Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr AES_AES.Coursework.ThermSys_Generation.Hcentral_control_case_002.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/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/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 Complex with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Using package AES with version (/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/package.mo) Running command: translateModel(AES.Coursework.ThermSys_Generation.Hcentral_control_case_002,tolerance=1e-06,outputFormat="empty",numberOfIntervals=20000,variableFilter="",fileNamePrefix="AES_AES.Coursework.ThermSys_Generation.Hcentral_control_case_002") translateModel(AES.Coursework.ThermSys_Generation.Hcentral_control_case_002,tolerance=1e-06,outputFormat="empty",numberOfIntervals=20000,variableFilter="",fileNamePrefix="AES_AES.Coursework.ThermSys_Generation.Hcentral_control_case_002") [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/Coursework/ThermSys_case_studies/Heat_network/HC_SS_case_001.mo:3:1-67:19:writable] Warning: Expected the package to have within AES.Coursework.ThermSys_case_studies.Heat_network; but got within AES.Coursework.ThermSys_case_studies.heat_network; (ignoring the potential error; the class might have been inserted at an unexpected location). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/Coursework/ThermSys_case_studies/Heat_network/HC_case_001.mo:3:1-55:16:writable] Warning: Expected the package to have within AES.Coursework.ThermSys_case_studies.Heat_network; but got within AES.Coursework.ThermSys_case_studies.heat_network; (ignoring the potential error; the class might have been inserted at an unexpected location). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/Coursework/ThermSys_case_studies/Heat_network/HNcontrol_HC_SS_case_002.mo:3:1-91:29:writable] Warning: Expected the package to have within AES.Coursework.ThermSys_case_studies.Heat_network; but got within AES.Coursework.ThermSys_case_studies.heat_network; (ignoring the potential error; the class might have been inserted at an unexpected location). [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/Coursework/ThermSys_case_studies/Heat_network/HNcontrol_HC_SS_case_001.mo:3:1-85:29:writable] Warning: Expected the package to have within AES.Coursework.ThermSys_case_studies.Heat_network; but got within AES.Coursework.ThermSys_case_studies.heat_network; (ignoring the potential error; the class might have been inserted at an unexpected location). Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/AES main/package.mo): time 0.09282/0.09282, allocations: 21.61 MB / 36.56 MB, free: 1.051 MB / 24.77 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.0009347/0.0009347, allocations: 187.3 kB / 42.83 MB, free: 3.781 MB / 33.03 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.246/1.246, allocations: 223.2 MB / 272.1 MB, free: 1.422 MB / 202.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.000811/0.000811, allocations: 84.33 kB / 328.7 MB, free: 11.75 MB / 266.7 MB Notification: Performance of FrontEnd - loaded program: time 0.0003042/0.0003042, allocations: 12 kB / 397 MB, free: 46.48 MB / 298.7 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.08304/0.08336, allocations: 55.82 MB / 452.9 MB, free: 6.648 MB / 314.7 MB Notification: Performance of FrontEnd - scodeFlatten: time 0.2788/0.3622, allocations: 87.55 MB / 0.5277 GB, free: 12.44 MB / 362.7 MB Notification: Performance of FrontEnd - mkProgramGraph: time 0.0002513/0.3625, allocations: 83.48 kB / 0.5278 GB, free: 12.43 MB / 362.7 MB Notification: Performance of FrontEnd - DAE generated: time 0.06115/0.4236, allocations: 28.46 MB / 0.5556 GB, free: 14.09 MB / 378.7 MB Notification: Performance of FrontEnd: time 1.623e-06/0.4237, allocations: 0 / 0.5556 GB, free: 14.09 MB / 378.7 MB Notification: Performance of Transformations before backend: time 9.586e-05/0.4238, allocations: 43.94 kB / 0.5557 GB, free: 14.04 MB / 378.7 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 369 * Number of variables: 369 Notification: Performance of Generate backend data structure: time 0.004801/0.4286, allocations: 2.044 MB / 0.5577 GB, free: 12.06 MB / 378.7 MB Notification: Performance of prepare preOptimizeDAE: time 3.812e-05/0.4286, allocations: 12.03 kB / 0.5577 GB, free: 12.05 MB / 378.7 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0004327/0.4291, allocations: 193.8 kB / 0.5579 GB, free: 11.86 MB / 378.7 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002889/0.432, allocations: 1.251 MB / 0.5591 GB, free: 10.88 MB / 378.7 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001011/0.4321, allocations: 114.8 kB / 0.5592 GB, free: 10.81 MB / 378.7 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0003143/0.4324, allocations: 167.4 kB / 0.5593 GB, free: 10.7 MB / 378.7 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.003485/0.4359, allocations: 2.172 MB / 0.5615 GB, free: 9.172 MB / 378.7 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.475e-05/0.4359, allocations: 0 / 0.5615 GB, free: 9.172 MB / 378.7 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001735/0.4361, allocations: 64.5 kB / 0.5615 GB, free: 9.156 MB / 378.7 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.621e-05/0.4362, allocations: 32 kB / 0.5616 GB, free: 9.125 MB / 378.7 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002975/0.4391, allocations: 1.838 MB / 0.5634 GB, free: 7.965 MB / 378.7 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.009796/0.4489, allocations: 6.708 MB / 0.5699 GB, free: 2.641 MB / 378.7 MB Notification: Performance of preOpt comSubExp (simulation): time 0.005504/0.4545, allocations: 2.356 MB / 0.5722 GB, free: 0.75 MB / 378.7 MB Notification: Performance of preOpt evalFunc (simulation): time 0.0001025/0.4546, allocations: 25.05 kB / 0.5722 GB, free: 0.7305 MB / 378.7 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.698e-05/0.4547, allocations: 47.88 kB / 0.5723 GB, free: 0.6758 MB / 378.7 MB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0009747/0.4556, allocations: 175.7 kB / 0.5724 GB, free: 0.5078 MB / 378.7 MB Notification: Performance of pre-optimization done (n=134): time 3.366e-06/0.4557, allocations: 0 / 0.5724 GB, free: 0.5078 MB / 378.7 MB Notification: Performance of matching and sorting (n=135): time 0.0132/0.4689, allocations: 6.755 MB / 0.579 GB, free: 9.461 MB / 394.7 MB Notification: Performance of inlineWhenForInitialization (initialization): time 8.245e-05/0.469, allocations: 145.8 kB / 0.5792 GB, free: 9.289 MB / 394.7 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001083/0.4701, allocations: 0.7448 MB / 0.5799 GB, free: 8.523 MB / 394.7 MB Notification: Performance of collectPreVariables (initialization): time 0.0001772/0.4703, allocations: 53.7 kB / 0.58 GB, free: 8.465 MB / 394.7 MB Notification: Performance of collectInitialEqns (initialization): time 0.0004041/0.4707, allocations: 0.6091 MB / 0.5805 GB, free: 7.852 MB / 394.7 MB Notification: Performance of collectInitialBindings (initialization): time 0.0004444/0.4711, allocations: 0.5271 MB / 0.5811 GB, free: 7.328 MB / 394.7 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001105/0.4712, allocations: 28 kB / 0.5811 GB, free: 7.301 MB / 394.7 MB Notification: Performance of setup shared object (initialization): time 0.0001389/0.4714, allocations: 373.9 kB / 0.5814 GB, free: 6.93 MB / 394.7 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001537/0.4729, allocations: 0.9254 MB / 0.5824 GB, free: 6.004 MB / 394.7 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001737/0.4747, allocations: 1.156 MB / 0.5835 GB, free: 4.777 MB / 394.7 MB Notification: The given system is mixed-determined. [index = 1] Notification: Performance of analyzeInitialSystem (initialization): time 0.02328/0.498, allocations: 5.414 MB / 0.5888 GB, free: 15.37 MB / 410.7 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 6.292e-06/0.498, allocations: 0 / 0.5888 GB, free: 15.37 MB / 410.7 MB Notification: Performance of matching and sorting (n=207) (initialization): time 0.007238/0.5053, allocations: 2.996 MB / 0.5917 GB, free: 12.33 MB / 410.7 MB Notification: Performance of prepare postOptimizeDAE: time 0.0005918/0.5059, allocations: 1.572 MB / 0.5932 GB, free: 10.63 MB / 410.7 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.304e-05/0.5059, allocations: 4 kB / 0.5932 GB, free: 10.63 MB / 410.7 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.003077/0.509, allocations: 0.7335 MB / 0.5939 GB, free: 9.863 MB / 410.7 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002393/0.5114, allocations: 475.4 kB / 0.5944 GB, free: 9.398 MB / 410.7 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01255/0.524, allocations: 15.65 MB / 0.6097 GB, free: 8.332 MB / 426.7 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001718/0.5257, allocations: 115.9 kB / 0.6098 GB, free: 8.219 MB / 426.7 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0004056/0.5262, allocations: 59.97 kB / 0.6099 GB, free: 8.16 MB / 426.7 MB Notification: Performance of prepare postOptimizeDAE: time 9.698e-06/0.5262, allocations: 4 kB / 0.6099 GB, free: 8.156 MB / 426.7 MB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.006366/0.5325, allocations: 2.691 MB / 0.6125 GB, free: 5.434 MB / 426.7 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.584e-05/0.5326, allocations: 4 kB / 0.6125 GB, free: 5.43 MB / 426.7 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.002701/0.5353, allocations: 0.6672 MB / 0.6131 GB, free: 4.73 MB / 426.7 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002237/0.5376, allocations: 467.5 kB / 0.6136 GB, free: 4.273 MB / 426.7 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01157/0.5491, allocations: 15.56 MB / 0.6288 GB, free: 3.301 MB / 442.7 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001603/0.5508, allocations: 84.02 kB / 0.6289 GB, free: 3.219 MB / 442.7 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.000337/0.5511, allocations: 67.97 kB / 0.6289 GB, free: 3.152 MB / 442.7 MB Warning: Assuming fixed start value for the following 1 variables: heater.T:VARIABLE(min = max(0.0, max(0.0, 0.0)) start = heater.Tstart unit = "K" fixed = true nominal = 300.0 ) "fluid T" type: Real Warning: The initial conditions are over specified. The following 1 initial equations are redundant, so they are removed from the initialization sytem: $DER.line.fluidStream.w = 0.0. Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 18 * Number of states: 0 () * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (181): * Single equations (assignments): 170 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 11 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 10 {(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1} * Non-linear torn systems: 1 {2 15} Notification: Performance of prepare postOptimizeDAE: time 0.001285/0.5524, allocations: 0.5143 MB / 0.6294 GB, free: 2.629 MB / 442.7 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0003731/0.5528, allocations: 122.5 kB / 0.6295 GB, free: 2.508 MB / 442.7 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.005536/0.5584, allocations: 2.616 MB / 0.6321 GB, free: 15.84 MB / 458.7 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.218e-05/0.5584, allocations: 12 kB / 0.6321 GB, free: 15.83 MB / 458.7 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.651e-05/0.5584, allocations: 7.953 kB / 0.6321 GB, free: 15.82 MB / 458.7 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.547e-05/0.5584, allocations: 7.969 kB / 0.6321 GB, free: 15.81 MB / 458.7 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.008763/0.5672, allocations: 4.763 MB / 0.6368 GB, free: 10.98 MB / 458.7 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.24e-06/0.5672, allocations: 0 / 0.6368 GB, free: 10.98 MB / 458.7 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.002606/0.5698, allocations: 447.6 kB / 0.6372 GB, free: 10.55 MB / 458.7 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.002348/0.5722, allocations: 0.6462 MB / 0.6378 GB, free: 9.863 MB / 458.7 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0002284/0.5725, allocations: 71.95 kB / 0.6379 GB, free: 9.793 MB / 458.7 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.01308/0.5855, allocations: 17.04 MB / 0.6545 GB, free: 7.238 MB / 474.7 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.346e-06/0.5856, allocations: 3.953 kB / 0.6545 GB, free: 7.234 MB / 474.7 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.007049/0.5926, allocations: 3.451 MB / 0.6579 GB, free: 3.723 MB / 474.7 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0004253/0.5931, allocations: 203.5 kB / 0.6581 GB, free: 3.504 MB / 474.7 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0003471/0.5934, allocations: 68.34 kB / 0.6582 GB, free: 3.438 MB / 474.7 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00119/0.5946, allocations: 99.75 kB / 0.6583 GB, free: 3.34 MB / 474.7 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0003072/0.595, allocations: 113.1 kB / 0.6584 GB, free: 3.23 MB / 474.7 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001232/0.5951, allocations: 43.97 kB / 0.6584 GB, free: 3.188 MB / 474.7 MB Notification: Performance of sorting global known variables: time 0.0009508/0.5961, allocations: 0.5821 MB / 0.659 GB, free: 2.594 MB / 474.7 MB Notification: Performance of sort global known variables: time 1.6e-07/0.5961, allocations: 4 kB / 0.659 GB, free: 2.59 MB / 474.7 MB Notification: Performance of remove unused functions: time 0.002837/0.5989, allocations: 0.8242 MB / 0.6598 GB, free: 1.766 MB / 474.7 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 2 * Number of states: 47 (FlowCtrl.y,PI_dpHC.FO.y,line.fluidStream.T[1],line.fluidStream.T[2],line.fluidStream.T[3],line.fluidStream.T[4],line.fluidStream.T[5],line.wall.wall.T[1,1],line.wall.wall.T[1,2],line.wall.wall.T[1,3],line.wall.wall.T[2,1],line.wall.wall.T[2,2],line.wall.wall.T[2,3],line.wall.wall.T[3,1],line.wall.wall.T[3,2],line.wall.wall.T[3,3],line.wall.wall.T[4,1],line.wall.wall.T[4,2],line.wall.wall.T[4,3],line.wall.wall.T[5,1],line.wall.wall.T[5,2],line.wall.wall.T[5,3],load.fluidStream.w,load.fluidStream.T[1],load.fluidStream.T[2],load.fluidStream.T[3],load.fluidStream.T[4],load.fluidStream.T[5],load.wall.wall.T[1,1],load.wall.wall.T[1,2],load.wall.wall.T[1,3],load.wall.wall.T[2,1],load.wall.wall.T[2,2],load.wall.wall.T[2,3],load.wall.wall.T[3,1],load.wall.wall.T[3,2],load.wall.wall.T[3,3],load.wall.wall.T[4,1],load.wall.wall.T[4,2],load.wall.wall.T[4,3],load.wall.wall.T[5,1],load.wall.wall.T[5,2],load.wall.wall.T[5,3],EV.lfrac,PI_To.FO.y,PI_wh.FO.y,heater.T) * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (125): * Single equations (assignments): 112 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 1 * Torn equation systems: 12 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 0 * Non-linear Jacobian: 1 {1} * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 11 {(1,100.0%) 5,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1,(1,100.0%) 1} * Non-linear torn systems: 1 {2 11} Notification: Performance of Backend phase and start with SimCode phase: time 0.0003848/0.5993, allocations: 192.7 kB / 0.66 GB, free: 1.566 MB / 474.7 MB Notification: Performance of simCode: created initialization part: time 0.008429/0.6077, allocations: 5.742 MB / 0.6656 GB, free: 11.57 MB / 490.7 MB Notification: Performance of simCode: created event and clocks part: time 3.606e-06/0.6078, allocations: 0 / 0.6656 GB, free: 11.57 MB / 490.7 MB Notification: Performance of simCode: created simulation system equations: time 0.003346/0.6111, allocations: 2.372 MB / 0.6679 GB, free: 9.059 MB / 490.7 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001421/0.6126, allocations: 390.6 kB / 0.6683 GB, free: 8.68 MB / 490.7 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01052/0.6231, allocations: 7.441 MB / 0.6755 GB, free: 1.199 MB / 490.7 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.1685/0.7916, allocations: 1.43 MB / 0.6769 GB, free: 143.8 MB / 490.7 MB Notification: Performance of simCode: alias equations: time 0.002277/0.7939, allocations: 0.6349 MB / 0.6776 GB, free: 143.8 MB / 490.7 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0004591/0.7943, allocations: 109.5 kB / 0.6777 GB, free: 143.7 MB / 490.7 MB Notification: Performance of SimCode: time 6.41e-07/0.7943, allocations: 0 / 0.6777 GB, free: 143.7 MB / 490.7 MB Notification: Performance of Templates: time 0.04107/0.8354, allocations: 30.6 MB / 0.7076 GB, free: 142.1 MB / 490.7 MB make -j1 -f AES_AES.Coursework.ThermSys_Generation.Hcentral_control_case_002.makefile (rm -f AES_AES.Coursework.ThermSys_Generation.Hcentral_control_case_002.pipe ; mkfifo AES_AES.Coursework.ThermSys_Generation.Hcentral_control_case_002.pipe ; head -c 1048576 < AES_AES.Coursework.ThermSys_Generation.Hcentral_control_case_002.pipe >> ../files/AES_AES.Coursework.ThermSys_Generation.Hcentral_control_case_002.sim & ./AES_AES.Coursework.ThermSys_Generation.Hcentral_control_case_002 -lv=LOG_STATS -s=dassl -abortSlowSimulation -alarm=480 -lv LOG_STATS > AES_AES.Coursework.ThermSys_Generation.Hcentral_control_case_002.pipe 2>&1)