Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_3.0.0_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 4.0.0+maint.om/package.mo", uses=false)
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.0.0-master/package.mo", uses=false)
Using package Buildings with version 12.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.0.0-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(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_3.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8")
translateModel(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_3.0.0_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 0.0007914/0.0007913, allocations: 90.44 kB / 15.36 MB, free: 0.7383 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.005564/0.005564, allocations: 171.9 kB / 16.26 MB, free: 6.676 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.391/1.391, allocations: 223.3 MB / 240.3 MB, free: 5.348 MB / 190.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.0.0-master/package.mo): time 2.843/2.843, allocations: 473.4 MB / 0.7469 GB, free: 6.008 MB / 0.5919 GB
Notification: Performance of FrontEnd - loaded program: time 0.0004288/0.0004289, allocations: 17.97 kB / 0.9158 GB, free: 33.01 MB / 0.7169 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.3369/0.3373, allocations: 162.2 MB / 1.074 GB, free: 7.508 MB / 0.8262 GB
Notification: Performance of NFInst.instantiate(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8): time 0.175/0.5124, allocations: 153.5 MB / 1.224 GB, free: 13.46 MB / 0.9825 GB
Notification: Performance of NFInst.instExpressions: time 0.02703/0.5395, allocations: 21.85 MB / 1.245 GB, free: 7.551 MB / 0.9981 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.002346/0.5418, allocations: 51.69 kB / 1.245 GB, free: 7.5 MB / 0.9981 GB
Notification: Performance of NFTyping.typeComponents: time 0.003154/0.545, allocations: 2.69 MB / 1.248 GB, free: 4.805 MB / 0.9981 GB
Notification: Performance of NFTyping.typeBindings: time 0.003018/0.5481, allocations: 1.718 MB / 1.25 GB, free: 3.082 MB / 0.9981 GB
Notification: Performance of NFTyping.typeClassSections: time 0.001794/0.5499, allocations: 0.6228 MB / 1.25 GB, free: 2.465 MB / 0.9981 GB
Notification: Performance of NFFlatten.flatten: time 0.003051/0.5529, allocations: 2.413 MB / 1.253 GB, free: 48 kB / 0.9981 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.7072/1.26, allocations: 1.176 MB / 1.254 GB, free: 8.891 MB / 0.9981 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.002362/1.263, allocations: 0.9622 MB / 1.255 GB, free: 8.887 MB / 0.9981 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.003173/1.266, allocations: 1.908 MB / 1.257 GB, free: 8.871 MB / 0.9981 GB
Notification: Performance of NFPackage.collectConstants: time 0.000245/1.266, allocations: 47.97 kB / 1.257 GB, free: 8.871 MB / 0.9981 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.0004671/1.266, allocations: 91.03 kB / 1.257 GB, free: 8.871 MB / 0.9981 GB
Notification: Performance of NFScalarize.scalarize: time 0.0008457/1.267, allocations: 0.6643 MB / 1.257 GB, free: 8.871 MB / 0.9981 GB
Notification: Performance of NFVerifyModel.verify: time 0.001141/1.268, allocations: 0.9477 MB / 1.258 GB, free: 8.84 MB / 0.9981 GB
Notification: Performance of NFConvertDAE.convert: time 0.003253/1.272, allocations: 2.268 MB / 1.261 GB, free: 8.742 MB / 0.9981 GB
Notification: Performance of FrontEnd - DAE generated: time 6.472e-06/1.272, allocations: 0 / 1.261 GB, free: 8.742 MB / 0.9981 GB
Notification: Performance of FrontEnd: time 2.365e-06/1.272, allocations: 0 / 1.261 GB, free: 8.742 MB / 0.9981 GB
Notification: Performance of Transformations before backend: time 6.653e-05/1.272, allocations: 4 kB / 1.261 GB, free: 8.738 MB / 0.9981 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 206
 * Number of variables: 206
Notification: Performance of Generate backend data structure: time 0.00449/1.276, allocations: 2.578 MB / 1.263 GB, free: 7.273 MB / 0.9981 GB
Notification: Performance of prepare preOptimizeDAE: time 5.413e-05/1.276, allocations: 11.86 kB / 1.263 GB, free: 7.273 MB / 0.9981 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0003349/1.277, allocations: 315.7 kB / 1.263 GB, free: 7.105 MB / 0.9981 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.001615/1.278, allocations: 1.284 MB / 1.265 GB, free: 6.453 MB / 0.9981 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001723/1.279, allocations: 114 kB / 1.265 GB, free: 6.418 MB / 0.9981 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001402/1.279, allocations: 84.86 kB / 1.265 GB, free: 6.418 MB / 0.9981 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.00192/1.281, allocations: 0.9771 MB / 1.266 GB, free: 6.336 MB / 0.9981 GB
Notification: Performance of preOpt findStateOrder (simulation): time 3.076e-05/1.281, allocations: 3.578 kB / 1.266 GB, free: 6.336 MB / 0.9981 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 8.244e-05/1.281, allocations: 37.08 kB / 1.266 GB, free: 6.336 MB / 0.9981 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.966e-05/1.281, allocations: 19.09 kB / 1.266 GB, free: 6.336 MB / 0.9981 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001679/1.282, allocations: 0.8331 MB / 1.267 GB, free: 6.328 MB / 0.9981 GB
Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.00678/1.289, allocations: 4.473 MB / 1.271 GB, free: 4.602 MB / 0.9981 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.002146/1.291, allocations: 0.9576 MB / 1.272 GB, free: 4.566 MB / 0.9981 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.001005/1.292, allocations: 0.5201 MB / 1.272 GB, free: 4.555 MB / 0.9981 GB
Notification: Performance of preOpt evalFunc (simulation): time 6.828e-05/1.293, allocations: 15.34 kB / 1.272 GB, free: 4.555 MB / 0.9981 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001129/1.294, allocations: 0.5534 MB / 1.273 GB, free: 4.5 MB / 0.9981 GB
Notification: Performance of pre-optimization done (n=91): time 4.028e-06/1.294, allocations: 0 / 1.273 GB, free: 4.5 MB / 0.9981 GB
Notification: Performance of matching and sorting (n=91): time 0.005693/1.299, allocations: 2.2 MB / 1.275 GB, free: 4.059 MB / 0.9981 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 5.902e-05/1.299, allocations: 67.27 kB / 1.275 GB, free: 3.992 MB / 0.9981 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.006821/1.306, allocations: 4.451 MB / 1.28 GB, free: 19.74 MB / 1.014 GB
Notification: Performance of collectPreVariables (initialization): time 0.0002881/1.307, allocations: 48.19 kB / 1.28 GB, free: 19.71 MB / 1.014 GB
Notification: Performance of collectInitialEqns (initialization): time 0.00111/1.308, allocations: 1.222 MB / 1.281 GB, free: 19.54 MB / 1.014 GB
Notification: Performance of collectInitialBindings (initialization): time 0.0003552/1.308, allocations: 302.4 kB / 1.281 GB, free: 19.35 MB / 1.014 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.000148/1.308, allocations: 81.66 kB / 1.281 GB, free: 19.34 MB / 1.014 GB
Notification: Performance of setup shared object (initialization): time 0.0002004/1.308, allocations: 349.2 kB / 1.281 GB, free: 19.03 MB / 1.014 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0009674/1.309, allocations: 413.5 kB / 1.282 GB, free: 19.02 MB / 1.014 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.001005/1.31, allocations: 0.5695 MB / 1.282 GB, free: 18.88 MB / 1.014 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.001699/1.312, allocations: 0.9482 MB / 1.283 GB, free: 18.74 MB / 1.014 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.681e-06/1.312, allocations: 1.125 kB / 1.283 GB, free: 18.74 MB / 1.014 GB
Notification: Performance of matching and sorting (n=118) (initialization): time 0.003316/1.315, allocations: 1.538 MB / 1.285 GB, free: 18.5 MB / 1.014 GB
Notification: Performance of prepare postOptimizeDAE: time 3.39e-05/1.316, allocations: 7.375 kB / 1.285 GB, free: 18.5 MB / 1.014 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.525e-05/1.316, allocations: 6.438 kB / 1.285 GB, free: 18.5 MB / 1.014 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.0007574/1.316, allocations: 260 kB / 1.285 GB, free: 18.48 MB / 1.014 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0007223/1.317, allocations: 183 kB / 1.285 GB, free: 18.48 MB / 1.014 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.004892/1.322, allocations: 4.371 MB / 1.29 GB, free: 15.81 MB / 1.014 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001326/1.323, allocations: 157.5 kB / 1.29 GB, free: 15.76 MB / 1.014 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.599e-05/1.323, allocations: 33.44 kB / 1.29 GB, free: 15.76 MB / 1.014 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,$whenCondition1,mean.y_last,$PRE.mean.y_last,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 0.001796/1.325, allocations: 0.7731 MB / 1.291 GB, free: 15.64 MB / 1.014 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0005084/1.326, allocations: 280.5 kB / 1.291 GB, free: 15.49 MB / 1.014 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0006998/1.326, allocations: 341.1 kB / 1.291 GB, free: 15.46 MB / 1.014 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.09e-05/1.326, allocations: 12.47 kB / 1.291 GB, free: 15.45 MB / 1.014 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 3.866e-05/1.326, allocations: 3.656 kB / 1.291 GB, free: 15.45 MB / 1.014 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 9.779e-06/1.327, allocations: 4.906 kB / 1.291 GB, free: 15.45 MB / 1.014 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.005422/1.332, allocations: 3.012 MB / 1.294 GB, free: 15.03 MB / 1.014 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.939e-06/1.332, allocations: 0 / 1.294 GB, free: 15.03 MB / 1.014 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004925/1.332, allocations: 107.7 kB / 1.294 GB, free: 15.03 MB / 1.014 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.0006783/1.333, allocations: 248.7 kB / 1.294 GB, free: 15.01 MB / 1.014 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.901e-05/1.333, allocations: 24.91 kB / 1.294 GB, free: 15.01 MB / 1.014 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.00484/1.338, allocations: 4.368 MB / 1.299 GB, free: 12.34 MB / 1.014 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.144e-06/1.338, allocations: 2.734 kB / 1.299 GB, free: 12.34 MB / 1.014 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.004301/1.342, allocations: 2.046 MB / 1.301 GB, free: 11.98 MB / 1.014 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.00113/1.344, allocations: 415.2 kB / 1.301 GB, free: 11.72 MB / 1.014 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002336/1.344, allocations: 25.81 kB / 1.301 GB, free: 11.72 MB / 1.014 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0006658/1.345, allocations: 67.53 kB / 1.301 GB, free: 11.71 MB / 1.014 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002857/1.345, allocations: 89.78 kB / 1.301 GB, free: 11.71 MB / 1.014 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 8.436e-05/1.345, allocations: 27.61 kB / 1.301 GB, free: 11.71 MB / 1.014 GB
Notification: Performance of sorting global known variables: time 0.005076/1.35, allocations: 3.257 MB / 1.304 GB, free: 11.57 MB / 1.014 GB
Notification: Performance of sort global known variables: time 6.62e-07/1.35, allocations: 2.906 kB / 1.304 GB, free: 11.57 MB / 1.014 GB
Notification: Performance of remove unused functions: time 0.002001/1.352, allocations: 362.7 kB / 1.305 GB, free: 11.54 MB / 1.014 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_last)
 * 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 0.001232/1.353, allocations: 0.5047 MB / 1.305 GB, free: 11.33 MB / 1.014 GB
Notification: Performance of simCode: created initialization part: time 0.002593/1.356, allocations: 1.311 MB / 1.307 GB, free: 11.06 MB / 1.014 GB
Notification: Performance of simCode: created event and clocks part: time 3.377e-06/1.356, allocations: 0 / 1.307 GB, free: 11.06 MB / 1.014 GB
Notification: Performance of simCode: created simulation system equations: time 0.001244/1.357, allocations: 0.8161 MB / 1.307 GB, free: 10.81 MB / 1.014 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002236/1.359, allocations: 325.1 kB / 1.308 GB, free: 10.78 MB / 1.014 GB
Warning: The hideResult annotation could not be evaluated, probably due to missing annotation(Evaluate=true). It is removed.
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.00986/1.369, allocations: 6.115 MB / 1.314 GB, free: 8.41 MB / 1.014 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.00265/1.372, allocations: 1.825 MB / 1.315 GB, free: 7.645 MB / 1.014 GB
Notification: Performance of simCode: alias equations: time 0.001043/1.373, allocations: 218 kB / 1.316 GB, free: 7.609 MB / 1.014 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0004219/1.373, allocations: 81.16 kB / 1.316 GB, free: 7.602 MB / 1.014 GB
Notification: Performance of SimCode: time 1.183e-06/1.373, allocations: 0 / 1.316 GB, free: 7.602 MB / 1.014 GB
Notification: Performance of Templates: time 0.03457/1.408, allocations: 16.26 MB / 1.332 GB, free: 4.855 MB / 1.014 GB
make -j1 -f Buildings_3.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.makefile
(rm -f Buildings_3.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.pipe ; mkfifo Buildings_3.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.pipe ; head -c 1048576 < Buildings_3.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.pipe >> ../files/Buildings_3.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.sim & ./Buildings_3.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8  -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_3.0.0_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase8.pipe 2>&1)