Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ModelicaTest_3.2.1_ModelicaTest.MultiBody.Forces.Spring2.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 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.1+maint.om/package.mo", uses=false) Using package ModelicaTest with version 3.2.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.1+maint.om/package.mo) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+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(ModelicaTest.MultiBody.Forces.Spring2,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ModelicaTest_3.2.1_ModelicaTest.MultiBody.Forces.Spring2") translateModel(ModelicaTest.MultiBody.Forces.Spring2,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ModelicaTest_3.2.1_ModelicaTest.MultiBody.Forces.Spring2") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.006717/0.006716, allocations: 99.73 kB / 15.73 MB, free: 6.043 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001421/0.001421, allocations: 194.5 kB / 16.68 MB, free: 5.961 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.577/1.577, allocations: 205.1 MB / 222.6 MB, free: 4.527 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.1+maint.om/package.mo): time 0.3556/0.3556, allocations: 37.99 MB / 307.9 MB, free: 10.1 MB / 254.1 MB Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: ModelicaTest requested package Modelica of version 3.2.1. Modelica 3.2.3 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.002535/0.002535, allocations: 71.84 kB / 433 MB, free: 5.402 MB / 366.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.367/0.3695, allocations: 56.47 MB / 489.5 MB, free: 19.86 MB / 382.1 MB Notification: Performance of NFInst.instantiate(ModelicaTest.MultiBody.Forces.Spring2): time 0.01152/0.3811, allocations: 12.5 MB / 0.4902 GB, free: 10.94 MB / 382.1 MB Notification: Performance of NFInst.instExpressions: time 0.01086/0.392, allocations: 4.339 MB / 0.4944 GB, free: 8.043 MB / 382.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.00461/0.3966, allocations: 76.09 kB / 0.4945 GB, free: 8.027 MB / 382.1 MB Notification: Performance of NFTyping.typeComponents: time 0.00699/0.4037, allocations: 2.901 MB / 0.4974 GB, free: 6.664 MB / 382.1 MB Notification: Performance of NFTyping.typeBindings: time 0.00845/0.4122, allocations: 2.143 MB / 0.4994 GB, free: 5.664 MB / 382.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.003121/0.4153, allocations: 0.9387 MB / 0.5004 GB, free: 5.156 MB / 382.1 MB Notification: Performance of NFFlatten.flatten: time 0.01076/0.4261, allocations: 5.474 MB / 0.5057 GB, free: 2.312 MB / 382.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.007137/0.4333, allocations: 4.028 MB / 0.5096 GB, free: 15.96 MB / 398.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.005705/0.439, allocations: 1.845 MB / 0.5114 GB, free: 14.91 MB / 398.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.005288/0.4443, allocations: 2.592 MB / 0.514 GB, free: 13.36 MB / 398.1 MB Notification: Performance of NFPackage.collectConstants: time 0.002159/0.4465, allocations: 384.1 kB / 0.5143 GB, free: 13.36 MB / 398.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.0046/0.4511, allocations: 1.227 MB / 0.5155 GB, free: 12.89 MB / 398.1 MB Notification: Performance of NFScalarize.scalarize: time 0.003983/0.4551, allocations: 2.325 MB / 0.5178 GB, free: 10.63 MB / 398.1 MB Notification: Performance of NFVerifyModel.verify: time 0.00613/0.4613, allocations: 2.61 MB / 0.5204 GB, free: 8.008 MB / 398.1 MB Notification: Performance of NFConvertDAE.convert: time 0.01245/0.4738, allocations: 7.992 MB / 0.5282 GB, free: 15.98 MB / 414.1 MB Notification: Performance of FrontEnd - DAE generated: time 8.145e-06/0.4738, allocations: 0 / 0.5282 GB, free: 15.98 MB / 414.1 MB Notification: Performance of FrontEnd: time 3.046e-06/0.4738, allocations: 0 / 0.5282 GB, free: 15.98 MB / 414.1 MB Notification: Performance of Transformations before backend: time 0.0002914/0.4741, allocations: 0 / 0.5282 GB, free: 15.98 MB / 414.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 1730 * Number of variables: 1730 Notification: Performance of Generate backend data structure: time 0.01471/0.4889, allocations: 5.879 MB / 0.5339 GB, free: 10.04 MB / 414.1 MB Notification: Performance of prepare preOptimizeDAE: time 5.701e-05/0.4889, allocations: 11.89 kB / 0.5339 GB, free: 10.03 MB / 414.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.008877/0.4978, allocations: 2.287 MB / 0.5361 GB, free: 7.73 MB / 414.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.005947/0.5038, allocations: 3 MB / 0.5391 GB, free: 4.672 MB / 414.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0002454/0.5041, allocations: 291.5 kB / 0.5394 GB, free: 4.387 MB / 414.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.001551/0.5056, allocations: 0.5968 MB / 0.5399 GB, free: 3.789 MB / 414.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.02411/0.5297, allocations: 12.12 MB / 0.5518 GB, free: 6.855 MB / 430.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 0.0002452/0.53, allocations: 47.53 kB / 0.5518 GB, free: 6.809 MB / 430.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.001354/0.5314, allocations: 179.8 kB / 0.552 GB, free: 6.633 MB / 430.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.003288/0.5347, allocations: 2.139 MB / 0.5541 GB, free: 4.484 MB / 430.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.02432/0.559, allocations: 10.74 MB / 0.5646 GB, free: 9.734 MB / 446.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.07018/0.6293, allocations: 47.62 MB / 0.6111 GB, free: 8.875 MB / 494.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.01501/0.6443, allocations: 5.388 MB / 0.6163 GB, free: 3.316 MB / 494.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.004029/0.6484, allocations: 2.502 MB / 0.6188 GB, free: 0.8008 MB / 494.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.02074/0.6691, allocations: 12.31 MB / 0.6308 GB, free: 3.945 MB / 0.4981 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 6.317e-05/0.6692, allocations: 63.8 kB / 0.6309 GB, free: 3.871 MB / 0.4981 GB Notification: Performance of pre-optimization done (n=219): time 5.069e-06/0.6693, allocations: 3.938 kB / 0.6309 GB, free: 3.867 MB / 0.4981 GB Notification: Performance of matching and sorting (n=258): time 0.3499/1.019, allocations: 25.11 MB / 0.6554 GB, free: 119.8 MB / 0.4981 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.002934/1.022, allocations: 4.892 MB / 0.6602 GB, free: 114.9 MB / 0.4981 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.008377/1.031, allocations: 4.566 MB / 0.6646 GB, free: 113.3 MB / 0.4981 GB Notification: Performance of collectPreVariables (initialization): time 0.0009889/1.032, allocations: 63.17 kB / 0.6647 GB, free: 113.2 MB / 0.4981 GB Notification: Performance of collectInitialEqns (initialization): time 0.002332/1.034, allocations: 3.522 MB / 0.6681 GB, free: 110.5 MB / 0.4981 GB Notification: Performance of collectInitialBindings (initialization): time 0.001662/1.036, allocations: 1.021 MB / 0.6691 GB, free: 109.8 MB / 0.4981 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.002623/1.038, allocations: 1.539 MB / 0.6706 GB, free: 109.1 MB / 0.4981 GB Notification: Performance of setup shared object (initialization): time 5.528e-05/1.038, allocations: 302.4 kB / 0.6709 GB, free: 108.8 MB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.005291/1.044, allocations: 3.284 MB / 0.6741 GB, free: 107.7 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.009351/1.053, allocations: 7.608 MB / 0.6815 GB, free: 100.7 MB / 0.4981 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.01169/1.065, allocations: 11.48 MB / 0.6927 GB, free: 91.19 MB / 0.4981 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 0.0001216/1.065, allocations: 42.56 kB / 0.6928 GB, free: 91.19 MB / 0.4981 GB Notification: Performance of matching and sorting (n=1003) (initialization): time 0.04019/1.105, allocations: 16.2 MB / 0.7086 GB, free: 76.71 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 9.26e-05/1.105, allocations: 68 kB / 0.7087 GB, free: 76.64 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.02708/1.132, allocations: 9.464 MB / 0.7179 GB, free: 67.12 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.02706/1.159, allocations: 6.648 MB / 0.7244 GB, free: 60.42 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.005639/1.165, allocations: 1.712 MB / 0.7261 GB, free: 58.71 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.02605/1.191, allocations: 24.17 MB / 0.7497 GB, free: 33.57 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.007521/1.199, allocations: 0.6628 MB / 0.7503 GB, free: 32.91 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.001295/1.2, allocations: 464 kB / 0.7508 GB, free: 32.45 MB / 0.4981 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 688 * Number of states: 0 () * Number of discrete variables: 45 (fixedTranslation1.color[3],fixedTranslation1.color[2],fixedTranslation1.color[1],body2.sphereColor[3],body2.sphereColor[2],body2.sphereColor[1],spring2.massColor[3],spring2.massColor[2],spring2.massColor[1],spring2.color[3],spring2.color[2],spring2.color[1],body1.sphereColor[3],body1.sphereColor[2],body1.sphereColor[1],body.sphereColor[3],body.sphereColor[2],body.sphereColor[1],spring1.color[3],spring1.color[2],spring1.color[1],spring1.massColor[3],spring1.massColor[2],spring1.massColor[1],spring.color[3],spring.color[2],spring.color[1],spring.massColor[3],spring.massColor[2],spring.massColor[1],fixedTranslation.color[3],fixedTranslation.color[2],fixedTranslation.color[1],world.gravityArrowColor[3],world.gravityArrowColor[2],world.gravityArrowColor[1],world.axisColor_x[3],world.axisColor_x[2],world.axisColor_x[1],world.groundColor[3],world.groundColor[2],world.groundColor[1],world.gravitySphereColor[3],world.gravitySphereColor[2],world.gravitySphereColor[1]) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (923): * Single equations (assignments): 902 * Array equations: 9 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 8 * Torn equation systems: 4 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 5 systems {(4,100.0%), (4,100.0%), (3,100.0%), (4,100.0%), (3,100.0%)} * Non-linear Jacobian (size): 3 systems {4, 4, 4} * Without analytic Jacobian (size): 0 systems Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 4 systems {(1,1,100.0%), (5,13,100.0%), (2,1,100.0%), (2,1,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.004132/1.204, allocations: 2.344 MB / 0.7531 GB, free: 30.1 MB / 0.4981 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001028/1.205, allocations: 418.7 kB / 0.7535 GB, free: 29.69 MB / 0.4981 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01257/1.218, allocations: 7.194 MB / 0.7605 GB, free: 22.42 MB / 0.4981 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 0.01137/1.229, allocations: 6.557 MB / 0.7669 GB, free: 15.8 MB / 0.4981 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.911e-05/1.229, allocations: 11.94 kB / 0.7669 GB, free: 15.79 MB / 0.4981 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.254e-05/1.229, allocations: 11.95 kB / 0.7669 GB, free: 15.78 MB / 0.4981 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.02547/1.255, allocations: 15.49 MB / 0.782 GB, free: 148 kB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.323e-05/1.255, allocations: 11.94 kB / 0.7821 GB, free: 136 kB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001996/1.257, allocations: 444 kB / 0.7825 GB, free: 15.7 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.01014/1.267, allocations: 3.373 MB / 0.7858 GB, free: 12.29 MB / 0.5137 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0005586/1.268, allocations: 89.64 kB / 0.7859 GB, free: 12.2 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0207/1.288, allocations: 19.15 MB / 0.8046 GB, free: 8.094 MB / 0.5294 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 0.003277/1.292, allocations: 4.689 MB / 0.8091 GB, free: 2.957 MB / 0.5294 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.02034/1.312, allocations: 10.75 MB / 0.8196 GB, free: 8.023 MB / 0.545 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001926/1.314, allocations: 479.7 kB / 0.8201 GB, free: 7.531 MB / 0.545 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0009657/1.315, allocations: 67.98 kB / 0.8202 GB, free: 7.465 MB / 0.545 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002631/1.318, allocations: 295.5 kB / 0.8204 GB, free: 7.176 MB / 0.545 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0007211/1.318, allocations: 205.5 kB / 0.8206 GB, free: 6.973 MB / 0.545 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0002304/1.319, allocations: 91.89 kB / 0.8207 GB, free: 6.883 MB / 0.545 GB Notification: Performance of sorting global known variables: time 0.004801/1.323, allocations: 2.839 MB / 0.8235 GB, free: 4.043 MB / 0.545 GB Notification: Performance of sort global known variables: time 3.31e-07/1.323, allocations: 0 / 0.8235 GB, free: 4.043 MB / 0.545 GB Notification: Performance of remove unused functions: time 0.008954/1.332, allocations: 1.599 MB / 0.8251 GB, free: 2.453 MB / 0.545 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 25 * Number of states: 36 ($STATESET3.x[3],$STATESET3.x[2],$STATESET3.x[1],$STATESET2.x[3],$STATESET2.x[2],$STATESET2.x[1],$STATESET1.x[3],$STATESET1.x[2],$STATESET1.x[1],body.frame_a.r_0[1],body.frame_a.r_0[2],body.frame_a.r_0[3],body.v_0[1],body.v_0[2],body.v_0[3],body.w_a[1],body.w_a[2],body.w_a[3],body1.frame_a.r_0[1],body1.frame_a.r_0[2],body1.frame_a.r_0[3],body1.v_0[1],body1.v_0[2],body1.v_0[3],body1.w_a[1],body1.w_a[2],body1.w_a[3],body2.frame_a.r_0[1],body2.frame_a.r_0[2],body2.frame_a.r_0[3],body2.v_0[1],body2.v_0[2],body2.v_0[3],body2.w_a[1],body2.w_a[2],body2.w_a[3]) * 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 (195): * Single equations (assignments): 180 * Array equations: 3 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 8 * Torn equation systems: 4 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 5 systems {(4,100.0%), (3,100.0%), (4,100.0%), (3,100.0%), (4,100.0%)} * Non-linear Jacobian (size): 3 systems {4, 4, 4} * Without analytic Jacobian (size): 0 systems Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 4 systems {(1,1,100.0%), (5,8,100.0%), (2,1,100.0%), (2,1,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.0007734/1.333, allocations: 207.9 kB / 0.8253 GB, free: 2.246 MB / 0.545 GB Notification: Performance of simCode: created initialization part: time 0.01899/1.352, allocations: 9.855 MB / 0.8349 GB, free: 8.219 MB / 0.5606 GB Notification: Performance of simCode: created event and clocks part: time 1.49e-05/1.352, allocations: 0 / 0.8349 GB, free: 8.219 MB / 0.5606 GB Notification: Performance of simCode: created simulation system equations: time 0.0104/1.363, allocations: 4.796 MB / 0.8396 GB, free: 3.223 MB / 0.5606 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.007261/1.37, allocations: 0.5671 MB / 0.8401 GB, free: 2.66 MB / 0.5606 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.03046/1.4, allocations: 13.31 MB / 0.8531 GB, free: 5.254 MB / 0.5762 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.006077/1.406, allocations: 3.725 MB / 0.8567 GB, free: 1.504 MB / 0.5762 GB Notification: Performance of simCode: alias equations: time 0.2641/1.671, allocations: 2.236 MB / 0.8589 GB, free: 180.9 MB / 0.5762 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001744/1.672, allocations: 308.8 kB / 0.8592 GB, free: 180.9 MB / 0.5762 GB Notification: Performance of SimCode: time 2.444e-06/1.672, allocations: 0 / 0.8592 GB, free: 180.9 MB / 0.5762 GB Notification: Performance of Templates: time 0.1872/1.86, allocations: 64.37 MB / 0.9221 GB, free: 153.4 MB / 0.5762 GB make -j1 -f ModelicaTest_3.2.1_ModelicaTest.MultiBody.Forces.Spring2.makefile (rm -f ModelicaTest_3.2.1_ModelicaTest.MultiBody.Forces.Spring2.pipe ; mkfifo ModelicaTest_3.2.1_ModelicaTest.MultiBody.Forces.Spring2.pipe ; head -c 1048576 < ModelicaTest_3.2.1_ModelicaTest.MultiBody.Forces.Spring2.pipe >> ../files/ModelicaTest_3.2.1_ModelicaTest.MultiBody.Forces.Spring2.sim & ./ModelicaTest_3.2.1_ModelicaTest.MultiBody.Forces.Spring2 -abortSlowSimulation -alarm=480 -lv LOG_STATS > ModelicaTest_3.2.1_ModelicaTest.MultiBody.Forces.Spring2.pipe 2>&1)