Running: ./testmodel.py --libraries=/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_7.0.0_Buildings.Fluid.HeatExchangers.Examples.AirHeater_T.conf.json loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 7.0.1/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 7.0.1 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 7.0.1/package.mo) Running command: translateModel(Buildings.Fluid.HeatExchangers.Examples.AirHeater_T,tolerance=1e-08,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_7.0.0_Buildings.Fluid.HeatExchangers.Examples.AirHeater_T") translateModel(Buildings.Fluid.HeatExchangers.Examples.AirHeater_T,tolerance=1e-08,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_7.0.0_Buildings.Fluid.HeatExchangers.Examples.AirHeater_T") Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 7.0.1/package.mo): time 2.313/2.313, allocations: 254.9 MB / 269.9 MB, free: 9.645 MB / 218.7 MB Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.002136/0.002136, allocations: 199.6 kB / 329.5 MB, free: 1.16 MB / 250.7 MB Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 2.564/2.564, allocations: 225.6 MB / 0.6001 GB, free: 0.5039 MB / 426.7 MB Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001496/0.001496, allocations: 97.98 kB / 0.7074 GB, free: 6.234 MB / 0.5261 GB Notification: Performance of FrontEnd - loaded program: time 0.0004957/0.0004959, allocations: 13.31 kB / 0.8242 GB, free: 124.9 MB / 0.5886 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2056/0.2061, allocations: 109.1 MB / 0.9308 GB, free: 24.91 MB / 0.5886 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.HeatExchangers.Examples.AirHeater_T): time 0.9732/1.179, allocations: 215.5 MB / 1.141 GB, free: 6.465 MB / 0.698 GB Notification: Performance of NFInst.instExpressions: time 0.03856/1.218, allocations: 17.29 MB / 1.158 GB, free: 8.742 MB / 0.7136 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.003874/1.222, allocations: 72.56 kB / 1.158 GB, free: 8.711 MB / 0.7136 GB Notification: Performance of NFTyping.typeComponents: time 0.0049/1.227, allocations: 0.9115 MB / 1.159 GB, free: 7.984 MB / 0.7136 GB Notification: Performance of NFTyping.typeBindings: time 0.01112/1.238, allocations: 2.56 MB / 1.162 GB, free: 6.008 MB / 0.7136 GB Notification: Performance of NFTyping.typeClassSections: time 0.01291/1.251, allocations: 2.886 MB / 1.164 GB, free: 4.125 MB / 0.7136 GB Notification: Performance of NFFlatten.flatten: time 0.01117/1.262, allocations: 5.703 MB / 1.17 GB, free: 14.95 MB / 0.7292 GB Notification: Performance of NFFlatten.resolveConnections: time 0.004029/1.266, allocations: 1.491 MB / 1.171 GB, free: 13.43 MB / 0.7292 GB Notification: Performance of NFEvalConstants.evaluate: time 0.007613/1.274, allocations: 2.105 MB / 1.173 GB, free: 11.31 MB / 0.7292 GB Notification: Performance of NFSimplifyModel.simplify: time 0.004319/1.278, allocations: 1.521 MB / 1.175 GB, free: 9.785 MB / 0.7292 GB Notification: Performance of NFPackage.collectConstants: time 0.0008158/1.279, allocations: 91.94 kB / 1.175 GB, free: 9.695 MB / 0.7292 GB Notification: Performance of NFFlatten.collectFunctions: time 0.008655/1.288, allocations: 2.222 MB / 1.177 GB, free: 7.469 MB / 0.7292 GB Notification: Performance of NFScalarize.scalarize: time 0.001717/1.29, allocations: 0.6306 MB / 1.178 GB, free: 6.836 MB / 0.7292 GB Notification: Performance of NFVerifyModel.verify: time 0.00135/1.291, allocations: 472.5 kB / 1.178 GB, free: 6.367 MB / 0.7292 GB Notification: Performance of NFConvertDAE.convert: time 0.007564/1.299, allocations: 3.114 MB / 1.181 GB, free: 3.246 MB / 0.7292 GB Notification: Performance of FrontEnd - DAE generated: time 8.466e-06/1.299, allocations: 0 / 1.181 GB, free: 3.246 MB / 0.7292 GB Notification: Performance of FrontEnd: time 3.336e-06/1.299, allocations: 0 / 1.181 GB, free: 3.246 MB / 0.7292 GB Notification: Performance of Transformations before backend: time 0.0001124/1.299, allocations: 0 / 1.181 GB, free: 3.246 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: 336 * Number of variables: 336 Notification: Performance of Generate backend data structure: time 0.008092/1.307, allocations: 2.512 MB / 1.184 GB, free: 0.668 MB / 0.7292 GB Notification: Performance of prepare preOptimizeDAE: time 5e-05/1.307, allocations: 8.031 kB / 1.184 GB, free: 0.6602 MB / 0.7292 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.008228/1.315, allocations: 0.8009 MB / 1.185 GB, free: 15.86 MB / 0.7448 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.005716/1.321, allocations: 1.592 MB / 1.186 GB, free: 14.21 MB / 0.7448 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0007804/1.322, allocations: 174.9 kB / 1.186 GB, free: 14.04 MB / 0.7448 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0006194/1.322, allocations: 140 kB / 1.186 GB, free: 13.91 MB / 0.7448 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.006105/1.329, allocations: 1.711 MB / 1.188 GB, free: 12.12 MB / 0.7448 GB Notification: Performance of preOpt findStateOrder (simulation): time 5.164e-05/1.329, allocations: 3.938 kB / 1.188 GB, free: 12.11 MB / 0.7448 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0002434/1.329, allocations: 52 kB / 1.188 GB, free: 12.06 MB / 0.7448 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 9.688e-05/1.329, allocations: 58.53 kB / 1.188 GB, free: 12 MB / 0.7448 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.006663/1.336, allocations: 1.489 MB / 1.19 GB, free: 10.51 MB / 0.7448 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 0.01911/1.355, allocations: 7.627 MB / 1.197 GB, free: 2.324 MB / 0.7448 GB Notification: Performance of preOpt comSubExp (simulation): time 0.006522/1.361, allocations: 1.652 MB / 1.199 GB, free: 0.543 MB / 0.7448 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.002824/1.364, allocations: 0.536 MB / 1.199 GB, free: 8 kB / 0.7448 GB Notification: Performance of preOpt evalFunc (simulation): time 0.003176/1.368, allocations: 0.818 MB / 1.2 GB, free: 15.04 MB / 0.7605 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.003501/1.371, allocations: 0.5876 MB / 1.201 GB, free: 14.45 MB / 0.7605 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.001686/1.373, allocations: 119.2 kB / 1.201 GB, free: 14.33 MB / 0.7605 GB Notification: Performance of pre-optimization done (n=84): time 6.031e-06/1.373, allocations: 0 / 1.201 GB, free: 14.33 MB / 0.7605 GB Notification: Performance of matching and sorting (n=84): time 0.009938/1.383, allocations: 1.648 MB / 1.202 GB, free: 12.65 MB / 0.7605 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001236/1.383, allocations: 153.4 kB / 1.202 GB, free: 12.47 MB / 0.7605 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.005189/1.388, allocations: 1.628 MB / 1.204 GB, free: 10.79 MB / 0.7605 GB Notification: Performance of collectPreVariables (initialization): time 0.0003483/1.389, allocations: 45.7 kB / 1.204 GB, free: 10.74 MB / 0.7605 GB Notification: Performance of collectInitialEqns (initialization): time 0.001684/1.39, allocations: 0.9283 MB / 1.205 GB, free: 9.805 MB / 0.7605 GB Notification: Performance of collectInitialBindings (initialization): time 0.0006659/1.391, allocations: 299.7 kB / 1.205 GB, free: 9.508 MB / 0.7605 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001421/1.391, allocations: 20 kB / 1.205 GB, free: 9.488 MB / 0.7605 GB Notification: Performance of setup shared object (initialization): time 0.0002218/1.391, allocations: 353.9 kB / 1.206 GB, free: 9.137 MB / 0.7605 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.002671/1.394, allocations: 462.3 kB / 1.206 GB, free: 8.688 MB / 0.7605 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.003192/1.397, allocations: 0.8352 MB / 1.207 GB, free: 7.695 MB / 0.7605 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.003126/1.401, allocations: 0.5785 MB / 1.207 GB, free: 7.113 MB / 0.7605 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.54e-05/1.401, allocations: 4 kB / 1.207 GB, free: 7.109 MB / 0.7605 GB Notification: Performance of matching and sorting (n=138) (initialization): time 0.007458/1.408, allocations: 1.473 MB / 1.209 GB, free: 5.617 MB / 0.7605 GB Notification: Performance of prepare postOptimizeDAE: time 0.0004077/1.409, allocations: 377.3 kB / 1.209 GB, free: 5.129 MB / 0.7605 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.499e-05/1.409, allocations: 11.98 kB / 1.209 GB, free: 5.117 MB / 0.7605 GB Notification: Performance of postOpt tearingSystem (initialization): time 5.032e-05/1.409, allocations: 16 kB / 1.209 GB, free: 5.102 MB / 0.7605 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.003199/1.412, allocations: 275.6 kB / 1.21 GB, free: 4.832 MB / 0.7605 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 4.836e-05/1.412, allocations: 23.92 kB / 1.21 GB, free: 4.809 MB / 0.7605 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003838/1.416, allocations: 161 kB / 1.21 GB, free: 4.652 MB / 0.7605 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002482/1.416, allocations: 59.98 kB / 1.21 GB, free: 4.594 MB / 0.7605 GB Notification: Performance of prepare postOptimizeDAE: time 1.848e-05/1.416, allocations: 4 kB / 1.21 GB, free: 4.59 MB / 0.7605 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.006582/1.423, allocations: 1.29 MB / 1.211 GB, free: 3.293 MB / 0.7605 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.444e-05/1.423, allocations: 11.98 kB / 1.211 GB, free: 3.281 MB / 0.7605 GB Notification: Performance of postOpt tearingSystem (initialization): time 3.091e-05/1.423, allocations: 12.41 kB / 1.211 GB, free: 3.27 MB / 0.7605 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.003099/1.426, allocations: 275.6 kB / 1.211 GB, free: 3 MB / 0.7605 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 4.672e-05/1.426, allocations: 23.94 kB / 1.211 GB, free: 2.977 MB / 0.7605 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003859/1.43, allocations: 168.3 kB / 1.212 GB, free: 2.812 MB / 0.7605 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.000296/1.43, allocations: 51.98 kB / 1.212 GB, free: 2.762 MB / 0.7605 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 37 * Number of states: 0 () * Number of discrete variables: 6 ($whenCondition1,$PRE.TSet.T_start,TSet.T_start,$PRE.TSet.count,TSet.count,conPI.I.trigger_internal) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (134): * Single equations (assignments): 130 * Array equations: 2 * Algorithm blocks: 1 * Record equations: 1 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.001842/1.432, allocations: 0.5436 MB / 1.212 GB, free: 2.207 MB / 0.7605 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0006669/1.433, allocations: 177.8 kB / 1.212 GB, free: 2.031 MB / 0.7605 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.007228/1.44, allocations: 1.216 MB / 1.213 GB, free: 0.8008 MB / 0.7605 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.583e-05/1.44, allocations: 12 kB / 1.213 GB, free: 0.7891 MB / 0.7605 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.804e-05/1.44, allocations: 0 / 1.213 GB, free: 0.7891 MB / 0.7605 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.006042/1.446, allocations: 1.281 MB / 1.215 GB, free: 15.42 MB / 0.7761 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 0.01395/1.46, allocations: 2.964 MB / 1.218 GB, free: 12.34 MB / 0.7761 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.16e-05/1.46, allocations: 0 / 1.218 GB, free: 12.34 MB / 0.7761 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.002776/1.463, allocations: 199.9 kB / 1.218 GB, free: 12.14 MB / 0.7761 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0004763/1.464, allocations: 48.83 kB / 1.218 GB, free: 12.09 MB / 0.7761 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0002098/1.464, allocations: 23.98 kB / 1.218 GB, free: 12.07 MB / 0.7761 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.002553/1.466, allocations: 1.425 MB / 1.219 GB, free: 10.52 MB / 0.7761 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 5.48e-06/1.467, allocations: 4 kB / 1.219 GB, free: 10.51 MB / 0.7761 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.006902/1.473, allocations: 1.847 MB / 1.221 GB, free: 8.633 MB / 0.7761 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001285/1.475, allocations: 350.6 kB / 1.221 GB, free: 8.27 MB / 0.7761 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0004109/1.475, allocations: 24 kB / 1.221 GB, free: 8.246 MB / 0.7761 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002656/1.478, allocations: 160.8 kB / 1.222 GB, free: 8.09 MB / 0.7761 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002573/1.478, allocations: 60.5 kB / 1.222 GB, free: 8.031 MB / 0.7761 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001198/1.478, allocations: 31.98 kB / 1.222 GB, free: 8 MB / 0.7761 GB Notification: Performance of sorting global known variables: time 0.002642/1.481, allocations: 1.093 MB / 1.223 GB, free: 6.883 MB / 0.7761 GB Notification: Performance of sort global known variables: time 7.52e-07/1.481, allocations: 0 / 1.223 GB, free: 6.883 MB / 0.7761 GB Notification: Performance of remove unused functions: time 0.004773/1.486, allocations: 1.009 MB / 1.224 GB, free: 5.871 MB / 0.7761 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * Number of states: 8 (vol.dynBal.U,vol.dynBal.m,vol.dynBal.mXi[1],mov.filter.x[1],mov.filter.x[2],conPI.I.y,THeaOut.T,hea.outCon.T) * Number of discrete variables: 3 ($whenCondition1,TSet.T_start,TSet.count) * Number of discrete states: 1 (TSet.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (84): * Single equations (assignments): 81 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 1 {(1,100.0%) 2} * Non-linear torn systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.002415/1.488, allocations: 0.6908 MB / 1.224 GB, free: 5.297 MB / 0.7761 GB Notification: Performance of simCode: created initialization part: time 0.007272/1.496, allocations: 1.937 MB / 1.226 GB, free: 3.324 MB / 0.7761 GB Notification: Performance of simCode: created event and clocks part: time 9.187e-06/1.496, allocations: 1.438 kB / 1.226 GB, free: 3.324 MB / 0.7761 GB Notification: Performance of simCode: created simulation system equations: time 0.002471/1.498, allocations: 0.6312 MB / 1.227 GB, free: 2.68 MB / 0.7761 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.007126/1.505, allocations: 0.8159 MB / 1.228 GB, free: 1.859 MB / 0.7761 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01396/1.519, allocations: 4.479 MB / 1.232 GB, free: 13.33 MB / 0.7917 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001607/1.521, allocations: 1.507 MB / 1.234 GB, free: 11.79 MB / 0.7917 GB Notification: Performance of simCode: alias equations: time 0.003322/1.524, allocations: 446.8 kB / 1.234 GB, free: 11.35 MB / 0.7917 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000761/1.525, allocations: 135.4 kB / 1.234 GB, free: 11.21 MB / 0.7917 GB Notification: Performance of SimCode: time 1.162e-06/1.525, allocations: 0 / 1.234 GB, free: 11.21 MB / 0.7917 GB Notification: Performance of Templates: time 0.09212/1.617, allocations: 31.72 MB / 1.265 GB, free: 11.86 MB / 0.823 GB make -j1 -f Buildings_7.0.0_Buildings.Fluid.HeatExchangers.Examples.AirHeater_T.makefile (rm -f Buildings_7.0.0_Buildings.Fluid.HeatExchangers.Examples.AirHeater_T.pipe ; mkfifo Buildings_7.0.0_Buildings.Fluid.HeatExchangers.Examples.AirHeater_T.pipe ; head -c 1048576 < Buildings_7.0.0_Buildings.Fluid.HeatExchangers.Examples.AirHeater_T.pipe >> ../files/Buildings_7.0.0_Buildings.Fluid.HeatExchangers.Examples.AirHeater_T.sim & ./Buildings_7.0.0_Buildings.Fluid.HeatExchangers.Examples.AirHeater_T -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_7.0.0_Buildings.Fluid.HeatExchangers.Examples.AirHeater_T.pipe 2>&1)