Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.7.0.x_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL.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 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo", uses=false) Using package Buildings with version 7.0.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+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(Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL") translateModel(Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001238/0.001238, allocations: 111.3 kB / 15.23 MB, free: 0.6406 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001529/0.001529, allocations: 192.6 kB / 16.14 MB, free: 6.703 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.402/1.402, allocations: 205.1 MB / 222 MB, free: 4.762 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo): time 1.563/1.563, allocations: 251.7 MB / 0.5088 GB, free: 3.328 MB / 414.1 MB Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.001247/0.001247, allocations: 55.92 kB / 0.6216 GB, free: 1.949 MB / 0.5137 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.439/0.4403, allocations: 104.7 MB / 0.7238 GB, free: 13.21 MB / 0.545 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL): time 0.06737/0.5077, allocations: 74.78 MB / 0.7968 GB, free: 2.172 MB / 0.6075 GB Notification: Performance of NFInst.instExpressions: time 0.01971/0.5274, allocations: 15.06 MB / 0.8115 GB, free: 3.07 MB / 0.6231 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.00251/0.53, allocations: 63.56 kB / 0.8116 GB, free: 3.008 MB / 0.6231 GB Notification: Performance of NFTyping.typeComponents: time 0.002119/0.5321, allocations: 0.6721 MB / 0.8123 GB, free: 2.332 MB / 0.6231 GB Notification: Performance of NFTyping.typeBindings: time 0.006433/0.5386, allocations: 2.359 MB / 0.8146 GB, free: 15.96 MB / 0.6387 GB Notification: Performance of NFTyping.typeClassSections: time 0.003618/0.5422, allocations: 1.244 MB / 0.8158 GB, free: 14.73 MB / 0.6387 GB Notification: Performance of NFFlatten.flatten: time 0.007969/0.5502, allocations: 5.517 MB / 0.8212 GB, free: 9.203 MB / 0.6387 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002447/0.5527, allocations: 1.183 MB / 0.8223 GB, free: 7.988 MB / 0.6387 GB Notification: Performance of NFEvalConstants.evaluate: time 0.003417/0.5561, allocations: 1.369 MB / 0.8237 GB, free: 6.613 MB / 0.6387 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002166/0.5583, allocations: 1.194 MB / 0.8248 GB, free: 5.414 MB / 0.6387 GB Notification: Performance of NFPackage.collectConstants: time 0.0002932/0.5586, allocations: 79.94 kB / 0.8249 GB, free: 5.336 MB / 0.6387 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003638/0.5623, allocations: 1.271 MB / 0.8261 GB, free: 4.062 MB / 0.6387 GB Notification: Performance of NFScalarize.scalarize: time 0.0004311/0.5627, allocations: 310.6 kB / 0.8264 GB, free: 3.758 MB / 0.6387 GB Notification: Performance of NFVerifyModel.verify: time 0.001096/0.5639, allocations: 0.82 MB / 0.8272 GB, free: 2.934 MB / 0.6387 GB Notification: Performance of NFConvertDAE.convert: time 0.003764/0.5676, allocations: 2.785 MB / 0.83 GB, free: 144 kB / 0.6387 GB Notification: Performance of FrontEnd - DAE generated: time 5.079e-06/0.5676, allocations: 0 / 0.83 GB, free: 144 kB / 0.6387 GB Notification: Performance of FrontEnd: time 1.102e-06/0.5677, allocations: 0 / 0.83 GB, free: 144 kB / 0.6387 GB Notification: Performance of Transformations before backend: time 2.428e-05/0.5677, allocations: 0 / 0.83 GB, free: 144 kB / 0.6387 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 240 * Number of variables: 240 Notification: Performance of Generate backend data structure: time 0.003787/0.5715, allocations: 2.087 MB / 0.832 GB, free: 13.98 MB / 0.6544 GB Notification: Performance of prepare preOptimizeDAE: time 3.938e-05/0.5715, allocations: 12.03 kB / 0.832 GB, free: 13.97 MB / 0.6544 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0008234/0.5724, allocations: 230.8 kB / 0.8322 GB, free: 13.75 MB / 0.6544 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002359/0.5747, allocations: 1.478 MB / 0.8337 GB, free: 12.21 MB / 0.6544 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.7e-05/0.5748, allocations: 77.98 kB / 0.8337 GB, free: 12.14 MB / 0.6544 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001503/0.575, allocations: 104 kB / 0.8338 GB, free: 12.04 MB / 0.6544 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001962/0.5769, allocations: 1.089 MB / 0.8349 GB, free: 10.91 MB / 0.6544 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.528e-05/0.577, allocations: 4 kB / 0.8349 GB, free: 10.91 MB / 0.6544 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 8.803e-05/0.5771, allocations: 40 kB / 0.8349 GB, free: 10.87 MB / 0.6544 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.556e-05/0.5771, allocations: 24 kB / 0.835 GB, free: 10.85 MB / 0.6544 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001875/0.579, allocations: 0.9016 MB / 0.8358 GB, free: 9.941 MB / 0.6544 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 0.005948/0.585, allocations: 4.907 MB / 0.8406 GB, free: 4.742 MB / 0.6544 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001414/0.5864, allocations: 0.6236 MB / 0.8412 GB, free: 4.113 MB / 0.6544 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.000705/0.5871, allocations: 347 kB / 0.8416 GB, free: 3.773 MB / 0.6544 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0006467/0.5878, allocations: 0.8316 MB / 0.8424 GB, free: 2.758 MB / 0.6544 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.984e-05/0.5878, allocations: 39.12 kB / 0.8424 GB, free: 2.707 MB / 0.6544 GB Notification: Performance of pre-optimization done (n=62): time 2.675e-06/0.5878, allocations: 0 / 0.8424 GB, free: 2.707 MB / 0.6544 GB Notification: Performance of matching and sorting (n=62): time 0.004868/0.5927, allocations: 1.405 MB / 0.8438 GB, free: 1.277 MB / 0.6544 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.653e-05/0.5928, allocations: 59.97 kB / 0.8439 GB, free: 1.207 MB / 0.6544 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001617/0.5944, allocations: 1.214 MB / 0.845 GB, free: 15.98 MB / 0.67 GB Notification: Performance of collectPreVariables (initialization): time 9.074e-05/0.5945, allocations: 41.64 kB / 0.8451 GB, free: 15.93 MB / 0.67 GB Notification: Performance of collectInitialEqns (initialization): time 0.0004536/0.595, allocations: 0.6027 MB / 0.8457 GB, free: 15.32 MB / 0.67 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001862/0.5951, allocations: 212.8 kB / 0.8459 GB, free: 15.11 MB / 0.67 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002394/0.5954, allocations: 154.6 kB / 0.846 GB, free: 14.95 MB / 0.67 GB Notification: Performance of setup shared object (initialization): time 0.0001306/0.5955, allocations: 341.9 kB / 0.8463 GB, free: 14.61 MB / 0.67 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006802/0.5962, allocations: 292.5 kB / 0.8466 GB, free: 14.32 MB / 0.67 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.000846/0.5971, allocations: 0.492 MB / 0.8471 GB, free: 13.75 MB / 0.67 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001331/0.5984, allocations: 0.7159 MB / 0.8478 GB, free: 13 MB / 0.67 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 6.452e-06/0.5984, allocations: 4 kB / 0.8478 GB, free: 12.99 MB / 0.67 GB Notification: Performance of matching and sorting (n=88) (initialization): time 0.004625/0.6031, allocations: 1.257 MB / 0.849 GB, free: 11.72 MB / 0.67 GB Notification: Performance of prepare postOptimizeDAE: time 2.059e-05/0.6031, allocations: 11.94 kB / 0.849 GB, free: 11.71 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.257e-05/0.6031, allocations: 4 kB / 0.8491 GB, free: 11.71 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0006736/0.6038, allocations: 161 kB / 0.8492 GB, free: 11.55 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006441/0.6045, allocations: 155.8 kB / 0.8494 GB, free: 11.39 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0008541/0.6053, allocations: 0.7162 MB / 0.8501 GB, free: 10.65 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001258/0.6066, allocations: 167 kB / 0.8502 GB, free: 10.49 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.381e-05/0.6067, allocations: 24 kB / 0.8502 GB, free: 10.46 MB / 0.67 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001121/0.6078, allocations: 0.5565 MB / 0.8508 GB, free: 9.906 MB / 0.67 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0009902/0.6088, allocations: 491.9 kB / 0.8512 GB, free: 9.352 MB / 0.67 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001346/0.6102, allocations: 0.7041 MB / 0.8519 GB, free: 8.598 MB / 0.67 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.565e-06/0.6102, allocations: 4 kB / 0.8519 GB, free: 8.594 MB / 0.67 GB Notification: Performance of matching and sorting (n=88) (initialization_lambda0): time 0.004856/0.6151, allocations: 1.261 MB / 0.8532 GB, free: 7.32 MB / 0.67 GB Notification: Performance of prepare postOptimizeDAE: time 1.532e-05/0.6151, allocations: 4 kB / 0.8532 GB, free: 7.316 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.32e-06/0.6151, allocations: 4 kB / 0.8532 GB, free: 7.312 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005897/0.6157, allocations: 161.1 kB / 0.8533 GB, free: 7.152 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005907/0.6163, allocations: 159.8 kB / 0.8535 GB, free: 6.996 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0009085/0.6172, allocations: 0.72 MB / 0.8542 GB, free: 6.25 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001308/0.6185, allocations: 143.5 kB / 0.8543 GB, free: 6.109 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.218e-05/0.6186, allocations: 27.98 kB / 0.8544 GB, free: 6.082 MB / 0.67 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 15 * 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 (77): * Single equations (assignments): 76 * 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 {(1,11)} Notification: Performance of prepare postOptimizeDAE: time 0.0002843/0.6189, allocations: 224.1 kB / 0.8546 GB, free: 5.855 MB / 0.67 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002853/0.6192, allocations: 130.4 kB / 0.8547 GB, free: 5.727 MB / 0.67 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.004789/0.624, allocations: 1.26 MB / 0.8559 GB, free: 4.449 MB / 0.67 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.937e-05/0.624, allocations: 8 kB / 0.8559 GB, free: 4.441 MB / 0.67 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 8.526e-06/0.6241, allocations: 0 / 0.8559 GB, free: 4.441 MB / 0.67 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.004168/0.6282, allocations: 1.092 MB / 0.857 GB, free: 3.316 MB / 0.67 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.004974/0.6332, allocations: 2.302 MB / 0.8592 GB, free: 0.9023 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 9.538e-06/0.6333, allocations: 4 kB / 0.8592 GB, free: 0.8984 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004802/0.6337, allocations: 119.7 kB / 0.8594 GB, free: 0.7812 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0005792/0.6343, allocations: 145.2 kB / 0.8595 GB, free: 0.6367 MB / 0.67 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.969e-05/0.6344, allocations: 23.98 kB / 0.8595 GB, free: 0.6133 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0009051/0.6353, allocations: 0.7161 MB / 0.8602 GB, free: 15.87 MB / 0.6856 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.328e-06/0.6353, allocations: 4 kB / 0.8602 GB, free: 15.87 MB / 0.6856 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003192/0.6385, allocations: 1.395 MB / 0.8616 GB, free: 14.4 MB / 0.6856 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0007677/0.6393, allocations: 303.2 kB / 0.8619 GB, free: 14.08 MB / 0.6856 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000215/0.6395, allocations: 16 kB / 0.8619 GB, free: 14.07 MB / 0.6856 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0009202/0.6405, allocations: 87.86 kB / 0.862 GB, free: 13.98 MB / 0.6856 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001227/0.6406, allocations: 56.3 kB / 0.862 GB, free: 13.93 MB / 0.6856 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.787e-05/0.6407, allocations: 31.98 kB / 0.8621 GB, free: 13.89 MB / 0.6856 GB Notification: Performance of sorting global known variables: time 0.001525/0.6422, allocations: 0.866 MB / 0.8629 GB, free: 13.03 MB / 0.6856 GB Notification: Performance of sort global known variables: time 1.7e-07/0.6422, allocations: 0 / 0.8629 GB, free: 13.03 MB / 0.6856 GB Notification: Performance of remove unused functions: time 0.002137/0.6444, allocations: 0.6979 MB / 0.8636 GB, free: 12.33 MB / 0.6856 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 15 * Number of states: 2 (heaPum.con.vol.dynBal.U,heaPum.eva.vol.dynBal.U) * 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 (55): * Single equations (assignments): 50 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 4 * 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 {(1,11)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0009063/0.6453, allocations: 459.6 kB / 0.864 GB, free: 11.88 MB / 0.6856 GB Notification: Performance of simCode: created initialization part: time 0.002787/0.6481, allocations: 1.109 MB / 0.8651 GB, free: 10.77 MB / 0.6856 GB Notification: Performance of simCode: created event and clocks part: time 4.479e-06/0.6481, allocations: 0 / 0.8651 GB, free: 10.77 MB / 0.6856 GB Notification: Performance of simCode: created simulation system equations: time 0.0009808/0.6491, allocations: 403.5 kB / 0.8655 GB, free: 10.38 MB / 0.6856 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003679/0.6528, allocations: 0.7729 MB / 0.8662 GB, free: 9.621 MB / 0.6856 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.004396/0.6572, allocations: 2.763 MB / 0.8689 GB, free: 6.785 MB / 0.6856 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007131/0.6579, allocations: 1.164 MB / 0.8701 GB, free: 5.594 MB / 0.6856 GB Notification: Performance of simCode: alias equations: time 0.001203/0.6591, allocations: 307.1 kB / 0.8704 GB, free: 5.289 MB / 0.6856 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002428/0.6594, allocations: 107.4 kB / 0.8705 GB, free: 5.184 MB / 0.6856 GB Notification: Performance of SimCode: time 5.61e-07/0.6594, allocations: 0 / 0.8705 GB, free: 5.184 MB / 0.6856 GB Notification: Performance of Templates: time 0.04868/0.7081, allocations: 30.48 MB / 0.9002 GB, free: 7.094 MB / 0.7169 GB make -j1 -f Buildings_maint.7.0.x_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL.makefile (rm -f Buildings_maint.7.0.x_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL.pipe ; mkfifo Buildings_maint.7.0.x_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL.pipe ; head -c 1048576 < Buildings_maint.7.0.x_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL.pipe >> ../files/Buildings_maint.7.0.x_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL.sim & ./Buildings_maint.7.0.x_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_maint.7.0.x_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL.pipe 2>&1)