current bounds on the number of colors: 0 -- 175 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:46:47 2012 Optimize a model with 67948 rows, 16004 columns and 218544 nonzeros Presolve time: 0.21s Presolved: 67948 rows, 16004 columns, 218544 nonzeros Variable types: 0 continuous, 16004 integer (16004 binary) Root relaxation: objective 0.000000e+00, 578 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 (955 simplex iterations) in 0.36 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 -- 87 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:46:48 2012 Optimize a model with 33672 rows, 8304 columns and 108016 nonzeros Presolve time: 0.14s Presolved: 33672 rows, 8304 columns, 108016 nonzeros Variable types: 0 continuous, 8304 integer (8304 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 (814 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 -- 43 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:46:48 2012 Optimize a model with 16534 rows, 4454 columns and 52752 nonzeros Presolve time: 0.06s Presolved: 16534 rows, 4454 columns, 52752 nonzeros Variable types: 0 continuous, 4454 integer (4454 binary) Root relaxation: objective 0.000000e+00, 356 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 (874 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:46:49 2012 Optimize a model with 7965 rows, 2529 columns and 25120 nonzeros Presolve time: 0.02s Presolved: 7965 rows, 2529 columns, 25120 nonzeros Variable types: 0 continuous, 2529 integer (2529 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (703 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 22:46:49 2012 Optimize a model with 4070 rows, 1654 columns and 12560 nonzeros Presolve time: 0.01s Presolved: 4070 rows, 1654 columns, 12560 nonzeros Variable types: 0 continuous, 1654 integer (1654 binary) Root relaxation: objective 0.000000e+00, 377 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 20 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (2954 simplex iterations) in 0.16 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 22:46:49 2012 Optimize a model with 1733 rows, 1129 columns and 5024 nonzeros Presolve removed 175 rows and 175 columns Presolve time: 0.00s Presolved: 1558 rows, 954 columns, 4674 nonzeros Variable types: 0 continuous, 954 integer (954 binary) Root relaxation: objective 0.000000e+00, 179 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 0 175 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (787 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 22:46:49 2012 Optimize a model with 2512 rows, 1304 columns and 7536 nonzeros Presolve time: 0.01s Presolved: 2512 rows, 1304 columns, 7536 nonzeros Variable types: 0 continuous, 1304 integer (1304 binary) Root relaxation: objective 0.000000e+00, 391 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 0 348 - 0.00000 - - 0s 0 0 0.00000 0 336 - 0.00000 - - 0s 0 0 0.00000 0 487 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 10 Zero half: 516 Explored 0 nodes (8038 simplex iterations) in 0.98 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 22:46:50 2012 Optimize a model with 3291 rows, 1479 columns and 10048 nonzeros Presolve time: 0.01s Presolved: 3291 rows, 1479 columns, 10048 nonzeros Variable types: 0 continuous, 1479 integer (1479 binary) Root relaxation: objective 0.000000e+00, 406 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 0 338 - 0.00000 - - 0s 0 0 0.00000 0 324 - 0.00000 - - 0s 0 0 0.00000 0 308 - 0.00000 - - 0s 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 0.00000 0 296 - 0.00000 - - 1s 0 0 0.00000 0 298 - 0.00000 - - 1s 0 0 0.00000 0 290 - 0.00000 - - 1s 0 0 0.00000 0 280 - 0.00000 - - 1s 0 0 0.00000 0 276 - 0.00000 - - 2s 0 0 0.00000 0 258 - 0.00000 - - 2s 0 0 0.00000 0 262 - 0.00000 - - 2s 0 0 0.00000 0 252 - 0.00000 - - 2s 0 0 0.00000 0 240 - 0.00000 - - 3s 0 0 0.00000 0 252 - 0.00000 - - 3s 0 0 0.00000 0 246 - 0.00000 - - 4s 0 0 0.00000 0 258 - 0.00000 - - 4s 0 0 0.00000 0 250 - 0.00000 - - 4s 0 2 0.00000 0 250 - 0.00000 - - 4s 8 8 0.00000 6 290 - 0.00000 - 312 5s 705 48 0.00000 11 309 - 0.00000 - 106 10s 710 51 0.00000 12 246 - 0.00000 - 106 15s 714 54 0.00000 15 388 - 0.00000 - 105 20s 790 58 0.00000 23 364 - 0.00000 - 179 25s 1128 55 0.00000 16 300 - 0.00000 - 192 30s 1476 75 infeasible 23 - 0.00000 - 198 35s 1809 52 infeasible 24 - 0.00000 - 204 40s 2113 36 infeasible 27 - 0.00000 - 210 45s 2400 23 infeasible 23 - 0.00000 - 215 50s 2718 13 infeasible 26 - 0.00000 - 217 55s Cutting planes: Gomory: 1 Clique: 1 Zero half: 22 Explored 2798 nodes (658861 simplex iterations) in 56.51 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