./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/list_search-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/list_search-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:13:52,834 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:13:52,937 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:13:52,943 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:13:52,943 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:13:52,967 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:13:52,968 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:13:52,968 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:13:52,969 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:13:52,970 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:13:52,971 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:13:52,971 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:13:52,972 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:13:52,973 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:13:52,973 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:13:52,974 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:13:52,975 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:13:52,975 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:13:52,976 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:13:52,976 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:13:52,977 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:13:52,978 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:13:52,978 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:13:52,979 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:13:52,980 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:13:52,980 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:13:52,981 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:13:52,981 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:13:52,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:13:52,983 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:13:52,983 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:13:52,983 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:13:52,984 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:13:52,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:13:52,985 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:13:52,985 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:13:52,986 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:13:52,986 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:13:52,986 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:13:52,987 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_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1ea7ddff382751fa0e11562333bdb4981cac7bdbf1d356a007804e7e2e5a289 [2023-11-12 02:13:53,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:13:53,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:13:53,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:13:53,254 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:13:53,254 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:13:53,256 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/list-properties/list_search-2.i [2023-11-12 02:13:56,496 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:13:56,832 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:13:56,836 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/sv-benchmarks/c/list-properties/list_search-2.i [2023-11-12 02:13:56,860 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/data/a8ce30c45/9388c540a86949f1b032f7f675ebd99c/FLAG82b480e9e [2023-11-12 02:13:56,886 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/data/a8ce30c45/9388c540a86949f1b032f7f675ebd99c [2023-11-12 02:13:56,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:13:56,898 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:13:56,902 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:13:56,902 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:13:56,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:13:56,909 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:13:56" (1/1) ... [2023-11-12 02:13:56,910 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3662852d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:56, skipping insertion in model container [2023-11-12 02:13:56,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:13:56" (1/1) ... [2023-11-12 02:13:56,984 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:13:57,164 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_349248d6-259b-493f-8020-b27a2c595f47/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2023-11-12 02:13:57,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:13:57,521 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:13:57,536 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_349248d6-259b-493f-8020-b27a2c595f47/sv-benchmarks/c/list-properties/list_search-2.i[813,826] [2023-11-12 02:13:57,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:13:57,634 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:13:57,634 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:57 WrapperNode [2023-11-12 02:13:57,635 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:13:57,637 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:13:57,637 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:13:57,637 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:13:57,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:57" (1/1) ... [2023-11-12 02:13:57,667 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:57" (1/1) ... [2023-11-12 02:13:57,692 INFO L138 Inliner]: procedures = 226, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2023-11-12 02:13:57,693 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:13:57,694 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:13:57,694 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:13:57,694 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:13:57,712 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:57" (1/1) ... [2023-11-12 02:13:57,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:57" (1/1) ... [2023-11-12 02:13:57,717 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:57" (1/1) ... [2023-11-12 02:13:57,722 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:57" (1/1) ... [2023-11-12 02:13:57,733 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:57" (1/1) ... [2023-11-12 02:13:57,753 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:57" (1/1) ... [2023-11-12 02:13:57,760 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:57" (1/1) ... [2023-11-12 02:13:57,762 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:57" (1/1) ... [2023-11-12 02:13:57,765 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:13:57,768 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:13:57,775 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:13:57,775 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:13:57,776 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:57" (1/1) ... [2023-11-12 02:13:57,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:13:57,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:57,829 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:13:57,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:13:57,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 02:13:57,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 02:13:57,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:13:57,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:13:57,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 02:13:57,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:13:57,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 02:13:57,875 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2023-11-12 02:13:57,875 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2023-11-12 02:13:57,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:13:57,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:13:57,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:13:58,005 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:13:58,006 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:13:58,222 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:13:58,229 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:13:58,229 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-12 02:13:58,231 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:13:58 BoogieIcfgContainer [2023-11-12 02:13:58,231 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:13:58,234 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:13:58,234 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:13:58,237 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:13:58,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:13:56" (1/3) ... [2023-11-12 02:13:58,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0ab086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:13:58, skipping insertion in model container [2023-11-12 02:13:58,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:13:57" (2/3) ... [2023-11-12 02:13:58,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0ab086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:13:58, skipping insertion in model container [2023-11-12 02:13:58,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:13:58" (3/3) ... [2023-11-12 02:13:58,240 INFO L112 eAbstractionObserver]: Analyzing ICFG list_search-2.i [2023-11-12 02:13:58,260 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:13:58,261 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:13:58,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:13:58,319 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;@43961d84, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:13:58,320 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:13:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 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) [2023-11-12 02:13:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-12 02:13:58,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:58,334 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:58,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:13:58,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:58,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1135484681, now seen corresponding path program 1 times [2023-11-12 02:13:58,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:58,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561303712] [2023-11-12 02:13:58,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:58,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:59,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:13:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:59,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:13:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:59,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:13:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:59,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:13:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:13:59,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:13:59,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561303712] [2023-11-12 02:13:59,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561303712] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:13:59,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650410464] [2023-11-12 02:13:59,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:59,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:13:59,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:13:59,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:13:59,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:13:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:13:59,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:13:59,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:13:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 02:13:59,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:13:59,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650410464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:13:59,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:13:59,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2023-11-12 02:13:59,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107530032] [2023-11-12 02:13:59,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:13:59,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:13:59,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:13:59,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:13:59,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:13:59,607 INFO L87 Difference]: Start difference. First operand has 36 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 30 states have internal predecessors, (42), 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 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:13:59,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:13:59,639 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2023-11-12 02:13:59,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:13:59,642 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-11-12 02:13:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:13:59,651 INFO L225 Difference]: With dead ends: 56 [2023-11-12 02:13:59,651 INFO L226 Difference]: Without dead ends: 25 [2023-11-12 02:13:59,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:13:59,660 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:13:59,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:13:59,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-12 02:13:59,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-12 02:13:59,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 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) [2023-11-12 02:13:59,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-11-12 02:13:59,701 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 37 [2023-11-12 02:13:59,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:13:59,703 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-11-12 02:13:59,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:13:59,703 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-11-12 02:13:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 02:13:59,706 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:13:59,706 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:13:59,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:13:59,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:13:59,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:13:59,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:13:59,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1275349378, now seen corresponding path program 1 times [2023-11-12 02:13:59,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:13:59,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526565543] [2023-11-12 02:13:59,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:13:59,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:13:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:00,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:14:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:00,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:14:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:00,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:14:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:00,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:14:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:14:00,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:00,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526565543] [2023-11-12 02:14:00,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526565543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:00,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490698102] [2023-11-12 02:14:00,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:00,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:00,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:00,357 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:00,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:14:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:00,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:14:00,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 02:14:00,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:14:00,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490698102] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:00,719 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:00,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2023-11-12 02:14:00,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905741312] [2023-11-12 02:14:00,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:00,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:14:00,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:00,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:14:00,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:14:00,724 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-12 02:14:00,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:00,909 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-11-12 02:14:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:14:00,910 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2023-11-12 02:14:00,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:00,912 INFO L225 Difference]: With dead ends: 51 [2023-11-12 02:14:00,913 INFO L226 Difference]: Without dead ends: 31 [2023-11-12 02:14:00,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:14:00,915 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:00,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 101 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-12 02:14:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-11-12 02:14:00,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:14:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-11-12 02:14:00,925 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 39 [2023-11-12 02:14:00,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:00,926 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-11-12 02:14:00,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-12 02:14:00,927 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-11-12 02:14:00,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-12 02:14:00,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:00,929 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:00,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:01,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:01,136 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:01,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:01,136 INFO L85 PathProgramCache]: Analyzing trace with hash 177460864, now seen corresponding path program 1 times [2023-11-12 02:14:01,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:01,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932845115] [2023-11-12 02:14:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:01,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:01,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:14:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:01,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:14:01,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:01,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:14:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:01,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:14:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 02:14:01,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:01,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932845115] [2023-11-12 02:14:01,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932845115] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:01,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:01,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:14:01,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861904580] [2023-11-12 02:14:01,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:01,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:14:01,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:01,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:14:01,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:14:01,375 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:14:01,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:01,524 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-11-12 02:14:01,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:14:01,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2023-11-12 02:14:01,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:01,528 INFO L225 Difference]: With dead ends: 41 [2023-11-12 02:14:01,528 INFO L226 Difference]: Without dead ends: 32 [2023-11-12 02:14:01,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:14:01,532 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:01,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 83 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:01,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-12 02:14:01,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-11-12 02:14:01,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:14:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-11-12 02:14:01,544 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 39 [2023-11-12 02:14:01,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:01,545 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-11-12 02:14:01,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:14:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-11-12 02:14:01,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-12 02:14:01,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:01,547 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:01,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 02:14:01,548 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:01,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:01,565 INFO L85 PathProgramCache]: Analyzing trace with hash 104078038, now seen corresponding path program 1 times [2023-11-12 02:14:01,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:01,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121816237] [2023-11-12 02:14:01,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:01,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:01,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:14:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:01,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:14:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:01,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:14:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:01,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:14:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:01,977 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-12 02:14:01,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:01,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121816237] [2023-11-12 02:14:01,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121816237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:01,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:14:01,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:14:01,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265687494] [2023-11-12 02:14:01,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:01,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:14:01,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:01,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:14:01,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:14:01,989 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:14:02,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:02,109 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-11-12 02:14:02,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:14:02,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2023-11-12 02:14:02,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:02,111 INFO L225 Difference]: With dead ends: 37 [2023-11-12 02:14:02,112 INFO L226 Difference]: Without dead ends: 32 [2023-11-12 02:14:02,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-12 02:14:02,113 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:02,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 125 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:02,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-12 02:14:02,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-12 02:14:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:14:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-11-12 02:14:02,122 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 40 [2023-11-12 02:14:02,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:02,122 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-11-12 02:14:02,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:14:02,123 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-11-12 02:14:02,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-12 02:14:02,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:02,124 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:02,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 02:14:02,125 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:02,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:02,125 INFO L85 PathProgramCache]: Analyzing trace with hash 161336340, now seen corresponding path program 1 times [2023-11-12 02:14:02,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:02,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216898525] [2023-11-12 02:14:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:02,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:02,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:14:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:02,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:14:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:02,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:14:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:02,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:14:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 02:14:02,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:02,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216898525] [2023-11-12 02:14:02,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216898525] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:02,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214313716] [2023-11-12 02:14:02,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:02,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:02,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:02,432 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:02,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:14:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:02,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:14:02,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 02:14:02,661 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:14:02,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214313716] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:14:02,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:14:02,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 10 [2023-11-12 02:14:02,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124414092] [2023-11-12 02:14:02,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:14:02,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:14:02,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:02,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:14:02,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:14:02,664 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:14:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:02,764 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2023-11-12 02:14:02,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:14:02,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2023-11-12 02:14:02,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:02,766 INFO L225 Difference]: With dead ends: 45 [2023-11-12 02:14:02,766 INFO L226 Difference]: Without dead ends: 36 [2023-11-12 02:14:02,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:14:02,767 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:02,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 91 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:14:02,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-12 02:14:02,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2023-11-12 02:14:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:14:02,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-11-12 02:14:02,775 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 40 [2023-11-12 02:14:02,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:02,775 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-11-12 02:14:02,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 02:14:02,776 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-11-12 02:14:02,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-12 02:14:02,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:02,777 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:02,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:02,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:02,984 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:02,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:02,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1968420967, now seen corresponding path program 1 times [2023-11-12 02:14:02,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:02,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841908111] [2023-11-12 02:14:02,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:02,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:03,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:14:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:03,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:14:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:03,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:14:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:03,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:14:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:03,746 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:14:03,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:03,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841908111] [2023-11-12 02:14:03,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841908111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:03,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119727003] [2023-11-12 02:14:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:03,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:03,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:03,748 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:03,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:14:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:03,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 02:14:03,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:04,049 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:14:04,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-12 02:14:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:14:04,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 02:14:04,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119727003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:04,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:04,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 22 [2023-11-12 02:14:04,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375641727] [2023-11-12 02:14:04,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:04,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:14:04,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:04,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:14:04,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:14:04,354 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 02:14:05,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:05,037 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2023-11-12 02:14:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-12 02:14:05,038 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 43 [2023-11-12 02:14:05,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:05,039 INFO L225 Difference]: With dead ends: 52 [2023-11-12 02:14:05,039 INFO L226 Difference]: Without dead ends: 40 [2023-11-12 02:14:05,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2023-11-12 02:14:05,041 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:05,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 227 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:14:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-12 02:14:05,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2023-11-12 02:14:05,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:14:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-11-12 02:14:05,049 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 43 [2023-11-12 02:14:05,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:05,050 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-11-12 02:14:05,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (9), 4 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-12 02:14:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-11-12 02:14:05,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-12 02:14:05,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:05,051 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:05,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:05,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:14:05,257 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:05,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:05,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2034659567, now seen corresponding path program 2 times [2023-11-12 02:14:05,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:05,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552364831] [2023-11-12 02:14:05,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:05,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:05,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:05,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:14:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:05,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:14:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:05,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:14:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:05,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:14:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-12 02:14:06,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:06,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552364831] [2023-11-12 02:14:06,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552364831] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:06,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315740108] [2023-11-12 02:14:06,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-12 02:14:06,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:06,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:06,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:06,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:14:06,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-12 02:14:06,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:06,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:14:06,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:06,456 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2023-11-12 02:14:06,462 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-12 02:14:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 02:14:06,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:06,640 INFO L322 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-12 02:14:06,641 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2023-11-12 02:14:06,652 INFO L322 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2023-11-12 02:14:06,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2023-11-12 02:14:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-12 02:14:06,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315740108] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:06,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:06,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 18 [2023-11-12 02:14:06,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405221947] [2023-11-12 02:14:06,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:06,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:14:06,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:06,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:14:06,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:14:06,675 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 02:14:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:07,152 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-11-12 02:14:07,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-12 02:14:07,153 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2023-11-12 02:14:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:07,154 INFO L225 Difference]: With dead ends: 53 [2023-11-12 02:14:07,154 INFO L226 Difference]: Without dead ends: 44 [2023-11-12 02:14:07,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2023-11-12 02:14:07,156 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 78 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:07,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 148 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:14:07,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-12 02:14:07,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2023-11-12 02:14:07,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:14:07,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2023-11-12 02:14:07,169 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 44 [2023-11-12 02:14:07,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:07,170 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2023-11-12 02:14:07,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-12 02:14:07,170 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2023-11-12 02:14:07,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-12 02:14:07,171 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:07,171 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:07,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:07,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-12 02:14:07,377 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:07,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:07,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1693757662, now seen corresponding path program 3 times [2023-11-12 02:14:07,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:07,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252151011] [2023-11-12 02:14:07,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:07,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:08,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:14:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:08,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:14:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:08,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:14:08,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:08,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:14:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 02:14:09,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:09,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252151011] [2023-11-12 02:14:09,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252151011] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:09,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728087793] [2023-11-12 02:14:09,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-12 02:14:09,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:09,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:09,059 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:09,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:14:09,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-12 02:14:09,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:09,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-12 02:14:09,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:09,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:14:09,351 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:14:09,563 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-11-12 02:14:09,574 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-11-12 02:14:09,739 INFO L322 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-12 02:14:09,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2023-11-12 02:14:09,757 INFO L322 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-12 02:14:09,758 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 31 [2023-11-12 02:14:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-12 02:14:10,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:10,454 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:10,454 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2023-11-12 02:14:10,461 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:10,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2023-11-12 02:14:10,479 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_74 Int) (v_arrayElimArr_4 (Array Int Int)) (v_arrayElimArr_3 (Array Int Int))) (let ((.cse0 (+ c_~head~0.offset 4))) (or (not (= 0 (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_74 v_arrayElimArr_3) c_~head~0.base) .cse0))) (not (= c_~head~0.base (select v_arrayElimArr_3 4))) (not (= c_~head~0.offset (select v_arrayElimArr_4 4))) (not (= (select (select (store |c_#memory_$Pointer$.offset| v_~head~0.base_74 v_arrayElimArr_4) c_~head~0.base) .cse0) 0))))) is different from false [2023-11-12 02:14:10,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728087793] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:10,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:14:10,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-11-12 02:14:10,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155408825] [2023-11-12 02:14:10,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:10,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-12 02:14:10,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:10,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-12 02:14:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1014, Unknown=1, NotChecked=64, Total=1190 [2023-11-12 02:14:10,484 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 4 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-12 02:14:12,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:12,265 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2023-11-12 02:14:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 02:14:12,266 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 4 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2023-11-12 02:14:12,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:12,267 INFO L225 Difference]: With dead ends: 68 [2023-11-12 02:14:12,267 INFO L226 Difference]: Without dead ends: 53 [2023-11-12 02:14:12,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=469, Invalid=2726, Unknown=1, NotChecked=110, Total=3306 [2023-11-12 02:14:12,270 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 130 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:12,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 257 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:14:12,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-12 02:14:12,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2023-11-12 02:14:12,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:14:12,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-11-12 02:14:12,280 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 47 [2023-11-12 02:14:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:12,280 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-11-12 02:14:12,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 25 states have internal predecessors, (59), 4 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-12 02:14:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-11-12 02:14:12,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-12 02:14:12,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:12,282 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:12,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:12,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-12 02:14:12,489 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:12,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:12,489 INFO L85 PathProgramCache]: Analyzing trace with hash 361857145, now seen corresponding path program 4 times [2023-11-12 02:14:12,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:12,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071392519] [2023-11-12 02:14:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:12,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:14,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:14:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:14,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:14:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:14,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:14:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:15,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:14:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 02:14:15,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:15,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071392519] [2023-11-12 02:14:15,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071392519] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:15,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763669814] [2023-11-12 02:14:15,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-12 02:14:15,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:15,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:15,397 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:15,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:14:15,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-12 02:14:15,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:15,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-12 02:14:15,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:15,682 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-12 02:14:15,716 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-12 02:14:15,887 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:14:15,894 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-11-12 02:14:16,061 INFO L322 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-11-12 02:14:16,061 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-11-12 02:14:16,073 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-12 02:14:16,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-11-12 02:14:16,258 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-11-12 02:14:16,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:14:16,435 INFO L322 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-11-12 02:14:16,436 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 43 [2023-11-12 02:14:16,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:14:16,455 INFO L322 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-11-12 02:14:16,455 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-11-12 02:14:16,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:14:16,466 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:14:16,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:14:16,868 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-11-12 02:14:16,992 INFO L322 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2023-11-12 02:14:16,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 26 [2023-11-12 02:14:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-12 02:14:17,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:17,332 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:17,332 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 41 [2023-11-12 02:14:17,339 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:14:17,339 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2023-11-12 02:14:17,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763669814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:17,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:14:17,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 37 [2023-11-12 02:14:17,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928055439] [2023-11-12 02:14:17,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:17,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-12 02:14:17,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:17,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-12 02:14:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2023-11-12 02:14:17,433 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 33 states have internal predecessors, (67), 5 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 02:14:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:20,250 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2023-11-12 02:14:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-12 02:14:20,251 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 33 states have internal predecessors, (67), 5 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2023-11-12 02:14:20,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:20,253 INFO L225 Difference]: With dead ends: 70 [2023-11-12 02:14:20,253 INFO L226 Difference]: Without dead ends: 61 [2023-11-12 02:14:20,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=527, Invalid=3895, Unknown=0, NotChecked=0, Total=4422 [2023-11-12 02:14:20,256 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 111 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:20,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 316 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-12 02:14:20,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-12 02:14:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2023-11-12 02:14:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:14:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2023-11-12 02:14:20,269 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 51 [2023-11-12 02:14:20,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:20,269 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2023-11-12 02:14:20,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 33 states have internal predecessors, (67), 5 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-12 02:14:20,270 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2023-11-12 02:14:20,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-12 02:14:20,271 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:20,271 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:20,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:20,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-12 02:14:20,477 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:20,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:20,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1742339348, now seen corresponding path program 5 times [2023-11-12 02:14:20,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:20,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409087281] [2023-11-12 02:14:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:20,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:22,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-12 02:14:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:22,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-12 02:14:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:22,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-12 02:14:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:22,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-11-12 02:14:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:14:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-12 02:14:22,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:14:22,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409087281] [2023-11-12 02:14:22,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409087281] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 02:14:22,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515008425] [2023-11-12 02:14:22,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-12 02:14:22,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:14:22,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:14:22,743 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:14:22,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:14:23,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-12 02:14:23,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-12 02:14:23,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-12 02:14:23,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:14:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 26 proven. 21 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-12 02:14:23,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:14:24,446 INFO L322 Elim1Store]: treesize reduction 12, result has 95.0 percent of original size [2023-11-12 02:14:24,447 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 12 new quantified variables, introduced 15 case distinctions, treesize of input 184 treesize of output 333 [2023-11-12 02:14:24,803 INFO L322 Elim1Store]: treesize reduction 33, result has 81.9 percent of original size [2023-11-12 02:14:24,803 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 374 treesize of output 330 [2023-11-12 02:14:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-12 02:14:38,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515008425] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:14:38,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-12 02:14:38,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 12] total 39 [2023-11-12 02:14:38,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40318789] [2023-11-12 02:14:38,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-12 02:14:38,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-12 02:14:38,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:14:38,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-12 02:14:38,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2023-11-12 02:14:38,724 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 37 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-12 02:14:41,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:14:41,274 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2023-11-12 02:14:41,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 02:14:41,275 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 37 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 54 [2023-11-12 02:14:41,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:14:41,276 INFO L225 Difference]: With dead ends: 82 [2023-11-12 02:14:41,276 INFO L226 Difference]: Without dead ends: 61 [2023-11-12 02:14:41,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=360, Invalid=3300, Unknown=0, NotChecked=0, Total=3660 [2023-11-12 02:14:41,279 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:14:41,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 341 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:14:41,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-12 02:14:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2023-11-12 02:14:41,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-12 02:14:41,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2023-11-12 02:14:41,292 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 54 [2023-11-12 02:14:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:14:41,293 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2023-11-12 02:14:41,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 37 states have internal predecessors, (78), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-12 02:14:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2023-11-12 02:14:41,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-12 02:14:41,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:14:41,295 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:14:41,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:14:41,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_349248d6-259b-493f-8020-b27a2c595f47/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:14:41,502 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:14:41,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:14:41,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1042924030, now seen corresponding path program 6 times [2023-11-12 02:14:41,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:14:41,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607086610] [2023-11-12 02:14:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:14:41,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:14:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat