Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques3.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica trunk/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest trunk/package.mo", uses=false) Using package ModelicaTest with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest trunk/package.mo) Using package Modelica with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica trunk/package.mo) Using package Complex with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo) Using package ModelicaServices with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo) Running command: "" <> buildModelFMU(ModelicaTest.MultiBody.Forces.FrameForcesAndTorques3,fileNamePrefix="ModelicaTest_trunk_ModelicaTest_MultiBody_Forces_FrameForcesAndTorques3",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(ModelicaTest.MultiBody.Forces.FrameForcesAndTorques3,fileNamePrefix="ModelicaTest_trunk_ModelicaTest_MultiBody_Forces_FrameForcesAndTorques3",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo): time 0.001278/0.001278, allocations: 103.9 kB / 17.63 MB, free: 5.523 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo): time 0.001294/0.001294, allocations: 206.4 kB / 18.58 MB, free: 4.582 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica trunk/package.mo): time 1.479/1.479, allocations: 227.4 MB / 246.8 MB, free: 10.61 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest trunk/package.mo): time 0.2393/0.2393, allocations: 46.1 MB / 344.1 MB, free: 11.59 MB / 286.1 MB Notification: Performance of FrontEnd - loaded program: time 0.002006/0.002006, allocations: 77.16 kB / 417.7 MB, free: 19.62 MB / 302.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1334/0.1355, allocations: 62.44 MB / 480.1 MB, free: 5.172 MB / 350.1 MB Notification: Performance of NFInst.instantiate(ModelicaTest.MultiBody.Forces.FrameForcesAndTorques3): time 0.01608/0.1516, allocations: 13.65 MB / 493.8 MB, free: 7.457 MB / 366.1 MB Notification: Performance of NFInst.instExpressions: time 0.01082/0.1624, allocations: 4.723 MB / 498.5 MB, free: 2.719 MB / 366.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.00265/0.1651, allocations: 91.69 kB / 498.6 MB, free: 2.629 MB / 366.1 MB Notification: Performance of NFTyping.typeComponents: time 0.008826/0.1741, allocations: 4.466 MB / 0.4913 GB, free: 14.15 MB / 382.1 MB Notification: Performance of NFTyping.typeBindings: time 0.00711/0.1812, allocations: 2.194 MB / 0.4934 GB, free: 11.95 MB / 382.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.003517/0.1848, allocations: 1.146 MB / 0.4945 GB, free: 10.8 MB / 382.1 MB Notification: Performance of NFFlatten.flatten: time 0.01007/0.1949, allocations: 6.343 MB / 0.5007 GB, free: 4.441 MB / 382.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.2853/0.4802, allocations: 5.55 MB / 0.5061 GB, free: 14.93 MB / 382.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.006922/0.4872, allocations: 2.225 MB / 0.5083 GB, free: 14.84 MB / 382.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.007586/0.4948, allocations: 2.93 MB / 0.5112 GB, free: 14.54 MB / 382.1 MB Notification: Performance of NFPackage.collectConstants: time 0.002671/0.4975, allocations: 499.8 kB / 0.5117 GB, free: 14.54 MB / 382.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.005719/0.5033, allocations: 1.499 MB / 0.5131 GB, free: 14.53 MB / 382.1 MB Notification: Performance of NFScalarize.scalarize: time 0.006038/0.5093, allocations: 2.679 MB / 0.5157 GB, free: 14.27 MB / 382.1 MB Notification: Performance of NFVerifyModel.verify: time 0.009797/0.5192, allocations: 3.128 MB / 0.5188 GB, free: 13.21 MB / 382.1 MB Notification: Performance of NFConvertDAE.convert: time 0.01779/0.537, allocations: 9.553 MB / 0.5281 GB, free: 9.961 MB / 382.1 MB Notification: Performance of FrontEnd - DAE generated: time 1.06e-05/0.5371, allocations: 4 kB / 0.5281 GB, free: 9.957 MB / 382.1 MB Notification: Performance of FrontEnd: time 2.004e-06/0.5371, allocations: 0 / 0.5281 GB, free: 9.957 MB / 382.1 MB Notification: Performance of Transformations before backend: time 0.0004184/0.5375, allocations: 0.75 kB / 0.5281 GB, free: 9.957 MB / 382.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 1985 * Number of variables: 1985 Notification: Performance of Generate backend data structure: time 0.02868/0.5662, allocations: 6.86 MB / 0.5348 GB, free: 5.434 MB / 382.1 MB Notification: Performance of prepare preOptimizeDAE: time 6.588e-05/0.5663, allocations: 10.44 kB / 0.5348 GB, free: 5.434 MB / 382.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.003958/0.5703, allocations: 0.9511 MB / 0.5358 GB, free: 4.816 MB / 382.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.04938/0.6197, allocations: 6.057 MB / 0.5417 GB, free: 1.848 MB / 382.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.01211/0.6318, allocations: 4.21 MB / 0.5458 GB, free: 15.5 MB / 398.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0003291/0.6322, allocations: 335 kB / 0.5461 GB, free: 15.39 MB / 398.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.002368/0.6346, allocations: 449.7 kB / 0.5465 GB, free: 15.27 MB / 398.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.03198/0.6666, allocations: 13.86 MB / 0.5601 GB, free: 0.9258 MB / 398.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 0.0003673/0.667, allocations: 57.66 kB / 0.5601 GB, free: 0.8906 MB / 398.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.002116/0.6692, allocations: 212.5 kB / 0.5603 GB, free: 0.7266 MB / 398.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.005163/0.6743, allocations: 2.539 MB / 0.5628 GB, free: 14.22 MB / 414.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.02936/0.7037, allocations: 11.87 MB / 0.5744 GB, free: 2.562 MB / 414.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.08267/0.7864, allocations: 51.55 MB / 0.6248 GB, free: 14.42 MB / 478.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.01666/0.8032, allocations: 6.106 MB / 0.6307 GB, free: 8.18 MB / 478.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.004991/0.8082, allocations: 3.732 MB / 0.6344 GB, free: 4.438 MB / 478.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.02217/0.8304, allocations: 12.81 MB / 0.6469 GB, free: 7.555 MB / 494.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 6.164e-05/0.8305, allocations: 52.56 kB / 0.6469 GB, free: 7.496 MB / 494.1 MB Notification: Performance of pre-optimization done (n=228): time 6.222e-06/0.8305, allocations: 4 kB / 0.6469 GB, free: 7.492 MB / 494.1 MB Notification: Performance of matching and sorting (n=270): time 0.08369/0.9142, allocations: 27.67 MB / 0.674 GB, free: 11.7 MB / 0.5137 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001472/0.9144, allocations: 208.5 kB / 0.6741 GB, free: 11.45 MB / 0.5137 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.01074/0.9251, allocations: 4.958 MB / 0.679 GB, free: 6.488 MB / 0.5137 GB Notification: Performance of collectPreVariables (initialization): time 0.0008231/0.926, allocations: 65.7 kB / 0.6791 GB, free: 6.418 MB / 0.5137 GB Notification: Performance of collectInitialEqns (initialization): time 0.003402/0.9294, allocations: 3.847 MB / 0.6828 GB, free: 2.57 MB / 0.5137 GB Notification: Performance of collectInitialBindings (initialization): time 0.001567/0.931, allocations: 1.005 MB / 0.6838 GB, free: 1.57 MB / 0.5137 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.003761/0.9348, allocations: 1.451 MB / 0.6852 GB, free: 116 kB / 0.5137 GB Notification: Performance of setup shared object (initialization): time 0.0001132/0.9349, allocations: 301.1 kB / 0.6855 GB, free: 15.82 MB / 0.5294 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.005288/0.9402, allocations: 3.063 MB / 0.6885 GB, free: 12.75 MB / 0.5294 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.008448/0.9487, allocations: 7.109 MB / 0.6954 GB, free: 3.73 MB / 0.5294 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.01473/0.9634, allocations: 11.02 MB / 0.7062 GB, free: 7.32 MB / 0.545 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 0.0001683/0.9636, allocations: 40 kB / 0.7062 GB, free: 7.281 MB / 0.545 GB Notification: Performance of matching and sorting (n=922) (initialization): time 0.3725/1.336, allocations: 11.51 MB / 0.7175 GB, free: 185.4 MB / 0.545 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001151/1.336, allocations: 64.34 kB / 0.7175 GB, free: 185.4 MB / 0.545 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0002406/1.337, allocations: 145.6 kB / 0.7177 GB, free: 185.4 MB / 0.545 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.00463/1.341, allocations: 1.749 MB / 0.7194 GB, free: 185.4 MB / 0.545 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.006791/1.348, allocations: 1.636 MB / 0.721 GB, free: 185.4 MB / 0.545 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01657/1.365, allocations: 12.86 MB / 0.7335 GB, free: 179.5 MB / 0.545 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.006049/1.371, allocations: 419.9 kB / 0.7339 GB, free: 179.4 MB / 0.545 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0009402/1.372, allocations: 424.3 kB / 0.7343 GB, free: 179.3 MB / 0.545 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 642 * Number of states: 0 () * Number of discrete variables: 59 (frameTorque2.torqueArrow.twoHeadedArrow,frameTorque2.torqueArrow.headAtOrigin,frameTorque2.forceArrow.twoHeadedArrow,frameTorque2.forceArrow.headAtOrigin,frameTorque1.torqueArrow.twoHeadedArrow,frameTorque1.torqueArrow.headAtOrigin,frameTorque1.forceArrow.twoHeadedArrow,frameTorque1.forceArrow.headAtOrigin,fixedTranslation.color[3],fixedTranslation.color[2],fixedTranslation.color[1],Revolute4.cylinderColor[3],Revolute4.cylinderColor[2],Revolute4.cylinderColor[1],Revolute3.cylinderColor[3],Revolute3.cylinderColor[2],Revolute3.cylinderColor[1],Revolute2.cylinderColor[3],Revolute2.cylinderColor[2],Revolute2.cylinderColor[1],frameTorque2.torqueColor[3],frameTorque2.torqueColor[2],frameTorque2.torqueColor[1],frameTorque2.forceColor[3],frameTorque2.forceColor[2],frameTorque2.forceColor[1],frameTorque1.torqueColor[3],frameTorque1.torqueColor[2],frameTorque1.torqueColor[1],frameTorque1.forceColor[3],frameTorque1.forceColor[2],frameTorque1.forceColor[1],body2.color[3],body2.color[2],body2.color[1],body2.body.sphereColor[3],body2.body.sphereColor[2],body2.body.sphereColor[1],body1.color[3],body1.color[2],body1.color[1],body1.body.sphereColor[3],body1.body.sphereColor[2],body1.body.sphereColor[1],Revolute1.cylinderColor[3],Revolute1.cylinderColor[2],Revolute1.cylinderColor[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 (850): * Single equations (assignments): 845 * Array equations: 3 * 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 {(2,23,100.0%), (2,23,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.004341/1.376, allocations: 2.686 MB / 0.737 GB, free: 178.3 MB / 0.545 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0007784/1.377, allocations: 457.9 kB / 0.7374 GB, free: 178.3 MB / 0.545 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.009722/1.386, allocations: 6.25 MB / 0.7435 GB, free: 176 MB / 0.545 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.92e-05/1.387, allocations: 35.22 kB / 0.7435 GB, free: 176 MB / 0.545 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.508e-05/1.387, allocations: 10.69 kB / 0.7435 GB, free: 176 MB / 0.545 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 2.073e-05/1.387, allocations: 13.08 kB / 0.7436 GB, free: 176 MB / 0.545 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.02115/1.408, allocations: 13.62 MB / 0.7569 GB, free: 170.1 MB / 0.545 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.664e-05/1.408, allocations: 0 / 0.7569 GB, free: 170.1 MB / 0.545 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.00218/1.41, allocations: 452.9 kB / 0.7573 GB, free: 169.8 MB / 0.545 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.003619/1.414, allocations: 1.527 MB / 0.7588 GB, free: 168.7 MB / 0.545 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0002816/1.414, allocations: 53.27 kB / 0.7588 GB, free: 168.6 MB / 0.545 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.01278/1.427, allocations: 12.13 MB / 0.7707 GB, free: 156.7 MB / 0.545 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.425e-06/1.427, allocations: 0 / 0.7707 GB, free: 156.7 MB / 0.545 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01345/1.44, allocations: 10.06 MB / 0.7805 GB, free: 146.8 MB / 0.545 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001337/1.442, allocations: 0.4902 MB / 0.781 GB, free: 146.4 MB / 0.545 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0007616/1.442, allocations: 40 kB / 0.781 GB, free: 146.4 MB / 0.545 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002091/1.444, allocations: 193.8 kB / 0.7812 GB, free: 146.2 MB / 0.545 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0004861/1.445, allocations: 149.7 kB / 0.7813 GB, free: 146.1 MB / 0.545 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001949/1.445, allocations: 79.98 kB / 0.7814 GB, free: 146 MB / 0.545 GB Notification: Performance of sorting global known variables: time 0.004731/1.45, allocations: 3.124 MB / 0.7845 GB, free: 142.9 MB / 0.545 GB Notification: Performance of sort global known variables: time 3.8e-07/1.45, allocations: 3.938 kB / 0.7845 GB, free: 142.9 MB / 0.545 GB Notification: Performance of remove unused functions: time 0.007406/1.457, allocations: 1.376 MB / 0.7858 GB, free: 141.5 MB / 0.545 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 4 * Number of states: 8 (Revolute1.phi,Revolute1.w,Revolute2.phi,Revolute2.w,Revolute3.phi,Revolute3.w,Revolute4.phi,Revolute4.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 (212): * Single equations (assignments): 207 * Array equations: 3 * 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 {(4,18,75.0%), (4,18,75.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.01306/1.47, allocations: 10.74 MB / 0.7963 GB, free: 130.7 MB / 0.545 GB Notification: Performance of simCode: created initialization part: time 0.01559/1.486, allocations: 10.83 MB / 0.8069 GB, free: 119.9 MB / 0.545 GB Notification: Performance of simCode: created event and clocks part: time 8.075e-06/1.486, allocations: 4 kB / 0.8069 GB, free: 119.9 MB / 0.545 GB Notification: Performance of simCode: created simulation system equations: time 0.004794/1.491, allocations: 3.247 MB / 0.8101 GB, free: 116.6 MB / 0.545 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.004103/1.495, allocations: 0.6506 MB / 0.8107 GB, free: 116 MB / 0.545 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.09619/1.591, allocations: 72.99 MB / 0.882 GB, free: 33.97 MB / 0.545 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.006365/1.598, allocations: 4.19 MB / 0.8861 GB, free: 29.75 MB / 0.545 GB Notification: Performance of simCode: alias equations: time 0.006415/1.604, allocations: 2.301 MB / 0.8883 GB, free: 27.44 MB / 0.545 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.004928/1.609, allocations: 2.604 MB / 0.8909 GB, free: 24.84 MB / 0.545 GB Notification: Performance of SimCode: time 8.42e-07/1.609, allocations: 0 / 0.8909 GB, free: 24.84 MB / 0.545 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.4301/2.039, allocations: 105.4 MB / 0.9938 GB, free: 130.7 MB / 0.545 GB Notification: Performance of buildModelFMU: Generate platform static: time 12.39/14.43, allocations: 7.438 kB / 0.9938 GB, free: 130.7 MB / 0.545 GB (rm -f ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques3.pipe ; mkfifo ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques3.pipe ; head -c 1048576 < ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques3.pipe >> ../files/ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques3.sim & python3 -m fmpy simulate --output-file ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques3_res.csv --start-time 0 --stop-time 2 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.0008 ModelicaTest_trunk_ModelicaTest_MultiBody_Forces_FrameForcesAndTorques3.fmu > ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques3.pipe 2>&1) diffSimulationResults("ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques3_res.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/Reference-modelica.org/ReferenceResults/MAP-LIB_ReferenceResults/v4.0.0/ModelicaTest/MultiBody/Forces/FrameForcesAndTorques3/FrameForcesAndTorques3.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/ModelicaTest_trunk_ModelicaTest.MultiBody.Forces.FrameForcesAndTorques3.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches