./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem16_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/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_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem16_label02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/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_02637694-787b-41ca-b2fb-90b1a68a3cd9/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 540d5c4f35934e1abeb0886e7556fb35e244ff515a3f2091d43a3a4e43fb5fb5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:08:58,897 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:08:59,015 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:08:59,023 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:08:59,024 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:08:59,061 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:08:59,062 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:08:59,062 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:08:59,063 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:08:59,068 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:08:59,070 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:08:59,070 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:08:59,070 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:08:59,072 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:08:59,073 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:08:59,073 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:08:59,073 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:08:59,074 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:08:59,074 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:08:59,074 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:08:59,075 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:08:59,075 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:08:59,076 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:08:59,076 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:08:59,076 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:08:59,077 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:08:59,078 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:08:59,078 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:08:59,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:59,079 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:08:59,080 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:08:59,080 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:08:59,081 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:08:59,081 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:08:59,081 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:08:59,081 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:08:59,081 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:08:59,082 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:08:59,082 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:08:59,082 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_02637694-787b-41ca-b2fb-90b1a68a3cd9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 540d5c4f35934e1abeb0886e7556fb35e244ff515a3f2091d43a3a4e43fb5fb5 [2023-11-06 23:08:59,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:08:59,401 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:08:59,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:08:59,406 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:08:59,406 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:08:59,408 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/eca-rers2012/Problem16_label02.c [2023-11-06 23:09:02,576 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:09:03,061 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:09:03,062 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/sv-benchmarks/c/eca-rers2012/Problem16_label02.c [2023-11-06 23:09:03,094 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/data/9bafab7e3/031fa3b22d8f4f3e8991c332beed8a13/FLAGa99c74968 [2023-11-06 23:09:03,117 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/data/9bafab7e3/031fa3b22d8f4f3e8991c332beed8a13 [2023-11-06 23:09:03,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:09:03,127 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:09:03,131 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:09:03,131 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:09:03,138 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:09:03,139 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:09:03" (1/1) ... [2023-11-06 23:09:03,141 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38410402 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:03, skipping insertion in model container [2023-11-06 23:09:03,142 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:09:03" (1/1) ... [2023-11-06 23:09:03,251 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:09:03,521 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_02637694-787b-41ca-b2fb-90b1a68a3cd9/sv-benchmarks/c/eca-rers2012/Problem16_label02.c[6387,6400] [2023-11-06 23:09:04,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:09:04,020 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:09:04,049 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_02637694-787b-41ca-b2fb-90b1a68a3cd9/sv-benchmarks/c/eca-rers2012/Problem16_label02.c[6387,6400] [2023-11-06 23:09:04,359 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:09:04,384 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:09:04,385 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:04 WrapperNode [2023-11-06 23:09:04,385 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:09:04,386 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:09:04,386 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:09:04,386 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:09:04,394 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:04" (1/1) ... [2023-11-06 23:09:04,426 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:04" (1/1) ... [2023-11-06 23:09:04,566 INFO L138 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1769 [2023-11-06 23:09:04,567 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:09:04,568 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:09:04,568 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:09:04,568 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:09:04,577 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:04" (1/1) ... [2023-11-06 23:09:04,578 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:04" (1/1) ... [2023-11-06 23:09:04,592 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:04" (1/1) ... [2023-11-06 23:09:04,593 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:04" (1/1) ... [2023-11-06 23:09:04,708 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:04" (1/1) ... [2023-11-06 23:09:04,747 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:04" (1/1) ... [2023-11-06 23:09:04,771 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:04" (1/1) ... [2023-11-06 23:09:04,781 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:04" (1/1) ... [2023-11-06 23:09:04,805 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:09:04,807 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:09:04,807 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:09:04,807 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:09:04,808 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:04" (1/1) ... [2023-11-06 23:09:04,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:09:04,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:04,842 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:09:04,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:09:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:09:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:09:04,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:09:04,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:09:04,959 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:09:04,961 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:09:07,496 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:09:07,520 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:09:07,520 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 23:09:07,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:09:07 BoogieIcfgContainer [2023-11-06 23:09:07,525 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:09:07,528 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:09:07,528 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:09:07,531 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:09:07,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:09:03" (1/3) ... [2023-11-06 23:09:07,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35032c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:09:07, skipping insertion in model container [2023-11-06 23:09:07,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:04" (2/3) ... [2023-11-06 23:09:07,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35032c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:09:07, skipping insertion in model container [2023-11-06 23:09:07,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:09:07" (3/3) ... [2023-11-06 23:09:07,539 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem16_label02.c [2023-11-06 23:09:07,560 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:09:07,560 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:09:07,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:09:07,651 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;@40ab93e8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:09:07,652 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:09:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 23:09:07,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-06 23:09:07,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:07,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:07,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:07,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:07,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1818267785, now seen corresponding path program 1 times [2023-11-06 23:09:07,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:07,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494141110] [2023-11-06 23:09:07,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:07,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:08,096 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 23:09:08,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:08,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494141110] [2023-11-06 23:09:08,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494141110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:08,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:08,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:09:08,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273378973] [2023-11-06 23:09:08,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:08,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:08,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:08,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:08,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:08,156 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 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 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 23:09:11,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:11,052 INFO L93 Difference]: Finished difference Result 1137 states and 2118 transitions. [2023-11-06 23:09:11,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:11,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 61 [2023-11-06 23:09:11,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:11,079 INFO L225 Difference]: With dead ends: 1137 [2023-11-06 23:09:11,079 INFO L226 Difference]: Without dead ends: 662 [2023-11-06 23:09:11,085 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 23:09:11,089 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 323 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:11,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 114 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-06 23:09:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2023-11-06 23:09:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2023-11-06 23:09:11,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.7004538577912254) internal successors, (1124), 661 states have internal predecessors, (1124), 0 states have call successors, (0), 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 23:09:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1124 transitions. [2023-11-06 23:09:11,173 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1124 transitions. Word has length 61 [2023-11-06 23:09:11,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:11,174 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 1124 transitions. [2023-11-06 23:09:11,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 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 23:09:11,174 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1124 transitions. [2023-11-06 23:09:11,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-06 23:09:11,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:11,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:11,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:09:11,182 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:11,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:11,182 INFO L85 PathProgramCache]: Analyzing trace with hash 804089513, now seen corresponding path program 1 times [2023-11-06 23:09:11,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:11,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208344840] [2023-11-06 23:09:11,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:11,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:11,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:11,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208344840] [2023-11-06 23:09:11,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208344840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:11,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:11,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:09:11,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514978031] [2023-11-06 23:09:11,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:11,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:11,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:11,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:11,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:11,460 INFO L87 Difference]: Start difference. First operand 662 states and 1124 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 23:09:13,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:13,373 INFO L93 Difference]: Finished difference Result 1980 states and 3367 transitions. [2023-11-06 23:09:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:13,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2023-11-06 23:09:13,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:13,389 INFO L225 Difference]: With dead ends: 1980 [2023-11-06 23:09:13,390 INFO L226 Difference]: Without dead ends: 1320 [2023-11-06 23:09:13,393 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 23:09:13,395 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 343 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:13,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 77 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-06 23:09:13,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2023-11-06 23:09:13,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1320. [2023-11-06 23:09:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1320 states, 1319 states have (on average 1.620166793025019) internal successors, (2137), 1319 states have internal predecessors, (2137), 0 states have call successors, (0), 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 23:09:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 2137 transitions. [2023-11-06 23:09:13,458 INFO L78 Accepts]: Start accepts. Automaton has 1320 states and 2137 transitions. Word has length 127 [2023-11-06 23:09:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:13,459 INFO L495 AbstractCegarLoop]: Abstraction has 1320 states and 2137 transitions. [2023-11-06 23:09:13,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 23:09:13,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1320 states and 2137 transitions. [2023-11-06 23:09:13,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-06 23:09:13,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:13,463 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:13,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:09:13,464 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:13,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash 601628073, now seen corresponding path program 1 times [2023-11-06 23:09:13,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:13,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479614501] [2023-11-06 23:09:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:13,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:13,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:13,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479614501] [2023-11-06 23:09:13,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479614501] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:13,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:13,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:09:13,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764279394] [2023-11-06 23:09:13,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:13,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:13,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:13,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:13,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:13,696 INFO L87 Difference]: Start difference. First operand 1320 states and 2137 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 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 23:09:15,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:15,490 INFO L93 Difference]: Finished difference Result 3296 states and 5285 transitions. [2023-11-06 23:09:15,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:15,491 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2023-11-06 23:09:15,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:15,502 INFO L225 Difference]: With dead ends: 3296 [2023-11-06 23:09:15,502 INFO L226 Difference]: Without dead ends: 1978 [2023-11-06 23:09:15,505 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 23:09:15,506 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 381 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:15,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 155 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 23:09:15,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2023-11-06 23:09:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2023-11-06 23:09:15,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.3323216995447649) internal successors, (2634), 1977 states have internal predecessors, (2634), 0 states have call successors, (0), 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 23:09:15,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2634 transitions. [2023-11-06 23:09:15,565 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2634 transitions. Word has length 128 [2023-11-06 23:09:15,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:15,566 INFO L495 AbstractCegarLoop]: Abstraction has 1978 states and 2634 transitions. [2023-11-06 23:09:15,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 2 states have internal predecessors, (128), 0 states have call successors, (0), 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 23:09:15,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2634 transitions. [2023-11-06 23:09:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-11-06 23:09:15,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:15,571 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:09:15,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:09:15,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:15,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:15,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1357591119, now seen corresponding path program 1 times [2023-11-06 23:09:15,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:15,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813979683] [2023-11-06 23:09:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:15,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:15,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:15,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813979683] [2023-11-06 23:09:15,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813979683] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:15,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:15,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:09:15,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829141946] [2023-11-06 23:09:15,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:15,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:15,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:15,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:15,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:15,960 INFO L87 Difference]: Start difference. First operand 1978 states and 2634 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 23:09:17,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:17,726 INFO L93 Difference]: Finished difference Result 5928 states and 7897 transitions. [2023-11-06 23:09:17,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:17,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 220 [2023-11-06 23:09:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:17,749 INFO L225 Difference]: With dead ends: 5928 [2023-11-06 23:09:17,749 INFO L226 Difference]: Without dead ends: 3952 [2023-11-06 23:09:17,753 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 23:09:17,764 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 183 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:17,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 257 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 23:09:17,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2023-11-06 23:09:17,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3952. [2023-11-06 23:09:17,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 1.2171602126044039) internal successors, (4809), 3951 states have internal predecessors, (4809), 0 states have call successors, (0), 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 23:09:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 4809 transitions. [2023-11-06 23:09:17,875 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 4809 transitions. Word has length 220 [2023-11-06 23:09:17,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:17,877 INFO L495 AbstractCegarLoop]: Abstraction has 3952 states and 4809 transitions. [2023-11-06 23:09:17,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 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 23:09:17,878 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 4809 transitions. [2023-11-06 23:09:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2023-11-06 23:09:17,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:17,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:09:17,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:09:17,886 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:17,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:17,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1544183199, now seen corresponding path program 1 times [2023-11-06 23:09:17,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:17,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606923941] [2023-11-06 23:09:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:17,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:18,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:18,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606923941] [2023-11-06 23:09:18,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606923941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:18,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450895995] [2023-11-06 23:09:18,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:18,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:18,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:18,478 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:18,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:09:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:18,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:09:18,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:19,167 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-11-06 23:09:19,167 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:19,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450895995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:19,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:09:19,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-06 23:09:19,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681956078] [2023-11-06 23:09:19,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:19,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:19,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:19,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:19,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:09:19,171 INFO L87 Difference]: Start difference. First operand 3952 states and 4809 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 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 23:09:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:20,767 INFO L93 Difference]: Finished difference Result 5270 states and 6254 transitions. [2023-11-06 23:09:20,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:20,768 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2023-11-06 23:09:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:20,795 INFO L225 Difference]: With dead ends: 5270 [2023-11-06 23:09:20,795 INFO L226 Difference]: Without dead ends: 5268 [2023-11-06 23:09:20,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:09:20,798 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 109 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:20,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 158 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-06 23:09:20,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5268 states. [2023-11-06 23:09:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5268 to 4610. [2023-11-06 23:09:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 1.2013451941852897) internal successors, (5537), 4609 states have internal predecessors, (5537), 0 states have call successors, (0), 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 23:09:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 5537 transitions. [2023-11-06 23:09:20,917 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 5537 transitions. Word has length 304 [2023-11-06 23:09:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:20,918 INFO L495 AbstractCegarLoop]: Abstraction has 4610 states and 5537 transitions. [2023-11-06 23:09:20,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 2 states have internal predecessors, (247), 0 states have call successors, (0), 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 23:09:20,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 5537 transitions. [2023-11-06 23:09:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2023-11-06 23:09:20,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:20,928 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:09:20,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 23:09:21,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:21,134 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:21,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:21,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2079847568, now seen corresponding path program 1 times [2023-11-06 23:09:21,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:21,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557810990] [2023-11-06 23:09:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:21,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-06 23:09:22,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:22,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557810990] [2023-11-06 23:09:22,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557810990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:22,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:22,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:22,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007483808] [2023-11-06 23:09:22,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:22,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:22,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:22,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:22,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:22,115 INFO L87 Difference]: Start difference. First operand 4610 states and 5537 transitions. Second operand has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 23:09:24,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:24,091 INFO L93 Difference]: Finished difference Result 9560 states and 11426 transitions. [2023-11-06 23:09:24,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:09:24,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 413 [2023-11-06 23:09:24,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:24,118 INFO L225 Difference]: With dead ends: 9560 [2023-11-06 23:09:24,119 INFO L226 Difference]: Without dead ends: 4952 [2023-11-06 23:09:24,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:09:24,125 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 173 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:24,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 366 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-06 23:09:24,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4952 states. [2023-11-06 23:09:24,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4952 to 4939. [2023-11-06 23:09:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 4938 states have (on average 1.1891454029971649) internal successors, (5872), 4938 states have internal predecessors, (5872), 0 states have call successors, (0), 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 23:09:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 5872 transitions. [2023-11-06 23:09:24,245 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 5872 transitions. Word has length 413 [2023-11-06 23:09:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:24,246 INFO L495 AbstractCegarLoop]: Abstraction has 4939 states and 5872 transitions. [2023-11-06 23:09:24,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.75) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 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 23:09:24,246 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 5872 transitions. [2023-11-06 23:09:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-06 23:09:24,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:24,258 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:09:24,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:09:24,259 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:24,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:24,259 INFO L85 PathProgramCache]: Analyzing trace with hash -832462339, now seen corresponding path program 1 times [2023-11-06 23:09:24,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:24,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642600104] [2023-11-06 23:09:24,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:24,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-11-06 23:09:25,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:25,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642600104] [2023-11-06 23:09:25,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642600104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:25,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177903131] [2023-11-06 23:09:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:25,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:25,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:25,541 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:25,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:09:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:25,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:09:25,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:26,638 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-11-06 23:09:26,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:09:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-11-06 23:09:33,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177903131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:09:33,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:09:33,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-06 23:09:33,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794171913] [2023-11-06 23:09:33,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:09:33,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:09:33,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:33,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:09:33,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:09:33,348 INFO L87 Difference]: Start difference. First operand 4939 states and 5872 transitions. Second operand has 8 states, 8 states have (on average 111.5) internal successors, (892), 7 states have internal predecessors, (892), 0 states have call successors, (0), 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 23:09:38,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-06 23:09:44,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:44,518 INFO L93 Difference]: Finished difference Result 16785 states and 20176 transitions. [2023-11-06 23:09:44,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:09:44,519 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 111.5) internal successors, (892), 7 states have internal predecessors, (892), 0 states have call successors, (0), 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 475 [2023-11-06 23:09:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:44,580 INFO L225 Difference]: With dead ends: 16785 [2023-11-06 23:09:44,581 INFO L226 Difference]: Without dead ends: 12177 [2023-11-06 23:09:44,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 945 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:09:44,589 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1372 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 4283 mSolverCounterSat, 1719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 6002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1719 IncrementalHoareTripleChecker+Valid, 4283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:44,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1372 Valid, 44 Invalid, 6002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1719 Valid, 4283 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2023-11-06 23:09:44,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2023-11-06 23:09:44,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 10861. [2023-11-06 23:09:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10861 states, 10860 states have (on average 1.1918968692449357) internal successors, (12944), 10860 states have internal predecessors, (12944), 0 states have call successors, (0), 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 23:09:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10861 states to 10861 states and 12944 transitions. [2023-11-06 23:09:44,871 INFO L78 Accepts]: Start accepts. Automaton has 10861 states and 12944 transitions. Word has length 475 [2023-11-06 23:09:44,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:44,872 INFO L495 AbstractCegarLoop]: Abstraction has 10861 states and 12944 transitions. [2023-11-06 23:09:44,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 111.5) internal successors, (892), 7 states have internal predecessors, (892), 0 states have call successors, (0), 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 23:09:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 10861 states and 12944 transitions. [2023-11-06 23:09:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2023-11-06 23:09:44,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:44,892 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-06 23:09:44,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 23:09:45,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 23:09:45,098 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:45,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:45,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1917555893, now seen corresponding path program 1 times [2023-11-06 23:09:45,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:45,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398846237] [2023-11-06 23:09:45,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:45,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 488 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-11-06 23:09:45,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:45,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398846237] [2023-11-06 23:09:45,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398846237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:45,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:45,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:45,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145235011] [2023-11-06 23:09:45,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:45,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:45,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:45,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:45,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:45,741 INFO L87 Difference]: Start difference. First operand 10861 states and 12944 transitions. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 23:09:47,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:47,651 INFO L93 Difference]: Finished difference Result 25339 states and 30660 transitions. [2023-11-06 23:09:47,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:47,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 562 [2023-11-06 23:09:47,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:47,687 INFO L225 Difference]: With dead ends: 25339 [2023-11-06 23:09:47,687 INFO L226 Difference]: Without dead ends: 14809 [2023-11-06 23:09:47,699 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 23:09:47,700 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 171 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:47,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 595 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-06 23:09:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14809 states. [2023-11-06 23:09:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14809 to 14151. [2023-11-06 23:09:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14151 states, 14150 states have (on average 1.1548409893992932) internal successors, (16341), 14150 states have internal predecessors, (16341), 0 states have call successors, (0), 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 23:09:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14151 states to 14151 states and 16341 transitions. [2023-11-06 23:09:48,035 INFO L78 Accepts]: Start accepts. Automaton has 14151 states and 16341 transitions. Word has length 562 [2023-11-06 23:09:48,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:48,036 INFO L495 AbstractCegarLoop]: Abstraction has 14151 states and 16341 transitions. [2023-11-06 23:09:48,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 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 23:09:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 14151 states and 16341 transitions. [2023-11-06 23:09:48,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2023-11-06 23:09:48,058 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:48,059 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:09:48,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 23:09:48,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:48,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:48,063 INFO L85 PathProgramCache]: Analyzing trace with hash 788273314, now seen corresponding path program 1 times [2023-11-06 23:09:48,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:48,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730648511] [2023-11-06 23:09:48,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:48,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 472 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2023-11-06 23:09:49,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:49,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730648511] [2023-11-06 23:09:49,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730648511] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:49,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:49,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:09:49,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142009873] [2023-11-06 23:09:49,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:49,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:09:49,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:49,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:09:49,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:09:49,033 INFO L87 Difference]: Start difference. First operand 14151 states and 16341 transitions. Second operand has 7 states, 7 states have (on average 56.57142857142857) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 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 23:09:51,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:51,413 INFO L93 Difference]: Finished difference Result 27047 states and 31373 transitions. [2023-11-06 23:09:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:09:51,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.57142857142857) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 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 566 [2023-11-06 23:09:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:51,438 INFO L225 Difference]: With dead ends: 27047 [2023-11-06 23:09:51,438 INFO L226 Difference]: Without dead ends: 13248 [2023-11-06 23:09:51,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:09:51,452 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 310 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1971 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 1971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:51,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [310 Valid, 281 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 1971 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-06 23:09:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13248 states. [2023-11-06 23:09:51,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13248 to 11908. [2023-11-06 23:09:51,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11908 states, 11907 states have (on average 1.0703787687914672) internal successors, (12745), 11907 states have internal predecessors, (12745), 0 states have call successors, (0), 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 23:09:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11908 states to 11908 states and 12745 transitions. [2023-11-06 23:09:51,658 INFO L78 Accepts]: Start accepts. Automaton has 11908 states and 12745 transitions. Word has length 566 [2023-11-06 23:09:51,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:51,662 INFO L495 AbstractCegarLoop]: Abstraction has 11908 states and 12745 transitions. [2023-11-06 23:09:51,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.57142857142857) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 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 23:09:51,663 INFO L276 IsEmpty]: Start isEmpty. Operand 11908 states and 12745 transitions. [2023-11-06 23:09:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 699 [2023-11-06 23:09:51,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:51,678 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:09:51,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:09:51,678 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:51,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:51,679 INFO L85 PathProgramCache]: Analyzing trace with hash -854616129, now seen corresponding path program 1 times [2023-11-06 23:09:51,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:51,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630907577] [2023-11-06 23:09:51,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:51,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 902 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2023-11-06 23:09:52,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:52,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630907577] [2023-11-06 23:09:52,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630907577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:52,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:52,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:52,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890076386] [2023-11-06 23:09:52,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:52,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:52,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:52,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:52,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:52,744 INFO L87 Difference]: Start difference. First operand 11908 states and 12745 transitions. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 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 23:09:54,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:54,101 INFO L93 Difference]: Finished difference Result 26775 states and 28794 transitions. [2023-11-06 23:09:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:54,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 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 698 [2023-11-06 23:09:54,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:54,131 INFO L225 Difference]: With dead ends: 26775 [2023-11-06 23:09:54,131 INFO L226 Difference]: Without dead ends: 15198 [2023-11-06 23:09:54,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:54,144 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 228 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:54,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 41 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 23:09:54,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15198 states. [2023-11-06 23:09:54,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15198 to 14869. [2023-11-06 23:09:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14869 states, 14868 states have (on average 1.0737153618509552) internal successors, (15964), 14868 states have internal predecessors, (15964), 0 states have call successors, (0), 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 23:09:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14869 states to 14869 states and 15964 transitions. [2023-11-06 23:09:54,441 INFO L78 Accepts]: Start accepts. Automaton has 14869 states and 15964 transitions. Word has length 698 [2023-11-06 23:09:54,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:54,443 INFO L495 AbstractCegarLoop]: Abstraction has 14869 states and 15964 transitions. [2023-11-06 23:09:54,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 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 23:09:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand 14869 states and 15964 transitions. [2023-11-06 23:09:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 723 [2023-11-06 23:09:54,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:54,456 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:09:54,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-06 23:09:54,456 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:54,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:54,457 INFO L85 PathProgramCache]: Analyzing trace with hash 479289470, now seen corresponding path program 1 times [2023-11-06 23:09:54,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:54,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077796212] [2023-11-06 23:09:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:54,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:54,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 405 trivial. 0 not checked. [2023-11-06 23:09:56,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:56,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077796212] [2023-11-06 23:09:56,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077796212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:56,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:56,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:09:56,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336018118] [2023-11-06 23:09:56,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:56,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:56,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:56,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:56,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:56,162 INFO L87 Difference]: Start difference. First operand 14869 states and 15964 transitions. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 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 23:09:57,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:57,605 INFO L93 Difference]: Finished difference Result 15259 states and 16361 transitions. [2023-11-06 23:09:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:09:57,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 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 722 [2023-11-06 23:09:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:57,628 INFO L225 Difference]: With dead ends: 15259 [2023-11-06 23:09:57,628 INFO L226 Difference]: Without dead ends: 15198 [2023-11-06 23:09:57,632 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 23:09:57,633 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 505 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:57,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 17 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-06 23:09:57,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15198 states. [2023-11-06 23:09:57,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15198 to 14869. [2023-11-06 23:09:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14869 states, 14868 states have (on average 1.0733118105999462) internal successors, (15958), 14868 states have internal predecessors, (15958), 0 states have call successors, (0), 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 23:09:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14869 states to 14869 states and 15958 transitions. [2023-11-06 23:09:57,947 INFO L78 Accepts]: Start accepts. Automaton has 14869 states and 15958 transitions. Word has length 722 [2023-11-06 23:09:57,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:57,948 INFO L495 AbstractCegarLoop]: Abstraction has 14869 states and 15958 transitions. [2023-11-06 23:09:57,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 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 23:09:57,948 INFO L276 IsEmpty]: Start isEmpty. Operand 14869 states and 15958 transitions. [2023-11-06 23:09:57,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 809 [2023-11-06 23:09:57,971 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:57,972 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:09:57,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 23:09:57,972 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:57,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:57,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1199607507, now seen corresponding path program 1 times [2023-11-06 23:09:57,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:57,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546957717] [2023-11-06 23:09:57,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:57,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 786 proven. 156 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2023-11-06 23:10:00,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:00,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546957717] [2023-11-06 23:10:00,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546957717] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:00,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859968209] [2023-11-06 23:10:00,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:00,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:00,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:00,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:00,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:10:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:00,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:10:00,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 1003 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2023-11-06 23:10:00,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:00,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859968209] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:00,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:10:00,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-11-06 23:10:00,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530640541] [2023-11-06 23:10:00,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:00,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:00,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:00,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:00,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:10:00,692 INFO L87 Difference]: Start difference. First operand 14869 states and 15958 transitions. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 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 23:10:01,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:01,945 INFO L93 Difference]: Finished difference Result 32697 states and 35219 transitions. [2023-11-06 23:10:01,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:01,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 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 808 [2023-11-06 23:10:01,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:01,974 INFO L225 Difference]: With dead ends: 32697 [2023-11-06 23:10:01,974 INFO L226 Difference]: Without dead ends: 18159 [2023-11-06 23:10:01,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 807 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:10:01,990 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 173 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:01,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 452 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 23:10:02,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18159 states. [2023-11-06 23:10:02,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18159 to 17501. [2023-11-06 23:10:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17501 states, 17500 states have (on average 1.0630857142857142) internal successors, (18604), 17500 states have internal predecessors, (18604), 0 states have call successors, (0), 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 23:10:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17501 states to 17501 states and 18604 transitions. [2023-11-06 23:10:02,269 INFO L78 Accepts]: Start accepts. Automaton has 17501 states and 18604 transitions. Word has length 808 [2023-11-06 23:10:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:02,271 INFO L495 AbstractCegarLoop]: Abstraction has 17501 states and 18604 transitions. [2023-11-06 23:10:02,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 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 23:10:02,271 INFO L276 IsEmpty]: Start isEmpty. Operand 17501 states and 18604 transitions. [2023-11-06 23:10:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2023-11-06 23:10:02,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:02,289 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:02,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:02,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 23:10:02,496 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:02,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:02,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2142221905, now seen corresponding path program 1 times [2023-11-06 23:10:02,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:02,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365246624] [2023-11-06 23:10:02,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:02,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 118 proven. 542 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-11-06 23:10:04,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:04,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365246624] [2023-11-06 23:10:04,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365246624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:04,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660156680] [2023-11-06 23:10:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:04,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:04,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:04,005 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:04,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:10:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:04,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 941 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:10:04,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2023-11-06 23:10:04,514 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:04,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660156680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:04,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:10:04,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-06 23:10:04,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820439866] [2023-11-06 23:10:04,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:04,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:04,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:04,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:04,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:10:04,518 INFO L87 Difference]: Start difference. First operand 17501 states and 18604 transitions. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 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 23:10:05,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:05,653 INFO L93 Difference]: Finished difference Result 34671 states and 36875 transitions. [2023-11-06 23:10:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:05,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 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 821 [2023-11-06 23:10:05,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:05,673 INFO L225 Difference]: With dead ends: 34671 [2023-11-06 23:10:05,673 INFO L226 Difference]: Without dead ends: 17501 [2023-11-06 23:10:05,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 825 GetRequests, 821 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:10:05,683 INFO L413 NwaCegarLoop]: 375 mSDtfsCounter, 306 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:05,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 381 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 23:10:05,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17501 states. [2023-11-06 23:10:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17501 to 17172. [2023-11-06 23:10:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17172 states, 17171 states have (on average 1.0557335041639975) internal successors, (18128), 17171 states have internal predecessors, (18128), 0 states have call successors, (0), 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 23:10:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17172 states to 17172 states and 18128 transitions. [2023-11-06 23:10:05,924 INFO L78 Accepts]: Start accepts. Automaton has 17172 states and 18128 transitions. Word has length 821 [2023-11-06 23:10:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:05,925 INFO L495 AbstractCegarLoop]: Abstraction has 17172 states and 18128 transitions. [2023-11-06 23:10:05,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 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 23:10:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 17172 states and 18128 transitions. [2023-11-06 23:10:05,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2023-11-06 23:10:05,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:05,946 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:05,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:06,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:10:06,156 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:06,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:06,157 INFO L85 PathProgramCache]: Analyzing trace with hash -38982213, now seen corresponding path program 1 times [2023-11-06 23:10:06,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:06,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375076726] [2023-11-06 23:10:06,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:06,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 941 proven. 100 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2023-11-06 23:10:07,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375076726] [2023-11-06 23:10:07,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375076726] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:07,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958923864] [2023-11-06 23:10:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:07,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:07,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:07,635 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:07,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:10:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:07,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 1010 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:10:07,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 249 proven. 851 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2023-11-06 23:10:11,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1318 backedges. 308 proven. 792 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2023-11-06 23:10:14,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958923864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:14,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:14,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2023-11-06 23:10:14,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770531783] [2023-11-06 23:10:14,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:14,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:10:14,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:14,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:10:14,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:10:14,354 INFO L87 Difference]: Start difference. First operand 17172 states and 18128 transitions. Second operand has 13 states, 13 states have (on average 118.0) internal successors, (1534), 12 states have internal predecessors, (1534), 0 states have call successors, (0), 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 23:10:25,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:25,514 INFO L93 Difference]: Finished difference Result 44466 states and 46800 transitions. [2023-11-06 23:10:25,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-06 23:10:25,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 118.0) internal successors, (1534), 12 states have internal predecessors, (1534), 0 states have call successors, (0), 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 869 [2023-11-06 23:10:25,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:25,541 INFO L225 Difference]: With dead ends: 44466 [2023-11-06 23:10:25,541 INFO L226 Difference]: Without dead ends: 27505 [2023-11-06 23:10:25,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1765 GetRequests, 1729 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2023-11-06 23:10:25,553 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 4064 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 12252 mSolverCounterSat, 947 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4064 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 13199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 947 IncrementalHoareTripleChecker+Valid, 12252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:25,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4064 Valid, 140 Invalid, 13199 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [947 Valid, 12252 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2023-11-06 23:10:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27505 states. [2023-11-06 23:10:25,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27505 to 22107. [2023-11-06 23:10:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22107 states, 22106 states have (on average 1.0499864290237944) internal successors, (23211), 22106 states have internal predecessors, (23211), 0 states have call successors, (0), 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 23:10:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22107 states to 22107 states and 23211 transitions. [2023-11-06 23:10:26,015 INFO L78 Accepts]: Start accepts. Automaton has 22107 states and 23211 transitions. Word has length 869 [2023-11-06 23:10:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:26,016 INFO L495 AbstractCegarLoop]: Abstraction has 22107 states and 23211 transitions. [2023-11-06 23:10:26,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 118.0) internal successors, (1534), 12 states have internal predecessors, (1534), 0 states have call successors, (0), 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 23:10:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 22107 states and 23211 transitions. [2023-11-06 23:10:26,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 972 [2023-11-06 23:10:26,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:26,041 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:26,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:26,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:10:26,242 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:26,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:26,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1660609336, now seen corresponding path program 1 times [2023-11-06 23:10:26,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:26,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613012842] [2023-11-06 23:10:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:26,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1573 backedges. 1131 proven. 258 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2023-11-06 23:10:27,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613012842] [2023-11-06 23:10:27,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613012842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:27,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194324868] [2023-11-06 23:10:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:27,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:27,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:27,938 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:27,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:10:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:28,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:10:28,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1573 backedges. 938 proven. 202 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2023-11-06 23:10:30,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1573 backedges. 938 proven. 202 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2023-11-06 23:10:32,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194324868] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:32,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:10:32,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-11-06 23:10:32,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781926970] [2023-11-06 23:10:32,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:32,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-06 23:10:32,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:32,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-06 23:10:32,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:10:32,639 INFO L87 Difference]: Start difference. First operand 22107 states and 23211 transitions. Second operand has 12 states, 12 states have (on average 130.58333333333334) internal successors, (1567), 11 states have internal predecessors, (1567), 0 states have call successors, (0), 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 23:10:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:40,247 INFO L93 Difference]: Finished difference Result 44274 states and 46488 transitions. [2023-11-06 23:10:40,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-06 23:10:40,248 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 130.58333333333334) internal successors, (1567), 11 states have internal predecessors, (1567), 0 states have call successors, (0), 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 971 [2023-11-06 23:10:40,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:40,271 INFO L225 Difference]: With dead ends: 44274 [2023-11-06 23:10:40,271 INFO L226 Difference]: Without dead ends: 22498 [2023-11-06 23:10:40,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1967 GetRequests, 1936 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2023-11-06 23:10:40,282 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 3346 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 9400 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3346 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 9839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 9400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:40,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3346 Valid, 118 Invalid, 9839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 9400 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-11-06 23:10:40,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22498 states. [2023-11-06 23:10:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22498 to 21120. [2023-11-06 23:10:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21120 states, 21119 states have (on average 1.045693451394479) internal successors, (22084), 21119 states have internal predecessors, (22084), 0 states have call successors, (0), 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 23:10:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21120 states to 21120 states and 22084 transitions. [2023-11-06 23:10:40,619 INFO L78 Accepts]: Start accepts. Automaton has 21120 states and 22084 transitions. Word has length 971 [2023-11-06 23:10:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:40,620 INFO L495 AbstractCegarLoop]: Abstraction has 21120 states and 22084 transitions. [2023-11-06 23:10:40,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 130.58333333333334) internal successors, (1567), 11 states have internal predecessors, (1567), 0 states have call successors, (0), 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 23:10:40,621 INFO L276 IsEmpty]: Start isEmpty. Operand 21120 states and 22084 transitions. [2023-11-06 23:10:40,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1052 [2023-11-06 23:10:40,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:40,649 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:10:40,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:40,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:10:40,857 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:40,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:40,858 INFO L85 PathProgramCache]: Analyzing trace with hash 484801574, now seen corresponding path program 1 times [2023-11-06 23:10:40,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:40,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754069523] [2023-11-06 23:10:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:40,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 1447 proven. 0 refuted. 0 times theorem prover too weak. 821 trivial. 0 not checked. [2023-11-06 23:10:41,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:41,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754069523] [2023-11-06 23:10:41,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754069523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:41,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:41,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:10:41,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212801530] [2023-11-06 23:10:41,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:41,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:41,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:41,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:41,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:41,829 INFO L87 Difference]: Start difference. First operand 21120 states and 22084 transitions. Second operand has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:43,321 INFO L93 Difference]: Finished difference Result 41909 states and 43835 transitions. [2023-11-06 23:10:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:43,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1051 [2023-11-06 23:10:43,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:43,346 INFO L225 Difference]: With dead ends: 41909 [2023-11-06 23:10:43,346 INFO L226 Difference]: Without dead ends: 21120 [2023-11-06 23:10:43,360 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 23:10:43,361 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 220 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:43,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 447 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 23:10:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21120 states. [2023-11-06 23:10:43,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21120 to 19475. [2023-11-06 23:10:43,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19475 states, 19474 states have (on average 1.0340967443771183) internal successors, (20138), 19474 states have internal predecessors, (20138), 0 states have call successors, (0), 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 23:10:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19475 states to 19475 states and 20138 transitions. [2023-11-06 23:10:43,698 INFO L78 Accepts]: Start accepts. Automaton has 19475 states and 20138 transitions. Word has length 1051 [2023-11-06 23:10:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:43,699 INFO L495 AbstractCegarLoop]: Abstraction has 19475 states and 20138 transitions. [2023-11-06 23:10:43,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:10:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 19475 states and 20138 transitions. [2023-11-06 23:10:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1089 [2023-11-06 23:10:43,717 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:43,718 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:43,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-06 23:10:43,718 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:43,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:43,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1330054839, now seen corresponding path program 1 times [2023-11-06 23:10:43,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:43,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890136146] [2023-11-06 23:10:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:43,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2398 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 2045 trivial. 0 not checked. [2023-11-06 23:10:44,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:44,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890136146] [2023-11-06 23:10:44,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890136146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:44,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:44,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:10:44,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639979389] [2023-11-06 23:10:44,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:44,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:44,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:44,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:44,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:44,544 INFO L87 Difference]: Start difference. First operand 19475 states and 20138 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 23:10:45,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:45,823 INFO L93 Difference]: Finished difference Result 38619 states and 39943 transitions. [2023-11-06 23:10:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:45,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 1088 [2023-11-06 23:10:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:45,844 INFO L225 Difference]: With dead ends: 38619 [2023-11-06 23:10:45,844 INFO L226 Difference]: Without dead ends: 19475 [2023-11-06 23:10:45,854 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 23:10:45,854 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 271 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:45,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 439 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 23:10:45,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19475 states. [2023-11-06 23:10:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19475 to 18817. [2023-11-06 23:10:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18817 states, 18816 states have (on average 1.0257759353741496) internal successors, (19301), 18816 states have internal predecessors, (19301), 0 states have call successors, (0), 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 23:10:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18817 states to 18817 states and 19301 transitions. [2023-11-06 23:10:46,165 INFO L78 Accepts]: Start accepts. Automaton has 18817 states and 19301 transitions. Word has length 1088 [2023-11-06 23:10:46,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:46,166 INFO L495 AbstractCegarLoop]: Abstraction has 18817 states and 19301 transitions. [2023-11-06 23:10:46,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 23:10:46,166 INFO L276 IsEmpty]: Start isEmpty. Operand 18817 states and 19301 transitions. [2023-11-06 23:10:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1201 [2023-11-06 23:10:46,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:46,182 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:10:46,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 23:10:46,183 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:46,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2016459313, now seen corresponding path program 1 times [2023-11-06 23:10:46,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:46,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365056573] [2023-11-06 23:10:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:46,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2427 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 2074 trivial. 0 not checked. [2023-11-06 23:10:47,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:47,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365056573] [2023-11-06 23:10:47,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365056573] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:47,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:47,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:10:47,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952560143] [2023-11-06 23:10:47,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:47,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:10:47,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:47,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:10:47,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:10:47,028 INFO L87 Difference]: Start difference. First operand 18817 states and 19301 transitions. Second operand has 4 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 0 states have call successors, (0), 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 23:10:49,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:49,026 INFO L93 Difference]: Finished difference Result 40288 states and 41317 transitions. [2023-11-06 23:10:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:10:49,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 0 states have call successors, (0), 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 1200 [2023-11-06 23:10:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:49,050 INFO L225 Difference]: With dead ends: 40288 [2023-11-06 23:10:49,050 INFO L226 Difference]: Without dead ends: 20791 [2023-11-06 23:10:49,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:10:49,060 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 605 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 1578 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:49,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 64 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1578 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-06 23:10:49,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20791 states. [2023-11-06 23:10:49,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20791 to 18159. [2023-11-06 23:10:49,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18159 states, 18158 states have (on average 1.0253331864742814) internal successors, (18618), 18158 states have internal predecessors, (18618), 0 states have call successors, (0), 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 23:10:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18159 states to 18159 states and 18618 transitions. [2023-11-06 23:10:49,358 INFO L78 Accepts]: Start accepts. Automaton has 18159 states and 18618 transitions. Word has length 1200 [2023-11-06 23:10:49,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:49,358 INFO L495 AbstractCegarLoop]: Abstraction has 18159 states and 18618 transitions. [2023-11-06 23:10:49,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 98.25) internal successors, (393), 4 states have internal predecessors, (393), 0 states have call successors, (0), 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 23:10:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 18159 states and 18618 transitions. [2023-11-06 23:10:49,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1256 [2023-11-06 23:10:49,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:49,377 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:49,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 23:10:49,377 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:49,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:49,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1267286605, now seen corresponding path program 1 times [2023-11-06 23:10:49,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:49,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133593802] [2023-11-06 23:10:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:49,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3242 backedges. 1921 proven. 0 refuted. 0 times theorem prover too weak. 1321 trivial. 0 not checked. [2023-11-06 23:10:50,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:50,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133593802] [2023-11-06 23:10:50,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133593802] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:50,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:50,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:10:50,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290010736] [2023-11-06 23:10:50,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:50,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:50,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:50,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:50,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:50,137 INFO L87 Difference]: Start difference. First operand 18159 states and 18618 transitions. Second operand has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 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 23:10:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:51,514 INFO L93 Difference]: Finished difference Result 41580 states and 42656 transitions. [2023-11-06 23:10:51,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:51,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 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 1255 [2023-11-06 23:10:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:51,540 INFO L225 Difference]: With dead ends: 41580 [2023-11-06 23:10:51,540 INFO L226 Difference]: Without dead ends: 21778 [2023-11-06 23:10:51,550 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 23:10:51,551 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 207 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:51,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 433 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 23:10:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21778 states. [2023-11-06 23:10:51,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21778 to 21120. [2023-11-06 23:10:51,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21120 states, 21119 states have (on average 1.0192717458212983) internal successors, (21526), 21119 states have internal predecessors, (21526), 0 states have call successors, (0), 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 23:10:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21120 states to 21120 states and 21526 transitions. [2023-11-06 23:10:52,015 INFO L78 Accepts]: Start accepts. Automaton has 21120 states and 21526 transitions. Word has length 1255 [2023-11-06 23:10:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:52,017 INFO L495 AbstractCegarLoop]: Abstraction has 21120 states and 21526 transitions. [2023-11-06 23:10:52,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 states have internal predecessors, (632), 0 states have call successors, (0), 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 23:10:52,018 INFO L276 IsEmpty]: Start isEmpty. Operand 21120 states and 21526 transitions. [2023-11-06 23:10:52,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1530 [2023-11-06 23:10:52,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:52,058 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:52,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-06 23:10:52,058 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:52,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:52,059 INFO L85 PathProgramCache]: Analyzing trace with hash 158822930, now seen corresponding path program 1 times [2023-11-06 23:10:52,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:52,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896986468] [2023-11-06 23:10:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:52,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5206 backedges. 2562 proven. 0 refuted. 0 times theorem prover too weak. 2644 trivial. 0 not checked. [2023-11-06 23:10:53,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:53,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896986468] [2023-11-06 23:10:53,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896986468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:53,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:53,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:10:53,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952474786] [2023-11-06 23:10:53,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:53,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:53,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:53,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:53,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:53,135 INFO L87 Difference]: Start difference. First operand 21120 states and 21526 transitions. Second operand has 3 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 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 23:10:54,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:54,477 INFO L93 Difference]: Finished difference Result 43883 states and 44765 transitions. [2023-11-06 23:10:54,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:54,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 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 1529 [2023-11-06 23:10:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:54,500 INFO L225 Difference]: With dead ends: 43883 [2023-11-06 23:10:54,500 INFO L226 Difference]: Without dead ends: 21120 [2023-11-06 23:10:54,511 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 23:10:54,512 INFO L413 NwaCegarLoop]: 413 mSDtfsCounter, 205 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:54,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 419 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 23:10:54,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21120 states. [2023-11-06 23:10:54,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21120 to 19804. [2023-11-06 23:10:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19804 states, 19803 states have (on average 1.0173711053880725) internal successors, (20147), 19803 states have internal predecessors, (20147), 0 states have call successors, (0), 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 23:10:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19804 states to 19804 states and 20147 transitions. [2023-11-06 23:10:54,950 INFO L78 Accepts]: Start accepts. Automaton has 19804 states and 20147 transitions. Word has length 1529 [2023-11-06 23:10:54,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:54,952 INFO L495 AbstractCegarLoop]: Abstraction has 19804 states and 20147 transitions. [2023-11-06 23:10:54,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 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 23:10:54,952 INFO L276 IsEmpty]: Start isEmpty. Operand 19804 states and 20147 transitions. [2023-11-06 23:10:54,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1557 [2023-11-06 23:10:54,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:54,993 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:10:54,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-06 23:10:54,993 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:54,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:54,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1952310525, now seen corresponding path program 1 times [2023-11-06 23:10:54,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:54,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165883469] [2023-11-06 23:10:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:54,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:57,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4281 backedges. 2813 proven. 35 refuted. 0 times theorem prover too weak. 1433 trivial. 0 not checked. [2023-11-06 23:10:57,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:57,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165883469] [2023-11-06 23:10:57,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165883469] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:57,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889797463] [2023-11-06 23:10:57,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:57,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:57,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:57,477 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:57,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:10:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:58,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:10:58,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:01,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4281 backedges. 2813 proven. 35 refuted. 0 times theorem prover too weak. 1433 trivial. 0 not checked. [2023-11-06 23:11:01,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4281 backedges. 2526 proven. 322 refuted. 0 times theorem prover too weak. 1433 trivial. 0 not checked. [2023-11-06 23:11:07,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889797463] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:07,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:07,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-11-06 23:11:07,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639810131] [2023-11-06 23:11:07,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:07,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:11:07,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:07,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:11:07,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:11:07,397 INFO L87 Difference]: Start difference. First operand 19804 states and 20147 transitions. Second operand has 6 states, 6 states have (on average 181.83333333333334) internal successors, (1091), 6 states have internal predecessors, (1091), 0 states have call successors, (0), 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 23:11:11,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:11,115 INFO L93 Difference]: Finished difference Result 39326 states and 40010 transitions. [2023-11-06 23:11:11,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:11:11,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 181.83333333333334) internal successors, (1091), 6 states have internal predecessors, (1091), 0 states have call successors, (0), 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 1556 [2023-11-06 23:11:11,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:11,136 INFO L225 Difference]: With dead ends: 39326 [2023-11-06 23:11:11,136 INFO L226 Difference]: Without dead ends: 19853 [2023-11-06 23:11:11,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3120 GetRequests, 3113 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:11:11,145 INFO L413 NwaCegarLoop]: 420 mSDtfsCounter, 399 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4002 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 4103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:11,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 582 Invalid, 4103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4002 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-06 23:11:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19853 states. [2023-11-06 23:11:11,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19853 to 19804. [2023-11-06 23:11:11,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19804 states, 19803 states have (on average 1.016916628793617) internal successors, (20138), 19803 states have internal predecessors, (20138), 0 states have call successors, (0), 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 23:11:11,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19804 states to 19804 states and 20138 transitions. [2023-11-06 23:11:11,407 INFO L78 Accepts]: Start accepts. Automaton has 19804 states and 20138 transitions. Word has length 1556 [2023-11-06 23:11:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:11,408 INFO L495 AbstractCegarLoop]: Abstraction has 19804 states and 20138 transitions. [2023-11-06 23:11:11,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 181.83333333333334) internal successors, (1091), 6 states have internal predecessors, (1091), 0 states have call successors, (0), 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 23:11:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 19804 states and 20138 transitions. [2023-11-06 23:11:11,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1588 [2023-11-06 23:11:11,433 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:11,434 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-06 23:11:11,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:11,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:11,640 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:11,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:11,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1620524572, now seen corresponding path program 1 times [2023-11-06 23:11:11,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:11,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105121754] [2023-11-06 23:11:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:11,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4312 backedges. 2591 proven. 288 refuted. 0 times theorem prover too weak. 1433 trivial. 0 not checked. [2023-11-06 23:11:15,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:15,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105121754] [2023-11-06 23:11:15,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105121754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:15,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996599933] [2023-11-06 23:11:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:15,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:15,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:15,864 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:15,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:11:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:16,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 1828 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:11:16,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4312 backedges. 2677 proven. 464 refuted. 0 times theorem prover too weak. 1171 trivial. 0 not checked. [2023-11-06 23:11:19,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4312 backedges. 2677 proven. 464 refuted. 0 times theorem prover too weak. 1171 trivial. 0 not checked. [2023-11-06 23:11:22,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996599933] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:22,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:11:22,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-11-06 23:11:22,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770657800] [2023-11-06 23:11:22,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:22,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 23:11:22,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:22,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 23:11:22,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-06 23:11:22,171 INFO L87 Difference]: Start difference. First operand 19804 states and 20138 transitions. Second operand has 13 states, 13 states have (on average 148.53846153846155) internal successors, (1931), 13 states have internal predecessors, (1931), 0 states have call successors, (0), 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 23:11:35,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:35,157 INFO L93 Difference]: Finished difference Result 41720 states and 42413 transitions. [2023-11-06 23:11:35,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-06 23:11:35,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 148.53846153846155) internal successors, (1931), 13 states have internal predecessors, (1931), 0 states have call successors, (0), 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 1587 [2023-11-06 23:11:35,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:35,181 INFO L225 Difference]: With dead ends: 41720 [2023-11-06 23:11:35,181 INFO L226 Difference]: Without dead ends: 22188 [2023-11-06 23:11:35,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3210 GetRequests, 3175 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=1068, Unknown=0, NotChecked=0, Total=1332 [2023-11-06 23:11:35,193 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 2521 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 20797 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2521 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 21187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 20797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:35,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2521 Valid, 283 Invalid, 21187 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [390 Valid, 20797 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2023-11-06 23:11:35,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22188 states. [2023-11-06 23:11:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22188 to 20462. [2023-11-06 23:11:35,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20462 states, 20461 states have (on average 1.0154440154440154) internal successors, (20777), 20461 states have internal predecessors, (20777), 0 states have call successors, (0), 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 23:11:35,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20462 states to 20462 states and 20777 transitions. [2023-11-06 23:11:35,655 INFO L78 Accepts]: Start accepts. Automaton has 20462 states and 20777 transitions. Word has length 1587 [2023-11-06 23:11:35,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:35,656 INFO L495 AbstractCegarLoop]: Abstraction has 20462 states and 20777 transitions. [2023-11-06 23:11:35,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 148.53846153846155) internal successors, (1931), 13 states have internal predecessors, (1931), 0 states have call successors, (0), 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 23:11:35,657 INFO L276 IsEmpty]: Start isEmpty. Operand 20462 states and 20777 transitions. [2023-11-06 23:11:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2222 [2023-11-06 23:11:35,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:35,707 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2023-11-06 23:11:35,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:35,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-06 23:11:35,908 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:35,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:35,909 INFO L85 PathProgramCache]: Analyzing trace with hash 509097690, now seen corresponding path program 1 times [2023-11-06 23:11:35,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:35,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868125778] [2023-11-06 23:11:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:35,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:36,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10068 backedges. 6104 proven. 0 refuted. 0 times theorem prover too weak. 3964 trivial. 0 not checked. [2023-11-06 23:11:38,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:38,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868125778] [2023-11-06 23:11:38,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868125778] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:38,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:38,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:11:38,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505309426] [2023-11-06 23:11:38,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:38,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:11:38,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:11:38,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:11:38,782 INFO L87 Difference]: Start difference. First operand 20462 states and 20777 transitions. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 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 23:11:39,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:39,937 INFO L93 Difference]: Finished difference Result 40922 states and 41555 transitions. [2023-11-06 23:11:39,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:11:39,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 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 2221 [2023-11-06 23:11:39,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:39,959 INFO L225 Difference]: With dead ends: 40922 [2023-11-06 23:11:39,959 INFO L226 Difference]: Without dead ends: 20791 [2023-11-06 23:11:39,969 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 23:11:39,970 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 224 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:39,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 435 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 23:11:39,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20791 states. [2023-11-06 23:11:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20791 to 20133. [2023-11-06 23:11:40,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20133 states, 20132 states have (on average 1.0156467315716273) internal successors, (20447), 20132 states have internal predecessors, (20447), 0 states have call successors, (0), 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 23:11:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20133 states to 20133 states and 20447 transitions. [2023-11-06 23:11:40,272 INFO L78 Accepts]: Start accepts. Automaton has 20133 states and 20447 transitions. Word has length 2221 [2023-11-06 23:11:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:40,273 INFO L495 AbstractCegarLoop]: Abstraction has 20133 states and 20447 transitions. [2023-11-06 23:11:40,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 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 23:11:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 20133 states and 20447 transitions. [2023-11-06 23:11:40,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2288 [2023-11-06 23:11:40,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:40,315 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:40,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-06 23:11:40,316 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:40,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:40,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1337090136, now seen corresponding path program 1 times [2023-11-06 23:11:40,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:40,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987285319] [2023-11-06 23:11:40,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:40,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9402 backedges. 6026 proven. 0 refuted. 0 times theorem prover too weak. 3376 trivial. 0 not checked. [2023-11-06 23:11:43,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:43,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987285319] [2023-11-06 23:11:43,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987285319] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:43,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:43,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:11:43,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100871741] [2023-11-06 23:11:43,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:43,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:11:43,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:43,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:11:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:11:43,560 INFO L87 Difference]: Start difference. First operand 20133 states and 20447 transitions. Second operand has 4 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 0 states have call successors, (0), 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 23:11:45,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:45,082 INFO L93 Difference]: Finished difference Result 39949 states and 40575 transitions. [2023-11-06 23:11:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:11:45,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 0 states have call successors, (0), 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 2287 [2023-11-06 23:11:45,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:45,099 INFO L225 Difference]: With dead ends: 39949 [2023-11-06 23:11:45,099 INFO L226 Difference]: Without dead ends: 20147 [2023-11-06 23:11:45,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:11:45,107 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 263 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:45,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 438 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-06 23:11:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20147 states. [2023-11-06 23:11:45,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20147 to 19804. [2023-11-06 23:11:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19804 states, 19803 states have (on average 1.0152502146139475) internal successors, (20105), 19803 states have internal predecessors, (20105), 0 states have call successors, (0), 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 23:11:45,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19804 states to 19804 states and 20105 transitions. [2023-11-06 23:11:45,338 INFO L78 Accepts]: Start accepts. Automaton has 19804 states and 20105 transitions. Word has length 2287 [2023-11-06 23:11:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:45,339 INFO L495 AbstractCegarLoop]: Abstraction has 19804 states and 20105 transitions. [2023-11-06 23:11:45,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 0 states have call successors, (0), 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 23:11:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 19804 states and 20105 transitions. [2023-11-06 23:11:45,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2317 [2023-11-06 23:11:45,378 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:45,379 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:11:45,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-06 23:11:45,379 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:45,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:45,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1916731438, now seen corresponding path program 1 times [2023-11-06 23:11:45,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:45,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378209973] [2023-11-06 23:11:45,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:45,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 11178 backedges. 5495 proven. 2076 refuted. 0 times theorem prover too weak. 3607 trivial. 0 not checked. [2023-11-06 23:11:48,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:48,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378209973] [2023-11-06 23:11:48,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378209973] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:48,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145620979] [2023-11-06 23:11:48,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:48,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:48,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:48,824 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:48,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:11:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:49,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 2667 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:11:49,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:49,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11178 backedges. 2283 proven. 0 refuted. 0 times theorem prover too weak. 8895 trivial. 0 not checked. [2023-11-06 23:11:49,973 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:49,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145620979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:49,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:11:49,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-06 23:11:49,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559134786] [2023-11-06 23:11:49,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:49,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:11:49,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:49,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:11:49,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:11:49,977 INFO L87 Difference]: Start difference. First operand 19804 states and 20105 transitions. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 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 23:11:51,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:51,253 INFO L93 Difference]: Finished difference Result 39276 states and 39876 transitions. [2023-11-06 23:11:51,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:11:51,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 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 2316 [2023-11-06 23:11:51,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:51,273 INFO L225 Difference]: With dead ends: 39276 [2023-11-06 23:11:51,274 INFO L226 Difference]: Without dead ends: 19803 [2023-11-06 23:11:51,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2323 GetRequests, 2319 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:11:51,282 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 219 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:51,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 54 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 23:11:51,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19803 states. [2023-11-06 23:11:51,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19803 to 19474. [2023-11-06 23:11:51,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19474 states, 19473 states have (on average 1.0119139321111281) internal successors, (19705), 19473 states have internal predecessors, (19705), 0 states have call successors, (0), 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 23:11:51,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19474 states to 19474 states and 19705 transitions. [2023-11-06 23:11:51,638 INFO L78 Accepts]: Start accepts. Automaton has 19474 states and 19705 transitions. Word has length 2316 [2023-11-06 23:11:51,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:51,639 INFO L495 AbstractCegarLoop]: Abstraction has 19474 states and 19705 transitions. [2023-11-06 23:11:51,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 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 23:11:51,640 INFO L276 IsEmpty]: Start isEmpty. Operand 19474 states and 19705 transitions. [2023-11-06 23:11:51,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2394 [2023-11-06 23:11:51,688 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:51,690 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2023-11-06 23:11:51,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-06 23:11:51,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:51,892 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:51,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:51,892 INFO L85 PathProgramCache]: Analyzing trace with hash -954482011, now seen corresponding path program 1 times [2023-11-06 23:11:51,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:51,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406060095] [2023-11-06 23:11:51,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:51,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:56,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11447 backedges. 8326 proven. 486 refuted. 0 times theorem prover too weak. 2635 trivial. 0 not checked. [2023-11-06 23:11:56,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:56,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406060095] [2023-11-06 23:11:56,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406060095] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:56,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297133887] [2023-11-06 23:11:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:56,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:56,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:56,862 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:56,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:11:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:57,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 2742 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:11:57,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 11447 backedges. 6917 proven. 0 refuted. 0 times theorem prover too weak. 4530 trivial. 0 not checked. [2023-11-06 23:11:58,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:58,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297133887] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:58,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:11:58,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-11-06 23:11:58,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338170779] [2023-11-06 23:11:58,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:58,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:11:58,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:58,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:11:58,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:11:58,651 INFO L87 Difference]: Start difference. First operand 19474 states and 19705 transitions. Second operand has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 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 23:11:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:59,917 INFO L93 Difference]: Finished difference Result 38946 states and 39408 transitions. [2023-11-06 23:11:59,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:11:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 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 2393 [2023-11-06 23:11:59,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:59,938 INFO L225 Difference]: With dead ends: 38946 [2023-11-06 23:11:59,938 INFO L226 Difference]: Without dead ends: 19803 [2023-11-06 23:11:59,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2400 GetRequests, 2394 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:11:59,948 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 123 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:59,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 423 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 23:11:59,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19803 states. [2023-11-06 23:12:00,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19803 to 19474. [2023-11-06 23:12:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19474 states, 19473 states have (on average 1.0117085194885225) internal successors, (19701), 19473 states have internal predecessors, (19701), 0 states have call successors, (0), 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 23:12:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19474 states to 19474 states and 19701 transitions. [2023-11-06 23:12:00,251 INFO L78 Accepts]: Start accepts. Automaton has 19474 states and 19701 transitions. Word has length 2393 [2023-11-06 23:12:00,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:00,253 INFO L495 AbstractCegarLoop]: Abstraction has 19474 states and 19701 transitions. [2023-11-06 23:12:00,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 0 states have call successors, (0), 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 23:12:00,253 INFO L276 IsEmpty]: Start isEmpty. Operand 19474 states and 19701 transitions. [2023-11-06 23:12:00,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2470 [2023-11-06 23:12:00,292 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:00,293 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:00,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:00,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-06 23:12:00,494 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:00,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:00,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1019327256, now seen corresponding path program 1 times [2023-11-06 23:12:00,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:00,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418052412] [2023-11-06 23:12:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:00,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13074 backedges. 4367 proven. 0 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2023-11-06 23:12:02,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:02,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418052412] [2023-11-06 23:12:02,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418052412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:02,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:12:02,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:12:02,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760663910] [2023-11-06 23:12:02,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:02,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:12:02,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:02,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:12:02,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:12:02,060 INFO L87 Difference]: Start difference. First operand 19474 states and 19701 transitions. Second operand has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 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 23:12:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:03,188 INFO L93 Difference]: Finished difference Result 40591 states and 41067 transitions. [2023-11-06 23:12:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:12:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 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 2469 [2023-11-06 23:12:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:03,210 INFO L225 Difference]: With dead ends: 40591 [2023-11-06 23:12:03,210 INFO L226 Difference]: Without dead ends: 21448 [2023-11-06 23:12:03,218 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 23:12:03,219 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 198 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:03,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 417 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 23:12:03,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21448 states. [2023-11-06 23:12:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21448 to 18816. [2023-11-06 23:12:03,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18816 states, 18815 states have (on average 1.011799096465586) internal successors, (19037), 18815 states have internal predecessors, (19037), 0 states have call successors, (0), 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 23:12:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18816 states to 18816 states and 19037 transitions. [2023-11-06 23:12:03,588 INFO L78 Accepts]: Start accepts. Automaton has 18816 states and 19037 transitions. Word has length 2469 [2023-11-06 23:12:03,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:03,589 INFO L495 AbstractCegarLoop]: Abstraction has 18816 states and 19037 transitions. [2023-11-06 23:12:03,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 225.33333333333334) internal successors, (676), 3 states have internal predecessors, (676), 0 states have call successors, (0), 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 23:12:03,590 INFO L276 IsEmpty]: Start isEmpty. Operand 18816 states and 19037 transitions. [2023-11-06 23:12:03,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2610 [2023-11-06 23:12:03,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:03,639 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:12:03,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-06 23:12:03,640 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:03,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:03,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1341586274, now seen corresponding path program 1 times [2023-11-06 23:12:03,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:03,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092203326] [2023-11-06 23:12:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:03,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13418 backedges. 4318 proven. 134 refuted. 0 times theorem prover too weak. 8966 trivial. 0 not checked. [2023-11-06 23:12:08,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:08,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092203326] [2023-11-06 23:12:08,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092203326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:08,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410566933] [2023-11-06 23:12:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:08,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:08,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:08,158 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:08,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:12:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:09,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 2951 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 23:12:09,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:09,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13418 backedges. 3030 proven. 0 refuted. 0 times theorem prover too weak. 10388 trivial. 0 not checked. [2023-11-06 23:12:09,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:12:09,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410566933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:12:09,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:12:09,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-11-06 23:12:09,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159681115] [2023-11-06 23:12:09,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:12:09,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:12:09,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:12:09,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:12:09,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:12:09,624 INFO L87 Difference]: Start difference. First operand 18816 states and 19037 transitions. Second operand has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 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 23:12:11,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:11,631 INFO L93 Difference]: Finished difference Result 20851 states and 21090 transitions. [2023-11-06 23:12:11,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:12:11,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 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 2609 [2023-11-06 23:12:11,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:11,655 INFO L225 Difference]: With dead ends: 20851 [2023-11-06 23:12:11,655 INFO L226 Difference]: Without dead ends: 20790 [2023-11-06 23:12:11,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2613 GetRequests, 2608 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:12:11,661 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 362 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:11,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 29 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1506 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-06 23:12:11,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20790 states. [2023-11-06 23:12:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20790 to 18487. [2023-11-06 23:12:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18487 states, 18486 states have (on average 1.0118468029860435) internal successors, (18705), 18486 states have internal predecessors, (18705), 0 states have call successors, (0), 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 23:12:11,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18487 states to 18487 states and 18705 transitions. [2023-11-06 23:12:11,919 INFO L78 Accepts]: Start accepts. Automaton has 18487 states and 18705 transitions. Word has length 2609 [2023-11-06 23:12:11,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:12:11,921 INFO L495 AbstractCegarLoop]: Abstraction has 18487 states and 18705 transitions. [2023-11-06 23:12:11,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 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 23:12:11,922 INFO L276 IsEmpty]: Start isEmpty. Operand 18487 states and 18705 transitions. [2023-11-06 23:12:12,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2805 [2023-11-06 23:12:12,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:12:12,041 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:12:12,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:12:12,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-06 23:12:12,246 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:12:12,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:12:12,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1482410570, now seen corresponding path program 1 times [2023-11-06 23:12:12,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:12:12,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158951100] [2023-11-06 23:12:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:12,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:12:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15082 backedges. 6252 proven. 5961 refuted. 0 times theorem prover too weak. 2869 trivial. 0 not checked. [2023-11-06 23:12:22,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:12:22,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158951100] [2023-11-06 23:12:22,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158951100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:12:22,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560467982] [2023-11-06 23:12:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:12:22,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:12:22,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:12:22,010 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:12:22,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02637694-787b-41ca-b2fb-90b1a68a3cd9/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:12:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:12:22,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 3171 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:12:22,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:12:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15082 backedges. 10567 proven. 60 refuted. 0 times theorem prover too weak. 4455 trivial. 0 not checked. [2023-11-06 23:12:26,521 INFO L327 TraceCheckSpWp]: Computing backward predicates...