./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d 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/id_i25_o25-1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2409cd2f018515417b0b6bf5d396e4bc80c02540769112137ebf388167bdf776 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 13:07:16,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:07:16,786 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:07:16,792 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:07:16,794 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:07:16,810 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:07:16,810 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:07:16,811 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:07:16,811 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:07:16,811 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:07:16,811 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:07:16,812 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:07:16,812 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:07:16,812 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:07:16,812 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:07:16,813 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:07:16,813 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:07:16,813 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:07:16,813 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:07:16,814 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:07:16,814 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:07:16,816 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:07:16,816 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:07:16,816 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:07:16,817 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:07:16,817 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:07:16,817 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:07:16,817 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:07:16,817 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:07:16,817 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:07:16,817 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:07:16,818 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:07:16,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:07:16,818 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:07:16,818 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:07:16,818 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:07:16,818 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:07:16,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:07:16,819 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:07:16,819 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:07:16,819 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:07:16,819 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:07:16,819 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2409cd2f018515417b0b6bf5d396e4bc80c02540769112137ebf388167bdf776 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 13:07:17,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:07:17,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:07:17,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:07:17,036 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:07:17,036 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:07:17,037 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2024-09-20 13:07:18,204 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:07:18,326 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:07:18,326 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c [2024-09-20 13:07:18,331 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/aa26c3902/68fabaeaff33411099bd35e5dc5d15aa/FLAG400ada82e [2024-09-20 13:07:18,347 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/aa26c3902/68fabaeaff33411099bd35e5dc5d15aa [2024-09-20 13:07:18,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:07:18,351 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 13:07:18,352 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:07:18,353 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:07:18,357 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:07:18,358 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:07:18" (1/1) ... [2024-09-20 13:07:18,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b174673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18, skipping insertion in model container [2024-09-20 13:07:18,359 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:07:18" (1/1) ... [2024-09-20 13:07:18,371 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:07:18,480 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2024-09-20 13:07:18,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:07:18,492 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 13:07:18,501 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i25_o25-1.c[454,467] [2024-09-20 13:07:18,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:07:18,512 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:07:18,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18 WrapperNode [2024-09-20 13:07:18,512 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:07:18,513 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:07:18,513 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:07:18,513 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:07:18,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18" (1/1) ... [2024-09-20 13:07:18,525 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18" (1/1) ... [2024-09-20 13:07:18,529 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 13:07:18,530 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:07:18,530 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:07:18,530 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:07:18,530 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:07:18,537 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18" (1/1) ... [2024-09-20 13:07:18,537 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18" (1/1) ... [2024-09-20 13:07:18,538 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18" (1/1) ... [2024-09-20 13:07:18,547 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 13:07:18,548 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18" (1/1) ... [2024-09-20 13:07:18,548 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18" (1/1) ... [2024-09-20 13:07:18,550 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18" (1/1) ... [2024-09-20 13:07:18,550 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18" (1/1) ... [2024-09-20 13:07:18,551 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18" (1/1) ... [2024-09-20 13:07:18,551 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18" (1/1) ... [2024-09-20 13:07:18,552 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:07:18,553 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:07:18,553 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:07:18,553 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:07:18,553 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18" (1/1) ... [2024-09-20 13:07:18,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:07:18,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:18,590 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 13:07:18,592 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 13:07:18,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:07:18,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 13:07:18,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 13:07:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:07:18,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:07:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 13:07:18,627 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 13:07:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 13:07:18,627 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-20 13:07:18,627 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-20 13:07:18,675 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:07:18,677 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:07:18,782 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-20 13:07:18,783 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:07:18,795 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:07:18,796 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-20 13:07:18,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:07:18 BoogieIcfgContainer [2024-09-20 13:07:18,796 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:07:18,798 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:07:18,798 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:07:18,800 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:07:18,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:07:18" (1/3) ... [2024-09-20 13:07:18,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b466b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:07:18, skipping insertion in model container [2024-09-20 13:07:18,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:07:18" (2/3) ... [2024-09-20 13:07:18,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b466b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:07:18, skipping insertion in model container [2024-09-20 13:07:18,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:07:18" (3/3) ... [2024-09-20 13:07:18,802 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i25_o25-1.c [2024-09-20 13:07:18,814 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:07:18,814 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 13:07:18,850 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:07:18,855 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;@6e6e887f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:07:18,856 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 13:07:18,863 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 13:07:18,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 13:07:18,869 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:18,869 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:07:18,869 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:18,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:18,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2082045565, now seen corresponding path program 1 times [2024-09-20 13:07:18,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:18,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939784465] [2024-09-20 13:07:18,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:18,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,058 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 13:07:19,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:19,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939784465] [2024-09-20 13:07:19,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939784465] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:07:19,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:07:19,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 13:07:19,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888603534] [2024-09-20 13:07:19,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:07:19,066 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:07:19,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:19,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:07:19,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:07:19,084 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 13:07:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:19,124 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-20 13:07:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:07:19,126 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 13:07:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:19,132 INFO L225 Difference]: With dead ends: 30 [2024-09-20 13:07:19,132 INFO L226 Difference]: Without dead ends: 18 [2024-09-20 13:07:19,134 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 13:07:19,136 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:19,137 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:19,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-20 13:07:19,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-20 13:07:19,167 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 13:07:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-20 13:07:19,170 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-20 13:07:19,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:19,170 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-20 13:07:19,170 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 13:07:19,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:19,171 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-20 13:07:19,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 13:07:19,172 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:19,172 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 13:07:19,172 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 13:07:19,172 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:19,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:19,173 INFO L85 PathProgramCache]: Analyzing trace with hash -799337521, now seen corresponding path program 1 times [2024-09-20 13:07:19,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:19,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393466311] [2024-09-20 13:07:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:19,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,381 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 13:07:19,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:19,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393466311] [2024-09-20 13:07:19,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393466311] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:19,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163560550] [2024-09-20 13:07:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:19,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:19,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:19,384 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 13:07:19,385 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 13:07:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:19,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 13:07:19,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:19,479 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 13:07:19,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:19,685 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 13:07:19,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163560550] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:19,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:19,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-09-20 13:07:19,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085201334] [2024-09-20 13:07:19,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:19,688 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 13:07:19,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:19,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 13:07:19,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-20 13:07:19,689 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 13:07:19,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:19,733 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-09-20 13:07:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 13:07:19,734 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) Word has length 19 [2024-09-20 13:07:19,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:19,734 INFO L225 Difference]: With dead ends: 25 [2024-09-20 13:07:19,734 INFO L226 Difference]: Without dead ends: 21 [2024-09-20 13:07:19,735 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:07:19,736 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:19,736 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 50 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:19,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-20 13:07:19,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-20 13:07:19,744 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 13:07:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-20 13:07:19,745 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2024-09-20 13:07:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:19,745 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-20 13:07:19,745 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 13:07:19,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:19,745 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-20 13:07:19,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 13:07:19,749 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:19,749 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 13:07:19,761 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 13:07:19,949 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 13:07:19,950 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:19,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:19,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1955994435, now seen corresponding path program 2 times [2024-09-20 13:07:19,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:19,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454570945] [2024-09-20 13:07:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:19,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 13:07:20,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:20,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454570945] [2024-09-20 13:07:20,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454570945] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:20,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257508098] [2024-09-20 13:07:20,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:07:20,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:20,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:20,131 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 13:07:20,133 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 13:07:20,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:07:20,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:20,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 13:07:20,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:20,223 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 13:07:20,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:20,492 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 13:07:20,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257508098] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:20,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:20,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 14 [2024-09-20 13:07:20,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354898497] [2024-09-20 13:07:20,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:20,493 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-20 13:07:20,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:20,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-20 13:07:20,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-09-20 13:07:20,494 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-20 13:07:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:20,548 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-20 13:07:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 13:07:20,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 25 [2024-09-20 13:07:20,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:20,550 INFO L225 Difference]: With dead ends: 28 [2024-09-20 13:07:20,550 INFO L226 Difference]: Without dead ends: 24 [2024-09-20 13:07:20,550 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2024-09-20 13:07:20,551 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:20,551 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-20 13:07:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-20 13:07:20,554 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 13:07:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-20 13:07:20,555 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2024-09-20 13:07:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:20,555 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-20 13:07:20,556 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-20 13:07:20,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:20,556 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-20 13:07:20,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 13:07:20,557 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:20,557 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 13:07:20,568 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 13:07:20,757 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 13:07:20,757 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:20,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:20,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1072241521, now seen corresponding path program 3 times [2024-09-20 13:07:20,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:20,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376133961] [2024-09-20 13:07:20,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:20,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:20,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:20,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 13:07:20,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:20,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376133961] [2024-09-20 13:07:20,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376133961] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:20,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219631268] [2024-09-20 13:07:20,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:07:20,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:20,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:20,923 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 13:07:20,924 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 13:07:20,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 13:07:20,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:20,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 13:07:20,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:21,009 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 13:07:21,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:21,366 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 13:07:21,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219631268] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:21,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:21,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 16 [2024-09-20 13:07:21,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918706023] [2024-09-20 13:07:21,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:21,367 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 13:07:21,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:21,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 13:07:21,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-09-20 13:07:21,368 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-20 13:07:21,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:21,420 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-09-20 13:07:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:07:21,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) Word has length 31 [2024-09-20 13:07:21,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:21,422 INFO L225 Difference]: With dead ends: 31 [2024-09-20 13:07:21,422 INFO L226 Difference]: Without dead ends: 27 [2024-09-20 13:07:21,423 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-09-20 13:07:21,423 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:21,423 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 74 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:21,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-20 13:07:21,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-20 13:07:21,430 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 13:07:21,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-20 13:07:21,430 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2024-09-20 13:07:21,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:21,431 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-20 13:07:21,431 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-20 13:07:21,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:21,432 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-20 13:07:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 13:07:21,433 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:21,433 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 13:07:21,449 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 13:07:21,633 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 13:07:21,634 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:21,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:21,634 INFO L85 PathProgramCache]: Analyzing trace with hash -790562051, now seen corresponding path program 4 times [2024-09-20 13:07:21,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:21,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591734169] [2024-09-20 13:07:21,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:21,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:21,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:21,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:21,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:21,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:21,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:21,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 13:07:21,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:21,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591734169] [2024-09-20 13:07:21,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591734169] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:21,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849909645] [2024-09-20 13:07:21,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:07:21,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:21,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:21,805 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 13:07:21,806 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 13:07:21,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:07:21,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:21,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 13:07:21,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:21,887 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 13:07:21,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:22,440 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 13:07:22,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849909645] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:22,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:22,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 18 [2024-09-20 13:07:22,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174290162] [2024-09-20 13:07:22,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:22,442 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 13:07:22,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:22,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 13:07:22,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2024-09-20 13:07:22,443 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-20 13:07:22,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:22,508 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-20 13:07:22,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 13:07:22,508 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) Word has length 37 [2024-09-20 13:07:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:22,509 INFO L225 Difference]: With dead ends: 34 [2024-09-20 13:07:22,509 INFO L226 Difference]: Without dead ends: 30 [2024-09-20 13:07:22,509 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2024-09-20 13:07:22,510 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:22,510 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 90 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:22,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-20 13:07:22,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-20 13:07:22,516 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 13:07:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-09-20 13:07:22,517 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-09-20 13:07:22,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:22,518 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-09-20 13:07:22,518 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-20 13:07:22,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:22,519 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-09-20 13:07:22,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 13:07:22,519 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:22,519 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 13:07:22,531 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 13:07:22,720 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 13:07:22,720 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:22,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:22,721 INFO L85 PathProgramCache]: Analyzing trace with hash 446137679, now seen corresponding path program 5 times [2024-09-20 13:07:22,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:22,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358142609] [2024-09-20 13:07:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:22,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:22,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:22,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:22,935 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-20 13:07:22,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:22,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358142609] [2024-09-20 13:07:22,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358142609] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:22,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655836264] [2024-09-20 13:07:22,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 13:07:22,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:22,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:22,937 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 13:07:22,939 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 13:07:22,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 13:07:22,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:22,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 13:07:22,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:23,028 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 13:07:23,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:23,862 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 13:07:23,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655836264] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:23,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:23,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 20 [2024-09-20 13:07:23,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126784821] [2024-09-20 13:07:23,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:23,863 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 13:07:23,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:23,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 13:07:23,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2024-09-20 13:07:23,864 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-20 13:07:23,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:23,944 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-09-20 13:07:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 13:07:23,945 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) Word has length 43 [2024-09-20 13:07:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:23,946 INFO L225 Difference]: With dead ends: 37 [2024-09-20 13:07:23,946 INFO L226 Difference]: Without dead ends: 33 [2024-09-20 13:07:23,946 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2024-09-20 13:07:23,947 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:23,947 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 86 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:23,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-20 13:07:23,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-20 13:07:23,952 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 13:07:23,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-20 13:07:23,953 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2024-09-20 13:07:23,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:23,953 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-20 13:07:23,953 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-20 13:07:23,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:23,954 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-20 13:07:23,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 13:07:23,957 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:23,957 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 13:07:23,968 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 13:07:24,157 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 13:07:24,158 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:24,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:24,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1764409661, now seen corresponding path program 6 times [2024-09-20 13:07:24,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:24,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535653577] [2024-09-20 13:07:24,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:24,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-20 13:07:24,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:24,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535653577] [2024-09-20 13:07:24,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535653577] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:24,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118793960] [2024-09-20 13:07:24,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 13:07:24,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:24,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:24,385 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 13:07:24,386 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 13:07:24,448 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-20 13:07:24,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:24,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 13:07:24,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:24,501 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 13:07:24,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:25,588 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 13:07:25,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118793960] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:25,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:25,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 22 [2024-09-20 13:07:25,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19528090] [2024-09-20 13:07:25,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:25,589 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 13:07:25,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:25,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 13:07:25,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2024-09-20 13:07:25,590 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-20 13:07:25,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:25,659 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-20 13:07:25,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 13:07:25,660 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) Word has length 49 [2024-09-20 13:07:25,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:25,660 INFO L225 Difference]: With dead ends: 40 [2024-09-20 13:07:25,661 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 13:07:25,661 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2024-09-20 13:07:25,662 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:25,662 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:25,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 13:07:25,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-20 13:07:25,666 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 13:07:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-09-20 13:07:25,666 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2024-09-20 13:07:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:25,667 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-09-20 13:07:25,667 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-20 13:07:25,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:25,667 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-09-20 13:07:25,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 13:07:25,668 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:25,668 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 13:07:25,680 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 13:07:25,868 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 13:07:25,869 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:25,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:25,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1097922063, now seen corresponding path program 7 times [2024-09-20 13:07:25,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:25,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623936176] [2024-09-20 13:07:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:25,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:25,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:25,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:25,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:25,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:26,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:26,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:26,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:26,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:26,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-20 13:07:26,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:26,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623936176] [2024-09-20 13:07:26,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623936176] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:26,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415199007] [2024-09-20 13:07:26,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 13:07:26,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:26,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:26,157 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 13:07:26,158 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 13:07:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:26,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 13:07:26,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:26,278 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 13:07:26,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:27,651 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 13:07:27,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415199007] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:27,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:27,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2024-09-20 13:07:27,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873958601] [2024-09-20 13:07:27,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:27,652 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 13:07:27,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 13:07:27,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2024-09-20 13:07:27,653 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-20 13:07:27,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:27,738 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-09-20 13:07:27,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 13:07:27,739 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) Word has length 55 [2024-09-20 13:07:27,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:27,740 INFO L225 Difference]: With dead ends: 43 [2024-09-20 13:07:27,740 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 13:07:27,740 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2024-09-20 13:07:27,741 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:27,741 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 116 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 13:07:27,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-20 13:07:27,748 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 13:07:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-20 13:07:27,751 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-20 13:07:27,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:27,751 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-20 13:07:27,751 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-20 13:07:27,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-20 13:07:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 13:07:27,752 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:27,752 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 13:07:27,766 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 13:07:27,952 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 13:07:27,953 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:27,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:27,953 INFO L85 PathProgramCache]: Analyzing trace with hash 401815421, now seen corresponding path program 8 times [2024-09-20 13:07:27,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:27,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333654838] [2024-09-20 13:07:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:27,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:27,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:27,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:28,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:28,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:28,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:28,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:28,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:28,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:28,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:28,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:28,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:28,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-20 13:07:28,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:28,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333654838] [2024-09-20 13:07:28,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333654838] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:28,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642392686] [2024-09-20 13:07:28,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:07:28,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:28,241 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 13:07:28,242 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 13:07:28,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:07:28,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:28,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 13:07:28,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:28,383 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 13:07:28,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:30,266 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 13:07:30,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642392686] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:30,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:30,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 26 [2024-09-20 13:07:30,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885603890] [2024-09-20 13:07:30,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:30,267 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-20 13:07:30,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:30,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-20 13:07:30,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2024-09-20 13:07:30,270 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-20 13:07:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:30,362 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-20 13:07:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 13:07:30,362 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) Word has length 61 [2024-09-20 13:07:30,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:30,365 INFO L225 Difference]: With dead ends: 46 [2024-09-20 13:07:30,365 INFO L226 Difference]: Without dead ends: 42 [2024-09-20 13:07:30,366 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 13:07:30,366 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:30,367 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 121 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:07:30,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-20 13:07:30,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-20 13:07:30,375 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 13:07:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-09-20 13:07:30,376 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2024-09-20 13:07:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:30,376 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-09-20 13:07:30,377 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-20 13:07:30,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:30,377 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-09-20 13:07:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-20 13:07:30,377 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:30,377 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 13:07:30,391 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 13:07:30,578 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 13:07:30,578 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:30,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:30,579 INFO L85 PathProgramCache]: Analyzing trace with hash -281594161, now seen corresponding path program 9 times [2024-09-20 13:07:30,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:30,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422954915] [2024-09-20 13:07:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:30,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-09-20 13:07:30,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:30,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422954915] [2024-09-20 13:07:30,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422954915] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:30,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244494313] [2024-09-20 13:07:30,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:07:30,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:30,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:30,962 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 13:07:30,964 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 13:07:31,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-20 13:07:31,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:31,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 13:07:31,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:31,147 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 13:07:31,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:33,645 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 13:07:33,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244494313] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:33,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:33,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 28 [2024-09-20 13:07:33,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612587629] [2024-09-20 13:07:33,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:33,647 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 13:07:33,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:33,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 13:07:33,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2024-09-20 13:07:33,649 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2024-09-20 13:07:33,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:33,754 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-09-20 13:07:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 13:07:33,755 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) Word has length 67 [2024-09-20 13:07:33,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:33,755 INFO L225 Difference]: With dead ends: 49 [2024-09-20 13:07:33,755 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 13:07:33,756 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=423, Invalid=909, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 13:07:33,756 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:33,756 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 144 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:07:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 13:07:33,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-20 13:07:33,760 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 13:07:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-20 13:07:33,761 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2024-09-20 13:07:33,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:33,761 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-20 13:07:33,761 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2024-09-20 13:07:33,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-20 13:07:33,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-20 13:07:33,762 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:33,762 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 13:07:33,774 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 13:07:33,962 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 13:07:33,963 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:33,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:33,963 INFO L85 PathProgramCache]: Analyzing trace with hash 132537789, now seen corresponding path program 10 times [2024-09-20 13:07:33,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:33,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105042060] [2024-09-20 13:07:33,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:33,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:33,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-20 13:07:34,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:34,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105042060] [2024-09-20 13:07:34,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105042060] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:34,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388329227] [2024-09-20 13:07:34,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:07:34,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:34,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:34,385 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 13:07:34,386 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 13:07:34,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:07:34,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:34,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 13:07:34,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:34,628 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 13:07:34,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:38,023 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 13:07:38,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388329227] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:38,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:38,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 30 [2024-09-20 13:07:38,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088109192] [2024-09-20 13:07:38,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:38,025 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-20 13:07:38,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:38,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-20 13:07:38,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2024-09-20 13:07:38,026 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2024-09-20 13:07:38,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:38,126 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-20 13:07:38,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 13:07:38,127 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) Word has length 73 [2024-09-20 13:07:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:38,128 INFO L225 Difference]: With dead ends: 52 [2024-09-20 13:07:38,128 INFO L226 Difference]: Without dead ends: 48 [2024-09-20 13:07:38,128 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 144 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=497, Invalid=1063, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 13:07:38,128 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:38,129 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 132 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:38,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-20 13:07:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-20 13:07:38,132 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 13:07:38,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-20 13:07:38,132 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2024-09-20 13:07:38,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:38,133 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-20 13:07:38,133 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2024-09-20 13:07:38,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:38,133 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-20 13:07:38,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-20 13:07:38,136 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:38,136 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 13:07:38,148 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 13:07:38,336 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 13:07:38,336 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:38,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:38,337 INFO L85 PathProgramCache]: Analyzing trace with hash 2004764559, now seen corresponding path program 11 times [2024-09-20 13:07:38,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:38,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606517325] [2024-09-20 13:07:38,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:38,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:38,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:38,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:38,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:38,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:38,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:38,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:38,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:38,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:38,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:38,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:38,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:38,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:38,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:38,835 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-20 13:07:38,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:38,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606517325] [2024-09-20 13:07:38,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606517325] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:38,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508726097] [2024-09-20 13:07:38,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 13:07:38,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:38,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:38,839 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 13:07:38,840 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 13:07:39,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-20 13:07:39,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:39,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 13:07:39,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:39,125 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 13:07:39,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:43,449 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 13:07:43,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508726097] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:43,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:43,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 32 [2024-09-20 13:07:43,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949145770] [2024-09-20 13:07:43,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:43,450 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 13:07:43,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:43,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 13:07:43,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2024-09-20 13:07:43,451 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2024-09-20 13:07:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:43,560 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-09-20 13:07:43,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 13:07:43,561 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) Word has length 79 [2024-09-20 13:07:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:43,561 INFO L225 Difference]: With dead ends: 55 [2024-09-20 13:07:43,561 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 13:07:43,562 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 156 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=577, Invalid=1229, Unknown=0, NotChecked=0, Total=1806 [2024-09-20 13:07:43,562 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:43,563 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 161 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:43,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 13:07:43,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-20 13:07:43,568 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 13:07:43,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-09-20 13:07:43,569 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2024-09-20 13:07:43,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:43,569 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-09-20 13:07:43,569 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2024-09-20 13:07:43,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:43,569 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-09-20 13:07:43,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-20 13:07:43,570 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:43,570 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 13:07:43,584 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 13:07:43,771 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 13:07:43,771 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:43,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:43,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1968163843, now seen corresponding path program 12 times [2024-09-20 13:07:43,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:43,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004980554] [2024-09-20 13:07:43,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:43,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:43,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:43,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:43,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:43,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:44,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:44,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:44,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:44,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:44,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:44,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:44,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:44,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:44,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:44,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:44,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:44,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:44,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:44,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-20 13:07:44,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:44,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004980554] [2024-09-20 13:07:44,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004980554] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:44,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81011944] [2024-09-20 13:07:44,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 13:07:44,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:44,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:44,333 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 13:07:44,334 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 13:07:44,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-20 13:07:44,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:07:44,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 13:07:44,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:44,683 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 13:07:44,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:50,260 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 13:07:50,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81011944] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:50,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:50,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 34 [2024-09-20 13:07:50,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632558214] [2024-09-20 13:07:50,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:50,261 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-20 13:07:50,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:50,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-20 13:07:50,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 13:07:50,262 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2024-09-20 13:07:50,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:50,372 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-09-20 13:07:50,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 13:07:50,372 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) Word has length 85 [2024-09-20 13:07:50,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:50,373 INFO L225 Difference]: With dead ends: 58 [2024-09-20 13:07:50,373 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 13:07:50,374 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 168 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 13:07:50,374 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:50,374 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 171 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:07:50,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 13:07:50,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-20 13:07:50,378 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 13:07:50,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-09-20 13:07:50,379 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2024-09-20 13:07:50,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:50,379 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-09-20 13:07:50,380 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2024-09-20 13:07:50,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:50,380 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-09-20 13:07:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-20 13:07:50,380 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:50,380 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 13:07:50,394 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 13:07:50,581 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 13:07:50,581 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:50,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:50,581 INFO L85 PathProgramCache]: Analyzing trace with hash 114960463, now seen corresponding path program 13 times [2024-09-20 13:07:50,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:50,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660765043] [2024-09-20 13:07:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:50,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:50,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:50,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:50,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:50,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:50,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:50,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:50,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:50,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:50,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:50,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:51,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:51,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:51,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:51,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:51,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:51,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:51,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-20 13:07:51,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:51,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660765043] [2024-09-20 13:07:51,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660765043] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:51,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417724056] [2024-09-20 13:07:51,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 13:07:51,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:51,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:51,172 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 13:07:51,174 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 13:07:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:51,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 13:07:51,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:07:51,590 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 13:07:51,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:07:58,702 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 13:07:58,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417724056] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:07:58,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:07:58,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 36 [2024-09-20 13:07:58,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049075326] [2024-09-20 13:07:58,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:07:58,703 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-20 13:07:58,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:07:58,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-20 13:07:58,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 13:07:58,704 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2024-09-20 13:07:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:07:58,844 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-09-20 13:07:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 13:07:58,845 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) Word has length 91 [2024-09-20 13:07:58,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:07:58,846 INFO L225 Difference]: With dead ends: 61 [2024-09-20 13:07:58,846 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 13:07:58,846 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 180 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=755, Invalid=1597, Unknown=0, NotChecked=0, Total=2352 [2024-09-20 13:07:58,847 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:07:58,847 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 171 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:07:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 13:07:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-20 13:07:58,854 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 13:07:58,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-20 13:07:58,854 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2024-09-20 13:07:58,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:07:58,854 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-20 13:07:58,855 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2024-09-20 13:07:58,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:58,855 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-20 13:07:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-20 13:07:58,856 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:07:58,856 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 13:07:58,869 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 13:07:59,056 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 13:07:59,056 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:07:59,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:07:59,057 INFO L85 PathProgramCache]: Analyzing trace with hash -654525891, now seen corresponding path program 14 times [2024-09-20 13:07:59,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:07:59,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779255218] [2024-09-20 13:07:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:07:59,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:07:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:07:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:07:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:07:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:07:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-09-20 13:07:59,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:07:59,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779255218] [2024-09-20 13:07:59,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779255218] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:07:59,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155106995] [2024-09-20 13:07:59,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:07:59,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:07:59,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:07:59,727 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 13:07:59,728 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 13:08:00,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:08:00,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:08:00,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-20 13:08:00,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:08:00,194 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 13:08:00,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:08:08,937 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 13:08:08,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155106995] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:08:08,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:08:08,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2024-09-20 13:08:08,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616566192] [2024-09-20 13:08:08,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:08:08,938 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-20 13:08:08,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:08:08,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-20 13:08:08,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 13:08:08,939 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-20 13:08:09,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:08:09,076 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-09-20 13:08:09,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 13:08:09,076 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) Word has length 97 [2024-09-20 13:08:09,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:08:09,077 INFO L225 Difference]: With dead ends: 64 [2024-09-20 13:08:09,077 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 13:08:09,078 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 192 SyntacticMatches, 15 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1799, Unknown=0, NotChecked=0, Total=2652 [2024-09-20 13:08:09,078 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:08:09,078 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 178 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:08:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 13:08:09,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-20 13:08:09,081 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 13:08:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-09-20 13:08:09,082 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2024-09-20 13:08:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:08:09,082 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-09-20 13:08:09,082 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-20 13:08:09,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:09,083 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-09-20 13:08:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-20 13:08:09,083 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:08:09,083 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 13:08:09,098 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-20 13:08:09,284 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 13:08:09,284 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:08:09,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:09,284 INFO L85 PathProgramCache]: Analyzing trace with hash -488711921, now seen corresponding path program 15 times [2024-09-20 13:08:09,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:08:09,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285663676] [2024-09-20 13:08:09,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:08:09,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:08:09,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:08:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:08:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:09,993 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-09-20 13:08:09,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:08:09,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285663676] [2024-09-20 13:08:09,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285663676] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:08:09,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835472918] [2024-09-20 13:08:09,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:08:09,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:08:09,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:08:09,996 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 13:08:09,996 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 13:08:10,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-20 13:08:10,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:08:10,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 13:08:10,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:08:10,640 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 13:08:10,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:08:21,516 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 13:08:21,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835472918] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:08:21,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:08:21,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 35] total 40 [2024-09-20 13:08:21,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440715431] [2024-09-20 13:08:21,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:08:21,517 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-20 13:08:21,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:08:21,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-20 13:08:21,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 13:08:21,519 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2024-09-20 13:08:21,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:08:21,679 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-09-20 13:08:21,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 13:08:21,679 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) Word has length 103 [2024-09-20 13:08:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:08:21,680 INFO L225 Difference]: With dead ends: 67 [2024-09-20 13:08:21,680 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 13:08:21,681 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 204 SyntacticMatches, 16 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=957, Invalid=2013, Unknown=0, NotChecked=0, Total=2970 [2024-09-20 13:08:21,681 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 225 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:08:21,682 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 211 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:08:21,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 13:08:21,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-20 13:08:21,685 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 13:08:21,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-09-20 13:08:21,685 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2024-09-20 13:08:21,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:08:21,686 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-09-20 13:08:21,686 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2024-09-20 13:08:21,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:21,686 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-09-20 13:08:21,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-20 13:08:21,687 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:08:21,687 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 13:08:21,702 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 13:08:21,887 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 13:08:21,887 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:08:21,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:21,888 INFO L85 PathProgramCache]: Analyzing trace with hash -763891587, now seen corresponding path program 16 times [2024-09-20 13:08:21,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:08:21,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991451547] [2024-09-20 13:08:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:08:21,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:08:21,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:21,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:08:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:21,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:08:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:22,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:22,746 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-09-20 13:08:22,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:08:22,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991451547] [2024-09-20 13:08:22,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991451547] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:08:22,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307105237] [2024-09-20 13:08:22,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:08:22,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:08:22,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:08:22,749 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 13:08:22,751 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 13:08:23,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:08:23,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:08:23,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 13:08:23,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:08:23,455 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 13:08:23,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:08:36,576 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 13:08:36,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307105237] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:08:36,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:08:36,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 37] total 42 [2024-09-20 13:08:36,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004824568] [2024-09-20 13:08:36,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:08:36,576 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-20 13:08:36,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:08:36,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-20 13:08:36,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2024-09-20 13:08:36,577 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2024-09-20 13:08:36,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:08:36,718 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2024-09-20 13:08:36,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 13:08:36,718 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) Word has length 109 [2024-09-20 13:08:36,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:08:36,719 INFO L225 Difference]: With dead ends: 70 [2024-09-20 13:08:36,719 INFO L226 Difference]: Without dead ends: 66 [2024-09-20 13:08:36,720 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 216 SyntacticMatches, 17 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1067, Invalid=2239, Unknown=0, NotChecked=0, Total=3306 [2024-09-20 13:08:36,720 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 118 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:08:36,720 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 190 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:08:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-20 13:08:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-20 13:08:36,725 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 13:08:36,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2024-09-20 13:08:36,725 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2024-09-20 13:08:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:08:36,726 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2024-09-20 13:08:36,726 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2024-09-20 13:08:36,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2024-09-20 13:08:36,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-20 13:08:36,726 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:08:36,727 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 13:08:36,744 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 13:08:36,927 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 13:08:36,927 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:08:36,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:36,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1440720433, now seen corresponding path program 17 times [2024-09-20 13:08:36,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:08:36,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565750946] [2024-09-20 13:08:36,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:08:36,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:08:36,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:08:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:08:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:37,828 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-09-20 13:08:37,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:08:37,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565750946] [2024-09-20 13:08:37,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565750946] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:08:37,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550625527] [2024-09-20 13:08:37,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 13:08:37,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:08:37,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:08:37,830 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 13:08:37,830 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 13:08:38,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-09-20 13:08:38,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:08:38,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-20 13:08:38,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:08:38,672 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 13:08:38,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:08:54,436 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 13:08:54,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550625527] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:08:54,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:08:54,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 39] total 44 [2024-09-20 13:08:54,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202957349] [2024-09-20 13:08:54,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:08:54,436 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 13:08:54,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:08:54,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 13:08:54,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 13:08:54,455 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2024-09-20 13:08:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:08:54,667 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2024-09-20 13:08:54,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 13:08:54,668 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) Word has length 115 [2024-09-20 13:08:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:08:54,669 INFO L225 Difference]: With dead ends: 73 [2024-09-20 13:08:54,669 INFO L226 Difference]: Without dead ends: 69 [2024-09-20 13:08:54,670 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 228 SyntacticMatches, 18 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1183, Invalid=2477, Unknown=0, NotChecked=0, Total=3660 [2024-09-20 13:08:54,670 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 218 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:08:54,670 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 192 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:08:54,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-20 13:08:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-20 13:08:54,676 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 13:08:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-09-20 13:08:54,677 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2024-09-20 13:08:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:08:54,677 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-09-20 13:08:54,677 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2024-09-20 13:08:54,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-09-20 13:08:54,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-20 13:08:54,679 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:08:54,679 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 13:08:54,699 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 13:08:54,880 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 13:08:54,880 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:08:54,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:08:54,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1110583619, now seen corresponding path program 18 times [2024-09-20 13:08:54,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:08:54,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662624896] [2024-09-20 13:08:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:08:54,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:08:54,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:54,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:08:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:54,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:08:55,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:08:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:08:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-09-20 13:08:55,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:08:55,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662624896] [2024-09-20 13:08:55,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662624896] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:08:55,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557283088] [2024-09-20 13:08:55,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 13:08:55,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:08:55,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:08:55,865 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 13:08:55,866 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 13:08:56,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-20 13:08:56,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:08:56,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 13:08:56,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:08:56,934 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 13:08:56,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:09:16,246 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 13:09:16,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557283088] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:09:16,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:09:16,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 41] total 46 [2024-09-20 13:09:16,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358687374] [2024-09-20 13:09:16,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:09:16,247 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-20 13:09:16,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:09:16,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-20 13:09:16,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 13:09:16,248 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2024-09-20 13:09:16,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:09:16,414 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2024-09-20 13:09:16,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 13:09:16,414 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) Word has length 121 [2024-09-20 13:09:16,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:09:16,415 INFO L225 Difference]: With dead ends: 76 [2024-09-20 13:09:16,415 INFO L226 Difference]: Without dead ends: 72 [2024-09-20 13:09:16,416 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 240 SyntacticMatches, 19 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2727, Unknown=0, NotChecked=0, Total=4032 [2024-09-20 13:09:16,416 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 131 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:09:16,417 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 210 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:09:16,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-20 13:09:16,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-09-20 13:09:16,420 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 13:09:16,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-09-20 13:09:16,420 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2024-09-20 13:09:16,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:09:16,420 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-09-20 13:09:16,421 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2024-09-20 13:09:16,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:09:16,421 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-09-20 13:09:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-09-20 13:09:16,422 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:09:16,422 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 13:09:16,439 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 13:09:16,622 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 13:09:16,622 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:09:16,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:09:16,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1808618865, now seen corresponding path program 19 times [2024-09-20 13:09:16,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:09:16,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892022436] [2024-09-20 13:09:16,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:09:16,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:09:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:16,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:09:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:16,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:09:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:16,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:16,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-09-20 13:09:17,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:09:17,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892022436] [2024-09-20 13:09:17,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892022436] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:09:17,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688917191] [2024-09-20 13:09:17,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 13:09:17,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:09:17,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:09:17,690 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 13:09:17,691 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 13:09:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:18,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-20 13:09:18,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:09:18,972 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 13:09:18,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:09:42,298 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 13:09:42,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688917191] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:09:42,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:09:42,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 43] total 48 [2024-09-20 13:09:42,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473571289] [2024-09-20 13:09:42,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:09:42,299 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-20 13:09:42,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:09:42,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-20 13:09:42,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=1659, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 13:09:42,300 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 48 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 48 states have internal predecessors, (93), 24 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) [2024-09-20 13:09:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:09:42,487 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2024-09-20 13:09:42,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 13:09:42,487 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 48 states have internal predecessors, (93), 24 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) Word has length 127 [2024-09-20 13:09:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:09:42,490 INFO L225 Difference]: With dead ends: 79 [2024-09-20 13:09:42,490 INFO L226 Difference]: Without dead ends: 75 [2024-09-20 13:09:42,491 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 252 SyntacticMatches, 20 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1433, Invalid=2989, Unknown=0, NotChecked=0, Total=4422 [2024-09-20 13:09:42,492 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 167 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:09:42,492 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 234 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:09:42,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-20 13:09:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-20 13:09:42,495 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 13:09:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2024-09-20 13:09:42,495 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2024-09-20 13:09:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:09:42,496 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2024-09-20 13:09:42,496 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 48 states have internal predecessors, (93), 24 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (60), 21 states have call predecessors, (60), 24 states have call successors, (60) [2024-09-20 13:09:42,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:09:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2024-09-20 13:09:42,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-20 13:09:42,497 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:09:42,497 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 13:09:42,514 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-20 13:09:42,697 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 13:09:42,698 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:09:42,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:09:42,698 INFO L85 PathProgramCache]: Analyzing trace with hash 145386749, now seen corresponding path program 20 times [2024-09-20 13:09:42,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:09:42,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689314472] [2024-09-20 13:09:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:09:42,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:09:42,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:42,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:09:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:42,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:09:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:42,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:09:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:09:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2024-09-20 13:09:43,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:09:43,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689314472] [2024-09-20 13:09:43,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689314472] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:09:43,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505392196] [2024-09-20 13:09:43,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:09:43,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:09:43,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:09:43,871 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 13:09:43,872 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 13:09:45,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:09:45,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:09:45,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-20 13:09:45,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:09:45,342 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 13:09:45,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:10:12,845 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 13:10:12,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505392196] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:10:12,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:10:12,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 45] total 50 [2024-09-20 13:10:12,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420153492] [2024-09-20 13:10:12,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:10:12,845 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-20 13:10:12,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:10:12,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-20 13:10:12,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=1803, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 13:10:12,847 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 50 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 50 states have internal predecessors, (97), 25 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) [2024-09-20 13:10:13,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:10:13,029 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2024-09-20 13:10:13,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 13:10:13,030 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 50 states have internal predecessors, (97), 25 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) Word has length 133 [2024-09-20 13:10:13,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:10:13,031 INFO L225 Difference]: With dead ends: 82 [2024-09-20 13:10:13,031 INFO L226 Difference]: Without dead ends: 78 [2024-09-20 13:10:13,032 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 264 SyntacticMatches, 21 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2083 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1567, Invalid=3263, Unknown=0, NotChecked=0, Total=4830 [2024-09-20 13:10:13,032 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:10:13,033 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 243 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:10:13,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-20 13:10:13,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-20 13:10:13,036 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 13:10:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2024-09-20 13:10:13,037 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2024-09-20 13:10:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:10:13,037 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2024-09-20 13:10:13,037 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 50 states have internal predecessors, (97), 25 states have call successors, (26), 1 states have call predecessors, (26), 23 states have return successors, (63), 22 states have call predecessors, (63), 25 states have call successors, (63) [2024-09-20 13:10:13,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:10:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2024-09-20 13:10:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-09-20 13:10:13,038 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:10:13,038 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 13:10:13,057 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 13:10:13,238 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 13:10:13,239 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:10:13,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:10:13,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1314272433, now seen corresponding path program 21 times [2024-09-20 13:10:13,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:10:13,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467410794] [2024-09-20 13:10:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:10:13,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:10:13,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:13,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:10:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:13,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:10:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:13,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:13,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:13,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:13,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:13,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:13,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 693 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2024-09-20 13:10:14,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:10:14,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467410794] [2024-09-20 13:10:14,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467410794] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:10:14,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215914691] [2024-09-20 13:10:14,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:10:14,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:10:14,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:10:14,538 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 13:10:14,539 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 13:10:16,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-20 13:10:16,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:10:16,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-20 13:10:16,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:10:16,287 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 13:10:16,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:10:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-09-20 13:10:48,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215914691] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:10:48,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:10:48,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 47] total 52 [2024-09-20 13:10:48,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365020460] [2024-09-20 13:10:48,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:10:48,679 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-20 13:10:48,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:10:48,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-20 13:10:48,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=1953, Unknown=0, NotChecked=0, Total=2652 [2024-09-20 13:10:48,681 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 52 states, 50 states have (on average 2.02) internal successors, (101), 52 states have internal predecessors, (101), 26 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (66), 23 states have call predecessors, (66), 26 states have call successors, (66) [2024-09-20 13:10:48,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:10:48,911 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2024-09-20 13:10:48,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 13:10:48,912 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 2.02) internal successors, (101), 52 states have internal predecessors, (101), 26 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (66), 23 states have call predecessors, (66), 26 states have call successors, (66) Word has length 139 [2024-09-20 13:10:48,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:10:48,913 INFO L225 Difference]: With dead ends: 85 [2024-09-20 13:10:48,913 INFO L226 Difference]: Without dead ends: 81 [2024-09-20 13:10:48,914 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 276 SyntacticMatches, 22 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1707, Invalid=3549, Unknown=0, NotChecked=0, Total=5256 [2024-09-20 13:10:48,914 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 398 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:10:48,914 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 228 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:10:48,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-20 13:10:48,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-20 13:10:48,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 53 states have internal predecessors, (53), 4 states have call successors, (4), 3 states have call predecessors, (4), 24 states have return successors, (25), 24 states have call predecessors, (25), 3 states have call successors, (25) [2024-09-20 13:10:48,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2024-09-20 13:10:48,918 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2024-09-20 13:10:48,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:10:48,918 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2024-09-20 13:10:48,918 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 2.02) internal successors, (101), 52 states have internal predecessors, (101), 26 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (66), 23 states have call predecessors, (66), 26 states have call successors, (66) [2024-09-20 13:10:48,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:10:48,919 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2024-09-20 13:10:48,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-09-20 13:10:48,919 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:10:48,919 INFO L216 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:10:48,940 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-20 13:10:49,119 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:10:49,120 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:10:49,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:10:49,120 INFO L85 PathProgramCache]: Analyzing trace with hash 129610557, now seen corresponding path program 22 times [2024-09-20 13:10:49,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:10:49,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50335133] [2024-09-20 13:10:49,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:10:49,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:10:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:49,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:10:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:49,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:10:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:49,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:49,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:49,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:49,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:49,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:49,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:10:50,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:10:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 759 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2024-09-20 13:10:50,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:10:50,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50335133] [2024-09-20 13:10:50,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50335133] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:10:50,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274526128] [2024-09-20 13:10:50,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:10:50,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:10:50,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:10:50,619 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:10:50,620 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 13:10:52,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:10:52,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:10:52,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-20 13:10:52,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:10:52,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2024-09-20 13:10:52,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:11:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1221 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-09-20 13:11:30,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274526128] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:11:30,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:11:30,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 49] total 54 [2024-09-20 13:11:30,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348722810] [2024-09-20 13:11:30,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:11:30,881 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-20 13:11:30,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:11:30,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-20 13:11:30,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=753, Invalid=2109, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 13:11:30,882 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 54 states, 52 states have (on average 2.019230769230769) internal successors, (105), 54 states have internal predecessors, (105), 27 states have call successors, (28), 1 states have call predecessors, (28), 25 states have return successors, (69), 24 states have call predecessors, (69), 27 states have call successors, (69) [2024-09-20 13:11:31,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:11:31,074 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2024-09-20 13:11:31,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-20 13:11:31,075 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 2.019230769230769) internal successors, (105), 54 states have internal predecessors, (105), 27 states have call successors, (28), 1 states have call predecessors, (28), 25 states have return successors, (69), 24 states have call predecessors, (69), 27 states have call successors, (69) Word has length 145 [2024-09-20 13:11:31,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:11:31,075 INFO L225 Difference]: With dead ends: 88 [2024-09-20 13:11:31,076 INFO L226 Difference]: Without dead ends: 84 [2024-09-20 13:11:31,076 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 288 SyntacticMatches, 23 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1853, Invalid=3847, Unknown=0, NotChecked=0, Total=5700 [2024-09-20 13:11:31,077 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 52 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:11:31,077 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 244 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:11:31,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-20 13:11:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-09-20 13:11:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 55 states have internal predecessors, (55), 4 states have call successors, (4), 3 states have call predecessors, (4), 25 states have return successors, (26), 25 states have call predecessors, (26), 3 states have call successors, (26) [2024-09-20 13:11:31,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2024-09-20 13:11:31,081 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2024-09-20 13:11:31,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:11:31,081 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2024-09-20 13:11:31,081 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 2.019230769230769) internal successors, (105), 54 states have internal predecessors, (105), 27 states have call successors, (28), 1 states have call predecessors, (28), 25 states have return successors, (69), 24 states have call predecessors, (69), 27 states have call successors, (69) [2024-09-20 13:11:31,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:11:31,081 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2024-09-20 13:11:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-09-20 13:11:31,082 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:11:31,082 INFO L216 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:11:31,105 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-20 13:11:31,282 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-20 13:11:31,282 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:11:31,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:11:31,283 INFO L85 PathProgramCache]: Analyzing trace with hash 739884047, now seen corresponding path program 23 times [2024-09-20 13:11:31,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:11:31,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229282977] [2024-09-20 13:11:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:11:31,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:11:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:31,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:11:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:31,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:11:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:31,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:31,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:31,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:31,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:11:32,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:11:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 828 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2024-09-20 13:11:32,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:11:32,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229282977] [2024-09-20 13:11:32,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229282977] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:11:32,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034626680] [2024-09-20 13:11:32,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 13:11:32,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:11:32,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:11:32,934 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:11:32,934 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 13:11:35,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-20 13:11:35,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:11:35,339 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-20 13:11:35,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:11:35,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2024-09-20 13:11:35,447 INFO L327 TraceCheckSpWp]: Computing backward predicates...