Iteration final - SOLVER_EXECUTION
Sequence: 8
Timestamp: 2025-07-25 22:28:57

Prompt:
Generated solver codes with templates and executed them with retry logic

Response:
{
  "gurobipy": {
    "solver_type": "gurobipy",
    "execution_time": 0.18851089477539062,
    "return_code": 0,
    "stdout": "Restricted license - for non-production use only - expires 2026-11-23\nGurobi Optimizer version 12.0.2 build v12.0.2rc0 (linux64 - \"Red Hat Enterprise Linux 9.4 (Plow)\")\n\nCPU model: AMD EPYC 7513 32-Core Processor, instruction set [SSE2|AVX|AVX2]\nThread count: 64 physical cores, 128 logical processors, using up to 32 threads\n\nOptimize a model with 11 rows, 16 columns and 48 nonzeros\nModel fingerprint: 0x462fddc7\nVariable types: 1 continuous, 15 integer (15 binary)\nCoefficient statistics:\n  Matrix range     [1e+00, 1e+00]\n  Objective range  [1e+00, 1e+00]\n  Bounds range     [1e+00, 1e+00]\n  RHS range        [1e+00, 4e+01]\nFound heuristic solution: objective 4.0000000\nPresolve removed 3 rows and 0 columns\nPresolve time: 0.00s\nPresolved: 8 rows, 16 columns, 33 nonzeros\nVariable types: 0 continuous, 16 integer (15 binary)\n\nRoot relaxation: objective 1.666667e+00, 14 iterations, 0.00 seconds (0.00 work units)\n\n    Nodes    |    Current Node    |     Objective Bounds      |     Work\n Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time\n\n     0     0    1.66667    0    5    4.00000    1.66667  58.3%     -    0s\nH    0     0                       2.0000000    1.66667  16.7%     -    0s\n     0     0    1.66667    0    5    2.00000    1.66667  16.7%     -    0s\n\nExplored 1 nodes (14 simplex iterations) in 0.00 seconds (0.00 work units)\nThread count was 32 (of 128 available processors)\n\nSolution count 2: 2 4 \n\nOptimal solution found (tolerance 1.00e-04)\nBest objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0000%\nOptimal value: 2.0\nStudent 101 is assigned to Classroom 3\nStudent 102 is assigned to Classroom 1\nStudent 103 is assigned to Classroom 2\nStudent 104 is assigned to Classroom 1\nStudent 105 is assigned to Classroom 3\n",
    "stderr": "",
    "status": "optimal",
    "optimal_value": 2.0,
    "error_message": null,
    "decision_variables": {}
  },
  "docplex": {
    "solver_type": "docplex",
    "execution_time": 1.141324520111084,
    "return_code": 0,
    "stdout": "Optimal value: 2.0\nStudent 101 is assigned to Classroom 3\nStudent 102 is assigned to Classroom 3\nStudent 103 is assigned to Classroom 2\nStudent 104 is assigned to Classroom 1\nStudent 105 is assigned to Classroom 1\n",
    "stderr": "",
    "status": "optimal",
    "optimal_value": 2.0,
    "error_message": null,
    "decision_variables": {}
  },
  "pyomo": {
    "solver_type": "pyomo",
    "execution_time": 0.9307270050048828,
    "return_code": 0,
    "stdout": "Read LP format model from file /tmp/tmpd_v0gs05.pyomo.lp\nReading time = 0.00 seconds\nx1: 11 rows, 16 columns, 48 nonzeros\nSet parameter TimeLimit to value 300\nSet parameter MIPGap to value 0.01\nGurobi Optimizer version 12.0.2 build v12.0.2rc0 (linux64 - \"Red Hat Enterprise Linux 9.4 (Plow)\")\n\nCPU model: AMD EPYC 7513 32-Core Processor, instruction set [SSE2|AVX|AVX2]\nThread count: 64 physical cores, 128 logical processors, using up to 32 threads\n\nNon-default parameters:\nTimeLimit  300\nMIPGap  0.01\n\nOptimize a model with 11 rows, 16 columns and 48 nonzeros\nModel fingerprint: 0x35a289b6\nVariable types: 1 continuous, 15 integer (15 binary)\nCoefficient statistics:\n  Matrix range     [1e+00, 1e+00]\n  Objective range  [1e+00, 1e+00]\n  Bounds range     [1e+00, 1e+00]\n  RHS range        [1e+00, 4e+01]\nFound heuristic solution: objective 4.0000000\nPresolve removed 3 rows and 0 columns\nPresolve time: 0.00s\nPresolved: 8 rows, 16 columns, 33 nonzeros\nVariable types: 0 continuous, 16 integer (15 binary)\n\nRoot relaxation: objective 1.666667e+00, 13 iterations, 0.00 seconds (0.00 work units)\n\n    Nodes    |    Current Node    |     Objective Bounds      |     Work\n Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time\n\n     0     0    1.66667    0    5    4.00000    1.66667  58.3%     -    0s\nH    0     0                       2.0000000    1.66667  16.7%     -    0s\n     0     0    1.66667    0    5    2.00000    1.66667  16.7%     -    0s\n\nExplored 1 nodes (13 simplex iterations) in 0.01 seconds (0.00 work units)\nThread count was 32 (of 128 available processors)\n\nSolution count 2: 2 4 \n\nOptimal solution found (tolerance 1.00e-02)\nBest objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0000%\nOptimal solution found!\nOptimal value: 2.0\n\nVariable values:\nStudent 101 is assigned to Classroom 1\nStudent 102 is assigned to Classroom 2\nStudent 103 is assigned to Classroom 3\nStudent 104 is assigned to Classroom 1\nStudent 105 is assigned to Classroom 2\n",
    "stderr": "",
    "status": "optimal",
    "optimal_value": 2.0,
    "error_message": null,
    "decision_variables": {}
  }
}
