Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_8_Buildings.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 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.TestCase5,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5") translateModel(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_8_Buildings.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 0.001095/0.001095, allocations: 108 kB / 15.6 MB, free: 132 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.00107/0.00107, allocations: 194 kB / 16.53 MB, free: 6.391 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.082/1.082, allocations: 205.1 MB / 222.4 MB, free: 4.59 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.446/1.446, allocations: 292.3 MB / 0.5489 GB, free: 12.86 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 0.001252/0.001252, allocations: 75.42 kB / 0.6715 GB, free: 26.14 MB / 0.5294 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1605/0.1617, allocations: 114.5 MB / 0.7834 GB, free: 13.51 MB / 0.6075 GB Notification: Performance of NFInst.instantiate(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5): time 0.4325/0.5943, allocations: 157.2 MB / 0.9369 GB, free: 4.828 MB / 0.7169 GB Notification: Performance of NFInst.instExpressions: time 0.01791/0.6123, allocations: 21.81 MB / 0.9582 GB, free: 4.395 MB / 0.7169 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001446/0.6138, allocations: 54.28 kB / 0.9583 GB, free: 4.395 MB / 0.7169 GB Notification: Performance of NFTyping.typeComponents: time 0.00186/0.6156, allocations: 2.15 MB / 0.9604 GB, free: 4.324 MB / 0.7169 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 0.001395/0.617, allocations: 1.419 MB / 0.9617 GB, free: 4.273 MB / 0.7169 GB Notification: Performance of NFTyping.typeClassSections: time 0.0009279/0.618, allocations: 0.5291 MB / 0.9623 GB, free: 4.266 MB / 0.7169 GB Notification: Performance of NFFlatten.flatten: time 0.001234/0.6192, allocations: 1.812 MB / 0.964 GB, free: 4.117 MB / 0.7169 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0009153/0.6201, allocations: 1.084 MB / 0.9651 GB, free: 3.984 MB / 0.7169 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0007438/0.6209, allocations: 0.8787 MB / 0.9659 GB, free: 3.957 MB / 0.7169 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001158/0.6221, allocations: 1.532 MB / 0.9674 GB, free: 3.867 MB / 0.7169 GB Notification: Performance of NFPackage.collectConstants: time 0.0001465/0.6222, allocations: 94.84 kB / 0.9675 GB, free: 3.863 MB / 0.7169 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0002739/0.6225, allocations: 139.8 kB / 0.9677 GB, free: 3.855 MB / 0.7169 GB Notification: Performance of NFScalarize.scalarize: time 0.0003289/0.6228, allocations: 0.5159 MB / 0.9682 GB, free: 3.762 MB / 0.7169 GB Notification: Performance of NFVerifyModel.verify: time 0.0004801/0.6233, allocations: 0.7631 MB / 0.9689 GB, free: 3.426 MB / 0.7169 GB Notification: Performance of NFConvertDAE.convert: time 0.001111/0.6244, allocations: 1.821 MB / 0.9707 GB, free: 3.039 MB / 0.7169 GB Notification: Performance of FrontEnd - DAE generated: time 3.186e-06/0.6245, allocations: 0 / 0.9707 GB, free: 3.039 MB / 0.7169 GB Notification: Performance of FrontEnd: time 1.312e-06/0.6245, allocations: 0 / 0.9707 GB, free: 3.039 MB / 0.7169 GB Notification: Performance of Transformations before backend: time 1.591e-05/0.6245, allocations: 1.062 kB / 0.9707 GB, free: 3.039 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: 152 * Number of variables: 152 Notification: Performance of Generate backend data structure: time 0.002483/0.627, allocations: 2.276 MB / 0.9729 GB, free: 17.73 MB / 0.7325 GB Notification: Performance of prepare preOptimizeDAE: time 2.629e-05/0.627, allocations: 11.5 kB / 0.9729 GB, free: 17.73 MB / 0.7325 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001936/0.6272, allocations: 228.3 kB / 0.9731 GB, free: 17.61 MB / 0.7325 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0008544/0.6281, allocations: 0.9986 MB / 0.9741 GB, free: 16.96 MB / 0.7325 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001054/0.6282, allocations: 87.75 kB / 0.9742 GB, free: 16.91 MB / 0.7325 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.169e-05/0.6283, allocations: 67.83 kB / 0.9743 GB, free: 16.88 MB / 0.7325 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0009902/0.6293, allocations: 0.7249 MB / 0.975 GB, free: 16.59 MB / 0.7325 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.814e-05/0.6293, allocations: 2.656 kB / 0.975 GB, free: 16.59 MB / 0.7325 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.2e-05/0.6293, allocations: 26.89 kB / 0.975 GB, free: 16.57 MB / 0.7325 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.041e-05/0.6294, allocations: 17.34 kB / 0.975 GB, free: 16.57 MB / 0.7325 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0009546/0.6303, allocations: 0.5887 MB / 0.9756 GB, free: 16.38 MB / 0.7325 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.003482/0.6338, allocations: 3.535 MB / 0.979 GB, free: 13.93 MB / 0.7325 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001265/0.6351, allocations: 0.7037 MB / 0.9797 GB, free: 13.57 MB / 0.7325 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0006139/0.6357, allocations: 408.6 kB / 0.9801 GB, free: 13.38 MB / 0.7325 GB Notification: Performance of preOpt evalFunc (simulation): time 3.714e-05/0.6358, allocations: 13 kB / 0.9801 GB, free: 13.37 MB / 0.7325 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0006322/0.6364, allocations: 429 kB / 0.9805 GB, free: 13.11 MB / 0.7325 GB Notification: Performance of pre-optimization done (n=70): time 1.914e-06/0.6364, allocations: 0 / 0.9805 GB, free: 13.11 MB / 0.7325 GB Notification: Performance of matching and sorting (n=70): time 0.003508/0.6399, allocations: 1.808 MB / 0.9823 GB, free: 12.08 MB / 0.7325 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.392e-05/0.64, allocations: 62.62 kB / 0.9824 GB, free: 12.02 MB / 0.7325 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002555/0.6425, allocations: 3.308 MB / 0.9856 GB, free: 10.57 MB / 0.7325 GB Notification: Performance of collectPreVariables (initialization): time 4.594e-05/0.6426, allocations: 43.3 kB / 0.9856 GB, free: 10.53 MB / 0.7325 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006035/0.6432, allocations: 0.8773 MB / 0.9865 GB, free: 9.773 MB / 0.7325 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001461/0.6433, allocations: 226.3 kB / 0.9867 GB, free: 9.586 MB / 0.7325 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001664/0.6435, allocations: 132.2 kB / 0.9868 GB, free: 9.504 MB / 0.7325 GB Notification: Performance of setup shared object (initialization): time 9.783e-05/0.6436, allocations: 339.6 kB / 0.9872 GB, free: 9.172 MB / 0.7325 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0005394/0.6442, allocations: 302.4 kB / 0.9875 GB, free: 9.035 MB / 0.7325 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0006072/0.6448, allocations: 438.8 kB / 0.9879 GB, free: 8.742 MB / 0.7325 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001041/0.6458, allocations: 0.7191 MB / 0.9886 GB, free: 8.305 MB / 0.7325 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.207e-06/0.6458, allocations: 0 / 0.9886 GB, free: 8.305 MB / 0.7325 GB Notification: Performance of matching and sorting (n=95) (initialization): time 0.001832/0.6477, allocations: 1.216 MB / 0.9898 GB, free: 7.668 MB / 0.7325 GB Notification: Performance of prepare postOptimizeDAE: time 1.33e-05/0.6477, allocations: 6.875 kB / 0.9898 GB, free: 7.668 MB / 0.7325 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.855e-06/0.6477, allocations: 10.59 kB / 0.9898 GB, free: 7.66 MB / 0.7325 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005657/0.6483, allocations: 260.7 kB / 0.99 GB, free: 7.543 MB / 0.7325 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004005/0.6487, allocations: 128 kB / 0.9901 GB, free: 7.512 MB / 0.7325 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003934/0.6526, allocations: 4.761 MB / 0.9948 GB, free: 3.398 MB / 0.7325 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004534/0.6531, allocations: 91.64 kB / 0.9949 GB, free: 3.34 MB / 0.7325 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.287e-05/0.6532, allocations: 28.22 kB / 0.9949 GB, free: 3.332 MB / 0.7325 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,$whenCondition1,mean.y,$PRE.mean.y,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 0.0005523/0.6537, allocations: 0.6101 MB / 0.9955 GB, free: 3.004 MB / 0.7325 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001698/0.6539, allocations: 206.2 kB / 0.9957 GB, free: 2.891 MB / 0.7325 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0002782/0.6542, allocations: 244.3 kB / 0.9959 GB, free: 2.758 MB / 0.7325 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.368e-06/0.6542, allocations: 6.844 kB / 0.9959 GB, free: 2.758 MB / 0.7325 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 7.995e-06/0.6542, allocations: 2.781 kB / 0.9959 GB, free: 2.758 MB / 0.7325 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.048e-05/0.6542, allocations: 6.984 kB / 0.996 GB, free: 2.754 MB / 0.7325 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002914/0.6571, allocations: 2.338 MB / 0.9982 GB, free: 1.301 MB / 0.7325 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.645e-06/0.6572, allocations: 0 / 0.9982 GB, free: 1.301 MB / 0.7325 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002591/0.6574, allocations: 70.19 kB / 0.9983 GB, free: 1.281 MB / 0.7325 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0005105/0.6579, allocations: 262.1 kB / 0.9986 GB, free: 1.152 MB / 0.7325 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.123e-05/0.658, allocations: 19.48 kB / 0.9986 GB, free: 1.141 MB / 0.7325 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.003881/0.6619, allocations: 4.753 MB / 1.003 GB, free: 13.04 MB / 0.7481 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.052e-06/0.6619, allocations: 2.219 kB / 1.003 GB, free: 13.04 MB / 0.7481 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002167/0.6641, allocations: 1.576 MB / 1.005 GB, free: 12.14 MB / 0.7481 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0003022/0.6644, allocations: 310.1 kB / 1.005 GB, free: 11.89 MB / 0.7481 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001249/0.6645, allocations: 18.94 kB / 1.005 GB, free: 11.88 MB / 0.7481 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.000383/0.6649, allocations: 49.95 kB / 1.005 GB, free: 11.84 MB / 0.7481 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001254/0.665, allocations: 68.91 kB / 1.005 GB, free: 11.81 MB / 0.7481 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.334e-05/0.6651, allocations: 23.42 kB / 1.005 GB, free: 11.8 MB / 0.7481 GB Notification: Performance of sorting global known variables: time 0.001919/0.667, allocations: 2.426 MB / 1.008 GB, free: 10.72 MB / 0.7481 GB Notification: Performance of sort global known variables: time 1.11e-07/0.667, allocations: 0 / 1.008 GB, free: 10.72 MB / 0.7481 GB Notification: Performance of remove unused functions: time 0.0006673/0.6677, allocations: 282.7 kB / 1.008 GB, free: 10.67 MB / 0.7481 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) * 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 0.0009518/0.6686, allocations: 496 kB / 1.008 GB, free: 10.43 MB / 0.7481 GB Notification: Performance of simCode: created initialization part: time 0.001881/0.6705, allocations: 1.144 MB / 1.009 GB, free: 9.781 MB / 0.7481 GB Notification: Performance of simCode: created event and clocks part: time 2.284e-06/0.6705, allocations: 1.312 kB / 1.009 GB, free: 9.781 MB / 0.7481 GB Notification: Performance of simCode: created simulation system equations: time 0.0009151/0.6715, allocations: 0.6927 MB / 1.01 GB, free: 9.305 MB / 0.7481 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001092/0.6726, allocations: 291.8 kB / 1.01 GB, free: 9.141 MB / 0.7481 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.004394/0.677, allocations: 4.028 MB / 1.014 GB, free: 5.992 MB / 0.7481 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001022/0.678, allocations: 1.528 MB / 1.016 GB, free: 4.434 MB / 0.7481 GB Notification: Performance of simCode: alias equations: time 0.0003511/0.6784, allocations: 154.3 kB / 1.016 GB, free: 4.277 MB / 0.7481 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001409/0.6785, allocations: 67.41 kB / 1.016 GB, free: 4.211 MB / 0.7481 GB Notification: Performance of SimCode: time 2.51e-07/0.6785, allocations: 0 / 1.016 GB, free: 4.211 MB / 0.7481 GB Notification: Performance of Templates: time 0.0219/0.7004, allocations: 14.39 MB / 1.03 GB, free: 6.008 MB / 0.7638 GB make -j1 -f Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5.makefile (rm -f Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5.pipe ; mkfifo Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5.pipe ; head -c 1048576 < Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5.pipe >> ../files/Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5.sim & ./Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5 -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase5.pipe 2>&1)