Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.RoomWithoutLatentGain.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/package.mo", uses=false) Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/package.mo) Using package Modelica with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo) Using package Complex with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Running command: translateModel(IDEAS.ThermalZones.ReducedOrder.Validation.RoomWithoutLatentGain,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.RoomWithoutLatentGain") translateModel(IDEAS.ThermalZones.ReducedOrder.Validation.RoomWithoutLatentGain,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.RoomWithoutLatentGain") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001305/0.001305, allocations: 111.3 kB / 15.23 MB, free: 0.6602 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001524/0.001524, allocations: 193.3 kB / 16.14 MB, free: 6.66 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.486/1.486, allocations: 222.9 MB / 239.8 MB, free: 4.586 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/package.mo): time 0.776/0.776, allocations: 132.2 MB / 422.2 MB, free: 2.02 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001292/0.001292, allocations: 59.81 kB / 0.5011 GB, free: 4.344 MB / 366.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.39/0.3913, allocations: 80.2 MB / 0.5794 GB, free: 4.539 MB / 430.1 MB Notification: Performance of NFInst.instantiate(IDEAS.ThermalZones.ReducedOrder.Validation.RoomWithoutLatentGain): time 0.2378/0.6291, allocations: 199.9 MB / 0.7746 GB, free: 9.199 MB / 0.6075 GB Notification: Performance of NFInst.instExpressions: time 0.01726/0.6464, allocations: 10.23 MB / 0.7846 GB, free: 14.94 MB / 0.6231 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002696/0.6492, allocations: 67.56 kB / 0.7847 GB, free: 14.88 MB / 0.6231 GB Notification: Performance of NFTyping.typeComponents: time 0.00392/0.6532, allocations: 2.619 MB / 0.7872 GB, free: 12.25 MB / 0.6231 GB Notification: Performance of NFTyping.typeBindings: time 0.006331/0.6595, allocations: 2.632 MB / 0.7898 GB, free: 9.605 MB / 0.6231 GB Notification: Performance of NFTyping.typeClassSections: time 0.004375/0.6639, allocations: 1.306 MB / 0.7911 GB, free: 8.312 MB / 0.6231 GB Notification: Performance of NFFlatten.flatten: time 0.007639/0.6716, allocations: 4.882 MB / 0.7958 GB, free: 3.422 MB / 0.6231 GB Notification: Performance of NFFlatten.resolveConnections: time 0.004081/0.6757, allocations: 1.889 MB / 0.7977 GB, free: 1.477 MB / 0.6231 GB Notification: Performance of NFEvalConstants.evaluate: time 0.004356/0.6801, allocations: 1.495 MB / 0.7991 GB, free: 15.98 MB / 0.6387 GB Notification: Performance of NFSimplifyModel.simplify: time 0.004258/0.6844, allocations: 2.337 MB / 0.8014 GB, free: 13.64 MB / 0.6387 GB Notification: Performance of NFPackage.collectConstants: time 0.0006136/0.685, allocations: 96 kB / 0.8015 GB, free: 13.55 MB / 0.6387 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003852/0.6889, allocations: 1.613 MB / 0.8031 GB, free: 11.93 MB / 0.6387 GB Notification: Performance of NFScalarize.scalarize: time 0.001221/0.6901, allocations: 0.8392 MB / 0.8039 GB, free: 11.09 MB / 0.6387 GB Notification: Performance of NFVerifyModel.verify: time 0.002201/0.6923, allocations: 1.191 MB / 0.8051 GB, free: 9.887 MB / 0.6387 GB Notification: Performance of NFConvertDAE.convert: time 0.005473/0.6978, allocations: 3.707 MB / 0.8087 GB, free: 6.168 MB / 0.6387 GB Notification: Performance of FrontEnd - DAE generated: time 8.215e-06/0.6979, allocations: 0 / 0.8087 GB, free: 6.168 MB / 0.6387 GB Notification: Performance of FrontEnd: time 1.252e-06/0.6979, allocations: 3.938 kB / 0.8087 GB, free: 6.164 MB / 0.6387 GB Notification: Performance of Transformations before backend: time 5.791e-05/0.6979, allocations: 0 / 0.8087 GB, free: 6.164 MB / 0.6387 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 315 * Number of variables: 315 Notification: Performance of Generate backend data structure: time 0.005403/0.7033, allocations: 3.296 MB / 0.8119 GB, free: 2.805 MB / 0.6387 GB Notification: Performance of prepare preOptimizeDAE: time 4.839e-05/0.7034, allocations: 8.031 kB / 0.8119 GB, free: 2.797 MB / 0.6387 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001759/0.7052, allocations: 459.7 kB / 0.8124 GB, free: 2.344 MB / 0.6387 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002298/0.7075, allocations: 1.561 MB / 0.8139 GB, free: 0.7188 MB / 0.6387 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001703/0.7077, allocations: 136.1 kB / 0.814 GB, free: 0.5781 MB / 0.6387 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001906/0.7079, allocations: 128 kB / 0.8141 GB, free: 464 kB / 0.6387 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.3055/1.013, allocations: 1.514 MB / 0.8156 GB, free: 219.8 MB / 0.6387 GB Notification: Performance of preOpt findStateOrder (simulation): time 4.01e-05/1.013, allocations: 3.062 kB / 0.8156 GB, free: 219.8 MB / 0.6387 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001255/1.014, allocations: 52.53 kB / 0.8157 GB, free: 219.8 MB / 0.6387 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 6.678e-05/1.014, allocations: 47.69 kB / 0.8157 GB, free: 219.8 MB / 0.6387 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002643/1.016, allocations: 1.255 MB / 0.8169 GB, free: 219.3 MB / 0.6387 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 0.01011/1.026, allocations: 6.525 MB / 0.8233 GB, free: 215.4 MB / 0.6387 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002467/1.029, allocations: 1.183 MB / 0.8245 GB, free: 214.9 MB / 0.6387 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001281/1.03, allocations: 0.6724 MB / 0.8251 GB, free: 214.7 MB / 0.6387 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0003967/1.031, allocations: 303.6 kB / 0.8254 GB, free: 214.4 MB / 0.6387 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001362/1.032, allocations: 0.6698 MB / 0.8261 GB, free: 214.1 MB / 0.6387 GB Notification: Performance of pre-optimization done (n=113): time 4.659e-06/1.032, allocations: 1.062 kB / 0.8261 GB, free: 214.1 MB / 0.6387 GB Notification: Performance of matching and sorting (n=113): time 0.005576/1.038, allocations: 2.362 MB / 0.8284 GB, free: 213.2 MB / 0.6387 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.625e-05/1.038, allocations: 67.5 kB / 0.8284 GB, free: 213.2 MB / 0.6387 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.00465/1.042, allocations: 4.044 MB / 0.8324 GB, free: 211.7 MB / 0.6387 GB Notification: Performance of collectPreVariables (initialization): time 0.000142/1.043, allocations: 49.42 kB / 0.8324 GB, free: 211.6 MB / 0.6387 GB Notification: Performance of collectInitialEqns (initialization): time 0.0008785/1.043, allocations: 1.287 MB / 0.8337 GB, free: 210.5 MB / 0.6387 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002988/1.044, allocations: 385.2 kB / 0.8341 GB, free: 210.2 MB / 0.6387 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003202/1.044, allocations: 206 kB / 0.8343 GB, free: 210.1 MB / 0.6387 GB Notification: Performance of setup shared object (initialization): time 8.825e-05/1.044, allocations: 354.9 kB / 0.8346 GB, free: 209.8 MB / 0.6387 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0009305/1.045, allocations: 0.4919 MB / 0.8351 GB, free: 209.5 MB / 0.6387 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001017/1.046, allocations: 0.7493 MB / 0.8358 GB, free: 209 MB / 0.6387 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001851/1.048, allocations: 1.255 MB / 0.837 GB, free: 208.2 MB / 0.6387 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 7.764e-06/1.048, allocations: 4.781 kB / 0.837 GB, free: 208.2 MB / 0.6387 GB Notification: Performance of matching and sorting (n=156) (initialization): time 0.003244/1.051, allocations: 1.763 MB / 0.8388 GB, free: 207.3 MB / 0.6387 GB Notification: Performance of prepare postOptimizeDAE: time 2.646e-05/1.051, allocations: 9.438 kB / 0.8388 GB, free: 207.3 MB / 0.6387 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.49e-05/1.051, allocations: 6.938 kB / 0.8388 GB, free: 207.3 MB / 0.6387 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.000623/1.052, allocations: 219.6 kB / 0.839 GB, free: 207.2 MB / 0.6387 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0009081/1.053, allocations: 244.3 kB / 0.8392 GB, free: 207.2 MB / 0.6387 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003695/1.057, allocations: 4.201 MB / 0.8433 GB, free: 203.4 MB / 0.6387 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001367/1.058, allocations: 183.1 kB / 0.8435 GB, free: 203.3 MB / 0.6387 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 9.676e-05/1.058, allocations: 52.83 kB / 0.8435 GB, free: 203.3 MB / 0.6387 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 27 * Number of states: 0 () * Number of discrete variables: 35 (assEqu.nFai,$PRE.assEqu.nFai,$whenCondition8,$PRE.intGai.nextTimeEvent,$whenCondition7,$PRE.reference.nextTimeEvent,$whenCondition6,$PRE.outdoorTemp.nextTimeEvent,$whenCondition5,$PRE.tableSolRadWindow.nextTimeEvent,$whenCondition4,$PRE.ventRate.nextTimeEvent,$whenCondition3,$whenCondition1,mean.y_last,$PRE.mean.y_last,assEqu.satisfied,$PRE.assEqu.satisfied,reference.nextTimeEventScaled,$PRE.reference.nextTimeEventScaled,reference.nextTimeEvent,$whenCondition2,ventRate.nextTimeEventScaled,$PRE.ventRate.nextTimeEventScaled,ventRate.nextTimeEvent,greaterThreshold1.y,tableSolRadWindow.nextTimeEventScaled,$PRE.tableSolRadWindow.nextTimeEventScaled,tableSolRadWindow.nextTimeEvent,outdoorTemp.nextTimeEventScaled,$PRE.outdoorTemp.nextTimeEventScaled,outdoorTemp.nextTimeEvent,intGai.nextTimeEventScaled,$PRE.intGai.nextTimeEventScaled,intGai.nextTimeEvent) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (138): * Single equations (assignments): 136 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 2 systems {(2,14,100.0%), (1,3,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.00124/1.059, allocations: 0.8062 MB / 0.8443 GB, free: 202.9 MB / 0.6387 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0003647/1.06, allocations: 279.1 kB / 0.8446 GB, free: 202.7 MB / 0.6387 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002534/1.062, allocations: 1.638 MB / 0.8462 GB, free: 201.8 MB / 0.6387 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.883e-06/1.062, allocations: 15.27 kB / 0.8462 GB, free: 201.8 MB / 0.6387 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.332e-06/1.062, allocations: 3.906 kB / 0.8462 GB, free: 201.8 MB / 0.6387 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001876/1.064, allocations: 1.432 MB / 0.8476 GB, free: 201 MB / 0.6387 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.004802/1.069, allocations: 3.592 MB / 0.8511 GB, free: 198.8 MB / 0.6387 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.41e-06/1.069, allocations: 4.062 kB / 0.8511 GB, free: 198.8 MB / 0.6387 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0007437/1.07, allocations: 169 kB / 0.8513 GB, free: 198.7 MB / 0.6387 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0004407/1.07, allocations: 205.6 kB / 0.8515 GB, free: 198.5 MB / 0.6387 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.319e-05/1.07, allocations: 35.97 kB / 0.8515 GB, free: 198.5 MB / 0.6387 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.003041/1.073, allocations: 4.199 MB / 0.8556 GB, free: 194 MB / 0.6387 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.043e-06/1.073, allocations: 0 / 0.8556 GB, free: 194 MB / 0.6387 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003038/1.076, allocations: 2.37 MB / 0.8579 GB, free: 191.6 MB / 0.6387 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0006334/1.077, allocations: 437.3 kB / 0.8583 GB, free: 191.1 MB / 0.6387 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002063/1.077, allocations: 24 kB / 0.8584 GB, free: 191.1 MB / 0.6387 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0008187/1.078, allocations: 107.8 kB / 0.8585 GB, free: 191 MB / 0.6387 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002047/1.078, allocations: 96.8 kB / 0.8586 GB, free: 190.9 MB / 0.6387 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.361e-05/1.078, allocations: 43.97 kB / 0.8586 GB, free: 190.9 MB / 0.6387 GB Notification: Performance of sorting global known variables: time 0.002448/1.081, allocations: 2.925 MB / 0.8615 GB, free: 188 MB / 0.6387 GB Notification: Performance of sort global known variables: time 2.01e-07/1.081, allocations: 0 / 0.8615 GB, free: 188 MB / 0.6387 GB Notification: Performance of remove unused functions: time 0.001732/1.083, allocations: 0.5211 MB / 0.862 GB, free: 187.4 MB / 0.6387 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 6 * Number of states: 7 (thermalZoneTwoElements.volMoiAir.dynBal.U,thermalZoneTwoElements.volMoiAir.dynBal.m,thermalZoneTwoElements.volMoiAir.dynBal.mXi[1],thermalZoneTwoElements.extWallRC.thermCapExt[1].T,thermalZoneTwoElements.intWallRC.thermCapInt[1].T,assEqu.diff,mean.x) * Number of discrete variables: 22 ($whenCondition8,$whenCondition7,$whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,intGai.nextTimeEvent,intGai.nextTimeEventScaled,reference.nextTimeEvent,reference.nextTimeEventScaled,outdoorTemp.nextTimeEvent,outdoorTemp.nextTimeEventScaled,tableSolRadWindow.nextTimeEvent,tableSolRadWindow.nextTimeEventScaled,greaterThreshold1.y,ventRate.nextTimeEvent,ventRate.nextTimeEventScaled,assEqu.satisfied,assEqu.nFai,mean.y_last) * Number of discrete states: 13 (intGai.nextTimeEvent,reference.nextTimeEvent,outdoorTemp.nextTimeEvent,tableSolRadWindow.nextTimeEvent,ventRate.nextTimeEvent,mean.x,assEqu.satisfied,assEqu.nFai,ventRate.nextTimeEventScaled,tableSolRadWindow.nextTimeEventScaled,outdoorTemp.nextTimeEventScaled,reference.nextTimeEventScaled,intGai.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (95): * Single equations (assignments): 81 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 12 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 2 systems {(2,14,100.0%), (1,3,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.001335/1.084, allocations: 0.604 MB / 0.8626 GB, free: 187.1 MB / 0.6387 GB Notification: Performance of simCode: created initialization part: time 0.002528/1.086, allocations: 1.538 MB / 0.8641 GB, free: 185.6 MB / 0.6387 GB Notification: Performance of simCode: created event and clocks part: time 4.699e-06/1.086, allocations: 0 / 0.8641 GB, free: 185.6 MB / 0.6387 GB Notification: Performance of simCode: created simulation system equations: time 0.001297/1.088, allocations: 0.9237 MB / 0.865 GB, free: 184.6 MB / 0.6387 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002875/1.091, allocations: 0.5594 MB / 0.8655 GB, free: 184.1 MB / 0.6387 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.007599/1.098, allocations: 6.548 MB / 0.8719 GB, free: 177.5 MB / 0.6387 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001187/1.099, allocations: 1.918 MB / 0.8738 GB, free: 175.5 MB / 0.6387 GB Notification: Performance of simCode: alias equations: time 0.001234/1.101, allocations: 326.9 kB / 0.8741 GB, free: 175.2 MB / 0.6387 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002883/1.101, allocations: 111.4 kB / 0.8742 GB, free: 175.1 MB / 0.6387 GB Notification: Performance of SimCode: time 8.21e-07/1.101, allocations: 0 / 0.8742 GB, free: 175.1 MB / 0.6387 GB Notification: Performance of Templates: time 0.03978/1.141, allocations: 24.55 MB / 0.8982 GB, free: 150.9 MB / 0.6387 GB make -j1 -f IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.RoomWithoutLatentGain.makefile (rm -f IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.RoomWithoutLatentGain.pipe ; mkfifo IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.RoomWithoutLatentGain.pipe ; head -c 1048576 < IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.RoomWithoutLatentGain.pipe >> ../files/IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.RoomWithoutLatentGain.sim & ./IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.RoomWithoutLatentGain -abortSlowSimulation -alarm=480 -lv LOG_STATS > IDEAS_IDEAS.ThermalZones.ReducedOrder.Validation.RoomWithoutLatentGain.pipe 2>&1)