./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 954b1f05390ccaafb1cee97c6b5216f4167723fe344c33082a0f73951b4d6f58 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:11:33,852 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:11:33,931 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:11:33,937 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:11:33,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:11:33,968 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:11:33,968 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:11:33,969 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:11:33,970 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:11:33,971 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:11:33,971 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:11:33,972 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:11:33,972 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:11:33,973 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:11:33,974 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:11:33,974 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:11:33,975 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:11:33,975 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:11:33,976 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:11:33,977 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:11:33,977 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:11:33,978 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:11:33,979 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:11:33,979 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:11:33,980 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:11:33,980 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:11:33,981 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:11:33,981 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:11:33,982 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:11:33,982 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:11:33,982 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:11:33,983 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:11:33,983 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:11:33,984 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:11:33,984 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:11:33,984 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:11:33,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:11:33,985 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:11:33,985 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:11:33,985 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:11:33,986 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:11:33,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:11:33,986 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:11:33,986 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:11:33,987 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:11:33,987 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 954b1f05390ccaafb1cee97c6b5216f4167723fe344c33082a0f73951b4d6f58 [2023-11-19 05:11:34,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:11:34,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:11:34,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:11:34,264 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:11:34,265 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:11:34,267 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c [2023-11-19 05:11:37,519 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:11:38,343 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:11:38,343 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c [2023-11-19 05:11:38,401 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/data/2b8ba1445/9ec98dad75584741963b9a25ae78c908/FLAG04eda57ac [2023-11-19 05:11:38,419 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/data/2b8ba1445/9ec98dad75584741963b9a25ae78c908 [2023-11-19 05:11:38,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:11:38,424 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:11:38,426 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:11:38,426 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:11:38,468 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:11:38,469 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:11:38" (1/1) ... [2023-11-19 05:11:38,470 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@794d39ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:38, skipping insertion in model container [2023-11-19 05:11:38,470 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:11:38" (1/1) ... [2023-11-19 05:11:38,751 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:11:41,275 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_1fe44335-079e-4e7d-8651-8db81eb6bab5/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c[378560,378573] [2023-11-19 05:11:41,310 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_1fe44335-079e-4e7d-8651-8db81eb6bab5/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c[383339,383352] [2023-11-19 05:11:41,579 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:11:41,593 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:11:42,950 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_1fe44335-079e-4e7d-8651-8db81eb6bab5/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c[378560,378573] [2023-11-19 05:11:42,959 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_1fe44335-079e-4e7d-8651-8db81eb6bab5/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-2.c[383339,383352] [2023-11-19 05:11:42,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:11:43,094 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:11:43,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:43 WrapperNode [2023-11-19 05:11:43,095 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:11:43,096 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:11:43,096 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:11:43,096 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:11:43,105 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:43" (1/1) ... [2023-11-19 05:11:43,249 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:43" (1/1) ... [2023-11-19 05:11:43,691 INFO L138 Inliner]: procedures = 48, calls = 48, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 12634 [2023-11-19 05:11:43,691 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:11:43,692 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:11:43,692 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:11:43,692 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:11:43,721 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:43" (1/1) ... [2023-11-19 05:11:43,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:43" (1/1) ... [2023-11-19 05:11:43,783 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:43" (1/1) ... [2023-11-19 05:11:43,783 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:43" (1/1) ... [2023-11-19 05:11:44,147 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:43" (1/1) ... [2023-11-19 05:11:44,251 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:43" (1/1) ... [2023-11-19 05:11:44,331 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:43" (1/1) ... [2023-11-19 05:11:44,351 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:43" (1/1) ... [2023-11-19 05:11:44,424 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:11:44,430 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:11:44,430 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:11:44,430 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:11:44,431 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:43" (1/1) ... [2023-11-19 05:11:44,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:11:44,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:11:44,474 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:11:44,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:11:44,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:11:44,613 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-19 05:11:44,614 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-19 05:11:44,616 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 05:11:44,616 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 05:11:44,616 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 05:11:44,617 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 05:11:44,617 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:11:44,618 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:11:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 05:11:44,618 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 05:11:44,618 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 05:11:44,619 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 05:11:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:11:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 05:11:44,619 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 05:11:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:11:44,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:11:44,763 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:11:44,766 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:11:55,846 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:11:58,691 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:11:58,693 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-19 05:11:58,717 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:11:58 BoogieIcfgContainer [2023-11-19 05:11:58,718 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:11:58,723 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:11:58,724 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:11:58,728 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:11:58,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:11:38" (1/3) ... [2023-11-19 05:11:58,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673a2324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:11:58, skipping insertion in model container [2023-11-19 05:11:58,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:11:43" (2/3) ... [2023-11-19 05:11:58,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673a2324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:11:58, skipping insertion in model container [2023-11-19 05:11:58,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:11:58" (3/3) ... [2023-11-19 05:11:58,736 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.02.cil-2.c [2023-11-19 05:11:58,764 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:11:58,764 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:11:58,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:11:58,918 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=FINITE_AUTOMATA, 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;@3b664958, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:11:58,918 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:11:58,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 1730 states, 1702 states have (on average 1.9753231492361927) internal successors, (3362), 1707 states have internal predecessors, (3362), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-19 05:11:58,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 05:11:58,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:11:58,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:11:58,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:11:58,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:11:58,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1657494942, now seen corresponding path program 1 times [2023-11-19 05:11:58,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:11:58,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120670666] [2023-11-19 05:11:58,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:11:58,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:11:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:11:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:11:59,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:11:59,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120670666] [2023-11-19 05:11:59,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120670666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:11:59,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:11:59,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:11:59,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485932719] [2023-11-19 05:11:59,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:11:59,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:11:59,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:11:59,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:11:59,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:11:59,645 INFO L87 Difference]: Start difference. First operand has 1730 states, 1702 states have (on average 1.9753231492361927) internal successors, (3362), 1707 states have internal predecessors, (3362), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:12:00,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:00,927 INFO L93 Difference]: Finished difference Result 3523 states and 6896 transitions. [2023-11-19 05:12:00,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:12:00,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2023-11-19 05:12:00,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:00,967 INFO L225 Difference]: With dead ends: 3523 [2023-11-19 05:12:00,967 INFO L226 Difference]: Without dead ends: 1792 [2023-11-19 05:12:00,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:12:00,988 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3463 mSDsluCounter, 3164 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 6388 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:00,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 6388 Invalid, 584 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 05:12:01,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2023-11-19 05:12:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1791. [2023-11-19 05:12:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1791 states, 1747 states have (on average 1.953062392673154) internal successors, (3412), 1751 states have internal predecessors, (3412), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-19 05:12:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1791 states to 1791 states and 3470 transitions. [2023-11-19 05:12:01,219 INFO L78 Accepts]: Start accepts. Automaton has 1791 states and 3470 transitions. Word has length 38 [2023-11-19 05:12:01,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:01,220 INFO L495 AbstractCegarLoop]: Abstraction has 1791 states and 3470 transitions. [2023-11-19 05:12:01,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:12:01,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1791 states and 3470 transitions. [2023-11-19 05:12:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 05:12:01,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:01,238 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:01,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:12:01,239 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:01,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:01,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1648218271, now seen corresponding path program 1 times [2023-11-19 05:12:01,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:01,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344343324] [2023-11-19 05:12:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:01,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:12:01,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:01,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344343324] [2023-11-19 05:12:01,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344343324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:01,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296708117] [2023-11-19 05:12:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:01,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:01,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:01,461 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:01,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:12:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:01,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:01,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-19 05:12:01,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:01,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296708117] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:01,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:01,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:12:01,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287540553] [2023-11-19 05:12:01,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:01,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:01,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:01,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:01,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:01,724 INFO L87 Difference]: Start difference. First operand 1791 states and 3470 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:12:02,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:02,483 INFO L93 Difference]: Finished difference Result 2074 states and 3857 transitions. [2023-11-19 05:12:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:02,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2023-11-19 05:12:02,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:02,509 INFO L225 Difference]: With dead ends: 2074 [2023-11-19 05:12:02,510 INFO L226 Difference]: Without dead ends: 1929 [2023-11-19 05:12:02,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:02,517 INFO L413 NwaCegarLoop]: 3189 mSDtfsCounter, 3359 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3359 SdHoareTripleChecker+Valid, 3274 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:02,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3359 Valid, 3274 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:12:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2023-11-19 05:12:02,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1923. [2023-11-19 05:12:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1845 states have (on average 1.9192411924119241) internal successors, (3541), 1850 states have internal predecessors, (3541), 52 states have call successors, (52), 25 states have call predecessors, (52), 24 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-19 05:12:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 3643 transitions. [2023-11-19 05:12:02,654 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 3643 transitions. Word has length 68 [2023-11-19 05:12:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:02,655 INFO L495 AbstractCegarLoop]: Abstraction has 1923 states and 3643 transitions. [2023-11-19 05:12:02,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:12:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 3643 transitions. [2023-11-19 05:12:02,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-19 05:12:02,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:02,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:02,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:02,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:02,896 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:02,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:02,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1044487167, now seen corresponding path program 1 times [2023-11-19 05:12:02,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:02,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607767564] [2023-11-19 05:12:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:02,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:03,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:12:03,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:03,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607767564] [2023-11-19 05:12:03,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607767564] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:03,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:03,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 05:12:03,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454418603] [2023-11-19 05:12:03,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:03,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:12:03,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:03,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:12:03,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:03,611 INFO L87 Difference]: Start difference. First operand 1923 states and 3643 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:12:05,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:05,049 INFO L93 Difference]: Finished difference Result 2485 states and 4385 transitions. [2023-11-19 05:12:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 05:12:05,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 68 [2023-11-19 05:12:05,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:05,078 INFO L225 Difference]: With dead ends: 2485 [2023-11-19 05:12:05,079 INFO L226 Difference]: Without dead ends: 2209 [2023-11-19 05:12:05,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 05:12:05,087 INFO L413 NwaCegarLoop]: 3159 mSDtfsCounter, 3513 mSDsluCounter, 9369 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3524 SdHoareTripleChecker+Valid, 12528 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:05,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3524 Valid, 12528 Invalid, 1111 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [78 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 05:12:05,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2209 states. [2023-11-19 05:12:05,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2209 to 2171. [2023-11-19 05:12:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2171 states, 2027 states have (on average 1.8623581647755303) internal successors, (3775), 2034 states have internal predecessors, (3775), 94 states have call successors, (94), 49 states have call predecessors, (94), 48 states have return successors, (92), 88 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-19 05:12:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 3961 transitions. [2023-11-19 05:12:05,270 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 3961 transitions. Word has length 68 [2023-11-19 05:12:05,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:05,273 INFO L495 AbstractCegarLoop]: Abstraction has 2171 states and 3961 transitions. [2023-11-19 05:12:05,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-19 05:12:05,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 3961 transitions. [2023-11-19 05:12:05,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 05:12:05,281 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:05,281 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:05,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:12:05,282 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:05,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:05,283 INFO L85 PathProgramCache]: Analyzing trace with hash 864211484, now seen corresponding path program 1 times [2023-11-19 05:12:05,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:05,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339170923] [2023-11-19 05:12:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:05,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 05:12:05,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:05,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339170923] [2023-11-19 05:12:05,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339170923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:05,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:05,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:12:05,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028921532] [2023-11-19 05:12:05,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:05,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:05,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:05,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:05,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:05,453 INFO L87 Difference]: Start difference. First operand 2171 states and 3961 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:12:06,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:06,209 INFO L93 Difference]: Finished difference Result 2584 states and 4508 transitions. [2023-11-19 05:12:06,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:06,210 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2023-11-19 05:12:06,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:06,235 INFO L225 Difference]: With dead ends: 2584 [2023-11-19 05:12:06,235 INFO L226 Difference]: Without dead ends: 2304 [2023-11-19 05:12:06,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:06,249 INFO L413 NwaCegarLoop]: 3192 mSDtfsCounter, 37 mSDsluCounter, 3151 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 6343 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:06,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 6343 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:12:06,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2023-11-19 05:12:06,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 2241. [2023-11-19 05:12:06,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2089 states have (on average 1.8492101483963619) internal successors, (3863), 2096 states have internal predecessors, (3863), 98 states have call successors, (98), 53 states have call predecessors, (98), 52 states have return successors, (96), 92 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-19 05:12:06,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 4057 transitions. [2023-11-19 05:12:06,422 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 4057 transitions. Word has length 70 [2023-11-19 05:12:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:06,424 INFO L495 AbstractCegarLoop]: Abstraction has 2241 states and 4057 transitions. [2023-11-19 05:12:06,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 05:12:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 4057 transitions. [2023-11-19 05:12:06,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-19 05:12:06,431 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:06,432 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:06,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:12:06,432 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:06,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:06,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1458871145, now seen corresponding path program 1 times [2023-11-19 05:12:06,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:06,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111962577] [2023-11-19 05:12:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:06,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 05:12:06,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:06,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111962577] [2023-11-19 05:12:06,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111962577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:06,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:06,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:12:06,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728606348] [2023-11-19 05:12:06,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:06,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:06,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:06,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:06,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:06,550 INFO L87 Difference]: Start difference. First operand 2241 states and 4057 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:12:07,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:07,185 INFO L93 Difference]: Finished difference Result 3133 states and 5240 transitions. [2023-11-19 05:12:07,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:07,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 89 [2023-11-19 05:12:07,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:07,210 INFO L225 Difference]: With dead ends: 3133 [2023-11-19 05:12:07,210 INFO L226 Difference]: Without dead ends: 2538 [2023-11-19 05:12:07,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:07,218 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 3351 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3351 SdHoareTripleChecker+Valid, 3275 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:07,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3351 Valid, 3275 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:12:07,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2023-11-19 05:12:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2528. [2023-11-19 05:12:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2306 states have (on average 1.794882914137034) internal successors, (4139), 2315 states have internal predecessors, (4139), 142 states have call successors, (142), 79 states have call predecessors, (142), 78 states have return successors, (140), 134 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-19 05:12:07,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 4421 transitions. [2023-11-19 05:12:07,408 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 4421 transitions. Word has length 89 [2023-11-19 05:12:07,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:07,409 INFO L495 AbstractCegarLoop]: Abstraction has 2528 states and 4421 transitions. [2023-11-19 05:12:07,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-19 05:12:07,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 4421 transitions. [2023-11-19 05:12:07,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 05:12:07,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:07,425 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:07,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:12:07,426 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:07,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:07,428 INFO L85 PathProgramCache]: Analyzing trace with hash 741431372, now seen corresponding path program 1 times [2023-11-19 05:12:07,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:07,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067057299] [2023-11-19 05:12:07,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:07,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 05:12:07,616 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:07,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067057299] [2023-11-19 05:12:07,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067057299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:07,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523369852] [2023-11-19 05:12:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:07,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:07,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:07,619 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:07,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:12:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:07,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:07,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:07,856 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:12:07,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:07,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523369852] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:07,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:07,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:12:07,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791885746] [2023-11-19 05:12:07,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:07,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:07,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:07,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:07,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:07,860 INFO L87 Difference]: Start difference. First operand 2528 states and 4421 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:12:08,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:08,562 INFO L93 Difference]: Finished difference Result 3313 states and 5463 transitions. [2023-11-19 05:12:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:08,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 102 [2023-11-19 05:12:08,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:08,586 INFO L225 Difference]: With dead ends: 3313 [2023-11-19 05:12:08,586 INFO L226 Difference]: Without dead ends: 2719 [2023-11-19 05:12:08,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:08,591 INFO L413 NwaCegarLoop]: 3188 mSDtfsCounter, 54 mSDsluCounter, 3152 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 6340 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:08,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 6340 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:12:08,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2719 states. [2023-11-19 05:12:08,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2719 to 2617. [2023-11-19 05:12:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2617 states, 2383 states have (on average 1.7838858581619808) internal successors, (4251), 2392 states have internal predecessors, (4251), 148 states have call successors, (148), 85 states have call predecessors, (148), 84 states have return successors, (146), 140 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-19 05:12:08,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2617 states to 2617 states and 4545 transitions. [2023-11-19 05:12:08,788 INFO L78 Accepts]: Start accepts. Automaton has 2617 states and 4545 transitions. Word has length 102 [2023-11-19 05:12:08,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:08,789 INFO L495 AbstractCegarLoop]: Abstraction has 2617 states and 4545 transitions. [2023-11-19 05:12:08,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:12:08,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2617 states and 4545 transitions. [2023-11-19 05:12:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 05:12:08,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:08,796 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:08,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:09,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:12:09,013 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:09,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:09,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1163724898, now seen corresponding path program 2 times [2023-11-19 05:12:09,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:09,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056405658] [2023-11-19 05:12:09,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:09,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:12:09,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:09,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056405658] [2023-11-19 05:12:09,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056405658] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:09,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911318718] [2023-11-19 05:12:09,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 05:12:09,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:09,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:09,410 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:09,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:12:09,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 05:12:09,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:12:09,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:12:09,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-19 05:12:09,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:09,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911318718] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:09,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:09,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:12:09,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330485231] [2023-11-19 05:12:09,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:09,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:09,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:09,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:09,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:12:09,724 INFO L87 Difference]: Start difference. First operand 2617 states and 4545 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:12:10,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:10,450 INFO L93 Difference]: Finished difference Result 3308 states and 5495 transitions. [2023-11-19 05:12:10,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:10,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 102 [2023-11-19 05:12:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:10,472 INFO L225 Difference]: With dead ends: 3308 [2023-11-19 05:12:10,472 INFO L226 Difference]: Without dead ends: 2625 [2023-11-19 05:12:10,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:12:10,477 INFO L413 NwaCegarLoop]: 3190 mSDtfsCounter, 95 mSDsluCounter, 3142 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 6332 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:10,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 6332 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-19 05:12:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2023-11-19 05:12:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 2613. [2023-11-19 05:12:10,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2379 states have (on average 1.776796973518285) internal successors, (4227), 2388 states have internal predecessors, (4227), 148 states have call successors, (148), 85 states have call predecessors, (148), 84 states have return successors, (146), 140 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-19 05:12:10,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 4521 transitions. [2023-11-19 05:12:10,614 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 4521 transitions. Word has length 102 [2023-11-19 05:12:10,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:10,614 INFO L495 AbstractCegarLoop]: Abstraction has 2613 states and 4521 transitions. [2023-11-19 05:12:10,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:12:10,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 4521 transitions. [2023-11-19 05:12:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-19 05:12:10,620 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:10,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:10,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:10,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:10,846 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:10,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:10,846 INFO L85 PathProgramCache]: Analyzing trace with hash -907894300, now seen corresponding path program 1 times [2023-11-19 05:12:10,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:10,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102900379] [2023-11-19 05:12:10,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:10,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:12:11,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:11,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102900379] [2023-11-19 05:12:11,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102900379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:11,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180757010] [2023-11-19 05:12:11,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:11,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:11,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:11,159 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:11,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:12:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:11,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:11,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 05:12:11,373 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:11,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180757010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:11,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:11,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:12:11,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923908467] [2023-11-19 05:12:11,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:11,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:11,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:11,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:11,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:12:11,377 INFO L87 Difference]: Start difference. First operand 2613 states and 4521 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:12:11,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:11,989 INFO L93 Difference]: Finished difference Result 3437 states and 5580 transitions. [2023-11-19 05:12:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:11,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 102 [2023-11-19 05:12:11,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:12,013 INFO L225 Difference]: With dead ends: 3437 [2023-11-19 05:12:12,013 INFO L226 Difference]: Without dead ends: 2789 [2023-11-19 05:12:12,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:12:12,019 INFO L413 NwaCegarLoop]: 3159 mSDtfsCounter, 3361 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3361 SdHoareTripleChecker+Valid, 3178 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:12,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3361 Valid, 3178 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:12:12,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2023-11-19 05:12:12,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2789. [2023-11-19 05:12:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2527 states have (on average 1.738425009893154) internal successors, (4393), 2536 states have internal predecessors, (4393), 156 states have call successors, (156), 105 states have call predecessors, (156), 104 states have return successors, (154), 148 states have call predecessors, (154), 154 states have call successors, (154) [2023-11-19 05:12:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 4703 transitions. [2023-11-19 05:12:12,159 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 4703 transitions. Word has length 102 [2023-11-19 05:12:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:12,160 INFO L495 AbstractCegarLoop]: Abstraction has 2789 states and 4703 transitions. [2023-11-19 05:12:12,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:12:12,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 4703 transitions. [2023-11-19 05:12:12,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-19 05:12:12,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:12,166 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:12,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:12,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:12,386 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:12,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:12,387 INFO L85 PathProgramCache]: Analyzing trace with hash -259538551, now seen corresponding path program 1 times [2023-11-19 05:12:12,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:12,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559059940] [2023-11-19 05:12:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:12,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:12:12,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:12,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559059940] [2023-11-19 05:12:12,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559059940] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:12,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045514552] [2023-11-19 05:12:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:12,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:12,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:12,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:12,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:12:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:12,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:12:12,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:12:12,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:12,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045514552] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:12,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:12,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-19 05:12:12,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711064166] [2023-11-19 05:12:12,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:12,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:12,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:12,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:12,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:12:12,822 INFO L87 Difference]: Start difference. First operand 2789 states and 4703 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:12:13,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:13,422 INFO L93 Difference]: Finished difference Result 4363 states and 6696 transitions. [2023-11-19 05:12:13,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:13,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 103 [2023-11-19 05:12:13,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:13,443 INFO L225 Difference]: With dead ends: 4363 [2023-11-19 05:12:13,443 INFO L226 Difference]: Without dead ends: 3221 [2023-11-19 05:12:13,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:12:13,448 INFO L413 NwaCegarLoop]: 3165 mSDtfsCounter, 50 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 6298 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:13,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 6298 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:12:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3221 states. [2023-11-19 05:12:13,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3221 to 2919. [2023-11-19 05:12:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2919 states, 2637 states have (on average 1.7235494880546076) internal successors, (4545), 2647 states have internal predecessors, (4545), 166 states have call successors, (166), 115 states have call predecessors, (166), 114 states have return successors, (164), 157 states have call predecessors, (164), 164 states have call successors, (164) [2023-11-19 05:12:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2919 states to 2919 states and 4875 transitions. [2023-11-19 05:12:13,588 INFO L78 Accepts]: Start accepts. Automaton has 2919 states and 4875 transitions. Word has length 103 [2023-11-19 05:12:13,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:13,588 INFO L495 AbstractCegarLoop]: Abstraction has 2919 states and 4875 transitions. [2023-11-19 05:12:13,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-19 05:12:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 2919 states and 4875 transitions. [2023-11-19 05:12:13,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-19 05:12:13,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:13,594 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:13,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:13,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:13,815 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:13,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:13,816 INFO L85 PathProgramCache]: Analyzing trace with hash 512203986, now seen corresponding path program 1 times [2023-11-19 05:12:13,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:13,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727448487] [2023-11-19 05:12:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:13,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-19 05:12:13,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:13,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727448487] [2023-11-19 05:12:13,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727448487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:13,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779107490] [2023-11-19 05:12:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:13,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:13,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:13,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:14,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:12:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:14,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 05:12:14,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:14,289 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 05:12:14,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:14,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779107490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:14,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:14,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-19 05:12:14,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546595524] [2023-11-19 05:12:14,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:14,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:12:14,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:14,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:12:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:12:14,294 INFO L87 Difference]: Start difference. First operand 2919 states and 4875 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 05:12:15,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:15,069 INFO L93 Difference]: Finished difference Result 4015 states and 6270 transitions. [2023-11-19 05:12:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:12:15,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 105 [2023-11-19 05:12:15,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:15,098 INFO L225 Difference]: With dead ends: 4015 [2023-11-19 05:12:15,099 INFO L226 Difference]: Without dead ends: 3351 [2023-11-19 05:12:15,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-19 05:12:15,102 INFO L413 NwaCegarLoop]: 3208 mSDtfsCounter, 3393 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 3310 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:15,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 3310 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:12:15,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2023-11-19 05:12:15,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 3170. [2023-11-19 05:12:15,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 2855 states have (on average 1.6788091068301225) internal successors, (4793), 2867 states have internal predecessors, (4793), 176 states have call successors, (176), 138 states have call predecessors, (176), 137 states have return successors, (184), 165 states have call predecessors, (184), 174 states have call successors, (184) [2023-11-19 05:12:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 5153 transitions. [2023-11-19 05:12:15,270 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 5153 transitions. Word has length 105 [2023-11-19 05:12:15,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:15,271 INFO L495 AbstractCegarLoop]: Abstraction has 3170 states and 5153 transitions. [2023-11-19 05:12:15,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-19 05:12:15,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 5153 transitions. [2023-11-19 05:12:15,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 05:12:15,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:15,277 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:15,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:12:15,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:15,492 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:15,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:15,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1605301705, now seen corresponding path program 1 times [2023-11-19 05:12:15,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:15,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693443396] [2023-11-19 05:12:15,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:15,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 05:12:15,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:15,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693443396] [2023-11-19 05:12:15,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693443396] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:15,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805000391] [2023-11-19 05:12:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:15,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:15,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:15,606 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:15,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:12:15,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:15,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:12:15,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:12:15,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:15,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805000391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:15,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:15,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-19 05:12:15,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940452399] [2023-11-19 05:12:15,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:15,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:15,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:15,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:15,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:15,780 INFO L87 Difference]: Start difference. First operand 3170 states and 5153 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:12:16,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:16,463 INFO L93 Difference]: Finished difference Result 4497 states and 6834 transitions. [2023-11-19 05:12:16,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:16,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 106 [2023-11-19 05:12:16,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:16,478 INFO L225 Difference]: With dead ends: 4497 [2023-11-19 05:12:16,478 INFO L226 Difference]: Without dead ends: 3705 [2023-11-19 05:12:16,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:16,483 INFO L413 NwaCegarLoop]: 3212 mSDtfsCounter, 57 mSDsluCounter, 3153 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 6365 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:16,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 6365 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:12:16,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3705 states. [2023-11-19 05:12:16,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3705 to 3396. [2023-11-19 05:12:16,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 3045 states have (on average 1.652216748768473) internal successors, (5031), 3057 states have internal predecessors, (5031), 194 states have call successors, (194), 156 states have call predecessors, (194), 155 states have return successors, (202), 183 states have call predecessors, (202), 192 states have call successors, (202) [2023-11-19 05:12:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 5427 transitions. [2023-11-19 05:12:16,669 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 5427 transitions. Word has length 106 [2023-11-19 05:12:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:16,670 INFO L495 AbstractCegarLoop]: Abstraction has 3396 states and 5427 transitions. [2023-11-19 05:12:16,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-19 05:12:16,671 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 5427 transitions. [2023-11-19 05:12:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-19 05:12:16,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:16,677 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:16,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-19 05:12:16,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-19 05:12:16,894 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:16,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:16,894 INFO L85 PathProgramCache]: Analyzing trace with hash -845371424, now seen corresponding path program 1 times [2023-11-19 05:12:16,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:16,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149001129] [2023-11-19 05:12:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:16,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:17,124 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-19 05:12:17,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:17,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149001129] [2023-11-19 05:12:17,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149001129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:12:17,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145703572] [2023-11-19 05:12:17,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:17,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:12:17,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:17,130 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:12:17,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fe44335-079e-4e7d-8651-8db81eb6bab5/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 05:12:17,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:17,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 05:12:17,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:12:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-19 05:12:17,362 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:12:17,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145703572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:17,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:12:17,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2023-11-19 05:12:17,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619687371] [2023-11-19 05:12:17,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:17,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:12:17,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:17,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:12:17,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:12:17,365 INFO L87 Difference]: Start difference. First operand 3396 states and 5427 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)