./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2 --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 6e28c81ffc5a1b93c1edca1581014bee1ba1c062c6df3b7a8a783721ae21bc12 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:23:43,558 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:23:43,648 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:23:43,655 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:23:43,656 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:23:43,690 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:23:43,692 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:23:43,693 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:23:43,693 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:23:43,695 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:23:43,697 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:23:43,697 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:23:43,697 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:23:43,698 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:23:43,698 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:23:43,698 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:23:43,699 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:23:43,699 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:23:43,699 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:23:43,699 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:23:43,704 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:23:43,704 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:23:43,705 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:23:43,705 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:23:43,706 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:23:43,706 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:23:43,707 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:23:43,707 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:23:43,707 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:23:43,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:23:43,708 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:23:43,708 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:23:43,709 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:23:43,709 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:23:43,709 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:23:43,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:23:43,710 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:23:43,710 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:23:43,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:23:43,711 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:23:43,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:23:43,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:23:43,712 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:23:43,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:23:43,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:23:43,712 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:23:43,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:23:43,713 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_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e28c81ffc5a1b93c1edca1581014bee1ba1c062c6df3b7a8a783721ae21bc12 [2024-11-02 11:23:43,980 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:23:44,014 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:23:44,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:23:44,019 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:23:44,019 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:23:44,021 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c Unable to find full path for "g++" [2024-11-02 11:23:46,289 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:23:46,994 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:23:46,995 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c [2024-11-02 11:23:47,047 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/data/ea6422017/ecaa8889be5a42c0b3203788294f8c10/FLAG19ba25e07 [2024-11-02 11:23:47,068 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/data/ea6422017/ecaa8889be5a42c0b3203788294f8c10 [2024-11-02 11:23:47,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:23:47,075 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:23:47,077 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:23:47,078 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:23:47,092 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:23:47,096 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:23:47" (1/1) ... [2024-11-02 11:23:47,098 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cb4c613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:47, skipping insertion in model container [2024-11-02 11:23:47,098 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:23:47" (1/1) ... [2024-11-02 11:23:47,360 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:23:49,966 WARN L251 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_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c[378560,378573] [2024-11-02 11:23:50,002 WARN L251 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_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c[383339,383352] [2024-11-02 11:23:50,182 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:23:50,195 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:23:51,418 WARN L251 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_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c[378560,378573] [2024-11-02 11:23:51,427 WARN L251 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_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c[383339,383352] [2024-11-02 11:23:51,438 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:23:51,513 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:23:51,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:51 WrapperNode [2024-11-02 11:23:51,514 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:23:51,514 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:23:51,515 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:23:51,515 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:23:51,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:51" (1/1) ... [2024-11-02 11:23:51,597 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:51" (1/1) ... [2024-11-02 11:23:52,009 INFO L138 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12633 [2024-11-02 11:23:52,010 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:23:52,010 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:23:52,011 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:23:52,011 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:23:52,021 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:51" (1/1) ... [2024-11-02 11:23:52,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:51" (1/1) ... [2024-11-02 11:23:52,167 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:51" (1/1) ... [2024-11-02 11:23:52,167 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:51" (1/1) ... [2024-11-02 11:23:52,287 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:51" (1/1) ... [2024-11-02 11:23:52,413 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:51" (1/1) ... [2024-11-02 11:23:52,441 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:51" (1/1) ... [2024-11-02 11:23:52,463 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:51" (1/1) ... [2024-11-02 11:23:52,517 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:23:52,519 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:23:52,519 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:23:52,519 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:23:52,520 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:51" (1/1) ... [2024-11-02 11:23:52,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:23:52,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:23:52,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:23:52,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:23:52,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:23:52,590 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-02 11:23:52,590 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-02 11:23:52,590 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-02 11:23:52,590 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-02 11:23:52,590 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 11:23:52,590 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 11:23:52,590 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-02 11:23:52,590 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-02 11:23:52,590 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-02 11:23:52,591 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-02 11:23:52,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:23:52,592 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-02 11:23:52,592 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-02 11:23:52,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:23:52,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:23:52,736 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:23:52,738 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:24:03,196 INFO L? ?]: Removed 1695 outVars from TransFormulas that were not future-live. [2024-11-02 11:24:03,196 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:24:06,024 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:24:06,025 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-02 11:24:06,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:24:06 BoogieIcfgContainer [2024-11-02 11:24:06,026 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:24:06,028 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:24:06,028 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:24:06,032 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:24:06,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:23:47" (1/3) ... [2024-11-02 11:24:06,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bec43a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:24:06, skipping insertion in model container [2024-11-02 11:24:06,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:23:51" (2/3) ... [2024-11-02 11:24:06,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34bec43a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:24:06, skipping insertion in model container [2024-11-02 11:24:06,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:24:06" (3/3) ... [2024-11-02 11:24:06,035 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.02.cil-1.c [2024-11-02 11:24:06,054 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:24:06,054 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 11:24:06,173 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:24:06,183 INFO L333 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, 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;@71286399, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:24:06,184 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 11:24:06,196 INFO L276 IsEmpty]: Start isEmpty. Operand has 1724 states, 1699 states have (on average 1.9752795762213067) internal successors, (3356), 1702 states have internal predecessors, (3356), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-02 11:24:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-02 11:24:06,207 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:06,207 INFO L215 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] [2024-11-02 11:24:06,208 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:24:06,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:06,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1281815250, now seen corresponding path program 1 times [2024-11-02 11:24:06,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:06,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526896809] [2024-11-02 11:24:06,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:06,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:24:06,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:06,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526896809] [2024-11-02 11:24:06,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526896809] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:06,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:06,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:24:06,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288157828] [2024-11-02 11:24:06,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:06,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:24:06,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:06,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:24:06,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:24:06,731 INFO L87 Difference]: Start difference. First operand has 1724 states, 1699 states have (on average 1.9752795762213067) internal successors, (3356), 1702 states have internal predecessors, (3356), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (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) [2024-11-02 11:24:07,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:07,762 INFO L93 Difference]: Finished difference Result 3512 states and 6876 transitions. [2024-11-02 11:24:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:24:07,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (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 37 [2024-11-02 11:24:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:07,799 INFO L225 Difference]: With dead ends: 3512 [2024-11-02 11:24:07,800 INFO L226 Difference]: Without dead ends: 1787 [2024-11-02 11:24:07,811 INFO L431 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 [2024-11-02 11:24:07,815 INFO L432 NwaCegarLoop]: 3217 mSDtfsCounter, 3455 mSDsluCounter, 3159 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3455 SdHoareTripleChecker+Valid, 6376 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:07,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3455 Valid, 6376 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 11:24:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2024-11-02 11:24:07,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1786. [2024-11-02 11:24:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1744 states have (on average 1.9529816513761469) internal successors, (3406), 1747 states have internal predecessors, (3406), 28 states have call successors, (28), 12 states have call predecessors, (28), 12 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-02 11:24:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 3462 transitions. [2024-11-02 11:24:07,977 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 3462 transitions. Word has length 37 [2024-11-02 11:24:07,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:07,977 INFO L471 AbstractCegarLoop]: Abstraction has 1786 states and 3462 transitions. [2024-11-02 11:24:07,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (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) [2024-11-02 11:24:07,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 3462 transitions. [2024-11-02 11:24:07,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-02 11:24:07,984 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:07,984 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:07,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:24:07,985 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:24:07,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:07,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1626811866, now seen corresponding path program 1 times [2024-11-02 11:24:07,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:07,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678921682] [2024-11-02 11:24:07,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:07,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 11:24:08,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:08,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678921682] [2024-11-02 11:24:08,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678921682] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:24:08,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622401776] [2024-11-02 11:24:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:08,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:08,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:24:08,190 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:24:08,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:24:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:08,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 11:24:08,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:24:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-02 11:24:08,428 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 11:24:08,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622401776] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:08,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 11:24:08,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 11:24:08,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441465033] [2024-11-02 11:24:08,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:08,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:24:08,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:08,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:24:08,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:24:08,436 INFO L87 Difference]: Start difference. First operand 1786 states and 3462 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (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) [2024-11-02 11:24:09,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:09,010 INFO L93 Difference]: Finished difference Result 2059 states and 3833 transitions. [2024-11-02 11:24:09,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:24:09,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (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 67 [2024-11-02 11:24:09,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:09,023 INFO L225 Difference]: With dead ends: 2059 [2024-11-02 11:24:09,024 INFO L226 Difference]: Without dead ends: 1919 [2024-11-02 11:24:09,026 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:24:09,027 INFO L432 NwaCegarLoop]: 3175 mSDtfsCounter, 3351 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3351 SdHoareTripleChecker+Valid, 3253 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:09,028 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3351 Valid, 3253 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-02 11:24:09,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2024-11-02 11:24:09,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1915. [2024-11-02 11:24:09,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1839 states have (on average 1.9189777052746058) internal successors, (3529), 1843 states have internal predecessors, (3529), 50 states have call successors, (50), 24 states have call predecessors, (50), 24 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-02 11:24:09,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 3629 transitions. [2024-11-02 11:24:09,102 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 3629 transitions. Word has length 67 [2024-11-02 11:24:09,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:09,103 INFO L471 AbstractCegarLoop]: Abstraction has 1915 states and 3629 transitions. [2024-11-02 11:24:09,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (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) [2024-11-02 11:24:09,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 3629 transitions. [2024-11-02 11:24:09,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-02 11:24:09,107 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:09,107 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:09,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 11:24:09,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c6309396-b7b6-4f0e-b35f-bdec4fe1ff86/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:24:09,318 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:24:09,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:09,319 INFO L85 PathProgramCache]: Analyzing trace with hash 676455738, now seen corresponding path program 1 times [2024-11-02 11:24:09,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:09,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653667212] [2024-11-02 11:24:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:09,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-02 11:24:09,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:09,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653667212] [2024-11-02 11:24:09,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653667212] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:09,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:09,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 11:24:09,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79094031] [2024-11-02 11:24:09,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:09,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 11:24:09,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:09,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 11:24:09,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:24:09,861 INFO L87 Difference]: Start difference. First operand 1915 states and 3629 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-02 11:24:10,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:10,907 INFO L93 Difference]: Finished difference Result 2461 states and 4343 transitions. [2024-11-02 11:24:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 11:24:10,908 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 67 [2024-11-02 11:24:10,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:10,921 INFO L225 Difference]: With dead ends: 2461 [2024-11-02 11:24:10,921 INFO L226 Difference]: Without dead ends: 2193 [2024-11-02 11:24:10,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-11-02 11:24:10,925 INFO L432 NwaCegarLoop]: 3144 mSDtfsCounter, 3500 mSDsluCounter, 6244 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3511 SdHoareTripleChecker+Valid, 9388 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:10,925 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3511 Valid, 9388 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-02 11:24:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2024-11-02 11:24:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 2157. [2024-11-02 11:24:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2015 states have (on average 1.8615384615384616) internal successors, (3751), 2021 states have internal predecessors, (3751), 92 states have call successors, (92), 48 states have call predecessors, (92), 48 states have return successors, (92), 88 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-02 11:24:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 3935 transitions. [2024-11-02 11:24:11,212 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 3935 transitions. Word has length 67 [2024-11-02 11:24:11,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:11,213 INFO L471 AbstractCegarLoop]: Abstraction has 2157 states and 3935 transitions. [2024-11-02 11:24:11,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-02 11:24:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 3935 transitions. [2024-11-02 11:24:11,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-02 11:24:11,220 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:11,220 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:11,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:24:11,220 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:24:11,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:11,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1000121855, now seen corresponding path program 1 times [2024-11-02 11:24:11,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:11,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105839202] [2024-11-02 11:24:11,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:11,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:24:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:24:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-02 11:24:11,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:24:11,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105839202] [2024-11-02 11:24:11,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105839202] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:24:11,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:24:11,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 11:24:11,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4765003] [2024-11-02 11:24:11,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:24:11,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 11:24:11,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:24:11,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 11:24:11,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:24:11,535 INFO L87 Difference]: Start difference. First operand 2157 states and 3935 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-02 11:24:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:24:12,746 INFO L93 Difference]: Finished difference Result 2927 states and 4931 transitions. [2024-11-02 11:24:12,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-02 11:24:12,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 69 [2024-11-02 11:24:12,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:24:12,765 INFO L225 Difference]: With dead ends: 2927 [2024-11-02 11:24:12,765 INFO L226 Difference]: Without dead ends: 2417 [2024-11-02 11:24:12,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-11-02 11:24:12,769 INFO L432 NwaCegarLoop]: 3145 mSDtfsCounter, 3483 mSDsluCounter, 9351 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 12496 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-02 11:24:12,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 12496 Invalid, 1089 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [82 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-02 11:24:12,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2024-11-02 11:24:12,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2395. [2024-11-02 11:24:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2187 states have (on average 1.812071330589849) internal successors, (3963), 2195 states have internal predecessors, (3963), 134 states have call successors, (134), 72 states have call predecessors, (134), 72 states have return successors, (134), 128 states have call predecessors, (134), 134 states have call successors, (134) [2024-11-02 11:24:12,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 4231 transitions. [2024-11-02 11:24:12,903 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 4231 transitions. Word has length 69 [2024-11-02 11:24:12,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:24:12,905 INFO L471 AbstractCegarLoop]: Abstraction has 2395 states and 4231 transitions. [2024-11-02 11:24:12,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-02 11:24:12,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 4231 transitions. [2024-11-02 11:24:12,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-02 11:24:12,909 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:24:12,909 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 11:24:12,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 11:24:12,909 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:24:12,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:24:12,910 INFO L85 PathProgramCache]: Analyzing trace with hash 583902714, now seen corresponding path program 1 times [2024-11-02 11:24:12,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:24:12,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904993339] [2024-11-02 11:24:12,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:24:12,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms