./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX --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 ea2a15ada4a316287b701d4046ee75147e37e2af1b0a94d8406d231cafa83990 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:49:54,242 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:49:54,365 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 00:49:54,373 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:49:54,373 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:49:54,411 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:49:54,411 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:49:54,412 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:49:54,413 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:49:54,418 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:49:54,419 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:49:54,419 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:49:54,420 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:49:54,422 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:49:54,422 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:49:54,423 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:49:54,423 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:49:54,424 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:49:54,424 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:49:54,425 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:49:54,425 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:49:54,426 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:49:54,427 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:49:54,428 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:49:54,428 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 00:49:54,429 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:49:54,429 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 00:49:54,430 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:49:54,430 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:49:54,431 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:49:54,432 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:49:54,433 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 00:49:54,433 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:49:54,433 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:49:54,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:49:54,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:49:54,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:49:54,434 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:49:54,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:49:54,435 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:49:54,435 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:49:54,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:49:54,436 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:49:54,436 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:49:54,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:49:54,437 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_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ea2a15ada4a316287b701d4046ee75147e37e2af1b0a94d8406d231cafa83990 [2023-11-12 00:49:54,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:49:54,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:49:54,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:49:54,839 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:49:54,839 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:49:54,842 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c [2023-11-12 00:49:58,008 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:49:58,837 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:49:58,837 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c [2023-11-12 00:49:58,901 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/data/8791bec8a/6e85297da07043c495b5cbcf1927bafd/FLAG91f625ba3 [2023-11-12 00:49:58,923 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/data/8791bec8a/6e85297da07043c495b5cbcf1927bafd [2023-11-12 00:49:58,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:49:58,927 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:49:58,929 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:49:58,929 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:49:58,937 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:49:58,937 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:49:58" (1/1) ... [2023-11-12 00:49:58,939 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3836ab57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:49:58, skipping insertion in model container [2023-11-12 00:49:58,939 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:49:58" (1/1) ... [2023-11-12 00:49:59,284 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:50:01,603 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_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[380323,380336] [2023-11-12 00:50:01,635 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[383339,383352] [2023-11-12 00:50:01,900 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:50:01,913 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:50:03,339 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_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[380323,380336] [2023-11-12 00:50:03,346 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_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/sv-benchmarks/c/combinations/Problem05_label45+token_ring.07.cil-2.c[383339,383352] [2023-11-12 00:50:03,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:50:03,460 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:50:03,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:03 WrapperNode [2023-11-12 00:50:03,461 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:50:03,463 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:50:03,463 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:50:03,463 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:50:03,471 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:03" (1/1) ... [2023-11-12 00:50:03,628 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:03" (1/1) ... [2023-11-12 00:50:04,097 INFO L138 Inliner]: procedures = 58, calls = 63, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 12934 [2023-11-12 00:50:04,097 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:50:04,098 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:50:04,098 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:50:04,098 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:50:04,110 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:03" (1/1) ... [2023-11-12 00:50:04,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:03" (1/1) ... [2023-11-12 00:50:04,258 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:03" (1/1) ... [2023-11-12 00:50:04,258 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:03" (1/1) ... [2023-11-12 00:50:04,634 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:03" (1/1) ... [2023-11-12 00:50:04,692 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:03" (1/1) ... [2023-11-12 00:50:04,715 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:03" (1/1) ... [2023-11-12 00:50:04,744 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:03" (1/1) ... [2023-11-12 00:50:04,814 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:50:04,816 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:50:04,816 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:50:04,816 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:50:04,817 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:03" (1/1) ... [2023-11-12 00:50:04,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:50:04,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:04,855 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:50:04,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:50:04,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:50:04,907 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-12 00:50:04,907 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-12 00:50:04,908 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-12 00:50:04,909 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-12 00:50:04,909 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-12 00:50:04,910 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-12 00:50:04,910 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-11-12 00:50:04,910 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-11-12 00:50:04,910 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-12 00:50:04,910 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-12 00:50:04,911 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-12 00:50:04,911 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-12 00:50:04,911 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-12 00:50:04,911 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-12 00:50:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:50:04,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:50:04,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:50:05,046 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:50:05,048 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:50:15,104 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:50:17,908 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:50:17,909 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-12 00:50:17,914 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:50:17 BoogieIcfgContainer [2023-11-12 00:50:17,914 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:50:17,917 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:50:17,917 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:50:17,920 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:50:17,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:49:58" (1/3) ... [2023-11-12 00:50:17,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df75676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:50:17, skipping insertion in model container [2023-11-12 00:50:17,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:50:03" (2/3) ... [2023-11-12 00:50:17,922 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@df75676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:50:17, skipping insertion in model container [2023-11-12 00:50:17,922 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:50:17" (3/3) ... [2023-11-12 00:50:17,924 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.07.cil-2.c [2023-11-12 00:50:17,947 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:50:17,947 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-12 00:50:18,057 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:50:18,065 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;@5ed946f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:50:18,066 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-12 00:50:18,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 1790 states, 1757 states have (on average 1.9618668184405237) internal successors, (3447), 1762 states have internal predecessors, (3447), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-11-12 00:50:18,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-12 00:50:18,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:18,093 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] [2023-11-12 00:50:18,094 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:18,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:18,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1204694841, now seen corresponding path program 1 times [2023-11-12 00:50:18,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:18,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627510698] [2023-11-12 00:50:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:18,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:50:18,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:18,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627510698] [2023-11-12 00:50:18,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627510698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:18,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:18,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:50:18,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510378746] [2023-11-12 00:50:18,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:18,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:50:18,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:50:18,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:50:18,863 INFO L87 Difference]: Start difference. First operand has 1790 states, 1757 states have (on average 1.9618668184405237) internal successors, (3447), 1762 states have internal predecessors, (3447), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:50:20,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:20,140 INFO L93 Difference]: Finished difference Result 3703 states and 7191 transitions. [2023-11-12 00:50:20,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:50:20,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 53 [2023-11-12 00:50:20,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:20,174 INFO L225 Difference]: With dead ends: 3703 [2023-11-12 00:50:20,174 INFO L226 Difference]: Without dead ends: 1912 [2023-11-12 00:50:20,187 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 [2023-11-12 00:50:20,192 INFO L413 NwaCegarLoop]: 3384 mSDtfsCounter, 3638 mSDsluCounter, 3304 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3638 SdHoareTripleChecker+Valid, 6688 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:20,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3638 Valid, 6688 Invalid, 664 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-12 00:50:20,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2023-11-12 00:50:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1911. [2023-11-12 00:50:20,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1857 states have (on average 1.9289176090468498) internal successors, (3582), 1861 states have internal predecessors, (3582), 40 states have call successors, (40), 13 states have call predecessors, (40), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-12 00:50:20,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 3660 transitions. [2023-11-12 00:50:20,381 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 3660 transitions. Word has length 53 [2023-11-12 00:50:20,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:20,382 INFO L495 AbstractCegarLoop]: Abstraction has 1911 states and 3660 transitions. [2023-11-12 00:50:20,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-12 00:50:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 3660 transitions. [2023-11-12 00:50:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-12 00:50:20,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:20,393 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:20,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:50:20,394 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:20,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:20,395 INFO L85 PathProgramCache]: Analyzing trace with hash 726009248, now seen corresponding path program 1 times [2023-11-12 00:50:20,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:20,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066504106] [2023-11-12 00:50:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:20,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:50:20,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:20,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066504106] [2023-11-12 00:50:20,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066504106] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:20,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893968520] [2023-11-12 00:50:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:20,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:20,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:20,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:20,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:50:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:21,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:50:21,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-12 00:50:21,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:21,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893968520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:21,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:21,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:50:21,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679217744] [2023-11-12 00:50:21,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:21,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:21,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:21,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:21,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:21,258 INFO L87 Difference]: Start difference. First operand 1911 states and 3660 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:50:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:21,853 INFO L93 Difference]: Finished difference Result 2434 states and 4437 transitions. [2023-11-12 00:50:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:21,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 103 [2023-11-12 00:50:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:21,880 INFO L225 Difference]: With dead ends: 2434 [2023-11-12 00:50:21,880 INFO L226 Difference]: Without dead ends: 2169 [2023-11-12 00:50:21,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:21,885 INFO L413 NwaCegarLoop]: 3279 mSDtfsCounter, 3445 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:21,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3445 Valid, 3444 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:50:21,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2023-11-12 00:50:21,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 2163. [2023-11-12 00:50:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2065 states have (on average 1.8794188861985472) internal successors, (3881), 2070 states have internal predecessors, (3881), 72 states have call successors, (72), 25 states have call predecessors, (72), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-12 00:50:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 4023 transitions. [2023-11-12 00:50:21,997 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 4023 transitions. Word has length 103 [2023-11-12 00:50:21,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:21,997 INFO L495 AbstractCegarLoop]: Abstraction has 2163 states and 4023 transitions. [2023-11-12 00:50:21,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:50:21,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 4023 transitions. [2023-11-12 00:50:22,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-12 00:50:22,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:22,009 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:22,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:22,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:22,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:22,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:22,217 INFO L85 PathProgramCache]: Analyzing trace with hash -64855454, now seen corresponding path program 1 times [2023-11-12 00:50:22,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:22,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669026260] [2023-11-12 00:50:22,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:22,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:50:22,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:22,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669026260] [2023-11-12 00:50:22,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669026260] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:22,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278781023] [2023-11-12 00:50:22,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:22,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:22,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:22,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:22,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:50:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:22,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:50:22,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-12 00:50:22,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:22,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278781023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:22,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:22,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:50:22,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307202600] [2023-11-12 00:50:22,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:22,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:22,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:22,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:22,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:22,722 INFO L87 Difference]: Start difference. First operand 2163 states and 4023 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:50:23,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:23,296 INFO L93 Difference]: Finished difference Result 3184 states and 5534 transitions. [2023-11-12 00:50:23,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:23,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 103 [2023-11-12 00:50:23,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:23,317 INFO L225 Difference]: With dead ends: 3184 [2023-11-12 00:50:23,318 INFO L226 Difference]: Without dead ends: 2667 [2023-11-12 00:50:23,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:23,324 INFO L413 NwaCegarLoop]: 3259 mSDtfsCounter, 3451 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3424 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:23,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3424 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:50:23,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2023-11-12 00:50:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2659. [2023-11-12 00:50:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2659 states, 2475 states have (on average 1.804848484848485) internal successors, (4467), 2482 states have internal predecessors, (4467), 134 states have call successors, (134), 49 states have call predecessors, (134), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-12 00:50:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2659 states to 2659 states and 4733 transitions. [2023-11-12 00:50:23,442 INFO L78 Accepts]: Start accepts. Automaton has 2659 states and 4733 transitions. Word has length 103 [2023-11-12 00:50:23,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:23,444 INFO L495 AbstractCegarLoop]: Abstraction has 2659 states and 4733 transitions. [2023-11-12 00:50:23,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:50:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2659 states and 4733 transitions. [2023-11-12 00:50:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-12 00:50:23,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:23,452 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:23,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:23,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:23,660 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:23,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:23,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1950177884, now seen corresponding path program 1 times [2023-11-12 00:50:23,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:23,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167571784] [2023-11-12 00:50:23,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:23,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:50:23,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:23,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167571784] [2023-11-12 00:50:23,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167571784] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:23,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114265686] [2023-11-12 00:50:23,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:23,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:23,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:23,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:23,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:50:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:24,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:50:24,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:24,107 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-12 00:50:24,107 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:24,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114265686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:24,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:24,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:50:24,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814927781] [2023-11-12 00:50:24,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:24,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:24,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:24,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:24,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:24,110 INFO L87 Difference]: Start difference. First operand 2659 states and 4733 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:50:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:24,662 INFO L93 Difference]: Finished difference Result 4660 states and 7678 transitions. [2023-11-12 00:50:24,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:24,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 103 [2023-11-12 00:50:24,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:24,685 INFO L225 Difference]: With dead ends: 4660 [2023-11-12 00:50:24,686 INFO L226 Difference]: Without dead ends: 3647 [2023-11-12 00:50:24,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:24,692 INFO L413 NwaCegarLoop]: 3275 mSDtfsCounter, 3454 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3454 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:24,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3454 Valid, 3440 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:50:24,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2023-11-12 00:50:24,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 3635. [2023-11-12 00:50:24,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3635 states, 3283 states have (on average 1.7103259214133415) internal successors, (5615), 3294 states have internal predecessors, (5615), 254 states have call successors, (254), 97 states have call predecessors, (254), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2023-11-12 00:50:24,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3635 states to 3635 states and 6121 transitions. [2023-11-12 00:50:24,865 INFO L78 Accepts]: Start accepts. Automaton has 3635 states and 6121 transitions. Word has length 103 [2023-11-12 00:50:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:24,866 INFO L495 AbstractCegarLoop]: Abstraction has 3635 states and 6121 transitions. [2023-11-12 00:50:24,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:50:24,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3635 states and 6121 transitions. [2023-11-12 00:50:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-12 00:50:24,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:24,873 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:24,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:25,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:25,080 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:25,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:25,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1991607074, now seen corresponding path program 1 times [2023-11-12 00:50:25,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:25,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070583196] [2023-11-12 00:50:25,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:25,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-12 00:50:25,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:25,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070583196] [2023-11-12 00:50:25,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070583196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:25,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878563535] [2023-11-12 00:50:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:25,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:25,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:25,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:25,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:50:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:25,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:50:25,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-12 00:50:25,564 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:25,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878563535] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:25,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:25,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-12 00:50:25,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020871133] [2023-11-12 00:50:25,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:25,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:25,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:25,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:25,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:25,567 INFO L87 Difference]: Start difference. First operand 3635 states and 6121 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:50:26,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:26,258 INFO L93 Difference]: Finished difference Result 7564 states and 11866 transitions. [2023-11-12 00:50:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:26,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 103 [2023-11-12 00:50:26,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:26,302 INFO L225 Difference]: With dead ends: 7564 [2023-11-12 00:50:26,303 INFO L226 Difference]: Without dead ends: 5575 [2023-11-12 00:50:26,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 00:50:26,316 INFO L413 NwaCegarLoop]: 3229 mSDtfsCounter, 3439 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3439 SdHoareTripleChecker+Valid, 3394 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:26,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3439 Valid, 3394 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:50:26,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5575 states. [2023-11-12 00:50:26,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5575 to 5555. [2023-11-12 00:50:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5555 states, 4875 states have (on average 1.612923076923077) internal successors, (7863), 4894 states have internal predecessors, (7863), 486 states have call successors, (486), 193 states have call predecessors, (486), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-12 00:50:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5555 states to 5555 states and 8833 transitions. [2023-11-12 00:50:26,578 INFO L78 Accepts]: Start accepts. Automaton has 5555 states and 8833 transitions. Word has length 103 [2023-11-12 00:50:26,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:26,579 INFO L495 AbstractCegarLoop]: Abstraction has 5555 states and 8833 transitions. [2023-11-12 00:50:26,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 2 states have internal predecessors, (78), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-12 00:50:26,579 INFO L276 IsEmpty]: Start isEmpty. Operand 5555 states and 8833 transitions. [2023-11-12 00:50:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-12 00:50:26,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:26,589 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:26,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:50:26,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:26,798 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:26,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:26,798 INFO L85 PathProgramCache]: Analyzing trace with hash -935388828, now seen corresponding path program 1 times [2023-11-12 00:50:26,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:26,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430145028] [2023-11-12 00:50:26,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:26,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-12 00:50:27,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:27,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430145028] [2023-11-12 00:50:27,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430145028] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:27,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:27,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:50:27,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663295460] [2023-11-12 00:50:27,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:27,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:27,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:27,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:27,087 INFO L87 Difference]: Start difference. First operand 5555 states and 8833 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:50:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:27,945 INFO L93 Difference]: Finished difference Result 8663 states and 13380 transitions. [2023-11-12 00:50:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:27,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 103 [2023-11-12 00:50:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:27,996 INFO L225 Difference]: With dead ends: 8663 [2023-11-12 00:50:27,997 INFO L226 Difference]: Without dead ends: 6643 [2023-11-12 00:50:28,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:28,008 INFO L413 NwaCegarLoop]: 3323 mSDtfsCounter, 89 mSDsluCounter, 3237 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6560 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:28,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6560 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 00:50:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6643 states. [2023-11-12 00:50:28,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6643 to 6323. [2023-11-12 00:50:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 5611 states have (on average 1.6095170201390125) internal successors, (9031), 5630 states have internal predecessors, (9031), 502 states have call successors, (502), 209 states have call predecessors, (502), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2023-11-12 00:50:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 10033 transitions. [2023-11-12 00:50:28,397 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 10033 transitions. Word has length 103 [2023-11-12 00:50:28,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:28,398 INFO L495 AbstractCegarLoop]: Abstraction has 6323 states and 10033 transitions. [2023-11-12 00:50:28,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-12 00:50:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 10033 transitions. [2023-11-12 00:50:28,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-12 00:50:28,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:28,421 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:28,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:50:28,421 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:28,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:28,422 INFO L85 PathProgramCache]: Analyzing trace with hash -975130881, now seen corresponding path program 1 times [2023-11-12 00:50:28,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:28,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201449572] [2023-11-12 00:50:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:28,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-12 00:50:28,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:28,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201449572] [2023-11-12 00:50:28,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201449572] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:28,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:28,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:50:28,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676703050] [2023-11-12 00:50:28,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:28,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:28,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:28,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:28,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:28,578 INFO L87 Difference]: Start difference. First operand 6323 states and 10033 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:50:29,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:29,498 INFO L93 Difference]: Finished difference Result 15532 states and 23546 transitions. [2023-11-12 00:50:29,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:29,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2023-11-12 00:50:29,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:29,577 INFO L225 Difference]: With dead ends: 15532 [2023-11-12 00:50:29,577 INFO L226 Difference]: Without dead ends: 10855 [2023-11-12 00:50:29,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:29,598 INFO L413 NwaCegarLoop]: 3231 mSDtfsCounter, 3442 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3442 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:29,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3442 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 00:50:29,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2023-11-12 00:50:30,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 10803. [2023-11-12 00:50:30,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10803 states, 9419 states have (on average 1.5363626711965177) internal successors, (14471), 9454 states have internal predecessors, (14471), 966 states have call successors, (966), 417 states have call predecessors, (966), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2023-11-12 00:50:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10803 states to 10803 states and 16401 transitions. [2023-11-12 00:50:30,239 INFO L78 Accepts]: Start accepts. Automaton has 10803 states and 16401 transitions. Word has length 139 [2023-11-12 00:50:30,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:30,239 INFO L495 AbstractCegarLoop]: Abstraction has 10803 states and 16401 transitions. [2023-11-12 00:50:30,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:50:30,240 INFO L276 IsEmpty]: Start isEmpty. Operand 10803 states and 16401 transitions. [2023-11-12 00:50:30,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-12 00:50:30,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:30,283 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:30,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:50:30,283 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:30,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:30,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1215103804, now seen corresponding path program 1 times [2023-11-12 00:50:30,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:30,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771114831] [2023-11-12 00:50:30,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:30,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-12 00:50:30,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:30,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771114831] [2023-11-12 00:50:30,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771114831] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:30,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:30,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:50:30,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671552302] [2023-11-12 00:50:30,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:30,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:30,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:30,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:30,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:30,437 INFO L87 Difference]: Start difference. First operand 10803 states and 16401 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:50:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:31,875 INFO L93 Difference]: Finished difference Result 28828 states and 42618 transitions. [2023-11-12 00:50:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:31,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2023-11-12 00:50:31,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:31,945 INFO L225 Difference]: With dead ends: 28828 [2023-11-12 00:50:31,946 INFO L226 Difference]: Without dead ends: 19671 [2023-11-12 00:50:31,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:31,977 INFO L413 NwaCegarLoop]: 3231 mSDtfsCounter, 3444 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3444 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:31,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3444 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:50:32,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19671 states. [2023-11-12 00:50:32,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19671 to 19571. [2023-11-12 00:50:32,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19571 states, 16875 states have (on average 1.4833185185185185) internal successors, (25031), 16942 states have internal predecessors, (25031), 1862 states have call successors, (1862), 833 states have call predecessors, (1862), 832 states have return successors, (1860), 1796 states have call predecessors, (1860), 1860 states have call successors, (1860) [2023-11-12 00:50:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19571 states to 19571 states and 28753 transitions. [2023-11-12 00:50:33,064 INFO L78 Accepts]: Start accepts. Automaton has 19571 states and 28753 transitions. Word has length 139 [2023-11-12 00:50:33,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:33,065 INFO L495 AbstractCegarLoop]: Abstraction has 19571 states and 28753 transitions. [2023-11-12 00:50:33,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:50:33,066 INFO L276 IsEmpty]: Start isEmpty. Operand 19571 states and 28753 transitions. [2023-11-12 00:50:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-12 00:50:33,123 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:33,124 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:33,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:50:33,124 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:33,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:33,125 INFO L85 PathProgramCache]: Analyzing trace with hash -692698474, now seen corresponding path program 1 times [2023-11-12 00:50:33,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:33,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945877787] [2023-11-12 00:50:33,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:33,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:33,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-12 00:50:33,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:33,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945877787] [2023-11-12 00:50:33,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945877787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:33,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:50:33,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:50:33,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260635592] [2023-11-12 00:50:33,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:33,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:33,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:33,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:33,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:33,241 INFO L87 Difference]: Start difference. First operand 19571 states and 28753 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:50:34,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:50:34,859 INFO L93 Difference]: Finished difference Result 54844 states and 79578 transitions. [2023-11-12 00:50:34,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:50:34,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2023-11-12 00:50:34,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:50:35,021 INFO L225 Difference]: With dead ends: 54844 [2023-11-12 00:50:35,021 INFO L226 Difference]: Without dead ends: 36919 [2023-11-12 00:50:35,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:50:35,096 INFO L413 NwaCegarLoop]: 3256 mSDtfsCounter, 3447 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3447 SdHoareTripleChecker+Valid, 3421 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:50:35,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3447 Valid, 3421 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 00:50:35,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36919 states. [2023-11-12 00:50:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36919 to 36723. [2023-11-12 00:50:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36723 states, 31467 states have (on average 1.446308831474243) internal successors, (45511), 31598 states have internal predecessors, (45511), 3590 states have call successors, (3590), 1665 states have call predecessors, (3590), 1664 states have return successors, (3588), 3460 states have call predecessors, (3588), 3588 states have call successors, (3588) [2023-11-12 00:50:37,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36723 states to 36723 states and 52689 transitions. [2023-11-12 00:50:37,771 INFO L78 Accepts]: Start accepts. Automaton has 36723 states and 52689 transitions. Word has length 139 [2023-11-12 00:50:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:50:37,772 INFO L495 AbstractCegarLoop]: Abstraction has 36723 states and 52689 transitions. [2023-11-12 00:50:37,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-12 00:50:37,772 INFO L276 IsEmpty]: Start isEmpty. Operand 36723 states and 52689 transitions. [2023-11-12 00:50:37,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-11-12 00:50:37,904 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:50:37,904 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:50:37,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-12 00:50:37,906 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:50:37,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:50:37,907 INFO L85 PathProgramCache]: Analyzing trace with hash 724865962, now seen corresponding path program 1 times [2023-11-12 00:50:37,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:50:37,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877711735] [2023-11-12 00:50:37,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:37,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:50:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-12 00:50:38,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:50:38,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877711735] [2023-11-12 00:50:38,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877711735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:50:38,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470259113] [2023-11-12 00:50:38,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:50:38,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:50:38,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:50:38,369 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:50:38,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdbc2976-9b05-4033-8dc2-02c6f4c0f36c/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 00:50:38,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:50:38,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 903 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:50:38,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:50:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-12 00:50:38,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:50:38,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470259113] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:50:38,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:50:38,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-12 00:50:38,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931915624] [2023-11-12 00:50:38,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:50:38,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:50:38,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:50:38,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:50:38,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 00:50:38,780 INFO L87 Difference]: Start difference. First operand 36723 states and 52689 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)