./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label25.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 244b722e357e7e628c9da22f49af73d4219044ff60ec5c18a778f01607618372 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:16:43,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:16:43,461 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:16:43,471 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:16:43,471 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:16:43,513 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:16:43,514 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:16:43,515 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:16:43,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:16:43,521 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:16:43,522 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:16:43,523 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:16:43,523 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:16:43,525 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:16:43,525 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:16:43,526 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:16:43,526 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:16:43,527 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:16:43,527 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:16:43,527 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:16:43,528 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:16:43,528 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:16:43,529 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:16:43,529 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:16:43,530 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:16:43,530 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:16:43,531 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:16:43,531 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:16:43,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:16:43,532 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:16:43,534 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:16:43,534 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:16:43,534 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:16:43,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:16:43,535 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:16:43,535 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:16:43,535 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:16:43,535 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:16:43,536 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:16:43,536 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_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 244b722e357e7e628c9da22f49af73d4219044ff60ec5c18a778f01607618372 [2023-11-06 22:16:43,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:16:43,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:16:43,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:16:43,879 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:16:43,880 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:16:43,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/eca-rers2012/Problem17_label25.c [2023-11-06 22:16:47,212 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:16:47,724 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:16:47,725 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/sv-benchmarks/c/eca-rers2012/Problem17_label25.c [2023-11-06 22:16:47,750 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/data/613ca148f/e0409c860e38431aa46402f47f4bac09/FLAG6ffbc5f1a [2023-11-06 22:16:47,768 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/data/613ca148f/e0409c860e38431aa46402f47f4bac09 [2023-11-06 22:16:47,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:16:47,777 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:16:47,781 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:16:47,781 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:16:47,787 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:16:47,790 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:16:47" (1/1) ... [2023-11-06 22:16:47,791 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@221284de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:47, skipping insertion in model container [2023-11-06 22:16:47,791 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:16:47" (1/1) ... [2023-11-06 22:16:47,925 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:16:48,151 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_1f8b20ac-4da8-433e-9b9c-87fc496432ac/sv-benchmarks/c/eca-rers2012/Problem17_label25.c[3642,3655] [2023-11-06 22:16:49,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:16:49,137 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:16:49,170 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_1f8b20ac-4da8-433e-9b9c-87fc496432ac/sv-benchmarks/c/eca-rers2012/Problem17_label25.c[3642,3655] [2023-11-06 22:16:49,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:16:49,592 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:16:49,593 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:49 WrapperNode [2023-11-06 22:16:49,593 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:16:49,594 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:16:49,595 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:16:49,595 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:16:49,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:49" (1/1) ... [2023-11-06 22:16:49,661 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:49" (1/1) ... [2023-11-06 22:16:49,952 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2612 [2023-11-06 22:16:49,952 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:16:49,953 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:16:49,953 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:16:49,953 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:16:49,964 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:49" (1/1) ... [2023-11-06 22:16:49,964 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:49" (1/1) ... [2023-11-06 22:16:50,089 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:49" (1/1) ... [2023-11-06 22:16:50,095 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:49" (1/1) ... [2023-11-06 22:16:50,262 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:49" (1/1) ... [2023-11-06 22:16:50,292 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:49" (1/1) ... [2023-11-06 22:16:50,341 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:49" (1/1) ... [2023-11-06 22:16:50,355 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:49" (1/1) ... [2023-11-06 22:16:50,482 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:16:50,484 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:16:50,484 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:16:50,484 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:16:50,485 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:49" (1/1) ... [2023-11-06 22:16:50,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:16:50,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:16:50,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:16:50,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:16:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:16:50,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:16:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:16:50,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:16:50,659 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:16:50,662 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:16:55,037 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:16:55,063 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:16:55,063 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:16:55,067 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:16:55 BoogieIcfgContainer [2023-11-06 22:16:55,067 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:16:55,074 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:16:55,074 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:16:55,078 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:16:55,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:16:47" (1/3) ... [2023-11-06 22:16:55,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6913555a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:16:55, skipping insertion in model container [2023-11-06 22:16:55,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:49" (2/3) ... [2023-11-06 22:16:55,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6913555a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:16:55, skipping insertion in model container [2023-11-06 22:16:55,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:16:55" (3/3) ... [2023-11-06 22:16:55,084 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem17_label25.c [2023-11-06 22:16:55,106 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:16:55,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:16:55,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:16:55,209 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c7bc928, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:16:55,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:16:55,222 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) [2023-11-06 22:16:55,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-06 22:16:55,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:55,235 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] [2023-11-06 22:16:55,235 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:55,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:55,243 INFO L85 PathProgramCache]: Analyzing trace with hash -573341295, now seen corresponding path program 1 times [2023-11-06 22:16:55,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:55,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704895893] [2023-11-06 22:16:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:55,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:16:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:16:55,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:16:55,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704895893] [2023-11-06 22:16:55,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704895893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:16:55,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:16:55,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:16:55,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306886920] [2023-11-06 22:16:55,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:16:55,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:16:55,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:16:55,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:16:55,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:16:55,660 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 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:59,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:16:59,504 INFO L93 Difference]: Finished difference Result 1644 states and 3029 transitions. [2023-11-06 22:16:59,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:16:59,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 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 23 [2023-11-06 22:16:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:16:59,528 INFO L225 Difference]: With dead ends: 1644 [2023-11-06 22:16:59,528 INFO L226 Difference]: Without dead ends: 977 [2023-11-06 22:16:59,534 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 [2023-11-06 22:16:59,538 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 465 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 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, 3.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:16:59,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 503 Invalid, 1802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-06 22:16:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2023-11-06 22:16:59,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 971. [2023-11-06 22:16:59,644 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) [2023-11-06 22:16:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1507 transitions. [2023-11-06 22:16:59,652 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1507 transitions. Word has length 23 [2023-11-06 22:16:59,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:16:59,653 INFO L495 AbstractCegarLoop]: Abstraction has 971 states and 1507 transitions. [2023-11-06 22:16:59,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:16:59,654 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1507 transitions. [2023-11-06 22:16:59,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-06 22:16:59,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:16:59,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:16:59,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:16:59,659 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:16:59,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:16:59,660 INFO L85 PathProgramCache]: Analyzing trace with hash 977233274, now seen corresponding path program 1 times [2023-11-06 22:16:59,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:16:59,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255462421] [2023-11-06 22:16:59,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:16:59,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:16:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:00,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:00,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255462421] [2023-11-06 22:17:00,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255462421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:00,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:00,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:17:00,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768890679] [2023-11-06 22:17:00,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:00,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:00,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:00,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:00,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:00,017 INFO L87 Difference]: Start difference. First operand 971 states and 1507 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:03,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:03,303 INFO L93 Difference]: Finished difference Result 2813 states and 4381 transitions. [2023-11-06 22:17:03,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:03,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 90 [2023-11-06 22:17:03,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:03,315 INFO L225 Difference]: With dead ends: 2813 [2023-11-06 22:17:03,315 INFO L226 Difference]: Without dead ends: 1844 [2023-11-06 22:17:03,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:03,319 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 405 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s 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, 3.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:03,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 579 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-06 22:17:03,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2023-11-06 22:17:03,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1841. [2023-11-06 22:17:03,374 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) [2023-11-06 22:17:03,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2484 transitions. [2023-11-06 22:17:03,384 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2484 transitions. Word has length 90 [2023-11-06 22:17:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:03,385 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2484 transitions. [2023-11-06 22:17:03,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2484 transitions. [2023-11-06 22:17:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-06 22:17:03,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:03,395 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:03,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 22:17:03,396 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:03,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:03,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1040101436, now seen corresponding path program 1 times [2023-11-06 22:17:03,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:03,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567053462] [2023-11-06 22:17:03,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:03,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:03,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:03,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567053462] [2023-11-06 22:17:03,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567053462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:03,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:03,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:17:03,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684294830] [2023-11-06 22:17:03,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:03,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:03,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:03,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:03,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:03,684 INFO L87 Difference]: Start difference. First operand 1841 states and 2484 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:06,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:06,994 INFO L93 Difference]: Finished difference Result 4552 states and 6282 transitions. [2023-11-06 22:17:06,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:06,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 93 [2023-11-06 22:17:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:07,016 INFO L225 Difference]: With dead ends: 4552 [2023-11-06 22:17:07,017 INFO L226 Difference]: Without dead ends: 2713 [2023-11-06 22:17:07,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:07,030 INFO L413 NwaCegarLoop]: 818 mSDtfsCounter, 484 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1264 mSolverCounterSat, 415 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 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, 3.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:07,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 886 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [415 Valid, 1264 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-06 22:17:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2023-11-06 22:17:07,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2711. [2023-11-06 22:17:07,105 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) [2023-11-06 22:17:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2711 states to 2711 states and 3524 transitions. [2023-11-06 22:17:07,114 INFO L78 Accepts]: Start accepts. Automaton has 2711 states and 3524 transitions. Word has length 93 [2023-11-06 22:17:07,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:07,119 INFO L495 AbstractCegarLoop]: Abstraction has 2711 states and 3524 transitions. [2023-11-06 22:17:07,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2711 states and 3524 transitions. [2023-11-06 22:17:07,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-11-06 22:17:07,126 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:07,128 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:07,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 22:17:07,128 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:07,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:07,139 INFO L85 PathProgramCache]: Analyzing trace with hash 153064972, now seen corresponding path program 1 times [2023-11-06 22:17:07,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:07,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324647345] [2023-11-06 22:17:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:07,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2023-11-06 22:17:07,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:07,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324647345] [2023-11-06 22:17:07,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324647345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:07,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:07,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:17:07,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620253990] [2023-11-06 22:17:07,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:07,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:07,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:07,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:07,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:07,508 INFO L87 Difference]: Start difference. First operand 2711 states and 3524 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:10,651 INFO L93 Difference]: Finished difference Result 7984 states and 10361 transitions. [2023-11-06 22:17:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:10,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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 162 [2023-11-06 22:17:10,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:10,684 INFO L225 Difference]: With dead ends: 7984 [2023-11-06 22:17:10,684 INFO L226 Difference]: Without dead ends: 4421 [2023-11-06 22:17:10,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:10,692 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s 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 [2023-11-06 22:17:10,693 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] [2023-11-06 22:17:10,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4421 states. [2023-11-06 22:17:10,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4421 to 3571. [2023-11-06 22:17:10,841 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) [2023-11-06 22:17:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 4204 transitions. [2023-11-06 22:17:10,852 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 4204 transitions. Word has length 162 [2023-11-06 22:17:10,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:10,853 INFO L495 AbstractCegarLoop]: Abstraction has 3571 states and 4204 transitions. [2023-11-06 22:17:10,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:10,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 4204 transitions. [2023-11-06 22:17:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-06 22:17:10,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:10,856 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:10,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 22:17:10,857 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:10,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:10,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1508695954, now seen corresponding path program 1 times [2023-11-06 22:17:10,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:10,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628848609] [2023-11-06 22:17:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:10,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:11,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:11,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628848609] [2023-11-06 22:17:11,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628848609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:11,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:11,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:17:11,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011425052] [2023-11-06 22:17:11,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:11,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:11,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:11,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:11,220 INFO L87 Difference]: Start difference. First operand 3571 states and 4204 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:13,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:13,878 INFO L93 Difference]: Finished difference Result 9273 states and 11087 transitions. [2023-11-06 22:17:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:13,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 175 [2023-11-06 22:17:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:13,914 INFO L225 Difference]: With dead ends: 9273 [2023-11-06 22:17:13,914 INFO L226 Difference]: Without dead ends: 5704 [2023-11-06 22:17:13,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:13,921 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:13,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-06 22:17:13,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2023-11-06 22:17:14,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5704. [2023-11-06 22:17:14,137 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) [2023-11-06 22:17:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 6613 transitions. [2023-11-06 22:17:14,153 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 6613 transitions. Word has length 175 [2023-11-06 22:17:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:14,154 INFO L495 AbstractCegarLoop]: Abstraction has 5704 states and 6613 transitions. [2023-11-06 22:17:14,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 6613 transitions. [2023-11-06 22:17:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2023-11-06 22:17:14,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:14,158 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:14,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 22:17:14,158 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:14,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:14,159 INFO L85 PathProgramCache]: Analyzing trace with hash 311018387, now seen corresponding path program 1 times [2023-11-06 22:17:14,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:14,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750580224] [2023-11-06 22:17:14,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:14,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-11-06 22:17:14,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:14,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750580224] [2023-11-06 22:17:14,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750580224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:14,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:14,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:17:14,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805352557] [2023-11-06 22:17:14,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:14,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:14,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:14,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:14,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:14,403 INFO L87 Difference]: Start difference. First operand 5704 states and 6613 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:17,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:17,768 INFO L93 Difference]: Finished difference Result 14376 states and 16776 transitions. [2023-11-06 22:17:17,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:17,769 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 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 177 [2023-11-06 22:17:17,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:17,822 INFO L225 Difference]: With dead ends: 14376 [2023-11-06 22:17:17,823 INFO L226 Difference]: Without dead ends: 8673 [2023-11-06 22:17:17,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:17,831 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 428 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 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, 3.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:17,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [428 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-06 22:17:17,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8673 states. [2023-11-06 22:17:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8673 to 5677. [2023-11-06 22:17:18,000 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) [2023-11-06 22:17:18,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5677 states to 5677 states and 6572 transitions. [2023-11-06 22:17:18,020 INFO L78 Accepts]: Start accepts. Automaton has 5677 states and 6572 transitions. Word has length 177 [2023-11-06 22:17:18,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:18,021 INFO L495 AbstractCegarLoop]: Abstraction has 5677 states and 6572 transitions. [2023-11-06 22:17:18,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 5677 states and 6572 transitions. [2023-11-06 22:17:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-11-06 22:17:18,028 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:18,028 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:18,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 22:17:18,029 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:18,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:18,030 INFO L85 PathProgramCache]: Analyzing trace with hash 686495377, now seen corresponding path program 1 times [2023-11-06 22:17:18,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:18,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358641031] [2023-11-06 22:17:18,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:18,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:18,345 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-06 22:17:18,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:18,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358641031] [2023-11-06 22:17:18,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358641031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:18,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:18,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:17:18,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851028733] [2023-11-06 22:17:18,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:18,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:18,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:18,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:18,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:18,349 INFO L87 Difference]: Start difference. First operand 5677 states and 6572 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:21,661 INFO L93 Difference]: Finished difference Result 14315 states and 16680 transitions. [2023-11-06 22:17:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:21,663 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 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 255 [2023-11-06 22:17:21,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:21,707 INFO L225 Difference]: With dead ends: 14315 [2023-11-06 22:17:21,707 INFO L226 Difference]: Without dead ends: 7790 [2023-11-06 22:17:21,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:21,718 INFO L413 NwaCegarLoop]: 778 mSDtfsCounter, 383 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:21,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 847 Invalid, 1457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-06 22:17:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2023-11-06 22:17:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 7790. [2023-11-06 22:17:21,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7790 states, 7789 states have (on average 1.1186288355372962) internal successors, (8713), 7789 states have internal predecessors, (8713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:21,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7790 states to 7790 states and 8713 transitions. [2023-11-06 22:17:21,943 INFO L78 Accepts]: Start accepts. Automaton has 7790 states and 8713 transitions. Word has length 255 [2023-11-06 22:17:21,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:21,944 INFO L495 AbstractCegarLoop]: Abstraction has 7790 states and 8713 transitions. [2023-11-06 22:17:21,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:21,945 INFO L276 IsEmpty]: Start isEmpty. Operand 7790 states and 8713 transitions. [2023-11-06 22:17:21,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-06 22:17:21,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:21,953 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:21,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 22:17:21,954 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:21,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:21,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1527796204, now seen corresponding path program 1 times [2023-11-06 22:17:21,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:21,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802887123] [2023-11-06 22:17:21,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:21,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:22,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2023-11-06 22:17:22,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:22,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802887123] [2023-11-06 22:17:22,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802887123] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:22,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:22,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:17:22,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199045229] [2023-11-06 22:17:22,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:22,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:22,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:22,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:22,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:22,318 INFO L87 Difference]: Start difference. First operand 7790 states and 8713 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:25,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:25,803 INFO L93 Difference]: Finished difference Result 18558 states and 20949 transitions. [2023-11-06 22:17:25,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:25,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 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 295 [2023-11-06 22:17:25,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:25,850 INFO L225 Difference]: With dead ends: 18558 [2023-11-06 22:17:25,850 INFO L226 Difference]: Without dead ends: 10770 [2023-11-06 22:17:25,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:25,862 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 482 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:25,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [482 Valid, 330 Invalid, 1477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-06 22:17:25,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10770 states. [2023-11-06 22:17:26,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10770 to 9916. [2023-11-06 22:17:26,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9916 states, 9915 states have (on average 1.1232476046394353) internal successors, (11137), 9915 states have internal predecessors, (11137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9916 states to 9916 states and 11137 transitions. [2023-11-06 22:17:26,097 INFO L78 Accepts]: Start accepts. Automaton has 9916 states and 11137 transitions. Word has length 295 [2023-11-06 22:17:26,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:26,098 INFO L495 AbstractCegarLoop]: Abstraction has 9916 states and 11137 transitions. [2023-11-06 22:17:26,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:26,098 INFO L276 IsEmpty]: Start isEmpty. Operand 9916 states and 11137 transitions. [2023-11-06 22:17:26,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2023-11-06 22:17:26,108 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:26,108 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:26,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 22:17:26,109 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:26,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:26,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1391208072, now seen corresponding path program 1 times [2023-11-06 22:17:26,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:26,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483664588] [2023-11-06 22:17:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:26,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:27,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:27,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483664588] [2023-11-06 22:17:27,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483664588] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:27,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957649834] [2023-11-06 22:17:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:27,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:27,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:27,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:27,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:17:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:27,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:17:27,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 41 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:28,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:28,727 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:28,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957649834] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:28,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:28,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2023-11-06 22:17:28,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041579039] [2023-11-06 22:17:28,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:28,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:17:28,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:28,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:17:28,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:17:28,738 INFO L87 Difference]: Start difference. First operand 9916 states and 11137 transitions. Second operand has 4 states, 4 states have (on average 78.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:34,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:34,330 INFO L93 Difference]: Finished difference Result 27938 states and 31646 transitions. [2023-11-06 22:17:34,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:17:34,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.0) internal successors, (312), 3 states have internal predecessors, (312), 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 312 [2023-11-06 22:17:34,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:34,371 INFO L225 Difference]: With dead ends: 27938 [2023-11-06 22:17:34,372 INFO L226 Difference]: Without dead ends: 17589 [2023-11-06 22:17:34,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 621 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:17:34,385 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 874 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 893 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 3069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 893 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:34,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 166 Invalid, 3069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [893 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-06 22:17:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17589 states. [2023-11-06 22:17:34,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17589 to 17588. [2023-11-06 22:17:34,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17588 states, 17587 states have (on average 1.1217376471257179) internal successors, (19728), 17587 states have internal predecessors, (19728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17588 states to 17588 states and 19728 transitions. [2023-11-06 22:17:34,716 INFO L78 Accepts]: Start accepts. Automaton has 17588 states and 19728 transitions. Word has length 312 [2023-11-06 22:17:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:34,717 INFO L495 AbstractCegarLoop]: Abstraction has 17588 states and 19728 transitions. [2023-11-06 22:17:34,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 17588 states and 19728 transitions. [2023-11-06 22:17:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2023-11-06 22:17:34,727 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:34,728 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:34,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:34,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:34,936 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:34,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash -92363419, now seen corresponding path program 1 times [2023-11-06 22:17:34,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:34,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74659687] [2023-11-06 22:17:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:34,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2023-11-06 22:17:35,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:35,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74659687] [2023-11-06 22:17:35,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74659687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:35,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:35,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:17:35,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907951310] [2023-11-06 22:17:35,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:35,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:17:35,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:35,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:17:35,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:35,980 INFO L87 Difference]: Start difference. First operand 17588 states and 19728 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:39,550 INFO L93 Difference]: Finished difference Result 44128 states and 49461 transitions. [2023-11-06 22:17:39,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:17:39,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 335 [2023-11-06 22:17:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:39,606 INFO L225 Difference]: With dead ends: 44128 [2023-11-06 22:17:39,607 INFO L226 Difference]: Without dead ends: 26117 [2023-11-06 22:17:39,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:17:39,623 INFO L413 NwaCegarLoop]: 772 mSDtfsCounter, 432 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:39,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 831 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-06 22:17:39,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26117 states. [2023-11-06 22:17:39,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26117 to 24826. [2023-11-06 22:17:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24826 states, 24825 states have (on average 1.1090835850956697) internal successors, (27533), 24825 states have internal predecessors, (27533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24826 states to 24826 states and 27533 transitions. [2023-11-06 22:17:40,014 INFO L78 Accepts]: Start accepts. Automaton has 24826 states and 27533 transitions. Word has length 335 [2023-11-06 22:17:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:40,015 INFO L495 AbstractCegarLoop]: Abstraction has 24826 states and 27533 transitions. [2023-11-06 22:17:40,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 24826 states and 27533 transitions. [2023-11-06 22:17:40,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2023-11-06 22:17:40,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:40,028 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:40,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 22:17:40,028 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:40,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:40,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1726394596, now seen corresponding path program 1 times [2023-11-06 22:17:40,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:40,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989243112] [2023-11-06 22:17:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:40,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:40,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:40,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:40,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989243112] [2023-11-06 22:17:40,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989243112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:40,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:17:40,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:17:40,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590342615] [2023-11-06 22:17:40,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:40,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:17:40,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:40,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:17:40,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:17:40,577 INFO L87 Difference]: Start difference. First operand 24826 states and 27533 transitions. Second operand has 4 states, 4 states have (on average 90.5) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:44,968 INFO L93 Difference]: Finished difference Result 65001 states and 72156 transitions. [2023-11-06 22:17:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:17:44,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 3 states have internal predecessors, (362), 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 362 [2023-11-06 22:17:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:45,045 INFO L225 Difference]: With dead ends: 65001 [2023-11-06 22:17:45,045 INFO L226 Difference]: Without dead ends: 38474 [2023-11-06 22:17:45,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:17:45,067 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 553 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:45,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 362 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-06 22:17:45,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38474 states. [2023-11-06 22:17:45,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38474 to 36751. [2023-11-06 22:17:45,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36751 states, 36750 states have (on average 1.1042448979591837) internal successors, (40581), 36750 states have internal predecessors, (40581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36751 states to 36751 states and 40581 transitions. [2023-11-06 22:17:45,713 INFO L78 Accepts]: Start accepts. Automaton has 36751 states and 40581 transitions. Word has length 362 [2023-11-06 22:17:45,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:45,714 INFO L495 AbstractCegarLoop]: Abstraction has 36751 states and 40581 transitions. [2023-11-06 22:17:45,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.5) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:45,715 INFO L276 IsEmpty]: Start isEmpty. Operand 36751 states and 40581 transitions. [2023-11-06 22:17:45,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2023-11-06 22:17:45,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:45,734 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:45,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 22:17:45,735 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:45,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:45,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1073513797, now seen corresponding path program 1 times [2023-11-06 22:17:45,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:45,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298768862] [2023-11-06 22:17:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:45,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 42 proven. 249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:17:46,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:46,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298768862] [2023-11-06 22:17:46,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298768862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:46,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751827695] [2023-11-06 22:17:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:46,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:46,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:46,796 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:46,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:17:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:47,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:17:47,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2023-11-06 22:17:47,439 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:17:47,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751827695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:17:47,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:17:47,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-06 22:17:47,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437800454] [2023-11-06 22:17:47,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:47,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:17:47,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:47,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:17:47,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:17:47,443 INFO L87 Difference]: Start difference. First operand 36751 states and 40581 transitions. Second operand has 4 states, 4 states have (on average 78.5) internal successors, (314), 4 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:52,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:17:52,156 INFO L93 Difference]: Finished difference Result 93107 states and 102894 transitions. [2023-11-06 22:17:52,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:17:52,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 78.5) internal successors, (314), 4 states have internal predecessors, (314), 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 386 [2023-11-06 22:17:52,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:17:52,240 INFO L225 Difference]: With dead ends: 93107 [2023-11-06 22:17:52,240 INFO L226 Difference]: Without dead ends: 55506 [2023-11-06 22:17:52,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-06 22:17:52,271 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 796 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 2947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:17:52,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 260 Invalid, 2947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-06 22:17:52,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55506 states. [2023-11-06 22:17:53,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55506 to 52524. [2023-11-06 22:17:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52524 states, 52523 states have (on average 1.1018030196294957) internal successors, (57870), 52523 states have internal predecessors, (57870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:53,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52524 states to 52524 states and 57870 transitions. [2023-11-06 22:17:53,254 INFO L78 Accepts]: Start accepts. Automaton has 52524 states and 57870 transitions. Word has length 386 [2023-11-06 22:17:53,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:17:53,255 INFO L495 AbstractCegarLoop]: Abstraction has 52524 states and 57870 transitions. [2023-11-06 22:17:53,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 78.5) internal successors, (314), 4 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:17:53,256 INFO L276 IsEmpty]: Start isEmpty. Operand 52524 states and 57870 transitions. [2023-11-06 22:17:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2023-11-06 22:17:53,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:17:53,275 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:17:53,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:17:53,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:53,482 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:17:53,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:17:53,483 INFO L85 PathProgramCache]: Analyzing trace with hash 226055053, now seen corresponding path program 1 times [2023-11-06 22:17:53,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:17:53,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811236088] [2023-11-06 22:17:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:53,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:17:53,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:54,626 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:17:54,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:17:54,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811236088] [2023-11-06 22:17:54,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811236088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:54,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595093887] [2023-11-06 22:17:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:17:54,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:17:54,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:17:54,629 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:17:54,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:17:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:17:54,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:17:54,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:17:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 202 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:17:55,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:17:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 280 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:17:55,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595093887] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 22:17:55,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:17:55,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2023-11-06 22:17:55,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342759425] [2023-11-06 22:17:55,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:17:55,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:17:55,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:17:55,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:17:55,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:17:55,602 INFO L87 Difference]: Start difference. First operand 52524 states and 57870 transitions. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:00,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:00,067 INFO L93 Difference]: Finished difference Result 118259 states and 130441 transitions. [2023-11-06 22:18:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:00,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 391 [2023-11-06 22:18:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:00,134 INFO L225 Difference]: With dead ends: 118259 [2023-11-06 22:18:00,134 INFO L226 Difference]: Without dead ends: 65310 [2023-11-06 22:18:00,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 779 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:18:00,162 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 882 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2249 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 2249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:00,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 181 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 2249 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-06 22:18:00,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65310 states. [2023-11-06 22:18:01,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65310 to 60630. [2023-11-06 22:18:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60630 states, 60629 states have (on average 1.1056755018225601) internal successors, (67036), 60629 states have internal predecessors, (67036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60630 states to 60630 states and 67036 transitions. [2023-11-06 22:18:01,292 INFO L78 Accepts]: Start accepts. Automaton has 60630 states and 67036 transitions. Word has length 391 [2023-11-06 22:18:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:01,293 INFO L495 AbstractCegarLoop]: Abstraction has 60630 states and 67036 transitions. [2023-11-06 22:18:01,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 60630 states and 67036 transitions. [2023-11-06 22:18:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2023-11-06 22:18:01,312 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:01,313 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:01,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:01,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:18:01,520 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:01,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:01,521 INFO L85 PathProgramCache]: Analyzing trace with hash -363636585, now seen corresponding path program 1 times [2023-11-06 22:18:01,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:01,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206480944] [2023-11-06 22:18:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:01,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 331 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:18:02,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:02,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206480944] [2023-11-06 22:18:02,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206480944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:02,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:02,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:18:02,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384782349] [2023-11-06 22:18:02,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:02,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:18:02,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:02,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:18:02,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:18:02,768 INFO L87 Difference]: Start difference. First operand 60630 states and 67036 transitions. Second operand has 4 states, 4 states have (on average 101.25) internal successors, (405), 4 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:07,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:07,786 INFO L93 Difference]: Finished difference Result 153670 states and 169450 transitions. [2023-11-06 22:18:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:18:07,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 101.25) internal successors, (405), 4 states have internal predecessors, (405), 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 405 [2023-11-06 22:18:07,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:07,941 INFO L225 Difference]: With dead ends: 153670 [2023-11-06 22:18:07,941 INFO L226 Difference]: Without dead ends: 93042 [2023-11-06 22:18:07,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:18:07,969 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 717 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 2796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:07,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 188 Invalid, 2796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-06 22:18:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93042 states. [2023-11-06 22:18:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93042 to 86649. [2023-11-06 22:18:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86649 states, 86648 states have (on average 1.104687932785523) internal successors, (95719), 86648 states have internal predecessors, (95719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86649 states to 86649 states and 95719 transitions. [2023-11-06 22:18:09,680 INFO L78 Accepts]: Start accepts. Automaton has 86649 states and 95719 transitions. Word has length 405 [2023-11-06 22:18:09,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:09,681 INFO L495 AbstractCegarLoop]: Abstraction has 86649 states and 95719 transitions. [2023-11-06 22:18:09,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.25) internal successors, (405), 4 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:09,681 INFO L276 IsEmpty]: Start isEmpty. Operand 86649 states and 95719 transitions. [2023-11-06 22:18:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2023-11-06 22:18:09,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:09,695 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:09,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-06 22:18:09,695 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:09,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:09,696 INFO L85 PathProgramCache]: Analyzing trace with hash 232477028, now seen corresponding path program 1 times [2023-11-06 22:18:09,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:09,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655801923] [2023-11-06 22:18:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:09,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-06 22:18:10,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:10,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655801923] [2023-11-06 22:18:10,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655801923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:10,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:10,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:18:10,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062814651] [2023-11-06 22:18:10,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:10,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:18:10,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:10,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:18:10,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:10,412 INFO L87 Difference]: Start difference. First operand 86649 states and 95719 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:14,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:14,005 INFO L93 Difference]: Finished difference Result 188178 states and 207854 transitions. [2023-11-06 22:18:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:18:14,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 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 427 [2023-11-06 22:18:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:14,123 INFO L225 Difference]: With dead ends: 188178 [2023-11-06 22:18:14,124 INFO L226 Difference]: Without dead ends: 95986 [2023-11-06 22:18:14,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:14,153 INFO L413 NwaCegarLoop]: 664 mSDtfsCounter, 498 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:14,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 709 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-06 22:18:14,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95986 states. [2023-11-06 22:18:15,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95986 to 95975. [2023-11-06 22:18:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95975 states, 95974 states have (on average 1.0926813511992832) internal successors, (104869), 95974 states have internal predecessors, (104869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95975 states to 95975 states and 104869 transitions. [2023-11-06 22:18:15,866 INFO L78 Accepts]: Start accepts. Automaton has 95975 states and 104869 transitions. Word has length 427 [2023-11-06 22:18:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:15,866 INFO L495 AbstractCegarLoop]: Abstraction has 95975 states and 104869 transitions. [2023-11-06 22:18:15,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:15,867 INFO L276 IsEmpty]: Start isEmpty. Operand 95975 states and 104869 transitions. [2023-11-06 22:18:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-11-06 22:18:15,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:15,885 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-06 22:18:15,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-06 22:18:15,886 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:15,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:15,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1783078949, now seen corresponding path program 1 times [2023-11-06 22:18:15,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:15,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679432779] [2023-11-06 22:18:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:15,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 299 proven. 82 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:18:19,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:19,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679432779] [2023-11-06 22:18:19,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679432779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:18:19,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514736681] [2023-11-06 22:18:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:19,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:19,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:18:19,004 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:18:19,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:18:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:19,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 22:18:19,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:18:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 299 proven. 82 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:18:20,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:18:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 299 proven. 82 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:18:22,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514736681] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:18:22,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:18:22,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2023-11-06 22:18:22,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592664784] [2023-11-06 22:18:22,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:18:22,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 22:18:22,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:22,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 22:18:22,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:18:22,369 INFO L87 Difference]: Start difference. First operand 95975 states and 104869 transitions. Second operand has 10 states, 10 states have (on average 97.6) internal successors, (976), 9 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:33,346 INFO L93 Difference]: Finished difference Result 227492 states and 248767 transitions. [2023-11-06 22:18:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 22:18:33,347 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 97.6) internal successors, (976), 9 states have internal predecessors, (976), 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 476 [2023-11-06 22:18:33,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:33,485 INFO L225 Difference]: With dead ends: 227492 [2023-11-06 22:18:33,485 INFO L226 Difference]: Without dead ends: 131519 [2023-11-06 22:18:33,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 961 GetRequests, 947 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:18:33,514 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 3255 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 6257 mSolverCounterSat, 1134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3255 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 7391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1134 IncrementalHoareTripleChecker+Valid, 6257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:33,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3255 Valid, 342 Invalid, 7391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1134 Valid, 6257 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2023-11-06 22:18:33,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131519 states. [2023-11-06 22:18:35,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131519 to 121057. [2023-11-06 22:18:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121057 states, 121056 states have (on average 1.0867862807295796) internal successors, (131562), 121056 states have internal predecessors, (131562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121057 states to 121057 states and 131562 transitions. [2023-11-06 22:18:35,911 INFO L78 Accepts]: Start accepts. Automaton has 121057 states and 131562 transitions. Word has length 476 [2023-11-06 22:18:35,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:35,912 INFO L495 AbstractCegarLoop]: Abstraction has 121057 states and 131562 transitions. [2023-11-06 22:18:35,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 97.6) internal successors, (976), 9 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 121057 states and 131562 transitions. [2023-11-06 22:18:35,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-06 22:18:35,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:35,919 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:35,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:18:36,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f8b20ac-4da8-433e-9b9c-87fc496432ac/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:18:36,120 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:36,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:36,121 INFO L85 PathProgramCache]: Analyzing trace with hash 43318759, now seen corresponding path program 1 times [2023-11-06 22:18:36,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:36,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42968950] [2023-11-06 22:18:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:36,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-06 22:18:36,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:36,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42968950] [2023-11-06 22:18:36,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42968950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:36,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:36,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:18:36,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718288993] [2023-11-06 22:18:36,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:36,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:18:36,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:36,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:18:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:36,642 INFO L87 Difference]: Start difference. First operand 121057 states and 131562 transitions. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:40,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:40,476 INFO L93 Difference]: Finished difference Result 256167 states and 278654 transitions. [2023-11-06 22:18:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:18:40,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 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 492 [2023-11-06 22:18:40,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:40,697 INFO L225 Difference]: With dead ends: 256167 [2023-11-06 22:18:40,697 INFO L226 Difference]: Without dead ends: 132986 [2023-11-06 22:18:40,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:40,769 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 437 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:40,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 590 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-06 22:18:40,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132986 states. [2023-11-06 22:18:42,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132986 to 129572. [2023-11-06 22:18:42,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129572 states, 129571 states have (on average 1.0843244244468284) internal successors, (140497), 129571 states have internal predecessors, (140497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129572 states to 129572 states and 140497 transitions. [2023-11-06 22:18:43,059 INFO L78 Accepts]: Start accepts. Automaton has 129572 states and 140497 transitions. Word has length 492 [2023-11-06 22:18:43,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:43,059 INFO L495 AbstractCegarLoop]: Abstraction has 129572 states and 140497 transitions. [2023-11-06 22:18:43,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:43,059 INFO L276 IsEmpty]: Start isEmpty. Operand 129572 states and 140497 transitions. [2023-11-06 22:18:43,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2023-11-06 22:18:43,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:43,071 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:43,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 22:18:43,072 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:43,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:43,072 INFO L85 PathProgramCache]: Analyzing trace with hash 174057188, now seen corresponding path program 1 times [2023-11-06 22:18:43,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:43,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106927348] [2023-11-06 22:18:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:43,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 547 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-11-06 22:18:44,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:44,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106927348] [2023-11-06 22:18:44,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106927348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:44,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:44,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:18:44,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864543534] [2023-11-06 22:18:44,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:44,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:18:44,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:44,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:18:44,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:44,525 INFO L87 Difference]: Start difference. First operand 129572 states and 140497 transitions. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:48,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:48,408 INFO L93 Difference]: Finished difference Result 271926 states and 294636 transitions. [2023-11-06 22:18:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:18:48,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 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 539 [2023-11-06 22:18:48,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:48,584 INFO L225 Difference]: With dead ends: 271926 [2023-11-06 22:18:48,584 INFO L226 Difference]: Without dead ends: 143206 [2023-11-06 22:18:48,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:48,644 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 300 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 1346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:48,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 773 Invalid, 1346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-06 22:18:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143206 states. [2023-11-06 22:18:51,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143206 to 140209. [2023-11-06 22:18:51,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140209 states, 140208 states have (on average 1.0785404541823576) internal successors, (151220), 140208 states have internal predecessors, (151220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140209 states to 140209 states and 151220 transitions. [2023-11-06 22:18:51,600 INFO L78 Accepts]: Start accepts. Automaton has 140209 states and 151220 transitions. Word has length 539 [2023-11-06 22:18:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:51,600 INFO L495 AbstractCegarLoop]: Abstraction has 140209 states and 151220 transitions. [2023-11-06 22:18:51,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:51,600 INFO L276 IsEmpty]: Start isEmpty. Operand 140209 states and 151220 transitions. [2023-11-06 22:18:51,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-06 22:18:51,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:51,612 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:51,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 22:18:51,613 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:51,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:51,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1738542916, now seen corresponding path program 1 times [2023-11-06 22:18:51,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:51,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092824193] [2023-11-06 22:18:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:51,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:18:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 415 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-06 22:18:52,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:18:52,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092824193] [2023-11-06 22:18:52,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092824193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:18:52,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:18:52,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:18:52,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723653230] [2023-11-06 22:18:52,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:18:52,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:18:52,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:18:52,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:18:52,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:52,169 INFO L87 Difference]: Start difference. First operand 140209 states and 151220 transitions. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:18:56,228 INFO L93 Difference]: Finished difference Result 284229 states and 306120 transitions. [2023-11-06 22:18:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:18:56,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 552 [2023-11-06 22:18:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:18:56,976 INFO L225 Difference]: With dead ends: 284229 [2023-11-06 22:18:56,976 INFO L226 Difference]: Without dead ends: 144872 [2023-11-06 22:18:57,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:18:57,073 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 285 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:18:57,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 665 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-06 22:18:57,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144872 states. [2023-11-06 22:18:58,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144872 to 136783. [2023-11-06 22:18:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136783 states, 136782 states have (on average 1.0707987893143835) internal successors, (146466), 136782 states have internal predecessors, (146466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:59,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136783 states to 136783 states and 146466 transitions. [2023-11-06 22:18:59,566 INFO L78 Accepts]: Start accepts. Automaton has 136783 states and 146466 transitions. Word has length 552 [2023-11-06 22:18:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:18:59,567 INFO L495 AbstractCegarLoop]: Abstraction has 136783 states and 146466 transitions. [2023-11-06 22:18:59,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:18:59,567 INFO L276 IsEmpty]: Start isEmpty. Operand 136783 states and 146466 transitions. [2023-11-06 22:18:59,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2023-11-06 22:18:59,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:18:59,577 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:18:59,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-06 22:18:59,578 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:18:59,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:18:59,578 INFO L85 PathProgramCache]: Analyzing trace with hash -882095651, now seen corresponding path program 1 times [2023-11-06 22:18:59,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:18:59,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803554627] [2023-11-06 22:18:59,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:18:59,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:18:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 647 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-06 22:19:00,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:00,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803554627] [2023-11-06 22:19:00,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803554627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:00,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:00,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:19:00,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118463320] [2023-11-06 22:19:00,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:00,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:19:00,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:00,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:19:00,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:19:00,355 INFO L87 Difference]: Start difference. First operand 136783 states and 146466 transitions. Second operand has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:05,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:19:05,180 INFO L93 Difference]: Finished difference Result 278239 states and 297757 transitions. [2023-11-06 22:19:05,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:19:05,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 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 558 [2023-11-06 22:19:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:19:05,763 INFO L225 Difference]: With dead ends: 278239 [2023-11-06 22:19:05,764 INFO L226 Difference]: Without dead ends: 142308 [2023-11-06 22:19:05,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:19:05,848 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 721 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2526 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 2708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:19:05,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 704 Invalid, 2708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2526 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-06 22:19:05,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142308 states. [2023-11-06 22:19:07,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142308 to 140608. [2023-11-06 22:19:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140608 states, 140607 states have (on average 1.0690150561494094) internal successors, (150311), 140607 states have internal predecessors, (150311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140608 states to 140608 states and 150311 transitions. [2023-11-06 22:19:08,508 INFO L78 Accepts]: Start accepts. Automaton has 140608 states and 150311 transitions. Word has length 558 [2023-11-06 22:19:08,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:19:08,509 INFO L495 AbstractCegarLoop]: Abstraction has 140608 states and 150311 transitions. [2023-11-06 22:19:08,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:19:08,510 INFO L276 IsEmpty]: Start isEmpty. Operand 140608 states and 150311 transitions. [2023-11-06 22:19:08,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2023-11-06 22:19:08,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:19:08,544 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:19:08,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-06 22:19:08,544 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:19:08,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:19:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1830267507, now seen corresponding path program 1 times [2023-11-06 22:19:08,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:19:08,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511738204] [2023-11-06 22:19:08,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:19:08,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:19:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:19:09,269 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 794 proven. 0 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2023-11-06 22:19:09,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:19:09,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511738204] [2023-11-06 22:19:09,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511738204] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:19:09,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:19:09,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:19:09,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179189936] [2023-11-06 22:19:09,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:19:09,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:19:09,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:19:09,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:19:09,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:19:09,273 INFO L87 Difference]: Start difference. First operand 140608 states and 150311 transitions. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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)