private void ObjectInvariant()
{
Contract.Invariant(m_AST_DRQ != null);
Contract.Invariant(m_ASTMap_DRQ != null);
Contract.Invariant(m_ASTVector_DRQ != null);
Contract.Invariant(m_ApplyResult_DRQ != null);
Contract.Invariant(m_FuncEntry_DRQ != null);
Contract.Invariant(m_FuncInterp_DRQ != null);
Contract.Invariant(m_Goal_DRQ != null);
Contract.Invariant(m_Model_DRQ != null);
Contract.Invariant(m_Params_DRQ != null);
Contract.Invariant(m_ParamDescrs_DRQ != null);
Contract.Invariant(m_Probe_DRQ != null);
Contract.Invariant(m_Solver_DRQ != null);
Contract.Invariant(m_Statistics_DRQ != null);
Contract.Invariant(m_Tactic_DRQ != null);
Contract.Invariant(m_Fixedpoint_DRQ != null);
}