current bounds on the number of colors: 0 -- 178 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:56:26 2012 Optimize a model with 69776 rows, 16624 columns and 224636 nonzeros Presolve time: 0.22s Presolved: 69776 rows, 16624 columns, 224636 nonzeros Variable types: 0 continuous, 16624 integer (16624 binary) Root relaxation: objective 0.000000e+00, 695 iterations, 0.07 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 (1078 simplex iterations) in 0.39 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 -- 89 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:56:28 2012 Optimize a model with 34586 rows, 8614 columns and 111056 nonzeros Presolve time: 0.15s Presolved: 34586 rows, 8614 columns, 111056 nonzeros Variable types: 0 continuous, 8614 integer (8614 binary) Root relaxation: objective 0.000000e+00, 501 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 (872 simplex iterations) in 0.22 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 -- 44 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:56:28 2012 Optimize a model with 17382 rows, 4698 columns and 55528 nonzeros Presolve time: 0.07s Presolved: 17382 rows, 4698 columns, 55528 nonzeros Variable types: 0 continuous, 4698 integer (4698 binary) Root relaxation: objective 0.000000e+00, 378 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 (695 simplex iterations) in 0.10 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 -- 22 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:56:29 2012 Optimize a model with 8780 rows, 2740 columns and 27764 nonzeros Presolve time: 0.03s Presolved: 8780 rows, 2740 columns, 27764 nonzeros Variable types: 0 continuous, 2740 integer (2740 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (696 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 23:56:29 2012 Optimize a model with 4088 rows, 1672 columns and 12620 nonzeros Presolve time: 0.01s Presolved: 4088 rows, 1672 columns, 12620 nonzeros Variable types: 0 continuous, 1672 integer (1672 binary) Root relaxation: objective 0.000000e+00, 392 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 (3505 simplex iterations) in 0.21 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 23:56:29 2012 Optimize a model with 1742 rows, 1138 columns and 5048 nonzeros Presolve removed 178 rows and 178 columns Presolve time: 0.00s Presolved: 1564 rows, 960 columns, 4692 nonzeros Variable types: 0 continuous, 960 integer (960 binary) Root relaxation: objective 0.000000e+00, 188 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 0 178 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (753 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 23:56:29 2012 Optimize a model with 2524 rows, 1316 columns and 7572 nonzeros Presolve time: 0.01s Presolved: 2524 rows, 1316 columns, 7572 nonzeros Variable types: 0 continuous, 1316 integer (1316 binary) Root relaxation: objective 0.000000e+00, 405 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 0 350 - 0.00000 - - 0s 0 0 0.00000 0 350 - 0.00000 - - 0s 0 0 0.00000 0 441 - 0.00000 - - 0s 0 0 0.00000 0 459 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Clique: 1 Zero half: 892 Explored 0 nodes (8546 simplex iterations) in 1.05 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 23:56:30 2012 Optimize a model with 3306 rows, 1494 columns and 10096 nonzeros Presolve time: 0.01s Presolved: 3306 rows, 1494 columns, 10096 nonzeros Variable types: 0 continuous, 1494 integer (1494 binary) Root relaxation: objective 0.000000e+00, 398 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 0 344 - 0.00000 - - 0s 0 0 0.00000 0 336 - 0.00000 - - 0s 0 0 0.00000 0 326 - 0.00000 - - 0s 0 0 0.00000 0 359 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 0s 0 0 0.00000 0 298 - 0.00000 - - 1s 0 0 0.00000 0 300 - 0.00000 - - 1s 0 0 0.00000 0 298 - 0.00000 - - 1s 0 0 0.00000 0 292 - 0.00000 - - 2s 0 0 0.00000 0 284 - 0.00000 - - 2s 0 0 0.00000 0 296 - 0.00000 - - 2s 0 0 0.00000 0 268 - 0.00000 - - 2s 0 0 0.00000 0 272 - 0.00000 - - 3s 0 0 0.00000 0 272 - 0.00000 - - 3s 0 2 0.00000 0 272 - 0.00000 - - 3s 289 39 infeasible 19 - 0.00000 - 91.2 5s 608 61 0.00000 7 275 - 0.00000 - 86.5 10s 613 64 0.00000 21 401 - 0.00000 - 85.8 15s 953 38 infeasible 26 - 0.00000 - 168 20s 1368 59 0.00000 31 313 - 0.00000 - 178 25s 1754 57 0.00000 25 354 - 0.00000 - 187 30s 2104 41 infeasible 24 - 0.00000 - 194 35s 2479 54 infeasible 24 - 0.00000 - 198 40s 2850 43 0.00000 25 326 - 0.00000 - 201 45s 3194 31 infeasible 27 - 0.00000 - 205 50s Cutting planes: Clique: 2 Zero half: 2 Explored 3517 nodes (763899 simplex iterations) in 54.74 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 5