./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.05.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje --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 a75784c0f203c4a6f14019aef9d9a89ba63a0efbe594dc5cdecfb5d06e7619f2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 07:02:29,361 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 07:02:29,484 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 07:02:29,496 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 07:02:29,498 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 07:02:29,527 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 07:02:29,528 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 07:02:29,528 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 07:02:29,529 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 07:02:29,529 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 07:02:29,530 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 07:02:29,530 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 07:02:29,531 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 07:02:29,531 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 07:02:29,532 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 07:02:29,533 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 07:02:29,533 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 07:02:29,534 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 07:02:29,534 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 07:02:29,535 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 07:02:29,535 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 07:02:29,536 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 07:02:29,537 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 07:02:29,537 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 07:02:29,538 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 07:02:29,542 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 07:02:29,543 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 07:02:29,543 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 07:02:29,544 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 07:02:29,544 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 07:02:29,544 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 07:02:29,545 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 07:02:29,545 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 07:02:29,545 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 07:02:29,546 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 07:02:29,546 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 07:02:29,546 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 07:02:29,547 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 07:02:29,547 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:02:29,550 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 07:02:29,551 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 07:02:29,551 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 07:02:29,552 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 07:02:29,552 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 07:02:29,553 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 07:02:29,553 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 07:02:29,553 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 07:02:29,554 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a75784c0f203c4a6f14019aef9d9a89ba63a0efbe594dc5cdecfb5d06e7619f2 [2024-11-09 07:02:29,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 07:02:29,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 07:02:29,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 07:02:29,926 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 07:02:29,927 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 07:02:29,929 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/systemc/token_ring.05.cil-1.c Unable to find full path for "g++" [2024-11-09 07:02:32,308 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 07:02:32,649 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 07:02:32,651 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/sv-benchmarks/c/systemc/token_ring.05.cil-1.c [2024-11-09 07:02:32,670 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/data/951af1582/6e6bbce6234c41a3afcc5bed0d15655f/FLAGbd6f9fbe5 [2024-11-09 07:02:32,904 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/data/951af1582/6e6bbce6234c41a3afcc5bed0d15655f [2024-11-09 07:02:32,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 07:02:32,909 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 07:02:32,911 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 07:02:32,911 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 07:02:32,918 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 07:02:32,919 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:02:32" (1/1) ... [2024-11-09 07:02:32,920 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2851bf04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:02:32, skipping insertion in model container [2024-11-09 07:02:32,921 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 07:02:32" (1/1) ... [2024-11-09 07:02:32,965 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 07:02:33,146 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_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/sv-benchmarks/c/systemc/token_ring.05.cil-1.c[671,684] [2024-11-09 07:02:33,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:02:33,273 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 07:02:33,286 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_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/sv-benchmarks/c/systemc/token_ring.05.cil-1.c[671,684] [2024-11-09 07:02:33,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 07:02:33,355 INFO L204 MainTranslator]: Completed translation [2024-11-09 07:02:33,356 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:02:33 WrapperNode [2024-11-09 07:02:33,356 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 07:02:33,357 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 07:02:33,357 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 07:02:33,358 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 07:02:33,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:02:33" (1/1) ... [2024-11-09 07:02:33,375 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:02:33" (1/1) ... [2024-11-09 07:02:33,408 INFO L138 Inliner]: procedures = 38, calls = 46, calls flagged for inlining = 22, calls inlined = 22, statements flattened = 451 [2024-11-09 07:02:33,409 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 07:02:33,409 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 07:02:33,409 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 07:02:33,409 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 07:02:33,420 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:02:33" (1/1) ... [2024-11-09 07:02:33,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:02:33" (1/1) ... [2024-11-09 07:02:33,428 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:02:33" (1/1) ... [2024-11-09 07:02:33,428 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:02:33" (1/1) ... [2024-11-09 07:02:33,439 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:02:33" (1/1) ... [2024-11-09 07:02:33,448 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:02:33" (1/1) ... [2024-11-09 07:02:33,450 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:02:33" (1/1) ... [2024-11-09 07:02:33,452 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:02:33" (1/1) ... [2024-11-09 07:02:33,458 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 07:02:33,459 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 07:02:33,459 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 07:02:33,459 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 07:02:33,460 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:02:33" (1/1) ... [2024-11-09 07:02:33,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 07:02:33,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:02:33,511 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 07:02:33,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 07:02:33,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 07:02:33,549 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-09 07:02:33,550 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-09 07:02:33,550 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-09 07:02:33,550 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-09 07:02:33,550 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 07:02:33,552 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 07:02:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-09 07:02:33,552 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-09 07:02:33,552 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-09 07:02:33,553 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-09 07:02:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 07:02:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-09 07:02:33,553 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-09 07:02:33,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 07:02:33,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 07:02:33,658 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 07:02:33,660 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 07:02:34,346 INFO L? ?]: Removed 55 outVars from TransFormulas that were not future-live. [2024-11-09 07:02:34,346 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 07:02:34,704 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 07:02:34,706 INFO L316 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-09 07:02:34,707 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:02:34 BoogieIcfgContainer [2024-11-09 07:02:34,708 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 07:02:34,710 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 07:02:34,711 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 07:02:34,715 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 07:02:34,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 07:02:32" (1/3) ... [2024-11-09 07:02:34,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ef0378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:02:34, skipping insertion in model container [2024-11-09 07:02:34,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 07:02:33" (2/3) ... [2024-11-09 07:02:34,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ef0378 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 07:02:34, skipping insertion in model container [2024-11-09 07:02:34,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 07:02:34" (3/3) ... [2024-11-09 07:02:34,718 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.05.cil-1.c [2024-11-09 07:02:34,740 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 07:02:34,740 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 07:02:34,820 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 07:02:34,827 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;@6f9ca345, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 07:02:34,827 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 07:02:34,834 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 90 states have (on average 1.488888888888889) internal successors, (134), 92 states have internal predecessors, (134), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-09 07:02:34,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 07:02:34,847 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:34,848 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] [2024-11-09 07:02:34,848 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:34,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:34,856 INFO L85 PathProgramCache]: Analyzing trace with hash -815325959, now seen corresponding path program 1 times [2024-11-09 07:02:34,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:34,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369724826] [2024-11-09 07:02:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:34,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 07:02:35,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:02:35,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369724826] [2024-11-09 07:02:35,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369724826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:02:35,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:02:35,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 07:02:35,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012992055] [2024-11-09 07:02:35,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:02:35,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 07:02:35,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:02:35,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 07:02:35,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 07:02:35,478 INFO L87 Difference]: Start difference. First operand has 117 states, 90 states have (on average 1.488888888888889) internal successors, (134), 92 states have internal predecessors, (134), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 07:02:35,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:02:35,924 INFO L93 Difference]: Finished difference Result 334 states and 508 transitions. [2024-11-09 07:02:35,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 07:02:35,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2024-11-09 07:02:35,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:02:35,939 INFO L225 Difference]: With dead ends: 334 [2024-11-09 07:02:35,940 INFO L226 Difference]: Without dead ends: 218 [2024-11-09 07:02:35,946 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 [2024-11-09 07:02:35,951 INFO L432 NwaCegarLoop]: 256 mSDtfsCounter, 289 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 07:02:35,954 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 442 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 07:02:35,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-09 07:02:36,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2024-11-09 07:02:36,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 170 states have (on average 1.411764705882353) internal successors, (240), 172 states have internal predecessors, (240), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2024-11-09 07:02:36,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 308 transitions. [2024-11-09 07:02:36,048 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 308 transitions. Word has length 45 [2024-11-09 07:02:36,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:02:36,048 INFO L471 AbstractCegarLoop]: Abstraction has 217 states and 308 transitions. [2024-11-09 07:02:36,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 07:02:36,049 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 308 transitions. [2024-11-09 07:02:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 07:02:36,058 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:36,058 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:02:36,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 07:02:36,059 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:36,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:36,060 INFO L85 PathProgramCache]: Analyzing trace with hash -19604198, now seen corresponding path program 1 times [2024-11-09 07:02:36,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:36,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271036395] [2024-11-09 07:02:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:36,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:02:36,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:02:36,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271036395] [2024-11-09 07:02:36,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271036395] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:02:36,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057846123] [2024-11-09 07:02:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:36,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:36,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:02:36,388 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:02:36,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 07:02:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:36,590 INFO L255 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:02:36,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:02:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 07:02:36,683 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:02:36,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057846123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:02:36,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:02:36,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 07:02:36,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87764018] [2024-11-09 07:02:36,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:02:36,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:02:36,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:02:36,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:02:36,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:02:36,692 INFO L87 Difference]: Start difference. First operand 217 states and 308 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:02:36,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:02:36,829 INFO L93 Difference]: Finished difference Result 634 states and 913 transitions. [2024-11-09 07:02:36,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:02:36,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2024-11-09 07:02:36,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:02:36,835 INFO L225 Difference]: With dead ends: 634 [2024-11-09 07:02:36,835 INFO L226 Difference]: Without dead ends: 422 [2024-11-09 07:02:36,837 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:02:36,838 INFO L432 NwaCegarLoop]: 174 mSDtfsCounter, 141 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:02:36,839 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 300 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:02:36,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2024-11-09 07:02:36,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 418. [2024-11-09 07:02:36,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 331 states have (on average 1.404833836858006) internal successors, (465), 334 states have internal predecessors, (465), 62 states have call successors, (62), 24 states have call predecessors, (62), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2024-11-09 07:02:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 589 transitions. [2024-11-09 07:02:36,880 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 589 transitions. Word has length 87 [2024-11-09 07:02:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:02:36,881 INFO L471 AbstractCegarLoop]: Abstraction has 418 states and 589 transitions. [2024-11-09 07:02:36,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:02:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 589 transitions. [2024-11-09 07:02:36,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 07:02:36,885 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:36,885 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:02:36,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 07:02:37,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:37,090 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:37,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:37,091 INFO L85 PathProgramCache]: Analyzing trace with hash -923476324, now seen corresponding path program 1 times [2024-11-09 07:02:37,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:37,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770813141] [2024-11-09 07:02:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:37,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:37,237 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:02:37,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:02:37,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770813141] [2024-11-09 07:02:37,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770813141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:02:37,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7919217] [2024-11-09 07:02:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:37,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:37,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:02:37,241 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:02:37,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 07:02:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:37,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:02:37,434 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:02:37,486 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 07:02:37,487 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:02:37,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7919217] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:02:37,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:02:37,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 07:02:37,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549038151] [2024-11-09 07:02:37,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:02:37,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:02:37,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:02:37,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:02:37,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:02:37,490 INFO L87 Difference]: Start difference. First operand 418 states and 589 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:02:37,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:02:37,673 INFO L93 Difference]: Finished difference Result 1231 states and 1760 transitions. [2024-11-09 07:02:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:02:37,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2024-11-09 07:02:37,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:02:37,683 INFO L225 Difference]: With dead ends: 1231 [2024-11-09 07:02:37,685 INFO L226 Difference]: Without dead ends: 818 [2024-11-09 07:02:37,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:02:37,691 INFO L432 NwaCegarLoop]: 172 mSDtfsCounter, 138 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:02:37,691 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 298 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:02:37,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2024-11-09 07:02:37,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 812. [2024-11-09 07:02:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 647 states have (on average 1.3956723338485317) internal successors, (903), 652 states have internal predecessors, (903), 116 states have call successors, (116), 48 states have call predecessors, (116), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2024-11-09 07:02:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1135 transitions. [2024-11-09 07:02:37,810 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1135 transitions. Word has length 87 [2024-11-09 07:02:37,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:02:37,812 INFO L471 AbstractCegarLoop]: Abstraction has 812 states and 1135 transitions. [2024-11-09 07:02:37,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 2 states have internal predecessors, (57), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:02:37,812 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1135 transitions. [2024-11-09 07:02:37,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 07:02:37,821 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:37,822 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:02:37,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 07:02:38,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:38,023 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:38,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:38,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1833311322, now seen corresponding path program 1 times [2024-11-09 07:02:38,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:38,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224743184] [2024-11-09 07:02:38,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:38,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:38,168 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 07:02:38,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:02:38,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224743184] [2024-11-09 07:02:38,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224743184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:02:38,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618702380] [2024-11-09 07:02:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:38,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:38,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:02:38,171 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:02:38,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 07:02:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:38,314 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:02:38,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:02:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 07:02:38,380 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:02:38,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618702380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:02:38,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:02:38,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 07:02:38,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940499572] [2024-11-09 07:02:38,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:02:38,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:02:38,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:02:38,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:02:38,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:02:38,385 INFO L87 Difference]: Start difference. First operand 812 states and 1135 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:02:38,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:02:38,571 INFO L93 Difference]: Finished difference Result 2401 states and 3404 transitions. [2024-11-09 07:02:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:02:38,572 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2024-11-09 07:02:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:02:38,581 INFO L225 Difference]: With dead ends: 2401 [2024-11-09 07:02:38,581 INFO L226 Difference]: Without dead ends: 1594 [2024-11-09 07:02:38,584 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:02:38,585 INFO L432 NwaCegarLoop]: 135 mSDtfsCounter, 132 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:02:38,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 261 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:02:38,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1594 states. [2024-11-09 07:02:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1594 to 1584. [2024-11-09 07:02:38,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1267 states have (on average 1.3851617995264405) internal successors, (1755), 1276 states have internal predecessors, (1755), 220 states have call successors, (220), 96 states have call predecessors, (220), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2024-11-09 07:02:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2195 transitions. [2024-11-09 07:02:38,712 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2195 transitions. Word has length 87 [2024-11-09 07:02:38,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:02:38,712 INFO L471 AbstractCegarLoop]: Abstraction has 1584 states and 2195 transitions. [2024-11-09 07:02:38,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 07:02:38,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2195 transitions. [2024-11-09 07:02:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-09 07:02:38,717 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:38,717 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:02:38,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 07:02:38,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:38,918 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:38,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:38,918 INFO L85 PathProgramCache]: Analyzing trace with hash -3145576, now seen corresponding path program 1 times [2024-11-09 07:02:38,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:38,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970207497] [2024-11-09 07:02:38,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:38,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 07:02:39,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:02:39,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970207497] [2024-11-09 07:02:39,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970207497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:02:39,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:02:39,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:02:39,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102757320] [2024-11-09 07:02:39,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:02:39,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:02:39,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:02:39,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:02:39,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:02:39,024 INFO L87 Difference]: Start difference. First operand 1584 states and 2195 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 07:02:39,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:02:39,199 INFO L93 Difference]: Finished difference Result 2834 states and 3972 transitions. [2024-11-09 07:02:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:02:39,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2024-11-09 07:02:39,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:02:39,211 INFO L225 Difference]: With dead ends: 2834 [2024-11-09 07:02:39,212 INFO L226 Difference]: Without dead ends: 2024 [2024-11-09 07:02:39,214 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:02:39,215 INFO L432 NwaCegarLoop]: 209 mSDtfsCounter, 69 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:02:39,216 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 350 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:02:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2024 states. [2024-11-09 07:02:39,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2024 to 1876. [2024-11-09 07:02:39,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1543 states have (on average 1.4173687621516526) internal successors, (2187), 1552 states have internal predecessors, (2187), 228 states have call successors, (228), 104 states have call predecessors, (228), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2024-11-09 07:02:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2643 transitions. [2024-11-09 07:02:39,351 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2643 transitions. Word has length 87 [2024-11-09 07:02:39,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:02:39,355 INFO L471 AbstractCegarLoop]: Abstraction has 1876 states and 2643 transitions. [2024-11-09 07:02:39,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 07:02:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2643 transitions. [2024-11-09 07:02:39,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 07:02:39,366 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:39,366 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:02:39,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 07:02:39,367 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:39,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:39,367 INFO L85 PathProgramCache]: Analyzing trace with hash -977985576, now seen corresponding path program 1 times [2024-11-09 07:02:39,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:39,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909651966] [2024-11-09 07:02:39,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:39,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:39,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 07:02:39,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:02:39,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909651966] [2024-11-09 07:02:39,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909651966] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:02:39,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:02:39,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:02:39,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293913644] [2024-11-09 07:02:39,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:02:39,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:02:39,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:02:39,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:02:39,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:02:39,469 INFO L87 Difference]: Start difference. First operand 1876 states and 2643 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 07:02:39,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:02:39,788 INFO L93 Difference]: Finished difference Result 5545 states and 7888 transitions. [2024-11-09 07:02:39,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:02:39,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 117 [2024-11-09 07:02:39,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:02:39,812 INFO L225 Difference]: With dead ends: 5545 [2024-11-09 07:02:39,812 INFO L226 Difference]: Without dead ends: 3674 [2024-11-09 07:02:39,821 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:02:39,822 INFO L432 NwaCegarLoop]: 137 mSDtfsCounter, 131 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:02:39,823 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 263 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:02:39,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3674 states. [2024-11-09 07:02:40,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3674 to 3648. [2024-11-09 07:02:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 3003 states have (on average 1.4022644022644022) internal successors, (4211), 3020 states have internal predecessors, (4211), 436 states have call successors, (436), 208 states have call predecessors, (436), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2024-11-09 07:02:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 5083 transitions. [2024-11-09 07:02:40,134 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 5083 transitions. Word has length 117 [2024-11-09 07:02:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:02:40,137 INFO L471 AbstractCegarLoop]: Abstraction has 3648 states and 5083 transitions. [2024-11-09 07:02:40,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 07:02:40,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 5083 transitions. [2024-11-09 07:02:40,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 07:02:40,150 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:40,150 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:02:40,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 07:02:40,151 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:40,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:40,151 INFO L85 PathProgramCache]: Analyzing trace with hash -509890812, now seen corresponding path program 1 times [2024-11-09 07:02:40,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:40,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375276700] [2024-11-09 07:02:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:40,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-11-09 07:02:40,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:02:40,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375276700] [2024-11-09 07:02:40,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375276700] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:02:40,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 07:02:40,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 07:02:40,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569296796] [2024-11-09 07:02:40,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:02:40,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:02:40,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:02:40,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:02:40,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:02:40,268 INFO L87 Difference]: Start difference. First operand 3648 states and 5083 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 07:02:40,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:02:40,812 INFO L93 Difference]: Finished difference Result 10789 states and 15168 transitions. [2024-11-09 07:02:40,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:02:40,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 117 [2024-11-09 07:02:40,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:02:40,862 INFO L225 Difference]: With dead ends: 10789 [2024-11-09 07:02:40,862 INFO L226 Difference]: Without dead ends: 7146 [2024-11-09 07:02:40,878 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 07:02:40,879 INFO L432 NwaCegarLoop]: 155 mSDtfsCounter, 134 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:02:40,879 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 281 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:02:40,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7146 states. [2024-11-09 07:02:41,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7146 to 7096. [2024-11-09 07:02:41,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7096 states, 5843 states have (on average 1.386103029265788) internal successors, (8099), 5876 states have internal predecessors, (8099), 836 states have call successors, (836), 416 states have call predecessors, (836), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2024-11-09 07:02:41,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 9771 transitions. [2024-11-09 07:02:41,464 INFO L78 Accepts]: Start accepts. Automaton has 7096 states and 9771 transitions. Word has length 117 [2024-11-09 07:02:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:02:41,464 INFO L471 AbstractCegarLoop]: Abstraction has 7096 states and 9771 transitions. [2024-11-09 07:02:41,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 07:02:41,465 INFO L276 IsEmpty]: Start isEmpty. Operand 7096 states and 9771 transitions. [2024-11-09 07:02:41,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-09 07:02:41,497 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:41,497 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, 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] [2024-11-09 07:02:41,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 07:02:41,498 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:41,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:41,499 INFO L85 PathProgramCache]: Analyzing trace with hash 919020454, now seen corresponding path program 1 times [2024-11-09 07:02:41,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:41,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999814973] [2024-11-09 07:02:41,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:41,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 25 proven. 1 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-09 07:02:41,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:02:41,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999814973] [2024-11-09 07:02:41,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999814973] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:02:41,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650991247] [2024-11-09 07:02:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:41,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:41,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:02:41,702 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:02:41,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 07:02:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:41,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:02:41,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:02:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 07:02:41,969 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:02:41,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650991247] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:02:41,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:02:41,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 07:02:41,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790616903] [2024-11-09 07:02:41,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:02:41,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:02:41,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:02:41,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:02:41,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:02:41,974 INFO L87 Difference]: Start difference. First operand 7096 states and 9771 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:02:42,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:02:42,566 INFO L93 Difference]: Finished difference Result 13052 states and 18221 transitions. [2024-11-09 07:02:42,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:02:42,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 133 [2024-11-09 07:02:42,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:02:42,630 INFO L225 Difference]: With dead ends: 13052 [2024-11-09 07:02:42,631 INFO L226 Difference]: Without dead ends: 9410 [2024-11-09 07:02:42,649 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:02:42,651 INFO L432 NwaCegarLoop]: 205 mSDtfsCounter, 76 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:02:42,651 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 345 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:02:42,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9410 states. [2024-11-09 07:02:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9410 to 8624. [2024-11-09 07:02:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8624 states, 7275 states have (on average 1.4145704467353952) internal successors, (10291), 7308 states have internal predecessors, (10291), 884 states have call successors, (884), 464 states have call predecessors, (884), 464 states have return successors, (884), 852 states have call predecessors, (884), 884 states have call successors, (884) [2024-11-09 07:02:43,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8624 states to 8624 states and 12059 transitions. [2024-11-09 07:02:43,611 INFO L78 Accepts]: Start accepts. Automaton has 8624 states and 12059 transitions. Word has length 133 [2024-11-09 07:02:43,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:02:43,612 INFO L471 AbstractCegarLoop]: Abstraction has 8624 states and 12059 transitions. [2024-11-09 07:02:43,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:02:43,612 INFO L276 IsEmpty]: Start isEmpty. Operand 8624 states and 12059 transitions. [2024-11-09 07:02:43,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-09 07:02:43,643 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:43,643 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, 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] [2024-11-09 07:02:43,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 07:02:43,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:43,848 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:43,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash -409208181, now seen corresponding path program 1 times [2024-11-09 07:02:43,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:43,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079117722] [2024-11-09 07:02:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:43,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 23 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-09 07:02:44,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:02:44,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079117722] [2024-11-09 07:02:44,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079117722] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:02:44,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699799118] [2024-11-09 07:02:44,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:44,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:44,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:02:44,076 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:02:44,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 07:02:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:44,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:02:44,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:02:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 07:02:44,292 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:02:44,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699799118] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:02:44,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:02:44,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 07:02:44,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442645035] [2024-11-09 07:02:44,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:02:44,293 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:02:44,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:02:44,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:02:44,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:02:44,298 INFO L87 Difference]: Start difference. First operand 8624 states and 12059 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:02:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:02:44,841 INFO L93 Difference]: Finished difference Result 16212 states and 22869 transitions. [2024-11-09 07:02:44,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:02:44,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 133 [2024-11-09 07:02:44,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:02:44,900 INFO L225 Difference]: With dead ends: 16212 [2024-11-09 07:02:44,900 INFO L226 Difference]: Without dead ends: 11818 [2024-11-09 07:02:44,914 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:02:44,914 INFO L432 NwaCegarLoop]: 227 mSDtfsCounter, 88 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:02:44,915 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 369 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:02:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11818 states. [2024-11-09 07:02:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11818 to 10808. [2024-11-09 07:02:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10808 states, 9315 states have (on average 1.434567901234568) internal successors, (13363), 9348 states have internal predecessors, (13363), 956 states have call successors, (956), 536 states have call predecessors, (956), 536 states have return successors, (956), 924 states have call predecessors, (956), 956 states have call successors, (956) [2024-11-09 07:02:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10808 states to 10808 states and 15275 transitions. [2024-11-09 07:02:45,483 INFO L78 Accepts]: Start accepts. Automaton has 10808 states and 15275 transitions. Word has length 133 [2024-11-09 07:02:45,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:02:45,484 INFO L471 AbstractCegarLoop]: Abstraction has 10808 states and 15275 transitions. [2024-11-09 07:02:45,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:02:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10808 states and 15275 transitions. [2024-11-09 07:02:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-09 07:02:45,513 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:45,514 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, 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] [2024-11-09 07:02:45,534 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 07:02:45,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:45,714 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:45,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1886324071, now seen corresponding path program 1 times [2024-11-09 07:02:45,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:45,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972232545] [2024-11-09 07:02:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:45,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-11-09 07:02:45,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:02:45,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972232545] [2024-11-09 07:02:45,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972232545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:02:45,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853109763] [2024-11-09 07:02:45,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:45,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:45,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:02:45,859 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:02:45,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 07:02:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:46,027 INFO L255 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:02:46,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:02:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 07:02:46,069 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:02:46,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853109763] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:02:46,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:02:46,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 07:02:46,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917311457] [2024-11-09 07:02:46,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:02:46,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:02:46,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:02:46,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:02:46,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:02:46,073 INFO L87 Difference]: Start difference. First operand 10808 states and 15275 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:02:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:02:46,878 INFO L93 Difference]: Finished difference Result 20692 states and 29481 transitions. [2024-11-09 07:02:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:02:46,879 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 133 [2024-11-09 07:02:46,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:02:46,963 INFO L225 Difference]: With dead ends: 20692 [2024-11-09 07:02:46,963 INFO L226 Difference]: Without dead ends: 15134 [2024-11-09 07:02:46,983 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:02:46,984 INFO L432 NwaCegarLoop]: 232 mSDtfsCounter, 94 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:02:46,985 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 374 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:02:47,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15134 states. [2024-11-09 07:02:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15134 to 14012. [2024-11-09 07:02:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14012 states, 12303 states have (on average 1.4489961797935462) internal successors, (17827), 12336 states have internal predecessors, (17827), 1064 states have call successors, (1064), 644 states have call predecessors, (1064), 644 states have return successors, (1064), 1032 states have call predecessors, (1064), 1064 states have call successors, (1064) [2024-11-09 07:02:47,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14012 states to 14012 states and 19955 transitions. [2024-11-09 07:02:47,866 INFO L78 Accepts]: Start accepts. Automaton has 14012 states and 19955 transitions. Word has length 133 [2024-11-09 07:02:47,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:02:47,866 INFO L471 AbstractCegarLoop]: Abstraction has 14012 states and 19955 transitions. [2024-11-09 07:02:47,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:02:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 14012 states and 19955 transitions. [2024-11-09 07:02:47,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 07:02:47,901 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:02:47,901 INFO L215 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:02:47,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 07:02:48,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:48,102 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:02:48,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:02:48,102 INFO L85 PathProgramCache]: Analyzing trace with hash -944069786, now seen corresponding path program 1 times [2024-11-09 07:02:48,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:02:48,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976645057] [2024-11-09 07:02:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:48,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:02:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 07:02:48,612 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:02:48,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976645057] [2024-11-09 07:02:48,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976645057] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:02:48,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710862078] [2024-11-09 07:02:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:02:48,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:02:48,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:02:48,615 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:02:48,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 07:02:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:02:48,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 07:02:48,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:02:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 60 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 07:02:49,222 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 07:02:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 07:02:49,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710862078] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 07:02:49,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [538611022] [2024-11-09 07:02:49,857 INFO L159 IcfgInterpreter]: Started Sifa with 73 locations of interest [2024-11-09 07:02:49,857 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 07:02:49,861 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 07:02:49,867 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 07:02:49,867 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 07:03:01,921 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 159 for LOIs [2024-11-09 07:03:02,072 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 148 for LOIs [2024-11-09 07:03:02,268 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 40 for LOIs [2024-11-09 07:03:02,273 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 40 for LOIs [2024-11-09 07:03:02,330 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 73 for LOIs [2024-11-09 07:03:02,444 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 40 for LOIs [2024-11-09 07:03:03,191 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 07:03:16,059 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '159735#(and (exists ((|v_ULTIMATE.start_eval_~tmp~0#1_24| Int)) (and (<= |v_ULTIMATE.start_eval_~tmp~0#1_24| 1) (not (= |v_ULTIMATE.start_eval_~tmp~0#1_24| 0)) (<= 0 |v_ULTIMATE.start_eval_~tmp~0#1_24|))) (<= 1 |#StackHeapBarrier|) (<= ~local~0 2147483647) (= 0 ~t5_pc~0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (= 0 ~t3_pc~0) (= ~m_pc~0 1) (= ~m_i~0 1) (exists ((|v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_18| Int)) (and (not (= |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_18| 0)) (<= 0 (+ |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_18| 2147483648)) (<= |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_18| 2147483647))) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (= ~m_st~0 1) (<= ~token~0 2147483647) (= ~t5_i~0 1) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)) (not (= ~token~0 (+ 5 ~local~0))))' at error location [2024-11-09 07:03:16,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 07:03:16,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 07:03:16,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 21 [2024-11-09 07:03:16,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521554077] [2024-11-09 07:03:16,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 07:03:16,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 07:03:16,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:03:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 07:03:16,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=3305, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 07:03:16,063 INFO L87 Difference]: Start difference. First operand 14012 states and 19955 transitions. Second operand has 21 states, 14 states have (on average 14.928571428571429) internal successors, (209), 16 states have internal predecessors, (209), 10 states have call successors, (38), 9 states have call predecessors, (38), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-09 07:03:19,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:03:19,376 INFO L93 Difference]: Finished difference Result 46662 states and 66543 transitions. [2024-11-09 07:03:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 07:03:19,377 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 14.928571428571429) internal successors, (209), 16 states have internal predecessors, (209), 10 states have call successors, (38), 9 states have call predecessors, (38), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) Word has length 137 [2024-11-09 07:03:19,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:03:19,518 INFO L225 Difference]: With dead ends: 46662 [2024-11-09 07:03:19,518 INFO L226 Difference]: Without dead ends: 32656 [2024-11-09 07:03:19,566 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 341 SyntacticMatches, 39 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=960, Invalid=7412, Unknown=0, NotChecked=0, Total=8372 [2024-11-09 07:03:19,566 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 2688 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2688 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 07:03:19,567 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2688 Valid, 760 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 07:03:19,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32656 states. [2024-11-09 07:03:21,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32656 to 30362. [2024-11-09 07:03:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30362 states, 26541 states have (on average 1.421611845823443) internal successors, (37731), 26614 states have internal predecessors, (37731), 2308 states have call successors, (2308), 1512 states have call predecessors, (2308), 1512 states have return successors, (2308), 2236 states have call predecessors, (2308), 2308 states have call successors, (2308) [2024-11-09 07:03:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30362 states to 30362 states and 42347 transitions. [2024-11-09 07:03:21,363 INFO L78 Accepts]: Start accepts. Automaton has 30362 states and 42347 transitions. Word has length 137 [2024-11-09 07:03:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:03:21,364 INFO L471 AbstractCegarLoop]: Abstraction has 30362 states and 42347 transitions. [2024-11-09 07:03:21,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 14.928571428571429) internal successors, (209), 16 states have internal predecessors, (209), 10 states have call successors, (38), 9 states have call predecessors, (38), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-09 07:03:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 30362 states and 42347 transitions. [2024-11-09 07:03:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 07:03:21,428 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:03:21,428 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, 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] [2024-11-09 07:03:21,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 07:03:21,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:03:21,632 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:03:21,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:03:21,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1932172482, now seen corresponding path program 1 times [2024-11-09 07:03:21,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:03:21,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409000418] [2024-11-09 07:03:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:03:21,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:03:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:03:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 07:03:21,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:03:21,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409000418] [2024-11-09 07:03:21,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409000418] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:03:21,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006471885] [2024-11-09 07:03:21,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:03:21,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:03:21,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:03:21,921 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:03:21,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 07:03:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:03:22,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 07:03:22,106 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:03:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 07:03:22,161 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:03:22,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006471885] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:03:22,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:03:22,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 07:03:22,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684725405] [2024-11-09 07:03:22,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:03:22,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:03:22,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:03:22,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:03:22,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:03:22,166 INFO L87 Difference]: Start difference. First operand 30362 states and 42347 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:03:24,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:03:24,089 INFO L93 Difference]: Finished difference Result 52287 states and 73865 transitions. [2024-11-09 07:03:24,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:03:24,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2024-11-09 07:03:24,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:03:24,221 INFO L225 Difference]: With dead ends: 52287 [2024-11-09 07:03:24,222 INFO L226 Difference]: Without dead ends: 30412 [2024-11-09 07:03:24,266 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:03:24,267 INFO L432 NwaCegarLoop]: 222 mSDtfsCounter, 130 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:03:24,267 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 350 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:03:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30412 states. [2024-11-09 07:03:25,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30412 to 30134. [2024-11-09 07:03:25,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30134 states, 26313 states have (on average 1.4074791927944361) internal successors, (37035), 26386 states have internal predecessors, (37035), 2308 states have call successors, (2308), 1512 states have call predecessors, (2308), 1512 states have return successors, (2308), 2236 states have call predecessors, (2308), 2308 states have call successors, (2308) [2024-11-09 07:03:25,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30134 states to 30134 states and 41651 transitions. [2024-11-09 07:03:25,952 INFO L78 Accepts]: Start accepts. Automaton has 30134 states and 41651 transitions. Word has length 134 [2024-11-09 07:03:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:03:25,953 INFO L471 AbstractCegarLoop]: Abstraction has 30134 states and 41651 transitions. [2024-11-09 07:03:25,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:03:25,953 INFO L276 IsEmpty]: Start isEmpty. Operand 30134 states and 41651 transitions. [2024-11-09 07:03:26,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 07:03:26,008 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:03:26,008 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, 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] [2024-11-09 07:03:26,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 07:03:26,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 07:03:26,209 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:03:26,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:03:26,210 INFO L85 PathProgramCache]: Analyzing trace with hash 99905980, now seen corresponding path program 1 times [2024-11-09 07:03:26,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:03:26,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303242851] [2024-11-09 07:03:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:03:26,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:03:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:03:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 07:03:26,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:03:26,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303242851] [2024-11-09 07:03:26,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303242851] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:03:26,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592568808] [2024-11-09 07:03:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:03:26,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:03:26,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:03:26,435 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:03:26,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 07:03:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:03:26,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:03:26,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:03:26,615 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 07:03:26,615 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:03:26,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592568808] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:03:26,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:03:26,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 07:03:26,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001059228] [2024-11-09 07:03:26,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:03:26,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:03:26,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:03:26,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:03:26,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:03:26,618 INFO L87 Difference]: Start difference. First operand 30134 states and 41651 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 07:03:28,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:03:28,409 INFO L93 Difference]: Finished difference Result 53800 states and 74190 transitions. [2024-11-09 07:03:28,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:03:28,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 134 [2024-11-09 07:03:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:03:28,530 INFO L225 Difference]: With dead ends: 53800 [2024-11-09 07:03:28,531 INFO L226 Difference]: Without dead ends: 33866 [2024-11-09 07:03:28,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:03:28,577 INFO L432 NwaCegarLoop]: 153 mSDtfsCounter, 141 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:03:28,577 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 186 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:03:28,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33866 states. [2024-11-09 07:03:30,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33866 to 33866. [2024-11-09 07:03:30,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33866 states, 29653 states have (on average 1.3793882575118874) internal successors, (40903), 29726 states have internal predecessors, (40903), 2432 states have call successors, (2432), 1780 states have call predecessors, (2432), 1780 states have return successors, (2432), 2360 states have call predecessors, (2432), 2432 states have call successors, (2432) [2024-11-09 07:03:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33866 states to 33866 states and 45767 transitions. [2024-11-09 07:03:30,392 INFO L78 Accepts]: Start accepts. Automaton has 33866 states and 45767 transitions. Word has length 134 [2024-11-09 07:03:30,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:03:30,393 INFO L471 AbstractCegarLoop]: Abstraction has 33866 states and 45767 transitions. [2024-11-09 07:03:30,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 07:03:30,394 INFO L276 IsEmpty]: Start isEmpty. Operand 33866 states and 45767 transitions. [2024-11-09 07:03:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-09 07:03:30,455 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:03:30,456 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, 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] [2024-11-09 07:03:30,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 07:03:30,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 07:03:30,658 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:03:30,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:03:30,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1092735349, now seen corresponding path program 1 times [2024-11-09 07:03:30,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:03:30,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474672267] [2024-11-09 07:03:30,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:03:30,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:03:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:03:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 07:03:30,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:03:30,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474672267] [2024-11-09 07:03:30,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474672267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:03:30,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794553149] [2024-11-09 07:03:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:03:30,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:03:30,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:03:30,989 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:03:30,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 07:03:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:03:31,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 07:03:31,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:03:31,195 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 07:03:31,195 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:03:31,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794553149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:03:31,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:03:31,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 07:03:31,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894912786] [2024-11-09 07:03:31,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:03:31,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:03:31,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:03:31,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:03:31,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:03:31,199 INFO L87 Difference]: Start difference. First operand 33866 states and 45767 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 07:03:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:03:33,400 INFO L93 Difference]: Finished difference Result 83186 states and 113768 transitions. [2024-11-09 07:03:33,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:03:33,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 135 [2024-11-09 07:03:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:03:33,596 INFO L225 Difference]: With dead ends: 83186 [2024-11-09 07:03:33,597 INFO L226 Difference]: Without dead ends: 49326 [2024-11-09 07:03:33,656 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 07:03:33,656 INFO L432 NwaCegarLoop]: 151 mSDtfsCounter, 72 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:03:33,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 277 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:03:33,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49326 states. [2024-11-09 07:03:35,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49326 to 40192. [2024-11-09 07:03:35,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40192 states, 35543 states have (on average 1.3970402048223278) internal successors, (49655), 35617 states have internal predecessors, (49655), 2650 states have call successors, (2650), 1998 states have call predecessors, (2650), 1998 states have return successors, (2650), 2577 states have call predecessors, (2650), 2650 states have call successors, (2650) [2024-11-09 07:03:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40192 states to 40192 states and 54955 transitions. [2024-11-09 07:03:36,102 INFO L78 Accepts]: Start accepts. Automaton has 40192 states and 54955 transitions. Word has length 135 [2024-11-09 07:03:36,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:03:36,104 INFO L471 AbstractCegarLoop]: Abstraction has 40192 states and 54955 transitions. [2024-11-09 07:03:36,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 07:03:36,104 INFO L276 IsEmpty]: Start isEmpty. Operand 40192 states and 54955 transitions. [2024-11-09 07:03:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-09 07:03:36,160 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:03:36,160 INFO L215 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 07:03:36,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 07:03:36,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 07:03:36,361 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:03:36,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:03:36,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1330905384, now seen corresponding path program 1 times [2024-11-09 07:03:36,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:03:36,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312811442] [2024-11-09 07:03:36,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:03:36,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:03:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:03:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-09 07:03:36,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:03:36,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312811442] [2024-11-09 07:03:36,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312811442] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:03:36,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087375530] [2024-11-09 07:03:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:03:36,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:03:36,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:03:36,763 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:03:36,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 07:03:36,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:03:36,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 07:03:36,943 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:03:37,060 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 07:03:37,061 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:03:37,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087375530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:03:37,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:03:37,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 07:03:37,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341470162] [2024-11-09 07:03:37,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:03:37,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 07:03:37,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:03:37,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 07:03:37,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 07:03:37,063 INFO L87 Difference]: Start difference. First operand 40192 states and 54955 transitions. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 07:03:39,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:03:39,811 INFO L93 Difference]: Finished difference Result 64956 states and 88886 transitions. [2024-11-09 07:03:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 07:03:39,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 140 [2024-11-09 07:03:39,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:03:39,953 INFO L225 Difference]: With dead ends: 64956 [2024-11-09 07:03:39,954 INFO L226 Difference]: Without dead ends: 44608 [2024-11-09 07:03:39,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 07:03:39,992 INFO L432 NwaCegarLoop]: 220 mSDtfsCounter, 114 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 07:03:39,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 637 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 07:03:40,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44608 states. [2024-11-09 07:03:41,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44608 to 41476. [2024-11-09 07:03:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41476 states, 36307 states have (on average 1.392321040019831) internal successors, (50551), 36417 states have internal predecessors, (50551), 2994 states have call successors, (2994), 2174 states have call predecessors, (2994), 2174 states have return successors, (2994), 2885 states have call predecessors, (2994), 2994 states have call successors, (2994) [2024-11-09 07:03:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41476 states to 41476 states and 56539 transitions. [2024-11-09 07:03:42,134 INFO L78 Accepts]: Start accepts. Automaton has 41476 states and 56539 transitions. Word has length 140 [2024-11-09 07:03:42,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:03:42,134 INFO L471 AbstractCegarLoop]: Abstraction has 41476 states and 56539 transitions. [2024-11-09 07:03:42,134 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2024-11-09 07:03:42,134 INFO L276 IsEmpty]: Start isEmpty. Operand 41476 states and 56539 transitions. [2024-11-09 07:03:42,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-09 07:03:42,191 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:03:42,191 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, 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] [2024-11-09 07:03:42,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 07:03:42,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 07:03:42,392 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:03:42,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:03:42,392 INFO L85 PathProgramCache]: Analyzing trace with hash 10526855, now seen corresponding path program 1 times [2024-11-09 07:03:42,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:03:42,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083970672] [2024-11-09 07:03:42,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:03:42,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:03:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:03:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-11-09 07:03:42,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:03:42,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083970672] [2024-11-09 07:03:42,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083970672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:03:42,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647848636] [2024-11-09 07:03:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:03:42,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:03:42,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:03:42,522 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:03:42,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 07:03:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:03:42,678 INFO L255 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 07:03:42,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:03:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 07:03:42,712 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:03:42,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647848636] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:03:42,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:03:42,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 07:03:42,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592974676] [2024-11-09 07:03:42,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:03:42,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 07:03:42,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:03:42,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 07:03:42,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:03:42,714 INFO L87 Difference]: Start difference. First operand 41476 states and 56539 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:03:46,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 07:03:46,069 INFO L93 Difference]: Finished difference Result 96632 states and 132433 transitions. [2024-11-09 07:03:46,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 07:03:46,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 137 [2024-11-09 07:03:46,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 07:03:46,291 INFO L225 Difference]: With dead ends: 96632 [2024-11-09 07:03:46,292 INFO L226 Difference]: Without dead ends: 65588 [2024-11-09 07:03:46,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 07:03:46,349 INFO L432 NwaCegarLoop]: 230 mSDtfsCounter, 96 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 07:03:46,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 372 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 07:03:46,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65588 states. [2024-11-09 07:03:50,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65588 to 58534. [2024-11-09 07:03:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58534 states, 52069 states have (on average 1.4025043692024044) internal successors, (73027), 52179 states have internal predecessors, (73027), 3642 states have call successors, (3642), 2822 states have call predecessors, (3642), 2822 states have return successors, (3642), 3533 states have call predecessors, (3642), 3642 states have call successors, (3642) [2024-11-09 07:03:50,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58534 states to 58534 states and 80311 transitions. [2024-11-09 07:03:50,509 INFO L78 Accepts]: Start accepts. Automaton has 58534 states and 80311 transitions. Word has length 137 [2024-11-09 07:03:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 07:03:50,509 INFO L471 AbstractCegarLoop]: Abstraction has 58534 states and 80311 transitions. [2024-11-09 07:03:50,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 07:03:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 58534 states and 80311 transitions. [2024-11-09 07:03:50,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-09 07:03:50,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 07:03:50,596 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, 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] [2024-11-09 07:03:50,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 07:03:50,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 07:03:50,798 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 07:03:50,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 07:03:50,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2141643446, now seen corresponding path program 1 times [2024-11-09 07:03:50,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 07:03:50,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17433944] [2024-11-09 07:03:50,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:03:50,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 07:03:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:03:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-09 07:03:51,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 07:03:51,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17433944] [2024-11-09 07:03:51,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17433944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 07:03:51,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227283289] [2024-11-09 07:03:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 07:03:51,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 07:03:51,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 07:03:51,125 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 07:03:51,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1dbb473-c2d6-47ce-8945-3e2e1509bdc8/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 07:03:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 07:03:51,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 07:03:51,329 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 07:03:51,532 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-09 07:03:51,533 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 07:03:51,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227283289] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 07:03:51,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 07:03:51,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-09 07:03:51,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681271976] [2024-11-09 07:03:51,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 07:03:51,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 07:03:51,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 07:03:51,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 07:03:51,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-09 07:03:51,536 INFO L87 Difference]: Start difference. First operand 58534 states and 80311 transitions. Second operand has 6 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10)