./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label46.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label46.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 541e7f2d0384c0fe15c71d37dc3b6d915f82dde67f224d182d5f6431c66d5181 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:40:51,815 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:40:51,934 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:40:51,943 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:40:51,944 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:40:51,985 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:40:51,986 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:40:51,986 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:40:51,988 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:40:51,993 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:40:51,994 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:40:51,995 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:40:51,995 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:40:51,997 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:40:51,998 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:40:51,998 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:40:51,999 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:40:51,999 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:40:52,000 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:40:52,001 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:40:52,002 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:40:52,004 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:40:52,005 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:40:52,005 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:40:52,006 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:40:52,006 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:40:52,007 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:40:52,008 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:40:52,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:52,009 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:40:52,010 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:40:52,010 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:40:52,011 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:40:52,011 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:40:52,011 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:40:52,012 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:40:52,012 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:40:52,012 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:40:52,013 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:40:52,013 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_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 541e7f2d0384c0fe15c71d37dc3b6d915f82dde67f224d182d5f6431c66d5181 [2023-11-19 07:40:52,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:40:52,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:40:52,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:40:52,390 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:40:52,391 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:40:52,392 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/eca-rers2012/Problem03_label46.c [2023-11-19 07:40:55,579 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:40:56,014 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:40:56,015 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/sv-benchmarks/c/eca-rers2012/Problem03_label46.c [2023-11-19 07:40:56,034 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/data/c57388556/37311ad785034f70831d1b290ca951a0/FLAG0aa837a94 [2023-11-19 07:40:56,049 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/data/c57388556/37311ad785034f70831d1b290ca951a0 [2023-11-19 07:40:56,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:40:56,054 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:40:56,056 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:56,056 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:40:56,062 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:40:56,063 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:56" (1/1) ... [2023-11-19 07:40:56,064 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b7809d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:56, skipping insertion in model container [2023-11-19 07:40:56,065 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:40:56" (1/1) ... [2023-11-19 07:40:56,144 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:40:56,811 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_44a06cfa-65f4-4021-b099-f66824b12abf/sv-benchmarks/c/eca-rers2012/Problem03_label46.c[59207,59220] [2023-11-19 07:40:56,851 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:56,867 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:40:57,243 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_44a06cfa-65f4-4021-b099-f66824b12abf/sv-benchmarks/c/eca-rers2012/Problem03_label46.c[59207,59220] [2023-11-19 07:40:57,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:40:57,279 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:40:57,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:57 WrapperNode [2023-11-19 07:40:57,280 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:40:57,282 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:57,282 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:40:57,282 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:40:57,292 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:57" (1/1) ... [2023-11-19 07:40:57,348 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:57" (1/1) ... [2023-11-19 07:40:57,454 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1772 [2023-11-19 07:40:57,455 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:40:57,455 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:40:57,456 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:40:57,456 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:40:57,466 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:57" (1/1) ... [2023-11-19 07:40:57,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:57" (1/1) ... [2023-11-19 07:40:57,474 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:57" (1/1) ... [2023-11-19 07:40:57,475 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:57" (1/1) ... [2023-11-19 07:40:57,586 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:57" (1/1) ... [2023-11-19 07:40:57,612 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:57" (1/1) ... [2023-11-19 07:40:57,643 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:57" (1/1) ... [2023-11-19 07:40:57,649 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:57" (1/1) ... [2023-11-19 07:40:57,663 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:40:57,664 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:40:57,664 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:40:57,664 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:40:57,665 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:57" (1/1) ... [2023-11-19 07:40:57,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:40:57,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:40:57,700 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:40:57,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:40:57,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:40:57,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:40:57,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:40:57,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:40:57,927 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:40:57,929 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:41:00,141 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:41:00,156 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:41:00,156 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:41:00,163 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:00 BoogieIcfgContainer [2023-11-19 07:41:00,163 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:41:00,166 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:41:00,166 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:41:00,170 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:41:00,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:40:56" (1/3) ... [2023-11-19 07:41:00,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ccc1628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:00, skipping insertion in model container [2023-11-19 07:41:00,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:40:57" (2/3) ... [2023-11-19 07:41:00,172 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ccc1628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:41:00, skipping insertion in model container [2023-11-19 07:41:00,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:41:00" (3/3) ... [2023-11-19 07:41:00,174 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label46.c [2023-11-19 07:41:00,197 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:41:00,197 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:41:00,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:41:00,270 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=LoopHeads, 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;@5701bd0b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:41:00,271 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:41:00,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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) [2023-11-19 07:41:00,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-11-19 07:41:00,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:00,299 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:00,300 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:00,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:00,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1730728613, now seen corresponding path program 1 times [2023-11-19 07:41:00,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:00,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020033135] [2023-11-19 07:41:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:00,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:01,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:01,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:01,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020033135] [2023-11-19 07:41:01,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020033135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:01,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:01,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:01,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914500505] [2023-11-19 07:41:01,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:01,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:01,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:01,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:01,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:01,682 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 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) [2023-11-19 07:41:03,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:03,221 INFO L93 Difference]: Finished difference Result 835 states and 1478 transitions. [2023-11-19 07:41:03,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:03,224 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 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 185 [2023-11-19 07:41:03,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:03,245 INFO L225 Difference]: With dead ends: 835 [2023-11-19 07:41:03,245 INFO L226 Difference]: Without dead ends: 456 [2023-11-19 07:41:03,251 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 [2023-11-19 07:41:03,256 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 103 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:03,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 161 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-19 07:41:03,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2023-11-19 07:41:03,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 451. [2023-11-19 07:41:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5622222222222222) internal successors, (703), 450 states have internal predecessors, (703), 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) [2023-11-19 07:41:03,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 703 transitions. [2023-11-19 07:41:03,338 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 703 transitions. Word has length 185 [2023-11-19 07:41:03,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:03,339 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 703 transitions. [2023-11-19 07:41:03,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 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) [2023-11-19 07:41:03,340 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 703 transitions. [2023-11-19 07:41:03,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-11-19 07:41:03,346 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:03,347 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 07:41:03,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:41:03,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:03,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:03,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1408358515, now seen corresponding path program 1 times [2023-11-19 07:41:03,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:03,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21156329] [2023-11-19 07:41:03,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:03,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:03,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:03,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21156329] [2023-11-19 07:41:03,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21156329] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:03,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:03,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:03,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774834571] [2023-11-19 07:41:03,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:03,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:03,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:03,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:03,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:03,918 INFO L87 Difference]: Start difference. First operand 451 states and 703 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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) [2023-11-19 07:41:05,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:05,071 INFO L93 Difference]: Finished difference Result 1340 states and 2094 transitions. [2023-11-19 07:41:05,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:05,072 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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 191 [2023-11-19 07:41:05,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:05,079 INFO L225 Difference]: With dead ends: 1340 [2023-11-19 07:41:05,079 INFO L226 Difference]: Without dead ends: 891 [2023-11-19 07:41:05,082 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 [2023-11-19 07:41:05,084 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:05,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 154 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:41:05,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2023-11-19 07:41:05,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 887. [2023-11-19 07:41:05,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 1.5474040632054176) internal successors, (1371), 886 states have internal predecessors, (1371), 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) [2023-11-19 07:41:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1371 transitions. [2023-11-19 07:41:05,142 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1371 transitions. Word has length 191 [2023-11-19 07:41:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:05,143 INFO L495 AbstractCegarLoop]: Abstraction has 887 states and 1371 transitions. [2023-11-19 07:41:05,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 2 states have internal predecessors, (191), 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) [2023-11-19 07:41:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1371 transitions. [2023-11-19 07:41:05,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2023-11-19 07:41:05,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:05,149 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-19 07:41:05,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:41:05,150 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:05,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:05,151 INFO L85 PathProgramCache]: Analyzing trace with hash 567972033, now seen corresponding path program 1 times [2023-11-19 07:41:05,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:05,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641377806] [2023-11-19 07:41:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:05,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:05,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:05,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:05,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641377806] [2023-11-19 07:41:05,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641377806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:05,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:05,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:05,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453483593] [2023-11-19 07:41:05,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:05,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:05,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:05,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:05,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:05,716 INFO L87 Difference]: Start difference. First operand 887 states and 1371 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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) [2023-11-19 07:41:06,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:06,891 INFO L93 Difference]: Finished difference Result 2612 states and 4042 transitions. [2023-11-19 07:41:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:06,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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 195 [2023-11-19 07:41:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:06,904 INFO L225 Difference]: With dead ends: 2612 [2023-11-19 07:41:06,904 INFO L226 Difference]: Without dead ends: 1727 [2023-11-19 07:41:06,911 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 [2023-11-19 07:41:06,915 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 234 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:06,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 114 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:41:06,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1727 states. [2023-11-19 07:41:06,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1727 to 1725. [2023-11-19 07:41:06,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.4715777262180973) internal successors, (2537), 1724 states have internal predecessors, (2537), 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) [2023-11-19 07:41:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 2537 transitions. [2023-11-19 07:41:06,982 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 2537 transitions. Word has length 195 [2023-11-19 07:41:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:06,985 INFO L495 AbstractCegarLoop]: Abstraction has 1725 states and 2537 transitions. [2023-11-19 07:41:06,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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) [2023-11-19 07:41:06,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 2537 transitions. [2023-11-19 07:41:06,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2023-11-19 07:41:06,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:06,997 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:06,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:41:06,997 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:07,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:07,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1214228354, now seen corresponding path program 1 times [2023-11-19 07:41:07,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:07,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808569204] [2023-11-19 07:41:07,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:07,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:07,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:07,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808569204] [2023-11-19 07:41:07,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808569204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:07,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:07,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:41:07,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748158710] [2023-11-19 07:41:07,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:07,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:07,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:07,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:07,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:07,312 INFO L87 Difference]: Start difference. First operand 1725 states and 2537 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2023-11-19 07:41:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:08,301 INFO L93 Difference]: Finished difference Result 5091 states and 7490 transitions. [2023-11-19 07:41:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:08,302 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 198 [2023-11-19 07:41:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:08,324 INFO L225 Difference]: With dead ends: 5091 [2023-11-19 07:41:08,324 INFO L226 Difference]: Without dead ends: 3368 [2023-11-19 07:41:08,327 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 [2023-11-19 07:41:08,339 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 250 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:08,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 157 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:41:08,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2023-11-19 07:41:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 3366. [2023-11-19 07:41:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 1.4050520059435363) internal successors, (4728), 3365 states have internal predecessors, (4728), 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) [2023-11-19 07:41:08,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4728 transitions. [2023-11-19 07:41:08,456 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4728 transitions. Word has length 198 [2023-11-19 07:41:08,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:08,456 INFO L495 AbstractCegarLoop]: Abstraction has 3366 states and 4728 transitions. [2023-11-19 07:41:08,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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) [2023-11-19 07:41:08,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4728 transitions. [2023-11-19 07:41:08,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-11-19 07:41:08,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:08,469 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:08,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:41:08,469 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:08,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:08,470 INFO L85 PathProgramCache]: Analyzing trace with hash 497552120, now seen corresponding path program 1 times [2023-11-19 07:41:08,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:08,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410283471] [2023-11-19 07:41:08,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:08,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:08,963 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-19 07:41:08,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:08,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410283471] [2023-11-19 07:41:08,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410283471] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:08,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:08,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:08,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99298764] [2023-11-19 07:41:08,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:08,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:08,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:08,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:08,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:08,969 INFO L87 Difference]: Start difference. First operand 3366 states and 4728 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 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) [2023-11-19 07:41:10,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:10,145 INFO L93 Difference]: Finished difference Result 9999 states and 14055 transitions. [2023-11-19 07:41:10,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:10,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 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 218 [2023-11-19 07:41:10,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:10,186 INFO L225 Difference]: With dead ends: 9999 [2023-11-19 07:41:10,186 INFO L226 Difference]: Without dead ends: 6635 [2023-11-19 07:41:10,192 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 [2023-11-19 07:41:10,195 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 235 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:10,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 133 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:41:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6635 states. [2023-11-19 07:41:10,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6635 to 6626. [2023-11-19 07:41:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6626 states, 6625 states have (on average 1.3542641509433961) internal successors, (8972), 6625 states have internal predecessors, (8972), 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) [2023-11-19 07:41:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6626 states to 6626 states and 8972 transitions. [2023-11-19 07:41:10,392 INFO L78 Accepts]: Start accepts. Automaton has 6626 states and 8972 transitions. Word has length 218 [2023-11-19 07:41:10,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:10,392 INFO L495 AbstractCegarLoop]: Abstraction has 6626 states and 8972 transitions. [2023-11-19 07:41:10,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 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) [2023-11-19 07:41:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 6626 states and 8972 transitions. [2023-11-19 07:41:10,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2023-11-19 07:41:10,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:10,412 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 07:41:10,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:41:10,412 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:10,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:10,414 INFO L85 PathProgramCache]: Analyzing trace with hash 404178270, now seen corresponding path program 1 times [2023-11-19 07:41:10,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:10,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9517802] [2023-11-19 07:41:10,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:10,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-19 07:41:10,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:10,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9517802] [2023-11-19 07:41:10,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9517802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:10,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155427529] [2023-11-19 07:41:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:10,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:10,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:10,939 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:10,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:41:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:11,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:41:11,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 07:41:11,336 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:41:11,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155427529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:11,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:41:11,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-19 07:41:11,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462425126] [2023-11-19 07:41:11,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:11,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:11,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:11,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:11,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:41:11,345 INFO L87 Difference]: Start difference. First operand 6626 states and 8972 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 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) [2023-11-19 07:41:11,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:11,762 INFO L93 Difference]: Finished difference Result 19869 states and 26907 transitions. [2023-11-19 07:41:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:11,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 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 223 [2023-11-19 07:41:11,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:11,866 INFO L225 Difference]: With dead ends: 19869 [2023-11-19 07:41:11,866 INFO L226 Difference]: Without dead ends: 13245 [2023-11-19 07:41:11,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:41:11,987 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 356 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:11,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 617 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:41:12,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13245 states. [2023-11-19 07:41:12,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13245 to 11594. [2023-11-19 07:41:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11594 states, 11593 states have (on average 1.3599585957043043) internal successors, (15766), 11593 states have internal predecessors, (15766), 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) [2023-11-19 07:41:12,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11594 states to 11594 states and 15766 transitions. [2023-11-19 07:41:12,321 INFO L78 Accepts]: Start accepts. Automaton has 11594 states and 15766 transitions. Word has length 223 [2023-11-19 07:41:12,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:12,322 INFO L495 AbstractCegarLoop]: Abstraction has 11594 states and 15766 transitions. [2023-11-19 07:41:12,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 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) [2023-11-19 07:41:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 11594 states and 15766 transitions. [2023-11-19 07:41:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-11-19 07:41:12,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:12,352 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:12,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:41:12,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:41:12,576 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:12,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:12,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1883887689, now seen corresponding path program 1 times [2023-11-19 07:41:12,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:12,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080827033] [2023-11-19 07:41:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:12,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:12,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:41:13,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:13,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080827033] [2023-11-19 07:41:13,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080827033] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:13,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281872669] [2023-11-19 07:41:13,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:13,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:13,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:13,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:13,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:41:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:13,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:41:13,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:41:13,931 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:41:13,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281872669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:13,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:41:13,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-19 07:41:13,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276876412] [2023-11-19 07:41:13,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:13,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:13,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:13,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:13,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:41:13,936 INFO L87 Difference]: Start difference. First operand 11594 states and 15766 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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) [2023-11-19 07:41:15,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:15,305 INFO L93 Difference]: Finished difference Result 32938 states and 44853 transitions. [2023-11-19 07:41:15,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:15,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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 229 [2023-11-19 07:41:15,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:15,354 INFO L225 Difference]: With dead ends: 32938 [2023-11-19 07:41:15,354 INFO L226 Difference]: Without dead ends: 21346 [2023-11-19 07:41:15,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:41:15,373 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 55 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:15,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 418 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 07:41:15,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21346 states. [2023-11-19 07:41:15,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21346 to 20729. [2023-11-19 07:41:15,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20729 states, 20728 states have (on average 1.235478579698958) internal successors, (25609), 20728 states have internal predecessors, (25609), 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) [2023-11-19 07:41:15,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20729 states to 20729 states and 25609 transitions. [2023-11-19 07:41:15,885 INFO L78 Accepts]: Start accepts. Automaton has 20729 states and 25609 transitions. Word has length 229 [2023-11-19 07:41:15,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:15,886 INFO L495 AbstractCegarLoop]: Abstraction has 20729 states and 25609 transitions. [2023-11-19 07:41:15,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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) [2023-11-19 07:41:15,887 INFO L276 IsEmpty]: Start isEmpty. Operand 20729 states and 25609 transitions. [2023-11-19 07:41:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2023-11-19 07:41:15,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:15,927 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:15,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:16,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:41:16,144 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:16,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:16,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1246639075, now seen corresponding path program 1 times [2023-11-19 07:41:16,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:16,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478093211] [2023-11-19 07:41:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:16,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:41:16,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:16,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478093211] [2023-11-19 07:41:16,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478093211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:16,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:16,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:41:16,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022003908] [2023-11-19 07:41:16,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:16,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:16,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:16,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:16,400 INFO L87 Difference]: Start difference. First operand 20729 states and 25609 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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) [2023-11-19 07:41:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:17,140 INFO L93 Difference]: Finished difference Result 40743 states and 50304 transitions. [2023-11-19 07:41:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:17,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 246 [2023-11-19 07:41:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:17,180 INFO L225 Difference]: With dead ends: 40743 [2023-11-19 07:41:17,180 INFO L226 Difference]: Without dead ends: 20016 [2023-11-19 07:41:17,199 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 [2023-11-19 07:41:17,201 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:17,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 07:41:17,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20016 states. [2023-11-19 07:41:17,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20016 to 19610. [2023-11-19 07:41:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19610 states, 19609 states have (on average 1.216125248610332) internal successors, (23847), 19609 states have internal predecessors, (23847), 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) [2023-11-19 07:41:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19610 states to 19610 states and 23847 transitions. [2023-11-19 07:41:17,560 INFO L78 Accepts]: Start accepts. Automaton has 19610 states and 23847 transitions. Word has length 246 [2023-11-19 07:41:17,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:17,560 INFO L495 AbstractCegarLoop]: Abstraction has 19610 states and 23847 transitions. [2023-11-19 07:41:17,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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) [2023-11-19 07:41:17,561 INFO L276 IsEmpty]: Start isEmpty. Operand 19610 states and 23847 transitions. [2023-11-19 07:41:17,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-11-19 07:41:17,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:17,603 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-19 07:41:17,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 07:41:17,603 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:17,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:17,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1351586102, now seen corresponding path program 1 times [2023-11-19 07:41:17,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:17,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421211708] [2023-11-19 07:41:17,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:17,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-19 07:41:18,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:18,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421211708] [2023-11-19 07:41:18,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421211708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:18,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:18,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:18,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875094578] [2023-11-19 07:41:18,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:18,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:18,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:18,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:18,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:18,244 INFO L87 Difference]: Start difference. First operand 19610 states and 23847 transitions. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 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) [2023-11-19 07:41:19,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:19,401 INFO L93 Difference]: Finished difference Result 44318 states and 53812 transitions. [2023-11-19 07:41:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:19,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 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 263 [2023-11-19 07:41:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:19,449 INFO L225 Difference]: With dead ends: 44318 [2023-11-19 07:41:19,449 INFO L226 Difference]: Without dead ends: 24710 [2023-11-19 07:41:19,469 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 [2023-11-19 07:41:19,470 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 224 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:19,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 118 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 07:41:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24710 states. [2023-11-19 07:41:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24710 to 24703. [2023-11-19 07:41:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24703 states, 24702 states have (on average 1.2094972067039107) internal successors, (29877), 24702 states have internal predecessors, (29877), 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) [2023-11-19 07:41:20,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24703 states to 24703 states and 29877 transitions. [2023-11-19 07:41:20,017 INFO L78 Accepts]: Start accepts. Automaton has 24703 states and 29877 transitions. Word has length 263 [2023-11-19 07:41:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:20,018 INFO L495 AbstractCegarLoop]: Abstraction has 24703 states and 29877 transitions. [2023-11-19 07:41:20,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 2 states have internal predecessors, (224), 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) [2023-11-19 07:41:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 24703 states and 29877 transitions. [2023-11-19 07:41:20,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-11-19 07:41:20,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:20,064 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-19 07:41:20,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:41:20,064 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:20,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:20,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2060308471, now seen corresponding path program 1 times [2023-11-19 07:41:20,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:20,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174994333] [2023-11-19 07:41:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:20,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:20,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:20,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174994333] [2023-11-19 07:41:20,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174994333] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:20,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:20,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:20,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689381647] [2023-11-19 07:41:20,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:20,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:20,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:20,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:20,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:20,677 INFO L87 Difference]: Start difference. First operand 24703 states and 29877 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 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) [2023-11-19 07:41:21,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:21,906 INFO L93 Difference]: Finished difference Result 56304 states and 69149 transitions. [2023-11-19 07:41:21,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:21,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 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 275 [2023-11-19 07:41:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:21,962 INFO L225 Difference]: With dead ends: 56304 [2023-11-19 07:41:21,962 INFO L226 Difference]: Without dead ends: 31603 [2023-11-19 07:41:21,977 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 [2023-11-19 07:41:21,978 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 127 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:21,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 148 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 07:41:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31603 states. [2023-11-19 07:41:22,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31603 to 30182. [2023-11-19 07:41:22,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30182 states, 30181 states have (on average 1.1791193134753652) internal successors, (35587), 30181 states have internal predecessors, (35587), 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) [2023-11-19 07:41:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30182 states to 30182 states and 35587 transitions. [2023-11-19 07:41:22,449 INFO L78 Accepts]: Start accepts. Automaton has 30182 states and 35587 transitions. Word has length 275 [2023-11-19 07:41:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:22,450 INFO L495 AbstractCegarLoop]: Abstraction has 30182 states and 35587 transitions. [2023-11-19 07:41:22,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 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) [2023-11-19 07:41:22,451 INFO L276 IsEmpty]: Start isEmpty. Operand 30182 states and 35587 transitions. [2023-11-19 07:41:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2023-11-19 07:41:22,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:22,476 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-19 07:41:22,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:41:22,477 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:22,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:22,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1907909627, now seen corresponding path program 1 times [2023-11-19 07:41:22,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:22,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255612786] [2023-11-19 07:41:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:22,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:22,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2023-11-19 07:41:23,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:23,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255612786] [2023-11-19 07:41:23,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255612786] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:23,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:23,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:41:23,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353494719] [2023-11-19 07:41:23,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:23,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:23,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:23,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:23,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:23,107 INFO L87 Difference]: Start difference. First operand 30182 states and 35587 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) [2023-11-19 07:41:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:24,241 INFO L93 Difference]: Finished difference Result 69138 states and 82164 transitions. [2023-11-19 07:41:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:24,242 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 317 [2023-11-19 07:41:24,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:24,309 INFO L225 Difference]: With dead ends: 69138 [2023-11-19 07:41:24,310 INFO L226 Difference]: Without dead ends: 43237 [2023-11-19 07:41:24,329 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 [2023-11-19 07:41:24,330 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 160 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:24,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 153 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:41:24,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43237 states. [2023-11-19 07:41:25,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43237 to 39337. [2023-11-19 07:41:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39337 states, 39336 states have (on average 1.1970205409802726) internal successors, (47086), 39336 states have internal predecessors, (47086), 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) [2023-11-19 07:41:25,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39337 states to 39337 states and 47086 transitions. [2023-11-19 07:41:25,123 INFO L78 Accepts]: Start accepts. Automaton has 39337 states and 47086 transitions. Word has length 317 [2023-11-19 07:41:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:25,124 INFO L495 AbstractCegarLoop]: Abstraction has 39337 states and 47086 transitions. [2023-11-19 07:41:25,124 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) [2023-11-19 07:41:25,124 INFO L276 IsEmpty]: Start isEmpty. Operand 39337 states and 47086 transitions. [2023-11-19 07:41:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2023-11-19 07:41:25,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:25,165 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-19 07:41:25,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:41:25,166 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:25,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:25,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1371667299, now seen corresponding path program 1 times [2023-11-19 07:41:25,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:25,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036894220] [2023-11-19 07:41:25,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:25,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:41:26,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:26,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036894220] [2023-11-19 07:41:26,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036894220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:26,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:26,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:41:26,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936172517] [2023-11-19 07:41:26,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:26,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:26,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:26,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:26,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:41:26,158 INFO L87 Difference]: Start difference. First operand 39337 states and 47086 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) [2023-11-19 07:41:27,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:27,626 INFO L93 Difference]: Finished difference Result 91288 states and 108908 transitions. [2023-11-19 07:41:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:27,626 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 321 [2023-11-19 07:41:27,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:27,697 INFO L225 Difference]: With dead ends: 91288 [2023-11-19 07:41:27,698 INFO L226 Difference]: Without dead ends: 52564 [2023-11-19 07:41:27,717 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 [2023-11-19 07:41:27,717 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 208 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:27,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 378 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 07:41:27,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52564 states. [2023-11-19 07:41:28,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52564 to 52554. [2023-11-19 07:41:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52554 states, 52553 states have (on average 1.1587159629326584) internal successors, (60894), 52553 states have internal predecessors, (60894), 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) [2023-11-19 07:41:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52554 states to 52554 states and 60894 transitions. [2023-11-19 07:41:28,658 INFO L78 Accepts]: Start accepts. Automaton has 52554 states and 60894 transitions. Word has length 321 [2023-11-19 07:41:28,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:28,658 INFO L495 AbstractCegarLoop]: Abstraction has 52554 states and 60894 transitions. [2023-11-19 07:41:28,658 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) [2023-11-19 07:41:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 52554 states and 60894 transitions. [2023-11-19 07:41:28,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-11-19 07:41:28,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:28,721 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-19 07:41:28,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:41:28,721 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:28,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:28,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2120284311, now seen corresponding path program 1 times [2023-11-19 07:41:28,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:28,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656092231] [2023-11-19 07:41:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:28,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 154 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:41:29,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:29,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656092231] [2023-11-19 07:41:29,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656092231] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:29,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353173254] [2023-11-19 07:41:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:29,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:29,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:29,777 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:29,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:41:30,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:30,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:41:30,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:41:30,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:41:30,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353173254] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:30,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:41:30,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-11-19 07:41:30,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931859670] [2023-11-19 07:41:30,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:30,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:30,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:30,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:30,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:41:30,305 INFO L87 Difference]: Start difference. First operand 52554 states and 60894 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 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) [2023-11-19 07:41:31,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:31,590 INFO L93 Difference]: Finished difference Result 104299 states and 120883 transitions. [2023-11-19 07:41:31,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:41:31,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 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 338 [2023-11-19 07:41:31,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:31,664 INFO L225 Difference]: With dead ends: 104299 [2023-11-19 07:41:31,665 INFO L226 Difference]: Without dead ends: 51950 [2023-11-19 07:41:31,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:41:31,683 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 77 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:31,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 290 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:41:31,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51950 states. [2023-11-19 07:41:32,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51950 to 50723. [2023-11-19 07:41:32,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50723 states, 50722 states have (on average 1.142561413193486) internal successors, (57953), 50722 states have internal predecessors, (57953), 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) [2023-11-19 07:41:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50723 states to 50723 states and 57953 transitions. [2023-11-19 07:41:32,780 INFO L78 Accepts]: Start accepts. Automaton has 50723 states and 57953 transitions. Word has length 338 [2023-11-19 07:41:32,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:32,781 INFO L495 AbstractCegarLoop]: Abstraction has 50723 states and 57953 transitions. [2023-11-19 07:41:32,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 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) [2023-11-19 07:41:32,781 INFO L276 IsEmpty]: Start isEmpty. Operand 50723 states and 57953 transitions. [2023-11-19 07:41:32,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-19 07:41:32,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:32,807 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-19 07:41:32,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:41:33,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:41:33,009 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:33,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:33,009 INFO L85 PathProgramCache]: Analyzing trace with hash -814585628, now seen corresponding path program 1 times [2023-11-19 07:41:33,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:33,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507399023] [2023-11-19 07:41:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:33,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-19 07:41:33,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:33,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507399023] [2023-11-19 07:41:33,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507399023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:33,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:41:33,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:41:33,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288197822] [2023-11-19 07:41:33,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:33,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:41:33,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:33,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:41:33,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:41:33,595 INFO L87 Difference]: Start difference. First operand 50723 states and 57953 transitions. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 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) [2023-11-19 07:41:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:41:35,380 INFO L93 Difference]: Finished difference Result 126665 states and 144997 transitions. [2023-11-19 07:41:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:41:35,380 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 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 344 [2023-11-19 07:41:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:41:35,468 INFO L225 Difference]: With dead ends: 126665 [2023-11-19 07:41:35,468 INFO L226 Difference]: Without dead ends: 78186 [2023-11-19 07:41:35,486 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 [2023-11-19 07:41:35,487 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 340 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:41:35,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 87 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 07:41:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78186 states. [2023-11-19 07:41:36,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78186 to 70842. [2023-11-19 07:41:36,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70842 states, 70841 states have (on average 1.1387896839400913) internal successors, (80673), 70841 states have internal predecessors, (80673), 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) [2023-11-19 07:41:36,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70842 states to 70842 states and 80673 transitions. [2023-11-19 07:41:36,998 INFO L78 Accepts]: Start accepts. Automaton has 70842 states and 80673 transitions. Word has length 344 [2023-11-19 07:41:36,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:41:36,998 INFO L495 AbstractCegarLoop]: Abstraction has 70842 states and 80673 transitions. [2023-11-19 07:41:36,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 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) [2023-11-19 07:41:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 70842 states and 80673 transitions. [2023-11-19 07:41:37,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2023-11-19 07:41:37,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:41:37,057 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:41:37,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:41:37,057 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:41:37,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:41:37,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1104087719, now seen corresponding path program 1 times [2023-11-19 07:41:37,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:41:37,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288726966] [2023-11-19 07:41:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:37,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:41:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 252 proven. 6 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2023-11-19 07:41:37,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:41:37,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288726966] [2023-11-19 07:41:37,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288726966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:41:37,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302289826] [2023-11-19 07:41:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:41:37,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:41:37,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:41:37,865 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:41:37,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44a06cfa-65f4-4021-b099-f66824b12abf/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:41:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:41:38,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:41:38,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:41:38,489 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-11-19 07:41:38,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:41:38,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302289826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:41:38,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:41:38,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-19 07:41:38,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610528555] [2023-11-19 07:41:38,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:41:38,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:41:38,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:41:38,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:41:38,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:41:38,493 INFO L87 Difference]: Start difference. First operand 70842 states and 80673 transitions. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 2 states have internal predecessors, (311), 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)