.00000 27 317 - 0.00000 - 82.1 10s 728 103 0.00000 11 336 - 0.00000 - 81.4 15s 1065 80 infeasible 25 - 0.00000 - 142 20s * 1519 1 32 0.0000000 0.00000 0.0% 155 24s Cutting planes: Zero half: 16 Explored 1520 nodes (246721 simplex iterations) in 24.63 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