Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr IDEAS_dev_IDEAS.Fluid.Examples.FlowSystem.Simplified3.conf.json 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/IDEAS 3.0.0-master/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/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/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 IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/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) Running command: "" <> buildModelFMU(IDEAS.Fluid.Examples.FlowSystem.Simplified3,fileNamePrefix="IDEAS_dev_IDEAS_Fluid_Examples_FlowSystem_Simplified3",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IDEAS.Fluid.Examples.FlowSystem.Simplified3,fileNamePrefix="IDEAS_dev_IDEAS_Fluid_Examples_FlowSystem_Simplified3",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.01354/0.01354, allocations: 171.1 kB / 15.11 MB, free: 5.988 MB / 13.93 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 1.321/1.321, allocations: 135.2 MB / 151 MB, free: 13.86 MB / 122.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 2.84/2.84, allocations: 223.2 MB / 406.8 MB, free: 3.238 MB / 330.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.00162/0.00162, allocations: 97.16 kB / 489.9 MB, free: 10.93 MB / 362.7 MB Notification: Performance of FrontEnd - loaded program: time 0.0005853/0.0005853, allocations: 8 kB / 0.5692 GB, free: 14.09 MB / 458.7 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.9/0.9006, allocations: 82.3 MB / 0.6495 GB, free: 36.15 MB / 458.7 MB Notification: Performance of FrontEnd - scodeFlatten: time 2.387/3.287, allocations: 424.4 MB / 1.064 GB, free: 251.3 MB / 0.6823 GB Notification: Performance of FrontEnd - mkProgramGraph: time 0.0004433/3.288, allocations: 99.94 kB / 1.064 GB, free: 251.3 MB / 0.6823 GB Notification: Performance of FrontEnd - DAE generated: time 62.56/65.85, allocations: 9.584 GB / 10.65 GB, free: 71.89 MB / 0.9636 GB Notification: Performance of FrontEnd: time 3.397e-06/65.85, allocations: 3.281 kB / 10.65 GB, free: 71.89 MB / 0.9636 GB Notification: Performance of Transformations before backend: time 0.003742/65.85, allocations: 430.1 kB / 10.65 GB, free: 71.82 MB / 0.9636 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 2029 * Number of variables: 2029 Notification: Performance of Generate backend data structure: time 0.09744/65.95, allocations: 20.64 MB / 10.67 GB, free: 64.32 MB / 0.9636 GB Notification: Performance of prepare preOptimizeDAE: time 6.015e-05/65.95, allocations: 8.906 kB / 10.67 GB, free: 64.32 MB / 0.9636 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.007982/65.96, allocations: 1.043 MB / 10.67 GB, free: 64.23 MB / 0.9636 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0195/65.98, allocations: 2.193 MB / 10.67 GB, free: 63.25 MB / 0.9636 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.09342/66.07, allocations: 21.82 MB / 10.69 GB, free: 60.73 MB / 0.9636 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.001727/66.07, allocations: 0.6764 MB / 10.69 GB, free: 60.71 MB / 0.9636 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.007741/66.08, allocations: 0.9503 MB / 10.69 GB, free: 60.7 MB / 0.9636 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.05234/66.13, allocations: 15.76 MB / 10.71 GB, free: 59.88 MB / 0.9636 GB Notification: Performance of preOpt findStateOrder (simulation): time 0.000535/66.13, allocations: 17.38 kB / 10.71 GB, free: 59.88 MB / 0.9636 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.004855/66.14, allocations: 326.5 kB / 10.71 GB, free: 59.88 MB / 0.9636 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0004805/66.14, allocations: 374.7 kB / 10.71 GB, free: 59.86 MB / 0.9636 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.04653/66.18, allocations: 20.02 MB / 10.73 GB, free: 59.79 MB / 0.9636 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 0.1789/66.36, allocations: 79.88 MB / 10.81 GB, free: 25.38 MB / 0.9636 GB Notification: Performance of preOpt comSubExp (simulation): time 0.02311/66.39, allocations: 11.97 MB / 10.82 GB, free: 24.9 MB / 0.9636 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 evalFunc (simulation): time 0.08679/66.47, allocations: 33.35 MB / 10.85 GB, free: 12.45 MB / 0.9636 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.02055/66.49, allocations: 9.348 MB / 10.86 GB, free: 9.129 MB / 0.9636 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.05149/66.55, allocations: 14.84 MB / 10.88 GB, free: 7.645 MB / 0.9636 GB Notification: Performance of pre-optimization done (n=593): time 5.263e-05/66.55, allocations: 0 / 10.88 GB, free: 7.645 MB / 0.9636 GB Notification: Performance of matching and sorting (n=807): time 1.983/68.53, allocations: 201.5 MB / 11.07 GB, free: 89.5 MB / 0.9792 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001453/68.53, allocations: 137.3 kB / 11.07 GB, free: 89.43 MB / 0.9792 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.04462/68.57, allocations: 14.41 MB / 11.09 GB, free: 88.69 MB / 0.9792 GB Notification: Performance of collectPreVariables (initialization): time 0.005338/68.58, allocations: 232.9 kB / 11.09 GB, free: 88.66 MB / 0.9792 GB Notification: Performance of collectInitialEqns (initialization): time 0.01229/68.59, allocations: 7.265 MB / 11.09 GB, free: 87.48 MB / 0.9792 GB Notification: Performance of collectInitialBindings (initialization): time 0.007468/68.6, allocations: 2.808 MB / 11.1 GB, free: 86.05 MB / 0.9792 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.003931/68.6, allocations: 195.8 kB / 11.1 GB, free: 86.05 MB / 0.9792 GB Notification: Performance of setup shared object (initialization): time 0.001051/68.6, allocations: 0.7051 MB / 11.1 GB, free: 85.73 MB / 0.9792 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0224/68.63, allocations: 9.799 MB / 11.11 GB, free: 85.67 MB / 0.9792 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.02698/68.65, allocations: 12.74 MB / 11.12 GB, free: 82.41 MB / 0.9792 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.025/68.68, allocations: 11.01 MB / 11.13 GB, free: 82.11 MB / 0.9792 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 0.0001732/68.68, allocations: 14.44 kB / 11.13 GB, free: 82.11 MB / 0.9792 GB Notification: Performance of matching and sorting (n=1301) (initialization): time 0.5811/69.26, allocations: 128.3 MB / 11.26 GB, free: 15.16 MB / 0.9792 GB Notification: Performance of prepare postOptimizeDAE: time 1.103/70.36, allocations: 36.95 MB / 11.29 GB, free: 85.4 MB / 0.9948 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0003642/70.36, allocations: 53.19 kB / 11.29 GB, free: 85.4 MB / 0.9948 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.6147/70.98, allocations: 146.4 MB / 11.44 GB, free: 85.15 MB / 0.9948 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.01726/71, allocations: 3.199 MB / 11.44 GB, free: 85.13 MB / 0.9948 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.1422/71.14, allocations: 74.36 MB / 11.51 GB, free: 78.82 MB / 0.9948 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.02809/71.17, allocations: 1.62 MB / 11.51 GB, free: 78.75 MB / 0.9948 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.007186/71.17, allocations: 0.869 MB / 11.51 GB, free: 78.75 MB / 0.9948 GB Notification: Performance of prepare postOptimizeDAE: time 1.595e-05/71.17, allocations: 4.906 kB / 11.51 GB, free: 78.75 MB / 0.9948 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.5518/71.72, allocations: 127.1 MB / 11.64 GB, free: 3.008 MB / 1.01 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0003516/71.73, allocations: 52 kB / 11.64 GB, free: 2.957 MB / 1.01 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.501/73.23, allocations: 146.7 MB / 11.78 GB, free: 110.6 MB / 1.026 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.01504/73.24, allocations: 3.186 MB / 11.78 GB, free: 110.6 MB / 1.026 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.143/73.38, allocations: 79.08 MB / 11.86 GB, free: 106 MB / 1.026 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.02521/73.41, allocations: 1.589 MB / 11.86 GB, free: 106 MB / 1.026 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.004615/73.41, allocations: 0.8296 MB / 11.86 GB, free: 106 MB / 1.026 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 241 * Number of states: 0 () * Number of discrete variables: 10 ($whenCondition1,$whenCondition2,booleanToInteger.u,booleanToInteger.y,$PRE.stepPump.pulseStart,stepPump.pulseStart,$PRE.stepValve.T_start,stepValve.T_start,$PRE.stepValve.count,stepValve.count) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (1035): * Single equations (assignments): 1021 * Array equations: 4 * Algorithm blocks: 1 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 6 * Torn equation systems: 3 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 0 * Non-linear Jacobian: 6 {1,1,1,1,1,1} * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 1 {(28,89.3%) 28} * Non-linear torn systems: 2 {6 82,6 82} Notification: Performance of prepare postOptimizeDAE: time 0.01384/73.43, allocations: 3.935 MB / 11.87 GB, free: 105.8 MB / 1.026 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.00565/73.43, allocations: 1.474 MB / 11.87 GB, free: 105.8 MB / 1.026 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.1907/73.62, allocations: 50.24 MB / 11.92 GB, free: 101.9 MB / 1.026 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 0.0001755/73.62, allocations: 96.78 kB / 11.92 GB, free: 101.8 MB / 1.026 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 0.0001678/73.62, allocations: 32 kB / 11.92 GB, free: 101.8 MB / 1.026 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.1714/73.8, allocations: 44.31 MB / 11.96 GB, free: 71.98 MB / 1.026 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.2286/74.02, allocations: 67.77 MB / 12.03 GB, free: 19.8 MB / 1.026 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 9.224e-05/74.02, allocations: 1.75 kB / 12.03 GB, free: 19.8 MB / 1.026 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.9455/74.97, allocations: 1.826 MB / 12.03 GB, free: 119.7 MB / 1.026 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.1818/75.15, allocations: 41.75 MB / 12.07 GB, free: 119.7 MB / 1.026 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.003152/75.16, allocations: 337.9 kB / 12.07 GB, free: 119.7 MB / 1.026 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.06026/75.22, allocations: 29.06 MB / 12.1 GB, free: 114.5 MB / 1.026 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.666e-06/75.22, allocations: 0 / 12.1 GB, free: 114.5 MB / 1.026 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.2072/75.42, allocations: 58.3 MB / 12.16 GB, free: 113.2 MB / 1.026 GB Notification: Performance of postOpt removeConstants (simulation): time 0.01818/75.44, allocations: 3.689 MB / 12.16 GB, free: 113.1 MB / 1.026 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.009764/75.45, allocations: 252.9 kB / 12.16 GB, free: 113.1 MB / 1.026 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0216/75.47, allocations: 1.314 MB / 12.16 GB, free: 113.1 MB / 1.026 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.004416/75.48, allocations: 0.5737 MB / 12.16 GB, free: 113.1 MB / 1.026 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.003148/75.48, allocations: 356.7 kB / 12.16 GB, free: 113.1 MB / 1.026 GB Notification: Performance of sorting global known variables: time 0.03344/75.51, allocations: 11.06 MB / 12.17 GB, free: 112.7 MB / 1.026 GB Notification: Performance of sort global known variables: time 6.91e-07/75.51, allocations: 1.312 kB / 12.17 GB, free: 112.7 MB / 1.026 GB Notification: Performance of remove unused functions: time 0.06753/75.58, allocations: 8.734 MB / 12.18 GB, free: 112.7 MB / 1.026 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * Number of states: 74 (pmpSouth.vol.dynBal.U,pmpSouth.filter.s[1],pmpSouth.filter.s[2],pmpNorth.vol.dynBal.U,pmpNorth.filter.s[1],pmpNorth.filter.s[2],valSouth1[1].filter.s[1],valSouth1[1].filter.s[2],valSouth1[2].filter.s[1],valSouth1[2].filter.s[2],valSouth1[3].filter.s[1],valSouth1[3].filter.s[2],valSouth1[4].filter.s[1],valSouth1[4].filter.s[2],valSouth2[1].filter.s[1],valSouth2[1].filter.s[2],valSouth2[2].filter.s[1],valSouth2[2].filter.s[2],valSouth2[3].filter.s[1],valSouth2[3].filter.s[2],valSouth2[4].filter.s[1],valSouth2[4].filter.s[2],valSouth2[5].filter.s[1],valSouth2[5].filter.s[2],valSouth2[6].filter.s[1],valSouth2[6].filter.s[2],valSouth2[7].filter.s[1],valSouth2[7].filter.s[2],valSouth2[8].filter.s[1],valSouth2[8].filter.s[2],valNorth1[1].filter.s[1],valNorth1[1].filter.s[2],valNorth1[2].filter.s[1],valNorth1[2].filter.s[2],valNorth1[3].filter.s[1],valNorth1[3].filter.s[2],valNorth1[4].filter.s[1],valNorth1[4].filter.s[2],valNorth2[1].filter.s[1],valNorth2[1].filter.s[2],valNorth2[2].filter.s[1],valNorth2[2].filter.s[2],valNorth2[3].filter.s[1],valNorth2[3].filter.s[2],valNorth2[4].filter.s[1],valNorth2[4].filter.s[2],valNorth2[5].filter.s[1],valNorth2[5].filter.s[2],valNorth2[6].filter.s[1],valNorth2[6].filter.s[2],valNorth2[7].filter.s[1],valNorth2[7].filter.s[2],valNorth2[8].filter.s[1],valNorth2[8].filter.s[2],valSouth.vol.dynBal.U,valSouth.filter.s[1],valSouth.filter.s[2],valNorth.vol.dynBal.U,valNorth.filter.s[1],valNorth.filter.s[2],spl.vol.dynBal.U,spl1.vol.dynBal.U,pumpHea.vol.dynBal.U,pumpHea.filter.s[1],pumpHea.filter.s[2],valHea.filter.s[1],valHea.filter.s[2],valCoo.filter.s[1],valCoo.filter.s[2],spl2.vol.dynBal.U,spl3.vol.dynBal.U,pumpCoo.vol.dynBal.U,pumpCoo.filter.s[1],vol.p) * Number of discrete variables: 7 ($whenCondition2,$whenCondition1,booleanToInteger.u,booleanToInteger.y,stepPump.pulseStart,stepValve.T_start,stepValve.count) * Number of discrete states: 1 (stepValve.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (732): * Single equations (assignments): 711 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 10 * When equations: 3 * If-equations: 0 * Equation systems (linear and non-linear blocks): 5 * Torn equation systems: 3 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 0 * Non-linear Jacobian: 5 {1,1,1,1,1} * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 1 {(28,89.3%) 28} * Non-linear torn systems: 2 {6 81,7 83} Notification: Performance of Backend phase and start with SimCode phase: time 0.2242/75.81, allocations: 64 MB / 12.24 GB, free: 108.3 MB / 1.026 GB Notification: Performance of simCode: created initialization part: time 0.09373/75.9, allocations: 40.07 MB / 12.28 GB, free: 95.36 MB / 1.026 GB Notification: Performance of simCode: created event and clocks part: time 1.017e-05/75.9, allocations: 7.969 kB / 12.28 GB, free: 95.36 MB / 1.026 GB Notification: Performance of simCode: created simulation system equations: time 0.0246/75.92, allocations: 11.29 MB / 12.29 GB, free: 89.74 MB / 1.026 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.03877/75.96, allocations: 7.16 MB / 12.3 GB, free: 86.14 MB / 1.026 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.1238/76.09, allocations: 92.67 MB / 12.39 GB, free: 2.152 MB / 1.026 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.01886/76.11, allocations: 8.999 MB / 12.4 GB, free: 12.07 MB / 1.042 GB Notification: Performance of simCode: alias equations: time 0.02998/76.14, allocations: 5.561 MB / 12.41 GB, free: 8.184 MB / 1.042 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.01968/76.16, allocations: 7.672 MB / 12.41 GB, free: 1.129 MB / 1.042 GB Notification: Performance of SimCode: time 1.092e-06/76.16, allocations: 0 / 12.41 GB, free: 1.129 MB / 1.042 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 3.715/79.87, allocations: 0.5825 GB / 13 GB, free: 161.2 MB / 1.089 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0001888/79.87, allocations: 245.2 kB / 13 GB, free: 160.9 MB / 1.089 GB Notification: Performance of buildModelFMU: Generate platform static: time 34.93/114.8, allocations: 3.938 kB / 13 GB, free: 160.9 MB / 1.089 GB (rm -f IDEAS_dev_IDEAS.Fluid.Examples.FlowSystem.Simplified3.pipe ; mkfifo IDEAS_dev_IDEAS.Fluid.Examples.FlowSystem.Simplified3.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Fluid.Examples.FlowSystem.Simplified3.pipe >> ../files/IDEAS_dev_IDEAS.Fluid.Examples.FlowSystem.Simplified3.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_IDEAS_dev_IDEAS_Fluid_Examples_FlowSystem_Simplified3_fmu --startTime=0 --stopTime=1000 --timeout=50 --tolerance=1e-06 IDEAS_dev_IDEAS_Fluid_Examples_FlowSystem_Simplified3.fmu > IDEAS_dev_IDEAS.Fluid.Examples.FlowSystem.Simplified3.pipe 2>&1)