./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem15_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/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_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem15_label01.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/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_f43ffad6-df23-40f3-90a2-ddb9edb80734/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 d6090139f17d215360e170ecc95bb73008b0f6956bdca2966cee2f9efad851e4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:06:45,509 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:06:45,646 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:06:45,655 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:06:45,658 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:06:45,701 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:06:45,702 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:06:45,702 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:06:45,703 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:06:45,708 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:06:45,710 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:06:45,711 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:06:45,711 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:06:45,713 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:06:45,714 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:06:45,714 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:06:45,715 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:06:45,715 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:06:45,716 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:06:45,716 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:06:45,716 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:06:45,717 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:06:45,717 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:06:45,718 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:06:45,718 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:06:45,719 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:06:45,720 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:06:45,720 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:06:45,720 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:06:45,721 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:06:45,722 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:06:45,723 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:06:45,723 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:06:45,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:06:45,723 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:06:45,724 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:06:45,724 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:06:45,724 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:06:45,724 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:06:45,725 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_f43ffad6-df23-40f3-90a2-ddb9edb80734/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6090139f17d215360e170ecc95bb73008b0f6956bdca2966cee2f9efad851e4 [2023-11-06 22:06:46,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:06:46,054 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:06:46,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:06:46,058 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:06:46,059 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:06:46,061 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/eca-rers2012/Problem15_label01.c [2023-11-06 22:06:49,308 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:06:49,894 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:06:49,894 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/sv-benchmarks/c/eca-rers2012/Problem15_label01.c [2023-11-06 22:06:49,920 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/data/bbb47cfdc/a276e4c833214a20a3b0a52e2950f951/FLAG378a39300 [2023-11-06 22:06:49,937 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/data/bbb47cfdc/a276e4c833214a20a3b0a52e2950f951 [2023-11-06 22:06:49,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:06:49,945 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:06:49,948 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:06:49,948 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:06:49,954 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:06:49,955 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:06:49" (1/1) ... [2023-11-06 22:06:49,956 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57b3af43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:49, skipping insertion in model container [2023-11-06 22:06:49,956 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:06:49" (1/1) ... [2023-11-06 22:06:50,055 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:06:50,344 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_f43ffad6-df23-40f3-90a2-ddb9edb80734/sv-benchmarks/c/eca-rers2012/Problem15_label01.c[5470,5483] [2023-11-06 22:06:50,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:06:50,899 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:06:50,921 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_f43ffad6-df23-40f3-90a2-ddb9edb80734/sv-benchmarks/c/eca-rers2012/Problem15_label01.c[5470,5483] [2023-11-06 22:06:51,164 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:06:51,184 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:06:51,185 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:51 WrapperNode [2023-11-06 22:06:51,185 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:06:51,187 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:06:51,187 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:06:51,187 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:06:51,195 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:51" (1/1) ... [2023-11-06 22:06:51,246 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:51" (1/1) ... [2023-11-06 22:06:51,442 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1759 [2023-11-06 22:06:51,443 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:06:51,444 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:06:51,444 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:06:51,444 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:06:51,454 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:51" (1/1) ... [2023-11-06 22:06:51,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:51" (1/1) ... [2023-11-06 22:06:51,473 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:51" (1/1) ... [2023-11-06 22:06:51,473 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:51" (1/1) ... [2023-11-06 22:06:51,548 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:51" (1/1) ... [2023-11-06 22:06:51,561 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:51" (1/1) ... [2023-11-06 22:06:51,596 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:51" (1/1) ... [2023-11-06 22:06:51,605 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:51" (1/1) ... [2023-11-06 22:06:51,646 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:06:51,647 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:06:51,647 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:06:51,648 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:06:51,648 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:51" (1/1) ... [2023-11-06 22:06:51,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:06:51,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:06:51,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:06:51,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:06:51,725 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:06:51,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:06:51,726 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:06:51,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:06:51,814 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:06:51,816 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:06:55,950 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:06:55,962 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:06:55,962 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:06:55,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:06:55 BoogieIcfgContainer [2023-11-06 22:06:55,966 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:06:55,968 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:06:55,969 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:06:55,972 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:06:55,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:06:49" (1/3) ... [2023-11-06 22:06:55,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26e759bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:06:55, skipping insertion in model container [2023-11-06 22:06:55,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:06:51" (2/3) ... [2023-11-06 22:06:55,974 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26e759bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:06:55, skipping insertion in model container [2023-11-06 22:06:55,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:06:55" (3/3) ... [2023-11-06 22:06:55,976 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label01.c [2023-11-06 22:06:55,997 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:06:55,998 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:06:56,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:06:56,070 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;@3ec69753, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:06:56,070 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:06:56,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 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 22:06:56,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-06 22:06:56,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:56,086 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:56,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:56,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:56,093 INFO L85 PathProgramCache]: Analyzing trace with hash 626000386, now seen corresponding path program 1 times [2023-11-06 22:06:56,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:56,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666943219] [2023-11-06 22:06:56,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:56,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:06:56,525 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 22:06:56,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:06:56,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666943219] [2023-11-06 22:06:56,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666943219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:06:56,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:06:56,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:06:56,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455254109] [2023-11-06 22:06:56,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:06:56,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:06:56,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:06:56,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:06:56,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:56,583 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 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) Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 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 22:06:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:06:59,695 INFO L93 Difference]: Finished difference Result 1154 states and 2106 transitions. [2023-11-06 22:06:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:06:59,698 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 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) Word has length 44 [2023-11-06 22:06:59,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:06:59,717 INFO L225 Difference]: With dead ends: 1154 [2023-11-06 22:06:59,718 INFO L226 Difference]: Without dead ends: 665 [2023-11-06 22:06:59,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:06:59,727 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 277 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:06:59,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 383 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-06 22:06:59,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2023-11-06 22:06:59,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663. [2023-11-06 22:06:59,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.4818731117824773) internal successors, (981), 662 states have internal predecessors, (981), 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 22:06:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 981 transitions. [2023-11-06 22:06:59,863 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 981 transitions. Word has length 44 [2023-11-06 22:06:59,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:06:59,864 INFO L495 AbstractCegarLoop]: Abstraction has 663 states and 981 transitions. [2023-11-06 22:06:59,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 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 22:06:59,865 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 981 transitions. [2023-11-06 22:06:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-06 22:06:59,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:06:59,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:06:59,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:06:59,871 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:06:59,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:06:59,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1760666973, now seen corresponding path program 1 times [2023-11-06 22:06:59,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:06:59,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707086739] [2023-11-06 22:06:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:06:59,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:06:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:00,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:00,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707086739] [2023-11-06 22:07:00,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707086739] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:07:00,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:07:00,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:07:00,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421240840] [2023-11-06 22:07:00,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:07:00,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:07:00,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:00,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:07:00,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:00,407 INFO L87 Difference]: Start difference. First operand 663 states and 981 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 22:07:02,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:02,583 INFO L93 Difference]: Finished difference Result 1624 states and 2315 transitions. [2023-11-06 22:07:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:07:02,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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) Word has length 109 [2023-11-06 22:07:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:02,591 INFO L225 Difference]: With dead ends: 1624 [2023-11-06 22:07:02,592 INFO L226 Difference]: Without dead ends: 963 [2023-11-06 22:07:02,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:02,597 INFO L413 NwaCegarLoop]: 299 mSDtfsCounter, 237 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:02,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 337 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-06 22:07:02,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2023-11-06 22:07:02,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2023-11-06 22:07:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.362785862785863) internal successors, (1311), 962 states have internal predecessors, (1311), 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 22:07:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1311 transitions. [2023-11-06 22:07:02,642 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1311 transitions. Word has length 109 [2023-11-06 22:07:02,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:02,642 INFO L495 AbstractCegarLoop]: Abstraction has 963 states and 1311 transitions. [2023-11-06 22:07:02,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 2 states have internal predecessors, (109), 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 22:07:02,643 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1311 transitions. [2023-11-06 22:07:02,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-11-06 22:07:02,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:02,648 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:02,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:07:02,649 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:02,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:02,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1367533996, now seen corresponding path program 1 times [2023-11-06 22:07:02,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:02,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747198427] [2023-11-06 22:07:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:02,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:03,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:03,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747198427] [2023-11-06 22:07:03,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747198427] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:07:03,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:07:03,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:07:03,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116020194] [2023-11-06 22:07:03,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:07:03,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:07:03,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:03,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:07:03,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:07:03,118 INFO L87 Difference]: Start difference. First operand 963 states and 1311 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 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 22:07:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:06,182 INFO L93 Difference]: Finished difference Result 2240 states and 3197 transitions. [2023-11-06 22:07:06,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:07:06,182 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 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) Word has length 114 [2023-11-06 22:07:06,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:06,192 INFO L225 Difference]: With dead ends: 2240 [2023-11-06 22:07:06,192 INFO L226 Difference]: Without dead ends: 1578 [2023-11-06 22:07:06,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:07:06,196 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 359 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 2144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:06,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 360 Invalid, 2144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 1664 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-06 22:07:06,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2023-11-06 22:07:06,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1266. [2023-11-06 22:07:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 1.3051383399209486) internal successors, (1651), 1265 states have internal predecessors, (1651), 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 22:07:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1651 transitions. [2023-11-06 22:07:06,242 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1651 transitions. Word has length 114 [2023-11-06 22:07:06,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:06,243 INFO L495 AbstractCegarLoop]: Abstraction has 1266 states and 1651 transitions. [2023-11-06 22:07:06,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 4 states have internal predecessors, (114), 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 22:07:06,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1651 transitions. [2023-11-06 22:07:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-06 22:07:06,249 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:06,249 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:06,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:07:06,250 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:06,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:06,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1300079150, now seen corresponding path program 1 times [2023-11-06 22:07:06,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:06,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096019061] [2023-11-06 22:07:06,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:06,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:06,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:06,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096019061] [2023-11-06 22:07:06,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096019061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:07:06,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:07:06,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:07:06,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405587293] [2023-11-06 22:07:06,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:07:06,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:07:06,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:06,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:07:06,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:07:06,464 INFO L87 Difference]: Start difference. First operand 1266 states and 1651 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 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 22:07:10,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:10,871 INFO L93 Difference]: Finished difference Result 4668 states and 6173 transitions. [2023-11-06 22:07:10,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:07:10,871 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 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) Word has length 135 [2023-11-06 22:07:10,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:10,890 INFO L225 Difference]: With dead ends: 4668 [2023-11-06 22:07:10,891 INFO L226 Difference]: Without dead ends: 3404 [2023-11-06 22:07:10,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:07:10,895 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 520 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:10,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 346 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1953 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-06 22:07:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2023-11-06 22:07:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 3381. [2023-11-06 22:07:10,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 1.2366863905325445) internal successors, (4180), 3380 states have internal predecessors, (4180), 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 22:07:11,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 4180 transitions. [2023-11-06 22:07:11,022 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 4180 transitions. Word has length 135 [2023-11-06 22:07:11,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:11,024 INFO L495 AbstractCegarLoop]: Abstraction has 3381 states and 4180 transitions. [2023-11-06 22:07:11,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 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 22:07:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 4180 transitions. [2023-11-06 22:07:11,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-06 22:07:11,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:11,038 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:11,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:07:11,039 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:11,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:11,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1749227933, now seen corresponding path program 1 times [2023-11-06 22:07:11,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:11,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625404346] [2023-11-06 22:07:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:11,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-06 22:07:11,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:11,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625404346] [2023-11-06 22:07:11,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625404346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:07:11,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:07:11,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:07:11,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264990024] [2023-11-06 22:07:11,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:07:11,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:07:11,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:11,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:07:11,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:11,324 INFO L87 Difference]: Start difference. First operand 3381 states and 4180 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 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 22:07:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:13,498 INFO L93 Difference]: Finished difference Result 8563 states and 10754 transitions. [2023-11-06 22:07:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:07:13,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 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) Word has length 203 [2023-11-06 22:07:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:13,527 INFO L225 Difference]: With dead ends: 8563 [2023-11-06 22:07:13,527 INFO L226 Difference]: Without dead ends: 5483 [2023-11-06 22:07:13,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:13,532 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:13,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 337 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-06 22:07:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2023-11-06 22:07:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5478. [2023-11-06 22:07:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.16870549570933) internal successors, (6401), 5477 states have internal predecessors, (6401), 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 22:07:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6401 transitions. [2023-11-06 22:07:13,672 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6401 transitions. Word has length 203 [2023-11-06 22:07:13,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:13,673 INFO L495 AbstractCegarLoop]: Abstraction has 5478 states and 6401 transitions. [2023-11-06 22:07:13,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 2 states have internal predecessors, (137), 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 22:07:13,673 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6401 transitions. [2023-11-06 22:07:13,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2023-11-06 22:07:13,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:13,682 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:13,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:07:13,682 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:13,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:13,684 INFO L85 PathProgramCache]: Analyzing trace with hash -92208819, now seen corresponding path program 1 times [2023-11-06 22:07:13,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:13,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771452769] [2023-11-06 22:07:13,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:13,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 22:07:14,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:14,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771452769] [2023-11-06 22:07:14,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771452769] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:07:14,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:07:14,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:07:14,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227073216] [2023-11-06 22:07:14,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:07:14,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:07:14,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:14,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:07:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:14,526 INFO L87 Difference]: Start difference. First operand 5478 states and 6401 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 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 22:07:16,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:16,929 INFO L93 Difference]: Finished difference Result 10655 states and 12489 transitions. [2023-11-06 22:07:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:07:16,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 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) Word has length 305 [2023-11-06 22:07:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:16,959 INFO L225 Difference]: With dead ends: 10655 [2023-11-06 22:07:16,959 INFO L226 Difference]: Without dead ends: 5478 [2023-11-06 22:07:16,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:16,966 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:16,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-06 22:07:16,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2023-11-06 22:07:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 5478. [2023-11-06 22:07:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.1676100054774512) internal successors, (6395), 5477 states have internal predecessors, (6395), 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 22:07:17,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6395 transitions. [2023-11-06 22:07:17,090 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6395 transitions. Word has length 305 [2023-11-06 22:07:17,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:17,091 INFO L495 AbstractCegarLoop]: Abstraction has 5478 states and 6395 transitions. [2023-11-06 22:07:17,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 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 22:07:17,092 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6395 transitions. [2023-11-06 22:07:17,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-06 22:07:17,098 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:17,099 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:17,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:07:17,099 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:17,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:17,100 INFO L85 PathProgramCache]: Analyzing trace with hash 691630654, now seen corresponding path program 1 times [2023-11-06 22:07:17,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:17,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102758247] [2023-11-06 22:07:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:17,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:17,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-06 22:07:17,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:17,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102758247] [2023-11-06 22:07:17,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102758247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:07:17,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:07:17,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:07:17,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395323841] [2023-11-06 22:07:17,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:07:17,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:07:17,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:17,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:07:17,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:17,488 INFO L87 Difference]: Start difference. First operand 5478 states and 6395 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 22:07:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:19,935 INFO L93 Difference]: Finished difference Result 12758 states and 15193 transitions. [2023-11-06 22:07:19,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:07:19,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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) Word has length 331 [2023-11-06 22:07:19,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:19,981 INFO L225 Difference]: With dead ends: 12758 [2023-11-06 22:07:19,981 INFO L226 Difference]: Without dead ends: 7581 [2023-11-06 22:07:19,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:19,990 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 272 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:19,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 671 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-06 22:07:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7581 states. [2023-11-06 22:07:20,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7581 to 7579. [2023-11-06 22:07:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7579 states, 7578 states have (on average 1.1421219319081553) internal successors, (8655), 7578 states have internal predecessors, (8655), 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 22:07:20,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7579 states to 7579 states and 8655 transitions. [2023-11-06 22:07:20,164 INFO L78 Accepts]: Start accepts. Automaton has 7579 states and 8655 transitions. Word has length 331 [2023-11-06 22:07:20,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:20,164 INFO L495 AbstractCegarLoop]: Abstraction has 7579 states and 8655 transitions. [2023-11-06 22:07:20,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 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 22:07:20,165 INFO L276 IsEmpty]: Start isEmpty. Operand 7579 states and 8655 transitions. [2023-11-06 22:07:20,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2023-11-06 22:07:20,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:20,175 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:20,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:07:20,176 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:20,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:20,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1024558271, now seen corresponding path program 1 times [2023-11-06 22:07:20,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:20,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231679824] [2023-11-06 22:07:20,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:20,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:20,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2023-11-06 22:07:20,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:20,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231679824] [2023-11-06 22:07:20,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231679824] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:07:20,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:07:20,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:07:20,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836332447] [2023-11-06 22:07:20,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:07:20,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:07:20,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:20,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:07:20,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:20,653 INFO L87 Difference]: Start difference. First operand 7579 states and 8655 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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 22:07:23,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:23,012 INFO L93 Difference]: Finished difference Result 16956 states and 19716 transitions. [2023-11-06 22:07:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:07:23,013 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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) Word has length 390 [2023-11-06 22:07:23,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:23,048 INFO L225 Difference]: With dead ends: 16956 [2023-11-06 22:07:23,048 INFO L226 Difference]: Without dead ends: 9678 [2023-11-06 22:07:23,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:23,058 INFO L413 NwaCegarLoop]: 598 mSDtfsCounter, 283 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:23,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 635 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-06 22:07:23,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9678 states. [2023-11-06 22:07:23,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9678 to 8781. [2023-11-06 22:07:23,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8781 states, 8780 states have (on average 1.1329157175398634) internal successors, (9947), 8780 states have internal predecessors, (9947), 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 22:07:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8781 states to 8781 states and 9947 transitions. [2023-11-06 22:07:23,283 INFO L78 Accepts]: Start accepts. Automaton has 8781 states and 9947 transitions. Word has length 390 [2023-11-06 22:07:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:23,284 INFO L495 AbstractCegarLoop]: Abstraction has 8781 states and 9947 transitions. [2023-11-06 22:07:23,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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 22:07:23,285 INFO L276 IsEmpty]: Start isEmpty. Operand 8781 states and 9947 transitions. [2023-11-06 22:07:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2023-11-06 22:07:23,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:23,295 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:23,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:07:23,295 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:23,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:23,296 INFO L85 PathProgramCache]: Analyzing trace with hash -289447111, now seen corresponding path program 1 times [2023-11-06 22:07:23,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:23,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092913654] [2023-11-06 22:07:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:23,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 83 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:24,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:24,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092913654] [2023-11-06 22:07:24,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092913654] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:24,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655737942] [2023-11-06 22:07:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:24,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:24,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:24,517 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:24,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:07:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:24,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:07:24,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:25,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:30,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655737942] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:30,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:07:30,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2023-11-06 22:07:30,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747986156] [2023-11-06 22:07:30,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:07:30,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:07:30,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:07:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:07:30,913 INFO L87 Difference]: Start difference. First operand 8781 states and 9947 transitions. Second operand has 5 states, 5 states have (on average 78.2) internal successors, (391), 4 states have internal predecessors, (391), 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 22:07:38,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:38,493 INFO L93 Difference]: Finished difference Result 24494 states and 28334 transitions. [2023-11-06 22:07:38,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:07:38,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 78.2) internal successors, (391), 4 states have internal predecessors, (391), 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) Word has length 391 [2023-11-06 22:07:38,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:38,525 INFO L225 Difference]: With dead ends: 24494 [2023-11-06 22:07:38,525 INFO L226 Difference]: Without dead ends: 16014 [2023-11-06 22:07:38,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 784 GetRequests, 776 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:07:38,537 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 624 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 843 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 843 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:38,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 109 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [843 Valid, 1862 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-11-06 22:07:38,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16014 states. [2023-11-06 22:07:38,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16014 to 15078. [2023-11-06 22:07:38,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15078 states, 15077 states have (on average 1.160907342309478) internal successors, (17503), 15077 states have internal predecessors, (17503), 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 22:07:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15078 states to 15078 states and 17503 transitions. [2023-11-06 22:07:38,878 INFO L78 Accepts]: Start accepts. Automaton has 15078 states and 17503 transitions. Word has length 391 [2023-11-06 22:07:38,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:38,879 INFO L495 AbstractCegarLoop]: Abstraction has 15078 states and 17503 transitions. [2023-11-06 22:07:38,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.2) internal successors, (391), 4 states have internal predecessors, (391), 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 22:07:38,879 INFO L276 IsEmpty]: Start isEmpty. Operand 15078 states and 17503 transitions. [2023-11-06 22:07:38,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2023-11-06 22:07:38,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:38,890 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:38,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:07:39,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:39,096 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:39,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:39,097 INFO L85 PathProgramCache]: Analyzing trace with hash 577355242, now seen corresponding path program 1 times [2023-11-06 22:07:39,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:39,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518363631] [2023-11-06 22:07:39,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:39,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:39,511 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 163 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:39,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:39,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518363631] [2023-11-06 22:07:39,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518363631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:07:39,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:07:39,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:07:39,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311649001] [2023-11-06 22:07:39,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:07:39,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:07:39,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:39,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:07:39,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:39,519 INFO L87 Difference]: Start difference. First operand 15078 states and 17503 transitions. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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 22:07:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:42,089 INFO L93 Difference]: Finished difference Result 33447 states and 39636 transitions. [2023-11-06 22:07:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:07:42,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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) Word has length 407 [2023-11-06 22:07:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:42,126 INFO L225 Difference]: With dead ends: 33447 [2023-11-06 22:07:42,127 INFO L226 Difference]: Without dead ends: 18670 [2023-11-06 22:07:42,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:42,144 INFO L413 NwaCegarLoop]: 584 mSDtfsCounter, 246 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:42,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 622 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-06 22:07:42,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18670 states. [2023-11-06 22:07:42,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18670 to 17765. [2023-11-06 22:07:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17765 states, 17764 states have (on average 1.1506417473541994) internal successors, (20440), 17764 states have internal predecessors, (20440), 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 22:07:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17765 states to 17765 states and 20440 transitions. [2023-11-06 22:07:42,447 INFO L78 Accepts]: Start accepts. Automaton has 17765 states and 20440 transitions. Word has length 407 [2023-11-06 22:07:42,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:42,448 INFO L495 AbstractCegarLoop]: Abstraction has 17765 states and 20440 transitions. [2023-11-06 22:07:42,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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 22:07:42,449 INFO L276 IsEmpty]: Start isEmpty. Operand 17765 states and 20440 transitions. [2023-11-06 22:07:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2023-11-06 22:07:42,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:42,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:42,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:07:42,462 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:42,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:42,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1611690732, now seen corresponding path program 1 times [2023-11-06 22:07:42,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:42,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608394636] [2023-11-06 22:07:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:42,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-11-06 22:07:42,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:42,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608394636] [2023-11-06 22:07:42,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608394636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:07:42,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:07:42,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:07:42,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771205096] [2023-11-06 22:07:42,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:07:42,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:07:42,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:42,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:07:42,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:42,920 INFO L87 Difference]: Start difference. First operand 17765 states and 20440 transitions. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 22:07:45,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:07:45,431 INFO L93 Difference]: Finished difference Result 42723 states and 49427 transitions. [2023-11-06 22:07:45,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:07:45,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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) Word has length 453 [2023-11-06 22:07:45,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:07:45,476 INFO L225 Difference]: With dead ends: 42723 [2023-11-06 22:07:45,476 INFO L226 Difference]: Without dead ends: 25259 [2023-11-06 22:07:45,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:07:45,498 INFO L413 NwaCegarLoop]: 588 mSDtfsCounter, 283 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:07:45,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 621 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-06 22:07:45,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25259 states. [2023-11-06 22:07:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25259 to 24945. [2023-11-06 22:07:45,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24945 states, 24944 states have (on average 1.131213919178961) internal successors, (28217), 24944 states have internal predecessors, (28217), 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 22:07:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24945 states to 24945 states and 28217 transitions. [2023-11-06 22:07:46,014 INFO L78 Accepts]: Start accepts. Automaton has 24945 states and 28217 transitions. Word has length 453 [2023-11-06 22:07:46,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:07:46,015 INFO L495 AbstractCegarLoop]: Abstraction has 24945 states and 28217 transitions. [2023-11-06 22:07:46,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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 22:07:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 24945 states and 28217 transitions. [2023-11-06 22:07:46,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2023-11-06 22:07:46,024 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:07:46,024 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:07:46,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:07:46,025 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:07:46,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:07:46,026 INFO L85 PathProgramCache]: Analyzing trace with hash 319650045, now seen corresponding path program 1 times [2023-11-06 22:07:46,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:07:46,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37375824] [2023-11-06 22:07:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:46,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:07:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 42 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:07:47,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:07:47,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37375824] [2023-11-06 22:07:47,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37375824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:07:47,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326462017] [2023-11-06 22:07:47,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:07:47,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:07:47,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:07:47,347 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:07:47,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:07:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:07:47,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:07:47,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:07:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 236 proven. 106 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 22:07:51,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:07:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 236 proven. 106 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-06 22:07:54,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326462017] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:07:54,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:07:54,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 8 [2023-11-06 22:07:54,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750564275] [2023-11-06 22:07:54,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:07:54,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:07:54,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:07:54,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:07:54,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:07:54,762 INFO L87 Difference]: Start difference. First operand 24945 states and 28217 transitions. Second operand has 9 states, 9 states have (on average 118.0) internal successors, (1062), 8 states have internal predecessors, (1062), 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 22:08:11,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:11,835 INFO L93 Difference]: Finished difference Result 90984 states and 102445 transitions. [2023-11-06 22:08:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 22:08:11,836 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 118.0) internal successors, (1062), 8 states have internal predecessors, (1062), 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) Word has length 498 [2023-11-06 22:08:11,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:11,920 INFO L225 Difference]: With dead ends: 90984 [2023-11-06 22:08:11,921 INFO L226 Difference]: Without dead ends: 66340 [2023-11-06 22:08:11,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1013 GetRequests, 992 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2023-11-06 22:08:11,936 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 5676 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 6546 mSolverCounterSat, 2949 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5676 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 9495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2949 IncrementalHoareTripleChecker+Valid, 6546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:11,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5676 Valid, 254 Invalid, 9495 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2949 Valid, 6546 Invalid, 0 Unknown, 0 Unchecked, 16.0s Time] [2023-11-06 22:08:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66340 states. [2023-11-06 22:08:12,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66340 to 46492. [2023-11-06 22:08:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46492 states, 46491 states have (on average 1.126863263857521) internal successors, (52389), 46491 states have internal predecessors, (52389), 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 22:08:12,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46492 states to 46492 states and 52389 transitions. [2023-11-06 22:08:12,907 INFO L78 Accepts]: Start accepts. Automaton has 46492 states and 52389 transitions. Word has length 498 [2023-11-06 22:08:12,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:12,908 INFO L495 AbstractCegarLoop]: Abstraction has 46492 states and 52389 transitions. [2023-11-06 22:08:12,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 118.0) internal successors, (1062), 8 states have internal predecessors, (1062), 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 22:08:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 46492 states and 52389 transitions. [2023-11-06 22:08:12,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2023-11-06 22:08:12,915 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:12,918 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:08:12,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:13,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:08:13,136 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:13,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1407121983, now seen corresponding path program 1 times [2023-11-06 22:08:13,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:13,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378559117] [2023-11-06 22:08:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:13,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 125 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:14,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:14,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378559117] [2023-11-06 22:08:14,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378559117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:08:14,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401688322] [2023-11-06 22:08:14,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:14,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:14,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:14,882 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:14,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:08:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:15,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:08:15,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 42 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:15,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:08:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 384 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:17,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401688322] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:08:17,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:08:17,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 12 [2023-11-06 22:08:17,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404559433] [2023-11-06 22:08:17,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:08:17,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:08:17,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:17,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:08:17,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=83, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:08:17,239 INFO L87 Difference]: Start difference. First operand 46492 states and 52389 transitions. Second operand has 6 states, 6 states have (on average 85.0) internal successors, (510), 5 states have internal predecessors, (510), 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 22:08:24,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:24,336 INFO L93 Difference]: Finished difference Result 103495 states and 116247 transitions. [2023-11-06 22:08:24,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:08:24,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 85.0) internal successors, (510), 5 states have internal predecessors, (510), 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) Word has length 510 [2023-11-06 22:08:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:24,403 INFO L225 Difference]: With dead ends: 103495 [2023-11-06 22:08:24,404 INFO L226 Difference]: Without dead ends: 57304 [2023-11-06 22:08:24,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1023 GetRequests, 1011 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=83, Unknown=0, NotChecked=0, Total=156 [2023-11-06 22:08:24,423 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 1730 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1810 mSolverCounterSat, 2467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1730 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 4277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2467 IncrementalHoareTripleChecker+Valid, 1810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:24,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1730 Valid, 95 Invalid, 4277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2467 Valid, 1810 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-11-06 22:08:24,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57304 states. [2023-11-06 22:08:25,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57304 to 44996. [2023-11-06 22:08:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44996 states, 44995 states have (on average 1.127036337370819) internal successors, (50711), 44995 states have internal predecessors, (50711), 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 22:08:25,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44996 states to 44996 states and 50711 transitions. [2023-11-06 22:08:25,317 INFO L78 Accepts]: Start accepts. Automaton has 44996 states and 50711 transitions. Word has length 510 [2023-11-06 22:08:25,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:25,318 INFO L495 AbstractCegarLoop]: Abstraction has 44996 states and 50711 transitions. [2023-11-06 22:08:25,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.0) internal successors, (510), 5 states have internal predecessors, (510), 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 22:08:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 44996 states and 50711 transitions. [2023-11-06 22:08:25,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2023-11-06 22:08:25,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:25,325 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:08:25,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:25,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:08:25,533 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:25,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:25,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1290263051, now seen corresponding path program 1 times [2023-11-06 22:08:25,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:25,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429511905] [2023-11-06 22:08:25,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:25,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 493 proven. 39 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2023-11-06 22:08:26,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:26,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429511905] [2023-11-06 22:08:26,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429511905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:08:26,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328033235] [2023-11-06 22:08:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:26,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:26,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:26,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:26,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:08:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:26,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:08:26,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:26,766 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2023-11-06 22:08:26,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:08:26,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328033235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:08:26,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:08:26,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-06 22:08:26,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308469915] [2023-11-06 22:08:26,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:08:26,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:08:26,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:26,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:08:26,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:08:26,770 INFO L87 Difference]: Start difference. First operand 44996 states and 50711 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 22:08:29,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:29,457 INFO L93 Difference]: Finished difference Result 95668 states and 108162 transitions. [2023-11-06 22:08:29,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:08:29,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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) Word has length 528 [2023-11-06 22:08:29,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:29,522 INFO L225 Difference]: With dead ends: 95668 [2023-11-06 22:08:29,522 INFO L226 Difference]: Without dead ends: 50973 [2023-11-06 22:08:29,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 527 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:08:29,556 INFO L413 NwaCegarLoop]: 424 mSDtfsCounter, 372 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:29,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 443 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-06 22:08:29,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50973 states. [2023-11-06 22:08:30,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50973 to 49478. [2023-11-06 22:08:30,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49478 states, 49477 states have (on average 1.114922085009196) internal successors, (55163), 49477 states have internal predecessors, (55163), 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 22:08:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49478 states to 49478 states and 55163 transitions. [2023-11-06 22:08:30,678 INFO L78 Accepts]: Start accepts. Automaton has 49478 states and 55163 transitions. Word has length 528 [2023-11-06 22:08:30,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:30,679 INFO L495 AbstractCegarLoop]: Abstraction has 49478 states and 55163 transitions. [2023-11-06 22:08:30,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 22:08:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 49478 states and 55163 transitions. [2023-11-06 22:08:30,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2023-11-06 22:08:30,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:30,694 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:08:30,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:30,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:08:30,896 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:30,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:30,896 INFO L85 PathProgramCache]: Analyzing trace with hash -2016562453, now seen corresponding path program 1 times [2023-11-06 22:08:30,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:30,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636349347] [2023-11-06 22:08:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:30,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 640 proven. 39 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-11-06 22:08:31,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:31,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636349347] [2023-11-06 22:08:31,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636349347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:08:31,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690905182] [2023-11-06 22:08:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:31,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:31,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:31,710 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:31,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:08:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:31,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:08:31,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 504 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2023-11-06 22:08:32,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:08:32,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690905182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:08:32,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:08:32,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-06 22:08:32,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989951033] [2023-11-06 22:08:32,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:08:32,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:08:32,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:32,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:08:32,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:08:32,124 INFO L87 Difference]: Start difference. First operand 49478 states and 55163 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 22:08:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:35,178 INFO L93 Difference]: Finished difference Result 110013 states and 122747 transitions. [2023-11-06 22:08:35,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:08:35,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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) Word has length 602 [2023-11-06 22:08:35,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:35,241 INFO L225 Difference]: With dead ends: 110013 [2023-11-06 22:08:35,241 INFO L226 Difference]: Without dead ends: 60836 [2023-11-06 22:08:35,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:08:35,252 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 268 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:35,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 250 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-06 22:08:35,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60836 states. [2023-11-06 22:08:36,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60836 to 52461. [2023-11-06 22:08:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52461 states, 52460 states have (on average 1.1090926420129623) internal successors, (58183), 52460 states have internal predecessors, (58183), 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 22:08:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52461 states to 52461 states and 58183 transitions. [2023-11-06 22:08:36,210 INFO L78 Accepts]: Start accepts. Automaton has 52461 states and 58183 transitions. Word has length 602 [2023-11-06 22:08:36,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:36,211 INFO L495 AbstractCegarLoop]: Abstraction has 52461 states and 58183 transitions. [2023-11-06 22:08:36,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 22:08:36,211 INFO L276 IsEmpty]: Start isEmpty. Operand 52461 states and 58183 transitions. [2023-11-06 22:08:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2023-11-06 22:08:36,222 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:36,223 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:08:36,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:36,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:08:36,430 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:36,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:36,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1393730838, now seen corresponding path program 1 times [2023-11-06 22:08:36,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:36,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758646311] [2023-11-06 22:08:36,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:36,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 650 proven. 39 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2023-11-06 22:08:37,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:37,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758646311] [2023-11-06 22:08:37,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758646311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:08:37,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567043768] [2023-11-06 22:08:37,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:37,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:37,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:37,200 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:37,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:08:37,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:37,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:08:37,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 520 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2023-11-06 22:08:37,591 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:08:37,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567043768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:08:37,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:08:37,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-06 22:08:37,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704071934] [2023-11-06 22:08:37,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:08:37,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:08:37,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:37,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:08:37,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:08:37,595 INFO L87 Difference]: Start difference. First operand 52461 states and 58183 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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 22:08:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:08:40,292 INFO L93 Difference]: Finished difference Result 103420 states and 114744 transitions. [2023-11-06 22:08:40,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:08:40,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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) Word has length 607 [2023-11-06 22:08:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:08:40,338 INFO L225 Difference]: With dead ends: 103420 [2023-11-06 22:08:40,339 INFO L226 Difference]: Without dead ends: 51260 [2023-11-06 22:08:40,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:08:40,348 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 250 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:08:40,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 600 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-06 22:08:40,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51260 states. [2023-11-06 22:08:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51260 to 50063. [2023-11-06 22:08:41,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50063 states, 50062 states have (on average 1.0783628300906876) internal successors, (53985), 50062 states have internal predecessors, (53985), 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 22:08:41,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50063 states to 50063 states and 53985 transitions. [2023-11-06 22:08:41,109 INFO L78 Accepts]: Start accepts. Automaton has 50063 states and 53985 transitions. Word has length 607 [2023-11-06 22:08:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:08:41,109 INFO L495 AbstractCegarLoop]: Abstraction has 50063 states and 53985 transitions. [2023-11-06 22:08:41,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 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 22:08:41,110 INFO L276 IsEmpty]: Start isEmpty. Operand 50063 states and 53985 transitions. [2023-11-06 22:08:41,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2023-11-06 22:08:41,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:08:41,124 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:08:41,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:08:41,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:08:41,331 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:08:41,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:08:41,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1635363990, now seen corresponding path program 1 times [2023-11-06 22:08:41,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:08:41,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032458844] [2023-11-06 22:08:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:41,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:08:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:43,006 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 125 proven. 464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:43,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:08:43,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032458844] [2023-11-06 22:08:43,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032458844] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:08:43,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858360773] [2023-11-06 22:08:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:08:43,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:08:43,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:08:43,011 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:08:43,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:08:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:08:43,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:08:43,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:08:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 42 proven. 547 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:44,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:08:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 589 backedges. 589 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:08:49,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858360773] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:08:49,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:08:49,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2023-11-06 22:08:49,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136210597] [2023-11-06 22:08:49,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:08:49,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:08:49,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:08:49,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:08:49,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=98, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:08:49,908 INFO L87 Difference]: Start difference. First operand 50063 states and 53985 transitions. Second operand has 6 states, 6 states have (on average 114.16666666666667) internal successors, (685), 5 states have internal predecessors, (685), 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 22:08:56,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:08:59,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:01,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:03,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:05,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:08,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:10,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:12,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:14,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:16,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:18,406 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:20,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:22,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:24,743 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:26,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:28,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:30,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:33,037 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:35,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-11-06 22:09:35,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:09:35,879 INFO L93 Difference]: Finished difference Result 104040 states and 112100 transitions. [2023-11-06 22:09:35,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:09:35,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 114.16666666666667) internal successors, (685), 5 states have internal predecessors, (685), 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) Word has length 685 [2023-11-06 22:09:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:09:35,933 INFO L225 Difference]: With dead ends: 104040 [2023-11-06 22:09:35,933 INFO L226 Difference]: Without dead ends: 54278 [2023-11-06 22:09:35,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1373 GetRequests, 1361 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=98, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:09:35,950 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1059 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 2161 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 3926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2161 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:09:35,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1059 Valid, 88 Invalid, 3926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2161 Valid, 1746 Invalid, 19 Unknown, 0 Unchecked, 45.3s Time] [2023-11-06 22:09:35,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54278 states. [2023-11-06 22:09:36,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54278 to 49465. [2023-11-06 22:09:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49465 states, 49464 states have (on average 1.0776120006469352) internal successors, (53303), 49464 states have internal predecessors, (53303), 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 22:09:36,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49465 states to 49465 states and 53303 transitions. [2023-11-06 22:09:36,796 INFO L78 Accepts]: Start accepts. Automaton has 49465 states and 53303 transitions. Word has length 685 [2023-11-06 22:09:36,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:09:36,797 INFO L495 AbstractCegarLoop]: Abstraction has 49465 states and 53303 transitions. [2023-11-06 22:09:36,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 114.16666666666667) internal successors, (685), 5 states have internal predecessors, (685), 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 22:09:36,797 INFO L276 IsEmpty]: Start isEmpty. Operand 49465 states and 53303 transitions. [2023-11-06 22:09:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 805 [2023-11-06 22:09:36,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:09:36,819 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:36,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:37,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:09:37,021 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:09:37,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:37,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1706100167, now seen corresponding path program 1 times [2023-11-06 22:09:37,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:37,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25812255] [2023-11-06 22:09:37,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:37,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:37,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 644 proven. 0 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2023-11-06 22:09:37,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:37,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25812255] [2023-11-06 22:09:37,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25812255] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:37,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:37,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:09:37,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036435129] [2023-11-06 22:09:37,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:37,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:09:37,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:37,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:09:37,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:09:37,908 INFO L87 Difference]: Start difference. First operand 49465 states and 53303 transitions. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 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 22:09:40,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:09:40,971 INFO L93 Difference]: Finished difference Result 107609 states and 115811 transitions. [2023-11-06 22:09:40,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:09:40,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 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) Word has length 804 [2023-11-06 22:09:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:09:41,027 INFO L225 Difference]: With dead ends: 107609 [2023-11-06 22:09:41,027 INFO L226 Difference]: Without dead ends: 52764 [2023-11-06 22:09:41,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:09:41,043 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 141 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:09:41,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 661 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-06 22:09:41,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52764 states. [2023-11-06 22:09:41,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52764 to 48272. [2023-11-06 22:09:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48272 states, 48271 states have (on average 1.0615069089101117) internal successors, (51240), 48271 states have internal predecessors, (51240), 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 22:09:41,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48272 states to 48272 states and 51240 transitions. [2023-11-06 22:09:41,982 INFO L78 Accepts]: Start accepts. Automaton has 48272 states and 51240 transitions. Word has length 804 [2023-11-06 22:09:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:09:41,983 INFO L495 AbstractCegarLoop]: Abstraction has 48272 states and 51240 transitions. [2023-11-06 22:09:41,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 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 22:09:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 48272 states and 51240 transitions. [2023-11-06 22:09:42,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 825 [2023-11-06 22:09:42,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:09:42,014 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:42,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 22:09:42,015 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:09:42,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:42,015 INFO L85 PathProgramCache]: Analyzing trace with hash -432972242, now seen corresponding path program 1 times [2023-11-06 22:09:42,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:42,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909090008] [2023-11-06 22:09:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:42,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1700 backedges. 962 proven. 39 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2023-11-06 22:09:43,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:43,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909090008] [2023-11-06 22:09:43,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909090008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:09:43,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404035647] [2023-11-06 22:09:43,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:43,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:43,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:09:43,114 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:09:43,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:09:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:43,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 22:09:43,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:09:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1700 backedges. 962 proven. 39 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2023-11-06 22:09:44,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:09:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1700 backedges. 962 proven. 39 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2023-11-06 22:09:45,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404035647] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:09:45,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:09:45,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-06 22:09:45,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818888277] [2023-11-06 22:09:45,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:09:45,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:09:45,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:45,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:09:45,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:09:45,466 INFO L87 Difference]: Start difference. First operand 48272 states and 51240 transitions. Second operand has 9 states, 9 states have (on average 87.33333333333333) internal successors, (786), 8 states have internal predecessors, (786), 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 22:09:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:09:54,757 INFO L93 Difference]: Finished difference Result 104132 states and 110324 transitions. [2023-11-06 22:09:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:09:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 87.33333333333333) internal successors, (786), 8 states have internal predecessors, (786), 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) Word has length 824 [2023-11-06 22:09:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:09:54,811 INFO L225 Difference]: With dead ends: 104132 [2023-11-06 22:09:54,812 INFO L226 Difference]: Without dead ends: 39599 [2023-11-06 22:09:54,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1657 GetRequests, 1643 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:09:54,837 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 3106 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 5400 mSolverCounterSat, 520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3106 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 5920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 5400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:09:54,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3106 Valid, 226 Invalid, 5920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 5400 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2023-11-06 22:09:54,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39599 states. [2023-11-06 22:09:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39599 to 27616. [2023-11-06 22:09:55,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27616 states, 27615 states have (on average 1.032265073329712) internal successors, (28506), 27615 states have internal predecessors, (28506), 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 22:09:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27616 states to 27616 states and 28506 transitions. [2023-11-06 22:09:55,455 INFO L78 Accepts]: Start accepts. Automaton has 27616 states and 28506 transitions. Word has length 824 [2023-11-06 22:09:55,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:09:55,455 INFO L495 AbstractCegarLoop]: Abstraction has 27616 states and 28506 transitions. [2023-11-06 22:09:55,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 87.33333333333333) internal successors, (786), 8 states have internal predecessors, (786), 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 22:09:55,456 INFO L276 IsEmpty]: Start isEmpty. Operand 27616 states and 28506 transitions. [2023-11-06 22:09:55,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 854 [2023-11-06 22:09:55,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:09:55,470 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:55,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:09:55,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:09:55,675 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:09:55,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1540025798, now seen corresponding path program 1 times [2023-11-06 22:09:55,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:55,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230482933] [2023-11-06 22:09:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:55,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1343 backedges. 832 proven. 0 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2023-11-06 22:09:56,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:56,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230482933] [2023-11-06 22:09:56,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230482933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:56,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:56,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:09:56,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731223250] [2023-11-06 22:09:56,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:56,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:09:56,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:56,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:09:56,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:09:56,222 INFO L87 Difference]: Start difference. First operand 27616 states and 28506 transitions. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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 22:09:58,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:09:58,199 INFO L93 Difference]: Finished difference Result 55228 states and 57020 transitions. [2023-11-06 22:09:58,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:09:58,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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) Word has length 853 [2023-11-06 22:09:58,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:09:58,228 INFO L225 Difference]: With dead ends: 55228 [2023-11-06 22:09:58,228 INFO L226 Difference]: Without dead ends: 27913 [2023-11-06 22:09:58,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:09:58,240 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 435 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:09:58,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 68 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 22:09:58,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27913 states. [2023-11-06 22:09:58,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27913 to 27614. [2023-11-06 22:09:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27614 states, 27613 states have (on average 1.0321949806250679) internal successors, (28502), 27613 states have internal predecessors, (28502), 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 22:09:58,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27614 states to 27614 states and 28502 transitions. [2023-11-06 22:09:58,662 INFO L78 Accepts]: Start accepts. Automaton has 27614 states and 28502 transitions. Word has length 853 [2023-11-06 22:09:58,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:09:58,663 INFO L495 AbstractCegarLoop]: Abstraction has 27614 states and 28502 transitions. [2023-11-06 22:09:58,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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 22:09:58,663 INFO L276 IsEmpty]: Start isEmpty. Operand 27614 states and 28502 transitions. [2023-11-06 22:09:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2023-11-06 22:09:58,680 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:09:58,681 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:09:58,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-06 22:09:58,682 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:09:58,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:09:58,682 INFO L85 PathProgramCache]: Analyzing trace with hash -608480507, now seen corresponding path program 1 times [2023-11-06 22:09:58,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:09:58,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062070359] [2023-11-06 22:09:58,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:09:58,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:09:58,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:09:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 1056 proven. 0 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2023-11-06 22:09:59,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:09:59,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062070359] [2023-11-06 22:09:59,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062070359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:09:59,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:09:59,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:09:59,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000435326] [2023-11-06 22:09:59,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:09:59,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:09:59,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:09:59,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:09:59,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:09:59,543 INFO L87 Difference]: Start difference. First operand 27614 states and 28502 transitions. Second operand has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 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 22:10:02,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:02,565 INFO L93 Difference]: Finished difference Result 56124 states and 57954 transitions. [2023-11-06 22:10:02,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:10:02,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 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) Word has length 878 [2023-11-06 22:10:02,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:02,592 INFO L225 Difference]: With dead ends: 56124 [2023-11-06 22:10:02,592 INFO L226 Difference]: Without dead ends: 28811 [2023-11-06 22:10:02,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:10:02,601 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 576 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:02,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 430 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-06 22:10:02,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28811 states. [2023-11-06 22:10:02,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28811 to 27015. [2023-11-06 22:10:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27015 states, 27014 states have (on average 1.0269119715702968) internal successors, (27741), 27014 states have internal predecessors, (27741), 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 22:10:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27015 states to 27015 states and 27741 transitions. [2023-11-06 22:10:03,036 INFO L78 Accepts]: Start accepts. Automaton has 27015 states and 27741 transitions. Word has length 878 [2023-11-06 22:10:03,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:03,037 INFO L495 AbstractCegarLoop]: Abstraction has 27015 states and 27741 transitions. [2023-11-06 22:10:03,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.75) internal successors, (611), 4 states have internal predecessors, (611), 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 22:10:03,038 INFO L276 IsEmpty]: Start isEmpty. Operand 27015 states and 27741 transitions. [2023-11-06 22:10:03,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 936 [2023-11-06 22:10:03,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:03,063 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:03,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-06 22:10:03,064 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:03,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:03,065 INFO L85 PathProgramCache]: Analyzing trace with hash 891566358, now seen corresponding path program 1 times [2023-11-06 22:10:03,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:03,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238058923] [2023-11-06 22:10:03,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:03,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 911 proven. 0 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2023-11-06 22:10:03,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:03,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238058923] [2023-11-06 22:10:03,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238058923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:03,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:03,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:10:03,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770237081] [2023-11-06 22:10:03,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:03,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:10:03,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:10:03,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:10:03,613 INFO L87 Difference]: Start difference. First operand 27015 states and 27741 transitions. Second operand has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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 22:10:05,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:05,399 INFO L93 Difference]: Finished difference Result 54320 states and 55775 transitions. [2023-11-06 22:10:05,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:10:05,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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) Word has length 935 [2023-11-06 22:10:05,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:05,431 INFO L225 Difference]: With dead ends: 54320 [2023-11-06 22:10:05,431 INFO L226 Difference]: Without dead ends: 27606 [2023-11-06 22:10:05,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:10:05,444 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 340 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:05,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 457 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-06 22:10:05,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27606 states. [2023-11-06 22:10:05,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27606 to 22817. [2023-11-06 22:10:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22817 states, 22816 states have (on average 1.0238867461430574) internal successors, (23361), 22816 states have internal predecessors, (23361), 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 22:10:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22817 states to 22817 states and 23361 transitions. [2023-11-06 22:10:05,821 INFO L78 Accepts]: Start accepts. Automaton has 22817 states and 23361 transitions. Word has length 935 [2023-11-06 22:10:05,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:05,822 INFO L495 AbstractCegarLoop]: Abstraction has 22817 states and 23361 transitions. [2023-11-06 22:10:05,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.66666666666666) internal successors, (494), 3 states have internal predecessors, (494), 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 22:10:05,822 INFO L276 IsEmpty]: Start isEmpty. Operand 22817 states and 23361 transitions. [2023-11-06 22:10:05,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1125 [2023-11-06 22:10:05,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:05,914 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:05,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-06 22:10:05,914 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:05,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:05,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1609967201, now seen corresponding path program 1 times [2023-11-06 22:10:05,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:05,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514151539] [2023-11-06 22:10:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:05,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:06,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2226 backedges. 1416 proven. 0 refuted. 0 times theorem prover too weak. 810 trivial. 0 not checked. [2023-11-06 22:10:06,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:06,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514151539] [2023-11-06 22:10:06,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514151539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:10:06,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:10:06,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:10:06,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530864554] [2023-11-06 22:10:06,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:06,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:10:06,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:06,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:10:06,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:10:06,870 INFO L87 Difference]: Start difference. First operand 22817 states and 23361 transitions. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 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 22:10:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:08,410 INFO L93 Difference]: Finished difference Result 38720 states and 39644 transitions. [2023-11-06 22:10:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:10:08,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 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) Word has length 1124 [2023-11-06 22:10:08,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:08,427 INFO L225 Difference]: With dead ends: 38720 [2023-11-06 22:10:08,427 INFO L226 Difference]: Without dead ends: 16204 [2023-11-06 22:10:08,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:10:08,438 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 248 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:08,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 76 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 22:10:08,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16204 states. [2023-11-06 22:10:08,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16204 to 14400. [2023-11-06 22:10:08,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14400 states, 14399 states have (on average 1.022640461143135) internal successors, (14725), 14399 states have internal predecessors, (14725), 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 22:10:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14400 states to 14400 states and 14725 transitions. [2023-11-06 22:10:08,770 INFO L78 Accepts]: Start accepts. Automaton has 14400 states and 14725 transitions. Word has length 1124 [2023-11-06 22:10:08,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:08,771 INFO L495 AbstractCegarLoop]: Abstraction has 14400 states and 14725 transitions. [2023-11-06 22:10:08,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 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 22:10:08,771 INFO L276 IsEmpty]: Start isEmpty. Operand 14400 states and 14725 transitions. [2023-11-06 22:10:08,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1309 [2023-11-06 22:10:08,810 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:08,811 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:08,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-06 22:10:08,811 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:08,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash -865096868, now seen corresponding path program 1 times [2023-11-06 22:10:08,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:08,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721223597] [2023-11-06 22:10:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:08,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2903 backedges. 1843 proven. 329 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2023-11-06 22:10:11,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:11,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721223597] [2023-11-06 22:10:11,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721223597] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:11,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230522021] [2023-11-06 22:10:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:11,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:11,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:11,836 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:11,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:10:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:12,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:10:12,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:10:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2903 backedges. 1663 proven. 42 refuted. 0 times theorem prover too weak. 1198 trivial. 0 not checked. [2023-11-06 22:10:13,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:10:14,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2903 backedges. 1574 proven. 0 refuted. 0 times theorem prover too weak. 1329 trivial. 0 not checked. [2023-11-06 22:10:14,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230522021] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:14,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:10:14,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 12 [2023-11-06 22:10:14,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298869776] [2023-11-06 22:10:14,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:10:14,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 22:10:14,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:10:14,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 22:10:14,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:10:14,190 INFO L87 Difference]: Start difference. First operand 14400 states and 14725 transitions. Second operand has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 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 22:10:17,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:10:17,035 INFO L93 Difference]: Finished difference Result 15908 states and 16252 transitions. [2023-11-06 22:10:17,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 22:10:17,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 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) Word has length 1308 [2023-11-06 22:10:17,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:10:17,056 INFO L225 Difference]: With dead ends: 15908 [2023-11-06 22:10:17,056 INFO L226 Difference]: Without dead ends: 15607 [2023-11-06 22:10:17,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2620 GetRequests, 2610 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:10:17,061 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 794 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:10:17,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 50 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1398 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-06 22:10:17,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15607 states. [2023-11-06 22:10:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15607 to 14101. [2023-11-06 22:10:17,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14101 states, 14100 states have (on average 1.022482269503546) internal successors, (14417), 14100 states have internal predecessors, (14417), 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 22:10:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14101 states to 14101 states and 14417 transitions. [2023-11-06 22:10:17,437 INFO L78 Accepts]: Start accepts. Automaton has 14101 states and 14417 transitions. Word has length 1308 [2023-11-06 22:10:17,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:10:17,439 INFO L495 AbstractCegarLoop]: Abstraction has 14101 states and 14417 transitions. [2023-11-06 22:10:17,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 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 22:10:17,439 INFO L276 IsEmpty]: Start isEmpty. Operand 14101 states and 14417 transitions. [2023-11-06 22:10:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1360 [2023-11-06 22:10:17,482 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:10:17,483 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:10:17,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:10:17,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:17,684 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:10:17,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:10:17,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2081669835, now seen corresponding path program 1 times [2023-11-06 22:10:17,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:10:17,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984196662] [2023-11-06 22:10:17,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:17,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:10:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3132 backedges. 2047 proven. 354 refuted. 0 times theorem prover too weak. 731 trivial. 0 not checked. [2023-11-06 22:10:20,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:10:20,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984196662] [2023-11-06 22:10:20,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984196662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:10:20,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521847606] [2023-11-06 22:10:20,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:10:20,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:10:20,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:10:20,890 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:10:20,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f43ffad6-df23-40f3-90a2-ddb9edb80734/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:10:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:10:21,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 1535 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:10:21,506 INFO L285 TraceCheckSpWp]: Computing forward predicates...