Running: ./testmodel.py --libraries=/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase1.conf.json
loadFile("/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 8.0.0/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 8.0.0 (/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo)
Running command: translateModel(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase1,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase1")
translateModel(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase1,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase1")
Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo): time 1.698/1.698, allocations: 291.7 MB / 306.8 MB, free: 7.668 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 0.000981/0.000981, allocations: 180.9 kB / 375.4 MB, free: 5.074 MB / 298.7 MB
Notification: Performance of loadFile(/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/converted-libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.324/1.324, allocations: 225.7 MB / 0.6538 GB, free: 13.62 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 0.0008811/0.000881, allocations: 101.7 kB / 0.7699 GB, free: 50.26 MB / 0.5417 GB
Notification: Performance of FrontEnd - loaded program: time 0.0004943/0.0004947, allocations: 12 kB / 0.8956 GB, free: 11.88 MB / 0.6198 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.6837/0.6842, allocations: 118.1 MB / 1.011 GB, free: 57.75 MB / 0.7136 GB
Notification: Performance of NFInst.instantiate(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase1): time 0.1331/0.8173, allocations: 142.1 MB / 1.15 GB, free: 11.23 MB / 0.7605 GB
Notification: Performance of NFInst.instExpressions: time 0.02237/0.8398, allocations: 20.15 MB / 1.169 GB, free: 12.58 MB / 0.7761 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.001439/0.8413, allocations: 49.38 kB / 1.169 GB, free: 12.56 MB / 0.7761 GB
Notification: Performance of NFTyping.typeComponents: time 0.001332/0.8426, allocations: 1.098 MB / 1.171 GB, free: 12.4 MB / 0.7761 GB
Notification: Performance of NFTyping.typeBindings: time 0.001239/0.8439, allocations: 0.7795 MB / 1.171 GB, free: 12.17 MB / 0.7761 GB
Notification: Performance of NFTyping.typeClassSections: time 0.0009414/0.8448, allocations: 323.9 kB / 1.172 GB, free: 12.01 MB / 0.7761 GB
Notification: Performance of NFFlatten.flatten: time 0.001193/0.846, allocations: 1.185 MB / 1.173 GB, free: 11.52 MB / 0.7761 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.0006579/0.8467, allocations: 0.5766 MB / 1.173 GB, free: 11.35 MB / 0.7761 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.0005183/0.8472, allocations: 467.2 kB / 1.174 GB, free: 11.22 MB / 0.7761 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.0008136/0.848, allocations: 0.7701 MB / 1.174 GB, free: 11.04 MB / 0.7761 GB
Notification: Performance of NFPackage.collectConstants: time 7.705e-05/0.8481, allocations: 25.84 kB / 1.175 GB, free: 11.04 MB / 0.7761 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.0002031/0.8483, allocations: 63.5 kB / 1.175 GB, free: 11.04 MB / 0.7761 GB
Notification: Performance of NFScalarize.scalarize: time 0.0002377/0.8486, allocations: 287.2 kB / 1.175 GB, free: 10.94 MB / 0.7761 GB
Notification: Performance of NFVerifyModel.verify: time 0.0001708/0.8488, allocations: 207.9 kB / 1.175 GB, free: 10.8 MB / 0.7761 GB
Notification: Performance of NFConvertDAE.convert: time 0.0007296/0.8495, allocations: 0.8836 MB / 1.176 GB, free: 10.59 MB / 0.7761 GB
Notification: Performance of FrontEnd - DAE generated: time 4.529e-06/0.8495, allocations: 4 kB / 1.176 GB, free: 10.58 MB / 0.7761 GB
Notification: Performance of FrontEnd: time 1.673e-06/0.8495, allocations: 0 / 1.176 GB, free: 10.58 MB / 0.7761 GB
Notification: Performance of Transformations before backend: time 1.282e-05/0.8495, allocations: 1.375 kB / 1.176 GB, free: 10.58 MB / 0.7761 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 106
 * Number of variables: 106
Notification: Performance of Generate backend data structure: time 0.001824/0.8514, allocations: 1.281 MB / 1.177 GB, free: 9.684 MB / 0.7761 GB
Notification: Performance of prepare preOptimizeDAE: time 3.349e-05/0.8514, allocations: 13 kB / 1.177 GB, free: 9.68 MB / 0.7761 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001568/0.8516, allocations: 130.1 kB / 1.177 GB, free: 9.613 MB / 0.7761 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.0007763/0.8524, allocations: 0.6517 MB / 1.178 GB, free: 9.129 MB / 0.7761 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001312/0.8525, allocations: 78.16 kB / 1.178 GB, free: 9.082 MB / 0.7761 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 8.3e-05/0.8526, allocations: 47.47 kB / 1.178 GB, free: 9.066 MB / 0.7761 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.0009474/0.8535, allocations: 0.5249 MB / 1.179 GB, free: 8.84 MB / 0.7761 GB
Notification: Performance of preOpt findStateOrder (simulation): time 2.008e-05/0.8536, allocations: 0 / 1.179 GB, free: 8.84 MB / 0.7761 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.506e-05/0.8536, allocations: 16.28 kB / 1.179 GB, free: 8.828 MB / 0.7761 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.124e-05/0.8536, allocations: 10.09 kB / 1.179 GB, free: 8.828 MB / 0.7761 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0008573/0.8545, allocations: 427.9 kB / 1.179 GB, free: 8.695 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 preOpt removeSimpleEquations (simulation): time 0.003047/0.8576, allocations: 2.662 MB / 1.182 GB, free: 6.742 MB / 0.7761 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0009943/0.8586, allocations: 489.4 kB / 1.182 GB, free: 6.559 MB / 0.7761 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0006328/0.8592, allocations: 314.2 kB / 1.182 GB, free: 6.465 MB / 0.7761 GB
Notification: Performance of preOpt evalFunc (simulation): time 3.609e-05/0.8593, allocations: 5.312 kB / 1.182 GB, free: 6.465 MB / 0.7761 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0005269/0.8598, allocations: 287.1 kB / 1.183 GB, free: 6.344 MB / 0.7761 GB
Notification: Performance of pre-optimization done (n=42): time 3.817e-06/0.8598, allocations: 0 / 1.183 GB, free: 6.344 MB / 0.7761 GB
Notification: Performance of matching and sorting (n=42): time 0.002587/0.8624, allocations: 1.164 MB / 1.184 GB, free: 5.809 MB / 0.7761 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 4.728e-05/0.8625, allocations: 59.36 kB / 1.184 GB, free: 5.746 MB / 0.7761 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001877/0.8643, allocations: 1.766 MB / 1.186 GB, free: 5.164 MB / 0.7761 GB
Notification: Performance of collectPreVariables (initialization): time 3.661e-05/0.8644, allocations: 37.58 kB / 1.186 GB, free: 5.125 MB / 0.7761 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0004079/0.8648, allocations: 0.5243 MB / 1.186 GB, free: 4.715 MB / 0.7761 GB
Notification: Performance of collectInitialBindings (initialization): time 0.0001132/0.8649, allocations: 135.1 kB / 1.186 GB, free: 4.609 MB / 0.7761 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 2.258e-05/0.865, allocations: 9.406 kB / 1.186 GB, free: 4.602 MB / 0.7761 GB
Notification: Performance of setup shared object (initialization): time 0.0001062/0.8651, allocations: 326.5 kB / 1.187 GB, free: 4.289 MB / 0.7761 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003903/0.8655, allocations: 190.7 kB / 1.187 GB, free: 4.23 MB / 0.7761 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004562/0.8659, allocations: 323.4 kB / 1.187 GB, free: 4.02 MB / 0.7761 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0008193/0.8668, allocations: 0.5004 MB / 1.188 GB, free: 3.727 MB / 0.7761 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.238e-06/0.8668, allocations: 1.031 kB / 1.188 GB, free: 3.727 MB / 0.7761 GB
Notification: Performance of matching and sorting (n=66) (initialization): time 0.001373/0.8682, allocations: 0.7546 MB / 1.188 GB, free: 3.41 MB / 0.7761 GB
Notification: Performance of prepare postOptimizeDAE: time 2.047e-05/0.8682, allocations: 7.062 kB / 1.188 GB, free: 3.41 MB / 0.7761 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.09e-05/0.8682, allocations: 8 kB / 1.188 GB, free: 3.406 MB / 0.7761 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.0004029/0.8686, allocations: 144.5 kB / 1.188 GB, free: 3.355 MB / 0.7761 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003253/0.8689, allocations: 92.69 kB / 1.189 GB, free: 3.348 MB / 0.7761 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002672/0.8716, allocations: 2.383 MB / 1.191 GB, free: 1.461 MB / 0.7761 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004296/0.8721, allocations: 81.64 kB / 1.191 GB, free: 1.426 MB / 0.7761 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.877e-05/0.8721, allocations: 23.97 kB / 1.191 GB, free: 1.418 MB / 0.7761 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 16
 * Number of states: 0 ()
 * Number of discrete variables: 19 ($PRE.assEqu.nFai,assEqu.nFai,$whenCondition5,$whenCondition4,$PRE.intGai.nextTimeEvent,$whenCondition3,$PRE.reference.nextTimeEvent,$whenCondition1,$whenCondition2,reference.nextTimeEvent,$PRE.reference.nextTimeEventScaled,reference.nextTimeEventScaled,$PRE.assEqu.satisfied,assEqu.satisfied,$PRE.mean.y_last,mean.y_last,intGai.nextTimeEvent,$PRE.intGai.nextTimeEventScaled,intGai.nextTimeEventScaled)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (51):
 * Single equations (assignments): 50
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * 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%) 15}
 * Non-linear torn systems: 0
Notification: Performance of prepare postOptimizeDAE: time 0.0004857/0.8726, allocations: 389.5 kB / 1.191 GB, free: 1.219 MB / 0.7761 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001204/0.8727, allocations: 115.7 kB / 1.191 GB, free: 1.156 MB / 0.7761 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0002121/0.873, allocations: 138.2 kB / 1.192 GB, free: 1.09 MB / 0.7761 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.579e-06/0.873, allocations: 4.219 kB / 1.192 GB, free: 1.09 MB / 0.7761 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 1.211e-05/0.873, allocations: 2.219 kB / 1.192 GB, free: 1.09 MB / 0.7761 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.408e-06/0.873, allocations: 5.156 kB / 1.192 GB, free: 1.086 MB / 0.7761 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002063/0.8751, allocations: 1.395 MB / 1.193 GB, free: 404 kB / 0.7761 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.757e-06/0.8751, allocations: 1.938 kB / 1.193 GB, free: 404 kB / 0.7761 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002186/0.8753, allocations: 55.33 kB / 1.193 GB, free: 392 kB / 0.7761 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.0003796/0.8757, allocations: 159.7 kB / 1.193 GB, free: 340 kB / 0.7761 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.109e-05/0.8757, allocations: 8.5 kB / 1.193 GB, free: 336 kB / 0.7761 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.003222/0.879, allocations: 3.703 MB / 1.197 GB, free: 13.13 MB / 0.7917 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.283e-06/0.879, allocations: 0 / 1.197 GB, free: 13.13 MB / 0.7917 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001701/0.8807, allocations: 0.998 MB / 1.198 GB, free: 12.65 MB / 0.7917 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.0002745/0.881, allocations: 220.8 kB / 1.198 GB, free: 12.47 MB / 0.7917 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 9.225e-05/0.8811, allocations: 11.34 kB / 1.198 GB, free: 12.46 MB / 0.7917 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.000329/0.8814, allocations: 42.89 kB / 1.198 GB, free: 12.45 MB / 0.7917 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001326/0.8816, allocations: 58.42 kB / 1.198 GB, free: 12.44 MB / 0.7917 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.93e-05/0.8816, allocations: 17.55 kB / 1.198 GB, free: 12.44 MB / 0.7917 GB
Notification: Performance of sorting global known variables: time 0.001472/0.8831, allocations: 1.286 MB / 1.199 GB, free: 12 MB / 0.7917 GB
Notification: Performance of sort global known variables: time 2.5e-07/0.8831, allocations: 1.094 kB / 1.199 GB, free: 12 MB / 0.7917 GB
Notification: Performance of remove unused functions: time 0.0007566/0.8839, allocations: 192.3 kB / 1.2 GB, free: 11.97 MB / 0.7917 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 1
 * Number of states: 3 (thermalZoneTwoElements.extWallRC.thermCapExt[1].T,thermalZoneTwoElements.intWallRC.thermCapInt[1].T,mean.x)
 * Number of discrete variables: 12 ($whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,intGai.nextTimeEvent,intGai.nextTimeEventScaled,reference.nextTimeEvent,reference.nextTimeEventScaled,assEqu.satisfied,assEqu.nFai,mean.y_last)
 * Number of discrete states: 7 (intGai.nextTimeEvent,reference.nextTimeEvent,mean.x,reference.nextTimeEventScaled,assEqu.satisfied,assEqu.nFai,intGai.nextTimeEventScaled)
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for simulation (26):
 * Single equations (assignments): 18
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 6
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 0
 * Torn equation systems: 2
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 2 {(2,100.0%) 12,(1,100.0%) 3}
 * Non-linear torn systems: 0
Notification: Performance of Backend phase and start with SimCode phase: time 0.001107/0.885, allocations: 0.5527 MB / 1.2 GB, free: 11.74 MB / 0.7917 GB
Notification: Performance of simCode: created initialization part: time 0.001256/0.8862, allocations: 0.6499 MB / 1.201 GB, free: 11.44 MB / 0.7917 GB
Notification: Performance of simCode: created event and clocks part: time 3.537e-06/0.8863, allocations: 1.781 kB / 1.201 GB, free: 11.44 MB / 0.7917 GB
Notification: Performance of simCode: created simulation system equations: time 0.0007833/0.8871, allocations: 0.5257 MB / 1.201 GB, free: 11.11 MB / 0.7917 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0009545/0.888, allocations: 181.6 kB / 1.201 GB, free: 11.05 MB / 0.7917 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003446/0.8915, allocations: 2.614 MB / 1.204 GB, free: 9.824 MB / 0.7917 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007079/0.8922, allocations: 1.143 MB / 1.205 GB, free: 9.078 MB / 0.7917 GB
Notification: Performance of simCode: alias equations: time 0.0003005/0.8925, allocations: 95.81 kB / 1.205 GB, free: 9.062 MB / 0.7917 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001033/0.8926, allocations: 46.03 kB / 1.205 GB, free: 9.051 MB / 0.7917 GB
Notification: Performance of SimCode: time 3.61e-07/0.8926, allocations: 0 / 1.205 GB, free: 9.051 MB / 0.7917 GB
Notification: Performance of Templates: time 0.01773/0.9104, allocations: 8.747 MB / 1.214 GB, free: 8.234 MB / 0.7917 GB
make -j1 -f Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase1.makefile
(rm -f Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase1.pipe ; mkfifo Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase1.pipe ; head -c 1048576 < Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase1.pipe >> ../files/Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase1.sim & ./Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase1 -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase1.pipe 2>&1)