./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/sum_25x0-1.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 ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/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/sum_25x0-1.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 8ec6e434f91e1569e6fad03794f07a751e615694ef413649174052dcc7984987 --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-ca4ee3d-m [2024-09-20 19:51:35,319 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:51:35,393 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:51:35,397 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:51:35,398 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:51:35,426 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:51:35,427 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:51:35,428 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:51:35,428 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:51:35,429 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:51:35,429 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:51:35,429 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:51:35,430 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:51:35,432 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:51:35,433 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:51:35,433 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:51:35,433 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:51:35,434 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:51:35,434 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:51:35,434 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:51:35,434 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:51:35,439 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:51:35,439 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:51:35,439 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:51:35,440 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:51:35,440 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:51:35,440 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:51:35,440 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:51:35,441 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:51:35,441 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:51:35,441 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:51:35,441 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:51:35,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:51:35,450 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:51:35,450 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:51:35,450 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:51:35,450 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:51:35,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:51:35,451 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:51:35,451 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:51:35,451 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:51:35,452 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:51:35,452 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8ec6e434f91e1569e6fad03794f07a751e615694ef413649174052dcc7984987 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:51:35,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:51:35,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:51:35,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:51:35,720 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:51:35,721 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:51:35,722 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/sum_25x0-1.c [2024-09-20 19:51:37,179 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:51:37,342 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:51:37,342 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/sum_25x0-1.c [2024-09-20 19:51:37,348 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/5a6062902/6cedd402f1634c9dbb3982112934ab1d/FLAG20130c8ed [2024-09-20 19:51:37,360 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/5a6062902/6cedd402f1634c9dbb3982112934ab1d [2024-09-20 19:51:37,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:51:37,367 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:51:37,368 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:51:37,368 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:51:37,374 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:51:37,375 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:51:37" (1/1) ... [2024-09-20 19:51:37,376 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d77ecfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37, skipping insertion in model container [2024-09-20 19:51:37,376 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:51:37" (1/1) ... [2024-09-20 19:51:37,392 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:51:37,541 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/sum_25x0-1.c[481,494] [2024-09-20 19:51:37,546 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:51:37,561 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:51:37,572 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/sum_25x0-1.c[481,494] [2024-09-20 19:51:37,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:51:37,588 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:51:37,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37 WrapperNode [2024-09-20 19:51:37,588 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:51:37,589 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:51:37,589 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:51:37,589 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:51:37,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37" (1/1) ... [2024-09-20 19:51:37,598 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37" (1/1) ... [2024-09-20 19:51:37,604 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:51:37,605 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:51:37,605 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:51:37,605 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:51:37,606 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:51:37,615 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37" (1/1) ... [2024-09-20 19:51:37,615 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37" (1/1) ... [2024-09-20 19:51:37,616 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37" (1/1) ... [2024-09-20 19:51:37,624 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]. [2024-09-20 19:51:37,624 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37" (1/1) ... [2024-09-20 19:51:37,624 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37" (1/1) ... [2024-09-20 19:51:37,626 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37" (1/1) ... [2024-09-20 19:51:37,627 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37" (1/1) ... [2024-09-20 19:51:37,628 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37" (1/1) ... [2024-09-20 19:51:37,628 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37" (1/1) ... [2024-09-20 19:51:37,629 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:51:37,630 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:51:37,630 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:51:37,630 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:51:37,631 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37" (1/1) ... [2024-09-20 19:51:37,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:51:37,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:37,660 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) [2024-09-20 19:51:37,664 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 [2024-09-20 19:51:37,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:51:37,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:51:37,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:51:37,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:51:37,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:51:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-09-20 19:51:37,707 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-09-20 19:51:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:51:37,707 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:51:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:51:37,769 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:51:37,771 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:51:37,912 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-20 19:51:37,912 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:51:37,930 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:51:37,931 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-20 19:51:37,931 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:51:37 BoogieIcfgContainer [2024-09-20 19:51:37,931 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:51:37,934 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:51:37,934 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:51:37,937 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:51:37,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:51:37" (1/3) ... [2024-09-20 19:51:37,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bfc487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:51:37, skipping insertion in model container [2024-09-20 19:51:37,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:37" (2/3) ... [2024-09-20 19:51:37,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14bfc487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:51:37, skipping insertion in model container [2024-09-20 19:51:37,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:51:37" (3/3) ... [2024-09-20 19:51:37,940 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_25x0-1.c [2024-09-20 19:51:37,955 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:51:37,956 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:51:38,001 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:51:38,007 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;@5c7e8b2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:51:38,007 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:51:38,010 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) [2024-09-20 19:51:38,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 19:51:38,015 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:38,016 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:38,016 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:38,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:38,020 INFO L85 PathProgramCache]: Analyzing trace with hash 661201948, now seen corresponding path program 1 times [2024-09-20 19:51:38,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:38,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731534453] [2024-09-20 19:51:38,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:38,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:51:38,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:38,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731534453] [2024-09-20 19:51:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731534453] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:51:38,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:51:38,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:51:38,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970382975] [2024-09-20 19:51:38,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:51:38,336 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:51:38,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:38,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:51:38,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:51:38,364 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) [2024-09-20 19:51:38,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:38,430 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-20 19:51:38,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:51:38,433 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 [2024-09-20 19:51:38,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:38,439 INFO L225 Difference]: With dead ends: 30 [2024-09-20 19:51:38,439 INFO L226 Difference]: Without dead ends: 18 [2024-09-20 19:51:38,442 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 [2024-09-20 19:51:38,444 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:38,445 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 48 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:38,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-20 19:51:38,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-20 19:51:38,472 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) [2024-09-20 19:51:38,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-20 19:51:38,475 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-20 19:51:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:38,475 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-20 19:51:38,475 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) [2024-09-20 19:51:38,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:38,476 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-20 19:51:38,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 19:51:38,478 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:38,478 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:38,478 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:51:38,479 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:38,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:38,480 INFO L85 PathProgramCache]: Analyzing trace with hash 36081636, now seen corresponding path program 1 times [2024-09-20 19:51:38,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:38,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744747643] [2024-09-20 19:51:38,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:38,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:38,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 19:51:38,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:38,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744747643] [2024-09-20 19:51:38,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744747643] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:38,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490030731] [2024-09-20 19:51:38,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:38,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:38,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:38,737 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) [2024-09-20 19:51:38,739 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:51:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:38,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 19:51:38,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 19:51:38,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 19:51:39,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490030731] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:39,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:39,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2024-09-20 19:51:39,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915013609] [2024-09-20 19:51:39,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:39,141 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 19:51:39,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:39,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 19:51:39,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-20 19:51:39,142 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 19:51:39,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:39,216 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-09-20 19:51:39,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:51:39,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) Word has length 19 [2024-09-20 19:51:39,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:39,218 INFO L225 Difference]: With dead ends: 25 [2024-09-20 19:51:39,218 INFO L226 Difference]: Without dead ends: 21 [2024-09-20 19:51:39,219 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:51:39,221 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:39,221 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 59 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:39,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-20 19:51:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-20 19:51:39,228 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) [2024-09-20 19:51:39,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-20 19:51:39,229 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2024-09-20 19:51:39,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:39,230 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-20 19:51:39,230 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 6 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 19:51:39,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:39,231 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-20 19:51:39,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 19:51:39,232 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:39,232 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:39,249 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 19:51:39,432 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 [2024-09-20 19:51:39,433 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:39,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:39,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1588422884, now seen corresponding path program 2 times [2024-09-20 19:51:39,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:39,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333823906] [2024-09-20 19:51:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:39,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:39,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 19:51:39,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:39,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333823906] [2024-09-20 19:51:39,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333823906] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:39,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256335645] [2024-09-20 19:51:39,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:51:39,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:39,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:39,640 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) [2024-09-20 19:51:39,642 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:51:39,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:51:39,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:39,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 19:51:39,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 19:51:39,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 19:51:40,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256335645] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:40,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:40,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2024-09-20 19:51:40,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414612265] [2024-09-20 19:51:40,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:40,061 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 19:51:40,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:40,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 19:51:40,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-09-20 19:51:40,064 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-20 19:51:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:40,131 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-20 19:51:40,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:51:40,132 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 25 [2024-09-20 19:51:40,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:40,133 INFO L225 Difference]: With dead ends: 28 [2024-09-20 19:51:40,133 INFO L226 Difference]: Without dead ends: 24 [2024-09-20 19:51:40,133 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-09-20 19:51:40,134 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:40,135 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:40,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-20 19:51:40,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-20 19:51:40,144 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) [2024-09-20 19:51:40,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-20 19:51:40,145 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2024-09-20 19:51:40,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:40,146 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-20 19:51:40,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-20 19:51:40,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-20 19:51:40,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 19:51:40,148 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:40,148 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:40,165 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 19:51:40,349 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 [2024-09-20 19:51:40,349 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:40,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:40,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1668608796, now seen corresponding path program 3 times [2024-09-20 19:51:40,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:40,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941184580] [2024-09-20 19:51:40,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:40,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:40,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:40,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:40,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:40,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:40,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:40,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:51:40,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:40,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941184580] [2024-09-20 19:51:40,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941184580] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:40,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479182940] [2024-09-20 19:51:40,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:51:40,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:40,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:40,599 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) [2024-09-20 19:51:40,606 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:51:40,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 19:51:40,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:40,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 19:51:40,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:51:40,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:51:41,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479182940] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:41,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:41,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2024-09-20 19:51:41,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027630067] [2024-09-20 19:51:41,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:41,248 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-20 19:51:41,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:41,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-20 19:51:41,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-09-20 19:51:41,249 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-20 19:51:41,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:41,329 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-09-20 19:51:41,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:51:41,330 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) Word has length 31 [2024-09-20 19:51:41,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:41,331 INFO L225 Difference]: With dead ends: 31 [2024-09-20 19:51:41,331 INFO L226 Difference]: Without dead ends: 27 [2024-09-20 19:51:41,332 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:51:41,333 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:41,333 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 70 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-20 19:51:41,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-20 19:51:41,338 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) [2024-09-20 19:51:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-20 19:51:41,339 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2024-09-20 19:51:41,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:41,340 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-20 19:51:41,340 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-20 19:51:41,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-20 19:51:41,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 19:51:41,341 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:41,341 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:41,358 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 19:51:41,545 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 [2024-09-20 19:51:41,546 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:41,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:41,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2054436324, now seen corresponding path program 4 times [2024-09-20 19:51:41,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:41,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440300804] [2024-09-20 19:51:41,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:41,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:41,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:41,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 19:51:41,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:41,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440300804] [2024-09-20 19:51:41,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440300804] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:41,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294838243] [2024-09-20 19:51:41,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:51:41,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:41,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:41,785 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) [2024-09-20 19:51:41,787 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:51:41,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:51:41,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:41,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 19:51:41,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 19:51:41,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 19:51:42,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294838243] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:42,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:42,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2024-09-20 19:51:42,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524861842] [2024-09-20 19:51:42,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:42,641 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 19:51:42,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:42,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 19:51:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-09-20 19:51:42,642 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-20 19:51:42,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:42,712 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-20 19:51:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:51:42,712 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) Word has length 37 [2024-09-20 19:51:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:42,713 INFO L225 Difference]: With dead ends: 34 [2024-09-20 19:51:42,713 INFO L226 Difference]: Without dead ends: 30 [2024-09-20 19:51:42,714 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-09-20 19:51:42,714 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 63 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 [2024-09-20 19:51:42,715 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 63 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:42,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-20 19:51:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-20 19:51:42,720 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) [2024-09-20 19:51:42,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-09-20 19:51:42,721 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-09-20 19:51:42,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:42,721 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-09-20 19:51:42,721 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-20 19:51:42,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-09-20 19:51:42,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 19:51:42,723 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:42,723 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:42,735 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 19:51:42,924 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 [2024-09-20 19:51:42,925 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:42,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:42,925 INFO L85 PathProgramCache]: Analyzing trace with hash 2043660772, now seen corresponding path program 5 times [2024-09-20 19:51:42,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:42,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075705285] [2024-09-20 19:51:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:42,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:42,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:42,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:43,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:43,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:43,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:43,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:43,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:51:43,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:43,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075705285] [2024-09-20 19:51:43,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075705285] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:43,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427443555] [2024-09-20 19:51:43,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:51:43,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:43,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:43,247 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) [2024-09-20 19:51:43,249 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 19:51:43,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 19:51:43,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:43,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 19:51:43,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:51:43,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:51:44,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427443555] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:44,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:44,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2024-09-20 19:51:44,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262406771] [2024-09-20 19:51:44,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:44,443 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 19:51:44,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:44,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 19:51:44,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2024-09-20 19:51:44,444 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-20 19:51:44,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:44,532 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-09-20 19:51:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 19:51:44,532 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) Word has length 43 [2024-09-20 19:51:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:44,533 INFO L225 Difference]: With dead ends: 37 [2024-09-20 19:51:44,533 INFO L226 Difference]: Without dead ends: 33 [2024-09-20 19:51:44,534 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 86 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2024-09-20 19:51:44,534 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:44,535 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 70 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:44,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-20 19:51:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-20 19:51:44,543 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) [2024-09-20 19:51:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-20 19:51:44,544 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2024-09-20 19:51:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:44,544 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-20 19:51:44,544 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-20 19:51:44,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:44,545 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-20 19:51:44,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 19:51:44,547 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:44,547 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:44,560 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 19:51:44,750 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 [2024-09-20 19:51:44,750 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:44,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:44,751 INFO L85 PathProgramCache]: Analyzing trace with hash 776256796, now seen corresponding path program 6 times [2024-09-20 19:51:44,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:44,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227510912] [2024-09-20 19:51:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:44,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:44,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:44,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:44,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:44,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:44,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:44,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:45,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:45,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:45,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-20 19:51:45,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227510912] [2024-09-20 19:51:45,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227510912] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:45,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539199329] [2024-09-20 19:51:45,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:51:45,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:45,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:45,072 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) [2024-09-20 19:51:45,074 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:51:45,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-20 19:51:45,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:45,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 19:51:45,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-20 19:51:45,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 19:51:46,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539199329] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:46,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:46,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2024-09-20 19:51:46,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027045054] [2024-09-20 19:51:46,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:46,565 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 19:51:46,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:46,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 19:51:46,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2024-09-20 19:51:46,567 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-20 19:51:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:46,647 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-20 19:51:46,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 19:51:46,647 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) Word has length 49 [2024-09-20 19:51:46,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:46,648 INFO L225 Difference]: With dead ends: 40 [2024-09-20 19:51:46,648 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 19:51:46,649 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2024-09-20 19:51:46,650 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:46,650 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 97 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:46,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 19:51:46,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-20 19:51:46,659 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) [2024-09-20 19:51:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-09-20 19:51:46,660 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2024-09-20 19:51:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:46,660 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-09-20 19:51:46,661 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-20 19:51:46,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-09-20 19:51:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 19:51:46,662 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:46,662 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:46,675 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 19:51:46,863 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 [2024-09-20 19:51:46,863 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:46,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:46,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1513830684, now seen corresponding path program 7 times [2024-09-20 19:51:46,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:46,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282757868] [2024-09-20 19:51:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:46,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:46,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:46,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:46,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:46,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-20 19:51:47,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:47,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282757868] [2024-09-20 19:51:47,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282757868] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:47,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862375840] [2024-09-20 19:51:47,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:51:47,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:47,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:47,235 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) [2024-09-20 19:51:47,237 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 19:51:47,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 19:51:47,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-20 19:51:47,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:51:49,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862375840] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:49,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:49,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2024-09-20 19:51:49,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326626291] [2024-09-20 19:51:49,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:49,207 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 19:51:49,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:49,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 19:51:49,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2024-09-20 19:51:49,209 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-20 19:51:49,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:49,304 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-09-20 19:51:49,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 19:51:49,304 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) Word has length 55 [2024-09-20 19:51:49,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:49,305 INFO L225 Difference]: With dead ends: 43 [2024-09-20 19:51:49,306 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 19:51:49,306 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 110 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2024-09-20 19:51:49,307 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:49,307 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 104 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:51:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 19:51:49,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-20 19:51:49,312 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) [2024-09-20 19:51:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-20 19:51:49,313 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-20 19:51:49,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:49,314 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-20 19:51:49,314 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-20 19:51:49,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:49,315 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-20 19:51:49,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 19:51:49,315 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:49,316 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:49,332 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 19:51:49,516 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 [2024-09-20 19:51:49,517 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:49,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:49,517 INFO L85 PathProgramCache]: Analyzing trace with hash 296579100, now seen corresponding path program 8 times [2024-09-20 19:51:49,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:49,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702454727] [2024-09-20 19:51:49,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:49,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:49,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:49,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:49,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:49,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:49,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:49,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:49,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:49,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:49,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:49,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-20 19:51:49,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:49,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702454727] [2024-09-20 19:51:49,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702454727] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:49,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287367458] [2024-09-20 19:51:49,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:51:49,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:49,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:49,972 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) [2024-09-20 19:51:49,973 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 19:51:50,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:51:50,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:50,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 19:51:50,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:50,144 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-20 19:51:50,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 19:51:52,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287367458] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:52,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:52,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2024-09-20 19:51:52,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905005786] [2024-09-20 19:51:52,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:52,548 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 19:51:52,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:52,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 19:51:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2024-09-20 19:51:52,550 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-20 19:51:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:52,692 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-20 19:51:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 19:51:52,693 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) Word has length 61 [2024-09-20 19:51:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:52,694 INFO L225 Difference]: With dead ends: 46 [2024-09-20 19:51:52,694 INFO L226 Difference]: Without dead ends: 42 [2024-09-20 19:51:52,695 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 122 SyntacticMatches, 9 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=678, Unknown=0, NotChecked=0, Total=992 [2024-09-20 19:51:52,696 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:52,696 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 109 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:51:52,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-20 19:51:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-20 19:51:52,701 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) [2024-09-20 19:51:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-09-20 19:51:52,702 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2024-09-20 19:51:52,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:52,702 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-09-20 19:51:52,702 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-20 19:51:52,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:52,703 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-09-20 19:51:52,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-20 19:51:52,704 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:52,704 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:52,720 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 19:51:52,907 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 [2024-09-20 19:51:52,908 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:52,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:52,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1875246108, now seen corresponding path program 9 times [2024-09-20 19:51:52,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:52,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525564936] [2024-09-20 19:51:52,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:52,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:53,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:53,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:53,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:53,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:53,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:53,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:53,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:53,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:53,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:53,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:53,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:53,441 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-20 19:51:53,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:53,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525564936] [2024-09-20 19:51:53,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525564936] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:53,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937147446] [2024-09-20 19:51:53,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:51:53,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:53,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:53,444 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) [2024-09-20 19:51:53,446 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 19:51:53,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-20 19:51:53,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:53,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 19:51:53,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-20 19:51:53,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 19:51:57,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937147446] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:57,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:57,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 26 [2024-09-20 19:51:57,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203381723] [2024-09-20 19:51:57,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:57,021 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-20 19:51:57,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:57,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-20 19:51:57,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-09-20 19:51:57,022 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2024-09-20 19:51:57,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:57,159 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-09-20 19:51:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 19:51:57,159 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) Word has length 67 [2024-09-20 19:51:57,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:57,160 INFO L225 Difference]: With dead ends: 49 [2024-09-20 19:51:57,160 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 19:51:57,161 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 19:51:57,162 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:57,162 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 130 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:51:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 19:51:57,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-20 19:51:57,167 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) [2024-09-20 19:51:57,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-20 19:51:57,168 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2024-09-20 19:51:57,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:57,168 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-20 19:51:57,169 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 26 states have internal predecessors, (51), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2024-09-20 19:51:57,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:57,169 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-20 19:51:57,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-20 19:51:57,170 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:57,170 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:57,185 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 19:51:57,374 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 [2024-09-20 19:51:57,375 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:57,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:57,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1040850148, now seen corresponding path program 10 times [2024-09-20 19:51:57,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:57,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854919489] [2024-09-20 19:51:57,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:57,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:57,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:57,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:57,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:57,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:57,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:57,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:57,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:57,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:57,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:57,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:57,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:58,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-20 19:51:58,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:58,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854919489] [2024-09-20 19:51:58,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854919489] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:58,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557768488] [2024-09-20 19:51:58,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:51:58,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:58,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:58,032 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) [2024-09-20 19:51:58,034 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 19:51:58,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:51:58,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:58,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 19:51:58,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-20 19:51:58,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:02,899 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 19:52:02,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557768488] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:02,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:02,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 25] total 28 [2024-09-20 19:52:02,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297484311] [2024-09-20 19:52:02,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:02,900 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 19:52:02,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:02,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 19:52:02,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2024-09-20 19:52:02,901 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2024-09-20 19:52:03,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:03,182 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-20 19:52:03,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 19:52:03,182 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) Word has length 73 [2024-09-20 19:52:03,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:03,183 INFO L225 Difference]: With dead ends: 52 [2024-09-20 19:52:03,183 INFO L226 Difference]: Without dead ends: 48 [2024-09-20 19:52:03,184 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 146 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=958, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 19:52:03,185 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:03,185 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 116 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:52:03,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-20 19:52:03,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-20 19:52:03,194 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) [2024-09-20 19:52:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-20 19:52:03,195 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2024-09-20 19:52:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:03,197 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-20 19:52:03,197 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 28 states have internal predecessors, (55), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2024-09-20 19:52:03,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-20 19:52:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-20 19:52:03,199 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:03,199 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:03,216 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 19:52:03,403 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 [2024-09-20 19:52:03,404 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:03,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:03,404 INFO L85 PathProgramCache]: Analyzing trace with hash 218071268, now seen corresponding path program 11 times [2024-09-20 19:52:03,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:03,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258384591] [2024-09-20 19:52:03,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:03,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:03,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:03,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:03,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:03,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:03,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:03,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:03,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:03,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:03,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:04,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:04,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:04,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:04,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-20 19:52:04,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:04,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258384591] [2024-09-20 19:52:04,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258384591] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:04,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321202127] [2024-09-20 19:52:04,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:52:04,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:04,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:04,112 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) [2024-09-20 19:52:04,114 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 19:52:04,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-20 19:52:04,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:52:04,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 19:52:04,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-20 19:52:04,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:10,218 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 19:52:10,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321202127] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:10,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:10,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 27] total 30 [2024-09-20 19:52:10,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144141577] [2024-09-20 19:52:10,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:10,219 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-20 19:52:10,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:10,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-20 19:52:10,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2024-09-20 19:52:10,221 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2024-09-20 19:52:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:10,391 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-09-20 19:52:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 19:52:10,392 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) Word has length 79 [2024-09-20 19:52:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:10,394 INFO L225 Difference]: With dead ends: 55 [2024-09-20 19:52:10,394 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 19:52:10,395 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 158 SyntacticMatches, 12 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1116, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 19:52:10,396 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:10,396 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 133 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:52:10,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 19:52:10,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-20 19:52:10,406 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) [2024-09-20 19:52:10,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-09-20 19:52:10,407 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2024-09-20 19:52:10,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:10,408 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-09-20 19:52:10,408 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.107142857142857) internal successors, (59), 30 states have internal predecessors, (59), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2024-09-20 19:52:10,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:10,408 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-09-20 19:52:10,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-20 19:52:10,412 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:10,413 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:10,430 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 19:52:10,613 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 [2024-09-20 19:52:10,613 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:10,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:10,614 INFO L85 PathProgramCache]: Analyzing trace with hash -313649636, now seen corresponding path program 12 times [2024-09-20 19:52:10,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:10,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8236665] [2024-09-20 19:52:10,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:10,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:10,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:10,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:10,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:10,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:11,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:11,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:11,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:11,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:11,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:11,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:11,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:11,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:11,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:11,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:11,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:11,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:11,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-20 19:52:11,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:11,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8236665] [2024-09-20 19:52:11,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8236665] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:11,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352968647] [2024-09-20 19:52:11,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:52:11,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:11,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:11,414 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) [2024-09-20 19:52:11,416 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 19:52:11,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-20 19:52:11,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:52:11,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 19:52:11,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-20 19:52:11,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 19:52:19,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352968647] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:19,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:19,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 29] total 32 [2024-09-20 19:52:19,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068489935] [2024-09-20 19:52:19,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:19,062 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 19:52:19,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:19,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 19:52:19,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=734, Unknown=0, NotChecked=0, Total=992 [2024-09-20 19:52:19,064 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2024-09-20 19:52:19,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:19,250 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-09-20 19:52:19,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 19:52:19,250 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) Word has length 85 [2024-09-20 19:52:19,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:19,251 INFO L225 Difference]: With dead ends: 58 [2024-09-20 19:52:19,251 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 19:52:19,252 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 170 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=606, Invalid=1286, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 19:52:19,252 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 155 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:19,252 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 147 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:52:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 19:52:19,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-20 19:52:19,265 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) [2024-09-20 19:52:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-09-20 19:52:19,266 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2024-09-20 19:52:19,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:19,266 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-09-20 19:52:19,266 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.1) internal successors, (63), 32 states have internal predecessors, (63), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2024-09-20 19:52:19,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-09-20 19:52:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-20 19:52:19,269 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:19,269 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:19,283 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 19:52:19,471 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 [2024-09-20 19:52:19,471 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:19,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:19,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1407532516, now seen corresponding path program 13 times [2024-09-20 19:52:19,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:19,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415852933] [2024-09-20 19:52:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:19,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:19,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:19,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:19,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:19,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:19,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:19,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:19,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-20 19:52:20,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:20,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415852933] [2024-09-20 19:52:20,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415852933] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:20,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191681683] [2024-09-20 19:52:20,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:52:20,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:20,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:20,335 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) [2024-09-20 19:52:20,337 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 19:52:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 19:52:20,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-20 19:52:20,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-20 19:52:29,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191681683] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:29,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:29,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 31] total 34 [2024-09-20 19:52:29,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403482812] [2024-09-20 19:52:29,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:29,989 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-20 19:52:29,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:29,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-20 19:52:29,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=831, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 19:52:29,990 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2024-09-20 19:52:30,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:30,152 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-09-20 19:52:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 19:52:30,152 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) Word has length 91 [2024-09-20 19:52:30,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:30,153 INFO L225 Difference]: With dead ends: 61 [2024-09-20 19:52:30,153 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 19:52:30,154 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 182 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=694, Invalid=1468, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 19:52:30,154 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:30,155 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 147 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:52:30,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 19:52:30,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-20 19:52:30,161 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) [2024-09-20 19:52:30,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-20 19:52:30,161 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2024-09-20 19:52:30,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:30,162 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-20 19:52:30,162 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.09375) internal successors, (67), 34 states have internal predecessors, (67), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2024-09-20 19:52:30,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:30,162 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-20 19:52:30,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-20 19:52:30,163 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:30,163 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:30,179 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 19:52:30,364 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 [2024-09-20 19:52:30,364 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:30,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:30,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1575356700, now seen corresponding path program 14 times [2024-09-20 19:52:30,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:30,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458928435] [2024-09-20 19:52:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:30,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:30,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:30,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:30,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:30,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:30,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:30,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:30,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:30,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:30,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:31,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:31,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:31,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:31,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:31,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:31,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:31,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:31,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:31,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:31,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:31,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-20 19:52:31,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458928435] [2024-09-20 19:52:31,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458928435] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:31,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760289645] [2024-09-20 19:52:31,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:52:31,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:31,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:31,393 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) [2024-09-20 19:52:31,396 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 19:52:31,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:52:31,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:52:31,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-20 19:52:31,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:31,992 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-20 19:52:31,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-20 19:52:43,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760289645] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:43,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:43,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 33] total 36 [2024-09-20 19:52:43,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8246781] [2024-09-20 19:52:43,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:43,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-20 19:52:43,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:43,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-20 19:52:43,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 19:52:43,300 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-20 19:52:43,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:43,494 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-09-20 19:52:43,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 19:52:43,495 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) Word has length 97 [2024-09-20 19:52:43,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:43,496 INFO L225 Difference]: With dead ends: 64 [2024-09-20 19:52:43,496 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 19:52:43,497 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 194 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 19:52:43,497 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 170 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:43,497 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 148 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:52:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 19:52:43,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-20 19:52:43,503 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) [2024-09-20 19:52:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-09-20 19:52:43,504 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2024-09-20 19:52:43,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:43,504 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-09-20 19:52:43,505 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.088235294117647) internal successors, (71), 36 states have internal predecessors, (71), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-20 19:52:43,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-09-20 19:52:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-20 19:52:43,506 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:43,506 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:43,526 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-20 19:52:43,707 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 [2024-09-20 19:52:43,707 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:43,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:43,707 INFO L85 PathProgramCache]: Analyzing trace with hash 12270308, now seen corresponding path program 15 times [2024-09-20 19:52:43,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:43,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455745022] [2024-09-20 19:52:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:43,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:43,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:43,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:43,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-20 19:52:44,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:44,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455745022] [2024-09-20 19:52:44,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455745022] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:44,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857469372] [2024-09-20 19:52:44,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:52:44,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:44,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:44,825 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) [2024-09-20 19:52:44,827 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 19:52:45,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-20 19:52:45,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:52:45,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 19:52:45,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:45,687 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-20 19:52:45,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-20 19:52:59,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857469372] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:59,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:59,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 35] total 38 [2024-09-20 19:52:59,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100023364] [2024-09-20 19:52:59,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:59,767 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-20 19:52:59,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:59,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-20 19:52:59,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1043, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 19:52:59,768 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 20 states have call successors, (21), 1 states have call predecessors, (21), 17 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2024-09-20 19:52:59,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:59,959 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-09-20 19:52:59,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 19:52:59,960 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 20 states have call successors, (21), 1 states have call predecessors, (21), 17 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) Word has length 103 [2024-09-20 19:52:59,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:59,960 INFO L225 Difference]: With dead ends: 67 [2024-09-20 19:52:59,960 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 19:52:59,961 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 206 SyntacticMatches, 16 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=888, Invalid=1868, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 19:52:59,962 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 164 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:59,962 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 150 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:52:59,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 19:52:59,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-20 19:52:59,967 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) [2024-09-20 19:52:59,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-09-20 19:52:59,968 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2024-09-20 19:52:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:59,968 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-09-20 19:52:59,968 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 38 states have internal predecessors, (75), 20 states have call successors, (21), 1 states have call predecessors, (21), 17 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2024-09-20 19:52:59,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:59,969 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-09-20 19:52:59,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-20 19:52:59,969 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:59,969 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:59,987 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 19:53:00,170 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 [2024-09-20 19:53:00,170 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:53:00,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:53:00,170 INFO L85 PathProgramCache]: Analyzing trace with hash -101860324, now seen corresponding path program 16 times [2024-09-20 19:53:00,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:53:00,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484611417] [2024-09-20 19:53:00,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:53:00,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:53:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:00,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:53:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:00,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:53:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:00,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:00,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:00,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:00,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:00,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:00,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:01,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:01,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:01,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:01,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:01,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:01,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:01,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:01,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:01,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:01,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:01,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:01,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-20 19:53:01,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:53:01,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484611417] [2024-09-20 19:53:01,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484611417] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:53:01,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897008648] [2024-09-20 19:53:01,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:53:01,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:53:01,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:53:01,465 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) [2024-09-20 19:53:01,466 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 19:53:02,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:53:02,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:53:02,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 19:53:02,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:53:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-20 19:53:02,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:53:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-20 19:53:19,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897008648] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:53:19,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:53:19,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 37] total 40 [2024-09-20 19:53:19,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410430509] [2024-09-20 19:53:19,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:53:19,479 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-20 19:53:19,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:53:19,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-20 19:53:19,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1158, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 19:53:19,480 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 21 states have call successors, (22), 1 states have call predecessors, (22), 18 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2024-09-20 19:53:19,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:53:19,678 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2024-09-20 19:53:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 19:53:19,678 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 21 states have call successors, (22), 1 states have call predecessors, (22), 18 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) Word has length 109 [2024-09-20 19:53:19,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:53:19,679 INFO L225 Difference]: With dead ends: 70 [2024-09-20 19:53:19,679 INFO L226 Difference]: Without dead ends: 66 [2024-09-20 19:53:19,680 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 218 SyntacticMatches, 17 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=994, Invalid=2086, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 19:53:19,680 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:53:19,680 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 185 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:53:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-20 19:53:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-20 19:53:19,686 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) [2024-09-20 19:53:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2024-09-20 19:53:19,687 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2024-09-20 19:53:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:53:19,687 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2024-09-20 19:53:19,687 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 40 states have internal predecessors, (79), 21 states have call successors, (22), 1 states have call predecessors, (22), 18 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2024-09-20 19:53:19,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:53:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2024-09-20 19:53:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-20 19:53:19,688 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:53:19,688 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:53:19,704 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 19:53:19,892 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 [2024-09-20 19:53:19,892 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:53:19,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:53:19,892 INFO L85 PathProgramCache]: Analyzing trace with hash 324106212, now seen corresponding path program 17 times [2024-09-20 19:53:19,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:53:19,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646676399] [2024-09-20 19:53:19,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:53:19,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:53:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:20,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:53:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:20,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:53:20,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:20,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:20,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:20,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:20,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:20,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:20,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:20,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:20,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:20,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:20,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:20,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:20,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:20,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:20,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:20,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:21,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:21,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:21,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:21,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:21,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-20 19:53:21,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:53:21,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646676399] [2024-09-20 19:53:21,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646676399] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:53:21,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064871008] [2024-09-20 19:53:21,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:53:21,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:53:21,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:53:21,129 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) [2024-09-20 19:53:21,129 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 19:53:22,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-09-20 19:53:22,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:53:22,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-20 19:53:22,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:53:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-20 19:53:22,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:53:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-20 19:53:42,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064871008] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:53:42,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:53:42,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 39] total 42 [2024-09-20 19:53:42,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190021338] [2024-09-20 19:53:42,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:53:42,709 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-20 19:53:42,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:53:42,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-20 19:53:42,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=1279, Unknown=0, NotChecked=0, Total=1722 [2024-09-20 19:53:42,710 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 42 states, 40 states have (on average 2.075) internal successors, (83), 42 states have internal predecessors, (83), 22 states have call successors, (23), 1 states have call predecessors, (23), 19 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2024-09-20 19:53:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:53:42,959 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2024-09-20 19:53:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 19:53:42,960 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.075) internal successors, (83), 42 states have internal predecessors, (83), 22 states have call successors, (23), 1 states have call predecessors, (23), 19 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) Word has length 115 [2024-09-20 19:53:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:53:42,963 INFO L225 Difference]: With dead ends: 73 [2024-09-20 19:53:42,963 INFO L226 Difference]: Without dead ends: 69 [2024-09-20 19:53:42,964 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 230 SyntacticMatches, 18 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1106, Invalid=2316, Unknown=0, NotChecked=0, Total=3422 [2024-09-20 19:53:42,965 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 333 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:53:42,965 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 181 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:53:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-20 19:53:42,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-20 19:53:42,973 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) [2024-09-20 19:53:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-09-20 19:53:42,974 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2024-09-20 19:53:42,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:53:42,974 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-09-20 19:53:42,975 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.075) internal successors, (83), 42 states have internal predecessors, (83), 22 states have call successors, (23), 1 states have call predecessors, (23), 19 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2024-09-20 19:53:42,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:53:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-09-20 19:53:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-20 19:53:42,976 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:53:42,976 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:53:42,999 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-20 19:53:43,176 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 [2024-09-20 19:53:43,177 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:53:43,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:53:43,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1013633252, now seen corresponding path program 18 times [2024-09-20 19:53:43,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:53:43,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959087787] [2024-09-20 19:53:43,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:53:43,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:53:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:43,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:53:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:43,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:53:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:43,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:43,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:43,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:43,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:43,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:43,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:43,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:44,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:44,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:44,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:44,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:44,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:44,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:44,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:44,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:44,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:44,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:44,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:44,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:53:44,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:53:44,396 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-20 19:53:44,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:53:44,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959087787] [2024-09-20 19:53:44,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959087787] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:53:44,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787951127] [2024-09-20 19:53:44,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:53:44,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:53:44,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:53:44,398 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) [2024-09-20 19:53:44,399 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 19:53:45,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-20 19:53:45,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:53:45,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 19:53:45,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:53:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-20 19:53:45,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:54:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-20 19:54:10,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787951127] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:54:10,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:54:10,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 41] total 44 [2024-09-20 19:54:10,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447792685] [2024-09-20 19:54:10,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:54:10,581 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 19:54:10,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:54:10,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 19:54:10,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1406, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 19:54:10,583 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 44 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 44 states have internal predecessors, (87), 23 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2024-09-20 19:54:10,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:54:10,806 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2024-09-20 19:54:10,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 19:54:10,807 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 44 states have internal predecessors, (87), 23 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) Word has length 121 [2024-09-20 19:54:10,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:54:10,808 INFO L225 Difference]: With dead ends: 76 [2024-09-20 19:54:10,808 INFO L226 Difference]: Without dead ends: 72 [2024-09-20 19:54:10,809 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 242 SyntacticMatches, 19 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1224, Invalid=2558, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 19:54:10,810 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:54:10,810 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 193 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:54:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-20 19:54:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-09-20 19:54:10,817 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) [2024-09-20 19:54:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-09-20 19:54:10,818 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2024-09-20 19:54:10,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:54:10,818 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-09-20 19:54:10,819 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0714285714285716) internal successors, (87), 44 states have internal predecessors, (87), 23 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2024-09-20 19:54:10,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:54:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-09-20 19:54:10,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-09-20 19:54:10,820 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:54:10,820 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:54:10,837 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-20 19:54:11,020 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 [2024-09-20 19:54:11,021 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:54:11,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:54:11,021 INFO L85 PathProgramCache]: Analyzing trace with hash -277351196, now seen corresponding path program 19 times [2024-09-20 19:54:11,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:54:11,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68127326] [2024-09-20 19:54:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:54:11,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:54:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:11,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:54:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:11,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:54:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:11,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:11,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:11,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:11,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:11,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:11,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:11,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:11,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:12,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:12,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:12,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:12,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:12,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:12,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:12,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:12,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:12,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:12,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:12,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-09-20 19:54:12,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:54:12,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68127326] [2024-09-20 19:54:12,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68127326] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:54:12,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604445385] [2024-09-20 19:54:12,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:54:12,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:54:12,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:54:12,368 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) [2024-09-20 19:54:12,369 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 19:54:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:13,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-20 19:54:13,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:54:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-09-20 19:54:13,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:54:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-09-20 19:54:43,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604445385] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:54:43,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:54:43,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 43] total 46 [2024-09-20 19:54:43,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349009870] [2024-09-20 19:54:43,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:54:43,461 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-20 19:54:43,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:54:43,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-20 19:54:43,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=531, Invalid=1539, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 19:54:43,462 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 46 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 46 states have internal predecessors, (91), 24 states have call successors, (25), 1 states have call predecessors, (25), 21 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) [2024-09-20 19:54:43,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:54:43,699 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2024-09-20 19:54:43,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 19:54:43,700 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 46 states have internal predecessors, (91), 24 states have call successors, (25), 1 states have call predecessors, (25), 21 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) Word has length 127 [2024-09-20 19:54:43,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:54:43,701 INFO L225 Difference]: With dead ends: 79 [2024-09-20 19:54:43,701 INFO L226 Difference]: Without dead ends: 75 [2024-09-20 19:54:43,702 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 254 SyntacticMatches, 20 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1348, Invalid=2812, Unknown=0, NotChecked=0, Total=4160 [2024-09-20 19:54:43,702 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:54:43,703 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 201 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:54:43,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-20 19:54:43,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-20 19:54:43,708 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) [2024-09-20 19:54:43,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2024-09-20 19:54:43,709 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2024-09-20 19:54:43,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:54:43,709 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2024-09-20 19:54:43,709 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.0681818181818183) internal successors, (91), 46 states have internal predecessors, (91), 24 states have call successors, (25), 1 states have call predecessors, (25), 21 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) [2024-09-20 19:54:43,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:54:43,710 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2024-09-20 19:54:43,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-20 19:54:43,710 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:54:43,710 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:54:43,731 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-20 19:54:43,911 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 [2024-09-20 19:54:43,911 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:54:43,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:54:43,911 INFO L85 PathProgramCache]: Analyzing trace with hash -653499876, now seen corresponding path program 20 times [2024-09-20 19:54:43,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:54:43,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106666173] [2024-09-20 19:54:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:54:43,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:54:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:44,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:54:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:44,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:54:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:44,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:44,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:44,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:44,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:44,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:44,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:44,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:44,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:44,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:44,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:44,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:45,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:45,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:45,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:45,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:45,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:45,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:45,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:45,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:45,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:45,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:45,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:45,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:54:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:54:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-09-20 19:54:45,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:54:45,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106666173] [2024-09-20 19:54:45,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106666173] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:54:45,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014271223] [2024-09-20 19:54:45,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:54:45,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:54:45,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:54:45,410 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) [2024-09-20 19:54:45,411 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 19:54:47,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:54:47,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:54:47,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-20 19:54:47,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:54:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-09-20 19:54:47,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:55:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 1010 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-20 19:55:22,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014271223] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:55:22,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:55:22,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 45] total 48 [2024-09-20 19:55:22,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104212438] [2024-09-20 19:55:22,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:55:22,007 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-20 19:55:22,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:55:22,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-20 19:55:22,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=1678, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 19:55:22,008 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 48 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 48 states have internal predecessors, (95), 25 states have call successors, (26), 1 states have call predecessors, (26), 22 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) [2024-09-20 19:55:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:55:22,259 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2024-09-20 19:55:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 19:55:22,259 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 48 states have internal predecessors, (95), 25 states have call successors, (26), 1 states have call predecessors, (26), 22 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) Word has length 133 [2024-09-20 19:55:22,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:55:22,260 INFO L225 Difference]: With dead ends: 82 [2024-09-20 19:55:22,260 INFO L226 Difference]: Without dead ends: 78 [2024-09-20 19:55:22,262 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 266 SyntacticMatches, 21 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1478, Invalid=3078, Unknown=0, NotChecked=0, Total=4556 [2024-09-20 19:55:22,262 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 171 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:55:22,263 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 205 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:55:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-20 19:55:22,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-20 19:55:22,267 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) [2024-09-20 19:55:22,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2024-09-20 19:55:22,268 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2024-09-20 19:55:22,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:55:22,268 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2024-09-20 19:55:22,269 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.0652173913043477) internal successors, (95), 48 states have internal predecessors, (95), 25 states have call successors, (26), 1 states have call predecessors, (26), 22 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) [2024-09-20 19:55:22,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:55:22,269 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2024-09-20 19:55:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-09-20 19:55:22,270 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:55:22,270 INFO L216 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:55:22,290 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-20 19:55:22,470 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 [2024-09-20 19:55:22,471 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:55:22,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:55:22,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1560195556, now seen corresponding path program 21 times [2024-09-20 19:55:22,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:55:22,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225348445] [2024-09-20 19:55:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:55:22,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:55:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:22,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:55:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:22,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:55:22,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:22,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:23,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:23,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:23,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:23,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:23,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:23,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:23,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:23,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:23,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:23,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:23,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:23,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:23,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:23,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:24,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:24,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:24,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:24,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:24,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:24,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:24,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:24,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:55:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-20 19:55:24,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:55:24,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225348445] [2024-09-20 19:55:24,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225348445] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:55:24,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656738171] [2024-09-20 19:55:24,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:55:24,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:55:24,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:55:24,206 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) [2024-09-20 19:55:24,207 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 19:55:26,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-20 19:55:26,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:55:26,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-20 19:55:26,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:55:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-20 19:55:26,433 INFO L327 TraceCheckSpWp]: Computing backward predicates...