./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E --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 9f6b3df944a21b7c8707e83029bbb1a58d3af14f3c6a747de4c932a385afddd0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:41:41,283 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:41:41,386 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 05:41:41,394 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:41:41,397 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:41:41,435 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:41:41,436 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:41:41,437 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:41:41,438 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:41:41,438 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:41:41,438 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:41:41,438 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:41:41,438 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:41:41,439 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:41:41,439 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:41:41,439 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:41:41,441 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:41:41,441 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:41:41,441 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:41:41,441 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:41:41,441 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:41:41,441 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:41:41,442 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:41:41,442 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:41:41,442 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:41:41,442 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:41:41,442 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:41:41,442 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:41:41,442 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:41:41,442 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:41:41,442 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:41:41,442 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:41:41,443 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:41:41,443 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:41:41,443 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:41:41,443 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:41:41,443 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:41:41,443 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:41:41,443 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:41:41,443 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:41:41,443 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:41:41,443 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:41:41,443 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:41:41,443 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:41:41,444 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:41:41,444 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:41:41,444 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:41:41,444 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E 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 -> 9f6b3df944a21b7c8707e83029bbb1a58d3af14f3c6a747de4c932a385afddd0 [2024-11-14 05:41:41,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:41:41,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:41:41,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:41:41,782 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:41:41,784 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:41:41,785 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.15.cil.c Unable to find full path for "g++" [2024-11-14 05:41:43,810 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:41:44,583 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:41:44,585 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/sv-benchmarks/c/combinations/Problem05_label45+token_ring.15.cil.c [2024-11-14 05:41:44,642 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/data/25b3cca2d/6464bc791ae442918b12867616dc1c0e/FLAG7af1bb16c [2024-11-14 05:41:44,665 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/data/25b3cca2d/6464bc791ae442918b12867616dc1c0e [2024-11-14 05:41:44,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:41:44,670 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:41:44,672 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:41:44,673 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:41:44,678 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:41:44,680 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:41:44" (1/1) ... [2024-11-14 05:41:44,680 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a38847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:41:44, skipping insertion in model container [2024-11-14 05:41:44,681 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:41:44" (1/1) ... [2024-11-14 05:41:44,889 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:41:46,737 WARN L250 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_7362701e-9de3-4a2f-9733-70f6a67f6141/sv-benchmarks/c/combinations/Problem05_label45+token_ring.15.cil.c[380323,380336] [2024-11-14 05:41:46,772 WARN L250 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_7362701e-9de3-4a2f-9733-70f6a67f6141/sv-benchmarks/c/combinations/Problem05_label45+token_ring.15.cil.c[383339,383352] [2024-11-14 05:41:47,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:41:47,205 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:41:48,341 WARN L250 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_7362701e-9de3-4a2f-9733-70f6a67f6141/sv-benchmarks/c/combinations/Problem05_label45+token_ring.15.cil.c[380323,380336] [2024-11-14 05:41:48,346 WARN L250 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_7362701e-9de3-4a2f-9733-70f6a67f6141/sv-benchmarks/c/combinations/Problem05_label45+token_ring.15.cil.c[383339,383352] [2024-11-14 05:41:48,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:41:48,514 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:41:48,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:41:48 WrapperNode [2024-11-14 05:41:48,515 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:41:48,516 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:41:48,516 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:41:48,516 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:41:48,523 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:41:48" (1/1) ... [2024-11-14 05:41:48,608 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:41:48" (1/1) ... [2024-11-14 05:41:48,936 INFO L138 Inliner]: procedures = 70, calls = 81, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 13280 [2024-11-14 05:41:48,936 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:41:48,937 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:41:48,937 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:41:48,937 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:41:48,944 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:41:48" (1/1) ... [2024-11-14 05:41:48,945 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:41:48" (1/1) ... [2024-11-14 05:41:48,998 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:41:48" (1/1) ... [2024-11-14 05:41:48,999 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:41:48" (1/1) ... [2024-11-14 05:41:49,407 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:41:48" (1/1) ... [2024-11-14 05:41:49,511 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:41:48" (1/1) ... [2024-11-14 05:41:49,539 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:41:48" (1/1) ... [2024-11-14 05:41:49,562 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:41:48" (1/1) ... [2024-11-14 05:41:49,624 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:41:49,625 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:41:49,625 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:41:49,625 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:41:49,626 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:41:48" (1/1) ... [2024-11-14 05:41:49,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:41:49,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:41:49,661 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:41:49,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:41:49,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:41:49,694 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-14 05:41:49,694 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-14 05:41:49,694 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 05:41:49,695 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 05:41:49,695 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-14 05:41:49,695 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-14 05:41:49,695 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-14 05:41:49,695 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-14 05:41:49,695 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-14 05:41:49,695 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-14 05:41:49,695 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-14 05:41:49,695 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-14 05:41:49,695 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-14 05:41:49,696 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-14 05:41:49,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 05:41:49,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:41:49,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:41:49,903 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:41:49,905 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:42:00,833 INFO L? ?]: Removed 1765 outVars from TransFormulas that were not future-live. [2024-11-14 05:42:00,833 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:42:03,218 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:42:03,218 INFO L316 CfgBuilder]: Removed 17 assume(true) statements. [2024-11-14 05:42:03,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:42:03 BoogieIcfgContainer [2024-11-14 05:42:03,219 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:42:03,221 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:42:03,221 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:42:03,229 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:42:03,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:41:44" (1/3) ... [2024-11-14 05:42:03,230 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b820116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:42:03, skipping insertion in model container [2024-11-14 05:42:03,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:41:48" (2/3) ... [2024-11-14 05:42:03,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b820116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:42:03, skipping insertion in model container [2024-11-14 05:42:03,231 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:42:03" (3/3) ... [2024-11-14 05:42:03,232 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.15.cil.c [2024-11-14 05:42:03,248 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:42:03,251 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem05_label45+token_ring.15.cil.c that has 8 procedures, 1862 locations, 1 initial locations, 17 loop locations, and 2 error locations. [2024-11-14 05:42:03,351 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:42:03,362 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;@14dc3d85, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:42:03,363 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 05:42:03,373 INFO L276 IsEmpty]: Start isEmpty. Operand has 1862 states, 1823 states have (on average 1.9467910038398244) internal successors, (3549), 1828 states have internal predecessors, (3549), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-14 05:42:03,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 05:42:03,384 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:03,385 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:42:03,385 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:03,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:03,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1447729746, now seen corresponding path program 1 times [2024-11-14 05:42:03,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:03,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925067053] [2024-11-14 05:42:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:03,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:42:04,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:04,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925067053] [2024-11-14 05:42:04,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925067053] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:42:04,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:42:04,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:42:04,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571566118] [2024-11-14 05:42:04,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:42:04,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:42:04,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:04,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:42:04,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:42:04,131 INFO L87 Difference]: Start difference. First operand has 1862 states, 1823 states have (on average 1.9467910038398244) internal successors, (3549), 1828 states have internal predecessors, (3549), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 05:42:05,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:05,560 INFO L93 Difference]: Finished difference Result 3919 states and 7545 transitions. [2024-11-14 05:42:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:42:05,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2024-11-14 05:42:05,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:05,590 INFO L225 Difference]: With dead ends: 3919 [2024-11-14 05:42:05,590 INFO L226 Difference]: Without dead ends: 2056 [2024-11-14 05:42:05,602 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 [2024-11-14 05:42:05,606 INFO L432 NwaCegarLoop]: 3577 mSDtfsCounter, 3848 mSDsluCounter, 3473 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3848 SdHoareTripleChecker+Valid, 7050 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:05,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3848 Valid, 7050 Invalid, 758 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 05:42:05,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2056 states. [2024-11-14 05:42:05,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2056 to 2055. [2024-11-14 05:42:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 1989 states have (on average 1.903469079939668) internal successors, (3786), 1993 states have internal predecessors, (3786), 52 states have call successors, (52), 13 states have call predecessors, (52), 12 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-14 05:42:05,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 3888 transitions. [2024-11-14 05:42:05,799 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 3888 transitions. Word has length 71 [2024-11-14 05:42:05,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:05,799 INFO L471 AbstractCegarLoop]: Abstraction has 2055 states and 3888 transitions. [2024-11-14 05:42:05,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 05:42:05,800 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 3888 transitions. [2024-11-14 05:42:05,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 05:42:05,808 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:05,808 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:42:05,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:42:05,809 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:05,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:05,810 INFO L85 PathProgramCache]: Analyzing trace with hash -200180373, now seen corresponding path program 1 times [2024-11-14 05:42:05,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:05,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456133470] [2024-11-14 05:42:05,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:05,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:42:06,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:06,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456133470] [2024-11-14 05:42:06,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456133470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:42:06,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144124115] [2024-11-14 05:42:06,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:06,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:06,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:42:06,350 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:42:06,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:42:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:06,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:42:06,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:42:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 05:42:06,792 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:42:06,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144124115] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:42:06,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:42:06,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:42:06,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344785797] [2024-11-14 05:42:06,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:42:06,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:42:06,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:06,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:42:06,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:06,796 INFO L87 Difference]: Start difference. First operand 2055 states and 3888 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:42:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:07,475 INFO L93 Difference]: Finished difference Result 2866 states and 5133 transitions. [2024-11-14 05:42:07,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:42:07,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2024-11-14 05:42:07,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:07,500 INFO L225 Difference]: With dead ends: 2866 [2024-11-14 05:42:07,500 INFO L226 Difference]: Without dead ends: 2457 [2024-11-14 05:42:07,503 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:07,504 INFO L432 NwaCegarLoop]: 3389 mSDtfsCounter, 3547 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3547 SdHoareTripleChecker+Valid, 3651 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:07,505 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3547 Valid, 3651 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:42:07,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2024-11-14 05:42:07,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2451. [2024-11-14 05:42:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2451 states, 2329 states have (on average 1.841562902533276) internal successors, (4289), 2334 states have internal predecessors, (4289), 96 states have call successors, (96), 25 states have call predecessors, (96), 24 states have return successors, (94), 92 states have call predecessors, (94), 94 states have call successors, (94) [2024-11-14 05:42:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2451 states to 2451 states and 4479 transitions. [2024-11-14 05:42:07,667 INFO L78 Accepts]: Start accepts. Automaton has 2451 states and 4479 transitions. Word has length 145 [2024-11-14 05:42:07,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:07,669 INFO L471 AbstractCegarLoop]: Abstraction has 2451 states and 4479 transitions. [2024-11-14 05:42:07,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:42:07,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2451 states and 4479 transitions. [2024-11-14 05:42:07,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 05:42:07,680 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:07,680 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:42:07,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 05:42:07,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:07,881 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:07,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:07,885 INFO L85 PathProgramCache]: Analyzing trace with hash -722560787, now seen corresponding path program 1 times [2024-11-14 05:42:07,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:07,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398634180] [2024-11-14 05:42:07,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:07,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:42:08,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:08,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398634180] [2024-11-14 05:42:08,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398634180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:42:08,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109775522] [2024-11-14 05:42:08,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:08,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:08,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:42:08,256 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:42:08,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:42:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:08,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:42:08,580 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:42:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 05:42:08,662 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:42:08,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109775522] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:42:08,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:42:08,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:42:08,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517817835] [2024-11-14 05:42:08,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:42:08,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:42:08,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:08,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:42:08,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:08,668 INFO L87 Difference]: Start difference. First operand 2451 states and 4479 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:42:09,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:09,389 INFO L93 Difference]: Finished difference Result 4048 states and 6926 transitions. [2024-11-14 05:42:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:42:09,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2024-11-14 05:42:09,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:09,406 INFO L225 Difference]: With dead ends: 4048 [2024-11-14 05:42:09,407 INFO L226 Difference]: Without dead ends: 3243 [2024-11-14 05:42:09,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:09,412 INFO L432 NwaCegarLoop]: 3387 mSDtfsCounter, 3565 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3565 SdHoareTripleChecker+Valid, 3649 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:09,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3565 Valid, 3649 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:42:09,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3243 states. [2024-11-14 05:42:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3243 to 3235. [2024-11-14 05:42:09,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3235 states, 3003 states have (on average 1.7592407592407593) internal successors, (5283), 3010 states have internal predecessors, (5283), 182 states have call successors, (182), 49 states have call predecessors, (182), 48 states have return successors, (180), 176 states have call predecessors, (180), 180 states have call successors, (180) [2024-11-14 05:42:09,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3235 states to 3235 states and 5645 transitions. [2024-11-14 05:42:09,549 INFO L78 Accepts]: Start accepts. Automaton has 3235 states and 5645 transitions. Word has length 145 [2024-11-14 05:42:09,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:09,549 INFO L471 AbstractCegarLoop]: Abstraction has 3235 states and 5645 transitions. [2024-11-14 05:42:09,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:42:09,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3235 states and 5645 transitions. [2024-11-14 05:42:09,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 05:42:09,560 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:09,560 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:42:09,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 05:42:09,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:09,761 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:09,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:09,761 INFO L85 PathProgramCache]: Analyzing trace with hash -2124376081, now seen corresponding path program 1 times [2024-11-14 05:42:09,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:09,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583113790] [2024-11-14 05:42:09,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:09,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:42:09,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:09,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583113790] [2024-11-14 05:42:09,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583113790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:42:09,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128769507] [2024-11-14 05:42:09,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:09,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:09,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:42:09,977 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:42:09,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:42:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:10,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:42:10,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:42:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 05:42:10,298 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:42:10,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128769507] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:42:10,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:42:10,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:42:10,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028692284] [2024-11-14 05:42:10,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:42:10,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:42:10,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:10,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:42:10,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:10,300 INFO L87 Difference]: Start difference. First operand 3235 states and 5645 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:42:10,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:10,972 INFO L93 Difference]: Finished difference Result 6388 states and 10462 transitions. [2024-11-14 05:42:10,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:42:10,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2024-11-14 05:42:10,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:10,997 INFO L225 Difference]: With dead ends: 6388 [2024-11-14 05:42:10,997 INFO L226 Difference]: Without dead ends: 4799 [2024-11-14 05:42:11,004 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:11,005 INFO L432 NwaCegarLoop]: 3326 mSDtfsCounter, 3559 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3559 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:11,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3559 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:42:11,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4799 states. [2024-11-14 05:42:11,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4799 to 4787. [2024-11-14 05:42:11,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4787 states, 4339 states have (on average 1.6702005070292694) internal successors, (7247), 4350 states have internal predecessors, (7247), 350 states have call successors, (350), 97 states have call predecessors, (350), 96 states have return successors, (348), 340 states have call predecessors, (348), 348 states have call successors, (348) [2024-11-14 05:42:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4787 states to 4787 states and 7945 transitions. [2024-11-14 05:42:11,215 INFO L78 Accepts]: Start accepts. Automaton has 4787 states and 7945 transitions. Word has length 145 [2024-11-14 05:42:11,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:11,216 INFO L471 AbstractCegarLoop]: Abstraction has 4787 states and 7945 transitions. [2024-11-14 05:42:11,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 2 states have internal predecessors, (96), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:42:11,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4787 states and 7945 transitions. [2024-11-14 05:42:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 05:42:11,228 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:11,228 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:42:11,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 05:42:11,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:11,429 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:11,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:11,430 INFO L85 PathProgramCache]: Analyzing trace with hash -285835151, now seen corresponding path program 1 times [2024-11-14 05:42:11,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:11,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5734951] [2024-11-14 05:42:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:11,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:11,651 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:42:11,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:11,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5734951] [2024-11-14 05:42:11,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5734951] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:42:11,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189964208] [2024-11-14 05:42:11,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:11,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:11,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:42:11,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:42:11,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:42:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:11,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:42:11,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:42:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 05:42:11,951 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:42:11,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189964208] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:42:11,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:42:11,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:42:11,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364411210] [2024-11-14 05:42:11,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:42:11,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:42:11,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:11,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:42:11,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:11,953 INFO L87 Difference]: Start difference. First operand 4787 states and 7945 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:42:12,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:12,699 INFO L93 Difference]: Finished difference Result 11020 states and 17434 transitions. [2024-11-14 05:42:12,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:42:12,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2024-11-14 05:42:12,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:12,743 INFO L225 Difference]: With dead ends: 11020 [2024-11-14 05:42:12,743 INFO L226 Difference]: Without dead ends: 7879 [2024-11-14 05:42:12,757 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:12,758 INFO L432 NwaCegarLoop]: 3326 mSDtfsCounter, 3568 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3568 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:12,758 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3568 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:42:12,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7879 states. [2024-11-14 05:42:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7879 to 7859. [2024-11-14 05:42:13,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7859 states, 6987 states have (on average 1.5925289823958781) internal successors, (11127), 7006 states have internal predecessors, (11127), 678 states have call successors, (678), 193 states have call predecessors, (678), 192 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2024-11-14 05:42:13,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7859 states to 7859 states and 12481 transitions. [2024-11-14 05:42:13,069 INFO L78 Accepts]: Start accepts. Automaton has 7859 states and 12481 transitions. Word has length 145 [2024-11-14 05:42:13,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:13,070 INFO L471 AbstractCegarLoop]: Abstraction has 7859 states and 12481 transitions. [2024-11-14 05:42:13,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:42:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand 7859 states and 12481 transitions. [2024-11-14 05:42:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 05:42:13,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:13,085 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:42:13,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 05:42:13,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:13,286 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:13,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:13,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1798239697, now seen corresponding path program 1 times [2024-11-14 05:42:13,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:13,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088697911] [2024-11-14 05:42:13,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:13,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:42:13,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:13,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088697911] [2024-11-14 05:42:13,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088697911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:42:13,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650145559] [2024-11-14 05:42:13,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:13,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:13,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:42:13,507 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:42:13,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:42:13,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:13,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:42:13,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:42:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:42:13,825 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:42:13,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650145559] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:42:13,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:42:13,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:42:13,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589633089] [2024-11-14 05:42:13,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:42:13,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:42:13,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:13,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:42:13,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:13,827 INFO L87 Difference]: Start difference. First operand 7859 states and 12481 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:42:14,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:14,810 INFO L93 Difference]: Finished difference Result 20188 states and 31178 transitions. [2024-11-14 05:42:14,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:42:14,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2024-11-14 05:42:14,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:14,900 INFO L225 Difference]: With dead ends: 20188 [2024-11-14 05:42:14,901 INFO L226 Difference]: Without dead ends: 13975 [2024-11-14 05:42:14,925 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:14,927 INFO L432 NwaCegarLoop]: 3326 mSDtfsCounter, 3538 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3538 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:14,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3538 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 05:42:14,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13975 states. [2024-11-14 05:42:15,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13975 to 13939. [2024-11-14 05:42:15,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13939 states, 12235 states have (on average 1.5358398038414385) internal successors, (18791), 12270 states have internal predecessors, (18791), 1318 states have call successors, (1318), 385 states have call predecessors, (1318), 384 states have return successors, (1316), 1284 states have call predecessors, (1316), 1316 states have call successors, (1316) [2024-11-14 05:42:15,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13939 states to 13939 states and 21425 transitions. [2024-11-14 05:42:15,501 INFO L78 Accepts]: Start accepts. Automaton has 13939 states and 21425 transitions. Word has length 145 [2024-11-14 05:42:15,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:15,502 INFO L471 AbstractCegarLoop]: Abstraction has 13939 states and 21425 transitions. [2024-11-14 05:42:15,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 2 states have internal predecessors, (117), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:42:15,502 INFO L276 IsEmpty]: Start isEmpty. Operand 13939 states and 21425 transitions. [2024-11-14 05:42:15,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 05:42:15,526 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:15,526 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:42:15,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 05:42:15,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:15,727 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:15,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:15,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1150850157, now seen corresponding path program 1 times [2024-11-14 05:42:15,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:15,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365171602] [2024-11-14 05:42:15,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:15,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:42:15,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:15,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365171602] [2024-11-14 05:42:15,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365171602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:42:15,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249234330] [2024-11-14 05:42:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:15,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:15,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:42:15,925 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:42:15,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:42:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:16,179 INFO L255 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:42:16,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:42:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:42:16,267 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:42:16,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249234330] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:42:16,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:42:16,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:42:16,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164180209] [2024-11-14 05:42:16,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:42:16,269 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:42:16,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:42:16,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:16,273 INFO L87 Difference]: Start difference. First operand 13939 states and 21425 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:42:17,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:17,498 INFO L93 Difference]: Finished difference Result 38332 states and 58266 transitions. [2024-11-14 05:42:17,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:42:17,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2024-11-14 05:42:17,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:17,630 INFO L225 Difference]: With dead ends: 38332 [2024-11-14 05:42:17,630 INFO L226 Difference]: Without dead ends: 26039 [2024-11-14 05:42:17,671 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:17,672 INFO L432 NwaCegarLoop]: 3326 mSDtfsCounter, 3541 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3541 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:17,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3541 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:42:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26039 states. [2024-11-14 05:42:18,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26039 to 25971. [2024-11-14 05:42:18,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25971 states, 22635 states have (on average 1.4988734261100067) internal successors, (33927), 22702 states have internal predecessors, (33927), 2566 states have call successors, (2566), 769 states have call predecessors, (2566), 768 states have return successors, (2564), 2500 states have call predecessors, (2564), 2564 states have call successors, (2564) [2024-11-14 05:42:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25971 states to 25971 states and 39057 transitions. [2024-11-14 05:42:18,587 INFO L78 Accepts]: Start accepts. Automaton has 25971 states and 39057 transitions. Word has length 145 [2024-11-14 05:42:18,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:18,588 INFO L471 AbstractCegarLoop]: Abstraction has 25971 states and 39057 transitions. [2024-11-14 05:42:18,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:42:18,588 INFO L276 IsEmpty]: Start isEmpty. Operand 25971 states and 39057 transitions. [2024-11-14 05:42:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 05:42:18,632 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:18,632 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:42:18,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 05:42:18,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:18,833 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:18,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:18,834 INFO L85 PathProgramCache]: Analyzing trace with hash -364316305, now seen corresponding path program 1 times [2024-11-14 05:42:18,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:18,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898820541] [2024-11-14 05:42:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:18,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:19,026 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:42:19,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:19,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898820541] [2024-11-14 05:42:19,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898820541] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:42:19,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870920934] [2024-11-14 05:42:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:19,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:19,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:42:19,029 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:42:19,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:42:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:19,292 INFO L255 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:42:19,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:42:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 05:42:19,362 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:42:19,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870920934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:42:19,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:42:19,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:42:19,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389767641] [2024-11-14 05:42:19,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:42:19,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:42:19,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:19,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:42:19,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:19,363 INFO L87 Difference]: Start difference. First operand 25971 states and 39057 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:42:21,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:21,284 INFO L93 Difference]: Finished difference Result 74236 states and 111642 transitions. [2024-11-14 05:42:21,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:42:21,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 145 [2024-11-14 05:42:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:21,523 INFO L225 Difference]: With dead ends: 74236 [2024-11-14 05:42:21,523 INFO L226 Difference]: Without dead ends: 49911 [2024-11-14 05:42:21,583 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:21,584 INFO L432 NwaCegarLoop]: 3326 mSDtfsCounter, 3553 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3553 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:21,584 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3553 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:42:21,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49911 states. [2024-11-14 05:42:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49911 to 49779. [2024-11-14 05:42:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49779 states, 43243 states have (on average 1.4757301759822399) internal successors, (63815), 43374 states have internal predecessors, (63815), 4998 states have call successors, (4998), 1537 states have call predecessors, (4998), 1536 states have return successors, (4996), 4868 states have call predecessors, (4996), 4996 states have call successors, (4996) [2024-11-14 05:42:23,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49779 states to 49779 states and 73809 transitions. [2024-11-14 05:42:23,641 INFO L78 Accepts]: Start accepts. Automaton has 49779 states and 73809 transitions. Word has length 145 [2024-11-14 05:42:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:23,642 INFO L471 AbstractCegarLoop]: Abstraction has 49779 states and 73809 transitions. [2024-11-14 05:42:23,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:42:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 49779 states and 73809 transitions. [2024-11-14 05:42:23,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 05:42:23,744 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:23,744 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:42:23,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 05:42:23,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:23,945 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:23,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:23,946 INFO L85 PathProgramCache]: Analyzing trace with hash 378530673, now seen corresponding path program 1 times [2024-11-14 05:42:23,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:23,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137439388] [2024-11-14 05:42:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:23,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-14 05:42:24,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:24,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137439388] [2024-11-14 05:42:24,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137439388] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:42:24,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:42:24,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 05:42:24,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713281611] [2024-11-14 05:42:24,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:42:24,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 05:42:24,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:24,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 05:42:24,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:42:24,643 INFO L87 Difference]: Start difference. First operand 49779 states and 73809 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 05:42:30,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:30,468 INFO L93 Difference]: Finished difference Result 157179 states and 232279 transitions. [2024-11-14 05:42:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 05:42:30,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 145 [2024-11-14 05:42:30,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:30,978 INFO L225 Difference]: With dead ends: 157179 [2024-11-14 05:42:30,978 INFO L226 Difference]: Without dead ends: 109047 [2024-11-14 05:42:31,085 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 [2024-11-14 05:42:31,087 INFO L432 NwaCegarLoop]: 3348 mSDtfsCounter, 4217 mSDsluCounter, 6646 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4239 SdHoareTripleChecker+Valid, 9994 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:31,087 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4239 Valid, 9994 Invalid, 1079 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [128 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 05:42:31,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109047 states. [2024-11-14 05:42:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109047 to 96371. [2024-11-14 05:42:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96371 states, 83563 states have (on average 1.4606344913418619) internal successors, (122055), 83822 states have internal predecessors, (122055), 9734 states have call successors, (9734), 3073 states have call predecessors, (9734), 3072 states have return successors, (9732), 9476 states have call predecessors, (9732), 9732 states have call successors, (9732) [2024-11-14 05:42:35,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96371 states to 96371 states and 141521 transitions. [2024-11-14 05:42:35,585 INFO L78 Accepts]: Start accepts. Automaton has 96371 states and 141521 transitions. Word has length 145 [2024-11-14 05:42:35,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:35,586 INFO L471 AbstractCegarLoop]: Abstraction has 96371 states and 141521 transitions. [2024-11-14 05:42:35,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 05:42:35,586 INFO L276 IsEmpty]: Start isEmpty. Operand 96371 states and 141521 transitions. [2024-11-14 05:42:35,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-11-14 05:42:35,737 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:35,737 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:42:35,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 05:42:35,738 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:35,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:35,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1922070309, now seen corresponding path program 1 times [2024-11-14 05:42:35,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:35,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868820666] [2024-11-14 05:42:35,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:35,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 44 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 05:42:36,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:36,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868820666] [2024-11-14 05:42:36,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868820666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:42:36,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277368251] [2024-11-14 05:42:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:36,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:36,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:42:36,221 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:42:36,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:42:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:36,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:42:36,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:42:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-14 05:42:36,576 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:42:36,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277368251] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:42:36,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:42:36,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 05:42:36,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379156518] [2024-11-14 05:42:36,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:42:36,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:42:36,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:36,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:42:36,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:42:36,578 INFO L87 Difference]: Start difference. First operand 96371 states and 141521 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:42:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:40,815 INFO L93 Difference]: Finished difference Result 171511 states and 254548 transitions. [2024-11-14 05:42:40,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:42:40,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 169 [2024-11-14 05:42:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:41,609 INFO L225 Difference]: With dead ends: 171511 [2024-11-14 05:42:41,610 INFO L226 Difference]: Without dead ends: 123123 [2024-11-14 05:42:41,730 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:42:41,735 INFO L432 NwaCegarLoop]: 3480 mSDtfsCounter, 147 mSDsluCounter, 3340 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 6820 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:41,735 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 6820 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 05:42:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123123 states. [2024-11-14 05:42:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123123 to 116979. [2024-11-14 05:42:46,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116979 states, 103659 states have (on average 1.4886406390183198) internal successors, (154311), 103918 states have internal predecessors, (154311), 9990 states have call successors, (9990), 3329 states have call predecessors, (9990), 3328 states have return successors, (9988), 9732 states have call predecessors, (9988), 9988 states have call successors, (9988) [2024-11-14 05:42:47,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116979 states to 116979 states and 174289 transitions. [2024-11-14 05:42:47,466 INFO L78 Accepts]: Start accepts. Automaton has 116979 states and 174289 transitions. Word has length 169 [2024-11-14 05:42:47,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:42:47,466 INFO L471 AbstractCegarLoop]: Abstraction has 116979 states and 174289 transitions. [2024-11-14 05:42:47,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:42:47,467 INFO L276 IsEmpty]: Start isEmpty. Operand 116979 states and 174289 transitions. [2024-11-14 05:42:47,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-11-14 05:42:47,778 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:42:47,778 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:42:47,799 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 05:42:47,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 05:42:47,979 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:42:47,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:42:47,980 INFO L85 PathProgramCache]: Analyzing trace with hash 686327546, now seen corresponding path program 1 times [2024-11-14 05:42:47,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:42:47,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601115862] [2024-11-14 05:42:47,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:47,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:42:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 10 proven. 87 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-14 05:42:48,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:42:48,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601115862] [2024-11-14 05:42:48,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601115862] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:42:48,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495767622] [2024-11-14 05:42:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:42:48,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:42:48,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:42:48,497 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:42:48,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7362701e-9de3-4a2f-9733-70f6a67f6141/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:42:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:42:48,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 1217 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:42:48,842 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:42:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-14 05:42:49,121 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:42:49,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495767622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:42:49,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:42:49,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2024-11-14 05:42:49,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937398998] [2024-11-14 05:42:49,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:42:49,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:42:49,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:42:49,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:42:49,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:42:49,126 INFO L87 Difference]: Start difference. First operand 116979 states and 174289 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-14 05:42:55,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:42:55,772 INFO L93 Difference]: Finished difference Result 346108 states and 519898 transitions. [2024-11-14 05:42:55,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:42:55,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 223 [2024-11-14 05:42:55,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:42:56,722 INFO L225 Difference]: With dead ends: 346108 [2024-11-14 05:42:56,722 INFO L226 Difference]: Without dead ends: 230775 [2024-11-14 05:42:56,973 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:42:56,974 INFO L432 NwaCegarLoop]: 3326 mSDtfsCounter, 3487 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3487 SdHoareTripleChecker+Valid, 3588 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:42:56,974 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3487 Valid, 3588 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:42:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230775 states.