Running: ./testmodel.py --libraries=/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.Fluid.Examples.Performance.Example2.conf.json loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 8.1.1-maint.8.1.x/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 8.1.1 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 8.1.1-maint.8.1.x/package.mo) Running command: translateModel(Buildings.Fluid.Examples.Performance.Example2,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.Examples.Performance.Example2") translateModel(Buildings.Fluid.Examples.Performance.Example2,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.Examples.Performance.Example2") Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 8.1.1-maint.8.1.x/package.mo): time 1.662/1.662, allocations: 297.4 MB / 312.6 MB, free: 2.926 MB / 234.7 MB Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.00113/0.00113, allocations: 186 kB / 382.3 MB, free: 14.82 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 1.355/1.355, allocations: 225.7 MB / 0.6617 GB, free: 7.188 MB / 490.7 MB Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0009467/0.0009468, allocations: 93.89 kB / 0.7789 GB, free: 46.8 MB / 0.5417 GB Notification: Performance of FrontEnd - loaded program: time 0.0003729/0.000373, allocations: 12 kB / 0.9058 GB, free: 4.922 MB / 0.6198 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.585/0.5854, allocations: 119.2 MB / 1.022 GB, free: 57.54 MB / 0.698 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Examples.Performance.Example2): time 0.02601/0.6114, allocations: 29.28 MB / 1.051 GB, free: 36.31 MB / 0.698 GB Notification: Performance of NFInst.instExpressions: time 0.01734/0.6288, allocations: 18.34 MB / 1.069 GB, free: 20.91 MB / 0.698 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001758/0.6306, allocations: 36.97 kB / 1.069 GB, free: 20.89 MB / 0.698 GB Notification: Performance of NFTyping.typeComponents: time 0.001925/0.6325, allocations: 0.6007 MB / 1.069 GB, free: 20.59 MB / 0.698 GB Notification: Performance of NFTyping.typeBindings: time 0.003647/0.6362, allocations: 1.337 MB / 1.071 GB, free: 19.84 MB / 0.698 GB Notification: Performance of NFTyping.typeClassSections: time 0.003389/0.6396, allocations: 1.255 MB / 1.072 GB, free: 19.19 MB / 0.698 GB Notification: Performance of NFFlatten.flatten: time 0.004998/0.6446, allocations: 4.994 MB / 1.077 GB, free: 17.38 MB / 0.698 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001821/0.6465, allocations: 1.106 MB / 1.078 GB, free: 16.96 MB / 0.698 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002541/0.649, allocations: 1.269 MB / 1.079 GB, free: 16.46 MB / 0.698 GB Notification: Performance of NFSimplifyModel.simplify: time 0.00186/0.6509, allocations: 1.04 MB / 1.08 GB, free: 16.02 MB / 0.698 GB Notification: Performance of NFPackage.collectConstants: time 0.000378/0.6513, allocations: 53.22 kB / 1.08 GB, free: 16.02 MB / 0.698 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002571/0.6539, allocations: 1.032 MB / 1.081 GB, free: 15.72 MB / 0.698 GB Notification: Performance of NFScalarize.scalarize: time 0.000599/0.6545, allocations: 323.1 kB / 1.082 GB, free: 15.57 MB / 0.698 GB Notification: Performance of NFVerifyModel.verify: time 0.001295/0.6558, allocations: 0.7397 MB / 1.082 GB, free: 15.12 MB / 0.698 GB Notification: Performance of NFConvertDAE.convert: time 0.003499/0.6593, allocations: 2.358 MB / 1.085 GB, free: 14.41 MB / 0.698 GB Notification: Performance of FrontEnd - DAE generated: time 5.47e-06/0.6593, allocations: 6.781 kB / 1.085 GB, free: 14.41 MB / 0.698 GB Notification: Performance of FrontEnd: time 1.382e-06/0.6593, allocations: 4 kB / 1.085 GB, free: 14.41 MB / 0.698 GB Notification: Performance of Transformations before backend: time 7.7e-05/0.6594, allocations: 0 / 1.085 GB, free: 14.41 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: 188 * Number of variables: 188 Notification: Performance of Generate backend data structure: time 0.003077/0.6625, allocations: 1.689 MB / 1.086 GB, free: 13.29 MB / 0.698 GB Notification: Performance of prepare preOptimizeDAE: time 4.653e-05/0.6625, allocations: 9.625 kB / 1.086 GB, free: 13.29 MB / 0.698 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001029/0.6636, allocations: 259.7 kB / 1.086 GB, free: 13.2 MB / 0.698 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002012/0.6656, allocations: 1.322 MB / 1.088 GB, free: 12.45 MB / 0.698 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.614e-05/0.6657, allocations: 65.62 kB / 1.088 GB, free: 12.42 MB / 0.698 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.000122/0.6658, allocations: 81.62 kB / 1.088 GB, free: 12.4 MB / 0.698 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001615/0.6674, allocations: 1.025 MB / 1.089 GB, free: 11.92 MB / 0.698 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.23e-05/0.6675, allocations: 0 / 1.089 GB, free: 11.92 MB / 0.698 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 7.381e-05/0.6675, allocations: 38.73 kB / 1.089 GB, free: 11.89 MB / 0.698 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.413e-05/0.6676, allocations: 21.78 kB / 1.089 GB, free: 11.89 MB / 0.698 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001504/0.6691, allocations: 0.7914 MB / 1.09 GB, free: 11.63 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 0.004988/0.6741, allocations: 5.135 MB / 1.095 GB, free: 7.832 MB / 0.698 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001289/0.6754, allocations: 0.6423 MB / 1.095 GB, free: 7.613 MB / 0.698 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.000623/0.676, allocations: 360.4 kB / 1.096 GB, free: 7.496 MB / 0.698 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001918/0.6779, allocations: 1.689 MB / 1.097 GB, free: 6.234 MB / 0.698 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0007239/0.6787, allocations: 377.2 kB / 1.098 GB, free: 6.094 MB / 0.698 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0003517/0.679, allocations: 101.2 kB / 1.098 GB, free: 6.059 MB / 0.698 GB Notification: Performance of pre-optimization done (n=44): time 2.154e-06/0.6791, allocations: 0 / 1.098 GB, free: 6.059 MB / 0.698 GB Notification: Performance of matching and sorting (n=44): time 0.00335/0.6824, allocations: 1.391 MB / 1.099 GB, free: 5.59 MB / 0.698 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.73e-05/0.6824, allocations: 58.62 kB / 1.099 GB, free: 5.523 MB / 0.698 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001361/0.6838, allocations: 1.311 MB / 1.1 GB, free: 5.027 MB / 0.698 GB Notification: Performance of collectPreVariables (initialization): time 4.702e-05/0.6839, allocations: 40.02 kB / 1.101 GB, free: 4.988 MB / 0.698 GB Notification: Performance of collectInitialEqns (initialization): time 0.0003949/0.6843, allocations: 0.6393 MB / 1.101 GB, free: 4.488 MB / 0.698 GB Notification: Performance of collectInitialBindings (initialization): time 9.591e-05/0.6844, allocations: 152.2 kB / 1.101 GB, free: 4.367 MB / 0.698 GB Notification: Performance of simplifyInitialFunctions (initialization): time 3.24e-05/0.6844, allocations: 15.28 kB / 1.101 GB, free: 4.355 MB / 0.698 GB Notification: Performance of setup shared object (initialization): time 5.709e-05/0.6845, allocations: 339 kB / 1.102 GB, free: 4.035 MB / 0.698 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005781/0.6851, allocations: 297.3 kB / 1.102 GB, free: 3.953 MB / 0.698 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0007113/0.6858, allocations: 0.6506 MB / 1.103 GB, free: 3.422 MB / 0.698 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001243/0.687, allocations: 0.8927 MB / 1.103 GB, free: 2.852 MB / 0.698 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.599e-06/0.6871, allocations: 3.25 kB / 1.103 GB, free: 2.852 MB / 0.698 GB Notification: Performance of matching and sorting (n=85) (initialization): time 0.002227/0.6893, allocations: 1.213 MB / 1.105 GB, free: 2.391 MB / 0.698 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001429/0.6894, allocations: 358.6 kB / 1.105 GB, free: 1.945 MB / 0.698 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.363e-05/0.6895, allocations: 9.953 kB / 1.105 GB, free: 1.945 MB / 0.698 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0008151/0.6903, allocations: 249.5 kB / 1.105 GB, free: 1.891 MB / 0.698 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005224/0.6908, allocations: 157.5 kB / 1.105 GB, free: 1.867 MB / 0.698 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0007129/0.6915, allocations: 0.8576 MB / 1.106 GB, free: 1.254 MB / 0.698 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0009577/0.6925, allocations: 94.12 kB / 1.106 GB, free: 1.23 MB / 0.698 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.968e-05/0.6926, allocations: 40.95 kB / 1.106 GB, free: 1.223 MB / 0.698 GB Notification: Performance of prepare postOptimizeDAE: time 8.976e-06/0.6926, allocations: 7.094 kB / 1.106 GB, free: 1.219 MB / 0.698 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.00145/0.6941, allocations: 0.8708 MB / 1.107 GB, free: 0.8828 MB / 0.698 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.045e-05/0.6941, allocations: 9.656 kB / 1.107 GB, free: 0.8828 MB / 0.698 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0003557/0.6944, allocations: 145.3 kB / 1.107 GB, free: 0.8477 MB / 0.698 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004624/0.6949, allocations: 141.5 kB / 1.107 GB, free: 0.832 MB / 0.698 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002374/0.6973, allocations: 2.348 MB / 1.11 GB, free: 15.05 MB / 0.7136 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0009934/0.6983, allocations: 81.55 kB / 1.11 GB, free: 15.03 MB / 0.7136 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.47e-05/0.6984, allocations: 40.28 kB / 1.11 GB, free: 15.02 MB / 0.7136 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 35 * Number of states: 0 () * Number of discrete variables: 7 ($whenCondition1,$PRE.pulse.T_start,pulse.T_start,$PRE.pulse.count,pulse.count,nRes.y,from_dp.y) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (72): * Single equations (assignments): 69 * 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 {(5,7)} Notification: Performance of prepare postOptimizeDAE: time 0.0007865/0.6992, allocations: 470.5 kB / 1.11 GB, free: 14.71 MB / 0.7136 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001829/0.6994, allocations: 127 kB / 1.11 GB, free: 14.65 MB / 0.7136 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002103/0.7015, allocations: 0.9512 MB / 1.111 GB, free: 14.29 MB / 0.7136 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.259e-05/0.7015, allocations: 5.438 kB / 1.111 GB, free: 14.29 MB / 0.7136 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.623e-06/0.7015, allocations: 0 / 1.111 GB, free: 14.29 MB / 0.7136 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001654/0.7032, allocations: 0.9516 MB / 1.112 GB, free: 13.72 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 0.003537/0.7067, allocations: 1.984 MB / 1.114 GB, free: 12.77 MB / 0.7136 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.22e-06/0.7068, allocations: 1.406 kB / 1.114 GB, free: 12.77 MB / 0.7136 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004379/0.7072, allocations: 92.39 kB / 1.114 GB, free: 12.75 MB / 0.7136 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0003269/0.7075, allocations: 153.6 kB / 1.114 GB, free: 12.7 MB / 0.7136 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.056e-05/0.7076, allocations: 16.56 kB / 1.114 GB, free: 12.7 MB / 0.7136 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0007286/0.7083, allocations: 0.8128 MB / 1.115 GB, free: 12.09 MB / 0.7136 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.458e-06/0.7083, allocations: 0 / 1.115 GB, free: 12.09 MB / 0.7136 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002379/0.7107, allocations: 1.305 MB / 1.117 GB, free: 11.5 MB / 0.7136 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0004341/0.7112, allocations: 283.4 kB / 1.117 GB, free: 11.3 MB / 0.7136 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001381/0.7113, allocations: 15.44 kB / 1.117 GB, free: 11.29 MB / 0.7136 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0006831/0.712, allocations: 78.98 kB / 1.117 GB, free: 11.27 MB / 0.7136 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001031/0.7121, allocations: 49.58 kB / 1.117 GB, free: 11.26 MB / 0.7136 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.991e-05/0.7122, allocations: 21.58 kB / 1.117 GB, free: 11.26 MB / 0.7136 GB Notification: Performance of sorting global known variables: time 0.001177/0.7134, allocations: 0.9063 MB / 1.118 GB, free: 10.91 MB / 0.7136 GB Notification: Performance of sort global known variables: time 1.4e-07/0.7134, allocations: 1.312 kB / 1.118 GB, free: 10.91 MB / 0.7136 GB Notification: Performance of remove unused functions: time 0.001964/0.7153, allocations: 0.6826 MB / 1.119 GB, free: 10.78 MB / 0.7136 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 1 (pump_dp.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 (39): * Single equations (assignments): 33 * 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 {(5,7)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0008052/0.7162, allocations: 372.5 kB / 1.119 GB, free: 10.61 MB / 0.7136 GB Notification: Performance of simCode: created initialization part: time 0.002979/0.7192, allocations: 1.458 MB / 1.12 GB, free: 10.01 MB / 0.7136 GB Notification: Performance of simCode: created event and clocks part: time 3.146e-06/0.7192, allocations: 1.375 kB / 1.12 GB, free: 10.01 MB / 0.7136 GB Notification: Performance of simCode: created simulation system equations: time 0.000821/0.72, allocations: 364.7 kB / 1.121 GB, free: 9.902 MB / 0.7136 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002599/0.7226, allocations: 0.5842 MB / 1.121 GB, free: 9.754 MB / 0.7136 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.00388/0.7265, allocations: 2.752 MB / 1.124 GB, free: 8.188 MB / 0.7136 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007802/0.7273, allocations: 1.265 MB / 1.125 GB, free: 7.41 MB / 0.7136 GB Notification: Performance of simCode: alias equations: time 0.001194/0.7285, allocations: 298.5 kB / 1.125 GB, free: 7.34 MB / 0.7136 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002461/0.7288, allocations: 111.4 kB / 1.126 GB, free: 7.32 MB / 0.7136 GB Notification: Performance of SimCode: time 3.1e-07/0.7288, allocations: 3.938 kB / 1.126 GB, free: 7.316 MB / 0.7136 GB Notification: Performance of Templates: time 0.04667/0.7754, allocations: 25.89 MB / 1.151 GB, free: 11.69 MB / 0.7292 GB make -j1 -f Buildings_8_Buildings.Fluid.Examples.Performance.Example2.makefile (rm -f Buildings_8_Buildings.Fluid.Examples.Performance.Example2.pipe ; mkfifo Buildings_8_Buildings.Fluid.Examples.Performance.Example2.pipe ; head -c 1048576 < Buildings_8_Buildings.Fluid.Examples.Performance.Example2.pipe >> ../files/Buildings_8_Buildings.Fluid.Examples.Performance.Example2.sim & ./Buildings_8_Buildings.Fluid.Examples.Performance.Example2 -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.Fluid.Examples.Performance.Example2.pipe 2>&1)