./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91 --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 ef314c292717d2a6588e316ab1f60892c9568f1799857e58c021646ee7eb2cde --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 23:19:48,654 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 23:19:48,780 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-24 23:19:48,787 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 23:19:48,788 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 23:19:48,828 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 23:19:48,829 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 23:19:48,829 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 23:19:48,831 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 23:19:48,836 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 23:19:48,836 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-24 23:19:48,838 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-24 23:19:48,838 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-24 23:19:48,840 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-24 23:19:48,841 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-24 23:19:48,841 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-24 23:19:48,842 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-24 23:19:48,842 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-24 23:19:48,844 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-24 23:19:48,844 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-24 23:19:48,845 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-24 23:19:48,846 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-24 23:19:48,847 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 23:19:48,847 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 23:19:48,848 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 23:19:48,848 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 23:19:48,849 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 23:19:48,849 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 23:19:48,850 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 23:19:48,850 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 23:19:48,851 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 23:19:48,852 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 23:19:48,852 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 23:19:48,852 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 23:19:48,853 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 23:19:48,853 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 23:19:48,853 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 23:19:48,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:19:48,854 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 23:19:48,854 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 23:19:48,854 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 23:19:48,855 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-24 23:19:48,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 23:19:48,855 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 23:19:48,856 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 23:19:48,856 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-24 23:19:48,856 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 23:19:48,856 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_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef314c292717d2a6588e316ab1f60892c9568f1799857e58c021646ee7eb2cde [2023-11-24 23:19:49,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 23:19:49,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 23:19:49,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 23:19:49,134 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 23:19:49,134 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 23:19:49,135 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/../../sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c [2023-11-24 23:19:52,292 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 23:19:53,234 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 23:19:53,235 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c [2023-11-24 23:19:53,328 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/data/08c6739eb/906c2dd68faf48a88059cbbfbbc5edbe/FLAG477e0ef61 [2023-11-24 23:19:53,351 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/data/08c6739eb/906c2dd68faf48a88059cbbfbbc5edbe [2023-11-24 23:19:53,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 23:19:53,362 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 23:19:53,367 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 23:19:53,367 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 23:19:53,373 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 23:19:53,374 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:19:53" (1/1) ... [2023-11-24 23:19:53,376 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4273d2e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:53, skipping insertion in model container [2023-11-24 23:19:53,376 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 11:19:53" (1/1) ... [2023-11-24 23:19:53,733 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 23:19:56,591 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_91476882-8b82-4f3b-8b24-aa0587bda898/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[377069,377082] [2023-11-24 23:19:56,632 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_91476882-8b82-4f3b-8b24-aa0587bda898/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[383339,383352] [2023-11-24 23:19:56,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:19:56,943 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 23:19:58,433 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_91476882-8b82-4f3b-8b24-aa0587bda898/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[377069,377082] [2023-11-24 23:19:58,448 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_91476882-8b82-4f3b-8b24-aa0587bda898/sv-benchmarks/c/combinations/Problem05_label40+token_ring.07.cil-1.c[383339,383352] [2023-11-24 23:19:58,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 23:19:58,583 INFO L206 MainTranslator]: Completed translation [2023-11-24 23:19:58,584 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:58 WrapperNode [2023-11-24 23:19:58,584 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 23:19:58,587 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 23:19:58,587 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 23:19:58,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 23:19:58,598 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:58" (1/1) ... [2023-11-24 23:19:58,743 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:58" (1/1) ... [2023-11-24 23:19:59,338 INFO L138 Inliner]: procedures = 58, calls = 62, calls flagged for inlining = 36, calls inlined = 36, statements flattened = 12928 [2023-11-24 23:19:59,339 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 23:19:59,340 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 23:19:59,340 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 23:19:59,340 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 23:19:59,353 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:58" (1/1) ... [2023-11-24 23:19:59,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:58" (1/1) ... [2023-11-24 23:19:59,582 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:58" (1/1) ... [2023-11-24 23:19:59,582 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:58" (1/1) ... [2023-11-24 23:19:59,835 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:58" (1/1) ... [2023-11-24 23:19:59,899 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:58" (1/1) ... [2023-11-24 23:19:59,950 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:58" (1/1) ... [2023-11-24 23:19:59,983 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:58" (1/1) ... [2023-11-24 23:20:00,208 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 23:20:00,215 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 23:20:00,215 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 23:20:00,215 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 23:20:00,216 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:58" (1/1) ... [2023-11-24 23:20:00,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-24 23:20:00,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:00,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-24 23:20:00,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-24 23:20:00,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 23:20:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-24 23:20:00,326 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-24 23:20:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-24 23:20:00,327 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-24 23:20:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-24 23:20:00,327 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-24 23:20:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-24 23:20:00,328 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-24 23:20:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-24 23:20:00,328 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-24 23:20:00,328 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-24 23:20:00,328 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-24 23:20:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 23:20:00,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 23:20:00,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 23:20:00,484 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 23:20:00,488 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 23:20:12,505 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 23:20:16,971 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 23:20:16,971 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-24 23:20:16,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:20:16 BoogieIcfgContainer [2023-11-24 23:20:16,975 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 23:20:16,978 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 23:20:16,978 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 23:20:16,983 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 23:20:16,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 11:19:53" (1/3) ... [2023-11-24 23:20:16,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fed392c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:20:16, skipping insertion in model container [2023-11-24 23:20:16,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 11:19:58" (2/3) ... [2023-11-24 23:20:16,985 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fed392c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 11:20:16, skipping insertion in model container [2023-11-24 23:20:16,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 11:20:16" (3/3) ... [2023-11-24 23:20:16,987 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label40+token_ring.07.cil-1.c [2023-11-24 23:20:17,013 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 23:20:17,013 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 23:20:17,152 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 23:20:17,163 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;@716ea514, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 23:20:17,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-24 23:20:17,180 INFO L276 IsEmpty]: Start isEmpty. Operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-11-24 23:20:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-24 23:20:17,201 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:17,202 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] [2023-11-24 23:20:17,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:17,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:17,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1431366973, now seen corresponding path program 1 times [2023-11-24 23:20:17,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:17,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835562850] [2023-11-24 23:20:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:17,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 23:20:18,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:18,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835562850] [2023-11-24 23:20:18,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835562850] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:18,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:18,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 23:20:18,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464150873] [2023-11-24 23:20:18,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:18,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 23:20:18,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:18,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 23:20:18,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 23:20:18,065 INFO L87 Difference]: Start difference. First operand has 1784 states, 1754 states have (on average 1.9618015963511972) internal successors, (3441), 1757 states have internal predecessors, (3441), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) 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, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:20:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:19,634 INFO L93 Difference]: Finished difference Result 3692 states and 7171 transitions. [2023-11-24 23:20:19,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 23:20:19,637 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, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 52 [2023-11-24 23:20:19,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:19,676 INFO L225 Difference]: With dead ends: 3692 [2023-11-24 23:20:19,677 INFO L226 Difference]: Without dead ends: 1907 [2023-11-24 23:20:19,692 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 [2023-11-24 23:20:19,700 INFO L413 NwaCegarLoop]: 3377 mSDtfsCounter, 3630 mSDsluCounter, 3299 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3630 SdHoareTripleChecker+Valid, 6676 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:19,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3630 Valid, 6676 Invalid, 660 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-24 23:20:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2023-11-24 23:20:19,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1906. [2023-11-24 23:20:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1906 states, 1854 states have (on average 1.9288025889967637) internal successors, (3576), 1857 states have internal predecessors, (3576), 38 states have call successors, (38), 12 states have call predecessors, (38), 12 states have return successors, (38), 37 states have call predecessors, (38), 38 states have call successors, (38) [2023-11-24 23:20:19,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1906 states to 1906 states and 3652 transitions. [2023-11-24 23:20:19,928 INFO L78 Accepts]: Start accepts. Automaton has 1906 states and 3652 transitions. Word has length 52 [2023-11-24 23:20:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:19,928 INFO L495 AbstractCegarLoop]: Abstraction has 1906 states and 3652 transitions. [2023-11-24 23:20:19,929 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, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 23:20:19,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1906 states and 3652 transitions. [2023-11-24 23:20:19,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 23:20:19,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:19,949 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] [2023-11-24 23:20:19,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 23:20:19,950 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:19,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:19,952 INFO L85 PathProgramCache]: Analyzing trace with hash -648962537, now seen corresponding path program 1 times [2023-11-24 23:20:19,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:19,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533784840] [2023-11-24 23:20:19,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:19,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:20:20,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:20,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533784840] [2023-11-24 23:20:20,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533784840] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:20:20,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383339995] [2023-11-24 23:20:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:20,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:20,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:20,390 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:20:20,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 23:20:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:20,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:20:20,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:20:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-24 23:20:20,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:20:20,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383339995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:20,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:20:20,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:20:20,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309111836] [2023-11-24 23:20:20,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:20,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:20,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:20,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:20,817 INFO L87 Difference]: Start difference. First operand 1906 states and 3652 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:21,553 INFO L93 Difference]: Finished difference Result 2419 states and 4413 transitions. [2023-11-24 23:20:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:21,554 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-24 23:20:21,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:21,580 INFO L225 Difference]: With dead ends: 2419 [2023-11-24 23:20:21,581 INFO L226 Difference]: Without dead ends: 2159 [2023-11-24 23:20:21,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:21,587 INFO L413 NwaCegarLoop]: 3265 mSDtfsCounter, 3443 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3443 SdHoareTripleChecker+Valid, 3423 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:21,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3443 Valid, 3423 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:20:21,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2159 states. [2023-11-24 23:20:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2159 to 2155. [2023-11-24 23:20:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 2059 states have (on average 1.8790675084992714) internal successors, (3869), 2063 states have internal predecessors, (3869), 70 states have call successors, (70), 24 states have call predecessors, (70), 24 states have return successors, (70), 68 states have call predecessors, (70), 70 states have call successors, (70) [2023-11-24 23:20:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 4009 transitions. [2023-11-24 23:20:21,734 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 4009 transitions. Word has length 102 [2023-11-24 23:20:21,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:21,735 INFO L495 AbstractCegarLoop]: Abstraction has 2155 states and 4009 transitions. [2023-11-24 23:20:21,735 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:21,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 4009 transitions. [2023-11-24 23:20:21,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 23:20:21,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:21,743 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] [2023-11-24 23:20:21,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 23:20:21,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:21,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:21,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:21,953 INFO L85 PathProgramCache]: Analyzing trace with hash 2061167253, now seen corresponding path program 1 times [2023-11-24 23:20:21,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:21,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860100688] [2023-11-24 23:20:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:21,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:20:22,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:22,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860100688] [2023-11-24 23:20:22,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860100688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:20:22,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242755856] [2023-11-24 23:20:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:22,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:22,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:22,216 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:20:22,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 23:20:22,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:22,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:20:22,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:20:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 23:20:22,541 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:20:22,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242755856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:22,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:20:22,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:20:22,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348838253] [2023-11-24 23:20:22,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:22,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:22,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:22,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:22,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:22,545 INFO L87 Difference]: Start difference. First operand 2155 states and 4009 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:23,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:23,224 INFO L93 Difference]: Finished difference Result 3160 states and 5492 transitions. [2023-11-24 23:20:23,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:23,225 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-24 23:20:23,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:23,252 INFO L225 Difference]: With dead ends: 3160 [2023-11-24 23:20:23,252 INFO L226 Difference]: Without dead ends: 2651 [2023-11-24 23:20:23,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:23,258 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3437 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3437 SdHoareTripleChecker+Valid, 3380 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 [2023-11-24 23:20:23,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3437 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:20:23,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2651 states. [2023-11-24 23:20:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2651 to 2645. [2023-11-24 23:20:23,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2645 states, 2463 states have (on average 1.8038976857490865) internal successors, (4443), 2469 states have internal predecessors, (4443), 132 states have call successors, (132), 48 states have call predecessors, (132), 48 states have return successors, (132), 128 states have call predecessors, (132), 132 states have call successors, (132) [2023-11-24 23:20:23,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2645 states to 2645 states and 4707 transitions. [2023-11-24 23:20:23,394 INFO L78 Accepts]: Start accepts. Automaton has 2645 states and 4707 transitions. Word has length 102 [2023-11-24 23:20:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:23,395 INFO L495 AbstractCegarLoop]: Abstraction has 2645 states and 4707 transitions. [2023-11-24 23:20:23,395 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:23,395 INFO L276 IsEmpty]: Start isEmpty. Operand 2645 states and 4707 transitions. [2023-11-24 23:20:23,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 23:20:23,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:23,402 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] [2023-11-24 23:20:23,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 23:20:23,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:23,610 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:23,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash 511634835, now seen corresponding path program 1 times [2023-11-24 23:20:23,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:23,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330072379] [2023-11-24 23:20:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:23,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:20:23,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:23,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330072379] [2023-11-24 23:20:23,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330072379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:20:23,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122784286] [2023-11-24 23:20:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:23,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:23,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:23,837 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:20:23,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 23:20:24,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:24,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:20:24,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:20:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-24 23:20:24,137 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:20:24,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122784286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:24,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:20:24,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:20:24,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445189565] [2023-11-24 23:20:24,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:24,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:24,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:24,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:24,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:24,141 INFO L87 Difference]: Start difference. First operand 2645 states and 4707 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:24,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:24,865 INFO L93 Difference]: Finished difference Result 4618 states and 7600 transitions. [2023-11-24 23:20:24,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:24,870 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-24 23:20:24,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:24,904 INFO L225 Difference]: With dead ends: 4618 [2023-11-24 23:20:24,905 INFO L226 Difference]: Without dead ends: 3619 [2023-11-24 23:20:24,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:24,920 INFO L413 NwaCegarLoop]: 3261 mSDtfsCounter, 3446 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3446 SdHoareTripleChecker+Valid, 3419 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:24,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3446 Valid, 3419 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:20:24,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2023-11-24 23:20:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3609. [2023-11-24 23:20:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 3259 states have (on average 1.708192697146364) internal successors, (5567), 3269 states have internal predecessors, (5567), 252 states have call successors, (252), 96 states have call predecessors, (252), 96 states have return successors, (252), 244 states have call predecessors, (252), 252 states have call successors, (252) [2023-11-24 23:20:25,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 6071 transitions. [2023-11-24 23:20:25,149 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 6071 transitions. Word has length 102 [2023-11-24 23:20:25,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:25,153 INFO L495 AbstractCegarLoop]: Abstraction has 3609 states and 6071 transitions. [2023-11-24 23:20:25,153 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:25,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 6071 transitions. [2023-11-24 23:20:25,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 23:20:25,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:25,163 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] [2023-11-24 23:20:25,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 23:20:25,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:25,372 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:25,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:25,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1192978517, now seen corresponding path program 1 times [2023-11-24 23:20:25,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:25,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393503660] [2023-11-24 23:20:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:25,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 23:20:25,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:25,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393503660] [2023-11-24 23:20:25,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393503660] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 23:20:25,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010597279] [2023-11-24 23:20:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:25,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:25,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 [2023-11-24 23:20:25,601 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 23:20:25,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 23:20:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:26,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 23:20:26,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 23:20:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 23:20:26,209 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 23:20:26,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010597279] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:26,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 23:20:26,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-24 23:20:26,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305518703] [2023-11-24 23:20:26,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:26,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:26,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:26,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:26,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:26,222 INFO L87 Difference]: Start difference. First operand 3609 states and 6071 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:27,139 INFO L93 Difference]: Finished difference Result 7486 states and 11716 transitions. [2023-11-24 23:20:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:27,140 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 102 [2023-11-24 23:20:27,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:27,195 INFO L225 Difference]: With dead ends: 7486 [2023-11-24 23:20:27,195 INFO L226 Difference]: Without dead ends: 5523 [2023-11-24 23:20:27,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 23:20:27,209 INFO L413 NwaCegarLoop]: 3222 mSDtfsCounter, 3431 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3431 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:27,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3431 Valid, 3380 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 23:20:27,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5523 states. [2023-11-24 23:20:27,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5523 to 5505. [2023-11-24 23:20:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 4827 states have (on average 1.6090739589807335) internal successors, (7767), 4845 states have internal predecessors, (7767), 484 states have call successors, (484), 192 states have call predecessors, (484), 192 states have return successors, (484), 468 states have call predecessors, (484), 484 states have call successors, (484) [2023-11-24 23:20:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 8735 transitions. [2023-11-24 23:20:27,726 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 8735 transitions. Word has length 102 [2023-11-24 23:20:27,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:27,726 INFO L495 AbstractCegarLoop]: Abstraction has 5505 states and 8735 transitions. [2023-11-24 23:20:27,727 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-24 23:20:27,727 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 8735 transitions. [2023-11-24 23:20:27,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-24 23:20:27,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:27,738 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] [2023-11-24 23:20:27,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 23:20:27,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91476882-8b82-4f3b-8b24-aa0587bda898/bin/utaipan-verify-SwPr7d2a91/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 23:20:27,946 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:27,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:27,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1791295955, now seen corresponding path program 1 times [2023-11-24 23:20:27,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:27,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941253500] [2023-11-24 23:20:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:27,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-24 23:20:28,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:28,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941253500] [2023-11-24 23:20:28,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941253500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:28,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:28,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:28,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841515788] [2023-11-24 23:20:28,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:28,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:28,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:28,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:28,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:28,098 INFO L87 Difference]: Start difference. First operand 5505 states and 8735 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 23:20:29,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:29,069 INFO L93 Difference]: Finished difference Result 8563 states and 13184 transitions. [2023-11-24 23:20:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:29,070 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), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 102 [2023-11-24 23:20:29,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:29,143 INFO L225 Difference]: With dead ends: 8563 [2023-11-24 23:20:29,143 INFO L226 Difference]: Without dead ends: 6593 [2023-11-24 23:20:29,151 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 [2023-11-24 23:20:29,155 INFO L413 NwaCegarLoop]: 3316 mSDtfsCounter, 89 mSDsluCounter, 3230 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 6546 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:29,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 6546 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 23:20:29,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6593 states. [2023-11-24 23:20:29,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6593 to 6273. [2023-11-24 23:20:29,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6273 states, 5563 states have (on average 1.6061477619989215) internal successors, (8935), 5581 states have internal predecessors, (8935), 500 states have call successors, (500), 208 states have call predecessors, (500), 208 states have return successors, (500), 484 states have call predecessors, (500), 500 states have call successors, (500) [2023-11-24 23:20:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6273 states to 6273 states and 9935 transitions. [2023-11-24 23:20:29,477 INFO L78 Accepts]: Start accepts. Automaton has 6273 states and 9935 transitions. Word has length 102 [2023-11-24 23:20:29,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:29,478 INFO L495 AbstractCegarLoop]: Abstraction has 6273 states and 9935 transitions. [2023-11-24 23:20:29,479 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), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 23:20:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 6273 states and 9935 transitions. [2023-11-24 23:20:29,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-24 23:20:29,502 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:29,503 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] [2023-11-24 23:20:29,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 23:20:29,503 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:29,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:29,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1032749465, now seen corresponding path program 1 times [2023-11-24 23:20:29,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:29,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457142845] [2023-11-24 23:20:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:29,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-24 23:20:29,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:29,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457142845] [2023-11-24 23:20:29,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457142845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:29,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:29,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:29,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961555237] [2023-11-24 23:20:29,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:29,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:29,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:29,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:29,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:29,649 INFO L87 Difference]: Start difference. First operand 6273 states and 9935 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-24 23:20:30,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 23:20:30,622 INFO L93 Difference]: Finished difference Result 15382 states and 23252 transitions. [2023-11-24 23:20:30,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 23:20:30,622 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 138 [2023-11-24 23:20:30,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 23:20:30,674 INFO L225 Difference]: With dead ends: 15382 [2023-11-24 23:20:30,674 INFO L226 Difference]: Without dead ends: 10755 [2023-11-24 23:20:30,691 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 [2023-11-24 23:20:30,692 INFO L413 NwaCegarLoop]: 3224 mSDtfsCounter, 3434 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3434 SdHoareTripleChecker+Valid, 3382 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 23:20:30,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3434 Valid, 3382 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 23:20:30,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10755 states. [2023-11-24 23:20:31,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10755 to 10705. [2023-11-24 23:20:31,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10705 states, 9323 states have (on average 1.5315885444599378) internal successors, (14279), 9357 states have internal predecessors, (14279), 964 states have call successors, (964), 416 states have call predecessors, (964), 416 states have return successors, (964), 932 states have call predecessors, (964), 964 states have call successors, (964) [2023-11-24 23:20:31,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10705 states to 10705 states and 16207 transitions. [2023-11-24 23:20:31,408 INFO L78 Accepts]: Start accepts. Automaton has 10705 states and 16207 transitions. Word has length 138 [2023-11-24 23:20:31,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 23:20:31,409 INFO L495 AbstractCegarLoop]: Abstraction has 10705 states and 16207 transitions. [2023-11-24 23:20:31,409 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-24 23:20:31,409 INFO L276 IsEmpty]: Start isEmpty. Operand 10705 states and 16207 transitions. [2023-11-24 23:20:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-24 23:20:31,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 23:20:31,445 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] [2023-11-24 23:20:31,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 23:20:31,447 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 23:20:31,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 23:20:31,449 INFO L85 PathProgramCache]: Analyzing trace with hash 237872081, now seen corresponding path program 1 times [2023-11-24 23:20:31,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-24 23:20:31,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134505764] [2023-11-24 23:20:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 23:20:31,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 23:20:31,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 23:20:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-11-24 23:20:31,624 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-24 23:20:31,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134505764] [2023-11-24 23:20:31,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134505764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 23:20:31,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 23:20:31,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 23:20:31,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441057761] [2023-11-24 23:20:31,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 23:20:31,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 23:20:31,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-24 23:20:31,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 23:20:31,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 23:20:31,628 INFO L87 Difference]: Start difference. First operand 10705 states and 16207 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)