./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann01-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:55:21,550 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:55:21,657 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:55:21,664 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:55:21,665 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:55:21,701 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:55:21,702 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:55:21,702 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:55:21,703 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:55:21,708 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:55:21,710 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:55:21,710 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:55:21,711 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:55:21,712 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:55:21,713 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:55:21,713 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:55:21,713 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:55:21,714 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:55:21,714 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:55:21,715 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:55:21,715 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:55:21,716 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:55:21,716 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:55:21,717 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:55:21,717 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:55:21,718 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:55:21,718 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:55:21,719 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:55:21,719 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:21,719 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:55:21,721 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:55:21,721 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:55:21,721 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:55:21,721 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:55:21,722 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:55:21,722 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:55:21,722 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:55:21,722 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:55:21,723 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:55:21,723 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_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b [2023-11-19 07:55:22,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:55:22,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:55:22,055 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:55:22,056 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:55:22,057 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:55:22,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/recursive/Ackermann01-2.c [2023-11-19 07:55:25,171 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:55:25,361 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:55:25,361 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/sv-benchmarks/c/recursive/Ackermann01-2.c [2023-11-19 07:55:25,370 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/data/563ee5d6f/89d91b8c6df3412b9245c54b88aec262/FLAGc6a98d7d6 [2023-11-19 07:55:25,386 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/data/563ee5d6f/89d91b8c6df3412b9245c54b88aec262 [2023-11-19 07:55:25,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:55:25,395 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:55:25,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:25,398 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:55:25,404 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:55:25,405 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:25" (1/1) ... [2023-11-19 07:55:25,406 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c4981a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:25, skipping insertion in model container [2023-11-19 07:55:25,406 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:55:25" (1/1) ... [2023-11-19 07:55:25,431 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:55:25,635 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_b6832684-a29f-4f18-bb21-06bf7b841f8d/sv-benchmarks/c/recursive/Ackermann01-2.c[1234,1247] [2023-11-19 07:55:25,641 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:25,654 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:55:25,679 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_b6832684-a29f-4f18-bb21-06bf7b841f8d/sv-benchmarks/c/recursive/Ackermann01-2.c[1234,1247] [2023-11-19 07:55:25,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:55:25,697 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:55:25,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:25 WrapperNode [2023-11-19 07:55:25,697 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:55:25,699 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:25,699 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:55:25,699 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:55:25,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:25" (1/1) ... [2023-11-19 07:55:25,715 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:25" (1/1) ... [2023-11-19 07:55:25,736 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2023-11-19 07:55:25,737 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:55:25,739 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:55:25,739 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:55:25,739 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:55:25,750 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:25" (1/1) ... [2023-11-19 07:55:25,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:25" (1/1) ... [2023-11-19 07:55:25,759 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:25" (1/1) ... [2023-11-19 07:55:25,760 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:25" (1/1) ... [2023-11-19 07:55:25,763 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:25" (1/1) ... [2023-11-19 07:55:25,770 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:25" (1/1) ... [2023-11-19 07:55:25,771 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:25" (1/1) ... [2023-11-19 07:55:25,772 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:25" (1/1) ... [2023-11-19 07:55:25,773 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:55:25,774 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:55:25,775 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:55:25,775 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:55:25,776 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:25" (1/1) ... [2023-11-19 07:55:25,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:55:25,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:25,815 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:55:25,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:55:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:55:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:55:25,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:55:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-11-19 07:55:25,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-11-19 07:55:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:55:25,934 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:55:25,937 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:55:26,163 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:55:26,173 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:55:26,173 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 07:55:26,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:26 BoogieIcfgContainer [2023-11-19 07:55:26,178 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:55:26,183 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:55:26,183 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:55:26,186 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:55:26,186 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:55:25" (1/3) ... [2023-11-19 07:55:26,187 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de0010d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:26, skipping insertion in model container [2023-11-19 07:55:26,187 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:55:25" (2/3) ... [2023-11-19 07:55:26,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de0010d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:55:26, skipping insertion in model container [2023-11-19 07:55:26,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:26" (3/3) ... [2023-11-19 07:55:26,189 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2023-11-19 07:55:26,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:55:26,210 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:55:26,280 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:55:26,288 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@130b1eac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:55:26,289 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:55:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:55:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 07:55:26,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:26,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:26,305 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:26,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:26,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1470704041, now seen corresponding path program 1 times [2023-11-19 07:55:26,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:26,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694967768] [2023-11-19 07:55:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:26,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:26,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:55:26,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:55:26,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:26,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694967768] [2023-11-19 07:55:26,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694967768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:26,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:26,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:55:26,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958695260] [2023-11-19 07:55:26,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:26,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:55:26,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:26,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:55:26,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:55:26,835 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:55:27,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:27,002 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2023-11-19 07:55:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:55:27,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-19 07:55:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:27,013 INFO L225 Difference]: With dead ends: 34 [2023-11-19 07:55:27,013 INFO L226 Difference]: Without dead ends: 22 [2023-11-19 07:55:27,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:55:27,020 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:27,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 81 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:55:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-19 07:55:27,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-19 07:55:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 07:55:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-11-19 07:55:27,065 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2023-11-19 07:55:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:27,065 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-11-19 07:55:27,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:55:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-11-19 07:55:27,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 07:55:27,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:27,068 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:27,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:55:27,069 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:27,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:27,070 INFO L85 PathProgramCache]: Analyzing trace with hash 941922339, now seen corresponding path program 1 times [2023-11-19 07:55:27,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:27,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122992363] [2023-11-19 07:55:27,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:27,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:27,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:55:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:27,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:55:27,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:27,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122992363] [2023-11-19 07:55:27,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122992363] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:55:27,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:55:27,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:55:27,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865831973] [2023-11-19 07:55:27,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:55:27,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:55:27,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:27,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:55:27,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:55:27,364 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:55:27,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:27,512 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2023-11-19 07:55:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:55:27,513 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-11-19 07:55:27,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:27,515 INFO L225 Difference]: With dead ends: 29 [2023-11-19 07:55:27,515 INFO L226 Difference]: Without dead ends: 25 [2023-11-19 07:55:27,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:55:27,518 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:27,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 68 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:55:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-19 07:55:27,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-11-19 07:55:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-19 07:55:27,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-11-19 07:55:27,528 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 19 [2023-11-19 07:55:27,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:27,529 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-11-19 07:55:27,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:55:27,529 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-11-19 07:55:27,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 07:55:27,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:27,531 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:27,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:55:27,532 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:27,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:27,533 INFO L85 PathProgramCache]: Analyzing trace with hash -445405100, now seen corresponding path program 1 times [2023-11-19 07:55:27,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:27,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568032391] [2023-11-19 07:55:27,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:27,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:27,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:55:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:27,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:27,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-19 07:55:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:27,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:55:27,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:27,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568032391] [2023-11-19 07:55:27,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568032391] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:27,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383326699] [2023-11-19 07:55:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:27,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:27,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:27,694 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:27,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:55:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:27,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:55:27,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:55:27,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:55:28,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383326699] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:28,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:28,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2023-11-19 07:55:28,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888410800] [2023-11-19 07:55:28,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:28,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:55:28,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:28,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:55:28,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:55:28,167 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-19 07:55:28,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:28,306 INFO L93 Difference]: Finished difference Result 48 states and 75 transitions. [2023-11-19 07:55:28,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:55:28,307 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 25 [2023-11-19 07:55:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:28,309 INFO L225 Difference]: With dead ends: 48 [2023-11-19 07:55:28,309 INFO L226 Difference]: Without dead ends: 30 [2023-11-19 07:55:28,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:55:28,320 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:28,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 100 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:55:28,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-19 07:55:28,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2023-11-19 07:55:28,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-19 07:55:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-11-19 07:55:28,333 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 25 [2023-11-19 07:55:28,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:28,333 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-11-19 07:55:28,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-19 07:55:28,334 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-19 07:55:28,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 07:55:28,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:28,336 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:28,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:28,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:28,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:28,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:28,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1893657534, now seen corresponding path program 1 times [2023-11-19 07:55:28,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:28,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995582873] [2023-11-19 07:55:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:28,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:28,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:55:28,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:28,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:28,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:28,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-19 07:55:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:28,988 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:55:28,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:28,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995582873] [2023-11-19 07:55:28,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995582873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:28,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233365858] [2023-11-19 07:55:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:28,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:28,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:28,991 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:29,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:55:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:29,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:55:29,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:29,164 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 07:55:29,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:55:29,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233365858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:29,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:29,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 25 [2023-11-19 07:55:29,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077093539] [2023-11-19 07:55:29,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:29,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:55:29,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:29,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:55:29,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:55:29,828 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 07:55:30,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:30,819 INFO L93 Difference]: Finished difference Result 72 states and 133 transitions. [2023-11-19 07:55:30,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-19 07:55:30,820 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 32 [2023-11-19 07:55:30,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:30,824 INFO L225 Difference]: With dead ends: 72 [2023-11-19 07:55:30,825 INFO L226 Difference]: Without dead ends: 66 [2023-11-19 07:55:30,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=423, Invalid=2027, Unknown=0, NotChecked=0, Total=2450 [2023-11-19 07:55:30,828 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 45 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:30,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 158 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:55:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-19 07:55:30,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 38. [2023-11-19 07:55:30,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (31), 10 states have call predecessors, (31), 6 states have call successors, (31) [2023-11-19 07:55:30,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2023-11-19 07:55:30,853 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 32 [2023-11-19 07:55:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:30,853 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2023-11-19 07:55:30,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 07:55:30,854 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2023-11-19 07:55:30,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 07:55:30,856 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:30,856 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:30,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:31,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:31,072 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:31,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:31,073 INFO L85 PathProgramCache]: Analyzing trace with hash 372648096, now seen corresponding path program 2 times [2023-11-19 07:55:31,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:31,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092586638] [2023-11-19 07:55:31,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:31,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:31,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:55:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:31,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:31,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:31,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:31,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:31,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-19 07:55:31,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:31,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 07:55:31,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:31,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092586638] [2023-11-19 07:55:31,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092586638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:31,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085263862] [2023-11-19 07:55:31,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:55:31,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:31,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:31,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:31,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:55:31,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:55:31,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:31,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:55:31,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 07:55:31,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 07:55:32,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085263862] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:32,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:32,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2023-11-19 07:55:32,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298323879] [2023-11-19 07:55:32,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:32,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:55:32,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:32,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:55:32,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:55:32,093 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 6 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2023-11-19 07:55:32,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:32,412 INFO L93 Difference]: Finished difference Result 96 states and 220 transitions. [2023-11-19 07:55:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:55:32,413 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 6 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) Word has length 46 [2023-11-19 07:55:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:32,421 INFO L225 Difference]: With dead ends: 96 [2023-11-19 07:55:32,422 INFO L226 Difference]: Without dead ends: 63 [2023-11-19 07:55:32,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2023-11-19 07:55:32,429 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 54 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:32,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 108 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:55:32,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-19 07:55:32,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2023-11-19 07:55:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 9 states have call successors, (9), 2 states have call predecessors, (9), 11 states have return successors, (57), 17 states have call predecessors, (57), 9 states have call successors, (57) [2023-11-19 07:55:32,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 107 transitions. [2023-11-19 07:55:32,466 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 107 transitions. Word has length 46 [2023-11-19 07:55:32,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:32,467 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 107 transitions. [2023-11-19 07:55:32,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 6 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2023-11-19 07:55:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 107 transitions. [2023-11-19 07:55:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-11-19 07:55:32,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:55:32,479 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:55:32,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:32,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:32,680 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:55:32,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:55:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash -558645120, now seen corresponding path program 3 times [2023-11-19 07:55:32,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:55:32,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909853915] [2023-11-19 07:55:32,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:55:32,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:55:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:32,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-11-19 07:55:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-19 07:55:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-19 07:55:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-19 07:55:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-19 07:55:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:55:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 100 proven. 93 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-11-19 07:55:33,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:55:33,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909853915] [2023-11-19 07:55:33,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909853915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:55:33,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081339529] [2023-11-19 07:55:33,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:55:33,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:55:33,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:55:33,531 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:55:33,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:55:33,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-19 07:55:33,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:55:33,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:55:33,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:55:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 112 proven. 20 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2023-11-19 07:55:33,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:55:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2023-11-19 07:55:36,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081339529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:55:36,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:55:36,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 32 [2023-11-19 07:55:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398583373] [2023-11-19 07:55:36,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:55:36,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-19 07:55:36,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:55:36,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-19 07:55:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2023-11-19 07:55:36,350 INFO L87 Difference]: Start difference. First operand 60 states and 107 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 24 states have internal predecessors, (64), 7 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (27), 17 states have call predecessors, (27), 7 states have call successors, (27) [2023-11-19 07:55:37,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:55:37,618 INFO L93 Difference]: Finished difference Result 153 states and 443 transitions. [2023-11-19 07:55:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-19 07:55:37,619 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 24 states have internal predecessors, (64), 7 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (27), 17 states have call predecessors, (27), 7 states have call successors, (27) Word has length 86 [2023-11-19 07:55:37,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:55:37,620 INFO L225 Difference]: With dead ends: 153 [2023-11-19 07:55:37,620 INFO L226 Difference]: Without dead ends: 0 [2023-11-19 07:55:37,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=663, Invalid=3497, Unknown=0, NotChecked=0, Total=4160 [2023-11-19 07:55:37,625 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 94 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:55:37,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 153 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:55:37,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-19 07:55:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-19 07:55:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:55:37,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-19 07:55:37,627 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2023-11-19 07:55:37,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:55:37,628 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-19 07:55:37,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 24 states have internal predecessors, (64), 7 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (27), 17 states have call predecessors, (27), 7 states have call successors, (27) [2023-11-19 07:55:37,628 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-19 07:55:37,628 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-19 07:55:37,631 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-19 07:55:37,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:55:37,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:55:37,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-11-19 07:55:38,346 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-11-19 07:55:38,346 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-11-19 07:55:38,347 INFO L899 garLoopResultBuilder]: For program point L30(lines 30 34) no Hoare annotation was computed. [2023-11-19 07:55:38,347 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-11-19 07:55:38,347 INFO L899 garLoopResultBuilder]: For program point L28(lines 28 48) no Hoare annotation was computed. [2023-11-19 07:55:38,347 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2023-11-19 07:55:38,347 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2023-11-19 07:55:38,347 INFO L899 garLoopResultBuilder]: For program point L43(lines 43 47) no Hoare annotation was computed. [2023-11-19 07:55:38,347 INFO L895 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (<= 0 |ULTIMATE.start_main_~n~0#1|) [2023-11-19 07:55:38,347 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-11-19 07:55:38,348 INFO L899 garLoopResultBuilder]: For program point L42-1(line 42) no Hoare annotation was computed. [2023-11-19 07:55:38,348 INFO L899 garLoopResultBuilder]: For program point L36(lines 36 41) no Hoare annotation was computed. [2023-11-19 07:55:38,348 INFO L899 garLoopResultBuilder]: For program point ackermannEXIT(lines 17 25) no Hoare annotation was computed. [2023-11-19 07:55:38,348 INFO L895 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|) (not (= |ackermann_#in~m| 0))) [2023-11-19 07:55:38,348 INFO L899 garLoopResultBuilder]: For program point L24-1(line 24) no Hoare annotation was computed. [2023-11-19 07:55:38,348 INFO L895 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (and (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|) (not (= |ackermann_#in~m| 0)) (<= |ackermann_#in~n| 0)) [2023-11-19 07:55:38,348 INFO L895 garLoopResultBuilder]: At program point L24-2(line 24) the Hoare annotation is: (let ((.cse0 (= ackermann_~n |ackermann_#in~n|))) (or (and (<= 0 (+ |ackermann_#t~ret5| 1)) (<= 2 |ackermann_#in~m|) .cse0 (= ackermann_~m |ackermann_#in~m|)) (and (= ackermann_~m 1) .cse0 (<= 2 |ackermann_#t~ret5|) (= |ackermann_#in~m| 1)))) [2023-11-19 07:55:38,348 INFO L899 garLoopResultBuilder]: For program point L21(lines 21 23) no Hoare annotation was computed. [2023-11-19 07:55:38,349 INFO L899 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2023-11-19 07:55:38,349 INFO L899 garLoopResultBuilder]: For program point L24-3(line 24) no Hoare annotation was computed. [2023-11-19 07:55:38,349 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2023-11-19 07:55:38,349 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 17 25) the Hoare annotation is: true [2023-11-19 07:55:38,349 INFO L899 garLoopResultBuilder]: For program point ackermannFINAL(lines 17 25) no Hoare annotation was computed. [2023-11-19 07:55:38,355 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2023-11-19 07:55:38,358 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 07:55:38,364 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:55:38 BoogieIcfgContainer [2023-11-19 07:55:38,364 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 07:55:38,365 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 07:55:38,366 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 07:55:38,366 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 07:55:38,366 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:55:26" (3/4) ... [2023-11-19 07:55:38,368 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-19 07:55:38,373 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2023-11-19 07:55:38,378 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-11-19 07:55:38,378 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-19 07:55:38,378 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-11-19 07:55:38,385 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-19 07:55:38,476 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/witness.graphml [2023-11-19 07:55:38,477 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/witness.yml [2023-11-19 07:55:38,477 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 07:55:38,478 INFO L158 Benchmark]: Toolchain (without parser) took 13082.98ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 114.7MB in the beginning and 153.3MB in the end (delta: -38.6MB). Peak memory consumption was 101.6MB. Max. memory is 16.1GB. [2023-11-19 07:55:38,478 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 117.4MB. Free memory is still 67.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:55:38,478 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.80ms. Allocated memory is still 155.2MB. Free memory was 114.4MB in the beginning and 104.1MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 07:55:38,479 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.51ms. Allocated memory is still 155.2MB. Free memory was 104.1MB in the beginning and 102.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:55:38,479 INFO L158 Benchmark]: Boogie Preprocessor took 35.03ms. Allocated memory is still 155.2MB. Free memory was 102.4MB in the beginning and 101.7MB in the end (delta: 790.1kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 07:55:38,479 INFO L158 Benchmark]: RCFGBuilder took 404.69ms. Allocated memory is still 155.2MB. Free memory was 101.4MB in the beginning and 91.2MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-19 07:55:38,480 INFO L158 Benchmark]: TraceAbstraction took 12181.98ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 90.6MB in the beginning and 48.3MB in the end (delta: 42.3MB). Peak memory consumption was 76.4MB. Max. memory is 16.1GB. [2023-11-19 07:55:38,480 INFO L158 Benchmark]: Witness Printer took 111.64ms. Allocated memory is still 186.6MB. Free memory was 48.3MB in the beginning and 153.3MB in the end (delta: -105.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 07:55:38,484 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 117.4MB. Free memory is still 67.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.80ms. Allocated memory is still 155.2MB. Free memory was 114.4MB in the beginning and 104.1MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.51ms. Allocated memory is still 155.2MB. Free memory was 104.1MB in the beginning and 102.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.03ms. Allocated memory is still 155.2MB. Free memory was 102.4MB in the beginning and 101.7MB in the end (delta: 790.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 404.69ms. Allocated memory is still 155.2MB. Free memory was 101.4MB in the beginning and 91.2MB in the end (delta: 10.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 12181.98ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 90.6MB in the beginning and 48.3MB in the end (delta: 42.3MB). Peak memory consumption was 76.4MB. Max. memory is 16.1GB. * Witness Printer took 111.64ms. Allocated memory is still 186.6MB. Free memory was 48.3MB in the beginning and 153.3MB in the end (delta: -105.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 46]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.1s, OverallIterations: 6, TraceHistogramMax: 12, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 261 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 241 mSDsluCounter, 668 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 558 mSDsCounter, 239 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1615 IncrementalHoareTripleChecker+Invalid, 1854 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 239 mSolverCounterUnsat, 110 mSDtfsCounter, 1615 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 564 GetRequests, 390 SyntacticMatches, 4 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=5, InterpolantAutomatonStates: 110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 38 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 125 PreInvPairs, 213 NumberOfFragments, 58 HoareAnnotationTreeSize, 125 FomulaSimplifications, 8223 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 5 FomulaSimplificationsInter, 574 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.7s InterpolantComputationTime, 409 NumberOfCodeBlocks, 372 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 584 ConstructedInterpolants, 0 QuantifiedInterpolants, 1314 SizeOfPredicates, 10 NumberOfNonLiveVariables, 515 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 1129/1303 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-19 07:55:38,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b6832684-a29f-4f18-bb21-06bf7b841f8d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE