./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2409cd2f018515417b0b6bf5d396e4bc80c02540769112137ebf388167bdf776 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-25 00:09:18,835 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 00:09:18,914 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 00:09:18,919 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 00:09:18,920 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 00:09:18,953 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 00:09:18,955 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 00:09:18,956 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 00:09:18,956 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 00:09:18,957 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 00:09:18,957 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 00:09:18,957 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 00:09:18,958 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 00:09:18,962 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 00:09:18,963 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 00:09:18,963 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 00:09:18,963 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 00:09:18,964 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 00:09:18,964 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 00:09:18,964 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 00:09:18,964 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 00:09:18,968 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 00:09:18,969 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 00:09:18,969 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 00:09:18,969 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 00:09:18,969 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 00:09:18,970 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 00:09:18,970 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 00:09:18,970 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 00:09:18,970 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 00:09:18,971 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 00:09:18,971 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 00:09:18,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:09:18,971 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 00:09:18,971 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 00:09:18,972 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 00:09:18,972 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 00:09:18,972 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 00:09:18,973 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 00:09:18,973 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 00:09:18,974 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 00:09:18,975 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 00:09:18,975 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2409cd2f018515417b0b6bf5d396e4bc80c02540769112137ebf388167bdf776 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 00:09:19,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 00:09:19,278 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 00:09:19,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 00:09:19,282 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 00:09:19,282 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 00:09:19,284 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2024-09-25 00:09:21,054 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 00:09:21,265 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 00:09:21,266 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2024-09-25 00:09:21,273 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/fb0c87f3f/2b8d092821d447f7be36e92f27135f22/FLAG1c24b059c [2024-09-25 00:09:21,288 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/fb0c87f3f/2b8d092821d447f7be36e92f27135f22 [2024-09-25 00:09:21,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 00:09:21,293 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 00:09:21,294 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 00:09:21,294 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 00:09:21,299 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 00:09:21,300 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:09:21" (1/1) ... [2024-09-25 00:09:21,301 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68fc17c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21, skipping insertion in model container [2024-09-25 00:09:21,301 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:09:21" (1/1) ... [2024-09-25 00:09:21,317 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 00:09:21,458 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2024-09-25 00:09:21,462 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:09:21,473 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 00:09:21,510 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2024-09-25 00:09:21,510 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 00:09:21,555 INFO L204 MainTranslator]: Completed translation [2024-09-25 00:09:21,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21 WrapperNode [2024-09-25 00:09:21,559 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 00:09:21,561 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 00:09:21,562 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 00:09:21,562 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 00:09:21,599 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21" (1/1) ... [2024-09-25 00:09:21,606 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21" (1/1) ... [2024-09-25 00:09:21,614 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 00:09:21,614 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 00:09:21,615 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 00:09:21,615 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 00:09:21,615 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 00:09:21,627 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21" (1/1) ... [2024-09-25 00:09:21,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21" (1/1) ... [2024-09-25 00:09:21,628 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21" (1/1) ... [2024-09-25 00:09:21,640 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-25 00:09:21,640 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21" (1/1) ... [2024-09-25 00:09:21,641 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21" (1/1) ... [2024-09-25 00:09:21,643 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21" (1/1) ... [2024-09-25 00:09:21,645 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21" (1/1) ... [2024-09-25 00:09:21,646 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21" (1/1) ... [2024-09-25 00:09:21,647 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21" (1/1) ... [2024-09-25 00:09:21,648 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 00:09:21,649 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 00:09:21,649 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 00:09:21,649 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 00:09:21,650 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21" (1/1) ... [2024-09-25 00:09:21,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 00:09:21,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:21,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 00:09:21,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 00:09:21,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 00:09:21,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 00:09:21,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 00:09:21,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 00:09:21,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 00:09:21,740 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 00:09:21,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 00:09:21,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 00:09:21,742 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-25 00:09:21,742 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-25 00:09:21,806 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 00:09:21,808 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 00:09:21,939 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-25 00:09:21,940 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 00:09:21,959 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 00:09:21,960 INFO L317 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-25 00:09:21,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:09:21 BoogieIcfgContainer [2024-09-25 00:09:21,960 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 00:09:21,963 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 00:09:21,963 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 00:09:21,966 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 00:09:21,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:09:21" (1/3) ... [2024-09-25 00:09:21,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b40173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:09:21, skipping insertion in model container [2024-09-25 00:09:21,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:09:21" (2/3) ... [2024-09-25 00:09:21,968 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b40173 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:09:21, skipping insertion in model container [2024-09-25 00:09:21,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:09:21" (3/3) ... [2024-09-25 00:09:21,969 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2024-09-25 00:09:21,986 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 00:09:21,986 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 00:09:22,037 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 00:09:22,047 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@33502a3b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 00:09:22,048 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 00:09:22,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 00:09:22,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-25 00:09:22,060 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:22,061 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:22,062 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:22,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:22,071 INFO L85 PathProgramCache]: Analyzing trace with hash 2082045565, now seen corresponding path program 1 times [2024-09-25 00:09:22,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:22,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936527756] [2024-09-25 00:09:22,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:22,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:22,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:22,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 00:09:22,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:22,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936527756] [2024-09-25 00:09:22,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936527756] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 00:09:22,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 00:09:22,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 00:09:22,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977967949] [2024-09-25 00:09:22,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 00:09:22,463 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 00:09:22,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:22,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 00:09:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 00:09:22,501 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 00:09:22,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:22,581 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-25 00:09:22,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 00:09:22,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2024-09-25 00:09:22,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:22,596 INFO L225 Difference]: With dead ends: 30 [2024-09-25 00:09:22,596 INFO L226 Difference]: Without dead ends: 18 [2024-09-25 00:09:22,599 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 00:09:22,605 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:22,606 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:09:22,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-25 00:09:22,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-25 00:09:22,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-25 00:09:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-25 00:09:22,643 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-25 00:09:22,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:22,643 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-25 00:09:22,643 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 00:09:22,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:22,644 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-25 00:09:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-25 00:09:22,645 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:22,646 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:22,646 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 00:09:22,646 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:22,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:22,646 INFO L85 PathProgramCache]: Analyzing trace with hash -799337521, now seen corresponding path program 1 times [2024-09-25 00:09:22,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:22,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076988625] [2024-09-25 00:09:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:22,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:22,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:22,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:22,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:22,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 00:09:22,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:22,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076988625] [2024-09-25 00:09:22,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076988625] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:22,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310152342] [2024-09-25 00:09:22,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:22,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:22,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:22,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:09:22,849 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 00:09:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:22,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-25 00:09:22,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 00:09:22,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 00:09:23,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310152342] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:23,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:23,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-09-25 00:09:23,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033056285] [2024-09-25 00:09:23,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:23,203 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-25 00:09:23,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:23,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-25 00:09:23,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-25 00:09:23,208 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 00:09:23,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:23,285 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-09-25 00:09:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 00:09:23,287 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) Word has length 19 [2024-09-25 00:09:23,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:23,288 INFO L225 Difference]: With dead ends: 25 [2024-09-25 00:09:23,288 INFO L226 Difference]: Without dead ends: 21 [2024-09-25 00:09:23,289 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-09-25 00:09:23,290 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:23,292 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 50 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 00:09:23,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-25 00:09:23,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-25 00:09:23,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-25 00:09:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-25 00:09:23,303 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2024-09-25 00:09:23,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:23,304 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-25 00:09:23,304 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 00:09:23,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:23,305 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-25 00:09:23,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-25 00:09:23,306 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:23,306 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:23,328 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 00:09:23,511 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:23,512 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:23,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:23,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1955994435, now seen corresponding path program 2 times [2024-09-25 00:09:23,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:23,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629590139] [2024-09-25 00:09:23,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:23,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:23,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:23,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:23,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:23,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-25 00:09:23,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:23,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629590139] [2024-09-25 00:09:23,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629590139] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:23,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71487959] [2024-09-25 00:09:23,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:09:23,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:23,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:23,793 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:09:23,795 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 00:09:23,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:09:23,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:23,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-25 00:09:23,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-25 00:09:23,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-25 00:09:24,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71487959] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:24,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:24,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 14 [2024-09-25 00:09:24,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200266857] [2024-09-25 00:09:24,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:24,215 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-25 00:09:24,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:24,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-25 00:09:24,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-09-25 00:09:24,217 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-25 00:09:24,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:24,286 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-25 00:09:24,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 00:09:24,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 25 [2024-09-25 00:09:24,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:24,290 INFO L225 Difference]: With dead ends: 28 [2024-09-25 00:09:24,291 INFO L226 Difference]: Without dead ends: 24 [2024-09-25 00:09:24,291 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2024-09-25 00:09:24,292 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:24,292 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 00:09:24,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-25 00:09:24,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-25 00:09:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-25 00:09:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-25 00:09:24,298 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2024-09-25 00:09:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:24,298 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-25 00:09:24,298 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-25 00:09:24,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:24,299 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-25 00:09:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-25 00:09:24,300 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:24,300 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:24,320 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 00:09:24,503 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:24,504 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:24,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:24,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1072241521, now seen corresponding path program 3 times [2024-09-25 00:09:24,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:24,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691710427] [2024-09-25 00:09:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:24,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:24,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:24,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:24,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:24,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:24,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 00:09:24,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:24,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691710427] [2024-09-25 00:09:24,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691710427] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:24,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64949482] [2024-09-25 00:09:24,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:09:24,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:24,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:24,704 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:09:24,706 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 00:09:24,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 00:09:24,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:24,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-25 00:09:24,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 00:09:24,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:25,277 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-25 00:09:25,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64949482] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:25,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:25,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 16 [2024-09-25 00:09:25,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98951908] [2024-09-25 00:09:25,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:25,278 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 00:09:25,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:25,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 00:09:25,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-09-25 00:09:25,280 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-25 00:09:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:25,342 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-09-25 00:09:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 00:09:25,343 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) Word has length 31 [2024-09-25 00:09:25,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:25,344 INFO L225 Difference]: With dead ends: 31 [2024-09-25 00:09:25,344 INFO L226 Difference]: Without dead ends: 27 [2024-09-25 00:09:25,345 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-09-25 00:09:25,345 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:25,346 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 74 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 00:09:25,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-25 00:09:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-25 00:09:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-25 00:09:25,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-25 00:09:25,352 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2024-09-25 00:09:25,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:25,352 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-25 00:09:25,352 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-25 00:09:25,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-25 00:09:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-25 00:09:25,354 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:25,354 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:25,371 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 00:09:25,554 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:25,555 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:25,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:25,556 INFO L85 PathProgramCache]: Analyzing trace with hash -790562051, now seen corresponding path program 4 times [2024-09-25 00:09:25,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:25,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698376920] [2024-09-25 00:09:25,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:25,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:25,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:25,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:25,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:25,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:25,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:25,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-25 00:09:25,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:25,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698376920] [2024-09-25 00:09:25,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698376920] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:25,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512491834] [2024-09-25 00:09:25,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:09:25,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:25,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:25,769 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:09:25,771 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 00:09:25,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:09:25,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:25,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-25 00:09:25,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-25 00:09:25,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-25 00:09:26,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512491834] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:26,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:26,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 18 [2024-09-25 00:09:26,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33779536] [2024-09-25 00:09:26,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:26,632 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 00:09:26,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:26,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 00:09:26,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2024-09-25 00:09:26,634 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-25 00:09:26,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:26,748 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-25 00:09:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 00:09:26,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) Word has length 37 [2024-09-25 00:09:26,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:26,751 INFO L225 Difference]: With dead ends: 34 [2024-09-25 00:09:26,751 INFO L226 Difference]: Without dead ends: 30 [2024-09-25 00:09:26,752 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2024-09-25 00:09:26,753 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:26,753 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 90 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:09:26,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-25 00:09:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-25 00:09:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-25 00:09:26,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-09-25 00:09:26,764 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-09-25 00:09:26,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:26,764 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-09-25 00:09:26,764 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-25 00:09:26,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:26,765 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-09-25 00:09:26,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-25 00:09:26,766 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:26,766 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:26,785 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 00:09:26,971 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:26,972 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:26,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:26,972 INFO L85 PathProgramCache]: Analyzing trace with hash 446137679, now seen corresponding path program 5 times [2024-09-25 00:09:26,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:26,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996621211] [2024-09-25 00:09:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:26,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:27,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:27,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:27,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:27,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:27,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:27,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:27,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:27,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:27,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-25 00:09:27,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:27,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996621211] [2024-09-25 00:09:27,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996621211] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:27,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108299880] [2024-09-25 00:09:27,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 00:09:27,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:27,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:27,289 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:09:27,294 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 00:09:27,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-25 00:09:27,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:27,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-25 00:09:27,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:27,441 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 00:09:27,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-25 00:09:28,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108299880] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:28,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:28,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 20 [2024-09-25 00:09:28,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398583276] [2024-09-25 00:09:28,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:28,519 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 00:09:28,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:28,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 00:09:28,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2024-09-25 00:09:28,521 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-25 00:09:28,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:28,636 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-09-25 00:09:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 00:09:28,637 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) Word has length 43 [2024-09-25 00:09:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:28,638 INFO L225 Difference]: With dead ends: 37 [2024-09-25 00:09:28,638 INFO L226 Difference]: Without dead ends: 33 [2024-09-25 00:09:28,638 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2024-09-25 00:09:28,639 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:28,639 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 86 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:09:28,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-25 00:09:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-25 00:09:28,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-25 00:09:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-25 00:09:28,646 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2024-09-25 00:09:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:28,647 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-25 00:09:28,647 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-25 00:09:28,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-25 00:09:28,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-25 00:09:28,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:28,649 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:28,667 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 00:09:28,853 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-25 00:09:28,854 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:28,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:28,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1764409661, now seen corresponding path program 6 times [2024-09-25 00:09:28,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:28,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790213221] [2024-09-25 00:09:28,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:28,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:28,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:28,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:28,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:29,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:29,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:29,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:29,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:29,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:29,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:29,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-25 00:09:29,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:29,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790213221] [2024-09-25 00:09:29,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790213221] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:29,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220941291] [2024-09-25 00:09:29,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 00:09:29,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:29,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:29,148 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:09:29,149 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 00:09:29,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-25 00:09:29,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:29,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-25 00:09:29,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-25 00:09:29,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-25 00:09:30,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220941291] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:30,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:30,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 22 [2024-09-25 00:09:30,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270841215] [2024-09-25 00:09:30,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:30,771 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-25 00:09:30,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:30,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-25 00:09:30,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2024-09-25 00:09:30,774 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-25 00:09:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:30,871 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-25 00:09:30,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 00:09:30,872 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) Word has length 49 [2024-09-25 00:09:30,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:30,873 INFO L225 Difference]: With dead ends: 40 [2024-09-25 00:09:30,873 INFO L226 Difference]: Without dead ends: 36 [2024-09-25 00:09:30,873 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2024-09-25 00:09:30,874 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:30,874 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 00:09:30,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-25 00:09:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-25 00:09:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-25 00:09:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-09-25 00:09:30,880 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2024-09-25 00:09:30,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:30,880 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-09-25 00:09:30,881 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-25 00:09:30,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:30,881 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-09-25 00:09:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-25 00:09:30,882 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:30,882 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:30,901 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 00:09:31,086 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:31,087 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:31,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:31,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1097922063, now seen corresponding path program 7 times [2024-09-25 00:09:31,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:31,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891845962] [2024-09-25 00:09:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:31,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:31,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:31,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:31,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:31,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:31,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:31,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:31,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:31,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:31,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:31,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:31,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:31,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:31,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-25 00:09:31,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:31,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891845962] [2024-09-25 00:09:31,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891845962] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:31,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532410589] [2024-09-25 00:09:31,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 00:09:31,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:31,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:31,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:09:31,474 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 00:09:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:31,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-25 00:09:31,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:31,640 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-25 00:09:31,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 00:09:33,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532410589] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:33,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:33,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2024-09-25 00:09:33,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661302322] [2024-09-25 00:09:33,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:33,727 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 00:09:33,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:33,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 00:09:33,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2024-09-25 00:09:33,729 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-25 00:09:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:33,849 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-09-25 00:09:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 00:09:33,850 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) Word has length 55 [2024-09-25 00:09:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:33,851 INFO L225 Difference]: With dead ends: 43 [2024-09-25 00:09:33,851 INFO L226 Difference]: Without dead ends: 39 [2024-09-25 00:09:33,852 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2024-09-25 00:09:33,852 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:33,853 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 116 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:09:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-25 00:09:33,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-25 00:09:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-25 00:09:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-25 00:09:33,859 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-25 00:09:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:33,859 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-25 00:09:33,859 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-25 00:09:33,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:33,860 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-25 00:09:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-25 00:09:33,861 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:33,861 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:33,878 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-25 00:09:34,065 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:34,066 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:34,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:34,066 INFO L85 PathProgramCache]: Analyzing trace with hash 401815421, now seen corresponding path program 8 times [2024-09-25 00:09:34,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:34,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759311169] [2024-09-25 00:09:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:34,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:34,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:34,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:34,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:34,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:34,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:34,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:34,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:34,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:34,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:34,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-25 00:09:34,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:34,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759311169] [2024-09-25 00:09:34,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759311169] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:34,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510653108] [2024-09-25 00:09:34,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:09:34,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:34,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:34,538 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:09:34,541 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 00:09:34,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:09:34,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:34,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-25 00:09:34,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-25 00:09:34,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-25 00:09:37,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510653108] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:37,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:37,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 26 [2024-09-25 00:09:37,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246640111] [2024-09-25 00:09:37,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:37,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-25 00:09:37,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:37,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-25 00:09:37,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2024-09-25 00:09:37,534 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-25 00:09:37,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:37,656 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-25 00:09:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 00:09:37,657 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) Word has length 61 [2024-09-25 00:09:37,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:37,658 INFO L225 Difference]: With dead ends: 46 [2024-09-25 00:09:37,658 INFO L226 Difference]: Without dead ends: 42 [2024-09-25 00:09:37,658 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 00:09:37,659 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:37,659 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 121 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:09:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-25 00:09:37,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-25 00:09:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-25 00:09:37,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-09-25 00:09:37,665 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2024-09-25 00:09:37,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:37,665 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-09-25 00:09:37,665 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-25 00:09:37,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-09-25 00:09:37,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-25 00:09:37,671 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:37,671 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:37,689 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 00:09:37,875 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:37,876 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:37,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:37,877 INFO L85 PathProgramCache]: Analyzing trace with hash -281594161, now seen corresponding path program 9 times [2024-09-25 00:09:37,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:37,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447971609] [2024-09-25 00:09:37,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:37,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:37,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:37,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:38,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:38,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:38,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:38,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:38,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:38,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:38,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:38,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:38,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:38,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:38,396 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-09-25 00:09:38,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:38,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447971609] [2024-09-25 00:09:38,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447971609] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:38,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809148625] [2024-09-25 00:09:38,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:09:38,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:38,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:38,400 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:09:38,406 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 00:09:38,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-25 00:09:38,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:38,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-25 00:09:38,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-25 00:09:38,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 00:09:42,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809148625] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:42,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:42,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 28 [2024-09-25 00:09:42,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195474656] [2024-09-25 00:09:42,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:42,363 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-25 00:09:42,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:42,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-25 00:09:42,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2024-09-25 00:09:42,365 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2024-09-25 00:09:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:42,502 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-09-25 00:09:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 00:09:42,502 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) Word has length 67 [2024-09-25 00:09:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:42,503 INFO L225 Difference]: With dead ends: 49 [2024-09-25 00:09:42,503 INFO L226 Difference]: Without dead ends: 45 [2024-09-25 00:09:42,504 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=909, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 00:09:42,504 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:42,505 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 144 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:09:42,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-25 00:09:42,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-25 00:09:42,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-25 00:09:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-25 00:09:42,511 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2024-09-25 00:09:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:42,511 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-25 00:09:42,511 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2024-09-25 00:09:42,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:42,512 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-25 00:09:42,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-25 00:09:42,513 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:42,513 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:42,530 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-25 00:09:42,716 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-25 00:09:42,717 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:42,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash 132537789, now seen corresponding path program 10 times [2024-09-25 00:09:42,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:42,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285565031] [2024-09-25 00:09:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:42,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:42,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:42,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:42,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:42,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:42,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:43,294 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-25 00:09:43,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:43,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285565031] [2024-09-25 00:09:43,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285565031] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:43,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709706434] [2024-09-25 00:09:43,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:09:43,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:43,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:43,298 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:09:43,299 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 00:09:43,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:09:43,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:43,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-25 00:09:43,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-25 00:09:43,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-25 00:09:48,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709706434] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:48,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:48,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 30 [2024-09-25 00:09:48,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331519938] [2024-09-25 00:09:48,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:48,915 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-25 00:09:48,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:48,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-25 00:09:48,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2024-09-25 00:09:48,917 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2024-09-25 00:09:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:49,051 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-25 00:09:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-25 00:09:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) Word has length 73 [2024-09-25 00:09:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:49,053 INFO L225 Difference]: With dead ends: 52 [2024-09-25 00:09:49,053 INFO L226 Difference]: Without dead ends: 48 [2024-09-25 00:09:49,053 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 144 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=1063, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 00:09:49,054 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:49,054 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 132 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:09:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-25 00:09:49,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-25 00:09:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-25 00:09:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-25 00:09:49,060 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2024-09-25 00:09:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:49,060 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-25 00:09:49,061 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2024-09-25 00:09:49,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:49,061 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-25 00:09:49,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-25 00:09:49,062 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:49,062 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:49,082 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-25 00:09:49,263 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-25 00:09:49,264 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:49,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:49,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2004764559, now seen corresponding path program 11 times [2024-09-25 00:09:49,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:49,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888938090] [2024-09-25 00:09:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:49,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:49,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:49,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:49,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:49,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:49,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:49,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:49,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:49,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:49,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:49,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:49,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:49,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:49,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:49,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:49,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:49,938 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-25 00:09:49,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:49,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888938090] [2024-09-25 00:09:49,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888938090] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:49,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111292516] [2024-09-25 00:09:49,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 00:09:49,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:49,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:49,945 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:09:49,946 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 00:09:50,208 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-25 00:09:50,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:50,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 00:09:50,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-25 00:09:50,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:09:57,007 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-25 00:09:57,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111292516] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:09:57,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:09:57,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 32 [2024-09-25 00:09:57,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285433374] [2024-09-25 00:09:57,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:09:57,008 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-25 00:09:57,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:09:57,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-25 00:09:57,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2024-09-25 00:09:57,010 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2024-09-25 00:09:57,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:09:57,162 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-09-25 00:09:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 00:09:57,164 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) Word has length 79 [2024-09-25 00:09:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:09:57,165 INFO L225 Difference]: With dead ends: 55 [2024-09-25 00:09:57,168 INFO L226 Difference]: Without dead ends: 51 [2024-09-25 00:09:57,169 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 156 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=577, Invalid=1229, Unknown=0, NotChecked=0, Total=1806 [2024-09-25 00:09:57,169 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:09:57,169 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 161 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:09:57,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-25 00:09:57,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-25 00:09:57,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-25 00:09:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-09-25 00:09:57,176 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2024-09-25 00:09:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:09:57,176 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-09-25 00:09:57,177 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2024-09-25 00:09:57,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-09-25 00:09:57,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-25 00:09:57,178 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:09:57,178 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:09:57,196 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-25 00:09:57,382 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:57,383 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:09:57,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:09:57,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1968163843, now seen corresponding path program 12 times [2024-09-25 00:09:57,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:09:57,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808342777] [2024-09-25 00:09:57,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:09:57,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:09:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:09:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:09:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:57,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:57,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:58,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:58,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:58,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:58,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:58,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:58,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:09:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:09:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-25 00:09:58,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:09:58,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808342777] [2024-09-25 00:09:58,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808342777] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:09:58,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403989117] [2024-09-25 00:09:58,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 00:09:58,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:09:58,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:09:58,232 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:09:58,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 00:09:58,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-25 00:09:58,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:09:58,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 00:09:58,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:09:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-25 00:09:58,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:10:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-25 00:10:07,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403989117] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:10:07,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:10:07,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 34 [2024-09-25 00:10:07,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451335782] [2024-09-25 00:10:07,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:10:07,144 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-25 00:10:07,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:10:07,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-25 00:10:07,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 00:10:07,146 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2024-09-25 00:10:07,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:10:07,303 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-09-25 00:10:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 00:10:07,304 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) Word has length 85 [2024-09-25 00:10:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:10:07,305 INFO L225 Difference]: With dead ends: 58 [2024-09-25 00:10:07,305 INFO L226 Difference]: Without dead ends: 54 [2024-09-25 00:10:07,306 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 168 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 00:10:07,306 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:10:07,307 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 171 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:10:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-25 00:10:07,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-25 00:10:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-25 00:10:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-09-25 00:10:07,313 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2024-09-25 00:10:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:10:07,313 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-09-25 00:10:07,314 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2024-09-25 00:10:07,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:07,314 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-09-25 00:10:07,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-25 00:10:07,315 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:10:07,315 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:10:07,334 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-25 00:10:07,516 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-25 00:10:07,516 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:10:07,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:07,516 INFO L85 PathProgramCache]: Analyzing trace with hash 114960463, now seen corresponding path program 13 times [2024-09-25 00:10:07,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:10:07,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138888034] [2024-09-25 00:10:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:10:07,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:10:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:07,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:10:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:07,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:10:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:07,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:07,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:07,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-25 00:10:08,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:10:08,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138888034] [2024-09-25 00:10:08,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138888034] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:10:08,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831325346] [2024-09-25 00:10:08,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 00:10:08,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:10:08,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:10:08,436 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:10:08,439 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 00:10:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:08,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-25 00:10:08,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:10:08,966 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-25 00:10:08,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:10:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-25 00:10:19,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831325346] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:10:19,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:10:19,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 36 [2024-09-25 00:10:19,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483643461] [2024-09-25 00:10:19,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:10:19,733 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-25 00:10:19,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:10:19,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-25 00:10:19,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 00:10:19,734 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2024-09-25 00:10:19,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:10:19,930 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-09-25 00:10:19,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 00:10:19,931 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) Word has length 91 [2024-09-25 00:10:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:10:19,932 INFO L225 Difference]: With dead ends: 61 [2024-09-25 00:10:19,932 INFO L226 Difference]: Without dead ends: 57 [2024-09-25 00:10:19,933 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 180 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=755, Invalid=1597, Unknown=0, NotChecked=0, Total=2352 [2024-09-25 00:10:19,934 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:10:19,934 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 171 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:10:19,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-25 00:10:19,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-25 00:10:19,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2024-09-25 00:10:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-25 00:10:19,945 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2024-09-25 00:10:19,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:10:19,945 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-25 00:10:19,946 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2024-09-25 00:10:19,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:19,946 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-25 00:10:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-25 00:10:19,947 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:10:19,948 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:10:19,967 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-25 00:10:20,151 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-25 00:10:20,152 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:10:20,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:20,153 INFO L85 PathProgramCache]: Analyzing trace with hash -654525891, now seen corresponding path program 14 times [2024-09-25 00:10:20,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:10:20,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53186090] [2024-09-25 00:10:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:10:20,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:10:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:20,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:10:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:20,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:10:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:20,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:20,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:20,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:20,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:20,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:20,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:20,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:20,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:20,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:20,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:21,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:21,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:21,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:21,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-09-25 00:10:21,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:10:21,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53186090] [2024-09-25 00:10:21,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53186090] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:10:21,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268348028] [2024-09-25 00:10:21,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:10:21,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:10:21,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:10:21,121 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:10:21,124 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 00:10:21,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:10:21,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:10:21,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-25 00:10:21,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:10:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-25 00:10:21,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:10:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-25 00:10:35,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268348028] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:10:35,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:10:35,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2024-09-25 00:10:35,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971518907] [2024-09-25 00:10:35,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:10:35,321 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-25 00:10:35,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:10:35,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-25 00:10:35,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 00:10:35,322 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-25 00:10:35,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:10:35,517 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-09-25 00:10:35,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 00:10:35,518 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) Word has length 97 [2024-09-25 00:10:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:10:35,519 INFO L225 Difference]: With dead ends: 64 [2024-09-25 00:10:35,519 INFO L226 Difference]: Without dead ends: 60 [2024-09-25 00:10:35,520 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 192 SyntacticMatches, 15 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=853, Invalid=1799, Unknown=0, NotChecked=0, Total=2652 [2024-09-25 00:10:35,521 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:10:35,521 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 178 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:10:35,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-25 00:10:35,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-25 00:10:35,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 4 states have call successors, (4), 3 states have call predecessors, (4), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2024-09-25 00:10:35,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-09-25 00:10:35,532 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2024-09-25 00:10:35,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:10:35,532 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-09-25 00:10:35,532 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-25 00:10:35,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:35,533 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-09-25 00:10:35,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-25 00:10:35,533 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:10:35,534 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:10:35,559 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-25 00:10:35,735 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-25 00:10:35,735 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:10:35,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:35,736 INFO L85 PathProgramCache]: Analyzing trace with hash -488711921, now seen corresponding path program 15 times [2024-09-25 00:10:35,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:10:35,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245858471] [2024-09-25 00:10:35,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:10:35,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:10:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:35,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:10:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:35,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:10:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-09-25 00:10:36,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:10:36,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245858471] [2024-09-25 00:10:36,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245858471] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:10:36,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419768052] [2024-09-25 00:10:36,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:10:36,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:10:36,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:10:36,950 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:10:36,954 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-25 00:10:37,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-25 00:10:37,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:10:37,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-25 00:10:37,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:10:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-25 00:10:37,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:10:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-25 00:10:53,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419768052] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:10:53,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:10:53,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 35] total 40 [2024-09-25 00:10:53,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608274259] [2024-09-25 00:10:53,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:10:53,950 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-25 00:10:53,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:10:53,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-25 00:10:53,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2024-09-25 00:10:53,952 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2024-09-25 00:10:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:10:54,200 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-09-25 00:10:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 00:10:54,201 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) Word has length 103 [2024-09-25 00:10:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:10:54,202 INFO L225 Difference]: With dead ends: 67 [2024-09-25 00:10:54,202 INFO L226 Difference]: Without dead ends: 63 [2024-09-25 00:10:54,203 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 204 SyntacticMatches, 16 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=957, Invalid=2013, Unknown=0, NotChecked=0, Total=2970 [2024-09-25 00:10:54,204 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 225 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:10:54,204 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 211 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:10:54,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-25 00:10:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-25 00:10:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 4 states have call successors, (4), 3 states have call predecessors, (4), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2024-09-25 00:10:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-09-25 00:10:54,212 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2024-09-25 00:10:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:10:54,212 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-09-25 00:10:54,213 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2024-09-25 00:10:54,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-09-25 00:10:54,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-25 00:10:54,218 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:10:54,218 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:10:54,241 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-25 00:10:54,418 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-25 00:10:54,419 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:10:54,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:10:54,419 INFO L85 PathProgramCache]: Analyzing trace with hash -763891587, now seen corresponding path program 16 times [2024-09-25 00:10:54,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:10:54,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644526756] [2024-09-25 00:10:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:10:54,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:10:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:54,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:10:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:54,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:10:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:54,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:54,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:54,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:54,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:55,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:55,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:55,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:55,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:55,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:55,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:55,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:55,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:55,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:55,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:55,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:55,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:55,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:10:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:10:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-09-25 00:10:55,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:10:55,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644526756] [2024-09-25 00:10:55,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644526756] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:10:55,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149772293] [2024-09-25 00:10:55,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 00:10:55,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:10:55,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:10:55,634 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:10:55,639 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-25 00:10:56,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 00:10:56,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:10:56,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-25 00:10:56,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:10:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-25 00:10:56,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:11:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-25 00:11:16,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149772293] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:11:16,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:11:16,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 37] total 42 [2024-09-25 00:11:16,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85897637] [2024-09-25 00:11:16,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:11:16,308 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-25 00:11:16,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:11:16,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-25 00:11:16,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2024-09-25 00:11:16,310 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2024-09-25 00:11:16,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:11:16,512 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2024-09-25 00:11:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 00:11:16,513 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) Word has length 109 [2024-09-25 00:11:16,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:11:16,515 INFO L225 Difference]: With dead ends: 70 [2024-09-25 00:11:16,515 INFO L226 Difference]: Without dead ends: 66 [2024-09-25 00:11:16,516 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 216 SyntacticMatches, 17 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1067, Invalid=2239, Unknown=0, NotChecked=0, Total=3306 [2024-09-25 00:11:16,516 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 118 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:11:16,517 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 190 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:11:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-25 00:11:16,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-25 00:11:16,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2024-09-25 00:11:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2024-09-25 00:11:16,522 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2024-09-25 00:11:16,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:11:16,523 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2024-09-25 00:11:16,523 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2024-09-25 00:11:16,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:11:16,523 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2024-09-25 00:11:16,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-25 00:11:16,524 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:11:16,524 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:11:16,547 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-25 00:11:16,728 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:11:16,728 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:11:16,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:11:16,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1440720433, now seen corresponding path program 17 times [2024-09-25 00:11:16,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:11:16,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483090983] [2024-09-25 00:11:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:11:16,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:11:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:16,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:11:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:16,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:11:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:17,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:18,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-09-25 00:11:18,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:11:18,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483090983] [2024-09-25 00:11:18,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483090983] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:11:18,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187460799] [2024-09-25 00:11:18,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 00:11:18,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:11:18,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:11:18,044 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:11:18,045 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-25 00:11:19,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-09-25 00:11:19,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:11:19,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-25 00:11:19,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:11:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-25 00:11:19,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:11:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-25 00:11:41,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187460799] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:11:41,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:11:41,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 39] total 44 [2024-09-25 00:11:41,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419192030] [2024-09-25 00:11:41,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:11:41,146 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-25 00:11:41,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:11:41,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-25 00:11:41,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2024-09-25 00:11:41,147 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2024-09-25 00:11:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:11:41,444 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2024-09-25 00:11:41,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-25 00:11:41,449 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) Word has length 115 [2024-09-25 00:11:41,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:11:41,450 INFO L225 Difference]: With dead ends: 73 [2024-09-25 00:11:41,450 INFO L226 Difference]: Without dead ends: 69 [2024-09-25 00:11:41,451 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 228 SyntacticMatches, 18 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1183, Invalid=2477, Unknown=0, NotChecked=0, Total=3660 [2024-09-25 00:11:41,452 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 218 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:11:41,452 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 192 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:11:41,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-25 00:11:41,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-25 00:11:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2024-09-25 00:11:41,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-09-25 00:11:41,459 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2024-09-25 00:11:41,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:11:41,459 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-09-25 00:11:41,459 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2024-09-25 00:11:41,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:11:41,460 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-09-25 00:11:41,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-25 00:11:41,464 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:11:41,464 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:11:41,488 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-25 00:11:41,665 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-25 00:11:41,666 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:11:41,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:11:41,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1110583619, now seen corresponding path program 18 times [2024-09-25 00:11:41,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:11:41,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359201220] [2024-09-25 00:11:41,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:11:41,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:11:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:41,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:11:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:41,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:11:41,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:41,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:42,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:42,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:42,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:42,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:42,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:42,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:42,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:42,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:42,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:42,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:42,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:42,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:42,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:42,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:43,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:43,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:43,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:11:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:11:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-09-25 00:11:43,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:11:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359201220] [2024-09-25 00:11:43,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359201220] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:11:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164323857] [2024-09-25 00:11:43,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 00:11:43,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:11:43,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:11:43,102 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:11:43,103 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-25 00:11:44,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-25 00:11:44,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:11:44,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-25 00:11:44,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:11:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-25 00:11:44,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-25 00:12:09,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164323857] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:12:09,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:12:09,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 41] total 46 [2024-09-25 00:12:09,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632231948] [2024-09-25 00:12:09,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:09,516 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-25 00:12:09,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:09,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-25 00:12:09,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2024-09-25 00:12:09,518 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2024-09-25 00:12:09,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:09,780 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2024-09-25 00:12:09,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 00:12:09,781 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) Word has length 121 [2024-09-25 00:12:09,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:09,782 INFO L225 Difference]: With dead ends: 76 [2024-09-25 00:12:09,782 INFO L226 Difference]: Without dead ends: 72 [2024-09-25 00:12:09,784 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 240 SyntacticMatches, 19 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1305, Invalid=2727, Unknown=0, NotChecked=0, Total=4032 [2024-09-25 00:12:09,784 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 131 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:09,784 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 210 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:09,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-25 00:12:09,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-09-25 00:12:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 21 states have return successors, (22), 21 states have call predecessors, (22), 3 states have call successors, (22) [2024-09-25 00:12:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-09-25 00:12:09,790 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2024-09-25 00:12:09,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:09,790 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-09-25 00:12:09,791 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2024-09-25 00:12:09,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:09,791 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-09-25 00:12:09,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-09-25 00:12:09,792 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:09,792 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:09,819 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-25 00:12:09,996 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:09,997 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:09,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:09,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1808618865, now seen corresponding path program 19 times [2024-09-25 00:12:09,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:09,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149473295] [2024-09-25 00:12:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:09,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:10,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:10,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:12:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:10,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:10,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:10,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:10,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:10,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:10,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:10,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:10,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:10,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:10,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:10,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:10,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:11,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:11,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:11,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:11,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:11,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:11,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:11,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:11,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-09-25 00:12:11,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:11,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149473295] [2024-09-25 00:12:11,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149473295] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:11,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337566331] [2024-09-25 00:12:11,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 00:12:11,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:11,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:11,204 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:12:11,207 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-25 00:12:12,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:12,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-25 00:12:12,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:12,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-09-25 00:12:12,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:12:36,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-09-25 00:12:36,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337566331] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:12:36,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:12:36,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 43] total 48 [2024-09-25 00:12:36,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591258085] [2024-09-25 00:12:36,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:12:36,904 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-25 00:12:36,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:12:36,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-25 00:12:36,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=1659, Unknown=0, NotChecked=0, Total=2256 [2024-09-25 00:12:36,906 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 48 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 48 states have internal predecessors, (93), 24 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) [2024-09-25 00:12:37,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:12:37,109 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2024-09-25 00:12:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-25 00:12:37,109 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 48 states have internal predecessors, (93), 24 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) Word has length 127 [2024-09-25 00:12:37,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:12:37,110 INFO L225 Difference]: With dead ends: 79 [2024-09-25 00:12:37,110 INFO L226 Difference]: Without dead ends: 75 [2024-09-25 00:12:37,111 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 252 SyntacticMatches, 20 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1433, Invalid=2989, Unknown=0, NotChecked=0, Total=4422 [2024-09-25 00:12:37,112 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 167 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:12:37,112 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 234 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:12:37,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-25 00:12:37,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-25 00:12:37,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 22 states have return successors, (23), 22 states have call predecessors, (23), 3 states have call successors, (23) [2024-09-25 00:12:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2024-09-25 00:12:37,117 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2024-09-25 00:12:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:12:37,117 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2024-09-25 00:12:37,117 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 48 states have internal predecessors, (93), 24 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) [2024-09-25 00:12:37,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2024-09-25 00:12:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-25 00:12:37,118 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:12:37,120 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:12:37,139 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-25 00:12:37,320 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:37,321 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:12:37,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:12:37,321 INFO L85 PathProgramCache]: Analyzing trace with hash 145386749, now seen corresponding path program 20 times [2024-09-25 00:12:37,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:12:37,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920856631] [2024-09-25 00:12:37,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:12:37,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:12:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:37,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:12:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:37,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:12:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:37,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:37,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:37,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:37,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:37,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:12:38,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:12:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2024-09-25 00:12:38,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:12:38,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920856631] [2024-09-25 00:12:38,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920856631] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:12:38,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106137574] [2024-09-25 00:12:38,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 00:12:38,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:12:38,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:12:38,571 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:12:38,572 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-25 00:12:40,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 00:12:40,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:12:40,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-25 00:12:40,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:12:40,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-09-25 00:12:40,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 00:13:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-25 00:13:08,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106137574] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 00:13:08,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 00:13:08,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 45] total 50 [2024-09-25 00:13:08,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139376525] [2024-09-25 00:13:08,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 00:13:08,123 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-25 00:13:08,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 00:13:08,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-25 00:13:08,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=1803, Unknown=0, NotChecked=0, Total=2450 [2024-09-25 00:13:08,124 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 50 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 50 states have internal predecessors, (97), 25 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) [2024-09-25 00:13:08,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 00:13:08,360 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2024-09-25 00:13:08,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 00:13:08,360 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 50 states have internal predecessors, (97), 25 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) Word has length 133 [2024-09-25 00:13:08,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 00:13:08,361 INFO L225 Difference]: With dead ends: 82 [2024-09-25 00:13:08,361 INFO L226 Difference]: Without dead ends: 78 [2024-09-25 00:13:08,363 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 264 SyntacticMatches, 21 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1567, Invalid=3263, Unknown=0, NotChecked=0, Total=4830 [2024-09-25 00:13:08,363 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 00:13:08,363 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 243 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 00:13:08,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-25 00:13:08,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-25 00:13:08,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 23 states have return successors, (24), 23 states have call predecessors, (24), 3 states have call successors, (24) [2024-09-25 00:13:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2024-09-25 00:13:08,367 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2024-09-25 00:13:08,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 00:13:08,368 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2024-09-25 00:13:08,368 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 50 states have internal predecessors, (97), 25 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) [2024-09-25 00:13:08,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:08,368 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2024-09-25 00:13:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-09-25 00:13:08,369 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 00:13:08,369 INFO L216 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 00:13:08,389 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-25 00:13:08,572 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-25 00:13:08,572 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 00:13:08,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 00:13:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1314272433, now seen corresponding path program 21 times [2024-09-25 00:13:08,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 00:13:08,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954468365] [2024-09-25 00:13:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 00:13:08,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 00:13:08,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:08,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 00:13:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:08,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 00:13:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:08,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:09,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:10,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-25 00:13:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 00:13:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2024-09-25 00:13:10,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 00:13:10,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954468365] [2024-09-25 00:13:10,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954468365] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 00:13:10,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253793528] [2024-09-25 00:13:10,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 00:13:10,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 00:13:10,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 00:13:10,061 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 00:13:10,062 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-25 00:13:12,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-25 00:13:12,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 00:13:12,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-25 00:13:12,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 00:13:12,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-25 00:13:12,152 INFO L327 TraceCheckSpWp]: Computing backward predicates...