Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildingSystems_BuildingSystems.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5.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/NcDataReader2 2.5.1-master/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo", uses=false) Using package BuildingSystems with version 2.0.0-beta (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo) Using package NcDataReader2 with version 2.5.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/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(BuildingSystems.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5") translateModel(BuildingSystems.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001262/0.001262, allocations: 106.3 kB / 16.4 MB, free: 6.496 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001234/0.001234, allocations: 189.2 kB / 17.34 MB, free: 5.758 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.398/1.398, allocations: 222.9 MB / 241 MB, free: 15.1 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo): time 0.002518/0.002518, allocations: 294.5 kB / 291.5 MB, free: 14.45 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo): time 1.007/1.007, allocations: 169.3 MB / 0.499 GB, free: 4.438 MB / 382.1 MB Notification: Performance of FrontEnd - loaded program: time 0.002673/0.002673, allocations: 99.84 kB / 0.6821 GB, free: 6.977 MB / 494.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3974/0.4, allocations: 86.98 MB / 0.767 GB, free: 3.934 MB / 0.5294 GB Notification: Performance of NFInst.instantiate(BuildingSystems.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5): time 0.186/0.586, allocations: 157.7 MB / 0.921 GB, free: 5.656 MB / 0.6856 GB Notification: Performance of NFInst.instExpressions: time 0.02897/0.615, allocations: 22.05 MB / 0.9425 GB, free: 15.52 MB / 0.7169 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.00171/0.6167, allocations: 55.69 kB / 0.9426 GB, free: 15.46 MB / 0.7169 GB Notification: Performance of NFTyping.typeComponents: time 0.002608/0.6193, allocations: 2.159 MB / 0.9447 GB, free: 13.3 MB / 0.7169 GB Notification: Performance of NFTyping.typeBindings: time 0.002169/0.6215, allocations: 1.437 MB / 0.9461 GB, free: 11.86 MB / 0.7169 GB Notification: Performance of NFTyping.typeClassSections: time 0.001522/0.623, allocations: 0.5748 MB / 0.9467 GB, free: 11.29 MB / 0.7169 GB Notification: Performance of NFFlatten.flatten: time 0.002257/0.6253, allocations: 1.84 MB / 0.9485 GB, free: 9.445 MB / 0.7169 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001188/0.6265, allocations: 0.8961 MB / 0.9493 GB, free: 8.523 MB / 0.7169 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001161/0.6276, allocations: 0.888 MB / 0.9502 GB, free: 7.633 MB / 0.7169 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001776/0.6294, allocations: 1.534 MB / 0.9517 GB, free: 6.098 MB / 0.7169 GB Notification: Performance of NFPackage.collectConstants: time 0.0001754/0.6296, allocations: 92 kB / 0.9518 GB, free: 6.008 MB / 0.7169 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0003212/0.6299, allocations: 144 kB / 0.9519 GB, free: 5.867 MB / 0.7169 GB Notification: Performance of NFScalarize.scalarize: time 0.0004833/0.6304, allocations: 0.5277 MB / 0.9525 GB, free: 5.336 MB / 0.7169 GB Notification: Performance of NFVerifyModel.verify: time 0.0007163/0.6311, allocations: 0.7602 MB / 0.9532 GB, free: 4.57 MB / 0.7169 GB Notification: Performance of NFConvertDAE.convert: time 0.002134/0.6332, allocations: 1.872 MB / 0.955 GB, free: 2.695 MB / 0.7169 GB Notification: Performance of FrontEnd - DAE generated: time 4.228e-06/0.6332, allocations: 0 / 0.955 GB, free: 2.695 MB / 0.7169 GB Notification: Performance of FrontEnd: time 1.543e-06/0.6332, allocations: 0 / 0.955 GB, free: 2.695 MB / 0.7169 GB Notification: Performance of Transformations before backend: time 2.676e-05/0.6333, allocations: 0 / 0.955 GB, free: 2.695 MB / 0.7169 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 153 * Number of variables: 153 Notification: Performance of Generate backend data structure: time 0.003709/0.637, allocations: 2.354 MB / 0.9573 GB, free: 280 kB / 0.7169 GB Notification: Performance of prepare preOptimizeDAE: time 3.665e-05/0.637, allocations: 8.031 kB / 0.9573 GB, free: 272 kB / 0.7169 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0003251/0.6373, allocations: 247.3 kB / 0.9576 GB, free: 24 kB / 0.7169 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.3187/0.956, allocations: 1.032 MB / 0.9586 GB, free: 191.5 MB / 0.7169 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001513/0.9562, allocations: 89.06 kB / 0.9587 GB, free: 191.5 MB / 0.7169 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001386/0.9563, allocations: 68.36 kB / 0.9587 GB, free: 191.5 MB / 0.7169 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001468/0.9578, allocations: 0.7245 MB / 0.9594 GB, free: 191.2 MB / 0.7169 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.296e-05/0.9578, allocations: 1.25 kB / 0.9594 GB, free: 191.2 MB / 0.7169 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 6.377e-05/0.9579, allocations: 22.55 kB / 0.9595 GB, free: 191.2 MB / 0.7169 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.385e-05/0.9579, allocations: 18.53 kB / 0.9595 GB, free: 191.2 MB / 0.7169 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001347/0.9592, allocations: 0.6019 MB / 0.9601 GB, free: 191 MB / 0.7169 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.004662/0.9639, allocations: 3.505 MB / 0.9635 GB, free: 188.8 MB / 0.7169 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001442/0.9653, allocations: 0.6606 MB / 0.9641 GB, free: 188.5 MB / 0.7169 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0007294/0.9661, allocations: 375.7 kB / 0.9645 GB, free: 188.4 MB / 0.7169 GB Notification: Performance of preOpt evalFunc (simulation): time 4.367e-05/0.9661, allocations: 9.203 kB / 0.9645 GB, free: 188.4 MB / 0.7169 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0007607/0.9669, allocations: 441.2 kB / 0.9649 GB, free: 188.2 MB / 0.7169 GB Notification: Performance of pre-optimization done (n=70): time 2.855e-06/0.9669, allocations: 0 / 0.9649 GB, free: 188.2 MB / 0.7169 GB Notification: Performance of matching and sorting (n=70): time 0.004188/0.9711, allocations: 1.796 MB / 0.9667 GB, free: 187.5 MB / 0.7169 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.54e-05/0.9711, allocations: 60.48 kB / 0.9667 GB, free: 187.5 MB / 0.7169 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002803/0.9739, allocations: 3.312 MB / 0.97 GB, free: 186 MB / 0.7169 GB Notification: Performance of collectPreVariables (initialization): time 6.333e-05/0.974, allocations: 45.7 kB / 0.97 GB, free: 186 MB / 0.7169 GB Notification: Performance of collectInitialEqns (initialization): time 0.0004986/0.9745, allocations: 0.8927 MB / 0.9709 GB, free: 185.1 MB / 0.7169 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001297/0.9746, allocations: 235.3 kB / 0.9711 GB, free: 184.9 MB / 0.7169 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001529/0.9747, allocations: 126.7 kB / 0.9712 GB, free: 184.8 MB / 0.7169 GB Notification: Performance of setup shared object (initialization): time 4.878e-05/0.9748, allocations: 345.9 kB / 0.9716 GB, free: 184.4 MB / 0.7169 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005483/0.9753, allocations: 308.9 kB / 0.9718 GB, free: 184.1 MB / 0.7169 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0005935/0.9759, allocations: 435.6 kB / 0.9723 GB, free: 183.7 MB / 0.7169 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001008/0.9769, allocations: 0.7137 MB / 0.973 GB, free: 182.9 MB / 0.7169 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.308e-06/0.9769, allocations: 8 kB / 0.973 GB, free: 182.9 MB / 0.7169 GB Notification: Performance of matching and sorting (n=95) (initialization): time 0.001872/0.9788, allocations: 1.204 MB / 0.9741 GB, free: 181.7 MB / 0.7169 GB Notification: Performance of prepare postOptimizeDAE: time 1.588e-05/0.9788, allocations: 12.09 kB / 0.9742 GB, free: 181.7 MB / 0.7169 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.464e-06/0.9788, allocations: 0 / 0.9742 GB, free: 181.7 MB / 0.7169 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0006111/0.9795, allocations: 257.5 kB / 0.9744 GB, free: 181.4 MB / 0.7169 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004421/0.9799, allocations: 139.8 kB / 0.9745 GB, free: 181.3 MB / 0.7169 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003532/0.9834, allocations: 4.757 MB / 0.9792 GB, free: 176.3 MB / 0.7169 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000603/0.984, allocations: 96.14 kB / 0.9793 GB, free: 176.2 MB / 0.7169 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.256e-05/0.9841, allocations: 28 kB / 0.9793 GB, free: 176.2 MB / 0.7169 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 14 * Number of states: 0 () * Number of discrete variables: 30 (assEqu.nFai,$PRE.assEqu.nFai,$whenCondition7,$PRE.intGai.nextTimeEvent,$whenCondition6,$PRE.reference.nextTimeEvent,$whenCondition5,$PRE.outdoorTemp.nextTimeEvent,$whenCondition4,$PRE.tableSolRadWindow.nextTimeEvent,$whenCondition3,$whenCondition1,mean.y_last,$PRE.mean.y_last,assEqu.satisfied,$PRE.assEqu.satisfied,reference.nextTimeEventScaled,$PRE.reference.nextTimeEventScaled,reference.nextTimeEvent,$whenCondition2,greaterThreshold1.y,tableSolRadWindow.nextTimeEventScaled,$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 (73): * Single equations (assignments): 71 * 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 {(2,18,100.0%), (1,3,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0005778/0.9846, allocations: 0.6107 MB / 0.9799 GB, free: 175.6 MB / 0.7169 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001697/0.9848, allocations: 210.6 kB / 0.9801 GB, free: 175.3 MB / 0.7169 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.000299/0.9851, allocations: 248.5 kB / 0.9803 GB, free: 175.1 MB / 0.7169 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.667e-06/0.9851, allocations: 8 kB / 0.9803 GB, free: 175.1 MB / 0.7169 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.731e-05/0.9851, allocations: 11.94 kB / 0.9804 GB, free: 175.1 MB / 0.7169 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.993e-06/0.9851, allocations: 7.078 kB / 0.9804 GB, free: 175.1 MB / 0.7169 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003129/0.9883, allocations: 2.331 MB / 0.9826 GB, free: 172.7 MB / 0.7169 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.186e-06/0.9883, allocations: 0 / 0.9826 GB, free: 172.7 MB / 0.7169 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002851/0.9886, allocations: 63.91 kB / 0.9827 GB, free: 172.6 MB / 0.7169 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0005278/0.9891, allocations: 262.7 kB / 0.9829 GB, free: 172.4 MB / 0.7169 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.443e-05/0.9891, allocations: 16 kB / 0.983 GB, free: 172.4 MB / 0.7169 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.003469/0.9926, allocations: 4.756 MB / 0.9876 GB, free: 167.3 MB / 0.7169 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.252e-06/0.9926, allocations: 0 / 0.9876 GB, free: 167.3 MB / 0.7169 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002363/0.995, allocations: 1.566 MB / 0.9891 GB, free: 165.8 MB / 0.7169 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005035/0.9955, allocations: 326.6 kB / 0.9894 GB, free: 165.4 MB / 0.7169 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001651/0.9956, allocations: 23.98 kB / 0.9895 GB, free: 165.4 MB / 0.7169 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0004351/0.9961, allocations: 35.97 kB / 0.9895 GB, free: 165.4 MB / 0.7169 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001788/0.9963, allocations: 75.22 kB / 0.9896 GB, free: 165.3 MB / 0.7169 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.98e-05/0.9963, allocations: 27.98 kB / 0.9896 GB, free: 165.3 MB / 0.7169 GB Notification: Performance of sorting global known variables: time 0.00194/0.9982, allocations: 2.419 MB / 0.992 GB, free: 162.8 MB / 0.7169 GB Notification: Performance of sort global known variables: time 1.1e-07/0.9982, allocations: 0 / 0.992 GB, free: 162.8 MB / 0.7169 GB Notification: Performance of remove unused functions: time 0.0009886/0.9992, allocations: 299.5 kB / 0.9922 GB, free: 162.6 MB / 0.7169 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 4 (thermalZoneTwoElements.extWallRC.thermCapExt[1].T,thermalZoneTwoElements.intWallRC.thermCapInt[1].T,assEqu.diff,mean.x) * Number of discrete variables: 19 ($whenCondition7,$whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,intGai.nextTimeEvent,intGai.nextTimeEventScaled,reference.nextTimeEvent,reference.nextTimeEventScaled,outdoorTemp.nextTimeEvent,outdoorTemp.nextTimeEventScaled,tableSolRadWindow.nextTimeEvent,tableSolRadWindow.nextTimeEventScaled,greaterThreshold1.y,assEqu.satisfied,assEqu.nFai,mean.y_last) * Number of discrete states: 11 (intGai.nextTimeEvent,reference.nextTimeEvent,outdoorTemp.nextTimeEvent,tableSolRadWindow.nextTimeEvent,mean.x,assEqu.satisfied,assEqu.nFai,tableSolRadWindow.nextTimeEventScaled,outdoorTemp.nextTimeEventScaled,reference.nextTimeEventScaled,intGai.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (48): * Single equations (assignments): 36 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 10 * 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 {(2,18,100.0%), (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 0.001701/1.001, allocations: 495.3 kB / 0.9927 GB, free: 162.3 MB / 0.7169 GB Notification: Performance of simCode: created initialization part: time 0.001757/1.003, allocations: 1.019 MB / 0.9937 GB, free: 161.2 MB / 0.7169 GB Notification: Performance of simCode: created event and clocks part: time 4.568e-06/1.003, allocations: 4 kB / 0.9937 GB, free: 161.2 MB / 0.7169 GB Notification: Performance of simCode: created simulation system equations: time 0.0009545/1.004, allocations: 0.6669 MB / 0.9944 GB, free: 160.5 MB / 0.7169 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001492/1.005, allocations: 290 kB / 0.9946 GB, free: 160.3 MB / 0.7169 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.004687/1.01, allocations: 4.059 MB / 0.9986 GB, free: 156.2 MB / 0.7169 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007707/1.011, allocations: 1.534 MB / 1 GB, free: 154.6 MB / 0.7169 GB Notification: Performance of simCode: alias equations: time 0.0004757/1.011, allocations: 146.4 kB / 1 GB, free: 154.5 MB / 0.7169 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001492/1.011, allocations: 63.42 kB / 1 GB, free: 154.4 MB / 0.7169 GB Notification: Performance of SimCode: time 1.323e-06/1.011, allocations: 0 / 1 GB, free: 154.4 MB / 0.7169 GB Notification: Performance of Templates: time 0.024/1.035, allocations: 14.7 MB / 1.015 GB, free: 139.9 MB / 0.7169 GB make -j1 -f BuildingSystems_BuildingSystems.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5.makefile (rm -f BuildingSystems_BuildingSystems.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5.pipe ; mkfifo BuildingSystems_BuildingSystems.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5.pipe >> ../files/BuildingSystems_BuildingSystems.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5.sim & ./BuildingSystems_BuildingSystems.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5 -abortSlowSimulation -alarm=480 -s cvode -lv LOG_STATS > BuildingSystems_BuildingSystems.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5.pipe 2>&1)