Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.0.0-master/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 Buildings with version 10.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.0.0-master/package.mo) Running command: translateModel(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9") translateModel(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9,tolerance=1e-06,outputFormat="empty",numberOfIntervals=172800,variableFilter="",fileNamePrefix="Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 10.0.0-master/package.mo): time 2.05/2.05, allocations: 391.2 MB / 407 MB, free: 10.83 MB / 314.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001335/0.001335, allocations: 193.6 kB / 499.1 MB, free: 4.617 MB / 394.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.282/1.282, allocations: 222.9 MB / 0.7948 GB, free: 15.87 MB / 0.5573 GB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001002/0.001002, allocations: 107.6 kB / 0.9329 GB, free: 7.094 MB / 0.6823 GB Notification: Performance of FrontEnd - loaded program: time 0.001049/0.001049, allocations: 51.42 kB / 1.081 GB, free: 218.4 MB / 0.823 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2081/0.2092, allocations: 140.6 MB / 1.218 GB, free: 117.3 MB / 0.823 GB Notification: Performance of NFInst.instantiate(Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9): time 0.1184/0.3276, allocations: 155.7 MB / 1.37 GB, free: 8.973 MB / 0.8698 GB Notification: Performance of NFInst.instExpressions: time 0.0231/0.3508, allocations: 22.2 MB / 1.392 GB, free: 2.715 MB / 0.8855 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001852/0.3527, allocations: 51.69 kB / 1.392 GB, free: 2.664 MB / 0.8855 GB Notification: Performance of NFTyping.typeComponents: time 0.003007/0.3557, allocations: 3.162 MB / 1.395 GB, free: 15.5 MB / 0.9011 GB Notification: Performance of NFTyping.typeBindings: time 0.002427/0.3581, allocations: 1.948 MB / 1.397 GB, free: 13.54 MB / 0.9011 GB Notification: Performance of NFTyping.typeClassSections: time 0.001715/0.3599, allocations: 0.6953 MB / 1.398 GB, free: 12.86 MB / 0.9011 GB Notification: Performance of NFFlatten.flatten: time 0.002875/0.3628, allocations: 2.624 MB / 1.4 GB, free: 10.22 MB / 0.9011 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001652/0.3644, allocations: 1.341 MB / 1.401 GB, free: 8.863 MB / 0.9011 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001252/0.3657, allocations: 1.137 MB / 1.403 GB, free: 7.723 MB / 0.9011 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001995/0.3677, allocations: 2.228 MB / 1.405 GB, free: 5.488 MB / 0.9011 GB Notification: Performance of NFPackage.collectConstants: time 0.0001736/0.3679, allocations: 72 kB / 1.405 GB, free: 5.418 MB / 0.9011 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0003392/0.3682, allocations: 112 kB / 1.405 GB, free: 5.309 MB / 0.9011 GB Notification: Performance of NFScalarize.scalarize: time 0.0005702/0.3688, allocations: 0.7813 MB / 1.406 GB, free: 4.523 MB / 0.9011 GB Notification: Performance of NFVerifyModel.verify: time 0.0007779/0.3696, allocations: 1.054 MB / 1.407 GB, free: 3.461 MB / 0.9011 GB Notification: Performance of NFConvertDAE.convert: time 0.00178/0.3714, allocations: 2.51 MB / 1.409 GB, free: 0.9414 MB / 0.9011 GB Notification: Performance of FrontEnd - DAE generated: time 4.449e-06/0.3714, allocations: 0 / 1.409 GB, free: 0.9414 MB / 0.9011 GB Notification: Performance of FrontEnd: time 1.203e-06/0.3714, allocations: 0 / 1.409 GB, free: 0.9414 MB / 0.9011 GB Notification: Performance of Transformations before backend: time 2.304e-05/0.3715, allocations: 0 / 1.409 GB, free: 0.9414 MB / 0.9011 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 214 * Number of variables: 214 Notification: Performance of Generate backend data structure: time 0.004166/0.3756, allocations: 3.247 MB / 1.412 GB, free: 13.62 MB / 0.9167 GB Notification: Performance of prepare preOptimizeDAE: time 3.643e-05/0.3757, allocations: 15.98 kB / 1.412 GB, free: 13.61 MB / 0.9167 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0003498/0.376, allocations: 336.6 kB / 1.413 GB, free: 13.28 MB / 0.9167 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.00177/0.3778, allocations: 1.404 MB / 1.414 GB, free: 11.82 MB / 0.9167 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.00014/0.378, allocations: 103.7 kB / 1.414 GB, free: 11.71 MB / 0.9167 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001251/0.3781, allocations: 88 kB / 1.414 GB, free: 11.62 MB / 0.9167 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001703/0.3798, allocations: 1.02 MB / 1.415 GB, free: 10.59 MB / 0.9167 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.453e-05/0.3798, allocations: 0 / 1.415 GB, free: 10.59 MB / 0.9167 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 7.634e-05/0.3799, allocations: 32 kB / 1.415 GB, free: 10.56 MB / 0.9167 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.942e-05/0.3799, allocations: 24 kB / 1.415 GB, free: 10.54 MB / 0.9167 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001487/0.3814, allocations: 0.851 MB / 1.416 GB, free: 9.684 MB / 0.9167 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.006302/0.3877, allocations: 4.559 MB / 1.421 GB, free: 4.855 MB / 0.9167 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001825/0.3896, allocations: 0.9906 MB / 1.421 GB, free: 3.859 MB / 0.9167 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.000905/0.3905, allocations: 0.549 MB / 1.422 GB, free: 3.312 MB / 0.9167 GB Notification: Performance of preOpt evalFunc (simulation): time 6.56e-05/0.3906, allocations: 16.98 kB / 1.422 GB, free: 3.293 MB / 0.9167 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.000983/0.3916, allocations: 0.5984 MB / 1.423 GB, free: 2.684 MB / 0.9167 GB Notification: Performance of pre-optimization done (n=101): time 3.086e-06/0.3916, allocations: 0 / 1.423 GB, free: 2.684 MB / 0.9167 GB Notification: Performance of matching and sorting (n=101): time 0.004779/0.3964, allocations: 2.327 MB / 1.425 GB, free: 312 kB / 0.9167 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.596e-05/0.3965, allocations: 68.41 kB / 1.425 GB, free: 228 kB / 0.9167 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.3961/0.7926, allocations: 5.089 MB / 1.43 GB, free: 205.4 MB / 0.9167 GB Notification: Performance of collectPreVariables (initialization): time 0.0001845/0.7928, allocations: 51.27 kB / 1.43 GB, free: 205.4 MB / 0.9167 GB Notification: Performance of collectInitialEqns (initialization): time 0.000868/0.7937, allocations: 1.377 MB / 1.431 GB, free: 204.4 MB / 0.9167 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002554/0.794, allocations: 321.4 kB / 1.432 GB, free: 204.3 MB / 0.9167 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002521/0.7942, allocations: 177.4 kB / 1.432 GB, free: 204.3 MB / 0.9167 GB Notification: Performance of setup shared object (initialization): time 6.611e-05/0.7943, allocations: 347.2 kB / 1.432 GB, free: 203.9 MB / 0.9167 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0008492/0.7952, allocations: 426.7 kB / 1.433 GB, free: 203.8 MB / 0.9167 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0009181/0.7961, allocations: 0.5971 MB / 1.433 GB, free: 203.5 MB / 0.9167 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001503/0.7976, allocations: 0.9953 MB / 1.434 GB, free: 203 MB / 0.9167 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.269e-06/0.7976, allocations: 1.875 kB / 1.434 GB, free: 203 MB / 0.9167 GB Notification: Performance of matching and sorting (n=130) (initialization): time 0.002712/0.8003, allocations: 1.612 MB / 1.436 GB, free: 202.4 MB / 0.9167 GB Notification: Performance of prepare postOptimizeDAE: time 1.728e-05/0.8004, allocations: 9.125 kB / 1.436 GB, free: 202.4 MB / 0.9167 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.387e-06/0.8004, allocations: 2.969 kB / 1.436 GB, free: 202.4 MB / 0.9167 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0006428/0.801, allocations: 267.1 kB / 1.436 GB, free: 202.3 MB / 0.9167 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006681/0.8017, allocations: 186 kB / 1.436 GB, free: 202.3 MB / 0.9167 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003854/0.8056, allocations: 4.366 MB / 1.44 GB, free: 198.9 MB / 0.9167 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0009916/0.8066, allocations: 152.9 kB / 1.441 GB, free: 198.8 MB / 0.9167 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.628e-05/0.8067, allocations: 36.92 kB / 1.441 GB, free: 198.8 MB / 0.9167 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 16 * Number of states: 0 () * Number of discrete variables: 41 (assEqu.nFai,$PRE.assEqu.nFai,$whenCondition9,$PRE.intGai.nextTimeEvent,$whenCondition8,$PRE.reference.nextTimeEvent,$whenCondition7,$PRE.outdoorTemp.nextTimeEvent,$whenCondition6,$PRE.tableSolRadWindow.nextTimeEvent,$whenCondition5,$PRE.tableSolRadWall.nextTimeEvent,$whenCondition4,$PRE.HSky.nextTimeEvent,$whenCondition3,$whenCondition1,mean.y_last,$PRE.mean.y_last,assEqu.satisfied,$PRE.assEqu.satisfied,reference.nextTimeEventScaled,$PRE.reference.nextTimeEventScaled,reference.nextTimeEvent,$whenCondition2,HSky.nextTimeEventScaled,$PRE.HSky.nextTimeEventScaled,HSky.nextTimeEvent,tableSolRadWall.nextTimeEventScaled,$PRE.tableSolRadWall.nextTimeEventScaled,tableSolRadWall.nextTimeEvent,greaterThreshold2.y,greaterThreshold1.y,tableSolRadWindow.nextTimeEventScaled,$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 (108): * Single equations (assignments): 106 * 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 0.001133/0.8078, allocations: 0.8533 MB / 1.441 GB, free: 198.5 MB / 0.9167 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002849/0.8081, allocations: 311.4 kB / 1.442 GB, free: 198.3 MB / 0.9167 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0005065/0.8086, allocations: 390.2 kB / 1.442 GB, free: 198.2 MB / 0.9167 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 7.414e-06/0.8086, allocations: 10.19 kB / 1.442 GB, free: 198.2 MB / 0.9167 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.623e-05/0.8086, allocations: 4.578 kB / 1.442 GB, free: 198.2 MB / 0.9167 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.224e-05/0.8087, allocations: 9.469 kB / 1.442 GB, free: 198.2 MB / 0.9167 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.00471/0.8134, allocations: 3.229 MB / 1.445 GB, free: 196.9 MB / 0.9167 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.24e-06/0.8134, allocations: 1.156 kB / 1.445 GB, free: 196.9 MB / 0.9167 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004866/0.8139, allocations: 115.8 kB / 1.445 GB, free: 196.8 MB / 0.9167 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.000655/0.8146, allocations: 248.2 kB / 1.446 GB, free: 196.8 MB / 0.9167 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 8.831e-05/0.8147, allocations: 29.47 kB / 1.446 GB, free: 196.8 MB / 0.9167 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.003703/0.8184, allocations: 4.353 MB / 1.45 GB, free: 193.3 MB / 0.9167 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.184e-06/0.8184, allocations: 4.625 kB / 1.45 GB, free: 193.3 MB / 0.9167 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.02016/0.8385, allocations: 16.48 MB / 1.466 GB, free: 181.4 MB / 0.9167 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005803/0.8392, allocations: 428.9 kB / 1.466 GB, free: 180.9 MB / 0.9167 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001663/0.8393, allocations: 23.06 kB / 1.466 GB, free: 180.9 MB / 0.9167 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0005705/0.8399, allocations: 64.56 kB / 1.466 GB, free: 180.9 MB / 0.9167 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002303/0.8402, allocations: 100.8 kB / 1.467 GB, free: 180.8 MB / 0.9167 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.358e-05/0.8402, allocations: 35.98 kB / 1.467 GB, free: 180.7 MB / 0.9167 GB Notification: Performance of sorting global known variables: time 0.002763/0.843, allocations: 3.73 MB / 1.47 GB, free: 177 MB / 0.9167 GB Notification: Performance of sort global known variables: time 9e-08/0.843, allocations: 0 / 1.47 GB, free: 177 MB / 0.9167 GB Notification: Performance of remove unused functions: time 0.0014/0.8444, allocations: 0.5573 MB / 1.471 GB, free: 176.4 MB / 0.9167 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: 26 ($whenCondition9,$whenCondition8,$whenCondition7,$whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,intGai.nextTimeEvent,intGai.nextTimeEventScaled,reference.nextTimeEvent,reference.nextTimeEventScaled,outdoorTemp.nextTimeEvent,outdoorTemp.nextTimeEventScaled,tableSolRadWindow.nextTimeEvent,tableSolRadWindow.nextTimeEventScaled,greaterThreshold1.y,greaterThreshold2.y,tableSolRadWall.nextTimeEvent,tableSolRadWall.nextTimeEventScaled,HSky.nextTimeEvent,HSky.nextTimeEventScaled,assEqu.satisfied,assEqu.nFai,mean.y_last) * Number of discrete states: 15 (intGai.nextTimeEvent,reference.nextTimeEvent,outdoorTemp.nextTimeEvent,tableSolRadWindow.nextTimeEvent,tableSolRadWall.nextTimeEvent,HSky.nextTimeEvent,mean.x,assEqu.satisfied,assEqu.nFai,HSky.nextTimeEventScaled,tableSolRadWall.nextTimeEventScaled,tableSolRadWindow.nextTimeEventScaled,outdoorTemp.nextTimeEventScaled,reference.nextTimeEventScaled,intGai.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (79): * Single equations (assignments): 63 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 14 * 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 0.0009526/0.8454, allocations: 0.491 MB / 1.471 GB, free: 176.2 MB / 0.9167 GB Notification: Performance of simCode: created initialization part: time 0.002029/0.8474, allocations: 1.364 MB / 1.473 GB, free: 174.8 MB / 0.9167 GB Notification: Performance of simCode: created event and clocks part: time 2.825e-06/0.8474, allocations: 0 / 1.473 GB, free: 174.8 MB / 0.9167 GB Notification: Performance of simCode: created simulation system equations: time 0.001029/0.8485, allocations: 0.8525 MB / 1.473 GB, free: 173.9 MB / 0.9167 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001497/0.85, allocations: 359.6 kB / 1.474 GB, free: 173.6 MB / 0.9167 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.006416/0.8564, allocations: 7.682 MB / 1.481 GB, free: 165.8 MB / 0.9167 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001052/0.8575, allocations: 1.988 MB / 1.483 GB, free: 163.8 MB / 0.9167 GB Notification: Performance of simCode: alias equations: time 0.0006096/0.8581, allocations: 236.5 kB / 1.483 GB, free: 163.6 MB / 0.9167 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002241/0.8583, allocations: 99.41 kB / 1.484 GB, free: 163.5 MB / 0.9167 GB Notification: Performance of SimCode: time 7.11e-07/0.8583, allocations: 0 / 1.484 GB, free: 163.5 MB / 0.9167 GB Notification: Performance of Templates: time 0.02984/0.8882, allocations: 21.24 MB / 1.504 GB, free: 142.5 MB / 0.9167 GB make -j1 -f Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9.makefile (rm -f Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9.pipe ; mkfifo Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9.pipe ; head -c 1048576 < Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9.pipe >> ../files/Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9.sim & ./Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9 -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_latest_Buildings.ThermalZones.ReducedOrder.Validation.VDI6007.TestCase9.pipe 2>&1)