current bounds on the number of colors: 0 -- 187 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:44:14 2012 Optimize a model with 81469 rows, 18265 columns and 261237 nonzeros Presolve time: 0.25s Presolved: 81469 rows, 18265 columns, 261237 nonzeros Variable types: 0 continuous, 18265 integer (18265 binary) Root relaxation: objective 0.000000e+00, 734 iterations, 0.08 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 (1172 simplex iterations) in 0.46 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 -- 93 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:44:15 2012 Optimize a model with 40391 rows, 9476 columns and 129214 nonzeros Presolve time: 0.16s Presolved: 40391 rows, 9476 columns, 129214 nonzeros Variable types: 0 continuous, 9476 integer (9476 binary) Root relaxation: objective 0.000000e+00, 490 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 (880 simplex iterations) in 0.23 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 -- 46 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:44:16 2012 Optimize a model with 20289 rows, 5175 columns and 64607 nonzeros Presolve time: 0.08s Presolved: 20289 rows, 5175 columns, 64607 nonzeros Variable types: 0 continuous, 5175 integer (5175 binary) Root relaxation: objective 0.000000e+00, 412 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 (738 simplex iterations) in 0.12 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 -- 23 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:44:17 2012 Optimize a model with 9801 rows, 2931 columns and 30899 nonzeros Presolve time: 0.03s Presolved: 9801 rows, 2931 columns, 30899 nonzeros Variable types: 0 continuous, 2931 integer (2931 binary) Root relaxation: objective 0.000000e+00, 400 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 (749 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 -- 11 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 03:44:17 2012 Optimize a model with 4557 rows, 1809 columns and 14045 nonzeros Presolve time: 0.01s Presolved: 4557 rows, 1809 columns, 14045 nonzeros Variable types: 0 continuous, 1809 integer (1809 binary) Root relaxation: objective 0.000000e+00, 395 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 98 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (4977 simplex iterations) in 0.42 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 Sat Dec 15 03:44:17 2012 Optimize a model with 1935 rows, 1248 columns and 5618 nonzeros Presolve removed 187 rows and 187 columns Presolve time: 0.00s Presolved: 1748 rows, 1061 columns, 5244 nonzeros Variable types: 0 continuous, 1061 integer (1061 binary) Root relaxation: objective 0.000000e+00, 194 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 0 187 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (844 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 Sat Dec 15 03:44:17 2012 Optimize a model with 2809 rows, 1435 columns and 8427 nonzeros Presolve time: 0.01s Presolved: 2809 rows, 1435 columns, 8427 nonzeros Variable types: 0 continuous, 1435 integer (1435 binary) Root relaxation: objective 0.000000e+00, 427 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 0 372 - 0.00000 - - 0s 0 0 0.00000 0 372 - 0.00000 - - 0s 0 0 0.00000 0 511 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 1s Cutting planes: Gomory: 14 Zero half: 1114 Explored 0 nodes (7782 simplex iterations) in 1.13 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 Sat Dec 15 03:44:18 2012 Optimize a model with 3683 rows, 1622 columns and 11236 nonzeros Presolve time: 0.01s Presolved: 3683 rows, 1622 columns, 11236 nonzeros Variable types: 0 continuous, 1622 integer (1622 binary) Root relaxation: objective 0.000000e+00, 414 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 0 358 - 0.00000 - - 0s 0 0 0.00000 0 364 - 0.00000 - - 0s 0 0 0.00000 0 358 - 0.00000 - - 0s 0 0 0.00000 0 371 - 0.00000 - - 0s 0 0 0.00000 0 352 - 0.00000 - - 1s 0 0 0.00000 0 348 - 0.00000 - - 1s 0 0 0.00000 0 348 - 0.00000 - - 2s 0 0 0.00000 0 344 - 0.00000 - - 2s 0 0 0.00000 0 336 - 0.00000 - - 3s 0 0 0.00000 0 346 - 0.00000 - - 3s 0 0 0.00000 0 316 - 0.00000 - - 4s 0 0 0.00000 0 316 - 0.00000 - - 4s 0 0 0.00000 0 314 - 0.00000 - - 5s 0 0 0.00000 0 328 - 0.00000 - - 5s 0 0 0.00000 0 326 - 0.00000 - - 5s 0 2 0.00000 0 326 - 0.00000 - - 6s 383 71 0.00000 17 416 - 0.00000 - 137 10s 605 141 0.00000 12 348 - 0.00000 - 141 15s 609 143 0.00000 24 312 - 0.00000 - 140 20s 612 145 0.00000 18 272 - 0.00000 - 140 25s 617 151 0.00000 13 387 - 0.00000 - 229 30s 868 98 infeasible 28 - 0.00000 - 236 35s 1103 47 infeasible 29 - 0.00000 - 243 40s 1336 64 infeasible 25 - 0.00000 - 248 45s 1563 71 infeasible 24 - 0.00000 - 252 50s 1797 81 infeasible 27 - 0.00000 - 254 55s 2038 90 infeasible 29 - 0.00000 - 256 60s 2260 58 infeasible 24 - 0.00000 - 260 65s 2496 44 0.00000 27 314 - 0.00000 - 260 70s 2737 55 infeasible 24 - 0.00000 - 261 75s 2984 54 infeasible 22 - 0.00000 - 262 80s 3203 49 0.00000 24 422 - 0.00000 - 262 85s 3443 33 0.00000 24 429 - 0.00000 - 262 90s 3672 52 0.00000 22 332 - 0.00000 - 262 95s 3932 38 infeasible 22 - 0.00000 - 261 100s 4140 18 infeasible 30 - 0.00000 - 262 105s 4365 7 0.00000 21 394 - 0.00000 - 263 110s Cutting planes: Clique: 1 Zero half: 8 Explored 4521 nodes (1239084 simplex iterations) in 113.24 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