current bounds on the number of colors: 0 -- 171 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:17:41 2012 Optimize a model with 65536 rows, 15304 columns and 210630 nonzeros Presolve time: 0.20s Presolved: 65536 rows, 15304 columns, 210630 nonzeros Variable types: 0 continuous, 15304 integer (15304 binary) Root relaxation: objective 0.000000e+00, 693 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 (1106 simplex iterations) in 0.37 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 -- 85 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:17:42 2012 Optimize a model with 32469 rows, 7951 columns and 104076 nonzeros Presolve time: 0.14s Presolved: 32469 rows, 7951 columns, 104076 nonzeros Variable types: 0 continuous, 7951 integer (7951 binary) Root relaxation: objective 0.000000e+00, 480 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 (849 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 21:17:42 2012 Optimize a model with 16320 rows, 4360 columns and 52038 nonzeros Presolve time: 0.06s Presolved: 16320 rows, 4360 columns, 52038 nonzeros Variable types: 0 continuous, 4360 integer (4360 binary) Root relaxation: objective 0.000000e+00, 399 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 (746 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 21:17:43 2012 Optimize a model with 7861 rows, 2479 columns and 24780 nonzeros Presolve time: 0.02s Presolved: 7861 rows, 2479 columns, 24780 nonzeros Variable types: 0 continuous, 2479 integer (2479 binary) Root relaxation: objective 0.000000e+00, 358 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 (669 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 21:17:43 2012 Optimize a model with 4016 rows, 1624 columns and 12390 nonzeros Presolve time: 0.01s Presolved: 4016 rows, 1624 columns, 12390 nonzeros Variable types: 0 continuous, 1624 integer (1624 binary) Root relaxation: objective 0.000000e+00, 370 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 0 147 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (3483 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 21:17:43 2012 Optimize a model with 1709 rows, 1111 columns and 4956 nonzeros Presolve removed 171 rows and 171 columns Presolve time: 0.00s Presolved: 1538 rows, 940 columns, 4614 nonzeros Variable types: 0 continuous, 940 integer (940 binary) Root relaxation: objective 0.000000e+00, 174 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 0 171 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (743 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 21:17:43 2012 Optimize a model with 2478 rows, 1282 columns and 7434 nonzeros Presolve time: 0.01s Presolved: 2478 rows, 1282 columns, 7434 nonzeros Variable types: 0 continuous, 1282 integer (1282 binary) Root relaxation: objective 0.000000e+00, 370 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 0 338 - 0.00000 - - 0s 0 0 0.00000 0 342 - 0.00000 - - 0s 0 0 0.00000 0 455 - 0.00000 - - 0s 0 0 0.00000 0 486 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Gomory: 2 Zero half: 478 Explored 0 nodes (7615 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 21:17:44 2012 Optimize a model with 3247 rows, 1453 columns and 9912 nonzeros Presolve time: 0.01s Presolved: 3247 rows, 1453 columns, 9912 nonzeros Variable types: 0 continuous, 1453 integer (1453 binary) Root relaxation: objective 0.000000e+00, 413 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 0 320 - 0.00000 - - 0s 0 0 0.00000 0 282 - 0.00000 - - 0s 0 0 0.00000 0 322 - 0.00000 - - 0s 0 0 0.00000 0 328 - 0.00000 - - 0s 0 0 0.00000 0 389 - 0.00000 - - 1s 0 0 0.00000 0 376 - 0.00000 - - 1s 0 0 0.00000 0 390 - 0.00000 - - 2s 0 0 0.00000 0 385 - 0.00000 - - 2s 0 2 0.00000 0 367 - 0.00000 - - 3s 354 20 infeasible 14 - 0.00000 - 108 5s 609 44 0.00000 16 385 - 0.00000 - 113 10s 865 49 infeasible 27 - 0.00000 - 160 15s 1283 33 infeasible 26 - 0.00000 - 172 20s 1705 57 infeasible 29 - 0.00000 - 177 25s 2149 45 0.00000 30 302 - 0.00000 - 180 30s 2514 16 0.00000 27 282 - 0.00000 - 184 35s 2916 10 0.00000 30 296 - 0.00000 - 186 40s 3358 8 0.00000 28 326 - 0.00000 - 186 45s Cutting planes: Gomory: 2 Zero half: 11 Explored 3629 nodes (696599 simplex iterations) in 48.51 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