text: import numpy as np
  import os
  import subprocess as sp
  
  from dnnv.verifiers.common.base import Parameter, Verifier
  from dnnv.verifiers.common.results import SAT, UNSAT, UNKNOWN
  from dnnv.verifiers.common.utils import as_layers
  
  from .errors import MIPVerifyError, MIPVerifyTranslatorError
  from .layers import MIPVERIFY_LAYER_TYPES
  from .utils import to_mipverify_inputs
  
  
  class MIPVerify(Verifier):
      translator_error = MIPVerifyTranslatorError
      verifier_error = MIPVerifyError
  
      @classmethod
      def is_installed(cls):
          verifier = "julia"
          for path in os.environ["PATH"].split(os.pathsep):
              exe = os.path.join(path, verifier)
              if os.path.isfile(exe) and os.access(exe, os.X_OK):
                  proc = sp.run(
                      ["julia", "-e", "using MIPVerify"],
                      stdout=sp.DEVNULL,
                      stderr=sp.DEVNULL,
                  )
                  return proc.returncode == 0
          return False
  
      def build_inputs(self, prop):
          if prop.input_constraint.num_variables > 1:
              raise MIPVerifyTranslatorError(
                  "Unsupported network: More than 1 input variable"
              )
          if all((lb >= 0).all() for lb in prop.input_constraint.lower_bounds) and all(
              (ub <= 1).all() for ub in prop.input_constraint.upper_bounds
          ):
              lbs = prop.input_constraint.lower_bounds
              ubs = prop.input_constraint.upper_bounds
              op_graph = prop.suffixed_op_graph()
          else:
              op_graph, (lbs, ubs) = prop.prefixed_and_suffixed_op_graph()
          layers = as_layers(
              op_graph,
              extra_layer_types=MIPVERIFY_LAYER_TYPES,
              translator_error=MIPVerifyTranslatorError,
          )
          input_shape = prop.op_graph.input_shape[0]
          lb = lbs[0]
          ub = ubs[0]
          mipverify_inputs = to_mipverify_inputs(
              lb, ub, layers, translator_error=MIPVerifyTranslatorError,
          )
          return "julia", mipverify_inputs["property_path"]
  
      def parse_results(self, prop, results):
          stdout, stderr = results
          result = stdout[-1].lower()
          if "infeasible" in result:
              return UNSAT, None
          elif "optimal" in result:
              return SAT, None
          elif "trivial" in result:
              return SAT, None
          raise MIPVerifyTranslatorError(f"Unexpected verification result: {stdout[-1]}")
  