Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ScalableTestSuite_noopt_ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2.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/ScalableTestSuite 2.2.0-master/package.mo", uses=false) Using package ScalableTestSuite with version 2.2.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ScalableTestSuite 2.2.0-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: translateModel(ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2,tolerance=3e-08,outputFormat="mat",numberOfIntervals=3998,variableFilter="revolute.1..angle|revolute.1..phi|revolute.2..angle|revolute.2..phi|time|time",fileNamePrefix="ScalableTestSuite_noopt_ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2") translateModel(ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2,tolerance=3e-08,outputFormat="mat",numberOfIntervals=3998,variableFilter="revolute.1..angle|revolute.1..phi|revolute.2..angle|revolute.2..phi|time|time",fileNamePrefix="ScalableTestSuite_noopt_ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.002401/0.002401, allocations: 103.8 kB / 17.06 MB, free: 6.016 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.00274/0.00274, allocations: 195.7 kB / 18 MB, free: 5.094 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 2.515/2.515, allocations: 222.9 MB / 241.7 MB, free: 15.18 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ScalableTestSuite 2.2.0-master/package.mo): time 1.816/1.816, allocations: 119.3 MB / 411.2 MB, free: 9.508 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001986/0.001987, allocations: 69.06 kB / 0.571 GB, free: 39.94 MB / 462.3 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.291/0.293, allocations: 80.69 MB / 0.6498 GB, free: 13.13 MB / 0.4983 GB Notification: Performance of NFInst.instantiate(ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2): time 0.02066/0.3137, allocations: 12.34 MB / 0.6618 GB, free: 0.7344 MB / 0.4983 GB Notification: Performance of NFInst.instExpressions: time 0.01543/0.3293, allocations: 4.431 MB / 0.6662 GB, free: 12.29 MB / 0.5139 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.004648/0.334, allocations: 83.75 kB / 0.6663 GB, free: 12.21 MB / 0.5139 GB Notification: Performance of NFTyping.typeComponents: time 0.009035/0.3431, allocations: 3.095 MB / 0.6693 GB, free: 9.102 MB / 0.5139 GB Notification: Performance of NFTyping.typeBindings: time 0.01017/0.3535, allocations: 2.136 MB / 0.6714 GB, free: 6.961 MB / 0.5139 GB Notification: Performance of NFTyping.typeClassSections: time 0.003848/0.3574, allocations: 0.9866 MB / 0.6723 GB, free: 5.973 MB / 0.5139 GB Notification: Performance of NFFlatten.flatten: time 0.0157/0.3731, allocations: 7.068 MB / 0.6792 GB, free: 14.89 MB / 0.5295 GB Notification: Performance of NFFlatten.resolveConnections: time 0.009471/0.3827, allocations: 4.895 MB / 0.684 GB, free: 9.918 MB / 0.5295 GB Notification: Performance of NFEvalConstants.evaluate: time 0.006731/0.3895, allocations: 2.111 MB / 0.6861 GB, free: 7.801 MB / 0.5295 GB Notification: Performance of NFSimplifyModel.simplify: time 0.007236/0.3968, allocations: 2.804 MB / 0.6888 GB, free: 4.988 MB / 0.5295 GB Notification: Performance of NFPackage.collectConstants: time 0.002744/0.3996, allocations: 428 kB / 0.6892 GB, free: 4.57 MB / 0.5295 GB Notification: Performance of NFFlatten.collectFunctions: time 0.005663/0.4053, allocations: 1.315 MB / 0.6905 GB, free: 3.254 MB / 0.5295 GB Notification: Performance of NFScalarize.scalarize: time 0.006335/0.4117, allocations: 2.541 MB / 0.693 GB, free: 0.707 MB / 0.5295 GB Notification: Performance of NFVerifyModel.verify: time 0.007812/0.4196, allocations: 2.762 MB / 0.6957 GB, free: 13.93 MB / 0.5452 GB Notification: Performance of NFConvertDAE.convert: time 0.01824/0.4379, allocations: 8.921 MB / 0.7044 GB, free: 4.98 MB / 0.5452 GB Notification: Performance of FrontEnd - DAE generated: time 1.595e-05/0.438, allocations: 3.984 kB / 0.7044 GB, free: 4.977 MB / 0.5452 GB Notification: Performance of FrontEnd: time 3.687e-06/0.438, allocations: 0 / 0.7044 GB, free: 4.977 MB / 0.5452 GB Notification: Performance of Transformations before backend: time 0.0003859/0.4384, allocations: 0 / 0.7044 GB, free: 4.977 MB / 0.5452 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 1588 * Number of variables: 1588 Notification: Performance of Generate backend data structure: time 0.02783/0.4663, allocations: 6.427 MB / 0.7107 GB, free: 14.47 MB / 0.5608 GB Notification: Performance of prepare preOptimizeDAE: time 7.114e-05/0.4664, allocations: 15.89 kB / 0.7107 GB, free: 14.45 MB / 0.5608 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.05267/0.519, allocations: 5.279 MB / 0.7158 GB, free: 9.16 MB / 0.5608 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.02145/0.5406, allocations: 5.102 MB / 0.7208 GB, free: 3.977 MB / 0.5608 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.000574/0.5412, allocations: 259.2 kB / 0.7211 GB, free: 3.723 MB / 0.5608 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.003037/0.5443, allocations: 379.7 kB / 0.7214 GB, free: 3.352 MB / 0.5608 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.04074/0.5851, allocations: 11.7 MB / 0.7329 GB, free: 6.934 MB / 0.5764 GB Notification: Performance of preOpt findStateOrder (simulation): time 0.0005011/0.5857, allocations: 55.48 kB / 0.7329 GB, free: 6.879 MB / 0.5764 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.002478/0.5882, allocations: 167.9 kB / 0.7331 GB, free: 6.715 MB / 0.5764 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.006695/0.5949, allocations: 2.084 MB / 0.7351 GB, free: 4.629 MB / 0.5764 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.03245/0.6274, allocations: 10.44 MB / 0.7453 GB, free: 10.17 MB / 0.592 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 1.365/1.993, allocations: 43.2 MB / 0.7875 GB, free: 80.32 MB / 0.6079 GB Notification: Performance of preOpt comSubExp (simulation): time 0.02006/2.013, allocations: 4.75 MB / 0.7921 GB, free: 79.35 MB / 0.6079 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.006982/2.02, allocations: 2.906 MB / 0.795 GB, free: 78.3 MB / 0.6079 GB Notification: Performance of preOpt evalFunc (simulation): time 0.02764/2.048, allocations: 10.28 MB / 0.805 GB, free: 74.3 MB / 0.6079 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 6.485e-05/2.048, allocations: 58.28 kB / 0.8051 GB, free: 74.25 MB / 0.6079 GB Notification: Performance of pre-optimization done (n=186): time 8.266e-06/2.048, allocations: 0 / 0.8051 GB, free: 74.25 MB / 0.6079 GB Notification: Performance of matching and sorting (n=218): time 0.102/2.15, allocations: 28.22 MB / 0.8326 GB, free: 55.44 MB / 0.6079 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001574/2.15, allocations: 304 kB / 0.8329 GB, free: 55.07 MB / 0.6079 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.01044/2.161, allocations: 4.843 MB / 0.8376 GB, free: 50.21 MB / 0.6079 GB Notification: Performance of collectPreVariables (initialization): time 0.0008991/2.162, allocations: 57.7 kB / 0.8377 GB, free: 50.15 MB / 0.6079 GB Notification: Performance of collectInitialEqns (initialization): time 0.003036/2.165, allocations: 3.325 MB / 0.8409 GB, free: 46.82 MB / 0.6079 GB Notification: Performance of collectInitialBindings (initialization): time 0.001804/2.166, allocations: 0.8305 MB / 0.8417 GB, free: 46 MB / 0.6079 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.003522/2.17, allocations: 1.332 MB / 0.8431 GB, free: 44.66 MB / 0.6079 GB Notification: Performance of setup shared object (initialization): time 8.528e-05/2.17, allocations: 305.1 kB / 0.8433 GB, free: 44.36 MB / 0.6079 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.005894/2.176, allocations: 3.001 MB / 0.8463 GB, free: 41.35 MB / 0.6079 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.008619/2.185, allocations: 6.539 MB / 0.8527 GB, free: 33.15 MB / 0.6079 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.01562/2.2, allocations: 10.09 MB / 0.8625 GB, free: 21.4 MB / 0.6079 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 0.0001821/2.201, allocations: 32 kB / 0.8625 GB, free: 21.37 MB / 0.6079 GB Notification: Performance of matching and sorting (n=828) (initialization): time 0.03339/2.234, allocations: 11.78 MB / 0.874 GB, free: 9.566 MB / 0.6079 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001295/2.234, allocations: 56 kB / 0.8741 GB, free: 9.512 MB / 0.6079 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0002104/2.235, allocations: 127.9 kB / 0.8742 GB, free: 9.387 MB / 0.6079 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.008668/2.243, allocations: 2.658 MB / 0.8768 GB, free: 6.723 MB / 0.6079 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.007716/2.251, allocations: 1.542 MB / 0.8783 GB, free: 5.18 MB / 0.6079 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.02807/2.279, allocations: 14.13 MB / 0.8921 GB, free: 6.914 MB / 0.6235 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.01075/2.29, allocations: 479.2 kB / 0.8926 GB, free: 6.445 MB / 0.6235 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.002516/2.293, allocations: 371.4 kB / 0.8929 GB, free: 6.086 MB / 0.6235 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 553 * Number of states: 0 () * Number of discrete variables: 41 (force.arrow.arrowLine.twoHeadedArrow,force.arrow.headAtOrigin,force.color[3],force.color[2],force.color[1],bodybox[1].color[3],bodybox[1].color[2],bodybox[1].color[1],bodybox[1].body.sphereColor[3],bodybox[1].body.sphereColor[2],bodybox[1].body.sphereColor[1],bodyboxN.color[3],bodyboxN.color[2],bodyboxN.color[1],bodyboxN.body.sphereColor[3],bodyboxN.body.sphereColor[2],bodyboxN.body.sphereColor[1],bodybox1.color[3],bodybox1.color[2],bodybox1.color[1],bodybox1.body.sphereColor[3],bodybox1.body.sphereColor[2],bodybox1.body.sphereColor[1],revolute[2].cylinderColor[3],revolute[2].cylinderColor[2],revolute[2].cylinderColor[1],revolute[1].cylinderColor[3],revolute[1].cylinderColor[2],revolute[1].cylinderColor[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],world.gravityArrowColor[3],world.gravityArrowColor[2],world.gravityArrowColor[1]) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (762): * Single equations (assignments): 758 * Array equations: 3 * 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): 1 system {(4,39,87.5%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.01033/2.303, allocations: 2.609 MB / 0.8955 GB, free: 3.469 MB / 0.6235 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.00228/2.305, allocations: 410.8 kB / 0.8959 GB, free: 3.062 MB / 0.6235 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.02291/2.328, allocations: 6.631 MB / 0.9023 GB, free: 12.41 MB / 0.6392 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 0.0001025/2.328, allocations: 27.94 kB / 0.9024 GB, free: 12.39 MB / 0.6392 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.916e-05/2.328, allocations: 8 kB / 0.9024 GB, free: 12.38 MB / 0.6392 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.603e-05/2.329, allocations: 7.969 kB / 0.9024 GB, free: 12.37 MB / 0.6392 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.04887/2.377, allocations: 13.2 MB / 0.9153 GB, free: 15.09 MB / 0.6548 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.582e-05/2.378, allocations: 3.938 kB / 0.9153 GB, free: 15.09 MB / 0.6548 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.002833/2.38, allocations: 403.6 kB / 0.9157 GB, free: 14.69 MB / 0.6548 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.009685/2.39, allocations: 2.455 MB / 0.9181 GB, free: 12.23 MB / 0.6548 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0007534/2.391, allocations: 43.98 kB / 0.9181 GB, free: 12.19 MB / 0.6548 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.03047/2.421, allocations: 13.64 MB / 0.9314 GB, free: 14.41 MB / 0.6704 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.121e-05/2.422, allocations: 11.84 kB / 0.9314 GB, free: 14.4 MB / 0.6704 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.02916/2.451, allocations: 10.22 MB / 0.9414 GB, free: 4.113 MB / 0.6704 GB Notification: Performance of postOpt removeConstants (simulation): time 0.002885/2.454, allocations: 487.7 kB / 0.9419 GB, free: 3.609 MB / 0.6704 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.002635/2.456, allocations: 36 kB / 0.9419 GB, free: 3.574 MB / 0.6704 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.005317/2.462, allocations: 263.2 kB / 0.9422 GB, free: 3.324 MB / 0.6704 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.001702/2.463, allocations: 137 kB / 0.9423 GB, free: 3.188 MB / 0.6704 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0008005/2.464, allocations: 60 kB / 0.9424 GB, free: 3.129 MB / 0.6704 GB Notification: Performance of sorting global known variables: time 0.01189/2.476, allocations: 3.102 MB / 0.9454 GB, free: 28 kB / 0.6704 GB Notification: Performance of sort global known variables: time 8.32e-07/2.476, allocations: 0 / 0.9454 GB, free: 28 kB / 0.6704 GB Notification: Performance of remove unused functions: time 0.01249/2.489, allocations: 1.307 MB / 0.9467 GB, free: 14.72 MB / 0.686 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 13 * Number of states: 4 (revolute[1].phi,revolute[1].w,revolute[2].phi,revolute[2].w) * 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 (159): * Single equations (assignments): 155 * Array equations: 3 * 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): 1 system {(3,37,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.001404/2.49, allocations: 186.7 kB / 0.9468 GB, free: 14.54 MB / 0.686 GB Notification: Performance of simCode: created initialization part: time 0.02051/2.511, allocations: 7.13 MB / 0.9538 GB, free: 7.43 MB / 0.686 GB Notification: Performance of simCode: created event and clocks part: time 1.608e-05/2.511, allocations: 4 kB / 0.9538 GB, free: 7.426 MB / 0.686 GB Notification: Performance of simCode: created simulation system equations: time 0.007718/2.519, allocations: 2.66 MB / 0.9564 GB, free: 4.75 MB / 0.686 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.009779/2.528, allocations: 0.6428 MB / 0.957 GB, free: 4.121 MB / 0.686 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.04773/2.576, allocations: 12.34 MB / 0.9691 GB, free: 7.73 MB / 0.7017 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.01516/2.592, allocations: 3.941 MB / 0.9729 GB, free: 3.758 MB / 0.7017 GB Notification: Performance of simCode: alias equations: time 0.01127/2.603, allocations: 2.195 MB / 0.9751 GB, free: 1.555 MB / 0.7017 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.002278/2.605, allocations: 279.3 kB / 0.9753 GB, free: 1.281 MB / 0.7017 GB Notification: Performance of SimCode: time 2.815e-06/2.605, allocations: 0 / 0.9753 GB, free: 1.281 MB / 0.7017 GB Notification: Performance of Templates: time 0.1774/2.783, allocations: 55.07 MB / 1.029 GB, free: 10.55 MB / 0.7642 GB make -j1 -f ScalableTestSuite_noopt_ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2.makefile (rm -f ScalableTestSuite_noopt_ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2.pipe ; mkfifo ScalableTestSuite_noopt_ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2.pipe ; head -c 1048576 < ScalableTestSuite_noopt_ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2.pipe >> ../files/ScalableTestSuite_noopt_ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2.sim & ./ScalableTestSuite_noopt_ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2 -abortSlowSimulation -alarm=300 -emit_protected -lv LOG_STATS > ScalableTestSuite_noopt_ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2.pipe 2>&1) diffSimulationResults("ScalableTestSuite_noopt_ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2_res.mat","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/ReferenceFiles/ScalableTestSuite/ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2_res.mat","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/ScalableTestSuite_noopt_ScalableTestSuite.Mechanical.FlexibleBeam.ScaledExperiments.FlexibleBeamModelica_N_2.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches