Running: ./testmodel.py --libraries=/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_latest_Buildings.Fluid.Examples.Performance.Example3.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.Examples.Performance.Example3,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_latest_Buildings.Fluid.Examples.Performance.Example3") translateModel(Buildings.Fluid.Examples.Performance.Example3,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_latest_Buildings.Fluid.Examples.Performance.Example3") Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 9.0.0-master/package.mo): time 1.679/1.679, allocations: 306.1 MB / 321.4 MB, free: 10.71 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 0.000984/0.0009841, allocations: 183.3 kB / 393.1 MB, free: 4.094 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 1.358/1.358, allocations: 225.7 MB / 0.6743 GB, free: 12.54 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 0.0008745/0.0008744, allocations: 96.92 kB / 0.7935 GB, free: 40.17 MB / 0.5417 GB Notification: Performance of FrontEnd - loaded program: time 0.0003488/0.000349, allocations: 8 kB / 0.9224 GB, free: 8.688 MB / 0.6355 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.6263/0.6267, allocations: 121.3 MB / 1.041 GB, free: 58.74 MB / 0.698 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Examples.Performance.Example3): time 0.02637/0.6531, allocations: 32.33 MB / 1.072 GB, free: 34.87 MB / 0.698 GB Notification: Performance of NFInst.instExpressions: time 0.0153/0.6685, allocations: 14.43 MB / 1.087 GB, free: 22.49 MB / 0.698 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002158/0.6707, allocations: 35.12 kB / 1.087 GB, free: 22.48 MB / 0.698 GB Notification: Performance of NFTyping.typeComponents: time 0.002042/0.6727, allocations: 0.6346 MB / 1.087 GB, free: 22.16 MB / 0.698 GB Notification: Performance of NFTyping.typeBindings: time 0.003937/0.6767, allocations: 1.445 MB / 1.089 GB, free: 21.35 MB / 0.698 GB Notification: Performance of NFTyping.typeClassSections: time 0.002995/0.6797, allocations: 1.285 MB / 1.09 GB, free: 20.68 MB / 0.698 GB Notification: Performance of NFFlatten.flatten: time 0.00571/0.6854, allocations: 6.399 MB / 1.096 GB, free: 18.35 MB / 0.698 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002368/0.6878, allocations: 1.726 MB / 1.098 GB, free: 17.71 MB / 0.698 GB Notification: Performance of NFEvalConstants.evaluate: time 0.003331/0.6912, allocations: 1.645 MB / 1.099 GB, free: 17.05 MB / 0.698 GB Notification: Performance of NFSimplifyModel.simplify: time 0.00237/0.6936, allocations: 1.366 MB / 1.101 GB, free: 16.46 MB / 0.698 GB Notification: Performance of NFPackage.collectConstants: time 0.0002286/0.6938, allocations: 68.97 kB / 1.101 GB, free: 16.46 MB / 0.698 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002811/0.6966, allocations: 1.048 MB / 1.102 GB, free: 16.17 MB / 0.698 GB Notification: Performance of NFScalarize.scalarize: time 0.0004668/0.6971, allocations: 395.9 kB / 1.102 GB, free: 15.98 MB / 0.698 GB Notification: Performance of NFVerifyModel.verify: time 0.001318/0.6984, allocations: 0.9488 MB / 1.103 GB, free: 15.41 MB / 0.698 GB Notification: Performance of NFConvertDAE.convert: time 0.00371/0.7021, allocations: 2.843 MB / 1.106 GB, free: 14.55 MB / 0.698 GB Notification: Performance of FrontEnd - DAE generated: time 5.661e-06/0.7022, allocations: 0 / 1.106 GB, free: 14.55 MB / 0.698 GB Notification: Performance of FrontEnd: time 1.924e-06/0.7022, allocations: 1.094 kB / 1.106 GB, free: 14.55 MB / 0.698 GB Notification: Performance of Transformations before backend: time 3.237e-05/0.7022, allocations: 0 / 1.106 GB, free: 14.55 MB / 0.698 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 235 * Number of variables: 235 Notification: Performance of Generate backend data structure: time 0.003541/0.7058, allocations: 2.081 MB / 1.108 GB, free: 13.2 MB / 0.698 GB Notification: Performance of prepare preOptimizeDAE: time 4.495e-05/0.7058, allocations: 8.844 kB / 1.108 GB, free: 13.2 MB / 0.698 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.00112/0.7069, allocations: 308.9 kB / 1.108 GB, free: 13.09 MB / 0.698 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002746/0.7097, allocations: 1.641 MB / 1.11 GB, free: 12.22 MB / 0.698 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 7.382e-05/0.7098, allocations: 78.56 kB / 1.11 GB, free: 12.18 MB / 0.698 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001673/0.71, allocations: 110.9 kB / 1.11 GB, free: 12.15 MB / 0.698 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002119/0.7121, allocations: 1.322 MB / 1.111 GB, free: 11.54 MB / 0.698 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.535e-05/0.7121, allocations: 13.66 kB / 1.111 GB, free: 11.53 MB / 0.698 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 9.226e-05/0.7122, allocations: 38.59 kB / 1.111 GB, free: 11.5 MB / 0.698 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.193e-05/0.7123, allocations: 23.88 kB / 1.111 GB, free: 11.5 MB / 0.698 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001952/0.7142, allocations: 1.053 MB / 1.112 GB, free: 11.15 MB / 0.698 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 0.00695/0.7212, allocations: 6.998 MB / 1.119 GB, free: 5.898 MB / 0.698 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001424/0.7226, allocations: 0.6775 MB / 1.12 GB, free: 5.656 MB / 0.698 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0007474/0.7234, allocations: 430.2 kB / 1.12 GB, free: 5.512 MB / 0.698 GB Notification: Performance of preOpt evalFunc (simulation): time 0.002905/0.7263, allocations: 1.828 MB / 1.122 GB, free: 4.254 MB / 0.698 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0007962/0.7271, allocations: 412.4 kB / 1.122 GB, free: 4.105 MB / 0.698 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0007039/0.7278, allocations: 102.6 kB / 1.123 GB, free: 4.059 MB / 0.698 GB Notification: Performance of pre-optimization done (n=46): time 2.845e-06/0.7278, allocations: 3.938 kB / 1.123 GB, free: 4.055 MB / 0.698 GB Notification: Performance of matching and sorting (n=46): time 0.004198/0.732, allocations: 1.541 MB / 1.124 GB, free: 3.516 MB / 0.698 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.943e-05/0.7321, allocations: 63.72 kB / 1.124 GB, free: 3.449 MB / 0.698 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.00254/0.7346, allocations: 1.844 MB / 1.126 GB, free: 2.766 MB / 0.698 GB Notification: Performance of collectPreVariables (initialization): time 7.532e-05/0.7347, allocations: 40.23 kB / 1.126 GB, free: 2.727 MB / 0.698 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006126/0.7353, allocations: 0.8519 MB / 1.127 GB, free: 2.055 MB / 0.698 GB Notification: Performance of collectInitialBindings (initialization): time 0.000121/0.7355, allocations: 160.8 kB / 1.127 GB, free: 1.934 MB / 0.698 GB Notification: Performance of simplifyInitialFunctions (initialization): time 3.889e-05/0.7355, allocations: 15.62 kB / 1.127 GB, free: 1.922 MB / 0.698 GB Notification: Performance of setup shared object (initialization): time 6.09e-05/0.7356, allocations: 337.8 kB / 1.127 GB, free: 1.602 MB / 0.698 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0007429/0.7363, allocations: 347.4 kB / 1.128 GB, free: 1.5 MB / 0.698 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0009252/0.7373, allocations: 0.8159 MB / 1.128 GB, free: 0.7969 MB / 0.698 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001517/0.7388, allocations: 1.059 MB / 1.129 GB, free: 88 kB / 0.698 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 7.123e-06/0.7388, allocations: 2.469 kB / 1.129 GB, free: 88 kB / 0.698 GB Notification: Performance of matching and sorting (n=99) (initialization): time 0.003207/0.742, allocations: 1.426 MB / 1.131 GB, free: 15.53 MB / 0.7136 GB Notification: Performance of prepare postOptimizeDAE: time 0.0002899/0.7423, allocations: 422.3 kB / 1.131 GB, free: 14.99 MB / 0.7136 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.122e-05/0.7424, allocations: 14.86 kB / 1.131 GB, free: 14.99 MB / 0.7136 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0009174/0.7433, allocations: 235.6 kB / 1.132 GB, free: 14.95 MB / 0.7136 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0007112/0.744, allocations: 182.8 kB / 1.132 GB, free: 14.92 MB / 0.7136 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0008608/0.7449, allocations: 0.8452 MB / 1.133 GB, free: 14.29 MB / 0.7136 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001645/0.7465, allocations: 129.4 kB / 1.133 GB, free: 14.26 MB / 0.7136 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001015/0.7467, allocations: 43.38 kB / 1.133 GB, free: 14.26 MB / 0.7136 GB Notification: Performance of prepare postOptimizeDAE: time 9.958e-06/0.7467, allocations: 3.594 kB / 1.133 GB, free: 14.26 MB / 0.7136 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.001984/0.7487, allocations: 1.034 MB / 1.134 GB, free: 13.86 MB / 0.7136 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.215e-05/0.7487, allocations: 9.625 kB / 1.134 GB, free: 13.86 MB / 0.7136 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0004027/0.7491, allocations: 163.5 kB / 1.134 GB, free: 13.82 MB / 0.7136 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005659/0.7497, allocations: 161.2 kB / 1.134 GB, free: 13.8 MB / 0.7136 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002874/0.7526, allocations: 2.353 MB / 1.136 GB, free: 12.07 MB / 0.7136 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001673/0.7543, allocations: 110.8 kB / 1.136 GB, free: 12.05 MB / 0.7136 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 9.714e-05/0.7544, allocations: 44.69 kB / 1.136 GB, free: 12.04 MB / 0.7136 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 46 * Number of states: 0 () * Number of discrete variables: 8 ($whenCondition1,$PRE.pulse.T_start,pulse.T_start,$PRE.pulse.count,pulse.count,nRes.y,from_dp.y,mergeDp.y) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (85): * Single equations (assignments): 82 * Array equations: 1 * Algorithm blocks: 1 * 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 {(1,12)} Notification: Performance of prepare postOptimizeDAE: time 0.0012/0.7556, allocations: 0.5912 MB / 1.137 GB, free: 11.69 MB / 0.7136 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000362/0.7559, allocations: 175.2 kB / 1.137 GB, free: 11.6 MB / 0.7136 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002476/0.7584, allocations: 1.078 MB / 1.138 GB, free: 11.19 MB / 0.7136 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.53e-05/0.7585, allocations: 7.016 kB / 1.138 GB, free: 11.19 MB / 0.7136 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.637e-06/0.7585, allocations: 0.7031 kB / 1.138 GB, free: 11.19 MB / 0.7136 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.00185/0.7603, allocations: 1.028 MB / 1.139 GB, free: 10.59 MB / 0.7136 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 postOpt removeSimpleEquations (simulation): time 0.004565/0.7649, allocations: 2.31 MB / 1.142 GB, free: 8.969 MB / 0.7136 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.949e-06/0.7649, allocations: 0 / 1.142 GB, free: 8.969 MB / 0.7136 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004998/0.7654, allocations: 99.27 kB / 1.142 GB, free: 8.891 MB / 0.7136 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0003515/0.7658, allocations: 149.9 kB / 1.142 GB, free: 8.77 MB / 0.7136 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.903e-05/0.7658, allocations: 15.38 kB / 1.142 GB, free: 8.758 MB / 0.7136 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0007276/0.7666, allocations: 0.8196 MB / 1.143 GB, free: 7.973 MB / 0.7136 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.495e-06/0.7666, allocations: 0 / 1.143 GB, free: 7.973 MB / 0.7136 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002882/0.7695, allocations: 1.475 MB / 1.144 GB, free: 6.66 MB / 0.7136 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0008582/0.7704, allocations: 350.3 kB / 1.144 GB, free: 6.34 MB / 0.7136 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0003764/0.7707, allocations: 12.66 kB / 1.144 GB, free: 6.328 MB / 0.7136 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001071/0.7718, allocations: 96.03 kB / 1.144 GB, free: 6.262 MB / 0.7136 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001146/0.7719, allocations: 38.78 kB / 1.144 GB, free: 6.238 MB / 0.7136 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.837e-05/0.772, allocations: 32.38 kB / 1.145 GB, free: 6.211 MB / 0.7136 GB Notification: Performance of sorting global known variables: time 0.001916/0.7739, allocations: 1.274 MB / 1.146 GB, free: 5.148 MB / 0.7136 GB Notification: Performance of sort global known variables: time 1.6e-07/0.7739, allocations: 0 / 1.146 GB, free: 5.148 MB / 0.7136 GB Notification: Performance of remove unused functions: time 0.002521/0.7765, allocations: 0.8504 MB / 1.147 GB, free: 4.305 MB / 0.7136 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 1 (pump.vol.dynBal.U) * Number of discrete variables: 3 ($whenCondition1,pulse.T_start,pulse.count) * Number of discrete states: 1 (pulse.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (40): * Single equations (assignments): 34 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 3 * When equations: 2 * 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 {(1,12)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0009191/0.7774, allocations: 386.3 kB / 1.147 GB, free: 3.961 MB / 0.7136 GB Notification: Performance of simCode: created initialization part: time 0.003196/0.7806, allocations: 1.558 MB / 1.148 GB, free: 2.574 MB / 0.7136 GB Notification: Performance of simCode: created event and clocks part: time 4.228e-06/0.7806, allocations: 0.9375 kB / 1.148 GB, free: 2.574 MB / 0.7136 GB Notification: Performance of simCode: created simulation system equations: time 0.0008234/0.7815, allocations: 384.2 kB / 1.149 GB, free: 2.254 MB / 0.7136 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003973/0.7854, allocations: 0.8422 MB / 1.15 GB, free: 1.621 MB / 0.7136 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.005699/0.7912, allocations: 3.525 MB / 1.153 GB, free: 14.39 MB / 0.7292 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001487/0.7927, allocations: 1.496 MB / 1.155 GB, free: 13.13 MB / 0.7292 GB Notification: Performance of simCode: alias equations: time 0.001902/0.7946, allocations: 436.5 kB / 1.155 GB, free: 12.8 MB / 0.7292 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000375/0.795, allocations: 131.5 kB / 1.155 GB, free: 12.68 MB / 0.7292 GB Notification: Performance of SimCode: time 6.31e-07/0.795, allocations: 0 / 1.155 GB, free: 12.68 MB / 0.7292 GB Notification: Performance of Templates: time 0.05714/0.8521, allocations: 32.97 MB / 1.187 GB, free: 13.13 MB / 0.7605 GB make -j1 -f Buildings_latest_Buildings.Fluid.Examples.Performance.Example3.makefile (rm -f Buildings_latest_Buildings.Fluid.Examples.Performance.Example3.pipe ; mkfifo Buildings_latest_Buildings.Fluid.Examples.Performance.Example3.pipe ; head -c 1048576 < Buildings_latest_Buildings.Fluid.Examples.Performance.Example3.pipe >> ../files/Buildings_latest_Buildings.Fluid.Examples.Performance.Example3.sim & ./Buildings_latest_Buildings.Fluid.Examples.Performance.Example3 -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_latest_Buildings.Fluid.Examples.Performance.Example3.pipe 2>&1)