Running: ./testmodel.py --libraries=/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_latest_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_Static.conf.json loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 9.0.0-master/package.mo", uses=false) loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo", uses=false) loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) Using package ModelicaServices with version 4.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Using package Modelica with version 4.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo) Using package Complex with version 4.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Using package Buildings with version 9.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 9.0.0-master/package.mo) Running command: translateModel(Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_Static,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_latest_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_Static") translateModel(Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_Static,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_latest_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_Static") Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 9.0.0-master/package.mo): time 1.626/1.626, allocations: 306.1 MB / 321.4 MB, free: 10.75 MB / 250.7 MB Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.0009571/0.0009571, allocations: 187.5 kB / 393.1 MB, free: 4.078 MB / 314.7 MB Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.307/1.307, allocations: 225.7 MB / 0.6743 GB, free: 12.63 MB / 0.4948 GB Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0008044/0.0008044, allocations: 97.3 kB / 0.7935 GB, free: 40.05 MB / 0.5417 GB Notification: Performance of FrontEnd - loaded program: time 0.0003386/0.0003387, allocations: 8 kB / 0.9224 GB, free: 8.688 MB / 0.6355 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.5429/0.5432, allocations: 121.3 MB / 1.041 GB, free: 58.35 MB / 0.698 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_Static): time 0.05192/0.5952, allocations: 69.3 MB / 1.109 GB, free: 6.93 MB / 0.698 GB Notification: Performance of NFInst.instExpressions: time 0.02121/0.6165, allocations: 20.69 MB / 1.129 GB, free: 4.863 MB / 0.7136 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002749/0.6193, allocations: 58.66 kB / 1.129 GB, free: 4.84 MB / 0.7136 GB Notification: Performance of NFTyping.typeComponents: time 0.003135/0.6224, allocations: 0.7493 MB / 1.13 GB, free: 4.41 MB / 0.7136 GB Notification: Performance of NFTyping.typeBindings: time 0.007818/0.6303, allocations: 2.346 MB / 1.132 GB, free: 3.008 MB / 0.7136 GB Notification: Performance of NFTyping.typeClassSections: time 0.005478/0.6358, allocations: 1.793 MB / 1.134 GB, free: 1.957 MB / 0.7136 GB Notification: Performance of NFFlatten.flatten: time 0.007991/0.6438, allocations: 5.836 MB / 1.139 GB, free: 15.7 MB / 0.7292 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002593/0.6464, allocations: 1.273 MB / 1.141 GB, free: 15.19 MB / 0.7292 GB Notification: Performance of NFEvalConstants.evaluate: time 0.003779/0.6502, allocations: 1.464 MB / 1.142 GB, free: 14.56 MB / 0.7292 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002615/0.6528, allocations: 1.185 MB / 1.143 GB, free: 14.05 MB / 0.7292 GB Notification: Performance of NFPackage.collectConstants: time 0.0005333/0.6534, allocations: 66.88 kB / 1.143 GB, free: 14.05 MB / 0.7292 GB Notification: Performance of NFFlatten.collectFunctions: time 0.00493/0.6583, allocations: 1.661 MB / 1.145 GB, free: 13.53 MB / 0.7292 GB Notification: Performance of NFScalarize.scalarize: time 0.0006912/0.659, allocations: 321.2 kB / 1.145 GB, free: 13.36 MB / 0.7292 GB Notification: Performance of NFVerifyModel.verify: time 0.002205/0.6612, allocations: 0.8972 MB / 1.146 GB, free: 12.83 MB / 0.7292 GB Notification: Performance of NFConvertDAE.convert: time 0.006412/0.6677, allocations: 3.335 MB / 1.149 GB, free: 11.85 MB / 0.7292 GB Notification: Performance of FrontEnd - DAE generated: time 7.073e-06/0.6677, allocations: 4.969 kB / 1.149 GB, free: 11.85 MB / 0.7292 GB Notification: Performance of FrontEnd: time 1.714e-06/0.6677, allocations: 0 / 1.149 GB, free: 11.85 MB / 0.7292 GB Notification: Performance of Transformations before backend: time 9.985e-05/0.6678, allocations: 0 / 1.149 GB, free: 11.85 MB / 0.7292 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 294 * Number of variables: 294 Notification: Performance of Generate backend data structure: time 0.004907/0.6727, allocations: 1.941 MB / 1.151 GB, free: 10.58 MB / 0.7292 GB Notification: Performance of prepare preOptimizeDAE: time 4.404e-05/0.6728, allocations: 8.844 kB / 1.151 GB, free: 10.58 MB / 0.7292 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.006718/0.6795, allocations: 0.7018 MB / 1.152 GB, free: 10.45 MB / 0.7292 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.005606/0.6851, allocations: 1.528 MB / 1.153 GB, free: 9.496 MB / 0.7292 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0002806/0.6854, allocations: 134.4 kB / 1.153 GB, free: 9.414 MB / 0.7292 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0005003/0.686, allocations: 120 kB / 1.154 GB, free: 9.375 MB / 0.7292 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.006641/0.6926, allocations: 1.631 MB / 1.155 GB, free: 8.629 MB / 0.7292 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.652e-05/0.6927, allocations: 5.312 kB / 1.155 GB, free: 8.625 MB / 0.7292 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0002196/0.6929, allocations: 57.62 kB / 1.155 GB, free: 8.582 MB / 0.7292 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.207e-05/0.693, allocations: 36.94 kB / 1.155 GB, free: 8.578 MB / 0.7292 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.005223/0.6982, allocations: 1.465 MB / 1.157 GB, free: 8.098 MB / 0.7292 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 0.01414/0.7124, allocations: 7.2 MB / 1.164 GB, free: 2.398 MB / 0.7292 GB Notification: Performance of preOpt comSubExp (simulation): time 0.003759/0.7162, allocations: 0.8161 MB / 1.165 GB, free: 1.688 MB / 0.7292 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.003127/0.7193, allocations: 0.5045 MB / 1.165 GB, free: 1.258 MB / 0.7292 GB Notification: Performance of preOpt evalFunc (simulation): time 0.002329/0.7217, allocations: 1.264 MB / 1.166 GB, free: 15.76 MB / 0.7448 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 7.308e-05/0.7218, allocations: 51.77 kB / 1.166 GB, free: 15.7 MB / 0.7448 GB Notification: Performance of pre-optimization done (n=68): time 5.12e-06/0.7218, allocations: 3.938 kB / 1.166 GB, free: 15.7 MB / 0.7448 GB Notification: Performance of matching and sorting (n=68): time 0.0184/0.7402, allocations: 2.227 MB / 1.168 GB, free: 13.89 MB / 0.7448 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001035/0.7404, allocations: 116.1 kB / 1.169 GB, free: 13.76 MB / 0.7448 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.004493/0.7449, allocations: 1.345 MB / 1.17 GB, free: 12.61 MB / 0.7448 GB Notification: Performance of collectPreVariables (initialization): time 0.0002491/0.7452, allocations: 45.7 kB / 1.17 GB, free: 12.55 MB / 0.7448 GB Notification: Performance of collectInitialEqns (initialization): time 0.001138/0.7463, allocations: 0.6894 MB / 1.171 GB, free: 11.92 MB / 0.7448 GB Notification: Performance of collectInitialBindings (initialization): time 0.0005209/0.7469, allocations: 237.9 kB / 1.171 GB, free: 11.71 MB / 0.7448 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001287/0.747, allocations: 16 kB / 1.171 GB, free: 11.69 MB / 0.7448 GB Notification: Performance of setup shared object (initialization): time 0.0002229/0.7473, allocations: 340.3 kB / 1.171 GB, free: 11.36 MB / 0.7448 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.00357/0.7509, allocations: 0.4932 MB / 1.172 GB, free: 10.96 MB / 0.7448 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.003997/0.7549, allocations: 0.773 MB / 1.172 GB, free: 10.19 MB / 0.7448 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.006909/0.7618, allocations: 1.139 MB / 1.174 GB, free: 9.094 MB / 0.7448 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.284e-05/0.7619, allocations: 4 kB / 1.174 GB, free: 9.09 MB / 0.7448 GB Notification: Performance of matching and sorting (n=108) (initialization): time 0.009523/0.7714, allocations: 1.559 MB / 1.175 GB, free: 7.742 MB / 0.7448 GB Notification: Performance of prepare postOptimizeDAE: time 0.0003289/0.7718, allocations: 280.6 kB / 1.175 GB, free: 7.383 MB / 0.7448 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.378e-05/0.7718, allocations: 4 kB / 1.175 GB, free: 7.379 MB / 0.7448 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.003021/0.7748, allocations: 461.2 kB / 1.176 GB, free: 7.004 MB / 0.7448 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002622/0.7775, allocations: 261.3 kB / 1.176 GB, free: 6.812 MB / 0.7448 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00302/0.7805, allocations: 1.073 MB / 1.177 GB, free: 5.777 MB / 0.7448 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00478/0.7853, allocations: 270.8 kB / 1.177 GB, free: 5.566 MB / 0.7448 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.000271/0.7856, allocations: 57.17 kB / 1.177 GB, free: 5.523 MB / 0.7448 GB Notification: Performance of prepare postOptimizeDAE: time 1.945e-05/0.7857, allocations: 4 kB / 1.177 GB, free: 5.52 MB / 0.7448 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.008885/0.7946, allocations: 1.395 MB / 1.179 GB, free: 4.34 MB / 0.7448 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.967e-05/0.7946, allocations: 4.562 kB / 1.179 GB, free: 4.336 MB / 0.7448 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.002585/0.7972, allocations: 455.8 kB / 1.179 GB, free: 3.969 MB / 0.7448 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002749/0.8, allocations: 261 kB / 1.179 GB, free: 3.777 MB / 0.7448 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002766/0.8028, allocations: 1.07 MB / 1.18 GB, free: 2.746 MB / 0.7448 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.004133/0.807, allocations: 253.8 kB / 1.181 GB, free: 2.547 MB / 0.7448 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002861/0.8073, allocations: 53.12 kB / 1.181 GB, free: 2.508 MB / 0.7448 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 28 * Number of states: 0 () * Number of discrete variables: 2 ($PRE.heaPum.com.isOn,heaPum.com.isOn) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (82): * Single equations (assignments): 81 * 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 {(4,23)} Notification: Performance of prepare postOptimizeDAE: time 0.001604/0.8089, allocations: 453.8 kB / 1.181 GB, free: 2.066 MB / 0.7448 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0007353/0.8097, allocations: 150.2 kB / 1.181 GB, free: 1.918 MB / 0.7448 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.007993/0.8177, allocations: 1.327 MB / 1.183 GB, free: 0.8086 MB / 0.7448 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.869e-05/0.8178, allocations: 8.703 kB / 1.183 GB, free: 0.8008 MB / 0.7448 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.532e-05/0.8178, allocations: 3.938 kB / 1.183 GB, free: 0.7969 MB / 0.7448 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.006729/0.8245, allocations: 1.133 MB / 1.184 GB, free: 15.8 MB / 0.7605 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.01506/0.8396, allocations: 3.423 MB / 1.187 GB, free: 12.23 MB / 0.7605 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.161e-05/0.8397, allocations: 4 kB / 1.187 GB, free: 12.23 MB / 0.7605 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001835/0.8416, allocations: 163.8 kB / 1.187 GB, free: 12.07 MB / 0.7605 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.002782/0.8444, allocations: 443.1 kB / 1.188 GB, free: 11.64 MB / 0.7605 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001421/0.8445, allocations: 23.97 kB / 1.188 GB, free: 11.61 MB / 0.7605 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.002803/0.8474, allocations: 1.069 MB / 1.189 GB, free: 10.52 MB / 0.7605 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.679e-05/0.8474, allocations: 8 kB / 1.189 GB, free: 10.51 MB / 0.7605 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.007804/0.8552, allocations: 1.393 MB / 1.19 GB, free: 9.047 MB / 0.7605 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001719/0.857, allocations: 391 kB / 1.19 GB, free: 8.645 MB / 0.7605 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000693/0.8577, allocations: 16 kB / 1.19 GB, free: 8.629 MB / 0.7605 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.003595/0.8613, allocations: 160.3 kB / 1.191 GB, free: 8.473 MB / 0.7605 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002367/0.8616, allocations: 56.25 kB / 1.191 GB, free: 8.418 MB / 0.7605 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.000262/0.8619, allocations: 47.95 kB / 1.191 GB, free: 8.371 MB / 0.7605 GB Notification: Performance of sorting global known variables: time 0.003244/0.8652, allocations: 0.9457 MB / 1.192 GB, free: 7.426 MB / 0.7605 GB Notification: Performance of sort global known variables: time 5.61e-07/0.8652, allocations: 0 / 1.192 GB, free: 7.426 MB / 0.7605 GB Notification: Performance of remove unused functions: time 0.005171/0.8704, allocations: 0.8889 MB / 1.193 GB, free: 6.535 MB / 0.7605 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 17 * Number of states: 0 () * Number of discrete variables: 1 (heaPum.com.isOn) * Number of discrete states: 1 (heaPum.com.isOn) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (42): * Single equations (assignments): 39 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 2 * 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 {(4,23)} Notification: Performance of Backend phase and start with SimCode phase: time 0.002437/0.8728, allocations: 0.5526 MB / 1.193 GB, free: 5.988 MB / 0.7605 GB Notification: Performance of simCode: created initialization part: time 0.01127/0.8841, allocations: 1.841 MB / 1.195 GB, free: 4.152 MB / 0.7605 GB Notification: Performance of simCode: created event and clocks part: time 1.663e-05/0.8842, allocations: 7.781 kB / 1.195 GB, free: 4.145 MB / 0.7605 GB Notification: Performance of simCode: created simulation system equations: time 0.002892/0.8871, allocations: 0.5296 MB / 1.195 GB, free: 3.617 MB / 0.7605 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.007623/0.8947, allocations: 0.8131 MB / 1.196 GB, free: 2.812 MB / 0.7605 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01014/0.9049, allocations: 3.124 MB / 1.199 GB, free: 15.61 MB / 0.7761 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001438/0.9064, allocations: 1.211 MB / 1.2 GB, free: 14.37 MB / 0.7761 GB Notification: Performance of simCode: alias equations: time 0.003894/0.9103, allocations: 343.7 kB / 1.201 GB, free: 14.03 MB / 0.7761 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0006694/0.9111, allocations: 127.3 kB / 1.201 GB, free: 13.91 MB / 0.7761 GB Notification: Performance of SimCode: time 4.369e-06/0.9111, allocations: 0 / 1.201 GB, free: 13.91 MB / 0.7761 GB Notification: Performance of Templates: time 0.1089/1.02, allocations: 37.88 MB / 1.238 GB, free: 8.418 MB / 0.8073 GB make -j1 -f Buildings_latest_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_Static.makefile (rm -f Buildings_latest_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_Static.pipe ; mkfifo Buildings_latest_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_Static.pipe ; head -c 1048576 < Buildings_latest_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_Static.pipe >> ../files/Buildings_latest_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_Static.sim & ./Buildings_latest_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_Static -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_latest_Buildings.Fluid.HeatPumps.Validation.ReciprocatingWaterToWater_Static.pipe 2>&1)