./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/sum_10x0-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/sum_10x0-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 68d0cd7d514b491e1404560081afc21267eb1b3dae98cdb9832a8634357d65e4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:26:24,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:26:24,654 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:26:24,660 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:26:24,660 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:26:24,699 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:26:24,700 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:26:24,701 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:26:24,703 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:26:24,708 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:26:24,710 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:26:24,710 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:26:24,711 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:26:24,713 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:26:24,713 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:26:24,713 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:26:24,714 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:26:24,714 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:26:24,715 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:26:24,715 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:26:24,716 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:26:24,716 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:26:24,717 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:26:24,717 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:26:24,717 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:26:24,718 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:26:24,719 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:26:24,719 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:26:24,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:26:24,720 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:26:24,721 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:26:24,722 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:26:24,722 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:26:24,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:26:24,723 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:26:24,723 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:26:24,723 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:26:24,723 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:26:24,724 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:26:24,724 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68d0cd7d514b491e1404560081afc21267eb1b3dae98cdb9832a8634357d65e4 [2023-11-06 22:26:25,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:26:25,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:26:25,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:26:25,100 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:26:25,101 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:26:25,102 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/recursive-simple/sum_10x0-1.c [2023-11-06 22:26:28,211 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:26:28,416 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:26:28,416 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/sv-benchmarks/c/recursive-simple/sum_10x0-1.c [2023-11-06 22:26:28,425 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/data/1b0f24e8f/ded157678d514a7aafce3774e3a4be4d/FLAGa40b9885c [2023-11-06 22:26:28,445 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/data/1b0f24e8f/ded157678d514a7aafce3774e3a4be4d [2023-11-06 22:26:28,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:26:28,459 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:26:28,466 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:26:28,466 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:26:28,472 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:26:28,473 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23316750 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28, skipping insertion in model container [2023-11-06 22:26:28,474 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,496 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:26:28,697 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/sv-benchmarks/c/recursive-simple/sum_10x0-1.c[481,494] [2023-11-06 22:26:28,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:26:28,713 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:26:28,729 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/sv-benchmarks/c/recursive-simple/sum_10x0-1.c[481,494] [2023-11-06 22:26:28,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:26:28,745 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:26:28,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28 WrapperNode [2023-11-06 22:26:28,746 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:26:28,747 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:26:28,747 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:26:28,748 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:26:28,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,764 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,781 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2023-11-06 22:26:28,782 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:26:28,783 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:26:28,783 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:26:28,783 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:26:28,793 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,795 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,795 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,798 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,799 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,800 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,801 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,803 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:26:28,804 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:26:28,804 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:26:28,804 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:26:28,805 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28" (1/1) ... [2023-11-06 22:26:28,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:26:28,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:28,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:26:28,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:26:28,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:26:28,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:26:28,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:26:28,888 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2023-11-06 22:26:28,888 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2023-11-06 22:26:28,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:26:28,965 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:26:28,967 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:26:29,135 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:26:29,146 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:26:29,150 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 22:26:29,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:29 BoogieIcfgContainer [2023-11-06 22:26:29,153 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:26:29,157 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:26:29,158 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:26:29,162 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:26:29,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:26:28" (1/3) ... [2023-11-06 22:26:29,163 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b037ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:29, skipping insertion in model container [2023-11-06 22:26:29,164 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:26:28" (2/3) ... [2023-11-06 22:26:29,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b037ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:26:29, skipping insertion in model container [2023-11-06 22:26:29,166 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:29" (3/3) ... [2023-11-06 22:26:29,167 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_10x0-1.c [2023-11-06 22:26:29,188 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:26:29,189 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:26:29,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:26:29,265 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@477687de, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:26:29,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:26:29,272 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 22:26:29,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 22:26:29,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:29,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:29,285 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:29,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:29,294 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2023-11-06 22:26:29,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:29,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674359465] [2023-11-06 22:26:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:29,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:29,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:26:29,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:29,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674359465] [2023-11-06 22:26:29,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674359465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:26:29,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:26:29,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:26:29,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351008174] [2023-11-06 22:26:29,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:26:29,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:26:29,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:29,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:26:29,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:26:29,708 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:26:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:29,827 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2023-11-06 22:26:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:26:29,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-06 22:26:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:29,836 INFO L225 Difference]: With dead ends: 25 [2023-11-06 22:26:29,836 INFO L226 Difference]: Without dead ends: 15 [2023-11-06 22:26:29,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:26:29,842 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:29,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 31 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:26:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-06 22:26:29,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-06 22:26:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 22:26:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-06 22:26:29,877 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2023-11-06 22:26:29,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:29,878 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-06 22:26:29,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 22:26:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-06 22:26:29,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 22:26:29,880 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:29,880 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:29,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:26:29,881 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:29,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:29,882 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2023-11-06 22:26:29,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:29,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596253750] [2023-11-06 22:26:29,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:29,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:29,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:30,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:26:30,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:30,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596253750] [2023-11-06 22:26:30,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596253750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:30,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833948378] [2023-11-06 22:26:30,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:30,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:30,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:30,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:30,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:26:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:30,193 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:26:30,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:26:30,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:30,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:26:30,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833948378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:30,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:30,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2023-11-06 22:26:30,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332256282] [2023-11-06 22:26:30,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:30,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:26:30,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:30,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:26:30,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:26:30,548 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:26:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:30,629 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2023-11-06 22:26:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:26:30,630 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 16 [2023-11-06 22:26:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:30,631 INFO L225 Difference]: With dead ends: 22 [2023-11-06 22:26:30,631 INFO L226 Difference]: Without dead ends: 18 [2023-11-06 22:26:30,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:26:30,634 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:30,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 26 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:26:30,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-11-06 22:26:30,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-11-06 22:26:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-06 22:26:30,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-11-06 22:26:30,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2023-11-06 22:26:30,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:30,642 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-11-06 22:26:30,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.375) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-06 22:26:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-11-06 22:26:30,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 22:26:30,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:30,644 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:30,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:30,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:30,851 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:30,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:30,851 INFO L85 PathProgramCache]: Analyzing trace with hash -41010676, now seen corresponding path program 2 times [2023-11-06 22:26:30,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:30,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677339642] [2023-11-06 22:26:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:30,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:30,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:31,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:31,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:26:31,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:31,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677339642] [2023-11-06 22:26:31,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677339642] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:31,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462099395] [2023-11-06 22:26:31,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:26:31,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:31,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:31,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:31,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:26:31,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:26:31,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:31,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:26:31,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:31,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-06 22:26:31,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:31,753 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 22:26:31,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462099395] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:31,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:31,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 12 [2023-11-06 22:26:31,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586682699] [2023-11-06 22:26:31,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:31,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 22:26:31,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:31,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 22:26:31,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:26:31,761 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-06 22:26:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:31,857 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-11-06 22:26:31,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 22:26:31,858 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 22 [2023-11-06 22:26:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:31,859 INFO L225 Difference]: With dead ends: 25 [2023-11-06 22:26:31,859 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 22:26:31,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2023-11-06 22:26:31,862 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 22 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:31,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 36 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:26:31,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 22:26:31,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-06 22:26:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-06 22:26:31,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-11-06 22:26:31,869 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2023-11-06 22:26:31,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:31,870 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-11-06 22:26:31,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 12 states have internal predecessors, (23), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-06 22:26:31,871 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-11-06 22:26:31,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 22:26:31,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:31,872 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:31,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:32,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:32,079 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:32,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:32,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 3 times [2023-11-06 22:26:32,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:32,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687198967] [2023-11-06 22:26:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:32,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:32,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:32,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:32,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:32,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:26:32,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:32,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687198967] [2023-11-06 22:26:32,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687198967] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:32,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925678969] [2023-11-06 22:26:32,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:26:32,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:32,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:32,415 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:32,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:26:32,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:26:32,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:32,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 22:26:32,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:26:32,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-06 22:26:33,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925678969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:33,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:33,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 14 [2023-11-06 22:26:33,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984076352] [2023-11-06 22:26:33,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:33,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:26:33,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:33,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:26:33,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:26:33,220 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2023-11-06 22:26:33,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:33,318 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2023-11-06 22:26:33,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:26:33,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 28 [2023-11-06 22:26:33,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:33,323 INFO L225 Difference]: With dead ends: 28 [2023-11-06 22:26:33,323 INFO L226 Difference]: Without dead ends: 24 [2023-11-06 22:26:33,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:26:33,326 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:33,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:26:33,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-06 22:26:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-06 22:26:33,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-06 22:26:33,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-11-06 22:26:33,347 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2023-11-06 22:26:33,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:33,349 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-11-06 22:26:33,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.25) internal successors, (27), 14 states have internal predecessors, (27), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2023-11-06 22:26:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-11-06 22:26:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-06 22:26:33,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:33,353 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:33,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:33,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:33,563 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:33,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:33,564 INFO L85 PathProgramCache]: Analyzing trace with hash 371264716, now seen corresponding path program 4 times [2023-11-06 22:26:33,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:33,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673615225] [2023-11-06 22:26:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:33,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:33,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:33,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:33,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:33,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:33,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:33,889 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 22:26:33,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:33,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673615225] [2023-11-06 22:26:33,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673615225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:33,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521374308] [2023-11-06 22:26:33,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:26:33,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:33,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:33,897 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:33,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:26:33,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:26:33,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:33,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:26:33,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:34,018 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 22:26:34,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 22:26:34,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521374308] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:34,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:34,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 16 [2023-11-06 22:26:34,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732978028] [2023-11-06 22:26:34,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:34,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:26:34,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:34,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:26:34,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:26:34,895 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-06 22:26:34,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:34,979 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2023-11-06 22:26:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:26:34,979 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 34 [2023-11-06 22:26:34,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:34,981 INFO L225 Difference]: With dead ends: 31 [2023-11-06 22:26:34,981 INFO L226 Difference]: Without dead ends: 27 [2023-11-06 22:26:34,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2023-11-06 22:26:34,983 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 48 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 [2023-11-06 22:26:34,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 48 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:26:34,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-06 22:26:34,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-06 22:26:34,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-06 22:26:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2023-11-06 22:26:34,995 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2023-11-06 22:26:34,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:34,996 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2023-11-06 22:26:34,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 16 states have internal predecessors, (31), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2023-11-06 22:26:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2023-11-06 22:26:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-06 22:26:34,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:34,999 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:35,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:35,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:35,200 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:35,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:35,200 INFO L85 PathProgramCache]: Analyzing trace with hash -886339242, now seen corresponding path program 5 times [2023-11-06 22:26:35,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:35,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499444604] [2023-11-06 22:26:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:35,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:35,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:35,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:35,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:35,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:35,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:35,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-06 22:26:35,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:35,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499444604] [2023-11-06 22:26:35,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499444604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:35,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495286512] [2023-11-06 22:26:35,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:26:35,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:35,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:35,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:35,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:26:35,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-06 22:26:35,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:35,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 22:26:35,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-06 22:26:35,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 22:26:37,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495286512] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:37,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:37,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 15] total 18 [2023-11-06 22:26:37,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738916150] [2023-11-06 22:26:37,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:37,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-06 22:26:37,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:37,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-06 22:26:37,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-11-06 22:26:37,104 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-06 22:26:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:37,218 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2023-11-06 22:26:37,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 22:26:37,220 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 40 [2023-11-06 22:26:37,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:37,222 INFO L225 Difference]: With dead ends: 34 [2023-11-06 22:26:37,223 INFO L226 Difference]: Without dead ends: 30 [2023-11-06 22:26:37,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=373, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:26:37,225 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:37,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 59 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:26:37,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-06 22:26:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-06 22:26:37,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-06 22:26:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2023-11-06 22:26:37,240 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 40 [2023-11-06 22:26:37,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:37,243 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2023-11-06 22:26:37,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 18 states have internal predecessors, (35), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2023-11-06 22:26:37,243 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2023-11-06 22:26:37,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-06 22:26:37,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:37,245 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:37,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:37,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:37,457 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:37,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:37,458 INFO L85 PathProgramCache]: Analyzing trace with hash -918712436, now seen corresponding path program 6 times [2023-11-06 22:26:37,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:37,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580548209] [2023-11-06 22:26:37,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:37,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:37,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:37,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:37,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:37,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:37,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:37,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:37,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:37,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-06 22:26:38,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:38,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580548209] [2023-11-06 22:26:38,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580548209] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:38,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568418260] [2023-11-06 22:26:38,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:26:38,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:38,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:38,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:38,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:26:38,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-06 22:26:38,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:38,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:26:38,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:38,176 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-06 22:26:38,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:26:40,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568418260] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:40,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:40,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 17] total 20 [2023-11-06 22:26:40,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077378072] [2023-11-06 22:26:40,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:40,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-06 22:26:40,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:40,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-06 22:26:40,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2023-11-06 22:26:40,211 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-06 22:26:40,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:40,357 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2023-11-06 22:26:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:26:40,358 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 46 [2023-11-06 22:26:40,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:40,361 INFO L225 Difference]: With dead ends: 37 [2023-11-06 22:26:40,361 INFO L226 Difference]: Without dead ends: 33 [2023-11-06 22:26:40,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2023-11-06 22:26:40,363 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 77 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:40,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 69 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:26:40,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-06 22:26:40,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-06 22:26:40,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-06 22:26:40,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-11-06 22:26:40,368 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 46 [2023-11-06 22:26:40,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:40,369 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-11-06 22:26:40,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 20 states have internal predecessors, (39), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2023-11-06 22:26:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-11-06 22:26:40,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-06 22:26:40,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:40,371 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:40,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:40,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:40,575 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:40,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:40,576 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 7 times [2023-11-06 22:26:40,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:40,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597834908] [2023-11-06 22:26:40,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:40,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:40,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:40,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:40,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:40,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:40,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:40,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:41,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:41,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:41,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:41,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:41,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-06 22:26:41,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:41,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597834908] [2023-11-06 22:26:41,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597834908] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:41,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015656972] [2023-11-06 22:26:41,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:26:41,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:41,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:41,080 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:41,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:26:41,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:41,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-06 22:26:41,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-06 22:26:41,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-06 22:26:44,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015656972] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:44,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:44,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 19] total 22 [2023-11-06 22:26:44,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796446174] [2023-11-06 22:26:44,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:44,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-06 22:26:44,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:44,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-06 22:26:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-11-06 22:26:44,080 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2023-11-06 22:26:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:44,239 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2023-11-06 22:26:44,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 22:26:44,240 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 52 [2023-11-06 22:26:44,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:44,243 INFO L225 Difference]: With dead ends: 40 [2023-11-06 22:26:44,243 INFO L226 Difference]: Without dead ends: 36 [2023-11-06 22:26:44,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2023-11-06 22:26:44,246 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 88 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:44,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 62 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:26:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-06 22:26:44,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-06 22:26:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-06 22:26:44,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-11-06 22:26:44,259 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 52 [2023-11-06 22:26:44,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:44,262 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-11-06 22:26:44,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.15) internal successors, (43), 22 states have internal predecessors, (43), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2023-11-06 22:26:44,263 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-11-06 22:26:44,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-06 22:26:44,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:44,268 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:44,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:44,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:44,480 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:44,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:44,481 INFO L85 PathProgramCache]: Analyzing trace with hash -960511412, now seen corresponding path program 8 times [2023-11-06 22:26:44,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:44,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084526023] [2023-11-06 22:26:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:44,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:44,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:44,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:44,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:44,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:44,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:44,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:45,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:45,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:45,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 22:26:45,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:45,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084526023] [2023-11-06 22:26:45,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084526023] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:45,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372788561] [2023-11-06 22:26:45,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:26:45,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:45,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:45,123 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:45,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:26:45,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:26:45,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:45,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 22:26:45,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 22:26:45,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:49,064 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 22:26:49,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372788561] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:49,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:49,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 21] total 24 [2023-11-06 22:26:49,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871200226] [2023-11-06 22:26:49,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:49,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-06 22:26:49,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:49,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-06 22:26:49,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-11-06 22:26:49,068 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2023-11-06 22:26:49,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:49,219 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2023-11-06 22:26:49,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:26:49,220 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 58 [2023-11-06 22:26:49,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:49,221 INFO L225 Difference]: With dead ends: 43 [2023-11-06 22:26:49,221 INFO L226 Difference]: Without dead ends: 39 [2023-11-06 22:26:49,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 113 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=712, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 22:26:49,223 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:49,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 81 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:26:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-06 22:26:49,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-06 22:26:49,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-06 22:26:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2023-11-06 22:26:49,229 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 58 [2023-11-06 22:26:49,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:49,229 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2023-11-06 22:26:49,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 24 states have internal predecessors, (47), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2023-11-06 22:26:49,230 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2023-11-06 22:26:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-06 22:26:49,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:49,232 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:49,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:49,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:49,439 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:49,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:49,439 INFO L85 PathProgramCache]: Analyzing trace with hash -366706730, now seen corresponding path program 9 times [2023-11-06 22:26:49,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:49,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794291496] [2023-11-06 22:26:49,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:49,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:49,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:49,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:49,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:50,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:50,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:50,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:50,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:50,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:50,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:50,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:50,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-06 22:26:50,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:50,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794291496] [2023-11-06 22:26:50,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794291496] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:50,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009548299] [2023-11-06 22:26:50,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:26:50,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:50,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:50,361 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:50,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:26:50,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-06 22:26:50,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:50,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 22:26:50,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:50,673 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-06 22:26:50,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:26:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-06 22:26:55,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009548299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:26:55,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:26:55,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 23] total 25 [2023-11-06 22:26:55,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966694227] [2023-11-06 22:26:55,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:26:55,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:26:55,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:26:55,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:26:55,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:26:55,773 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2023-11-06 22:26:55,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:26:55,936 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2023-11-06 22:26:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:26:55,937 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) Word has length 64 [2023-11-06 22:26:55,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:26:55,938 INFO L225 Difference]: With dead ends: 46 [2023-11-06 22:26:55,938 INFO L226 Difference]: Without dead ends: 42 [2023-11-06 22:26:55,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 125 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=782, Unknown=0, NotChecked=0, Total=1190 [2023-11-06 22:26:55,940 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:26:55,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 90 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:26:55,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-06 22:26:55,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-06 22:26:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-06 22:26:55,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2023-11-06 22:26:55,946 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 64 [2023-11-06 22:26:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:26:55,947 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2023-11-06 22:26:55,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 25 states have internal predecessors, (50), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (28), 10 states have call predecessors, (28), 12 states have call successors, (28) [2023-11-06 22:26:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2023-11-06 22:26:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-06 22:26:55,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:26:55,948 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:26:55,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:26:56,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:26:56,161 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:26:56,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:26:56,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1719425780, now seen corresponding path program 10 times [2023-11-06 22:26:56,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:26:56,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439301515] [2023-11-06 22:26:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:26:56,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:26:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:56,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:57,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:57,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:57,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:57,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:57,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:57,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:57,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:58,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:58,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:58,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:58,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:58,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:58,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 22:26:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:26:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2023-11-06 22:26:58,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:26:58,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439301515] [2023-11-06 22:26:58,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439301515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:26:58,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508738900] [2023-11-06 22:26:58,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:26:58,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:26:58,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:26:58,368 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:26:58,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:26:58,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:26:58,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:26:58,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-06 22:26:58,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:26:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 19 proven. 155 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-06 22:26:59,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:27:03,373 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-11-06 22:27:03,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508738900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:27:03,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:27:03,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 29, 29] total 41 [2023-11-06 22:27:03,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058340196] [2023-11-06 22:27:03,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:27:03,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-06 22:27:03,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:27:03,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-06 22:27:03,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1544, Unknown=0, NotChecked=0, Total=1640 [2023-11-06 22:27:03,379 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 41 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 27 states have internal predecessors, (47), 6 states have call successors, (6), 1 states have call predecessors, (6), 14 states have return successors, (15), 14 states have call predecessors, (15), 6 states have call successors, (15) [2023-11-06 22:27:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:27:04,773 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2023-11-06 22:27:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 22:27:04,774 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 27 states have internal predecessors, (47), 6 states have call successors, (6), 1 states have call predecessors, (6), 14 states have return successors, (15), 14 states have call predecessors, (15), 6 states have call successors, (15) Word has length 70 [2023-11-06 22:27:04,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:27:04,775 INFO L225 Difference]: With dead ends: 45 [2023-11-06 22:27:04,775 INFO L226 Difference]: Without dead ends: 0 [2023-11-06 22:27:04,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=405, Invalid=4151, Unknown=0, NotChecked=0, Total=4556 [2023-11-06 22:27:04,778 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 867 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:27:04,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 417 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 867 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:27:04,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-06 22:27:04,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-06 22:27:04,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:27:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-06 22:27:04,780 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2023-11-06 22:27:04,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:27:04,780 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-06 22:27:04,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 27 states have internal predecessors, (47), 6 states have call successors, (6), 1 states have call predecessors, (6), 14 states have return successors, (15), 14 states have call predecessors, (15), 6 states have call successors, (15) [2023-11-06 22:27:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-06 22:27:04,780 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-06 22:27:04,783 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-06 22:27:04,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:27:04,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 22:27:04,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-06 22:27:05,016 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-06 22:27:05,016 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-11-06 22:27:05,016 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-11-06 22:27:05,016 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2023-11-06 22:27:05,016 INFO L899 garLoopResultBuilder]: For program point L18(line 18) no Hoare annotation was computed. [2023-11-06 22:27:05,016 INFO L899 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2023-11-06 22:27:05,017 INFO L895 garLoopResultBuilder]: At program point L16(line 16) the Hoare annotation is: (and (= |ULTIMATE.start_main_~b~0#1| 0) (= |ULTIMATE.start_main_~a~0#1| 10)) [2023-11-06 22:27:05,017 INFO L899 garLoopResultBuilder]: For program point L16-1(line 16) no Hoare annotation was computed. [2023-11-06 22:27:05,017 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 20) no Hoare annotation was computed. [2023-11-06 22:27:05,017 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-06 22:27:05,017 INFO L899 garLoopResultBuilder]: For program point sumEXIT(lines 5 11) no Hoare annotation was computed. [2023-11-06 22:27:05,017 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 5 11) the Hoare annotation is: true [2023-11-06 22:27:05,017 INFO L895 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (and (= sum_~n |sum_#in~n|) (= sum_~m |sum_#in~m|) (<= 1 sum_~n)) [2023-11-06 22:27:05,018 INFO L899 garLoopResultBuilder]: For program point L9-1(line 9) no Hoare annotation was computed. [2023-11-06 22:27:05,018 INFO L899 garLoopResultBuilder]: For program point L6(lines 6 10) no Hoare annotation was computed. [2023-11-06 22:27:05,018 INFO L899 garLoopResultBuilder]: For program point sumFINAL(lines 5 11) no Hoare annotation was computed. [2023-11-06 22:27:05,021 INFO L445 BasicCegarLoop]: Path program histogram: [10, 1] [2023-11-06 22:27:05,024 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 22:27:05,027 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:27:05 BoogieIcfgContainer [2023-11-06 22:27:05,028 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 22:27:05,028 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 22:27:05,028 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 22:27:05,028 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 22:27:05,029 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:26:29" (3/4) ... [2023-11-06 22:27:05,030 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-06 22:27:05,034 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure sum [2023-11-06 22:27:05,038 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-11-06 22:27:05,039 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-06 22:27:05,039 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-06 22:27:05,039 INFO L939 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-06 22:27:05,083 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.graphml [2023-11-06 22:27:05,084 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/witness.graphml.yaml [2023-11-06 22:27:05,084 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 22:27:05,084 INFO L158 Benchmark]: Toolchain (without parser) took 36625.74ms. Allocated memory was 165.7MB in the beginning and 371.2MB in the end (delta: 205.5MB). Free memory was 123.2MB in the beginning and 325.2MB in the end (delta: -201.9MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2023-11-06 22:27:05,085 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory was 60.0MB in the beginning and 59.8MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:27:05,085 INFO L158 Benchmark]: CACSL2BoogieTranslator took 280.58ms. Allocated memory is still 165.7MB. Free memory was 123.2MB in the beginning and 113.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:27:05,086 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.03ms. Allocated memory is still 165.7MB. Free memory was 113.3MB in the beginning and 112.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:27:05,086 INFO L158 Benchmark]: Boogie Preprocessor took 20.41ms. Allocated memory is still 165.7MB. Free memory was 112.0MB in the beginning and 110.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:27:05,086 INFO L158 Benchmark]: RCFGBuilder took 350.19ms. Allocated memory is still 165.7MB. Free memory was 110.8MB in the beginning and 101.6MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-06 22:27:05,087 INFO L158 Benchmark]: TraceAbstraction took 35870.57ms. Allocated memory was 165.7MB in the beginning and 371.2MB in the end (delta: 205.5MB). Free memory was 100.7MB in the beginning and 327.3MB in the end (delta: -226.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 22:27:05,087 INFO L158 Benchmark]: Witness Printer took 55.85ms. Allocated memory is still 371.2MB. Free memory was 327.3MB in the beginning and 325.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 22:27:05,089 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 109.1MB. Free memory was 60.0MB in the beginning and 59.8MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 280.58ms. Allocated memory is still 165.7MB. Free memory was 123.2MB in the beginning and 113.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.03ms. Allocated memory is still 165.7MB. Free memory was 113.3MB in the beginning and 112.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.41ms. Allocated memory is still 165.7MB. Free memory was 112.0MB in the beginning and 110.8MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 350.19ms. Allocated memory is still 165.7MB. Free memory was 110.8MB in the beginning and 101.6MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 35870.57ms. Allocated memory was 165.7MB in the beginning and 371.2MB in the end (delta: 205.5MB). Free memory was 100.7MB in the beginning and 327.3MB in the end (delta: -226.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 55.85ms. Allocated memory is still 371.2MB. Free memory was 327.3MB in the beginning and 325.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 35.8s, OverallIterations: 11, TraceHistogramMax: 11, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 555 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 480 mSDsluCounter, 961 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 853 mSDsCounter, 179 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1348 IncrementalHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 179 mSolverCounterUnsat, 108 mSDtfsCounter, 1348 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1165 GetRequests, 843 SyntacticMatches, 55 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2229 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=10, InterpolantAutomatonStates: 125, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 18 HoareAnnotationTreeSize, 5 FomulaSimplifications, 3 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 29.0s InterpolantComputationTime, 870 NumberOfCodeBlocks, 864 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 1269 ConstructedInterpolants, 0 QuantifiedInterpolants, 3974 SizeOfPredicates, 68 NumberOfNonLiveVariables, 1421 ConjunctsInSsa, 223 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 1646/3630 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-06 22:27:05,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c551693c-bc5d-40ec-bd8f-943293769827/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE