Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.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-master/package.mo", uses=false)
Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-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: "" <> buildModelFMU(IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7,fileNamePrefix="IDEAS_dev_IDEAS_ThermalZones_ReducedOrder_Validation_VDI6007_TestCase7",fmuType="me",version="2.0",platforms={"static"})
"" <> buildModelFMU(IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7,fileNamePrefix="IDEAS_dev_IDEAS_ThermalZones_ReducedOrder_Validation_VDI6007_TestCase7",fmuType="me",version="2.0",platforms={"static"})
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001124/0.001124, allocations: 108 kB / 15.61 MB, free: 152 kB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001163/0.001163, allocations: 194.5 kB / 16.53 MB, free: 6.699 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.327/1.327, allocations: 222.9 MB / 240.2 MB, free: 4.379 MB / 190.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 0.9129/0.9129, allocations: 135.1 MB / 425.5 MB, free: 11.97 MB / 350.1 MB
Notification: Performance of FrontEnd - loaded program: time 0.001242/0.001242, allocations: 62.89 kB / 0.5055 GB, free: 5.215 MB / 414.1 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.1307/0.1319, allocations: 80.93 MB / 0.5845 GB, free: 4.441 MB / 494.1 MB
Notification: Performance of NFInst.instantiate(IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7): time 0.3623/0.4942, allocations: 157.8 MB / 0.7386 GB, free: 10.52 MB / 0.5606 GB
Notification: Performance of NFInst.instExpressions: time 0.0241/0.5184, allocations: 22.12 MB / 0.7602 GB, free: 8.766 MB / 0.5762 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.001985/0.5204, allocations: 67.62 kB / 0.7603 GB, free: 8.699 MB / 0.5762 GB
Notification: Performance of NFTyping.typeComponents: time 0.001658/0.5221, allocations: 1.383 MB / 0.7616 GB, free: 7.312 MB / 0.5762 GB
Notification: Performance of NFTyping.typeBindings: time 0.001491/0.5236, allocations: 1.012 MB / 0.7626 GB, free: 6.297 MB / 0.5762 GB
Notification: Performance of NFTyping.typeClassSections: time 0.001392/0.525, allocations: 0.6412 MB / 0.7632 GB, free: 5.664 MB / 0.5762 GB
Notification: Performance of NFFlatten.flatten: time 0.00144/0.5265, allocations: 1.692 MB / 0.7649 GB, free: 3.973 MB / 0.5762 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.001008/0.5275, allocations: 0.9665 MB / 0.7658 GB, free: 3.004 MB / 0.5762 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.0007223/0.5282, allocations: 0.732 MB / 0.7665 GB, free: 2.27 MB / 0.5762 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.001141/0.5294, allocations: 1.191 MB / 0.7677 GB, free: 1.078 MB / 0.5762 GB
Notification: Performance of NFPackage.collectConstants: time 0.000149/0.5295, allocations: 92 kB / 0.7678 GB, free: 0.9883 MB / 0.5762 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.0002981/0.5298, allocations: 140 kB / 0.7679 GB, free: 0.8516 MB / 0.5762 GB
Notification: Performance of NFScalarize.scalarize: time 0.0002987/0.5301, allocations: 416.3 kB / 0.7683 GB, free: 452 kB / 0.5762 GB
Notification: Performance of NFVerifyModel.verify: time 0.0004922/0.5306, allocations: 0.6597 MB / 0.769 GB, free: 15.77 MB / 0.5919 GB
Notification: Performance of NFConvertDAE.convert: time 0.001271/0.5319, allocations: 1.572 MB / 0.7705 GB, free: 14.2 MB / 0.5919 GB
Notification: Performance of FrontEnd - DAE generated: time 3.476e-06/0.5319, allocations: 3.938 kB / 0.7705 GB, free: 14.2 MB / 0.5919 GB
Notification: Performance of FrontEnd: time 1.312e-06/0.5319, allocations: 4 kB / 0.7705 GB, free: 14.19 MB / 0.5919 GB
Notification: Performance of Transformations before backend: time 1.286e-05/0.5319, allocations: 0 / 0.7705 GB, free: 14.19 MB / 0.5919 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 157
 * Number of variables: 157
Notification: Performance of Generate backend data structure: time 0.002667/0.5346, allocations: 1.915 MB / 0.7724 GB, free: 12.22 MB / 0.5919 GB
Notification: Performance of prepare preOptimizeDAE: time 3.498e-05/0.5347, allocations: 12.02 kB / 0.7724 GB, free: 12.21 MB / 0.5919 GB
Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001284/0.5348, allocations: 110.7 kB / 0.7725 GB, free: 12.09 MB / 0.5919 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0002569/0.5351, allocations: 182.7 kB / 0.7727 GB, free: 11.91 MB / 0.5919 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.001072/0.5361, allocations: 0.8668 MB / 0.7735 GB, free: 11 MB / 0.5919 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001291/0.5363, allocations: 90.94 kB / 0.7736 GB, free: 10.9 MB / 0.5919 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 9.531e-05/0.5364, allocations: 68 kB / 0.7737 GB, free: 10.84 MB / 0.5919 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.001202/0.5376, allocations: 0.7215 MB / 0.7744 GB, free: 10.09 MB / 0.5919 GB
Notification: Performance of preOpt findStateOrder (simulation): time 1.995e-05/0.5376, allocations: 0 / 0.7744 GB, free: 10.09 MB / 0.5919 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 6.135e-05/0.5377, allocations: 28 kB / 0.7744 GB, free: 10.06 MB / 0.5919 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.651e-05/0.5377, allocations: 16 kB / 0.7744 GB, free: 10.04 MB / 0.5919 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001136/0.5389, allocations: 0.5476 MB / 0.775 GB, free: 9.496 MB / 0.5919 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 0.004202/0.5431, allocations: 3.628 MB / 0.7785 GB, free: 5.582 MB / 0.5919 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.001295/0.5444, allocations: 0.6121 MB / 0.7791 GB, free: 4.965 MB / 0.5919 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0007103/0.5451, allocations: 376.6 kB / 0.7795 GB, free: 4.598 MB / 0.5919 GB
Notification: Performance of preOpt evalFunc (simulation): time 3.889e-05/0.5451, allocations: 4.562 kB / 0.7795 GB, free: 4.594 MB / 0.5919 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0006992/0.5459, allocations: 386.9 kB / 0.7798 GB, free: 4.207 MB / 0.5919 GB
Notification: Performance of pre-optimization done (n=65): time 2.264e-06/0.5459, allocations: 0 / 0.7798 GB, free: 4.207 MB / 0.5919 GB
Notification: Performance of matching and sorting (n=65): time 0.004926/0.5508, allocations: 1.773 MB / 0.7816 GB, free: 2.383 MB / 0.5919 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 4.429e-05/0.5509, allocations: 67.91 kB / 0.7816 GB, free: 2.305 MB / 0.5919 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002141/0.553, allocations: 2.251 MB / 0.7838 GB, free: 48 kB / 0.5919 GB
Notification: Performance of collectPreVariables (initialization): time 6.198e-05/0.5531, allocations: 45.78 kB / 0.7839 GB, free: 15.99 MB / 0.6075 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0005163/0.5536, allocations: 0.7109 MB / 0.7846 GB, free: 15.27 MB / 0.6075 GB
Notification: Performance of collectInitialBindings (initialization): time 0.0001548/0.5538, allocations: 216.8 kB / 0.7848 GB, free: 15.06 MB / 0.6075 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001822/0.554, allocations: 134.6 kB / 0.7849 GB, free: 14.93 MB / 0.6075 GB
Notification: Performance of setup shared object (initialization): time 9.912e-05/0.5541, allocations: 334 kB / 0.7852 GB, free: 14.59 MB / 0.6075 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006215/0.5547, allocations: 273.8 kB / 0.7855 GB, free: 14.32 MB / 0.6075 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0007087/0.5554, allocations: 424.8 kB / 0.7859 GB, free: 13.86 MB / 0.6075 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.001188/0.5566, allocations: 0.663 MB / 0.7865 GB, free: 13.15 MB / 0.6075 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.757e-06/0.5566, allocations: 0 / 0.7865 GB, free: 13.15 MB / 0.6075 GB
Notification: Performance of matching and sorting (n=93) (initialization): time 0.002249/0.5589, allocations: 1.114 MB / 0.7876 GB, free: 12.02 MB / 0.6075 GB
Notification: Performance of prepare postOptimizeDAE: time 2.065e-05/0.5589, allocations: 11.98 kB / 0.7876 GB, free: 12.01 MB / 0.6075 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.698e-06/0.5589, allocations: 4 kB / 0.7876 GB, free: 12.01 MB / 0.6075 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.0007932/0.5597, allocations: 274.9 kB / 0.7879 GB, free: 11.74 MB / 0.6075 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004441/0.5602, allocations: 119.8 kB / 0.788 GB, free: 11.62 MB / 0.6075 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.005097/0.5653, allocations: 3.72 MB / 0.7916 GB, free: 7.785 MB / 0.6075 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0005427/0.5658, allocations: 83.39 kB / 0.7917 GB, free: 7.703 MB / 0.6075 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.612e-05/0.5659, allocations: 32 kB / 0.7917 GB, free: 7.672 MB / 0.6075 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 17
 * Number of states: 0 ()
 * Number of discrete variables: 25 (assEqu.nFai,$PRE.assEqu.nFai,$whenCondition6,$PRE.intGai.nextTimeEvent,$whenCondition5,$PRE.reference.nextTimeEvent,$whenCondition4,$PRE.setTemp.nextTimeEvent,$whenCondition3,$whenCondition1,mean.y_last,$PRE.mean.y_last,assEqu.satisfied,$PRE.assEqu.satisfied,reference.nextTimeEventScaled,$PRE.reference.nextTimeEventScaled,reference.nextTimeEvent,$whenCondition2,setTemp.nextTimeEventScaled,$PRE.setTemp.nextTimeEventScaled,setTemp.nextTimeEvent,intGai.nextTimeEventScaled,$PRE.intGai.nextTimeEventScaled,intGai.nextTimeEvent,conHeaCoo.I.trigger_internal)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (67):
 * Single equations (assignments): 66
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 1
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems (#iteration vars, #inner vars, density): 0 systems
 * Non-linear torn systems (#iteration vars, #inner vars): 1 system
   {(2,25)}
Notification: Performance of prepare postOptimizeDAE: time 0.0005431/0.5664, allocations: 463.8 kB / 0.7922 GB, free: 7.211 MB / 0.6075 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001629/0.5666, allocations: 161.9 kB / 0.7923 GB, free: 7.051 MB / 0.6075 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0002737/0.5669, allocations: 187.7 kB / 0.7925 GB, free: 6.863 MB / 0.6075 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 7.264e-06/0.5669, allocations: 11.94 kB / 0.7925 GB, free: 6.852 MB / 0.6075 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 5.109e-06/0.5669, allocations: 0 / 0.7925 GB, free: 6.852 MB / 0.6075 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.286e-06/0.5669, allocations: 3.984 kB / 0.7925 GB, free: 6.848 MB / 0.6075 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003222/0.5702, allocations: 2.041 MB / 0.7945 GB, free: 4.742 MB / 0.6075 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.016e-06/0.5702, allocations: 0 / 0.7945 GB, free: 4.742 MB / 0.6075 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002793/0.5705, allocations: 51.91 kB / 0.7946 GB, free: 4.691 MB / 0.6075 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.0007566/0.5712, allocations: 281 kB / 0.7948 GB, free: 4.414 MB / 0.6075 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.161e-05/0.5713, allocations: 16 kB / 0.7949 GB, free: 4.398 MB / 0.6075 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.00566/0.577, allocations: 5.237 MB / 0.8 GB, free: 14.88 MB / 0.6231 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.705e-06/0.577, allocations: 7.922 kB / 0.8 GB, free: 14.88 MB / 0.6231 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002584/0.5796, allocations: 1.393 MB / 0.8013 GB, free: 13.46 MB / 0.6231 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.000302/0.5799, allocations: 270.9 kB / 0.8016 GB, free: 13.17 MB / 0.6231 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001288/0.58, allocations: 16 kB / 0.8016 GB, free: 13.16 MB / 0.6231 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0004195/0.5804, allocations: 39.97 kB / 0.8017 GB, free: 13.12 MB / 0.6231 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001439/0.5806, allocations: 68.31 kB / 0.8017 GB, free: 13.05 MB / 0.6231 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.171e-05/0.5807, allocations: 27.98 kB / 0.8017 GB, free: 13.02 MB / 0.6231 GB
Notification: Performance of sorting global known variables: time 0.001631/0.5823, allocations: 1.627 MB / 0.8033 GB, free: 11.4 MB / 0.6231 GB
Notification: Performance of sort global known variables: time 1.8e-07/0.5823, allocations: 3.938 kB / 0.8033 GB, free: 11.4 MB / 0.6231 GB
Notification: Performance of remove unused functions: time 0.0008511/0.5832, allocations: 276.1 kB / 0.8036 GB, free: 11.13 MB / 0.6231 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 1
 * Number of states: 5 (thermalZoneTwoElements.extWallRC.thermCapExt[1].T,thermalZoneTwoElements.intWallRC.thermCapInt[1].T,conHeaCoo.I.y,assEqu.diff,mean.x)
 * Number of discrete variables: 15 ($whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,intGai.nextTimeEvent,intGai.nextTimeEventScaled,reference.nextTimeEvent,reference.nextTimeEventScaled,setTemp.nextTimeEvent,setTemp.nextTimeEventScaled,assEqu.satisfied,assEqu.nFai,mean.y_last)
 * Number of discrete states: 9 (intGai.nextTimeEvent,reference.nextTimeEvent,setTemp.nextTimeEvent,mean.x,assEqu.satisfied,assEqu.nFai,setTemp.nextTimeEventScaled,reference.nextTimeEventScaled,intGai.nextTimeEventScaled)
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for simulation (39):
 * Single equations (assignments): 29
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 8
 * 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): 1 system
   {(1,3,100.0%)}
 * Non-linear torn systems (#iteration vars, #inner vars): 1 system
   {(2,22)}
Notification: Performance of Backend phase and start with SimCode phase: time 0.003822/0.587, allocations: 2.329 MB / 0.8059 GB, free: 8.98 MB / 0.6231 GB
Notification: Performance of simCode: created initialization part: time 0.002066/0.5891, allocations: 0.9563 MB / 0.8068 GB, free: 8.012 MB / 0.6231 GB
Notification: Performance of simCode: created event and clocks part: time 2.815e-06/0.5891, allocations: 0 / 0.8068 GB, free: 8.012 MB / 0.6231 GB
Notification: Performance of simCode: created simulation system equations: time 0.001116/0.5902, allocations: 0.6789 MB / 0.8075 GB, free: 7.309 MB / 0.6231 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001316/0.5915, allocations: 275.1 kB / 0.8077 GB, free: 7.047 MB / 0.6231 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01636/0.6079, allocations: 12.02 MB / 0.8195 GB, free: 10.38 MB / 0.6387 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0009227/0.6089, allocations: 1.318 MB / 0.8208 GB, free: 9.031 MB / 0.6387 GB
Notification: Performance of simCode: alias equations: time 0.0003935/0.6093, allocations: 118.4 kB / 0.8209 GB, free: 8.91 MB / 0.6387 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0005794/0.6099, allocations: 0.5422 MB / 0.8214 GB, free: 8.367 MB / 0.6387 GB
Notification: Performance of SimCode: time 4.61e-07/0.6099, allocations: 3.938 kB / 0.8214 GB, free: 8.363 MB / 0.6387 GB
Notification: Performance of buildModelFMU: Generate the FMI files: time 0.05734/0.6672, allocations: 28.67 MB / 0.8494 GB, free: 12.04 MB / 0.67 GB
Notification: Performance of buildModelFMU: Generate platform static: time 11.79/12.45, allocations: 14.58 kB / 0.8494 GB, free: 12.03 MB / 0.67 GB
(rm -f IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.pipe ; mkfifo IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.pipe >> ../files/IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.sim & python3 -m fmpy simulate  --output-file IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7_res.csv --start-time 0 --stop-time 5.184e+06 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 60 IDEAS_dev_IDEAS_ThermalZones_ReducedOrder_Validation_VDI6007_TestCase7.fmu > IDEAS_dev_IDEAS.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase7.pipe 2>&1)