Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.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 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo", uses=false) Using package Buildings with version 8.1.4 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+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(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8") translateModel(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001421/0.001421, allocations: 106.5 kB / 16.27 MB, free: 5.984 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001902/0.001902, allocations: 189 kB / 17.2 MB, free: 5.609 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.457/1.457, allocations: 205.1 MB / 223.1 MB, free: 12.29 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.974/1.974, allocations: 292.3 MB / 0.5495 GB, free: 17.55 MB / 462.1 MB Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.00153/0.001531, allocations: 67.89 kB / 0.6722 GB, free: 6.602 MB / 0.545 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2702/0.2717, allocations: 114.6 MB / 0.784 GB, free: 3.93 MB / 0.6544 GB Notification: Performance of NFInst.instantiate(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8): time 0.6869/0.9586, allocations: 157.8 MB / 0.9381 GB, free: 12.75 MB / 0.7325 GB Notification: Performance of NFInst.instExpressions: time 0.0292/0.9879, allocations: 22 MB / 0.9596 GB, free: 6.699 MB / 0.7481 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.003546/0.9915, allocations: 55.69 kB / 0.9597 GB, free: 6.645 MB / 0.7481 GB Notification: Performance of NFTyping.typeComponents: time 0.003109/0.9947, allocations: 2.748 MB / 0.9624 GB, free: 3.891 MB / 0.7481 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/Utilities/Strings.mo:139:3-175:14:writable] Warning: Pure function 'Modelica.Utilities.Strings.isEmpty' contains a call to impure function 'Modelica.Utilities.Strings.Advanced.skipWhiteSpace'. Notification: Performance of NFTyping.typeBindings: time 0.003049/0.9977, allocations: 1.764 MB / 0.9641 GB, free: 2.121 MB / 0.7481 GB Notification: Performance of NFTyping.typeClassSections: time 0.001871/0.9996, allocations: 0.6393 MB / 0.9647 GB, free: 1.488 MB / 0.7481 GB Notification: Performance of NFFlatten.flatten: time 0.003194/1.003, allocations: 2.258 MB / 0.9669 GB, free: 15.23 MB / 0.7637 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001905/1.005, allocations: 1.349 MB / 0.9682 GB, free: 13.91 MB / 0.7637 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001575/1.006, allocations: 1.11 MB / 0.9693 GB, free: 12.79 MB / 0.7637 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002314/1.009, allocations: 1.991 MB / 0.9713 GB, free: 10.8 MB / 0.7637 GB Notification: Performance of NFPackage.collectConstants: time 0.0002246/1.009, allocations: 116 kB / 0.9714 GB, free: 10.69 MB / 0.7637 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0004572/1.009, allocations: 164 kB / 0.9715 GB, free: 10.53 MB / 0.7637 GB Notification: Performance of NFScalarize.scalarize: time 0.0006681/1.01, allocations: 0.7143 MB / 0.9722 GB, free: 9.809 MB / 0.7637 GB Notification: Performance of NFVerifyModel.verify: time 0.0009433/1.011, allocations: 1.001 MB / 0.9732 GB, free: 8.801 MB / 0.7637 GB Notification: Performance of NFConvertDAE.convert: time 0.00231/1.013, allocations: 2.366 MB / 0.9755 GB, free: 6.426 MB / 0.7637 GB Notification: Performance of FrontEnd - DAE generated: time 6.902e-06/1.013, allocations: 0 / 0.9755 GB, free: 6.426 MB / 0.7637 GB Notification: Performance of FrontEnd: time 2.535e-06/1.013, allocations: 0 / 0.9755 GB, free: 6.426 MB / 0.7637 GB Notification: Performance of Transformations before backend: time 2.601e-05/1.013, allocations: 0 / 0.9755 GB, free: 6.426 MB / 0.7637 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 204 * Number of variables: 204 Notification: Performance of Generate backend data structure: time 0.00431/1.018, allocations: 2.939 MB / 0.9784 GB, free: 3.422 MB / 0.7637 GB Notification: Performance of prepare preOptimizeDAE: time 4.925e-05/1.018, allocations: 15.97 kB / 0.9784 GB, free: 3.406 MB / 0.7637 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0003898/1.018, allocations: 305.8 kB / 0.9787 GB, free: 3.105 MB / 0.7637 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001614/1.02, allocations: 1.267 MB / 0.9799 GB, free: 1.777 MB / 0.7637 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001539/1.02, allocations: 103.7 kB / 0.98 GB, free: 1.672 MB / 0.7637 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001333/1.02, allocations: 84 kB / 0.9801 GB, free: 1.59 MB / 0.7637 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001646/1.022, allocations: 0.9655 MB / 0.981 GB, free: 0.6094 MB / 0.7637 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.697e-05/1.022, allocations: 3.906 kB / 0.9811 GB, free: 0.6055 MB / 0.7637 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 8.468e-05/1.022, allocations: 35.98 kB / 0.9811 GB, free: 0.5703 MB / 0.7637 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.819e-05/1.022, allocations: 20 kB / 0.9811 GB, free: 0.5508 MB / 0.7637 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001475/1.023, allocations: 0.8095 MB / 0.9819 GB, free: 15.75 MB / 0.7794 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.006352/1.03, allocations: 4.412 MB / 0.9862 GB, free: 11.05 MB / 0.7794 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001964/1.032, allocations: 0.9392 MB / 0.9871 GB, free: 10.1 MB / 0.7794 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0009705/1.033, allocations: 0.5227 MB / 0.9876 GB, free: 9.578 MB / 0.7794 GB Notification: Performance of preOpt evalFunc (simulation): time 6.125e-05/1.033, allocations: 13 kB / 0.9876 GB, free: 9.562 MB / 0.7794 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0009877/1.034, allocations: 0.5487 MB / 0.9882 GB, free: 9 MB / 0.7794 GB Notification: Performance of pre-optimization done (n=91): time 3.246e-06/1.034, allocations: 0 / 0.9882 GB, free: 9 MB / 0.7794 GB Notification: Performance of matching and sorting (n=91): time 0.004896/1.039, allocations: 2.152 MB / 0.9903 GB, free: 6.801 MB / 0.7794 GB Notification: Performance of inlineWhenForInitialization (initialization): time 6.968e-05/1.039, allocations: 68.41 kB / 0.9903 GB, free: 6.719 MB / 0.7794 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.004999/1.044, allocations: 4.431 MB / 0.9947 GB, free: 2.281 MB / 0.7794 GB Notification: Performance of collectPreVariables (initialization): time 0.000139/1.044, allocations: 49.7 kB / 0.9947 GB, free: 2.227 MB / 0.7794 GB Notification: Performance of collectInitialEqns (initialization): time 0.001131/1.045, allocations: 1.214 MB / 0.9959 GB, free: 1.004 MB / 0.7794 GB Notification: Performance of collectInitialBindings (initialization): time 0.0003114/1.045, allocations: 299.8 kB / 0.9962 GB, free: 0.707 MB / 0.7794 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002715/1.046, allocations: 158.7 kB / 0.9963 GB, free: 0.5469 MB / 0.7794 GB Notification: Performance of setup shared object (initialization): time 0.0001493/1.046, allocations: 349.9 kB / 0.9967 GB, free: 204 kB / 0.7794 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0008522/1.047, allocations: 396 kB / 0.9971 GB, free: 15.82 MB / 0.795 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0009876/1.048, allocations: 0.5478 MB / 0.9976 GB, free: 15.22 MB / 0.795 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001671/1.049, allocations: 0.9211 MB / 0.9985 GB, free: 14.25 MB / 0.795 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 6.021e-06/1.049, allocations: 0 / 0.9985 GB, free: 14.25 MB / 0.795 GB Notification: Performance of matching and sorting (n=118) (initialization): time 0.003169/1.053, allocations: 1.496 MB / 1 GB, free: 12.74 MB / 0.795 GB Notification: Performance of prepare postOptimizeDAE: time 3.057e-05/1.053, allocations: 4 kB / 1 GB, free: 12.73 MB / 0.795 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.914e-05/1.053, allocations: 7.984 kB / 1 GB, free: 12.73 MB / 0.795 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0008102/1.053, allocations: 262.9 kB / 1 GB, free: 12.46 MB / 0.795 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006644/1.054, allocations: 163.8 kB / 1 GB, free: 12.3 MB / 0.795 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.004965/1.059, allocations: 4.754 MB / 1.005 GB, free: 7.281 MB / 0.795 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001076/1.06, allocations: 134.9 kB / 1.005 GB, free: 7.148 MB / 0.795 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.831e-05/1.06, allocations: 32 kB / 1.005 GB, free: 7.117 MB / 0.795 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 15 * Number of states: 0 () * Number of discrete variables: 36 (assEqu.nFai,$PRE.assEqu.nFai,$whenCondition8,$PRE.intGai.nextTimeEvent,$whenCondition7,$PRE.reference.nextTimeEvent,$whenCondition6,$PRE.outdoorTemp1.nextTimeEvent,$whenCondition5,$PRE.tableSolRadWindow.nextTimeEvent,$whenCondition4,$PRE.tableSolRadWall.nextTimeEvent,$whenCondition3,$whenCondition1,mean.y,$PRE.mean.y,assEqu.satisfied,$PRE.assEqu.satisfied,reference.nextTimeEventScaled,$PRE.reference.nextTimeEventScaled,reference.nextTimeEvent,$whenCondition2,tableSolRadWall.nextTimeEventScaled,$PRE.tableSolRadWall.nextTimeEventScaled,tableSolRadWall.nextTimeEvent,greaterThreshold2.y,greaterThreshold1.y,tableSolRadWindow.nextTimeEventScaled,$PRE.tableSolRadWindow.nextTimeEventScaled,tableSolRadWindow.nextTimeEvent,outdoorTemp1.nextTimeEventScaled,$PRE.outdoorTemp1.nextTimeEventScaled,outdoorTemp1.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 (96): * Single equations (assignments): 94 * 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 {(1,3,100.0%), (2,18,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.00112/1.061, allocations: 0.7771 MB / 1.006 GB, free: 6.332 MB / 0.795 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0003187/1.062, allocations: 272.4 kB / 1.006 GB, free: 6.062 MB / 0.795 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0004788/1.062, allocations: 347.1 kB / 1.007 GB, free: 5.719 MB / 0.795 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 7.464e-06/1.062, allocations: 8 kB / 1.007 GB, free: 5.711 MB / 0.795 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.935e-05/1.062, allocations: 4 kB / 1.007 GB, free: 5.707 MB / 0.795 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.099e-05/1.062, allocations: 7.922 kB / 1.007 GB, free: 5.699 MB / 0.795 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.004381/1.067, allocations: 2.967 MB / 1.009 GB, free: 2.668 MB / 0.795 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.921e-06/1.067, allocations: 3.984 kB / 1.009 GB, free: 2.664 MB / 0.795 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004453/1.067, allocations: 99.81 kB / 1.01 GB, free: 2.566 MB / 0.795 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0006425/1.068, allocations: 256 kB / 1.01 GB, free: 2.312 MB / 0.795 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.076e-05/1.068, allocations: 27.98 kB / 1.01 GB, free: 2.285 MB / 0.795 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.004714/1.073, allocations: 4.747 MB / 1.014 GB, free: 13.27 MB / 0.8106 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.563e-06/1.073, allocations: 1.5 kB / 1.014 GB, free: 13.27 MB / 0.8106 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003578/1.076, allocations: 2.03 MB / 1.016 GB, free: 11.21 MB / 0.8106 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0006023/1.077, allocations: 393.3 kB / 1.017 GB, free: 10.8 MB / 0.8106 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001946/1.077, allocations: 23.98 kB / 1.017 GB, free: 10.78 MB / 0.8106 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0005476/1.078, allocations: 51.95 kB / 1.017 GB, free: 10.73 MB / 0.8106 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002058/1.078, allocations: 88.88 kB / 1.017 GB, free: 10.64 MB / 0.8106 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.99e-05/1.078, allocations: 27.98 kB / 1.017 GB, free: 10.61 MB / 0.8106 GB Notification: Performance of sorting global known variables: time 0.003333/1.081, allocations: 3.251 MB / 1.02 GB, free: 7.367 MB / 0.8106 GB Notification: Performance of sort global known variables: time 1.7e-07/1.081, allocations: 0 / 1.02 GB, free: 7.367 MB / 0.8106 GB Notification: Performance of remove unused functions: time 0.001148/1.082, allocations: 355.4 kB / 1.02 GB, free: 7.02 MB / 0.8106 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: 23 ($whenCondition8,$whenCondition7,$whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,intGai.nextTimeEvent,intGai.nextTimeEventScaled,reference.nextTimeEvent,reference.nextTimeEventScaled,outdoorTemp1.nextTimeEvent,outdoorTemp1.nextTimeEventScaled,tableSolRadWindow.nextTimeEvent,tableSolRadWindow.nextTimeEventScaled,greaterThreshold1.y,greaterThreshold2.y,tableSolRadWall.nextTimeEvent,tableSolRadWall.nextTimeEventScaled,assEqu.satisfied,assEqu.nFai,mean.y) * Number of discrete states: 13 (intGai.nextTimeEvent,reference.nextTimeEvent,outdoorTemp1.nextTimeEvent,tableSolRadWindow.nextTimeEvent,tableSolRadWall.nextTimeEvent,mean.x,assEqu.satisfied,assEqu.nFai,tableSolRadWall.nextTimeEventScaled,tableSolRadWindow.nextTimeEventScaled,outdoorTemp1.nextTimeEventScaled,reference.nextTimeEventScaled,intGai.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (69): * Single equations (assignments): 55 * 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 {(2,18,100.0%), (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 0.00126/1.084, allocations: 0.5006 MB / 1.021 GB, free: 6.762 MB / 0.8106 GB Notification: Performance of simCode: created initialization part: time 0.003037/1.087, allocations: 1.474 MB / 1.022 GB, free: 5.266 MB / 0.8106 GB Notification: Performance of simCode: created event and clocks part: time 5.54e-06/1.087, allocations: 0 / 1.022 GB, free: 5.266 MB / 0.8106 GB Notification: Performance of simCode: created simulation system equations: time 0.001241/1.088, allocations: 0.7982 MB / 1.023 GB, free: 4.441 MB / 0.8106 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001619/1.09, allocations: 357.5 kB / 1.024 GB, free: 4.113 MB / 0.8106 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.008034/1.098, allocations: 5.456 MB / 1.029 GB, free: 14.62 MB / 0.8262 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001428/1.099, allocations: 1.792 MB / 1.031 GB, free: 12.8 MB / 0.8262 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003695/1.1, allocations: 91.41 kB / 1.031 GB, free: 12.71 MB / 0.8262 GB Notification: Performance of SimCode: time 1.002e-06/1.1, allocations: 4 kB / 1.031 GB, free: 12.7 MB / 0.8262 GB Notification: Performance of Templates: time 0.06358/1.163, allocations: 41.13 MB / 1.071 GB, free: 3.641 MB / 0.8575 GB make -j1 -f Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.makefile (rm -f Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.pipe ; mkfifo Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.pipe ; head -c 1048576 < Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.pipe >> ../files/Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.sim & ./Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8 -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.pipe 2>&1)