./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/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_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/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_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/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 6167950643e67727b303c7b99fc0839aa2067301d926538b67f3f160c480440e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:08:35,748 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:08:35,825 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 05:08:35,832 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:08:35,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:08:35,860 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:08:35,860 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:08:35,861 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:08:35,862 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:08:35,863 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:08:35,864 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:08:35,864 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:08:35,865 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:08:35,866 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:08:35,866 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:08:35,867 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:08:35,868 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:08:35,868 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:08:35,869 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:08:35,870 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:08:35,871 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:08:35,871 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:08:35,873 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:08:35,873 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:08:35,874 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:08:35,875 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:08:35,875 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:08:35,876 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:08:35,877 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:08:35,877 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:08:35,878 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:08:35,879 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:08:35,879 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:08:35,880 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:08:35,880 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:08:35,881 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:08:35,904 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:08:35,905 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:08:35,905 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:08:35,906 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:08:35,906 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:08:35,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:08:35,907 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:08:35,907 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:08:35,908 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:08:35,908 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_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6167950643e67727b303c7b99fc0839aa2067301d926538b67f3f160c480440e [2023-11-19 05:08:36,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:08:36,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:08:36,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:08:36,262 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:08:36,262 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:08:36,265 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c [2023-11-19 05:08:39,345 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:08:40,237 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:08:40,238 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c [2023-11-19 05:08:40,299 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/data/9aa99411e/a83f3d58de3d4ce38a6f0edf836b67af/FLAG853d7a950 [2023-11-19 05:08:40,318 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/data/9aa99411e/a83f3d58de3d4ce38a6f0edf836b67af [2023-11-19 05:08:40,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:08:40,328 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:08:40,331 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:08:40,331 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:08:40,337 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:08:40,338 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:08:40" (1/1) ... [2023-11-19 05:08:40,339 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b9d86d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:40, skipping insertion in model container [2023-11-19 05:08:40,340 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:08:40" (1/1) ... [2023-11-19 05:08:40,663 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:08:43,251 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_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c[376251,376264] [2023-11-19 05:08:43,293 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_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c[383339,383352] [2023-11-19 05:08:43,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:08:43,731 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:08:44,967 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_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c[376251,376264] [2023-11-19 05:08:44,978 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_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/sv-benchmarks/c/combinations/Problem05_label41+token_ring.13.cil-2.c[383339,383352] [2023-11-19 05:08:45,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:08:45,084 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:08:45,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:45 WrapperNode [2023-11-19 05:08:45,085 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:08:45,086 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:08:45,086 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:08:45,086 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:08:45,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:45" (1/1) ... [2023-11-19 05:08:45,187 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:45" (1/1) ... [2023-11-19 05:08:45,596 INFO L138 Inliner]: procedures = 70, calls = 80, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 13288 [2023-11-19 05:08:45,597 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:08:45,598 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:08:45,598 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:08:45,598 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:08:45,610 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:45" (1/1) ... [2023-11-19 05:08:45,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:45" (1/1) ... [2023-11-19 05:08:45,694 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:45" (1/1) ... [2023-11-19 05:08:45,695 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:45" (1/1) ... [2023-11-19 05:08:45,993 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:45" (1/1) ... [2023-11-19 05:08:46,037 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:45" (1/1) ... [2023-11-19 05:08:46,072 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:45" (1/1) ... [2023-11-19 05:08:46,101 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:45" (1/1) ... [2023-11-19 05:08:46,179 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:08:46,249 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:08:46,249 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:08:46,249 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:08:46,250 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:45" (1/1) ... [2023-11-19 05:08:46,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:08:46,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:08:46,290 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:08:46,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:08:46,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:08:46,328 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-19 05:08:46,328 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-19 05:08:46,328 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 05:08:46,329 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 05:08:46,329 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-19 05:08:46,329 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-19 05:08:46,329 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-19 05:08:46,329 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-19 05:08:46,330 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-19 05:08:46,330 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-19 05:08:46,330 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-19 05:08:46,330 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-19 05:08:46,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:08:46,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:08:46,331 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:08:46,482 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:08:46,484 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:08:56,165 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:08:58,967 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:08:58,967 INFO L302 CfgBuilder]: Removed 17 assume(true) statements. [2023-11-19 05:08:58,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:08:58 BoogieIcfgContainer [2023-11-19 05:08:58,993 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:08:58,996 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:08:58,996 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:08:58,999 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:08:59,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:08:40" (1/3) ... [2023-11-19 05:08:59,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e851f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:08:59, skipping insertion in model container [2023-11-19 05:08:59,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:45" (2/3) ... [2023-11-19 05:08:59,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e851f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:08:59, skipping insertion in model container [2023-11-19 05:08:59,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:08:58" (3/3) ... [2023-11-19 05:08:59,005 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label41+token_ring.13.cil-2.c [2023-11-19 05:08:59,026 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:08:59,027 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 05:08:59,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:08:59,149 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;@7cbf82c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:08:59,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 05:08:59,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 1856 states, 1820 states have (on average 1.9467032967032967) internal successors, (3543), 1823 states have internal predecessors, (3543), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-11-19 05:08:59,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 05:08:59,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:08:59,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:08:59,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:08:59,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:08:59,181 INFO L85 PathProgramCache]: Analyzing trace with hash -698595990, now seen corresponding path program 1 times [2023-11-19 05:08:59,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:08:59,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24088440] [2023-11-19 05:08:59,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:08:59,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:08:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:08:59,842 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 05:08:59,843 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:08:59,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24088440] [2023-11-19 05:08:59,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24088440] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:08:59,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:08:59,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:08:59,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174424224] [2023-11-19 05:08:59,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:08:59,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:08:59,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:08:59,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:08:59,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:08:59,918 INFO L87 Difference]: Start difference. First operand has 1856 states, 1820 states have (on average 1.9467032967032967) internal successors, (3543), 1823 states have internal predecessors, (3543), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:09:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:01,299 INFO L93 Difference]: Finished difference Result 3908 states and 7525 transitions. [2023-11-19 05:09:01,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 05:09:01,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2023-11-19 05:09:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:01,337 INFO L225 Difference]: With dead ends: 3908 [2023-11-19 05:09:01,337 INFO L226 Difference]: Without dead ends: 2051 [2023-11-19 05:09:01,349 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 05:09:01,356 INFO L413 NwaCegarLoop]: 3569 mSDtfsCounter, 3840 mSDsluCounter, 3467 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3840 SdHoareTripleChecker+Valid, 7036 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:01,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3840 Valid, 7036 Invalid, 756 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 05:09:01,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2023-11-19 05:09:01,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 2050. [2023-11-19 05:09:01,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2050 states, 1986 states have (on average 1.903323262839879) internal successors, (3780), 1989 states have internal predecessors, (3780), 50 states have call successors, (50), 12 states have call predecessors, (50), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-19 05:09:01,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2050 states to 2050 states and 3880 transitions. [2023-11-19 05:09:01,547 INFO L78 Accepts]: Start accepts. Automaton has 2050 states and 3880 transitions. Word has length 70 [2023-11-19 05:09:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:01,548 INFO L495 AbstractCegarLoop]: Abstraction has 2050 states and 3880 transitions. [2023-11-19 05:09:01,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-19 05:09:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 2050 states and 3880 transitions. [2023-11-19 05:09:01,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:09:01,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:01,562 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:09:01,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:09:01,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:09:01,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:01,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1897666250, now seen corresponding path program 1 times [2023-11-19 05:09:01,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:09:01,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175561766] [2023-11-19 05:09:01,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:01,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:09:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:09:02,038 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:09:02,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175561766] [2023-11-19 05:09:02,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175561766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:09:02,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735963429] [2023-11-19 05:09:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:02,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:02,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:09:02,043 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:09:02,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 05:09:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:02,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:09:02,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 05:09:02,461 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:09:02,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735963429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:02,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:09:02,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:09:02,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246222010] [2023-11-19 05:09:02,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:02,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:09:02,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:09:02,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:09:02,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:09:02,466 INFO L87 Difference]: Start difference. First operand 2050 states and 3880 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:09:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:03,109 INFO L93 Difference]: Finished difference Result 2851 states and 5109 transitions. [2023-11-19 05:09:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:09:03,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2023-11-19 05:09:03,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:03,131 INFO L225 Difference]: With dead ends: 2851 [2023-11-19 05:09:03,131 INFO L226 Difference]: Without dead ends: 2447 [2023-11-19 05:09:03,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 05:09:03,135 INFO L413 NwaCegarLoop]: 3373 mSDtfsCounter, 3539 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3539 SdHoareTripleChecker+Valid, 3627 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:03,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3539 Valid, 3627 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:09:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2023-11-19 05:09:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2443. [2023-11-19 05:09:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2323 states have (on average 1.8411536805854498) internal successors, (4277), 2327 states have internal predecessors, (4277), 94 states have call successors, (94), 24 states have call predecessors, (94), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-19 05:09:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 4465 transitions. [2023-11-19 05:09:03,248 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 4465 transitions. Word has length 144 [2023-11-19 05:09:03,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:03,250 INFO L495 AbstractCegarLoop]: Abstraction has 2443 states and 4465 transitions. [2023-11-19 05:09:03,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:09:03,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 4465 transitions. [2023-11-19 05:09:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:09:03,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:03,259 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:09:03,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 05:09:03,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:03,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:09:03,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:03,473 INFO L85 PathProgramCache]: Analyzing trace with hash 910983944, now seen corresponding path program 1 times [2023-11-19 05:09:03,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:09:03,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872835696] [2023-11-19 05:09:03,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:03,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:09:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:03,740 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:09:03,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:09:03,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872835696] [2023-11-19 05:09:03,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872835696] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:09:03,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191322912] [2023-11-19 05:09:03,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:03,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:03,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:09:03,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:09:03,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 05:09:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:04,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:09:04,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-19 05:09:04,113 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:09:04,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191322912] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:04,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:09:04,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:09:04,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726034681] [2023-11-19 05:09:04,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:04,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:09:04,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:09:04,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:09:04,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:09:04,128 INFO L87 Difference]: Start difference. First operand 2443 states and 4465 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:09:04,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:04,758 INFO L93 Difference]: Finished difference Result 4024 states and 6884 transitions. [2023-11-19 05:09:04,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:09:04,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2023-11-19 05:09:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:04,782 INFO L225 Difference]: With dead ends: 4024 [2023-11-19 05:09:04,782 INFO L226 Difference]: Without dead ends: 3227 [2023-11-19 05:09:04,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 05:09:04,788 INFO L413 NwaCegarLoop]: 3371 mSDtfsCounter, 3551 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3551 SdHoareTripleChecker+Valid, 3625 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:04,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3551 Valid, 3625 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:09:04,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2023-11-19 05:09:05,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 3221. [2023-11-19 05:09:05,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3221 states, 2991 states have (on average 1.7582748244734203) internal successors, (5259), 2997 states have internal predecessors, (5259), 180 states have call successors, (180), 48 states have call predecessors, (180), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2023-11-19 05:09:05,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3221 states to 3221 states and 5619 transitions. [2023-11-19 05:09:05,123 INFO L78 Accepts]: Start accepts. Automaton has 3221 states and 5619 transitions. Word has length 144 [2023-11-19 05:09:05,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:05,123 INFO L495 AbstractCegarLoop]: Abstraction has 3221 states and 5619 transitions. [2023-11-19 05:09:05,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:09:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3221 states and 5619 transitions. [2023-11-19 05:09:05,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:09:05,132 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:05,132 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:09:05,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 05:09:05,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:05,354 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:09:05,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:05,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1107918266, now seen corresponding path program 1 times [2023-11-19 05:09:05,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:09:05,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941430164] [2023-11-19 05:09:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:05,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:09:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:09:05,641 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:09:05,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941430164] [2023-11-19 05:09:05,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941430164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:09:05,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157600601] [2023-11-19 05:09:05,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:05,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:05,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:09:05,649 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:09:05,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 05:09:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:05,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:09:05,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-11-19 05:09:06,008 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:09:06,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157600601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:06,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:09:06,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:09:06,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489802556] [2023-11-19 05:09:06,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:06,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:09:06,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:09:06,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:09:06,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:09:06,011 INFO L87 Difference]: Start difference. First operand 3221 states and 5619 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:09:06,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:06,698 INFO L93 Difference]: Finished difference Result 6346 states and 10384 transitions. [2023-11-19 05:09:06,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:09:06,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2023-11-19 05:09:06,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:06,731 INFO L225 Difference]: With dead ends: 6346 [2023-11-19 05:09:06,732 INFO L226 Difference]: Without dead ends: 4771 [2023-11-19 05:09:06,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 05:09:06,744 INFO L413 NwaCegarLoop]: 3351 mSDtfsCounter, 3557 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3557 SdHoareTripleChecker+Valid, 3605 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:06,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3557 Valid, 3605 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:09:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4771 states. [2023-11-19 05:09:06,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4771 to 4761. [2023-11-19 05:09:06,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4761 states, 4315 states have (on average 1.6683661645422942) internal successors, (7199), 4325 states have internal predecessors, (7199), 348 states have call successors, (348), 96 states have call predecessors, (348), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2023-11-19 05:09:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4761 states to 4761 states and 7895 transitions. [2023-11-19 05:09:07,007 INFO L78 Accepts]: Start accepts. Automaton has 4761 states and 7895 transitions. Word has length 144 [2023-11-19 05:09:07,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:07,008 INFO L495 AbstractCegarLoop]: Abstraction has 4761 states and 7895 transitions. [2023-11-19 05:09:07,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:09:07,008 INFO L276 IsEmpty]: Start isEmpty. Operand 4761 states and 7895 transitions. [2023-11-19 05:09:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:09:07,021 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:07,022 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:09:07,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 05:09:07,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:07,236 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:09:07,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:07,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1202166532, now seen corresponding path program 1 times [2023-11-19 05:09:07,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:09:07,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666305498] [2023-11-19 05:09:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:07,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:09:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:09:07,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:09:07,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666305498] [2023-11-19 05:09:07,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666305498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:09:07,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823972785] [2023-11-19 05:09:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:07,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:07,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:09:07,488 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:09:07,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 05:09:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:07,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:09:07,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-19 05:09:07,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:09:07,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823972785] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:07,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:09:07,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:09:07,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166085901] [2023-11-19 05:09:07,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:07,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:09:07,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:09:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:09:07,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:09:07,867 INFO L87 Difference]: Start difference. First operand 4761 states and 7895 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:09:08,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:08,681 INFO L93 Difference]: Finished difference Result 10942 states and 17284 transitions. [2023-11-19 05:09:08,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:09:08,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2023-11-19 05:09:08,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:08,737 INFO L225 Difference]: With dead ends: 10942 [2023-11-19 05:09:08,737 INFO L226 Difference]: Without dead ends: 7827 [2023-11-19 05:09:08,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 05:09:08,753 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3545 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3545 SdHoareTripleChecker+Valid, 3572 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:08,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3545 Valid, 3572 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:09:08,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7827 states. [2023-11-19 05:09:09,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7827 to 7809. [2023-11-19 05:09:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7809 states, 6939 states have (on average 1.5897103329009943) internal successors, (11031), 6957 states have internal predecessors, (11031), 676 states have call successors, (676), 192 states have call predecessors, (676), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2023-11-19 05:09:09,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7809 states to 7809 states and 12383 transitions. [2023-11-19 05:09:09,218 INFO L78 Accepts]: Start accepts. Automaton has 7809 states and 12383 transitions. Word has length 144 [2023-11-19 05:09:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:09,220 INFO L495 AbstractCegarLoop]: Abstraction has 7809 states and 12383 transitions. [2023-11-19 05:09:09,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:09:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 7809 states and 12383 transitions. [2023-11-19 05:09:09,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:09:09,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:09,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:09:09,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 05:09:09,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:09,456 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:09:09,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:09,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1503224002, now seen corresponding path program 1 times [2023-11-19 05:09:09,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:09:09,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928171241] [2023-11-19 05:09:09,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:09,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:09:09,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:09:09,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:09:09,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928171241] [2023-11-19 05:09:09,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928171241] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:09:09,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030419494] [2023-11-19 05:09:09,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:09,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:09,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:09:09,834 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:09:09,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:09:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:10,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:09:10,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-19 05:09:10,147 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:09:10,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030419494] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:10,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:09:10,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:09:10,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528494471] [2023-11-19 05:09:10,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:10,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:09:10,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:09:10,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:09:10,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:09:10,149 INFO L87 Difference]: Start difference. First operand 7809 states and 12383 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:09:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:11,032 INFO L93 Difference]: Finished difference Result 20038 states and 30884 transitions. [2023-11-19 05:09:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:09:11,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2023-11-19 05:09:11,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:11,107 INFO L225 Difference]: With dead ends: 20038 [2023-11-19 05:09:11,107 INFO L226 Difference]: Without dead ends: 13875 [2023-11-19 05:09:11,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 05:09:11,138 INFO L413 NwaCegarLoop]: 3365 mSDtfsCounter, 3560 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3560 SdHoareTripleChecker+Valid, 3619 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:11,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3560 Valid, 3619 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:09:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13875 states. [2023-11-19 05:09:11,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13875 to 13841. [2023-11-19 05:09:11,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13841 states, 12139 states have (on average 1.5321690419309664) internal successors, (18599), 12173 states have internal predecessors, (18599), 1316 states have call successors, (1316), 384 states have call predecessors, (1316), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2023-11-19 05:09:11,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13841 states to 13841 states and 21231 transitions. [2023-11-19 05:09:11,768 INFO L78 Accepts]: Start accepts. Automaton has 13841 states and 21231 transitions. Word has length 144 [2023-11-19 05:09:11,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:11,769 INFO L495 AbstractCegarLoop]: Abstraction has 13841 states and 21231 transitions. [2023-11-19 05:09:11,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:09:11,769 INFO L276 IsEmpty]: Start isEmpty. Operand 13841 states and 21231 transitions. [2023-11-19 05:09:11,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:09:11,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:11,800 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:09:11,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:09:12,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 05:09:12,020 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:09:12,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:12,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1316509884, now seen corresponding path program 1 times [2023-11-19 05:09:12,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:09:12,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013097041] [2023-11-19 05:09:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:12,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:09:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:09:12,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:09:12,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013097041] [2023-11-19 05:09:12,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013097041] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:09:12,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978986156] [2023-11-19 05:09:12,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:12,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:12,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:09:12,224 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:09:12,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 05:09:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:12,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:09:12,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 05:09:12,577 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:09:12,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978986156] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:12,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:09:12,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:09:12,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55228220] [2023-11-19 05:09:12,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:12,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:09:12,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:09:12,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:09:12,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:09:12,582 INFO L87 Difference]: Start difference. First operand 13841 states and 21231 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:09:14,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:14,005 INFO L93 Difference]: Finished difference Result 38038 states and 57684 transitions. [2023-11-19 05:09:14,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:09:14,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2023-11-19 05:09:14,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:14,127 INFO L225 Difference]: With dead ends: 38038 [2023-11-19 05:09:14,128 INFO L226 Difference]: Without dead ends: 25843 [2023-11-19 05:09:14,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 05:09:14,344 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3530 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3530 SdHoareTripleChecker+Valid, 3572 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:14,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3530 Valid, 3572 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:09:14,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25843 states. [2023-11-19 05:09:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25843 to 25777. [2023-11-19 05:09:15,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25777 states, 22443 states have (on average 1.494586285255982) internal successors, (33543), 22509 states have internal predecessors, (33543), 2564 states have call successors, (2564), 768 states have call predecessors, (2564), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2023-11-19 05:09:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25777 states to 25777 states and 38671 transitions. [2023-11-19 05:09:15,604 INFO L78 Accepts]: Start accepts. Automaton has 25777 states and 38671 transitions. Word has length 144 [2023-11-19 05:09:15,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:15,605 INFO L495 AbstractCegarLoop]: Abstraction has 25777 states and 38671 transitions. [2023-11-19 05:09:15,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:09:15,606 INFO L276 IsEmpty]: Start isEmpty. Operand 25777 states and 38671 transitions. [2023-11-19 05:09:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-11-19 05:09:15,669 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:15,669 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:09:15,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 05:09:15,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:15,890 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:09:15,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:15,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2052661946, now seen corresponding path program 1 times [2023-11-19 05:09:15,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:09:15,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090121344] [2023-11-19 05:09:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:15,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:09:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 05:09:16,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:09:16,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090121344] [2023-11-19 05:09:16,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090121344] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 05:09:16,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522203670] [2023-11-19 05:09:16,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:16,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:16,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:09:16,138 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:09:16,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d7977cc-2434-4b92-bd94-3b5bb21a1dca/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 05:09:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:16,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 05:09:16,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:16,493 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-19 05:09:16,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:09:16,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522203670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:16,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 05:09:16,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 05:09:16,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149576699] [2023-11-19 05:09:16,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:16,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:09:16,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:09:16,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:09:16,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:09:16,496 INFO L87 Difference]: Start difference. First operand 25777 states and 38671 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 05:09:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:18,860 INFO L93 Difference]: Finished difference Result 73654 states and 110484 transitions. [2023-11-19 05:09:18,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:09:18,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 144 [2023-11-19 05:09:18,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:19,270 INFO L225 Difference]: With dead ends: 73654 [2023-11-19 05:09:19,270 INFO L226 Difference]: Without dead ends: 49523 [2023-11-19 05:09:19,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 144 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 05:09:19,344 INFO L413 NwaCegarLoop]: 3318 mSDtfsCounter, 3533 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3533 SdHoareTripleChecker+Valid, 3572 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:19,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3533 Valid, 3572 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:09:19,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49523 states.