./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 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/nla-digbench-scaling/egcd2-ll_valuebound5.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 ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 00:24:56,422 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 00:24:56,488 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 00:24:56,492 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 00:24:56,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 00:24:56,511 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 00:24:56,512 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 00:24:56,513 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 00:24:56,513 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 00:24:56,514 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 00:24:56,514 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 00:24:56,514 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 00:24:56,515 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 00:24:56,516 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 00:24:56,516 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 00:24:56,516 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 00:24:56,517 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 00:24:56,517 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 00:24:56,518 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 00:24:56,518 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 00:24:56,518 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 00:24:56,522 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 00:24:56,522 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 00:24:56,522 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 00:24:56,523 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 00:24:56,523 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 00:24:56,523 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 00:24:56,524 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 00:24:56,524 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 00:24:56,524 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 00:24:56,525 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 00:24:56,525 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 00:24:56,525 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 00:24:56,526 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 00:24:56,526 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 00:24:56,526 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 00:24:56,526 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 00:24:56,527 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 00:24:56,527 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 00:24:56,527 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 00:24:56,528 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 00:24:56,528 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 00:24:56,528 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 00:24:56,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 00:24:56,795 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 00:24:56,797 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 00:24:56,798 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 00:24:56,799 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 00:24:56,800 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2024-09-13 00:24:58,395 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 00:24:58,592 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 00:24:58,593 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2024-09-13 00:24:58,600 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/09abdc2e9/110780bf78e44bcaadf3114fa32d0943/FLAGe560de2ed [2024-09-13 00:24:58,613 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/09abdc2e9/110780bf78e44bcaadf3114fa32d0943 [2024-09-13 00:24:58,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 00:24:58,617 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 00:24:58,618 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 00:24:58,618 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 00:24:58,623 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 00:24:58,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 12:24:58" (1/1) ... [2024-09-13 00:24:58,624 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@217a8e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58, skipping insertion in model container [2024-09-13 00:24:58,625 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 12:24:58" (1/1) ... [2024-09-13 00:24:58,644 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 00:24:58,793 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2024-09-13 00:24:58,817 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 00:24:58,830 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 00:24:58,842 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2024-09-13 00:24:58,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 00:24:58,871 INFO L204 MainTranslator]: Completed translation [2024-09-13 00:24:58,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58 WrapperNode [2024-09-13 00:24:58,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 00:24:58,873 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 00:24:58,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 00:24:58,874 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 00:24:58,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58" (1/1) ... [2024-09-13 00:24:58,891 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58" (1/1) ... [2024-09-13 00:24:58,898 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 00:24:58,898 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 00:24:58,899 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 00:24:58,899 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 00:24:58,899 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 00:24:58,909 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58" (1/1) ... [2024-09-13 00:24:58,909 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58" (1/1) ... [2024-09-13 00:24:58,911 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58" (1/1) ... [2024-09-13 00:24:58,927 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]. [2024-09-13 00:24:58,928 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58" (1/1) ... [2024-09-13 00:24:58,928 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58" (1/1) ... [2024-09-13 00:24:58,931 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58" (1/1) ... [2024-09-13 00:24:58,935 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58" (1/1) ... [2024-09-13 00:24:58,936 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58" (1/1) ... [2024-09-13 00:24:58,937 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58" (1/1) ... [2024-09-13 00:24:58,942 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 00:24:58,943 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 00:24:58,943 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 00:24:58,943 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 00:24:58,945 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58" (1/1) ... [2024-09-13 00:24:58,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 00:24:58,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:58,973 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) [2024-09-13 00:24:58,975 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 [2024-09-13 00:24:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 00:24:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 00:24:59,017 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 00:24:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 00:24:59,017 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 00:24:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 00:24:59,017 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 00:24:59,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 00:24:59,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 00:24:59,020 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 00:24:59,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 00:24:59,020 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 00:24:59,078 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 00:24:59,079 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 00:24:59,264 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-13 00:24:59,265 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 00:24:59,288 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 00:24:59,289 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-13 00:24:59,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:24:59 BoogieIcfgContainer [2024-09-13 00:24:59,289 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 00:24:59,292 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 00:24:59,292 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 00:24:59,296 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 00:24:59,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 12:24:58" (1/3) ... [2024-09-13 00:24:59,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed766d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 12:24:59, skipping insertion in model container [2024-09-13 00:24:59,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:58" (2/3) ... [2024-09-13 00:24:59,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ed766d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 12:24:59, skipping insertion in model container [2024-09-13 00:24:59,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:24:59" (3/3) ... [2024-09-13 00:24:59,299 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2024-09-13 00:24:59,317 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 00:24:59,318 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 00:24:59,384 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 00:24:59,397 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;@7b18d340, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 00:24:59,398 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 00:24:59,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-13 00:24:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 00:24:59,416 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:59,417 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:59,418 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:59,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:59,425 INFO L85 PathProgramCache]: Analyzing trace with hash -2011850563, now seen corresponding path program 1 times [2024-09-13 00:24:59,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:59,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118362314] [2024-09-13 00:24:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:59,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:59,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:59,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:24:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:59,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:24:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:59,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:24:59,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:59,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:24:59,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:59,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:24:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:59,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:24:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:59,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:24:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:59,726 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 00:24:59,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:59,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118362314] [2024-09-13 00:24:59,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118362314] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:24:59,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:24:59,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 00:24:59,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319240265] [2024-09-13 00:24:59,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:24:59,756 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 00:24:59,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:59,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 00:24:59,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 00:24:59,789 INFO L87 Difference]: Start difference. First operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 00:24:59,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:59,838 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2024-09-13 00:24:59,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 00:24:59,841 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-09-13 00:24:59,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:59,848 INFO L225 Difference]: With dead ends: 70 [2024-09-13 00:24:59,849 INFO L226 Difference]: Without dead ends: 34 [2024-09-13 00:24:59,854 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 00:24:59,857 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:59,858 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:24:59,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-13 00:24:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-13 00:24:59,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-13 00:24:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-09-13 00:24:59,906 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 42 [2024-09-13 00:24:59,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:59,907 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-09-13 00:24:59,908 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 00:24:59,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:59,909 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-09-13 00:24:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 00:24:59,910 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:59,911 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:59,911 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 00:24:59,911 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:59,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:59,912 INFO L85 PathProgramCache]: Analyzing trace with hash -213832741, now seen corresponding path program 1 times [2024-09-13 00:24:59,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:59,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459423999] [2024-09-13 00:24:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:59,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:00,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:25:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:00,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:25:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:00,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:25:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:00,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:25:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:00,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:25:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:00,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:25:00,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:00,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:25:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:00,294 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 00:25:00,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:00,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459423999] [2024-09-13 00:25:00,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459423999] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:25:00,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465342920] [2024-09-13 00:25:00,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:00,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:00,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:00,299 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) [2024-09-13 00:25:00,302 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 00:25:00,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:00,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-13 00:25:00,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 00:25:00,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:00,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465342920] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:25:00,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:25:00,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-09-13 00:25:00,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091151561] [2024-09-13 00:25:00,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:25:00,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 00:25:00,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 00:25:00,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-09-13 00:25:00,832 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-13 00:25:01,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:01,119 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-09-13 00:25:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:25:01,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 43 [2024-09-13 00:25:01,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:01,122 INFO L225 Difference]: With dead ends: 55 [2024-09-13 00:25:01,123 INFO L226 Difference]: Without dead ends: 47 [2024-09-13 00:25:01,124 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-09-13 00:25:01,126 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:01,127 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 233 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 00:25:01,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-13 00:25:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-13 00:25:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 00:25:01,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2024-09-13 00:25:01,151 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 43 [2024-09-13 00:25:01,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:01,168 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2024-09-13 00:25:01,169 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-13 00:25:01,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:01,169 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2024-09-13 00:25:01,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 00:25:01,170 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:01,171 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:01,193 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-13 00:25:01,371 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 [2024-09-13 00:25:01,372 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:01,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:01,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1967462229, now seen corresponding path program 1 times [2024-09-13 00:25:01,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:01,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529889360] [2024-09-13 00:25:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:01,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:25:01,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713245583] [2024-09-13 00:25:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:01,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:01,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:01,408 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) [2024-09-13 00:25:01,409 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 00:25:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:01,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 00:25:01,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 00:25:01,519 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:25:01,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:01,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529889360] [2024-09-13 00:25:01,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:25:01,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713245583] [2024-09-13 00:25:01,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713245583] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:25:01,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:25:01,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:25:01,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757994223] [2024-09-13 00:25:01,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:25:01,524 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:25:01,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:01,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:25:01,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:25:01,525 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-13 00:25:01,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:01,592 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2024-09-13 00:25:01,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:25:01,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 44 [2024-09-13 00:25:01,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:01,594 INFO L225 Difference]: With dead ends: 65 [2024-09-13 00:25:01,594 INFO L226 Difference]: Without dead ends: 63 [2024-09-13 00:25:01,596 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:25:01,597 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:01,597 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:25:01,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-13 00:25:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-09-13 00:25:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 00:25:01,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-09-13 00:25:01,620 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 44 [2024-09-13 00:25:01,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:01,622 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-09-13 00:25:01,622 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-13 00:25:01,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:01,623 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2024-09-13 00:25:01,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 00:25:01,624 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:01,625 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:01,637 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-13 00:25:01,827 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 [2024-09-13 00:25:01,827 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:01,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:01,828 INFO L85 PathProgramCache]: Analyzing trace with hash -189867411, now seen corresponding path program 1 times [2024-09-13 00:25:01,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:01,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032981552] [2024-09-13 00:25:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:01,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:01,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:25:01,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155646239] [2024-09-13 00:25:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:01,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:01,859 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) [2024-09-13 00:25:01,862 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 00:25:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:01,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:25:01,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 00:25:02,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:25:02,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:02,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032981552] [2024-09-13 00:25:02,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:25:02,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155646239] [2024-09-13 00:25:02,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155646239] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:25:02,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:25:02,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:25:02,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356967679] [2024-09-13 00:25:02,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:25:02,022 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:25:02,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:25:02,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:25:02,024 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 00:25:02,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:02,090 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-09-13 00:25:02,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:25:02,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-13 00:25:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:02,094 INFO L225 Difference]: With dead ends: 61 [2024-09-13 00:25:02,094 INFO L226 Difference]: Without dead ends: 59 [2024-09-13 00:25:02,094 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:25:02,095 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:02,096 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:25:02,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-13 00:25:02,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-09-13 00:25:02,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 00:25:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-09-13 00:25:02,123 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 49 [2024-09-13 00:25:02,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:02,124 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-09-13 00:25:02,124 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 00:25:02,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-09-13 00:25:02,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-13 00:25:02,127 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:02,127 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:02,148 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 00:25:02,328 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 [2024-09-13 00:25:02,328 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:02,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:02,329 INFO L85 PathProgramCache]: Analyzing trace with hash -470549715, now seen corresponding path program 1 times [2024-09-13 00:25:02,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:02,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214871886] [2024-09-13 00:25:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:02,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:25:02,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981033677] [2024-09-13 00:25:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:02,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:02,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:02,378 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) [2024-09-13 00:25:02,379 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 00:25:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:02,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 00:25:02,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-13 00:25:02,594 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:25:02,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:02,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214871886] [2024-09-13 00:25:02,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:25:02,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981033677] [2024-09-13 00:25:02,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981033677] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:25:02,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:25:02,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:25:02,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976431089] [2024-09-13 00:25:02,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:25:02,595 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:25:02,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:02,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:25:02,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:25:02,597 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 00:25:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:02,670 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-09-13 00:25:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:25:02,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2024-09-13 00:25:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:02,672 INFO L225 Difference]: With dead ends: 65 [2024-09-13 00:25:02,672 INFO L226 Difference]: Without dead ends: 63 [2024-09-13 00:25:02,673 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:25:02,675 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:02,677 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 141 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:25:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-13 00:25:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-09-13 00:25:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 00:25:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-13 00:25:02,699 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 59 [2024-09-13 00:25:02,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:02,700 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-13 00:25:02,703 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 00:25:02,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:02,703 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-13 00:25:02,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-13 00:25:02,705 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:02,705 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:02,722 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 00:25:02,906 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 [2024-09-13 00:25:02,906 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:02,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:02,907 INFO L85 PathProgramCache]: Analyzing trace with hash 487403380, now seen corresponding path program 1 times [2024-09-13 00:25:02,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:02,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898874834] [2024-09-13 00:25:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:02,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:25:02,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257105411] [2024-09-13 00:25:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:02,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:02,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:02,929 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) [2024-09-13 00:25:02,931 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 00:25:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:02,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 00:25:02,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 00:25:03,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 00:25:03,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:03,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898874834] [2024-09-13 00:25:03,193 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:25:03,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257105411] [2024-09-13 00:25:03,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257105411] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:25:03,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:25:03,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-13 00:25:03,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639003838] [2024-09-13 00:25:03,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:25:03,195 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 00:25:03,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:03,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 00:25:03,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:25:03,196 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-13 00:25:03,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:03,307 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2024-09-13 00:25:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 00:25:03,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2024-09-13 00:25:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:03,309 INFO L225 Difference]: With dead ends: 90 [2024-09-13 00:25:03,310 INFO L226 Difference]: Without dead ends: 88 [2024-09-13 00:25:03,310 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-13 00:25:03,311 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:03,311 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:25:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-13 00:25:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2024-09-13 00:25:03,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 00:25:03,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-09-13 00:25:03,326 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 66 [2024-09-13 00:25:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:03,326 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-09-13 00:25:03,327 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-13 00:25:03,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-09-13 00:25:03,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-13 00:25:03,328 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:03,328 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:03,345 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-13 00:25:03,529 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 [2024-09-13 00:25:03,530 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:03,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:03,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2098403842, now seen corresponding path program 1 times [2024-09-13 00:25:03,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:03,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606513273] [2024-09-13 00:25:03,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:03,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:03,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:25:03,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:03,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:25:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:03,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:25:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:03,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:25:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:03,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:25:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:03,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:25:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:03,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:25:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:03,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:25:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:03,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:25:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:03,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:25:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:03,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:25:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 00:25:03,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:03,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606513273] [2024-09-13 00:25:03,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606513273] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:25:03,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747351910] [2024-09-13 00:25:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:03,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:03,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:03,760 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) [2024-09-13 00:25:03,763 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 00:25:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:03,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:25:03,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:03,863 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 00:25:03,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 00:25:03,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747351910] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:25:03,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:25:03,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-13 00:25:03,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338441064] [2024-09-13 00:25:03,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:25:03,968 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 00:25:03,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 00:25:03,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-13 00:25:03,969 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-13 00:25:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:04,164 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2024-09-13 00:25:04,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:25:04,164 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2024-09-13 00:25:04,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:04,166 INFO L225 Difference]: With dead ends: 105 [2024-09-13 00:25:04,166 INFO L226 Difference]: Without dead ends: 97 [2024-09-13 00:25:04,167 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-13 00:25:04,167 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:04,168 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 311 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:25:04,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-13 00:25:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-09-13 00:25:04,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-13 00:25:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-09-13 00:25:04,195 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 68 [2024-09-13 00:25:04,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:04,195 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-09-13 00:25:04,196 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-13 00:25:04,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:04,196 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-09-13 00:25:04,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-13 00:25:04,199 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:04,200 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:04,218 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 00:25:04,401 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 [2024-09-13 00:25:04,401 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:04,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:04,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1520512592, now seen corresponding path program 1 times [2024-09-13 00:25:04,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:04,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203150643] [2024-09-13 00:25:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:04,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:25:04,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519802320] [2024-09-13 00:25:04,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:04,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:04,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:04,437 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) [2024-09-13 00:25:04,438 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 00:25:04,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:04,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-13 00:25:04,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-13 00:25:04,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:04,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:04,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203150643] [2024-09-13 00:25:04,689 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:25:04,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519802320] [2024-09-13 00:25:04,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519802320] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:25:04,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:25:04,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-09-13 00:25:04,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615931627] [2024-09-13 00:25:04,690 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:25:04,690 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 00:25:04,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:04,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 00:25:04,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:25:04,691 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-13 00:25:04,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:04,835 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-13 00:25:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 00:25:04,837 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2024-09-13 00:25:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:04,839 INFO L225 Difference]: With dead ends: 123 [2024-09-13 00:25:04,839 INFO L226 Difference]: Without dead ends: 120 [2024-09-13 00:25:04,839 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-13 00:25:04,840 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:04,840 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:25:04,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-13 00:25:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-13 00:25:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 00:25:04,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2024-09-13 00:25:04,879 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 74 [2024-09-13 00:25:04,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:04,879 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2024-09-13 00:25:04,879 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-13 00:25:04,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:04,880 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2024-09-13 00:25:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-13 00:25:04,881 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:04,881 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:04,898 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 00:25:05,081 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 [2024-09-13 00:25:05,082 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:05,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:05,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1071513618, now seen corresponding path program 2 times [2024-09-13 00:25:05,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:05,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743089773] [2024-09-13 00:25:05,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:05,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:25:05,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135341794] [2024-09-13 00:25:05,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:25:05,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:05,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:05,106 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) [2024-09-13 00:25:05,108 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 00:25:05,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:25:05,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:25:05,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 00:25:05,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-13 00:25:05,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:05,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:05,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743089773] [2024-09-13 00:25:05,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:25:05,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135341794] [2024-09-13 00:25:05,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135341794] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:25:05,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:25:05,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 00:25:05,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303565573] [2024-09-13 00:25:05,499 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:25:05,499 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 00:25:05,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:05,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 00:25:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-13 00:25:05,505 INFO L87 Difference]: Start difference. First operand 117 states and 165 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-13 00:25:05,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:05,681 INFO L93 Difference]: Finished difference Result 129 states and 175 transitions. [2024-09-13 00:25:05,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:25:05,682 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2024-09-13 00:25:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:05,684 INFO L225 Difference]: With dead ends: 129 [2024-09-13 00:25:05,684 INFO L226 Difference]: Without dead ends: 127 [2024-09-13 00:25:05,684 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-13 00:25:05,685 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:05,685 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 229 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:25:05,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-13 00:25:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-09-13 00:25:05,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 00:25:05,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2024-09-13 00:25:05,719 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 79 [2024-09-13 00:25:05,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:05,720 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2024-09-13 00:25:05,720 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-13 00:25:05,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:05,720 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2024-09-13 00:25:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-13 00:25:05,721 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:05,722 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:05,739 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 00:25:05,925 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 [2024-09-13 00:25:05,926 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:05,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:05,926 INFO L85 PathProgramCache]: Analyzing trace with hash 807735120, now seen corresponding path program 3 times [2024-09-13 00:25:05,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:05,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236984132] [2024-09-13 00:25:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:05,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:25:05,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [30927718] [2024-09-13 00:25:05,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:25:05,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:05,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:05,946 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) [2024-09-13 00:25:05,955 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 00:25:06,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 00:25:06,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:25:06,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-13 00:25:06,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-13 00:25:06,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:28,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:28,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236984132] [2024-09-13 00:25:28,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:25:28,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30927718] [2024-09-13 00:25:28,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30927718] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:25:28,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:25:28,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-13 00:25:28,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427249037] [2024-09-13 00:25:28,280 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:25:28,281 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 00:25:28,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:28,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 00:25:28,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=539, Unknown=1, NotChecked=0, Total=650 [2024-09-13 00:25:28,284 INFO L87 Difference]: Start difference. First operand 125 states and 171 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-13 00:25:28,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:28,772 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2024-09-13 00:25:28,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:25:28,773 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2024-09-13 00:25:28,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:28,776 INFO L225 Difference]: With dead ends: 133 [2024-09-13 00:25:28,778 INFO L226 Difference]: Without dead ends: 131 [2024-09-13 00:25:28,779 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=163, Invalid=706, Unknown=1, NotChecked=0, Total=870 [2024-09-13 00:25:28,779 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:28,780 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 271 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 00:25:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-13 00:25:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-13 00:25:28,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 00:25:28,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2024-09-13 00:25:28,833 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 84 [2024-09-13 00:25:28,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:28,834 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2024-09-13 00:25:28,834 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-13 00:25:28,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2024-09-13 00:25:28,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-13 00:25:28,836 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:28,836 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:28,855 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 00:25:29,040 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 [2024-09-13 00:25:29,041 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:29,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:29,041 INFO L85 PathProgramCache]: Analyzing trace with hash -607760099, now seen corresponding path program 1 times [2024-09-13 00:25:29,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:29,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246385673] [2024-09-13 00:25:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:29,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:25:29,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007966227] [2024-09-13 00:25:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:29,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:29,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:29,065 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) [2024-09-13 00:25:29,066 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 00:25:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:29,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-13 00:25:29,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-13 00:25:29,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 00:25:30,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:30,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246385673] [2024-09-13 00:25:30,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:25:30,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007966227] [2024-09-13 00:25:30,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007966227] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:25:30,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:25:30,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-13 00:25:30,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116504164] [2024-09-13 00:25:30,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:25:30,339 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:25:30,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:30,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:25:30,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-13 00:25:30,340 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:25:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:32,945 INFO L93 Difference]: Finished difference Result 229 states and 337 transitions. [2024-09-13 00:25:32,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 00:25:32,946 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 90 [2024-09-13 00:25:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:32,949 INFO L225 Difference]: With dead ends: 229 [2024-09-13 00:25:32,949 INFO L226 Difference]: Without dead ends: 225 [2024-09-13 00:25:32,950 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 00:25:32,950 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 75 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:32,950 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 451 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-13 00:25:32,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-13 00:25:33,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2024-09-13 00:25:33,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 96 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2024-09-13 00:25:33,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 328 transitions. [2024-09-13 00:25:33,051 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 328 transitions. Word has length 90 [2024-09-13 00:25:33,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:33,051 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 328 transitions. [2024-09-13 00:25:33,052 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:25:33,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 328 transitions. [2024-09-13 00:25:33,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-13 00:25:33,053 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:33,053 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:33,068 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 00:25:33,253 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 [2024-09-13 00:25:33,254 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:33,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:33,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1117188045, now seen corresponding path program 4 times [2024-09-13 00:25:33,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:33,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449621449] [2024-09-13 00:25:33,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:33,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:25:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:25:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:25:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:25:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:25:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:25:33,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:25:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:25:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:25:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:25:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:25:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 00:25:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 00:25:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 00:25:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 00:25:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-13 00:25:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-09-13 00:25:33,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:33,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449621449] [2024-09-13 00:25:33,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449621449] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:25:33,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:25:33,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:25:33,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031792768] [2024-09-13 00:25:33,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:25:33,432 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:25:33,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:33,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:25:33,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:25:33,433 INFO L87 Difference]: Start difference. First operand 222 states and 328 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-13 00:25:33,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:33,554 INFO L93 Difference]: Finished difference Result 275 states and 404 transitions. [2024-09-13 00:25:33,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 00:25:33,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2024-09-13 00:25:33,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:33,573 INFO L225 Difference]: With dead ends: 275 [2024-09-13 00:25:33,574 INFO L226 Difference]: Without dead ends: 201 [2024-09-13 00:25:33,575 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:25:33,575 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:33,576 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 179 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:25:33,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-13 00:25:33,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2024-09-13 00:25:33,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 98 states have internal predecessors, (112), 80 states have call successors, (80), 14 states have call predecessors, (80), 13 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-13 00:25:33,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2024-09-13 00:25:33,648 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 99 [2024-09-13 00:25:33,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:33,649 INFO L474 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2024-09-13 00:25:33,649 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-13 00:25:33,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2024-09-13 00:25:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-09-13 00:25:33,651 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:33,651 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:33,651 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-13 00:25:33,651 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:33,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:33,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2069519471, now seen corresponding path program 1 times [2024-09-13 00:25:33,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:33,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088821962] [2024-09-13 00:25:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:33,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:25:33,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683110516] [2024-09-13 00:25:33,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:33,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:33,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:33,688 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) [2024-09-13 00:25:33,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 00:25:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:33,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-13 00:25:33,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:34,871 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-09-13 00:25:34,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:35,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:35,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088821962] [2024-09-13 00:25:35,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:25:35,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683110516] [2024-09-13 00:25:35,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683110516] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:25:35,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:25:35,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:25:35,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649882788] [2024-09-13 00:25:35,027 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:25:35,027 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:25:35,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:35,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:25:35,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-09-13 00:25:35,029 INFO L87 Difference]: Start difference. First operand 189 states and 269 transitions. Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-13 00:25:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:35,822 INFO L93 Difference]: Finished difference Result 201 states and 279 transitions. [2024-09-13 00:25:35,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 00:25:35,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 106 [2024-09-13 00:25:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:35,825 INFO L225 Difference]: With dead ends: 201 [2024-09-13 00:25:35,825 INFO L226 Difference]: Without dead ends: 199 [2024-09-13 00:25:35,825 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:25:35,826 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 40 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:35,826 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 352 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 00:25:35,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-09-13 00:25:35,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2024-09-13 00:25:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 104 states have internal predecessors, (118), 80 states have call successors, (80), 16 states have call predecessors, (80), 15 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-13 00:25:35,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 275 transitions. [2024-09-13 00:25:35,914 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 275 transitions. Word has length 106 [2024-09-13 00:25:35,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:35,914 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 275 transitions. [2024-09-13 00:25:35,914 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-13 00:25:35,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 275 transitions. [2024-09-13 00:25:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-13 00:25:35,916 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:35,916 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:35,931 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-13 00:25:36,117 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:36,117 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:36,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:36,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1527784632, now seen corresponding path program 1 times [2024-09-13 00:25:36,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:36,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700401225] [2024-09-13 00:25:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:36,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:25:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:25:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:25:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:25:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:25:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:25:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:25:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:25:36,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:25:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:25:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:25:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 00:25:36,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 00:25:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 00:25:36,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 00:25:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-13 00:25:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-13 00:25:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-13 00:25:36,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-13 00:25:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-13 00:25:36,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 00:25:36,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:36,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700401225] [2024-09-13 00:25:36,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700401225] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:25:36,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565168750] [2024-09-13 00:25:36,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:36,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:36,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:36,315 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) [2024-09-13 00:25:36,317 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 00:25:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:36,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 00:25:36,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-09-13 00:25:36,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 00:25:36,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565168750] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:25:36,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:25:36,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-13 00:25:36,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775535059] [2024-09-13 00:25:36,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:25:36,510 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 00:25:36,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:36,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 00:25:36,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:25:36,511 INFO L87 Difference]: Start difference. First operand 197 states and 275 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-13 00:25:36,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:36,758 INFO L93 Difference]: Finished difference Result 227 states and 317 transitions. [2024-09-13 00:25:36,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 00:25:36,758 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 120 [2024-09-13 00:25:36,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:36,761 INFO L225 Difference]: With dead ends: 227 [2024-09-13 00:25:36,761 INFO L226 Difference]: Without dead ends: 215 [2024-09-13 00:25:36,761 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 278 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-13 00:25:36,762 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:36,762 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 337 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:25:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-09-13 00:25:36,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2024-09-13 00:25:36,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 103 states have internal predecessors, (117), 79 states have call successors, (79), 16 states have call predecessors, (79), 15 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-13 00:25:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 272 transitions. [2024-09-13 00:25:36,842 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 272 transitions. Word has length 120 [2024-09-13 00:25:36,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:36,843 INFO L474 AbstractCegarLoop]: Abstraction has 196 states and 272 transitions. [2024-09-13 00:25:36,843 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-13 00:25:36,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:36,843 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 272 transitions. [2024-09-13 00:25:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-13 00:25:36,846 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:36,846 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:36,864 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-13 00:25:37,046 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 00:25:37,047 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:37,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:37,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2141824020, now seen corresponding path program 2 times [2024-09-13 00:25:37,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:37,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148416041] [2024-09-13 00:25:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:37,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:25:37,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870282931] [2024-09-13 00:25:37,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:25:37,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:37,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:37,076 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) [2024-09-13 00:25:37,077 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 00:25:37,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:25:37,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:25:37,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-13 00:25:37,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 00:25:37,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:37,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:37,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148416041] [2024-09-13 00:25:37,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:25:37,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870282931] [2024-09-13 00:25:37,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870282931] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:25:37,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:25:37,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 00:25:37,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948635421] [2024-09-13 00:25:37,540 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:25:37,540 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 00:25:37,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:37,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 00:25:37,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-13 00:25:37,541 INFO L87 Difference]: Start difference. First operand 196 states and 272 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-13 00:25:37,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:37,768 INFO L93 Difference]: Finished difference Result 230 states and 321 transitions. [2024-09-13 00:25:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:25:37,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 121 [2024-09-13 00:25:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:37,771 INFO L225 Difference]: With dead ends: 230 [2024-09-13 00:25:37,771 INFO L226 Difference]: Without dead ends: 227 [2024-09-13 00:25:37,771 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-13 00:25:37,772 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 23 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:37,772 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 290 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:25:37,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-13 00:25:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2024-09-13 00:25:37,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 118 states have internal predecessors, (135), 91 states have call successors, (91), 17 states have call predecessors, (91), 16 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-13 00:25:37,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 314 transitions. [2024-09-13 00:25:37,848 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 314 transitions. Word has length 121 [2024-09-13 00:25:37,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:37,848 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 314 transitions. [2024-09-13 00:25:37,848 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-13 00:25:37,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:37,849 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 314 transitions. [2024-09-13 00:25:37,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-13 00:25:37,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:37,850 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:37,868 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-13 00:25:38,051 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 00:25:38,051 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:38,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:38,051 INFO L85 PathProgramCache]: Analyzing trace with hash -669028268, now seen corresponding path program 3 times [2024-09-13 00:25:38,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:38,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467051602] [2024-09-13 00:25:38,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:38,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:25:38,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404341847] [2024-09-13 00:25:38,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:25:38,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:38,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:38,081 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) [2024-09-13 00:25:38,082 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 00:25:38,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 00:25:38,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:25:38,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-13 00:25:38,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-13 00:25:38,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:38,966 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-13 00:25:38,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:38,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467051602] [2024-09-13 00:25:38,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:25:38,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404341847] [2024-09-13 00:25:38,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404341847] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:25:38,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:25:38,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-13 00:25:38,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106333226] [2024-09-13 00:25:38,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:25:38,968 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 00:25:38,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:38,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 00:25:38,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-09-13 00:25:38,969 INFO L87 Difference]: Start difference. First operand 224 states and 314 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-13 00:25:40,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:40,073 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2024-09-13 00:25:40,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:25:40,074 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 123 [2024-09-13 00:25:40,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:40,076 INFO L225 Difference]: With dead ends: 253 [2024-09-13 00:25:40,076 INFO L226 Difference]: Without dead ends: 251 [2024-09-13 00:25:40,076 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2024-09-13 00:25:40,077 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 44 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:40,077 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 429 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 00:25:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-13 00:25:40,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 228. [2024-09-13 00:25:40,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 121 states have internal predecessors, (138), 91 states have call successors, (91), 18 states have call predecessors, (91), 17 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-13 00:25:40,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 317 transitions. [2024-09-13 00:25:40,188 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 317 transitions. Word has length 123 [2024-09-13 00:25:40,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:40,189 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 317 transitions. [2024-09-13 00:25:40,189 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-13 00:25:40,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 317 transitions. [2024-09-13 00:25:40,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-13 00:25:40,190 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:40,191 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:40,208 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 00:25:40,394 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 00:25:40,395 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:40,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:40,395 INFO L85 PathProgramCache]: Analyzing trace with hash 669612110, now seen corresponding path program 4 times [2024-09-13 00:25:40,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:40,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903297920] [2024-09-13 00:25:40,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:40,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:25:40,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197324135] [2024-09-13 00:25:40,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:25:40,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:40,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:40,419 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) [2024-09-13 00:25:40,421 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 00:25:40,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:25:40,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:25:40,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-13 00:25:40,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 71 proven. 36 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2024-09-13 00:25:41,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:42,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:42,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903297920] [2024-09-13 00:25:42,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:25:42,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197324135] [2024-09-13 00:25:42,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197324135] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:25:42,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:25:42,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-13 00:25:42,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829859246] [2024-09-13 00:25:42,548 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:25:42,548 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 00:25:42,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:42,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 00:25:42,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2024-09-13 00:25:42,549 INFO L87 Difference]: Start difference. First operand 228 states and 317 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-13 00:25:43,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:43,798 INFO L93 Difference]: Finished difference Result 261 states and 362 transitions. [2024-09-13 00:25:43,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 00:25:43,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 128 [2024-09-13 00:25:43,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:43,801 INFO L225 Difference]: With dead ends: 261 [2024-09-13 00:25:43,801 INFO L226 Difference]: Without dead ends: 259 [2024-09-13 00:25:43,802 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:25:43,802 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 24 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:43,803 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 528 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-13 00:25:43,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-09-13 00:25:43,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2024-09-13 00:25:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 123 states have (on average 1.1544715447154472) internal successors, (142), 126 states have internal predecessors, (142), 94 states have call successors, (94), 18 states have call predecessors, (94), 17 states have return successors, (91), 90 states have call predecessors, (91), 91 states have call successors, (91) [2024-09-13 00:25:43,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 327 transitions. [2024-09-13 00:25:43,929 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 327 transitions. Word has length 128 [2024-09-13 00:25:43,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:43,929 INFO L474 AbstractCegarLoop]: Abstraction has 235 states and 327 transitions. [2024-09-13 00:25:43,930 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-13 00:25:43,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:43,930 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 327 transitions. [2024-09-13 00:25:43,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-13 00:25:43,932 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:43,932 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:43,950 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-13 00:25:44,132 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 00:25:44,133 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:44,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1717758444, now seen corresponding path program 5 times [2024-09-13 00:25:44,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:44,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512309509] [2024-09-13 00:25:44,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:44,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:25:44,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796438628] [2024-09-13 00:25:44,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:25:44,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:44,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:44,155 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) [2024-09-13 00:25:44,156 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 00:25:44,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-13 00:25:44,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:25:44,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-13 00:25:44,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 71 proven. 41 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2024-09-13 00:25:45,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:45,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:45,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512309509] [2024-09-13 00:25:45,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:25:45,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796438628] [2024-09-13 00:25:45,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796438628] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:25:45,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:25:45,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-13 00:25:45,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643200195] [2024-09-13 00:25:45,497 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:25:45,497 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 00:25:45,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:45,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 00:25:45,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-09-13 00:25:45,498 INFO L87 Difference]: Start difference. First operand 235 states and 327 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-13 00:25:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:46,290 INFO L93 Difference]: Finished difference Result 269 states and 372 transitions. [2024-09-13 00:25:46,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 00:25:46,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 131 [2024-09-13 00:25:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:46,293 INFO L225 Difference]: With dead ends: 269 [2024-09-13 00:25:46,293 INFO L226 Difference]: Without dead ends: 267 [2024-09-13 00:25:46,293 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2024-09-13 00:25:46,294 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 24 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:46,294 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 557 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 00:25:46,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-13 00:25:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2024-09-13 00:25:46,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 138 states have (on average 1.1521739130434783) internal successors, (159), 141 states have internal predecessors, (159), 106 states have call successors, (106), 21 states have call predecessors, (106), 20 states have return successors, (103), 102 states have call predecessors, (103), 103 states have call successors, (103) [2024-09-13 00:25:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 368 transitions. [2024-09-13 00:25:46,448 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 368 transitions. Word has length 131 [2024-09-13 00:25:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:46,448 INFO L474 AbstractCegarLoop]: Abstraction has 265 states and 368 transitions. [2024-09-13 00:25:46,448 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-13 00:25:46,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:46,449 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 368 transitions. [2024-09-13 00:25:46,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-13 00:25:46,450 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:46,450 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:46,458 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-13 00:25:46,654 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:46,655 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:46,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:46,655 INFO L85 PathProgramCache]: Analyzing trace with hash -83573063, now seen corresponding path program 2 times [2024-09-13 00:25:46,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:46,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692359997] [2024-09-13 00:25:46,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:46,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:25:46,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448288656] [2024-09-13 00:25:46,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:25:46,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:46,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:46,684 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) [2024-09-13 00:25:46,686 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 00:25:46,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:25:46,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:25:46,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-13 00:25:46,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-13 00:25:47,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:49,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:49,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692359997] [2024-09-13 00:25:49,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:25:49,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448288656] [2024-09-13 00:25:49,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448288656] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:25:49,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:25:49,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-13 00:25:49,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396776031] [2024-09-13 00:25:49,800 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:25:49,801 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 00:25:49,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:25:49,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 00:25:49,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2024-09-13 00:25:49,802 INFO L87 Difference]: Start difference. First operand 265 states and 368 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-13 00:25:50,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:25:50,614 INFO L93 Difference]: Finished difference Result 305 states and 426 transitions. [2024-09-13 00:25:50,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 00:25:50,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 137 [2024-09-13 00:25:50,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:25:50,617 INFO L225 Difference]: With dead ends: 305 [2024-09-13 00:25:50,617 INFO L226 Difference]: Without dead ends: 298 [2024-09-13 00:25:50,618 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 00:25:50,618 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 30 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 00:25:50,618 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 592 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 00:25:50,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-09-13 00:25:50,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 278. [2024-09-13 00:25:50,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 146 states have (on average 1.1506849315068493) internal successors, (168), 149 states have internal predecessors, (168), 110 states have call successors, (110), 22 states have call predecessors, (110), 21 states have return successors, (107), 106 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-13 00:25:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 385 transitions. [2024-09-13 00:25:50,779 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 385 transitions. Word has length 137 [2024-09-13 00:25:50,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:25:50,780 INFO L474 AbstractCegarLoop]: Abstraction has 278 states and 385 transitions. [2024-09-13 00:25:50,780 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-13 00:25:50,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 385 transitions. [2024-09-13 00:25:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-09-13 00:25:50,781 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:25:50,781 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:25:50,798 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-13 00:25:50,982 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:50,982 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:25:50,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:25:50,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1268175597, now seen corresponding path program 6 times [2024-09-13 00:25:50,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:25:50,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568202186] [2024-09-13 00:25:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:25:50,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:25:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:25:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:25:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:25:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:25:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:25:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:25:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:25:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:25:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:25:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:25:51,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:25:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-13 00:25:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-13 00:25:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-13 00:25:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-13 00:25:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-13 00:25:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-13 00:25:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-13 00:25:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-13 00:25:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-13 00:25:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-13 00:25:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-13 00:25:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-09-13 00:25:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-13 00:25:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-09-13 00:25:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2024-09-13 00:25:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:25:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 58 proven. 53 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2024-09-13 00:25:51,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:25:51,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568202186] [2024-09-13 00:25:51,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568202186] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:25:51,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781840418] [2024-09-13 00:25:51,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:25:51,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:25:51,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:25:51,391 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) [2024-09-13 00:25:51,393 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-13 00:25:51,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 00:25:51,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:25:51,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-13 00:25:51,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:52,833 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 162 proven. 42 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2024-09-13 00:25:52,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:26:25,222 WARN L293 SmtUtils]: Spent 6.59s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:26:29,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781840418] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:26:29,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:26:29,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 24 [2024-09-13 00:26:29,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298652059] [2024-09-13 00:26:29,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:26:29,742 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 00:26:29,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:29,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 00:26:29,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 00:26:29,744 INFO L87 Difference]: Start difference. First operand 278 states and 385 transitions. Second operand has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 14 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (43), 14 states have call predecessors, (43), 13 states have call successors, (43) [2024-09-13 00:26:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:40,448 INFO L93 Difference]: Finished difference Result 401 states and 565 transitions. [2024-09-13 00:26:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-13 00:26:40,449 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 14 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (43), 14 states have call predecessors, (43), 13 states have call successors, (43) Word has length 150 [2024-09-13 00:26:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:40,452 INFO L225 Difference]: With dead ends: 401 [2024-09-13 00:26:40,452 INFO L226 Difference]: Without dead ends: 336 [2024-09-13 00:26:40,454 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=700, Invalid=3204, Unknown=2, NotChecked=0, Total=3906 [2024-09-13 00:26:40,454 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 88 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 1155 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-13 00:26:40,454 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 991 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1155 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-13 00:26:40,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-09-13 00:26:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 322. [2024-09-13 00:26:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 168 states have (on average 1.1547619047619047) internal successors, (194), 171 states have internal predecessors, (194), 130 states have call successors, (130), 24 states have call predecessors, (130), 23 states have return successors, (127), 126 states have call predecessors, (127), 127 states have call successors, (127) [2024-09-13 00:26:40,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 451 transitions. [2024-09-13 00:26:40,651 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 451 transitions. Word has length 150 [2024-09-13 00:26:40,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:40,651 INFO L474 AbstractCegarLoop]: Abstraction has 322 states and 451 transitions. [2024-09-13 00:26:40,652 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 14 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (43), 14 states have call predecessors, (43), 13 states have call successors, (43) [2024-09-13 00:26:40,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 451 transitions. [2024-09-13 00:26:40,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-09-13 00:26:40,653 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:40,654 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:26:40,664 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-13 00:26:40,857 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:40,858 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:40,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:40,859 INFO L85 PathProgramCache]: Analyzing trace with hash 680663563, now seen corresponding path program 7 times [2024-09-13 00:26:40,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:40,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089999532] [2024-09-13 00:26:40,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:40,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:26:40,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087840664] [2024-09-13 00:26:40,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 00:26:40,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:40,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:40,891 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) [2024-09-13 00:26:40,892 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-13 00:26:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:26:40,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-13 00:26:40,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:26:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 97 proven. 82 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2024-09-13 00:26:42,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:26:43,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:43,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089999532] [2024-09-13 00:26:43,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:26:43,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087840664] [2024-09-13 00:26:43,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087840664] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:26:43,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:26:43,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-13 00:26:43,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26444250] [2024-09-13 00:26:43,176 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:26:43,176 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:26:43,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:43,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:26:43,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-09-13 00:26:43,177 INFO L87 Difference]: Start difference. First operand 322 states and 451 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2024-09-13 00:26:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:26:44,792 INFO L93 Difference]: Finished difference Result 354 states and 495 transitions. [2024-09-13 00:26:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 00:26:44,793 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) Word has length 153 [2024-09-13 00:26:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:26:44,795 INFO L225 Difference]: With dead ends: 354 [2024-09-13 00:26:44,796 INFO L226 Difference]: Without dead ends: 352 [2024-09-13 00:26:44,796 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2024-09-13 00:26:44,797 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 48 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:26:44,797 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 665 Invalid, 975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 00:26:44,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-09-13 00:26:45,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 319. [2024-09-13 00:26:45,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 165 states have (on average 1.1575757575757575) internal successors, (191), 168 states have internal predecessors, (191), 130 states have call successors, (130), 24 states have call predecessors, (130), 23 states have return successors, (127), 126 states have call predecessors, (127), 127 states have call successors, (127) [2024-09-13 00:26:45,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 448 transitions. [2024-09-13 00:26:45,050 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 448 transitions. Word has length 153 [2024-09-13 00:26:45,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:26:45,051 INFO L474 AbstractCegarLoop]: Abstraction has 319 states and 448 transitions. [2024-09-13 00:26:45,051 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2024-09-13 00:26:45,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:45,051 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 448 transitions. [2024-09-13 00:26:45,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-09-13 00:26:45,052 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:26:45,053 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:26:45,071 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-13 00:26:45,256 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-13 00:26:45,257 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:26:45,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:26:45,257 INFO L85 PathProgramCache]: Analyzing trace with hash 818386669, now seen corresponding path program 8 times [2024-09-13 00:26:45,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:26:45,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108270054] [2024-09-13 00:26:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:26:45,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:26:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:26:45,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204279735] [2024-09-13 00:26:45,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:26:45,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:26:45,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:26:45,288 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) [2024-09-13 00:26:45,289 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-13 00:26:45,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:26:45,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:26:45,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-13 00:26:45,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:27:48,839 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:27:56,848 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 15 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:28:04,856 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:28:12,271 WARN L293 SmtUtils]: Spent 7.41s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:28:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 178 proven. 103 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2024-09-13 00:28:25,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:28:32,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:28:32,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108270054] [2024-09-13 00:28:32,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:28:32,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204279735] [2024-09-13 00:28:32,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204279735] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:28:32,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:28:32,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 00:28:32,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068262785] [2024-09-13 00:28:32,565 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:28:32,566 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 00:28:32,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:28:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 00:28:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=514, Unknown=1, NotChecked=0, Total=600 [2024-09-13 00:28:32,567 INFO L87 Difference]: Start difference. First operand 319 states and 448 transitions. Second operand has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-13 00:28:43,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:28:48,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:28:52,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:28:57,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:29:04,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:29:08,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:29:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:29:10,514 INFO L93 Difference]: Finished difference Result 387 states and 554 transitions. [2024-09-13 00:29:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 00:29:10,515 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 8 states have call successors, (26) Word has length 153 [2024-09-13 00:29:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:29:10,517 INFO L225 Difference]: With dead ends: 387 [2024-09-13 00:29:10,517 INFO L226 Difference]: Without dead ends: 385 [2024-09-13 00:29:10,518 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 152 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=162, Invalid=1027, Unknown=1, NotChecked=0, Total=1190 [2024-09-13 00:29:10,518 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 29 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 20 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:29:10,519 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 748 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 745 Invalid, 5 Unknown, 0 Unchecked, 32.0s Time] [2024-09-13 00:29:10,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-13 00:29:10,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 368. [2024-09-13 00:29:10,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 189 states have internal predecessors, (218), 155 states have call successors, (155), 26 states have call predecessors, (155), 25 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2024-09-13 00:29:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 525 transitions. [2024-09-13 00:29:10,753 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 525 transitions. Word has length 153 [2024-09-13 00:29:10,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:29:10,753 INFO L474 AbstractCegarLoop]: Abstraction has 368 states and 525 transitions. [2024-09-13 00:29:10,753 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 11 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-13 00:29:10,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:10,754 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 525 transitions. [2024-09-13 00:29:10,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-09-13 00:29:10,755 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:29:10,755 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:29:10,771 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-13 00:29:10,955 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-13 00:29:10,956 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:29:10,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:10,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1362351366, now seen corresponding path program 3 times [2024-09-13 00:29:10,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:29:10,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497015757] [2024-09-13 00:29:10,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:29:10,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:29:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:29:10,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [193971281] [2024-09-13 00:29:10,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:29:10,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:29:10,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:29:10,977 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) [2024-09-13 00:29:10,980 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-13 00:29:11,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 00:29:11,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:29:11,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 00:29:11,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:29:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 95 proven. 43 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2024-09-13 00:29:11,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:29:16,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:29:16,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497015757] [2024-09-13 00:29:16,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:29:16,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193971281] [2024-09-13 00:29:16,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193971281] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:29:16,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:29:16,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-13 00:29:16,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823090409] [2024-09-13 00:29:16,547 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:29:16,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 00:29:16,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:29:16,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 00:29:16,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2024-09-13 00:29:16,548 INFO L87 Difference]: Start difference. First operand 368 states and 525 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-13 00:29:17,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:29:17,083 INFO L93 Difference]: Finished difference Result 384 states and 538 transitions. [2024-09-13 00:29:17,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 00:29:17,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 156 [2024-09-13 00:29:17,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:29:17,086 INFO L225 Difference]: With dead ends: 384 [2024-09-13 00:29:17,086 INFO L226 Difference]: Without dead ends: 377 [2024-09-13 00:29:17,087 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-09-13 00:29:17,087 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 00:29:17,087 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 287 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 00:29:17,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2024-09-13 00:29:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 376. [2024-09-13 00:29:17,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 193 states have (on average 1.1554404145077721) internal successors, (223), 195 states have internal predecessors, (223), 155 states have call successors, (155), 28 states have call predecessors, (155), 27 states have return successors, (152), 152 states have call predecessors, (152), 152 states have call successors, (152) [2024-09-13 00:29:17,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 530 transitions. [2024-09-13 00:29:17,388 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 530 transitions. Word has length 156 [2024-09-13 00:29:17,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:29:17,389 INFO L474 AbstractCegarLoop]: Abstraction has 376 states and 530 transitions. [2024-09-13 00:29:17,389 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-13 00:29:17,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:17,389 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 530 transitions. [2024-09-13 00:29:17,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-13 00:29:17,390 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:29:17,390 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:29:17,402 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-13 00:29:17,590 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:29:17,591 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:29:17,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:17,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1326373992, now seen corresponding path program 4 times [2024-09-13 00:29:17,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:29:17,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698951534] [2024-09-13 00:29:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:29:17,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:29:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:29:17,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666115900] [2024-09-13 00:29:17,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:29:17,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:29:17,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:29:17,611 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) [2024-09-13 00:29:17,613 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-13 00:29:17,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:29:17,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:29:17,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-13 00:29:17,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:29:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 99 proven. 89 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2024-09-13 00:29:18,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:29:21,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:29:21,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698951534] [2024-09-13 00:29:21,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:29:21,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666115900] [2024-09-13 00:29:21,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666115900] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:29:21,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:29:21,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-13 00:29:21,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843440450] [2024-09-13 00:29:21,227 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:29:21,228 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:29:21,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:29:21,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:29:21,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 00:29:21,229 INFO L87 Difference]: Start difference. First operand 376 states and 530 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-13 00:29:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:29:22,470 INFO L93 Difference]: Finished difference Result 457 states and 642 transitions. [2024-09-13 00:29:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 00:29:22,471 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) Word has length 159 [2024-09-13 00:29:22,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:29:22,473 INFO L225 Difference]: With dead ends: 457 [2024-09-13 00:29:22,473 INFO L226 Difference]: Without dead ends: 387 [2024-09-13 00:29:22,474 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=274, Invalid=1366, Unknown=0, NotChecked=0, Total=1640 [2024-09-13 00:29:22,475 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 42 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 00:29:22,475 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 465 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 00:29:22,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2024-09-13 00:29:22,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 386. [2024-09-13 00:29:22,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 198 states have (on average 1.1515151515151516) internal successors, (228), 200 states have internal predecessors, (228), 159 states have call successors, (159), 29 states have call predecessors, (159), 28 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2024-09-13 00:29:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 543 transitions. [2024-09-13 00:29:22,812 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 543 transitions. Word has length 159 [2024-09-13 00:29:22,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:29:22,812 INFO L474 AbstractCegarLoop]: Abstraction has 386 states and 543 transitions. [2024-09-13 00:29:22,812 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-13 00:29:22,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 543 transitions. [2024-09-13 00:29:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-13 00:29:22,814 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:29:22,814 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:29:22,827 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-13 00:29:23,014 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-13 00:29:23,014 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:29:23,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:23,015 INFO L85 PathProgramCache]: Analyzing trace with hash 895086330, now seen corresponding path program 5 times [2024-09-13 00:29:23,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:29:23,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801327190] [2024-09-13 00:29:23,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:29:23,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:29:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:29:23,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517648059] [2024-09-13 00:29:23,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:29:23,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:29:23,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:29:23,036 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) [2024-09-13 00:29:23,038 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-13 00:29:23,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-13 00:29:23,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:29:23,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-13 00:29:23,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:29:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 81 proven. 98 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2024-09-13 00:29:25,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:29:27,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:29:27,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801327190] [2024-09-13 00:29:27,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:29:27,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517648059] [2024-09-13 00:29:27,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517648059] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:29:27,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:29:27,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-13 00:29:27,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932743073] [2024-09-13 00:29:27,263 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:29:27,264 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 00:29:27,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:29:27,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 00:29:27,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2024-09-13 00:29:27,265 INFO L87 Difference]: Start difference. First operand 386 states and 543 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-13 00:29:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:29:31,681 INFO L93 Difference]: Finished difference Result 455 states and 644 transitions. [2024-09-13 00:29:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 00:29:31,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 159 [2024-09-13 00:29:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:29:31,685 INFO L225 Difference]: With dead ends: 455 [2024-09-13 00:29:31,685 INFO L226 Difference]: Without dead ends: 453 [2024-09-13 00:29:31,686 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 00:29:31,686 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 41 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:29:31,687 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 683 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-13 00:29:31,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2024-09-13 00:29:32,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 418. [2024-09-13 00:29:32,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 217 states have (on average 1.152073732718894) internal successors, (250), 220 states have internal predecessors, (250), 168 states have call successors, (168), 33 states have call predecessors, (168), 32 states have return successors, (165), 164 states have call predecessors, (165), 165 states have call successors, (165) [2024-09-13 00:29:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 583 transitions. [2024-09-13 00:29:32,051 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 583 transitions. Word has length 159 [2024-09-13 00:29:32,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:29:32,051 INFO L474 AbstractCegarLoop]: Abstraction has 418 states and 583 transitions. [2024-09-13 00:29:32,052 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-13 00:29:32,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:32,052 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 583 transitions. [2024-09-13 00:29:32,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-13 00:29:32,053 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:29:32,054 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:29:32,068 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-13 00:29:32,257 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-13 00:29:32,257 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:29:32,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:32,258 INFO L85 PathProgramCache]: Analyzing trace with hash 487350504, now seen corresponding path program 2 times [2024-09-13 00:29:32,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:29:32,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605032271] [2024-09-13 00:29:32,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:29:32,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:29:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:29:32,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190268126] [2024-09-13 00:29:32,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:29:32,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:29:32,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:29:32,293 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:29:32,298 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-13 00:29:32,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:29:32,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:29:32,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-13 00:29:32,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:29:33,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 104 proven. 80 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2024-09-13 00:29:33,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:29:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 108 proven. 7 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2024-09-13 00:29:33,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:29:33,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605032271] [2024-09-13 00:29:33,329 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:29:33,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190268126] [2024-09-13 00:29:33,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190268126] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:29:33,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:29:33,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2024-09-13 00:29:33,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840357345] [2024-09-13 00:29:33,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:29:33,330 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 00:29:33,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:29:33,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 00:29:33,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:29:33,331 INFO L87 Difference]: Start difference. First operand 418 states and 583 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) [2024-09-13 00:29:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:29:36,141 INFO L93 Difference]: Finished difference Result 473 states and 658 transitions. [2024-09-13 00:29:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 00:29:36,142 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) Word has length 164 [2024-09-13 00:29:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:29:36,145 INFO L225 Difference]: With dead ends: 473 [2024-09-13 00:29:36,145 INFO L226 Difference]: Without dead ends: 460 [2024-09-13 00:29:36,146 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 00:29:36,146 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 58 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-13 00:29:36,146 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 624 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-13 00:29:36,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2024-09-13 00:29:36,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 426. [2024-09-13 00:29:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 224 states have (on average 1.1428571428571428) internal successors, (256), 226 states have internal predecessors, (256), 167 states have call successors, (167), 35 states have call predecessors, (167), 34 states have return successors, (165), 164 states have call predecessors, (165), 165 states have call successors, (165) [2024-09-13 00:29:36,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 588 transitions. [2024-09-13 00:29:36,537 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 588 transitions. Word has length 164 [2024-09-13 00:29:36,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:29:36,538 INFO L474 AbstractCegarLoop]: Abstraction has 426 states and 588 transitions. [2024-09-13 00:29:36,538 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) [2024-09-13 00:29:36,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:36,538 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 588 transitions. [2024-09-13 00:29:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-09-13 00:29:36,540 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:29:36,540 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:29:36,557 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-13 00:29:36,744 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-13 00:29:36,745 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:29:36,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:29:36,745 INFO L85 PathProgramCache]: Analyzing trace with hash 515416140, now seen corresponding path program 9 times [2024-09-13 00:29:36,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:29:36,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372529494] [2024-09-13 00:29:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:29:36,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:29:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:29:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:29:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:29:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:29:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:29:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:29:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:29:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:29:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:29:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:29:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:29:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-13 00:29:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-13 00:29:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-13 00:29:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-13 00:29:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-13 00:29:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-13 00:29:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-13 00:29:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-13 00:29:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-13 00:29:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2024-09-13 00:29:37,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-13 00:29:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2024-09-13 00:29:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-13 00:29:37,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-09-13 00:29:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2024-09-13 00:29:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2024-09-13 00:29:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2024-09-13 00:29:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2024-09-13 00:29:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2024-09-13 00:29:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:29:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 71 proven. 76 refuted. 0 times theorem prover too weak. 1063 trivial. 0 not checked. [2024-09-13 00:29:37,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:29:37,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372529494] [2024-09-13 00:29:37,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372529494] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:29:37,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041158741] [2024-09-13 00:29:37,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:29:37,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:29:37,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:29:37,152 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:29:37,154 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-13 00:29:37,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 00:29:37,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:29:37,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-13 00:29:37,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:29:40,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 238 proven. 92 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2024-09-13 00:29:40,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:29:45,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041158741] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:29:45,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:29:45,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 29 [2024-09-13 00:29:45,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906246884] [2024-09-13 00:29:45,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:29:45,497 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-13 00:29:45,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:29:45,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-13 00:29:45,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 00:29:45,498 INFO L87 Difference]: Start difference. First operand 426 states and 588 transitions. Second operand has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 16 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) [2024-09-13 00:29:50,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:30:01,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:30:08,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:30:13,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:30:16,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:30:23,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:30:25,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:30:29,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.87s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:30:34,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:30:36,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:30:44,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:30:48,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:30:55,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:31:01,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:31:01,948 INFO L93 Difference]: Finished difference Result 651 states and 923 transitions. [2024-09-13 00:31:01,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-13 00:31:01,949 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 16 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) Word has length 175 [2024-09-13 00:31:01,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:31:01,952 INFO L225 Difference]: With dead ends: 651 [2024-09-13 00:31:01,952 INFO L226 Difference]: Without dead ends: 575 [2024-09-13 00:31:01,954 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=1123, Invalid=6358, Unknown=1, NotChecked=0, Total=7482 [2024-09-13 00:31:01,954 INFO L434 NwaCegarLoop]: 113 mSDtfsCounter, 149 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 200 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 2463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60.5s IncrementalHoareTripleChecker+Time [2024-09-13 00:31:01,955 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1903 Invalid, 2463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2257 Invalid, 6 Unknown, 0 Unchecked, 60.5s Time] [2024-09-13 00:31:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-09-13 00:31:02,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 498. [2024-09-13 00:31:02,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 264 states have (on average 1.1363636363636365) internal successors, (300), 265 states have internal predecessors, (300), 193 states have call successors, (193), 41 states have call predecessors, (193), 40 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2024-09-13 00:31:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 684 transitions. [2024-09-13 00:31:02,447 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 684 transitions. Word has length 175 [2024-09-13 00:31:02,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:31:02,448 INFO L474 AbstractCegarLoop]: Abstraction has 498 states and 684 transitions. [2024-09-13 00:31:02,448 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 16 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (47), 15 states have call predecessors, (47), 15 states have call successors, (47) [2024-09-13 00:31:02,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:31:02,448 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 684 transitions. [2024-09-13 00:31:02,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-09-13 00:31:02,450 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:31:02,450 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:31:02,469 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-13 00:31:02,651 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-13 00:31:02,651 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:31:02,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:31:02,652 INFO L85 PathProgramCache]: Analyzing trace with hash -942115888, now seen corresponding path program 10 times [2024-09-13 00:31:02,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:31:02,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876753889] [2024-09-13 00:31:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:31:02,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:31:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:31:02,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123563267] [2024-09-13 00:31:02,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:31:02,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:31:02,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:31:02,695 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:31:02,696 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-13 00:31:02,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:31:02,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:31:02,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-13 00:31:02,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:31:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 190 proven. 151 refuted. 0 times theorem prover too weak. 877 trivial. 0 not checked. [2024-09-13 00:31:34,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:31:35,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:31:35,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876753889] [2024-09-13 00:31:35,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:31:35,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123563267] [2024-09-13 00:31:35,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123563267] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:31:35,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:31:35,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-13 00:31:35,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40175762] [2024-09-13 00:31:35,608 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:31:35,608 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 00:31:35,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:31:35,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 00:31:35,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=561, Unknown=2, NotChecked=0, Total=650 [2024-09-13 00:31:35,609 INFO L87 Difference]: Start difference. First operand 498 states and 684 transitions. Second operand has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 19 states have internal predecessors, (41), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 12 states have call predecessors, (30), 11 states have call successors, (30) [2024-09-13 00:31:39,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:31:43,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:31:50,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:31:53,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:32:01,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:32:12,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:32:16,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:32:20,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:32:24,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:32:26,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:32:31,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:32:35,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:32:37,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:32:39,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:32:43,393 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:32:53,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:32:55,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:00,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.78s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:14,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:31,618 WARN L293 SmtUtils]: Spent 7.14s on a formula simplification. DAG size of input: 60 DAG size of output: 63 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:33:36,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:41,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:40,489 WARN L293 SmtUtils]: Spent 49.90s on a formula simplification. DAG size of input: 66 DAG size of output: 68 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:34:43,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:49,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:54,325 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:34:55,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:34:55,139 INFO L93 Difference]: Finished difference Result 559 states and 776 transitions. [2024-09-13 00:34:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 00:34:55,140 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 19 states have internal predecessors, (41), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 12 states have call predecessors, (30), 11 states have call successors, (30) Word has length 178 [2024-09-13 00:34:55,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:34:55,142 INFO L225 Difference]: With dead ends: 559 [2024-09-13 00:34:55,142 INFO L226 Difference]: Without dead ends: 557 [2024-09-13 00:34:55,143 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 124.3s TimeCoverageRelationStatistics Valid=179, Invalid=1294, Unknown=9, NotChecked=0, Total=1482 [2024-09-13 00:34:55,143 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 40 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 28 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 99.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.9s IncrementalHoareTripleChecker+Time [2024-09-13 00:34:55,143 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 487 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 965 Invalid, 16 Unknown, 0 Unchecked, 99.9s Time] [2024-09-13 00:34:55,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2024-09-13 00:34:55,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 554. [2024-09-13 00:34:55,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 290 states have (on average 1.1413793103448275) internal successors, (331), 291 states have internal predecessors, (331), 221 states have call successors, (221), 43 states have call predecessors, (221), 42 states have return successors, (219), 219 states have call predecessors, (219), 219 states have call successors, (219) [2024-09-13 00:34:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 771 transitions. [2024-09-13 00:34:55,670 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 771 transitions. Word has length 178 [2024-09-13 00:34:55,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:34:55,671 INFO L474 AbstractCegarLoop]: Abstraction has 554 states and 771 transitions. [2024-09-13 00:34:55,671 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 19 states have internal predecessors, (41), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 12 states have call predecessors, (30), 11 states have call successors, (30) [2024-09-13 00:34:55,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:55,671 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 771 transitions. [2024-09-13 00:34:55,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-09-13 00:34:55,673 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:34:55,673 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:34:55,691 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-13 00:34:55,874 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:34:55,874 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:34:55,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:55,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1646591799, now seen corresponding path program 6 times [2024-09-13 00:34:55,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:34:55,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594684683] [2024-09-13 00:34:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:34:55,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:34:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:34:55,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006293809] [2024-09-13 00:34:55,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:34:55,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:34:55,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:34:55,899 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:34:55,900 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-13 00:34:56,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-13 00:34:56,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:34:56,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 00:34:56,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:35:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 127 proven. 132 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2024-09-13 00:35:12,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:35:21,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:35:21,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594684683] [2024-09-13 00:35:21,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:35:21,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006293809] [2024-09-13 00:35:21,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006293809] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:35:21,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:35:21,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:35:21,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909580693] [2024-09-13 00:35:21,947 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:35:21,948 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:35:21,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:35:21,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:35:21,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=508, Unknown=2, NotChecked=0, Total=600 [2024-09-13 00:35:21,948 INFO L87 Difference]: Start difference. First operand 554 states and 771 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-13 00:35:25,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:35:28,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:35:34,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:35:37,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:35:40,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:35:50,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:35:54,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:35:55,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:35:59,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:02,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:06,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:10,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:18,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:20,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:24,267 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:26,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:29,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:33,675 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:38,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:43,218 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:47,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:51,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:56,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:00,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:04,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:09,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:09,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:37:09,628 INFO L93 Difference]: Finished difference Result 580 states and 792 transitions. [2024-09-13 00:37:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:37:09,628 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 181 [2024-09-13 00:37:09,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:37:09,631 INFO L225 Difference]: With dead ends: 580 [2024-09-13 00:37:09,631 INFO L226 Difference]: Without dead ends: 573 [2024-09-13 00:37:09,632 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=133, Invalid=735, Unknown=2, NotChecked=0, Total=870 [2024-09-13 00:37:09,633 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 18 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:37:09,633 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 592 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 512 Invalid, 17 Unknown, 0 Unchecked, 98.4s Time] [2024-09-13 00:37:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2024-09-13 00:37:10,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 570. [2024-09-13 00:37:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 302 states have (on average 1.1324503311258278) internal successors, (342), 303 states have internal predecessors, (342), 221 states have call successors, (221), 47 states have call predecessors, (221), 46 states have return successors, (219), 219 states have call predecessors, (219), 219 states have call successors, (219) [2024-09-13 00:37:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 782 transitions. [2024-09-13 00:37:10,154 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 782 transitions. Word has length 181 [2024-09-13 00:37:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:37:10,154 INFO L474 AbstractCegarLoop]: Abstraction has 570 states and 782 transitions. [2024-09-13 00:37:10,155 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-13 00:37:10,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:37:10,155 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 782 transitions. [2024-09-13 00:37:10,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-09-13 00:37:10,156 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:37:10,156 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:37:10,173 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-13 00:37:10,357 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-13 00:37:10,357 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:37:10,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:37:10,357 INFO L85 PathProgramCache]: Analyzing trace with hash -468699879, now seen corresponding path program 7 times [2024-09-13 00:37:10,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:37:10,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99410163] [2024-09-13 00:37:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:37:10,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:37:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:37:10,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169481095] [2024-09-13 00:37:10,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 00:37:10,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:37:10,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:37:10,395 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:37:10,396 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-13 00:37:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:37:10,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 00:37:10,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:37:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 119 proven. 110 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2024-09-13 00:37:17,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:37:22,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:37:22,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99410163] [2024-09-13 00:37:22,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:37:22,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169481095] [2024-09-13 00:37:22,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169481095] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:37:22,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:37:22,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-13 00:37:22,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108724909] [2024-09-13 00:37:22,260 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:37:22,260 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:37:22,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:37:22,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:37:22,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2024-09-13 00:37:22,261 INFO L87 Difference]: Start difference. First operand 570 states and 782 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-13 00:37:31,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:37:31,483 INFO L93 Difference]: Finished difference Result 591 states and 806 transitions. [2024-09-13 00:37:31,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 00:37:31,484 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) Word has length 181 [2024-09-13 00:37:31,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:37:31,488 INFO L225 Difference]: With dead ends: 591 [2024-09-13 00:37:31,488 INFO L226 Difference]: Without dead ends: 581 [2024-09-13 00:37:31,489 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=146, Invalid=1186, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 00:37:31,489 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 41 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-09-13 00:37:31,490 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 501 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-09-13 00:37:31,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2024-09-13 00:37:32,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 580. [2024-09-13 00:37:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 307 states have (on average 1.1302931596091206) internal successors, (347), 308 states have internal predecessors, (347), 225 states have call successors, (225), 48 states have call predecessors, (225), 47 states have return successors, (223), 223 states have call predecessors, (223), 223 states have call successors, (223) [2024-09-13 00:37:32,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 795 transitions. [2024-09-13 00:37:32,054 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 795 transitions. Word has length 181 [2024-09-13 00:37:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:37:32,055 INFO L474 AbstractCegarLoop]: Abstraction has 580 states and 795 transitions. [2024-09-13 00:37:32,055 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-13 00:37:32,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:37:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 795 transitions. [2024-09-13 00:37:32,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-09-13 00:37:32,062 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:37:32,062 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:37:32,080 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-13 00:37:32,263 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:37:32,263 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:37:32,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:37:32,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1752760443, now seen corresponding path program 8 times [2024-09-13 00:37:32,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:37:32,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531277902] [2024-09-13 00:37:32,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:37:32,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:37:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:37:32,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014061694] [2024-09-13 00:37:32,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:37:32,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:37:32,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:37:32,287 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:37:32,291 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-13 00:37:32,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:37:32,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:37:32,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-13 00:37:32,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:37:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 113 proven. 116 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2024-09-13 00:37:41,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:37:48,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:37:48,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531277902] [2024-09-13 00:37:48,658 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:37:48,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014061694] [2024-09-13 00:37:48,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014061694] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:37:48,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:37:48,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-13 00:37:48,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770861093] [2024-09-13 00:37:48,659 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:37:48,659 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-13 00:37:48,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:37:48,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-13 00:37:48,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=614, Unknown=1, NotChecked=0, Total=702 [2024-09-13 00:37:48,660 INFO L87 Difference]: Start difference. First operand 580 states and 795 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-13 00:37:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:37:58,963 INFO L93 Difference]: Finished difference Result 709 states and 968 transitions. [2024-09-13 00:37:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 00:37:58,964 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) Word has length 181 [2024-09-13 00:37:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:37:58,967 INFO L225 Difference]: With dead ends: 709 [2024-09-13 00:37:58,967 INFO L226 Difference]: Without dead ends: 580 [2024-09-13 00:37:58,968 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 167 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=169, Invalid=1236, Unknown=1, NotChecked=0, Total=1406 [2024-09-13 00:37:58,968 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 40 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2024-09-13 00:37:58,968 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 597 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2024-09-13 00:37:58,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2024-09-13 00:37:59,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 579. [2024-09-13 00:37:59,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 308 states have (on average 1.1233766233766234) internal successors, (346), 309 states have internal predecessors, (346), 221 states have call successors, (221), 50 states have call predecessors, (221), 49 states have return successors, (219), 219 states have call predecessors, (219), 219 states have call successors, (219) [2024-09-13 00:37:59,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 786 transitions. [2024-09-13 00:37:59,450 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 786 transitions. Word has length 181 [2024-09-13 00:37:59,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:37:59,450 INFO L474 AbstractCegarLoop]: Abstraction has 579 states and 786 transitions. [2024-09-13 00:37:59,451 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-13 00:37:59,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:37:59,451 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 786 transitions. [2024-09-13 00:37:59,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-09-13 00:37:59,453 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:37:59,453 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:37:59,471 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-13 00:37:59,654 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:37:59,654 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:37:59,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:37:59,654 INFO L85 PathProgramCache]: Analyzing trace with hash 58480029, now seen corresponding path program 9 times [2024-09-13 00:37:59,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:37:59,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152127743] [2024-09-13 00:37:59,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:37:59,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:37:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:37:59,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182102071] [2024-09-13 00:37:59,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:37:59,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:37:59,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:37:59,683 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:37:59,684 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-13 00:37:59,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-13 00:37:59,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:37:59,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-09-13 00:37:59,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:38:09,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 162 proven. 195 refuted. 0 times theorem prover too weak. 960 trivial. 0 not checked. [2024-09-13 00:38:09,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:38:15,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 201 proven. 68 refuted. 0 times theorem prover too weak. 1048 trivial. 0 not checked. [2024-09-13 00:38:15,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:38:15,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152127743] [2024-09-13 00:38:15,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:38:15,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182102071] [2024-09-13 00:38:15,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182102071] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:38:15,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:38:15,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 33 [2024-09-13 00:38:15,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344187469] [2024-09-13 00:38:15,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:38:15,453 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-13 00:38:15,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:38:15,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-13 00:38:15,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 00:38:15,455 INFO L87 Difference]: Start difference. First operand 579 states and 786 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 29 states have internal predecessors, (64), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 15 states have call predecessors, (52), 13 states have call successors, (52) [2024-09-13 00:38:40,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:38:40,734 INFO L93 Difference]: Finished difference Result 700 states and 957 transitions. [2024-09-13 00:38:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-13 00:38:40,735 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 29 states have internal predecessors, (64), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 15 states have call predecessors, (52), 13 states have call successors, (52) Word has length 184 [2024-09-13 00:38:40,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:38:40,739 INFO L225 Difference]: With dead ends: 700 [2024-09-13 00:38:40,739 INFO L226 Difference]: Without dead ends: 679 [2024-09-13 00:38:40,741 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 334 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=755, Invalid=3535, Unknown=0, NotChecked=0, Total=4290 [2024-09-13 00:38:40,741 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 130 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:38:40,741 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 905 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2024-09-13 00:38:40,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2024-09-13 00:38:41,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 667. [2024-09-13 00:38:41,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 349 states have (on average 1.1146131805157593) internal successors, (389), 350 states have internal predecessors, (389), 261 states have call successors, (261), 57 states have call predecessors, (261), 56 states have return successors, (259), 259 states have call predecessors, (259), 259 states have call successors, (259) [2024-09-13 00:38:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 909 transitions. [2024-09-13 00:38:41,489 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 909 transitions. Word has length 184 [2024-09-13 00:38:41,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:38:41,489 INFO L474 AbstractCegarLoop]: Abstraction has 667 states and 909 transitions. [2024-09-13 00:38:41,490 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 29 states have internal predecessors, (64), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 15 states have call predecessors, (52), 13 states have call successors, (52) [2024-09-13 00:38:41,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:38:41,490 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 909 transitions. [2024-09-13 00:38:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-09-13 00:38:41,492 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:38:41,492 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:38:41,500 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-13 00:38:41,696 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-09-13 00:38:41,697 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:38:41,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:38:41,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1937203439, now seen corresponding path program 11 times [2024-09-13 00:38:41,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:38:41,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904328680] [2024-09-13 00:38:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:38:41,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:38:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:42,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:38:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:42,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:38:42,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:42,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:38:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:38:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:38:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:38:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:38:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:38:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:38:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:38:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:38:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 00:38:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 00:38:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 00:38:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 00:38:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-13 00:38:43,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-13 00:38:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-13 00:38:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-13 00:38:43,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2024-09-13 00:38:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-13 00:38:43,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2024-09-13 00:38:43,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-09-13 00:38:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2024-09-13 00:38:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-13 00:38:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2024-09-13 00:38:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2024-09-13 00:38:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2024-09-13 00:38:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2024-09-13 00:38:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2024-09-13 00:38:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2024-09-13 00:38:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2024-09-13 00:38:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2024-09-13 00:38:43,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2024-09-13 00:38:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 95 proven. 103 refuted. 0 times theorem prover too weak. 1455 trivial. 0 not checked. [2024-09-13 00:38:43,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:38:43,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904328680] [2024-09-13 00:38:43,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904328680] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:38:43,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778739941] [2024-09-13 00:38:43,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:38:43,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:38:43,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:38:43,232 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:38:43,233 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-13 00:38:43,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-13 00:38:43,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:38:43,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-13 00:38:43,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:38:44,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 377 proven. 103 refuted. 0 times theorem prover too weak. 1173 trivial. 0 not checked. [2024-09-13 00:38:44,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:38:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 92 proven. 112 refuted. 0 times theorem prover too weak. 1449 trivial. 0 not checked. [2024-09-13 00:38:48,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778739941] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:38:48,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:38:48,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 15] total 25 [2024-09-13 00:38:48,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310943086] [2024-09-13 00:38:48,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:38:48,219 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 00:38:48,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:38:48,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 00:38:48,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:38:48,220 INFO L87 Difference]: Start difference. First operand 667 states and 909 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 22 states have internal predecessors, (65), 16 states have call successors, (65), 2 states have call predecessors, (65), 3 states have return successors, (65), 16 states have call predecessors, (65), 16 states have call successors, (65) [2024-09-13 00:38:54,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:38:54,961 INFO L93 Difference]: Finished difference Result 839 states and 1157 transitions. [2024-09-13 00:38:54,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-13 00:38:54,962 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 22 states have internal predecessors, (65), 16 states have call successors, (65), 2 states have call predecessors, (65), 3 states have return successors, (65), 16 states have call predecessors, (65), 16 states have call successors, (65) Word has length 200 [2024-09-13 00:38:54,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:38:54,965 INFO L225 Difference]: With dead ends: 839 [2024-09-13 00:38:54,965 INFO L226 Difference]: Without dead ends: 598 [2024-09-13 00:38:54,967 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=550, Invalid=1706, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 00:38:54,967 INFO L434 NwaCegarLoop]: 81 mSDtfsCounter, 78 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:38:54,967 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 765 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-13 00:38:54,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2024-09-13 00:38:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 488. [2024-09-13 00:38:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 269 states have (on average 1.0743494423791822) internal successors, (289), 271 states have internal predecessors, (289), 167 states have call successors, (167), 52 states have call predecessors, (167), 51 states have return successors, (165), 164 states have call predecessors, (165), 165 states have call successors, (165) [2024-09-13 00:38:55,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 621 transitions. [2024-09-13 00:38:55,493 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 621 transitions. Word has length 200 [2024-09-13 00:38:55,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:38:55,494 INFO L474 AbstractCegarLoop]: Abstraction has 488 states and 621 transitions. [2024-09-13 00:38:55,494 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 22 states have internal predecessors, (65), 16 states have call successors, (65), 2 states have call predecessors, (65), 3 states have return successors, (65), 16 states have call predecessors, (65), 16 states have call successors, (65) [2024-09-13 00:38:55,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:38:55,494 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 621 transitions. [2024-09-13 00:38:55,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-09-13 00:38:55,496 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:38:55,496 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:38:55,505 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-13 00:38:55,697 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:38:55,698 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:38:55,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:38:55,698 INFO L85 PathProgramCache]: Analyzing trace with hash 2074926545, now seen corresponding path program 12 times [2024-09-13 00:38:55,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:38:55,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315029310] [2024-09-13 00:38:55,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:38:55,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:38:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:56,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:38:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:56,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:38:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:56,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:38:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:38:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:38:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:38:57,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:38:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:38:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:38:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:38:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:38:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 00:38:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 00:38:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 00:38:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 00:38:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-13 00:38:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-13 00:38:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-13 00:38:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-13 00:38:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-13 00:38:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2024-09-13 00:38:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-13 00:38:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2024-09-13 00:38:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2024-09-13 00:38:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-13 00:38:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2024-09-13 00:38:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2024-09-13 00:38:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2024-09-13 00:38:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2024-09-13 00:38:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2024-09-13 00:38:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2024-09-13 00:38:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2024-09-13 00:38:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2024-09-13 00:38:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2024-09-13 00:38:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 95 proven. 109 refuted. 0 times theorem prover too weak. 1449 trivial. 0 not checked. [2024-09-13 00:38:57,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:38:57,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315029310] [2024-09-13 00:38:57,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315029310] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:38:57,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495036283] [2024-09-13 00:38:57,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:38:57,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:38:57,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:38:57,106 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:38:57,107 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-13 00:38:57,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 00:38:57,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:38:57,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-13 00:38:57,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:39:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 207 proven. 132 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2024-09-13 00:39:06,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:39:07,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495036283] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:39:07,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:39:07,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19] total 29 [2024-09-13 00:39:07,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795013874] [2024-09-13 00:39:07,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:39:07,521 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-13 00:39:07,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:39:07,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-13 00:39:07,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2024-09-13 00:39:07,522 INFO L87 Difference]: Start difference. First operand 488 states and 621 transitions. Second operand has 29 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 17 states have call successors, (60), 3 states have call predecessors, (60), 3 states have return successors, (58), 18 states have call predecessors, (58), 16 states have call successors, (58) Killed by 15