./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl --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 89d9992650be4fcd4025f7007fb14b6b521ee1b4b929549cdf6651f6eed1ab75 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:17:54,030 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:17:54,152 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:17:54,168 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:17:54,169 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:17:54,211 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:17:54,211 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:17:54,212 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:17:54,213 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:17:54,218 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:17:54,219 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:17:54,219 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:17:54,220 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:17:54,222 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:17:54,222 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:17:54,223 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:17:54,223 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:17:54,224 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:17:54,224 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:17:54,225 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:17:54,225 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:17:54,226 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:17:54,226 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:17:54,228 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:17:54,229 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:17:54,230 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:17:54,230 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:17:54,230 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:17:54,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:17:54,231 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:17:54,233 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:17:54,233 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:17:54,233 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:17:54,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:17:54,234 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:17:54,234 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:17:54,234 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:17:54,234 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:17:54,235 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:17:54,235 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_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89d9992650be4fcd4025f7007fb14b6b521ee1b4b929549cdf6651f6eed1ab75 [2023-11-12 02:17:54,517 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:17:54,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:17:54,561 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:17:54,563 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:17:54,564 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:17:54,565 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/eca-rers2012/Problem17_label03.c [2023-11-12 02:17:58,037 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:17:58,540 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:17:58,541 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/sv-benchmarks/c/eca-rers2012/Problem17_label03.c [2023-11-12 02:17:58,573 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/data/abd5e3111/403fca27aaec445395bb648cac4df88c/FLAG658f514ad [2023-11-12 02:17:58,592 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/data/abd5e3111/403fca27aaec445395bb648cac4df88c [2023-11-12 02:17:58,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:17:58,601 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:17:58,604 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:17:58,604 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:17:58,610 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:17:58,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:17:58" (1/1) ... [2023-11-12 02:17:58,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aae531e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:17:58, skipping insertion in model container [2023-11-12 02:17:58,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:17:58" (1/1) ... [2023-11-12 02:17:58,757 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:17:59,053 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_631db6b9-736f-4100-b612-157ac333f532/sv-benchmarks/c/eca-rers2012/Problem17_label03.c[7281,7294] [2023-11-12 02:17:59,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:17:59,935 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:17:59,985 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_631db6b9-736f-4100-b612-157ac333f532/sv-benchmarks/c/eca-rers2012/Problem17_label03.c[7281,7294] [2023-11-12 02:18:00,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:18:00,464 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:18:00,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:00 WrapperNode [2023-11-12 02:18:00,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:18:00,466 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:18:00,467 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:18:00,467 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:18:00,477 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:00" (1/1) ... [2023-11-12 02:18:00,546 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:00" (1/1) ... [2023-11-12 02:18:00,932 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2612 [2023-11-12 02:18:00,933 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:18:00,933 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:18:00,934 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:18:00,934 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:18:00,946 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:00" (1/1) ... [2023-11-12 02:18:00,947 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:00" (1/1) ... [2023-11-12 02:18:01,003 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:00" (1/1) ... [2023-11-12 02:18:01,004 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:00" (1/1) ... [2023-11-12 02:18:01,409 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:00" (1/1) ... [2023-11-12 02:18:01,431 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:00" (1/1) ... [2023-11-12 02:18:01,487 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:00" (1/1) ... [2023-11-12 02:18:01,499 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:00" (1/1) ... [2023-11-12 02:18:01,656 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:18:01,657 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:18:01,657 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:18:01,657 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:18:01,658 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:00" (1/1) ... [2023-11-12 02:18:01,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:18:01,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:01,697 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:18:01,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:18:01,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:18:01,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:18:01,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:18:01,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:18:01,853 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:18:01,855 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:18:06,460 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:18:06,482 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:18:06,483 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:18:06,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:18:06 BoogieIcfgContainer [2023-11-12 02:18:06,487 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:18:06,491 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:18:06,491 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:18:06,495 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:18:06,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:17:58" (1/3) ... [2023-11-12 02:18:06,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4863df13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:18:06, skipping insertion in model container [2023-11-12 02:18:06,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:18:00" (2/3) ... [2023-11-12 02:18:06,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4863df13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:18:06, skipping insertion in model container [2023-11-12 02:18:06,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:18:06" (3/3) ... [2023-11-12 02:18:06,501 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label03.c [2023-11-12 02:18:06,523 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:18:06,524 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:18:06,622 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:18:06,631 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;@4486242a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:18:06,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:18:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 02:18:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-12 02:18:06,651 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:06,652 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] [2023-11-12 02:18:06,653 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:06,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:06,659 INFO L85 PathProgramCache]: Analyzing trace with hash 301649817, now seen corresponding path program 1 times [2023-11-12 02:18:06,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:06,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344460610] [2023-11-12 02:18:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:06,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:07,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:07,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344460610] [2023-11-12 02:18:07,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344460610] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:07,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:07,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:18:07,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64345751] [2023-11-12 02:18:07,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:07,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:07,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:07,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:07,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:18:07,227 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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) [2023-11-12 02:18:11,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:11,381 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2023-11-12 02:18:11,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:11,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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 49 [2023-11-12 02:18:11,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:11,404 INFO L225 Difference]: With dead ends: 1644 [2023-11-12 02:18:11,405 INFO L226 Difference]: Without dead ends: 977 [2023-11-12 02:18:11,411 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 [2023-11-12 02:18:11,415 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 439 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:11,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-12 02:18:11,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2023-11-12 02:18:11,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2023-11-12 02:18:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 1.5536082474226804) internal successors, (1507), 970 states have internal predecessors, (1507), 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) [2023-11-12 02:18:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2023-11-12 02:18:11,519 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 49 [2023-11-12 02:18:11,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:11,519 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2023-11-12 02:18:11,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 2 states have internal predecessors, (49), 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) [2023-11-12 02:18:11,520 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2023-11-12 02:18:11,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-11-12 02:18:11,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:11,526 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:11,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:18:11,527 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:11,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:11,528 INFO L85 PathProgramCache]: Analyzing trace with hash -172834846, now seen corresponding path program 1 times [2023-11-12 02:18:11,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:11,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973399340] [2023-11-12 02:18:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:11,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:11,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:11,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973399340] [2023-11-12 02:18:11,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973399340] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:11,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:11,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:18:11,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69771824] [2023-11-12 02:18:11,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:11,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:11,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:11,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:11,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:18:11,826 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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) [2023-11-12 02:18:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:15,278 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2023-11-12 02:18:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:15,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 116 [2023-11-12 02:18:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:15,292 INFO L225 Difference]: With dead ends: 2813 [2023-11-12 02:18:15,292 INFO L226 Difference]: Without dead ends: 1844 [2023-11-12 02:18:15,299 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 [2023-11-12 02:18:15,306 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:15,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-12 02:18:15,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2023-11-12 02:18:15,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2023-11-12 02:18:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1840 states have (on average 1.35) internal successors, (2484), 1840 states have internal predecessors, (2484), 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) [2023-11-12 02:18:15,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2023-11-12 02:18:15,376 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 116 [2023-11-12 02:18:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:15,379 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2023-11-12 02:18:15,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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) [2023-11-12 02:18:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2023-11-12 02:18:15,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-12 02:18:15,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:15,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:15,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:18:15,391 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:15,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:15,400 INFO L85 PathProgramCache]: Analyzing trace with hash -807304596, now seen corresponding path program 1 times [2023-11-12 02:18:15,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:15,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195109577] [2023-11-12 02:18:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:15,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:15,729 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:15,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:15,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195109577] [2023-11-12 02:18:15,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195109577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:15,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:15,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:18:15,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625178748] [2023-11-12 02:18:15,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:15,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:15,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:18:15,733 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-12 02:18:18,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:18,972 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2023-11-12 02:18:18,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:18,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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 119 [2023-11-12 02:18:18,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:18,990 INFO L225 Difference]: With dead ends: 4552 [2023-11-12 02:18:18,990 INFO L226 Difference]: Without dead ends: 2713 [2023-11-12 02:18:18,993 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 [2023-11-12 02:18:18,994 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 458 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 415 IncrementalHoareTripleChecker+Valid, 1264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:18,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 886 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-12 02:18:19,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2023-11-12 02:18:19,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2023-11-12 02:18:19,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2711 states, 2710 states have (on average 1.3003690036900368) internal successors, (3524), 2710 states have internal predecessors, (3524), 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) [2023-11-12 02:18:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2023-11-12 02:18:19,060 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 119 [2023-11-12 02:18:19,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:19,061 INFO L495 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2023-11-12 02:18:19,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 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) [2023-11-12 02:18:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2023-11-12 02:18:19,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-11-12 02:18:19,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:19,066 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:19,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:18:19,067 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:19,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:19,067 INFO L85 PathProgramCache]: Analyzing trace with hash 182092692, now seen corresponding path program 1 times [2023-11-12 02:18:19,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:19,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031547431] [2023-11-12 02:18:19,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:19,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-12 02:18:19,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:19,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031547431] [2023-11-12 02:18:19,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031547431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:19,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:19,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:18:19,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898693750] [2023-11-12 02:18:19,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:19,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:19,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:19,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:19,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:18:19,392 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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) [2023-11-12 02:18:22,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:22,506 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2023-11-12 02:18:22,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:22,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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 188 [2023-11-12 02:18:22,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:22,529 INFO L225 Difference]: With dead ends: 7984 [2023-11-12 02:18:22,529 INFO L226 Difference]: Without dead ends: 4421 [2023-11-12 02:18:22,534 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 [2023-11-12 02:18:22,535 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:22,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-12 02:18:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2023-11-12 02:18:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2023-11-12 02:18:22,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 1.1775910364145659) internal successors, (4204), 3570 states have internal predecessors, (4204), 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) [2023-11-12 02:18:22,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2023-11-12 02:18:22,621 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 188 [2023-11-12 02:18:22,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:22,622 INFO L495 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2023-11-12 02:18:22,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 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) [2023-11-12 02:18:22,622 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2023-11-12 02:18:22,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-12 02:18:22,625 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:22,626 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:22,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:18:22,626 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:22,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:22,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1924874294, now seen corresponding path program 1 times [2023-11-12 02:18:22,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:22,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975539038] [2023-11-12 02:18:22,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:22,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:22,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:22,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:22,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975539038] [2023-11-12 02:18:22,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975539038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:22,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:22,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:18:22,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036061037] [2023-11-12 02:18:22,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:22,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:22,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:22,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:22,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:18:22,914 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2023-11-12 02:18:25,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:25,375 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2023-11-12 02:18:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:25,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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 201 [2023-11-12 02:18:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:25,409 INFO L225 Difference]: With dead ends: 9273 [2023-11-12 02:18:25,410 INFO L226 Difference]: Without dead ends: 5704 [2023-11-12 02:18:25,415 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 [2023-11-12 02:18:25,416 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:25,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-12 02:18:25,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2023-11-12 02:18:25,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2023-11-12 02:18:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 5703 states have (on average 1.1595651411537786) internal successors, (6613), 5703 states have internal predecessors, (6613), 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) [2023-11-12 02:18:25,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2023-11-12 02:18:25,545 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 201 [2023-11-12 02:18:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:25,546 INFO L495 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2023-11-12 02:18:25,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2023-11-12 02:18:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2023-11-12 02:18:25,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-12 02:18:25,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:25,550 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:25,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 02:18:25,550 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:25,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:25,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1110667493, now seen corresponding path program 1 times [2023-11-12 02:18:25,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:25,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118196440] [2023-11-12 02:18:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:25,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:25,788 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-12 02:18:25,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:25,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118196440] [2023-11-12 02:18:25,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118196440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:25,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:25,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:18:25,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487667775] [2023-11-12 02:18:25,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:25,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:25,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:25,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:25,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:18:25,792 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2023-11-12 02:18:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:28,569 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2023-11-12 02:18:28,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:28,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2023-11-12 02:18:28,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:28,610 INFO L225 Difference]: With dead ends: 14376 [2023-11-12 02:18:28,610 INFO L226 Difference]: Without dead ends: 8673 [2023-11-12 02:18:28,616 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 [2023-11-12 02:18:28,618 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 402 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:28,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-12 02:18:28,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2023-11-12 02:18:28,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2023-11-12 02:18:28,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5677 states, 5676 states have (on average 1.1578576462297392) internal successors, (6572), 5676 states have internal predecessors, (6572), 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) [2023-11-12 02:18:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2023-11-12 02:18:28,764 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 203 [2023-11-12 02:18:28,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:28,765 INFO L495 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2023-11-12 02:18:28,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2023-11-12 02:18:28,765 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2023-11-12 02:18:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2023-11-12 02:18:28,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:28,771 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:28,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 02:18:28,772 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:28,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:28,773 INFO L85 PathProgramCache]: Analyzing trace with hash -145584583, now seen corresponding path program 1 times [2023-11-12 02:18:28,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:28,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087819461] [2023-11-12 02:18:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:28,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-12 02:18:29,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:29,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087819461] [2023-11-12 02:18:29,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087819461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:29,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:29,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:18:29,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519610276] [2023-11-12 02:18:29,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:29,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:29,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:29,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:29,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:18:29,184 INFO L87 Difference]: Start difference. First operand 5677 states and 6572 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2023-11-12 02:18:32,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:32,030 INFO L93 Difference]: Finished difference Result 13935 states and 16238 transitions. [2023-11-12 02:18:32,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:32,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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 281 [2023-11-12 02:18:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:32,062 INFO L225 Difference]: With dead ends: 13935 [2023-11-12 02:18:32,062 INFO L226 Difference]: Without dead ends: 7832 [2023-11-12 02:18:32,068 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 [2023-11-12 02:18:32,069 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 495 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:32,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 629 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-12 02:18:32,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7832 states. [2023-11-12 02:18:32,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7832 to 7402. [2023-11-12 02:18:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7402 states, 7401 states have (on average 1.1638967707066612) internal successors, (8614), 7401 states have internal predecessors, (8614), 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) [2023-11-12 02:18:32,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7402 states to 7402 states and 8614 transitions. [2023-11-12 02:18:32,223 INFO L78 Accepts]: Start accepts. Automaton has 7402 states and 8614 transitions. Word has length 281 [2023-11-12 02:18:32,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:32,224 INFO L495 AbstractCegarLoop]: Abstraction has 7402 states and 8614 transitions. [2023-11-12 02:18:32,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 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) [2023-11-12 02:18:32,224 INFO L276 IsEmpty]: Start isEmpty. Operand 7402 states and 8614 transitions. [2023-11-12 02:18:32,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-11-12 02:18:32,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:32,230 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:32,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 02:18:32,230 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:32,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1693576314, now seen corresponding path program 1 times [2023-11-12 02:18:32,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:32,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725109748] [2023-11-12 02:18:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:32,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-12 02:18:32,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:32,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725109748] [2023-11-12 02:18:32,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725109748] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:32,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:32,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:18:32,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921661763] [2023-11-12 02:18:32,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:32,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:32,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:32,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:32,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:18:32,523 INFO L87 Difference]: Start difference. First operand 7402 states and 8614 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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) [2023-11-12 02:18:35,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:35,587 INFO L93 Difference]: Finished difference Result 19038 states and 22311 transitions. [2023-11-12 02:18:35,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:35,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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 286 [2023-11-12 02:18:35,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:35,617 INFO L225 Difference]: With dead ends: 19038 [2023-11-12 02:18:35,617 INFO L226 Difference]: Without dead ends: 11213 [2023-11-12 02:18:35,626 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 [2023-11-12 02:18:35,627 INFO L413 NwaCegarLoop]: 775 mSDtfsCounter, 379 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:35,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 842 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-12 02:18:35,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11213 states. [2023-11-12 02:18:35,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11213 to 10363. [2023-11-12 02:18:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 10362 states have (on average 1.132117351862575) internal successors, (11731), 10362 states have internal predecessors, (11731), 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) [2023-11-12 02:18:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 11731 transitions. [2023-11-12 02:18:35,820 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 11731 transitions. Word has length 286 [2023-11-12 02:18:35,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:35,820 INFO L495 AbstractCegarLoop]: Abstraction has 10363 states and 11731 transitions. [2023-11-12 02:18:35,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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) [2023-11-12 02:18:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 11731 transitions. [2023-11-12 02:18:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-11-12 02:18:35,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:35,829 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:35,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 02:18:35,829 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:35,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:35,830 INFO L85 PathProgramCache]: Analyzing trace with hash -968764252, now seen corresponding path program 1 times [2023-11-12 02:18:35,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:35,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090550404] [2023-11-12 02:18:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:35,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 273 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-12 02:18:36,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:36,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090550404] [2023-11-12 02:18:36,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090550404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:18:36,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:18:36,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:18:36,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493964538] [2023-11-12 02:18:36,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:18:36,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:18:36,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:36,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:18:36,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:18:36,210 INFO L87 Difference]: Start difference. First operand 10363 states and 11731 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2023-11-12 02:18:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:18:38,843 INFO L93 Difference]: Finished difference Result 24567 states and 27907 transitions. [2023-11-12 02:18:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:18:38,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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 304 [2023-11-12 02:18:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:18:38,872 INFO L225 Difference]: With dead ends: 24567 [2023-11-12 02:18:38,872 INFO L226 Difference]: Without dead ends: 13774 [2023-11-12 02:18:38,882 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 [2023-11-12 02:18:38,884 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 444 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:18:38,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 295 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-12 02:18:38,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13774 states. [2023-11-12 02:18:39,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13774 to 12918. [2023-11-12 02:18:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12918 states, 12917 states have (on average 1.1388867384067507) internal successors, (14711), 12917 states have internal predecessors, (14711), 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) [2023-11-12 02:18:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12918 states to 12918 states and 14711 transitions. [2023-11-12 02:18:39,089 INFO L78 Accepts]: Start accepts. Automaton has 12918 states and 14711 transitions. Word has length 304 [2023-11-12 02:18:39,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:18:39,091 INFO L495 AbstractCegarLoop]: Abstraction has 12918 states and 14711 transitions. [2023-11-12 02:18:39,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 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) [2023-11-12 02:18:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 12918 states and 14711 transitions. [2023-11-12 02:18:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2023-11-12 02:18:39,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:18:39,100 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:18:39,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 02:18:39,100 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:18:39,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:18:39,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1120603921, now seen corresponding path program 1 times [2023-11-12 02:18:39,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:18:39,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989004964] [2023-11-12 02:18:39,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:39,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:18:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 293 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 02:18:39,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:18:39,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989004964] [2023-11-12 02:18:39,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989004964] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:18:39,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066574525] [2023-11-12 02:18:39,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:18:39,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:18:39,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:18:39,967 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:18:40,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_631db6b9-736f-4100-b612-157ac333f532/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:18:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:18:40,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:18:40,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:18:40,924 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 236 proven. 82 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-12 02:18:40,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:18:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 236 proven. 82 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-11-12 02:18:42,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066574525] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:18:42,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:18:42,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2023-11-12 02:18:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550774785] [2023-11-12 02:18:42,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:18:42,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:18:42,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:18:42,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:18:42,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:18:42,161 INFO L87 Difference]: Start difference. First operand 12918 states and 14711 transitions. Second operand has 9 states, 9 states have (on average 84.44444444444444) internal successors, (760), 9 states have internal predecessors, (760), 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)