Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0-master/package.mo", uses=false) Using package BuildSysPro with version 3.6.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0-master/package.mo) Using package Modelica with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo) Using package Complex with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Running command: translateModel(BuildSysPro.IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow") translateModel(BuildSysPro.IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001229/0.001229, allocations: 103.1 kB / 16.27 MB, free: 6.414 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001173/0.001173, allocations: 190.3 kB / 17.2 MB, free: 5.953 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.404/1.404, allocations: 222.9 MB / 240.9 MB, free: 15.23 MB / 206.1 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0-master/Building/BuildingEnvelope/HeatTransfer/package.mo:2:1-40:17:writable] Warning: Soil_case_nappe was referenced in the package.order file, but was not found in package.mo, Soil_case_nappe/package.mo or Soil_case_nappe.mo. Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0-master/package.mo): time 0.9343/0.9343, allocations: 143.3 MB / 434.4 MB, free: 11.95 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001963/0.001963, allocations: 67.89 kB / 0.5151 GB, free: 15.05 MB / 446.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3584/0.3604, allocations: 82.03 MB / 0.5952 GB, free: 16.02 MB / 446.1 MB Notification: Performance of NFInst.instantiate(BuildSysPro.IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow): time 0.07738/0.4378, allocations: 61.18 MB / 0.6549 GB, free: 2.742 MB / 494.1 MB Notification: Performance of NFInst.instExpressions: time 0.03506/0.4729, allocations: 12 MB / 0.6667 GB, free: 6.703 MB / 0.4981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.003107/0.4761, allocations: 59.62 kB / 0.6667 GB, free: 6.645 MB / 0.4981 GB Notification: Performance of NFTyping.typeComponents: time 0.003622/0.4798, allocations: 0.6792 MB / 0.6674 GB, free: 5.961 MB / 0.4981 GB Notification: Performance of NFTyping.typeBindings: time 0.01089/0.4907, allocations: 1.967 MB / 0.6693 GB, free: 3.984 MB / 0.4981 GB Notification: Performance of NFTyping.typeClassSections: time 0.006502/0.4972, allocations: 1.204 MB / 0.6705 GB, free: 2.789 MB / 0.4981 GB Notification: Performance of NFFlatten.flatten: time 0.007995/0.5053, allocations: 3.075 MB / 0.6735 GB, free: 15.7 MB / 0.5137 GB Notification: Performance of NFFlatten.resolveConnections: time 0.003099/0.5084, allocations: 1.141 MB / 0.6746 GB, free: 14.52 MB / 0.5137 GB Notification: Performance of NFEvalConstants.evaluate: time 0.005515/0.514, allocations: 1.314 MB / 0.6759 GB, free: 13.21 MB / 0.5137 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002778/0.5168, allocations: 0.9101 MB / 0.6768 GB, free: 12.29 MB / 0.5137 GB Notification: Performance of NFPackage.collectConstants: time 0.000451/0.5173, allocations: 124 kB / 0.6769 GB, free: 12.17 MB / 0.5137 GB Notification: Performance of NFFlatten.collectFunctions: time 0.005574/0.5228, allocations: 1.439 MB / 0.6783 GB, free: 10.73 MB / 0.5137 GB Notification: Performance of NFScalarize.scalarize: time 0.0008389/0.5237, allocations: 298.8 kB / 0.6786 GB, free: 10.44 MB / 0.5137 GB Notification: Performance of NFVerifyModel.verify: time 0.001721/0.5255, allocations: 0.6958 MB / 0.6792 GB, free: 9.738 MB / 0.5137 GB Notification: Performance of NFConvertDAE.convert: time 0.007061/0.5326, allocations: 2.407 MB / 0.6816 GB, free: 7.324 MB / 0.5137 GB Notification: Performance of FrontEnd - DAE generated: time 7.093e-06/0.5326, allocations: 4 kB / 0.6816 GB, free: 7.32 MB / 0.5137 GB Notification: Performance of FrontEnd: time 1.953e-06/0.5326, allocations: 0 / 0.6816 GB, free: 7.32 MB / 0.5137 GB Notification: Performance of Transformations before backend: time 5.076e-05/0.5327, allocations: 0 / 0.6816 GB, free: 7.32 MB / 0.5137 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 194 * Number of variables: 194 Notification: Performance of Generate backend data structure: time 0.006058/0.5388, allocations: 1.73 MB / 0.6833 GB, free: 5.531 MB / 0.5137 GB Notification: Performance of prepare preOptimizeDAE: time 6.155e-05/0.5389, allocations: 8.031 kB / 0.6833 GB, free: 5.523 MB / 0.5137 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.00478/0.5437, allocations: 462.7 kB / 0.6837 GB, free: 5.07 MB / 0.5137 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.004125/0.5478, allocations: 1.113 MB / 0.6848 GB, free: 3.898 MB / 0.5137 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0007108/0.5486, allocations: 121.9 kB / 0.6849 GB, free: 3.781 MB / 0.5137 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002538/0.5488, allocations: 80 kB / 0.685 GB, free: 3.703 MB / 0.5137 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.00429/0.5531, allocations: 1.006 MB / 0.686 GB, free: 2.664 MB / 0.5137 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.912e-05/0.5532, allocations: 0 / 0.686 GB, free: 2.664 MB / 0.5137 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001406/0.5534, allocations: 32 kB / 0.686 GB, free: 2.633 MB / 0.5137 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.785e-05/0.5534, allocations: 24 kB / 0.6861 GB, free: 2.609 MB / 0.5137 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.005012/0.5584, allocations: 0.9485 MB / 0.687 GB, free: 1.664 MB / 0.5137 GB Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts. Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.01225/0.5707, allocations: 4.746 MB / 0.6916 GB, free: 12.57 MB / 0.5294 GB Notification: Performance of preOpt comSubExp (simulation): time 0.007733/0.5785, allocations: 0.997 MB / 0.6926 GB, free: 11.56 MB / 0.5294 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.002139/0.5807, allocations: 415.8 kB / 0.693 GB, free: 11.16 MB / 0.5294 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001622/0.5823, allocations: 1.013 MB / 0.694 GB, free: 9.922 MB / 0.5294 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.832e-05/0.5824, allocations: 47 kB / 0.694 GB, free: 9.863 MB / 0.5294 GB Notification: Performance of pre-optimization done (n=53): time 4.399e-06/0.5824, allocations: 0 / 0.694 GB, free: 9.863 MB / 0.5294 GB Notification: Performance of matching and sorting (n=53): time 0.01886/0.6013, allocations: 2.232 MB / 0.6962 GB, free: 7.602 MB / 0.5294 GB Notification: Performance of inlineWhenForInitialization (initialization): time 7.766e-05/0.6014, allocations: 55.84 kB / 0.6963 GB, free: 7.535 MB / 0.5294 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002456/0.6038, allocations: 0.9508 MB / 0.6972 GB, free: 6.566 MB / 0.5294 GB Notification: Performance of collectPreVariables (initialization): time 0.0001651/0.604, allocations: 37.7 kB / 0.6972 GB, free: 6.523 MB / 0.5294 GB Notification: Performance of collectInitialEqns (initialization): time 0.0007552/0.6048, allocations: 0.5002 MB / 0.6977 GB, free: 6.02 MB / 0.5294 GB Notification: Performance of collectInitialBindings (initialization): time 0.0003289/0.6051, allocations: 189.3 kB / 0.6979 GB, free: 5.832 MB / 0.5294 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003962/0.6056, allocations: 130.1 kB / 0.698 GB, free: 5.699 MB / 0.5294 GB Notification: Performance of setup shared object (initialization): time 0.0002401/0.6058, allocations: 326 kB / 0.6983 GB, free: 5.375 MB / 0.5294 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.002154/0.608, allocations: 362.8 kB / 0.6987 GB, free: 5.02 MB / 0.5294 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.00246/0.6105, allocations: 0.5117 MB / 0.6992 GB, free: 4.441 MB / 0.5294 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.004294/0.6148, allocations: 0.7657 MB / 0.6999 GB, free: 3.645 MB / 0.5294 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 6.653e-06/0.6148, allocations: 0 / 0.6999 GB, free: 3.645 MB / 0.5294 GB Notification: Performance of matching and sorting (n=69) (initialization): time 0.005999/0.6208, allocations: 1.072 MB / 0.701 GB, free: 2.559 MB / 0.5294 GB Notification: Performance of prepare postOptimizeDAE: time 3.216e-05/0.6209, allocations: 8 kB / 0.701 GB, free: 2.551 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.132e-05/0.6209, allocations: 0 / 0.701 GB, free: 2.551 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.002421/0.6233, allocations: 320.9 kB / 0.7013 GB, free: 2.234 MB / 0.5294 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001264/0.6246, allocations: 123.8 kB / 0.7014 GB, free: 2.113 MB / 0.5294 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002921/0.6275, allocations: 0.9175 MB / 0.7023 GB, free: 1.172 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001958/0.6295, allocations: 127.4 kB / 0.7024 GB, free: 1.047 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001462/0.6297, allocations: 39.91 kB / 0.7025 GB, free: 1.008 MB / 0.5294 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.002775/0.6325, allocations: 0.5543 MB / 0.703 GB, free: 464 kB / 0.5294 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.002474/0.635, allocations: 0.5234 MB / 0.7035 GB, free: 15.86 MB / 0.545 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.002413/0.6374, allocations: 0.7502 MB / 0.7042 GB, free: 15.08 MB / 0.545 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 3.988e-06/0.6374, allocations: 0 / 0.7042 GB, free: 15.08 MB / 0.545 GB Notification: Performance of matching and sorting (n=69) (initialization_lambda0): time 0.003313/0.6407, allocations: 1.064 MB / 0.7053 GB, free: 14.01 MB / 0.545 GB Notification: Performance of prepare postOptimizeDAE: time 1.265e-05/0.6408, allocations: 4 kB / 0.7053 GB, free: 14 MB / 0.545 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.392e-06/0.6408, allocations: 4 kB / 0.7053 GB, free: 14 MB / 0.545 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001192/0.642, allocations: 300.9 kB / 0.7056 GB, free: 13.7 MB / 0.545 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006689/0.6427, allocations: 131.7 kB / 0.7057 GB, free: 13.57 MB / 0.545 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001612/0.6443, allocations: 0.9113 MB / 0.7066 GB, free: 12.64 MB / 0.545 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00109/0.6454, allocations: 119.6 kB / 0.7067 GB, free: 12.52 MB / 0.545 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.505e-05/0.6455, allocations: 23.98 kB / 0.7067 GB, free: 12.5 MB / 0.545 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 11 * Number of states: 0 () * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (55): * Single equations (assignments): 54 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,14)} Notification: Performance of prepare postOptimizeDAE: time 0.0002662/0.6457, allocations: 228.6 kB / 0.7069 GB, free: 12.27 MB / 0.545 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002153/0.646, allocations: 110.6 kB / 0.707 GB, free: 12.16 MB / 0.545 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.004909/0.6509, allocations: 1.326 MB / 0.7083 GB, free: 10.82 MB / 0.545 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.347e-05/0.6509, allocations: 4 kB / 0.7083 GB, free: 10.82 MB / 0.545 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.57e-06/0.6509, allocations: 0 / 0.7083 GB, free: 10.82 MB / 0.545 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.766e-06/0.6509, allocations: 3.984 kB / 0.7084 GB, free: 10.82 MB / 0.545 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.006326/0.6573, allocations: 2.42 MB / 0.7107 GB, free: 8.316 MB / 0.545 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.893e-06/0.6573, allocations: 0 / 0.7107 GB, free: 8.316 MB / 0.545 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005696/0.6579, allocations: 103.8 kB / 0.7108 GB, free: 8.215 MB / 0.545 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.001079/0.659, allocations: 300.5 kB / 0.7111 GB, free: 7.918 MB / 0.545 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 5.314e-05/0.659, allocations: 19.98 kB / 0.7111 GB, free: 7.898 MB / 0.545 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001675/0.6607, allocations: 0.9408 MB / 0.712 GB, free: 6.934 MB / 0.545 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 5.13e-06/0.6607, allocations: 4.031 kB / 0.712 GB, free: 6.93 MB / 0.545 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.004705/0.6654, allocations: 1.347 MB / 0.7134 GB, free: 5.547 MB / 0.545 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005588/0.666, allocations: 275.5 kB / 0.7136 GB, free: 5.258 MB / 0.545 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000219/0.6662, allocations: 15.94 kB / 0.7136 GB, free: 5.242 MB / 0.545 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0009327/0.6672, allocations: 75.91 kB / 0.7137 GB, free: 5.168 MB / 0.545 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001173/0.6673, allocations: 44.38 kB / 0.7137 GB, free: 5.121 MB / 0.545 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.95e-05/0.6674, allocations: 23.98 kB / 0.7138 GB, free: 5.098 MB / 0.545 GB Notification: Performance of sorting global known variables: time 0.001127/0.6685, allocations: 0.6635 MB / 0.7144 GB, free: 4.426 MB / 0.545 GB Notification: Performance of sort global known variables: time 3.567e-06/0.6685, allocations: 0 / 0.7144 GB, free: 4.426 MB / 0.545 GB Notification: Performance of remove unused functions: time 0.001677/0.6702, allocations: 0.5768 MB / 0.715 GB, free: 3.848 MB / 0.545 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 7 * Number of states: 0 () * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (42): * Single equations (assignments): 38 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 3 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,16)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0009234/0.6711, allocations: 400.3 kB / 0.7154 GB, free: 3.457 MB / 0.545 GB Notification: Performance of simCode: created initialization part: time 0.004357/0.6755, allocations: 1.346 MB / 0.7167 GB, free: 2.113 MB / 0.545 GB Notification: Performance of simCode: created event and clocks part: time 3.818e-06/0.6755, allocations: 4 kB / 0.7167 GB, free: 2.109 MB / 0.545 GB Notification: Performance of simCode: created simulation system equations: time 0.001378/0.6769, allocations: 460.8 kB / 0.7171 GB, free: 1.66 MB / 0.545 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002319/0.6792, allocations: 0.4894 MB / 0.7176 GB, free: 1.18 MB / 0.545 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.004356/0.6836, allocations: 1.952 MB / 0.7195 GB, free: 15.18 MB / 0.5606 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.000812/0.6844, allocations: 1.066 MB / 0.7205 GB, free: 14.08 MB / 0.5606 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000312/0.6848, allocations: 87.41 kB / 0.7206 GB, free: 14 MB / 0.5606 GB Notification: Performance of SimCode: time 8.62e-07/0.6848, allocations: 0 / 0.7206 GB, free: 14 MB / 0.5606 GB Notification: Performance of Templates: time 0.0364/0.7212, allocations: 24.27 MB / 0.7443 GB, free: 5.922 MB / 0.5762 GB make -j1 -f BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow.makefile (rm -f BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow.pipe ; mkfifo BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow.pipe ; head -c 1048576 < BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow.pipe >> ../files/BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow.sim & ./BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildSysPro_BuildSysPro.IBPSA.Fluid.HeatPumps.Validation.Carnot_TCon_reverseFlow.pipe 2>&1)