./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label26.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_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/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_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label26.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/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_9b75470b-d095-44e8-bee9-e3234d9aab79/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 f7d9d441800fd040181450c0920264f1b228689c17b8db097e43b17ec5ad46cc --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:08:16,881 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:08:16,973 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:08:16,978 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:08:16,979 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:08:17,003 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:08:17,004 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:08:17,005 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:08:17,006 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:08:17,007 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:08:17,007 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:08:17,008 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:08:17,009 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:08:17,009 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:08:17,010 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:08:17,010 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:08:17,011 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:08:17,011 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:08:17,012 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:08:17,012 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:08:17,013 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:08:17,014 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:08:17,014 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:08:17,016 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:08:17,016 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:08:17,017 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:08:17,018 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:08:17,018 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:08:17,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:17,019 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:08:17,020 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:08:17,021 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:08:17,021 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:08:17,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:08:17,022 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:08:17,022 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:08:17,022 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:08:17,022 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:08:17,022 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:08:17,023 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_9b75470b-d095-44e8-bee9-e3234d9aab79/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7d9d441800fd040181450c0920264f1b228689c17b8db097e43b17ec5ad46cc [2023-11-06 23:08:17,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:08:17,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:08:17,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:08:17,372 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:08:17,373 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:08:17,375 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/eca-rers2012/Problem13_label26.c [2023-11-06 23:08:20,484 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:08:21,095 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:08:21,096 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/sv-benchmarks/c/eca-rers2012/Problem13_label26.c [2023-11-06 23:08:21,138 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/data/eb6e1db43/a1117240d80f4b22a301ae3263cd41c8/FLAG31e631ba5 [2023-11-06 23:08:21,158 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/data/eb6e1db43/a1117240d80f4b22a301ae3263cd41c8 [2023-11-06 23:08:21,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:08:21,170 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:08:21,174 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:08:21,174 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:08:21,179 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:08:21,180 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:08:21" (1/1) ... [2023-11-06 23:08:21,181 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@364effe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:21, skipping insertion in model container [2023-11-06 23:08:21,181 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:08:21" (1/1) ... [2023-11-06 23:08:21,399 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:08:21,717 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_9b75470b-d095-44e8-bee9-e3234d9aab79/sv-benchmarks/c/eca-rers2012/Problem13_label26.c[5554,5567] [2023-11-06 23:08:23,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:08:23,023 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:08:23,054 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_9b75470b-d095-44e8-bee9-e3234d9aab79/sv-benchmarks/c/eca-rers2012/Problem13_label26.c[5554,5567] [2023-11-06 23:08:23,805 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:08:23,836 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:08:23,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:23 WrapperNode [2023-11-06 23:08:23,837 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:08:23,839 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:08:23,839 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:08:23,839 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:08:23,847 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:23" (1/1) ... [2023-11-06 23:08:23,924 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:23" (1/1) ... [2023-11-06 23:08:24,558 INFO L138 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5584 [2023-11-06 23:08:24,559 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:08:24,560 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:08:24,560 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:08:24,561 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:08:24,572 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:23" (1/1) ... [2023-11-06 23:08:24,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:23" (1/1) ... [2023-11-06 23:08:24,755 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:23" (1/1) ... [2023-11-06 23:08:24,755 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:23" (1/1) ... [2023-11-06 23:08:25,054 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:23" (1/1) ... [2023-11-06 23:08:25,100 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:23" (1/1) ... [2023-11-06 23:08:25,154 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:23" (1/1) ... [2023-11-06 23:08:25,173 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:23" (1/1) ... [2023-11-06 23:08:25,240 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:08:25,241 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:08:25,241 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:08:25,241 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:08:25,242 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:23" (1/1) ... [2023-11-06 23:08:25,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:08:25,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:08:25,273 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:08:25,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:08:25,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:08:25,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:08:25,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:08:25,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:08:25,388 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:08:25,390 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:08:32,169 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:08:32,186 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:08:32,187 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 23:08:32,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:08:32 BoogieIcfgContainer [2023-11-06 23:08:32,191 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:08:32,194 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:08:32,194 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:08:32,197 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:08:32,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:08:21" (1/3) ... [2023-11-06 23:08:32,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ffe2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:08:32, skipping insertion in model container [2023-11-06 23:08:32,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:08:23" (2/3) ... [2023-11-06 23:08:32,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73ffe2fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:08:32, skipping insertion in model container [2023-11-06 23:08:32,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:08:32" (3/3) ... [2023-11-06 23:08:32,201 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem13_label26.c [2023-11-06 23:08:32,220 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:08:32,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:08:32,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:08:32,323 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;@1ca57d5d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:08:32,324 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:08:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states 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 23:08:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-06 23:08:32,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:32,346 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] [2023-11-06 23:08:32,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:32,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:32,354 INFO L85 PathProgramCache]: Analyzing trace with hash 323974986, now seen corresponding path program 1 times [2023-11-06 23:08:32,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:32,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346739365] [2023-11-06 23:08:32,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:32,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:32,766 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 23:08:32,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:32,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346739365] [2023-11-06 23:08:32,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346739365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:32,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:32,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:08:32,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037160540] [2023-11-06 23:08:32,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:32,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:32,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:32,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:32,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:32,810 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 23:08:39,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:39,039 INFO L93 Difference]: Finished difference Result 3082 states and 5689 transitions. [2023-11-06 23:08:39,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:39,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2023-11-06 23:08:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:39,083 INFO L225 Difference]: With dead ends: 3082 [2023-11-06 23:08:39,083 INFO L226 Difference]: Without dead ends: 1899 [2023-11-06 23:08:39,090 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 23:08:39,095 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 1001 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1001 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 3554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:39,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1001 Valid, 641 Invalid, 3554 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [599 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-06 23:08:39,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2023-11-06 23:08:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1894. [2023-11-06 23:08:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 1.7374537770734284) internal successors, (3289), 1893 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states 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 23:08:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3289 transitions. [2023-11-06 23:08:39,256 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3289 transitions. Word has length 38 [2023-11-06 23:08:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:39,256 INFO L495 AbstractCegarLoop]: Abstraction has 1894 states and 3289 transitions. [2023-11-06 23:08:39,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states 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 23:08:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3289 transitions. [2023-11-06 23:08:39,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-06 23:08:39,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:39,262 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:08:39,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:08:39,263 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:39,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:39,264 INFO L85 PathProgramCache]: Analyzing trace with hash -2086094830, now seen corresponding path program 1 times [2023-11-06 23:08:39,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:39,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773908708] [2023-11-06 23:08:39,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:39,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:39,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:39,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773908708] [2023-11-06 23:08:39,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773908708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:39,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:39,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:08:39,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994125398] [2023-11-06 23:08:39,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:39,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:39,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:39,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:39,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:39,666 INFO L87 Difference]: Start difference. First operand 1894 states and 3289 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 23:08:45,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:45,288 INFO L93 Difference]: Finished difference Result 5384 states and 9441 transitions. [2023-11-06 23:08:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:45,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2023-11-06 23:08:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:45,313 INFO L225 Difference]: With dead ends: 5384 [2023-11-06 23:08:45,314 INFO L226 Difference]: Without dead ends: 3492 [2023-11-06 23:08:45,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:45,319 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 922 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:45,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 1013 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-06 23:08:45,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2023-11-06 23:08:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3491. [2023-11-06 23:08:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3490 states have (on average 1.5383954154727795) internal successors, (5369), 3490 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states 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 23:08:45,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 5369 transitions. [2023-11-06 23:08:45,420 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 5369 transitions. Word has length 103 [2023-11-06 23:08:45,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:45,421 INFO L495 AbstractCegarLoop]: Abstraction has 3491 states and 5369 transitions. [2023-11-06 23:08:45,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 23:08:45,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 5369 transitions. [2023-11-06 23:08:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-06 23:08:45,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:45,432 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:08:45,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:08:45,433 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:45,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:45,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1686024781, now seen corresponding path program 1 times [2023-11-06 23:08:45,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:45,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763005006] [2023-11-06 23:08:45,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:45,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:45,632 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:45,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:45,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763005006] [2023-11-06 23:08:45,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763005006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:45,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:45,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:08:45,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615274930] [2023-11-06 23:08:45,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:45,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:45,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:45,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:45,636 INFO L87 Difference]: Start difference. First operand 3491 states and 5369 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 23:08:50,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:50,423 INFO L93 Difference]: Finished difference Result 10169 states and 15700 transitions. [2023-11-06 23:08:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:50,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 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 105 [2023-11-06 23:08:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:50,530 INFO L225 Difference]: With dead ends: 10169 [2023-11-06 23:08:50,532 INFO L226 Difference]: Without dead ends: 6680 [2023-11-06 23:08:50,537 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 23:08:50,539 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 977 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:50,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 847 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-06 23:08:50,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2023-11-06 23:08:50,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6669. [2023-11-06 23:08:50,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6669 states, 6668 states have (on average 1.375224955008998) internal successors, (9170), 6668 states have internal predecessors, (9170), 0 states have call successors, (0), 0 states 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 23:08:50,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6669 states to 6669 states and 9170 transitions. [2023-11-06 23:08:50,702 INFO L78 Accepts]: Start accepts. Automaton has 6669 states and 9170 transitions. Word has length 105 [2023-11-06 23:08:50,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:50,707 INFO L495 AbstractCegarLoop]: Abstraction has 6669 states and 9170 transitions. [2023-11-06 23:08:50,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 23:08:50,708 INFO L276 IsEmpty]: Start isEmpty. Operand 6669 states and 9170 transitions. [2023-11-06 23:08:50,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-06 23:08:50,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:50,713 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:08:50,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:08:50,713 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:50,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:50,721 INFO L85 PathProgramCache]: Analyzing trace with hash -949558913, now seen corresponding path program 1 times [2023-11-06 23:08:50,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:50,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299413242] [2023-11-06 23:08:50,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:50,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:50,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:51,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:51,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299413242] [2023-11-06 23:08:51,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299413242] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:51,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:51,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:08:51,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240945529] [2023-11-06 23:08:51,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:51,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:51,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:51,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:51,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:51,389 INFO L87 Difference]: Start difference. First operand 6669 states and 9170 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 23:08:55,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:08:55,636 INFO L93 Difference]: Finished difference Result 14123 states and 19185 transitions. [2023-11-06 23:08:55,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:08:55,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 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 149 [2023-11-06 23:08:55,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:08:55,667 INFO L225 Difference]: With dead ends: 14123 [2023-11-06 23:08:55,667 INFO L226 Difference]: Without dead ends: 7456 [2023-11-06 23:08:55,676 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 23:08:55,677 INFO L413 NwaCegarLoop]: 1086 mSDtfsCounter, 678 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 2577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:08:55,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1215 Invalid, 2577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-06 23:08:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2023-11-06 23:08:55,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 7456. [2023-11-06 23:08:55,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7456 states, 7455 states have (on average 1.3362843729040912) internal successors, (9962), 7455 states have internal predecessors, (9962), 0 states have call successors, (0), 0 states 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 23:08:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7456 states to 7456 states and 9962 transitions. [2023-11-06 23:08:55,849 INFO L78 Accepts]: Start accepts. Automaton has 7456 states and 9962 transitions. Word has length 149 [2023-11-06 23:08:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:08:55,851 INFO L495 AbstractCegarLoop]: Abstraction has 7456 states and 9962 transitions. [2023-11-06 23:08:55,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 2 states have internal predecessors, (149), 0 states have call successors, (0), 0 states 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 23:08:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 7456 states and 9962 transitions. [2023-11-06 23:08:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-06 23:08:55,855 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:08:55,856 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:08:55,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:08:55,857 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:08:55,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:08:55,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1872251179, now seen corresponding path program 1 times [2023-11-06 23:08:55,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:08:55,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297685984] [2023-11-06 23:08:55,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:08:55,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:08:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:08:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:08:56,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:08:56,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297685984] [2023-11-06 23:08:56,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297685984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:08:56,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:08:56,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:08:56,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280432222] [2023-11-06 23:08:56,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:08:56,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:08:56,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:08:56,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:08:56,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:08:56,129 INFO L87 Difference]: Start difference. First operand 7456 states and 9962 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 23:09:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:00,887 INFO L93 Difference]: Finished difference Result 20416 states and 27798 transitions. [2023-11-06 23:09:00,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:00,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 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 163 [2023-11-06 23:09:00,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:00,952 INFO L225 Difference]: With dead ends: 20416 [2023-11-06 23:09:00,952 INFO L226 Difference]: Without dead ends: 13749 [2023-11-06 23:09:00,961 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 23:09:00,963 INFO L413 NwaCegarLoop]: 1862 mSDtfsCounter, 896 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 3292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:00,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [896 Valid, 2002 Invalid, 3292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-06 23:09:00,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13749 states. [2023-11-06 23:09:01,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13749 to 13744. [2023-11-06 23:09:01,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13744 states, 13743 states have (on average 1.2572946227170196) internal successors, (17279), 13743 states have internal predecessors, (17279), 0 states have call successors, (0), 0 states 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 23:09:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13744 states to 13744 states and 17279 transitions. [2023-11-06 23:09:01,250 INFO L78 Accepts]: Start accepts. Automaton has 13744 states and 17279 transitions. Word has length 163 [2023-11-06 23:09:01,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:01,251 INFO L495 AbstractCegarLoop]: Abstraction has 13744 states and 17279 transitions. [2023-11-06 23:09:01,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states 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 23:09:01,252 INFO L276 IsEmpty]: Start isEmpty. Operand 13744 states and 17279 transitions. [2023-11-06 23:09:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-11-06 23:09:01,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:01,257 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:01,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:09:01,258 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:01,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:01,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1728464337, now seen corresponding path program 1 times [2023-11-06 23:09:01,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:01,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872511056] [2023-11-06 23:09:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:01,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2023-11-06 23:09:01,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:01,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872511056] [2023-11-06 23:09:01,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872511056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:01,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:01,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:09:01,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200005538] [2023-11-06 23:09:01,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:01,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:01,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:01,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:01,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:01,983 INFO L87 Difference]: Start difference. First operand 13744 states and 17279 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 23:09:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:06,477 INFO L93 Difference]: Finished difference Result 23552 states and 30332 transitions. [2023-11-06 23:09:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:06,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 250 [2023-11-06 23:09:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:06,522 INFO L225 Difference]: With dead ends: 23552 [2023-11-06 23:09:06,522 INFO L226 Difference]: Without dead ends: 12966 [2023-11-06 23:09:06,533 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 23:09:06,534 INFO L413 NwaCegarLoop]: 1010 mSDtfsCounter, 726 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 2700 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:06,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 1189 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2700 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-06 23:09:06,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12966 states. [2023-11-06 23:09:06,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12966 to 12957. [2023-11-06 23:09:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12957 states, 12956 states have (on average 1.2713028712565606) internal successors, (16471), 12956 states have internal predecessors, (16471), 0 states have call successors, (0), 0 states 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 23:09:06,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12957 states to 12957 states and 16471 transitions. [2023-11-06 23:09:06,755 INFO L78 Accepts]: Start accepts. Automaton has 12957 states and 16471 transitions. Word has length 250 [2023-11-06 23:09:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:06,756 INFO L495 AbstractCegarLoop]: Abstraction has 12957 states and 16471 transitions. [2023-11-06 23:09:06,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 23:09:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 12957 states and 16471 transitions. [2023-11-06 23:09:06,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-11-06 23:09:06,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:06,765 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, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 23:09:06,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-06 23:09:06,765 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:06,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:06,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2132574918, now seen corresponding path program 1 times [2023-11-06 23:09:06,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:06,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918046652] [2023-11-06 23:09:06,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:06,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 276 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:09:07,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:07,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918046652] [2023-11-06 23:09:07,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918046652] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:07,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:07,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:07,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375605296] [2023-11-06 23:09:07,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:07,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:07,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:07,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:07,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:07,034 INFO L87 Difference]: Start difference. First operand 12957 states and 16471 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states 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 23:09:11,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:11,959 INFO L93 Difference]: Finished difference Result 36153 states and 46429 transitions. [2023-11-06 23:09:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:11,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 274 [2023-11-06 23:09:11,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:12,012 INFO L225 Difference]: With dead ends: 36153 [2023-11-06 23:09:12,013 INFO L226 Difference]: Without dead ends: 23985 [2023-11-06 23:09:12,027 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 23:09:12,028 INFO L413 NwaCegarLoop]: 774 mSDtfsCounter, 890 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 920 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 3296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 920 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:12,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 891 Invalid, 3296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [920 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-06 23:09:12,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23985 states. [2023-11-06 23:09:12,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23985 to 23189. [2023-11-06 23:09:12,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23189 states, 23188 states have (on average 1.2129549767120924) internal successors, (28126), 23188 states have internal predecessors, (28126), 0 states have call successors, (0), 0 states 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 23:09:12,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23189 states to 23189 states and 28126 transitions. [2023-11-06 23:09:12,390 INFO L78 Accepts]: Start accepts. Automaton has 23189 states and 28126 transitions. Word has length 274 [2023-11-06 23:09:12,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:12,391 INFO L495 AbstractCegarLoop]: Abstraction has 23189 states and 28126 transitions. [2023-11-06 23:09:12,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states 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 23:09:12,391 INFO L276 IsEmpty]: Start isEmpty. Operand 23189 states and 28126 transitions. [2023-11-06 23:09:12,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2023-11-06 23:09:12,397 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:12,398 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:12,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-06 23:09:12,399 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:12,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:12,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1480343591, now seen corresponding path program 1 times [2023-11-06 23:09:12,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:12,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87842721] [2023-11-06 23:09:12,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:12,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 71 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:09:14,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:14,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87842721] [2023-11-06 23:09:14,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87842721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:14,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528746286] [2023-11-06 23:09:14,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:14,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:14,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:14,084 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:14,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:09:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:14,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:09:14,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:14,414 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-11-06 23:09:14,414 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:14,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528746286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:14,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:09:14,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-06 23:09:14,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948094934] [2023-11-06 23:09:14,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:14,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:14,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:14,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:14,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:09:14,418 INFO L87 Difference]: Start difference. First operand 23189 states and 28126 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 23:09:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:18,776 INFO L93 Difference]: Finished difference Result 45587 states and 55457 transitions. [2023-11-06 23:09:18,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:18,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 279 [2023-11-06 23:09:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:18,816 INFO L225 Difference]: With dead ends: 45587 [2023-11-06 23:09:18,816 INFO L226 Difference]: Without dead ends: 23187 [2023-11-06 23:09:18,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:09:18,835 INFO L413 NwaCegarLoop]: 1361 mSDtfsCounter, 1169 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 2917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:18,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1169 Valid, 1444 Invalid, 2917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-06 23:09:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23187 states. [2023-11-06 23:09:19,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23187 to 23186. [2023-11-06 23:09:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23186 states, 23185 states have (on average 1.1656674574078068) internal successors, (27026), 23185 states have internal predecessors, (27026), 0 states have call successors, (0), 0 states 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 23:09:19,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23186 states to 23186 states and 27026 transitions. [2023-11-06 23:09:19,180 INFO L78 Accepts]: Start accepts. Automaton has 23186 states and 27026 transitions. Word has length 279 [2023-11-06 23:09:19,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:19,181 INFO L495 AbstractCegarLoop]: Abstraction has 23186 states and 27026 transitions. [2023-11-06 23:09:19,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states 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 23:09:19,182 INFO L276 IsEmpty]: Start isEmpty. Operand 23186 states and 27026 transitions. [2023-11-06 23:09:19,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-06 23:09:19,190 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:19,191 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-11-06 23:09:19,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:19,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:19,399 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:19,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:19,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2088185386, now seen corresponding path program 1 times [2023-11-06 23:09:19,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:19,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591084911] [2023-11-06 23:09:19,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:19,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:19,730 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-11-06 23:09:19,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:19,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591084911] [2023-11-06 23:09:19,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591084911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:19,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:19,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:19,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422603145] [2023-11-06 23:09:19,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:19,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:19,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:19,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:19,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:19,734 INFO L87 Difference]: Start difference. First operand 23186 states and 27026 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:25,245 INFO L93 Difference]: Finished difference Result 57396 states and 67689 transitions. [2023-11-06 23:09:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:25,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 329 [2023-11-06 23:09:25,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:25,298 INFO L225 Difference]: With dead ends: 57396 [2023-11-06 23:09:25,298 INFO L226 Difference]: Without dead ends: 34999 [2023-11-06 23:09:25,313 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 23:09:25,314 INFO L413 NwaCegarLoop]: 1803 mSDtfsCounter, 825 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 3271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 722 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:25,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 1946 Invalid, 3271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [722 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-06 23:09:25,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34999 states. [2023-11-06 23:09:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34999 to 34208. [2023-11-06 23:09:25,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34208 states, 34207 states have (on average 1.132253632297483) internal successors, (38731), 34207 states have internal predecessors, (38731), 0 states have call successors, (0), 0 states 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 23:09:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34208 states to 34208 states and 38731 transitions. [2023-11-06 23:09:25,819 INFO L78 Accepts]: Start accepts. Automaton has 34208 states and 38731 transitions. Word has length 329 [2023-11-06 23:09:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:25,820 INFO L495 AbstractCegarLoop]: Abstraction has 34208 states and 38731 transitions. [2023-11-06 23:09:25,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 23:09:25,821 INFO L276 IsEmpty]: Start isEmpty. Operand 34208 states and 38731 transitions. [2023-11-06 23:09:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2023-11-06 23:09:25,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:25,832 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, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:09:25,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 23:09:25,833 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:25,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:25,833 INFO L85 PathProgramCache]: Analyzing trace with hash -863340189, now seen corresponding path program 1 times [2023-11-06 23:09:25,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:25,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115408921] [2023-11-06 23:09:25,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:25,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 200 proven. 113 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:09:27,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:27,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115408921] [2023-11-06 23:09:27,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115408921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:27,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001847735] [2023-11-06 23:09:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:27,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:27,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:27,537 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:27,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:09:27,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:27,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:09:27,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-11-06 23:09:27,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:27,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001847735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:27,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:09:27,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-06 23:09:27,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147433391] [2023-11-06 23:09:27,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:27,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:27,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:27,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:27,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:09:27,887 INFO L87 Difference]: Start difference. First operand 34208 states and 38731 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 23:09:32,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:32,431 INFO L93 Difference]: Finished difference Result 67618 states and 76660 transitions. [2023-11-06 23:09:32,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:32,432 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 344 [2023-11-06 23:09:32,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:32,473 INFO L225 Difference]: With dead ends: 67618 [2023-11-06 23:09:32,474 INFO L226 Difference]: Without dead ends: 34199 [2023-11-06 23:09:32,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:09:32,490 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 1076 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:32,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1076 Valid, 814 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-06 23:09:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34199 states. [2023-11-06 23:09:32,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34199 to 34198. [2023-11-06 23:09:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34198 states, 34197 states have (on average 1.096704389273913) internal successors, (37504), 34197 states have internal predecessors, (37504), 0 states have call successors, (0), 0 states 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 23:09:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34198 states to 34198 states and 37504 transitions. [2023-11-06 23:09:32,930 INFO L78 Accepts]: Start accepts. Automaton has 34198 states and 37504 transitions. Word has length 344 [2023-11-06 23:09:32,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:32,931 INFO L495 AbstractCegarLoop]: Abstraction has 34198 states and 37504 transitions. [2023-11-06 23:09:32,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 0 states have call successors, (0), 0 states 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 23:09:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 34198 states and 37504 transitions. [2023-11-06 23:09:32,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2023-11-06 23:09:32,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:32,945 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, 4, 4, 4, 4, 4, 4, 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, 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 23:09:32,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:33,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:09:33,153 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:33,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:33,154 INFO L85 PathProgramCache]: Analyzing trace with hash 692024033, now seen corresponding path program 1 times [2023-11-06 23:09:33,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:33,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368874497] [2023-11-06 23:09:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:33,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:33,533 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 462 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-11-06 23:09:33,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:33,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368874497] [2023-11-06 23:09:33,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368874497] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:33,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:33,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:33,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704973334] [2023-11-06 23:09:33,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:33,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:33,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:33,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:33,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:33,537 INFO L87 Difference]: Start difference. First operand 34198 states and 37504 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 23:09:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:43,044 INFO L93 Difference]: Finished difference Result 119762 states and 131663 transitions. [2023-11-06 23:09:43,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:09:43,045 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2023-11-06 23:09:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:43,132 INFO L225 Difference]: With dead ends: 119762 [2023-11-06 23:09:43,132 INFO L226 Difference]: Without dead ends: 86353 [2023-11-06 23:09:43,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:43,157 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 1713 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 6030 mSolverCounterSat, 1082 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1713 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 7112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1082 IncrementalHoareTripleChecker+Valid, 6030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:43,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1713 Valid, 780 Invalid, 7112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1082 Valid, 6030 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2023-11-06 23:09:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86353 states. [2023-11-06 23:09:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86353 to 83862. [2023-11-06 23:09:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83862 states, 83861 states have (on average 1.087823899071082) internal successors, (91226), 83861 states have internal predecessors, (91226), 0 states have call successors, (0), 0 states 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 23:09:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83862 states to 83862 states and 91226 transitions. [2023-11-06 23:09:44,343 INFO L78 Accepts]: Start accepts. Automaton has 83862 states and 91226 transitions. Word has length 386 [2023-11-06 23:09:44,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:44,343 INFO L495 AbstractCegarLoop]: Abstraction has 83862 states and 91226 transitions. [2023-11-06 23:09:44,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states 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 23:09:44,344 INFO L276 IsEmpty]: Start isEmpty. Operand 83862 states and 91226 transitions. [2023-11-06 23:09:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2023-11-06 23:09:44,351 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:44,351 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:44,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 23:09:44,352 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:44,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:44,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1699822566, now seen corresponding path program 1 times [2023-11-06 23:09:44,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:44,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43339006] [2023-11-06 23:09:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:44,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 284 proven. 113 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:09:46,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:46,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43339006] [2023-11-06 23:09:46,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43339006] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:09:46,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419779874] [2023-11-06 23:09:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:46,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:46,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:46,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:46,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:09:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:46,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:09:46,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 320 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2023-11-06 23:09:46,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:46,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419779874] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:46,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:09:46,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-06 23:09:46,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716801263] [2023-11-06 23:09:46,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:46,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:46,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:46,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:46,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:09:46,547 INFO L87 Difference]: Start difference. First operand 83862 states and 91226 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 23:09:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:51,717 INFO L93 Difference]: Finished difference Result 165345 states and 181501 transitions. [2023-11-06 23:09:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:51,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2023-11-06 23:09:51,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:51,819 INFO L225 Difference]: With dead ends: 165345 [2023-11-06 23:09:51,819 INFO L226 Difference]: Without dead ends: 93300 [2023-11-06 23:09:51,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:09:51,853 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 1215 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:51,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1215 Valid, 407 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-06 23:09:51,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93300 states. [2023-11-06 23:09:53,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93300 to 93300. [2023-11-06 23:09:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93300 states, 93299 states have (on average 1.091372897887437) internal successors, (101824), 93299 states have internal predecessors, (101824), 0 states have call successors, (0), 0 states 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 23:09:53,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93300 states to 93300 states and 101824 transitions. [2023-11-06 23:09:53,181 INFO L78 Accepts]: Start accepts. Automaton has 93300 states and 101824 transitions. Word has length 386 [2023-11-06 23:09:53,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:53,182 INFO L495 AbstractCegarLoop]: Abstraction has 93300 states and 101824 transitions. [2023-11-06 23:09:53,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 23:09:53,182 INFO L276 IsEmpty]: Start isEmpty. Operand 93300 states and 101824 transitions. [2023-11-06 23:09:53,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2023-11-06 23:09:53,195 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:53,196 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, 4, 4, 4, 4, 4, 4, 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, 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] [2023-11-06 23:09:53,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:53,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:53,403 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:53,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash 486646981, now seen corresponding path program 1 times [2023-11-06 23:09:53,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:53,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450530510] [2023-11-06 23:09:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:53,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2023-11-06 23:09:54,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:54,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450530510] [2023-11-06 23:09:54,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450530510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:54,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:54,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:54,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733274641] [2023-11-06 23:09:54,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:54,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:54,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:54,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:54,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:54,340 INFO L87 Difference]: Start difference. First operand 93300 states and 101824 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states 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 23:09:59,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:59,418 INFO L93 Difference]: Finished difference Result 210232 states and 229009 transitions. [2023-11-06 23:09:59,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:59,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 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 419 [2023-11-06 23:09:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:59,782 INFO L225 Difference]: With dead ends: 210232 [2023-11-06 23:09:59,782 INFO L226 Difference]: Without dead ends: 117721 [2023-11-06 23:09:59,816 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 23:09:59,818 INFO L413 NwaCegarLoop]: 982 mSDtfsCounter, 797 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 1123 SdHoareTripleChecker+Invalid, 2843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:59,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [797 Valid, 1123 Invalid, 2843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-06 23:09:59,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117721 states. [2023-11-06 23:10:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117721 to 115338. [2023-11-06 23:10:01,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115338 states, 115337 states have (on average 1.0818384386623547) internal successors, (124776), 115337 states have internal predecessors, (124776), 0 states have call successors, (0), 0 states 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 23:10:01,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115338 states to 115338 states and 124776 transitions. [2023-11-06 23:10:01,680 INFO L78 Accepts]: Start accepts. Automaton has 115338 states and 124776 transitions. Word has length 419 [2023-11-06 23:10:01,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:01,681 INFO L495 AbstractCegarLoop]: Abstraction has 115338 states and 124776 transitions. [2023-11-06 23:10:01,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states 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 23:10:01,681 INFO L276 IsEmpty]: Start isEmpty. Operand 115338 states and 124776 transitions. [2023-11-06 23:10:01,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2023-11-06 23:10:01,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:01,692 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, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 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] [2023-11-06 23:10:01,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-06 23:10:01,693 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:01,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:01,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1687088971, now seen corresponding path program 1 times [2023-11-06 23:10:01,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:01,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515979921] [2023-11-06 23:10:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:01,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 369 proven. 113 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-11-06 23:10:03,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:03,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515979921] [2023-11-06 23:10:03,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515979921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:03,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77779972] [2023-11-06 23:10:03,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:03,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:03,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:03,289 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:03,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:10:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:03,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:10:03,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2023-11-06 23:10:03,626 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:03,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77779972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:03,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:10:03,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-06 23:10:03,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517704542] [2023-11-06 23:10:03,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:03,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:03,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:03,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:03,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:10:03,630 INFO L87 Difference]: Start difference. First operand 115338 states and 124776 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states 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 23:10:08,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:08,873 INFO L93 Difference]: Finished difference Result 231465 states and 250350 transitions. [2023-11-06 23:10:08,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:08,874 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 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 429 [2023-11-06 23:10:08,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:09,043 INFO L225 Difference]: With dead ends: 231465 [2023-11-06 23:10:09,043 INFO L226 Difference]: Without dead ends: 116916 [2023-11-06 23:10:09,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:10:09,090 INFO L413 NwaCegarLoop]: 1389 mSDtfsCounter, 1000 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2482 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1000 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:09,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1000 Valid, 1473 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2482 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-06 23:10:09,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116916 states. [2023-11-06 23:10:10,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116916 to 115327. [2023-11-06 23:10:10,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115327 states, 115326 states have (on average 1.0682846886218198) internal successors, (123201), 115326 states have internal predecessors, (123201), 0 states have call successors, (0), 0 states 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 23:10:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115327 states to 115327 states and 123201 transitions. [2023-11-06 23:10:10,661 INFO L78 Accepts]: Start accepts. Automaton has 115327 states and 123201 transitions. Word has length 429 [2023-11-06 23:10:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:10,662 INFO L495 AbstractCegarLoop]: Abstraction has 115327 states and 123201 transitions. [2023-11-06 23:10:10,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states 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 23:10:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 115327 states and 123201 transitions. [2023-11-06 23:10:10,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2023-11-06 23:10:10,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:10,673 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 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] [2023-11-06 23:10:10,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:10,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:10:10,886 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:10,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:10,887 INFO L85 PathProgramCache]: Analyzing trace with hash -722095746, now seen corresponding path program 1 times [2023-11-06 23:10:10,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:10,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863406918] [2023-11-06 23:10:10,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:10,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:10,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 405 proven. 113 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2023-11-06 23:10:12,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:12,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863406918] [2023-11-06 23:10:12,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863406918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:12,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064742440] [2023-11-06 23:10:12,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:12,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:12,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:12,929 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:12,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:10:13,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:13,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:10:13,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 391 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-11-06 23:10:13,298 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:13,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064742440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:13,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:10:13,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-06 23:10:13,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962056301] [2023-11-06 23:10:13,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:13,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:13,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:13,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:13,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:10:13,302 INFO L87 Difference]: Start difference. First operand 115327 states and 123201 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states 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 23:10:18,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:18,691 INFO L93 Difference]: Finished difference Result 254270 states and 272379 transitions. [2023-11-06 23:10:18,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:18,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 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 447 [2023-11-06 23:10:18,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:18,852 INFO L225 Difference]: With dead ends: 254270 [2023-11-06 23:10:18,852 INFO L226 Difference]: Without dead ends: 139732 [2023-11-06 23:10:18,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:10:18,883 INFO L413 NwaCegarLoop]: 1644 mSDtfsCounter, 843 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2494 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:18,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 1762 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2494 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-06 23:10:18,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139732 states. [2023-11-06 23:10:20,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139732 to 137361. [2023-11-06 23:10:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137361 states, 137360 states have (on average 1.0682367501456027) internal successors, (146733), 137360 states have internal predecessors, (146733), 0 states have call successors, (0), 0 states 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 23:10:20,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137361 states to 137361 states and 146733 transitions. [2023-11-06 23:10:20,760 INFO L78 Accepts]: Start accepts. Automaton has 137361 states and 146733 transitions. Word has length 447 [2023-11-06 23:10:20,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:20,760 INFO L495 AbstractCegarLoop]: Abstraction has 137361 states and 146733 transitions. [2023-11-06 23:10:20,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states 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 23:10:20,760 INFO L276 IsEmpty]: Start isEmpty. Operand 137361 states and 146733 transitions. [2023-11-06 23:10:20,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2023-11-06 23:10:20,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:20,772 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:20,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:20,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:10:20,978 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:20,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:20,978 INFO L85 PathProgramCache]: Analyzing trace with hash 963776321, now seen corresponding path program 1 times [2023-11-06 23:10:20,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:20,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198452741] [2023-11-06 23:10:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:20,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 473 proven. 113 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-11-06 23:10:23,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:23,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198452741] [2023-11-06 23:10:23,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198452741] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072331607] [2023-11-06 23:10:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:23,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:23,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:23,177 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:23,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:10:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:23,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:10:23,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 461 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-11-06 23:10:23,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:23,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072331607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:23,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:10:23,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2023-11-06 23:10:23,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365660391] [2023-11-06 23:10:23,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:23,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:23,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:23,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:23,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:10:23,578 INFO L87 Difference]: Start difference. First operand 137361 states and 146733 transitions. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 23:10:28,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:28,371 INFO L93 Difference]: Finished difference Result 275492 states and 294219 transitions. [2023-11-06 23:10:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:28,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 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 484 [2023-11-06 23:10:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:28,530 INFO L225 Difference]: With dead ends: 275492 [2023-11-06 23:10:28,530 INFO L226 Difference]: Without dead ends: 138920 [2023-11-06 23:10:28,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:10:28,574 INFO L413 NwaCegarLoop]: 414 mSDtfsCounter, 973 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 2344 mSolverCounterSat, 672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 3016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 672 IncrementalHoareTripleChecker+Valid, 2344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:28,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 458 Invalid, 3016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [672 Valid, 2344 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-06 23:10:28,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138920 states. [2023-11-06 23:10:30,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138920 to 137331. [2023-11-06 23:10:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137331 states, 137330 states have (on average 1.058588800699046) internal successors, (145376), 137330 states have internal predecessors, (145376), 0 states have call successors, (0), 0 states 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 23:10:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137331 states to 137331 states and 145376 transitions. [2023-11-06 23:10:30,502 INFO L78 Accepts]: Start accepts. Automaton has 137331 states and 145376 transitions. Word has length 484 [2023-11-06 23:10:30,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:30,503 INFO L495 AbstractCegarLoop]: Abstraction has 137331 states and 145376 transitions. [2023-11-06 23:10:30,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states 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 23:10:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 137331 states and 145376 transitions. [2023-11-06 23:10:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2023-11-06 23:10:30,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:30,522 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2023-11-06 23:10:30,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:30,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 23:10:30,723 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:30,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:30,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1977417202, now seen corresponding path program 1 times [2023-11-06 23:10:30,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:30,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693493705] [2023-11-06 23:10:30,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:30,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 734 proven. 0 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2023-11-06 23:10:31,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:31,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693493705] [2023-11-06 23:10:31,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693493705] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:31,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:31,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:10:31,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278983029] [2023-11-06 23:10:31,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:31,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:10:31,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:31,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:10:31,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:31,532 INFO L87 Difference]: Start difference. First operand 137331 states and 145376 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 23:10:36,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:36,776 INFO L93 Difference]: Finished difference Result 261281 states and 277100 transitions. [2023-11-06 23:10:36,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:36,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 546 [2023-11-06 23:10:36,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:36,906 INFO L225 Difference]: With dead ends: 261281 [2023-11-06 23:10:36,906 INFO L226 Difference]: Without dead ends: 138124 [2023-11-06 23:10:36,933 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 23:10:36,934 INFO L413 NwaCegarLoop]: 1764 mSDtfsCounter, 722 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2506 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1892 SdHoareTripleChecker+Invalid, 2511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:36,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1892 Invalid, 2511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2506 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-06 23:10:37,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138124 states. [2023-11-06 23:10:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138124 to 138119. [2023-11-06 23:10:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138119 states, 138118 states have (on average 1.058544143413603) internal successors, (146204), 138118 states have internal predecessors, (146204), 0 states have call successors, (0), 0 states 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 23:10:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138119 states to 138119 states and 146204 transitions. [2023-11-06 23:10:39,234 INFO L78 Accepts]: Start accepts. Automaton has 138119 states and 146204 transitions. Word has length 546 [2023-11-06 23:10:39,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:39,235 INFO L495 AbstractCegarLoop]: Abstraction has 138119 states and 146204 transitions. [2023-11-06 23:10:39,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states 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 23:10:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand 138119 states and 146204 transitions. [2023-11-06 23:10:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2023-11-06 23:10:39,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:39,256 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2023-11-06 23:10:39,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-06 23:10:39,257 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:39,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:39,257 INFO L85 PathProgramCache]: Analyzing trace with hash 733844600, now seen corresponding path program 1 times [2023-11-06 23:10:39,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:39,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122314579] [2023-11-06 23:10:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:39,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:40,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 692 proven. 0 refuted. 0 times theorem prover too weak. 374 trivial. 0 not checked. [2023-11-06 23:10:40,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:40,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122314579] [2023-11-06 23:10:40,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122314579] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:40,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:40,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:10:40,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722911985] [2023-11-06 23:10:40,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:40,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:10:40,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:40,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:10:40,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:10:40,076 INFO L87 Difference]: Start difference. First operand 138119 states and 146204 transitions. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 23:10:50,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:50,054 INFO L93 Difference]: Finished difference Result 324388 states and 343250 transitions. [2023-11-06 23:10:50,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:10:50,055 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 548 [2023-11-06 23:10:50,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:50,286 INFO L225 Difference]: With dead ends: 324388 [2023-11-06 23:10:50,286 INFO L226 Difference]: Without dead ends: 187058 [2023-11-06 23:10:50,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:10:50,346 INFO L413 NwaCegarLoop]: 593 mSDtfsCounter, 1663 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 5691 mSolverCounterSat, 732 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1663 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 6423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 732 IncrementalHoareTripleChecker+Valid, 5691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:50,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1663 Valid, 766 Invalid, 6423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [732 Valid, 5691 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2023-11-06 23:10:50,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187058 states. [2023-11-06 23:10:52,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187058 to 182231. [2023-11-06 23:10:52,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182231 states, 182230 states have (on average 1.0578280195357515) internal successors, (192768), 182230 states have internal predecessors, (192768), 0 states have call successors, (0), 0 states 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 23:10:52,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182231 states to 182231 states and 192768 transitions. [2023-11-06 23:10:52,735 INFO L78 Accepts]: Start accepts. Automaton has 182231 states and 192768 transitions. Word has length 548 [2023-11-06 23:10:52,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:52,736 INFO L495 AbstractCegarLoop]: Abstraction has 182231 states and 192768 transitions. [2023-11-06 23:10:52,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 23:10:52,736 INFO L276 IsEmpty]: Start isEmpty. Operand 182231 states and 192768 transitions. [2023-11-06 23:10:52,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2023-11-06 23:10:52,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:52,748 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:52,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 23:10:52,748 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:52,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:52,749 INFO L85 PathProgramCache]: Analyzing trace with hash 343538416, now seen corresponding path program 1 times [2023-11-06 23:10:52,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:52,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905064880] [2023-11-06 23:10:52,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:52,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 343 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 23:10:54,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:54,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905064880] [2023-11-06 23:10:54,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905064880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:10:54,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296348995] [2023-11-06 23:10:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:54,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:54,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:54,949 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:54,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b75470b-d095-44e8-bee9-e3234d9aab79/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process