./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+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_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/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_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/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_9bf4800d-73ad-4103-b837-36ce30632d33/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 397165505e22c94185c98ac889a4a39846b9e873d477057714c221ff936752e7 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:32:35,320 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:32:35,424 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:32:35,430 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:32:35,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:32:35,467 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:32:35,467 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:32:35,468 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:32:35,468 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:32:35,468 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:32:35,469 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:32:35,469 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:32:35,470 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:32:35,471 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:32:35,472 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:32:35,472 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:32:35,472 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:32:35,473 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:32:35,473 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:32:35,473 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:32:35,474 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:32:35,479 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:32:35,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:32:35,480 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:32:35,480 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:32:35,480 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:32:35,481 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:32:35,481 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:32:35,481 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:32:35,481 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:32:35,482 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:32:35,482 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:32:35,482 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:32:35,485 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:32:35,485 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:32:35,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:32:35,486 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:32:35,486 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:32:35,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:32:35,486 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:32:35,487 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:32:35,487 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:32:35,487 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:32:35,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:32:35,488 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:32:35,488 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:32:35,488 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:32:35,488 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_9bf4800d-73ad-4103-b837-36ce30632d33/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 397165505e22c94185c98ac889a4a39846b9e873d477057714c221ff936752e7 [2024-11-09 06:32:35,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:32:35,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:32:35,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:32:35,785 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:32:35,785 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:32:35,786 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.c Unable to find full path for "g++" [2024-11-09 06:32:37,846 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:32:38,537 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:32:38,540 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.c [2024-11-09 06:32:38,591 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/data/66b2797b5/0ca1dd0d2ba94bec87db797565e6228b/FLAGd0c160fbf [2024-11-09 06:32:38,612 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/data/66b2797b5/0ca1dd0d2ba94bec87db797565e6228b [2024-11-09 06:32:38,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:32:38,619 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:32:38,620 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:32:38,621 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:32:38,627 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:32:38,628 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:32:38" (1/1) ... [2024-11-09 06:32:38,629 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2937b4de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:32:38, skipping insertion in model container [2024-11-09 06:32:38,631 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:32:38" (1/1) ... [2024-11-09 06:32:38,880 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:32:41,036 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_9bf4800d-73ad-4103-b837-36ce30632d33/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.c[381679,381692] [2024-11-09 06:32:41,074 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_9bf4800d-73ad-4103-b837-36ce30632d33/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.c[383339,383352] [2024-11-09 06:32:41,298 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:32:41,311 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:32:42,651 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_9bf4800d-73ad-4103-b837-36ce30632d33/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.c[381679,381692] [2024-11-09 06:32:42,656 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_9bf4800d-73ad-4103-b837-36ce30632d33/sv-benchmarks/c/combinations/Problem05_label43+token_ring.05.cil-1.c[383339,383352] [2024-11-09 06:32:42,691 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:32:42,759 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:32:42,759 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:32:42 WrapperNode [2024-11-09 06:32:42,760 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:32:42,761 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:32:42,761 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:32:42,761 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:32:42,766 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:32:42" (1/1) ... [2024-11-09 06:32:42,856 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:32:42" (1/1) ... [2024-11-09 06:32:43,279 INFO L138 Inliner]: procedures = 54, calls = 56, calls flagged for inlining = 32, calls inlined = 32, statements flattened = 12804 [2024-11-09 06:32:43,280 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:32:43,280 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:32:43,280 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:32:43,280 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:32:43,291 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:32:42" (1/1) ... [2024-11-09 06:32:43,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:32:42" (1/1) ... [2024-11-09 06:32:43,362 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:32:42" (1/1) ... [2024-11-09 06:32:43,362 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:32:42" (1/1) ... [2024-11-09 06:32:43,570 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:32:42" (1/1) ... [2024-11-09 06:32:43,628 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:32:42" (1/1) ... [2024-11-09 06:32:43,676 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:32:42" (1/1) ... [2024-11-09 06:32:43,712 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:32:42" (1/1) ... [2024-11-09 06:32:43,800 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:32:43,804 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:32:43,805 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:32:43,805 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:32:43,806 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:32:42" (1/1) ... [2024-11-09 06:32:43,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:32:43,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:32:43,861 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:32:43,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:32:43,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:32:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-09 06:32:43,933 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-09 06:32:43,933 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 06:32:43,933 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 06:32:43,940 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-09 06:32:43,941 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-09 06:32:43,941 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-09 06:32:43,941 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-09 06:32:43,941 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-09 06:32:43,941 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-09 06:32:43,941 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-09 06:32:43,942 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-09 06:32:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:32:43,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:32:43,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:32:44,191 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:32:44,198 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:32:54,350 INFO L? ?]: Removed 1713 outVars from TransFormulas that were not future-live. [2024-11-09 06:32:54,351 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:32:56,901 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:32:56,903 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-09 06:32:56,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:32:56 BoogieIcfgContainer [2024-11-09 06:32:56,904 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:32:56,906 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:32:56,906 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:32:56,912 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:32:56,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:32:38" (1/3) ... [2024-11-09 06:32:56,913 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c8fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:32:56, skipping insertion in model container [2024-11-09 06:32:56,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:32:42" (2/3) ... [2024-11-09 06:32:56,915 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25c8fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:32:56, skipping insertion in model container [2024-11-09 06:32:56,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:32:56" (3/3) ... [2024-11-09 06:32:56,916 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.05.cil-1.c [2024-11-09 06:32:56,936 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:32:56,937 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 06:32:57,074 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:32:57,080 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;@3fe1efc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:32:57,081 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 06:32:57,092 INFO L276 IsEmpty]: Start isEmpty. Operand has 1760 states, 1732 states have (on average 1.9670900692840647) internal successors, (3407), 1735 states have internal predecessors, (3407), 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 06:32:57,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 06:32:57,103 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:32:57,104 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:32:57,104 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:32:57,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:32:57,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1897856591, now seen corresponding path program 1 times [2024-11-09 06:32:57,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:32:57,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307609401] [2024-11-09 06:32:57,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:32:57,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:32:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:32:57,554 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 06:32:57,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:32:57,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307609401] [2024-11-09 06:32:57,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307609401] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:32:57,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:32:57,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:32:57,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165811135] [2024-11-09 06:32:57,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:32:57,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:32:57,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:32:57,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:32:57,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:32:57,598 INFO L87 Difference]: Start difference. First operand has 1760 states, 1732 states have (on average 1.9670900692840647) internal successors, (3407), 1735 states have internal predecessors, (3407), 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 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 06:32:58,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:32:58,588 INFO L93 Difference]: Finished difference Result 3620 states and 7053 transitions. [2024-11-09 06:32:58,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:32:58,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 46 [2024-11-09 06:32:58,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:32:58,611 INFO L225 Difference]: With dead ends: 3620 [2024-11-09 06:32:58,611 INFO L226 Difference]: Without dead ends: 1859 [2024-11-09 06:32:58,618 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 06:32:58,622 INFO L432 NwaCegarLoop]: 3313 mSDtfsCounter, 3560 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3560 SdHoareTripleChecker+Valid, 6556 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:32:58,623 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3560 Valid, 6556 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:32:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2024-11-09 06:32:58,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1858. [2024-11-09 06:32:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1810 states have (on average 1.938121546961326) internal successors, (3508), 1813 states have internal predecessors, (3508), 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 06:32:58,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 3576 transitions. [2024-11-09 06:32:58,766 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 3576 transitions. Word has length 46 [2024-11-09 06:32:58,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:32:58,767 INFO L471 AbstractCegarLoop]: Abstraction has 1858 states and 3576 transitions. [2024-11-09 06:32:58,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 06:32:58,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 3576 transitions. [2024-11-09 06:32:58,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 06:32:58,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:32:58,772 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, 1] [2024-11-09 06:32:58,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:32:58,776 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:32:58,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:32:58,776 INFO L85 PathProgramCache]: Analyzing trace with hash 232267218, now seen corresponding path program 1 times [2024-11-09 06:32:58,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:32:58,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284793450] [2024-11-09 06:32:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:32:58,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:32:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:32:59,039 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 06:32:59,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:32:59,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284793450] [2024-11-09 06:32:59,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284793450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:32:59,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717199083] [2024-11-09 06:32:59,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:32:59,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:32:59,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:32:59,046 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:32:59,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:32:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:32:59,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:32:59,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:32:59,310 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 06:32:59,311 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:32:59,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717199083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:32:59,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:32:59,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:32:59,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757717615] [2024-11-09 06:32:59,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:32:59,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:32:59,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:32:59,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:32:59,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:32:59,315 INFO L87 Difference]: Start difference. First operand 1858 states and 3576 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 06:32:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:32:59,884 INFO L93 Difference]: Finished difference Result 2275 states and 4181 transitions. [2024-11-09 06:32:59,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:32:59,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 88 [2024-11-09 06:32:59,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:32:59,901 INFO L225 Difference]: With dead ends: 2275 [2024-11-09 06:32:59,901 INFO L226 Difference]: Without dead ends: 2063 [2024-11-09 06:32:59,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 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 06:32:59,905 INFO L432 NwaCegarLoop]: 3229 mSDtfsCounter, 3405 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3405 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:32:59,906 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3405 Valid, 3355 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:32:59,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2024-11-09 06:32:59,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 2059. [2024-11-09 06:32:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2059 states, 1971 states have (on average 1.8939624556062913) internal successors, (3733), 1975 states have internal predecessors, (3733), 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 06:32:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2059 states to 2059 states and 3857 transitions. [2024-11-09 06:32:59,996 INFO L78 Accepts]: Start accepts. Automaton has 2059 states and 3857 transitions. Word has length 88 [2024-11-09 06:32:59,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:32:59,997 INFO L471 AbstractCegarLoop]: Abstraction has 2059 states and 3857 transitions. [2024-11-09 06:32:59,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 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 06:32:59,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2059 states and 3857 transitions. [2024-11-09 06:33:00,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 06:33:00,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:33:00,005 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, 1] [2024-11-09 06:33:00,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 06:33:00,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:33:00,206 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:33:00,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:33:00,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1305912432, now seen corresponding path program 1 times [2024-11-09 06:33:00,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:33:00,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745699401] [2024-11-09 06:33:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:00,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:33:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:00,413 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 06:33:00,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:33:00,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745699401] [2024-11-09 06:33:00,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745699401] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:33:00,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597535020] [2024-11-09 06:33:00,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:00,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:33:00,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:33:00,417 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:33:00,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:33:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:00,568 INFO L255 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:33:00,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:33:00,652 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 06:33:00,652 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:33:00,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597535020] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:33:00,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:33:00,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:33:00,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591259910] [2024-11-09 06:33:00,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:33:00,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:33:00,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:33:00,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:33:00,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:33:00,655 INFO L87 Difference]: Start difference. First operand 2059 states and 3857 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 06:33:01,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:33:01,201 INFO L93 Difference]: Finished difference Result 2872 states and 5028 transitions. [2024-11-09 06:33:01,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:33:01,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 88 [2024-11-09 06:33:01,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:33:01,219 INFO L225 Difference]: With dead ends: 2872 [2024-11-09 06:33:01,219 INFO L226 Difference]: Without dead ends: 2459 [2024-11-09 06:33:01,223 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 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 06:33:01,226 INFO L432 NwaCegarLoop]: 3190 mSDtfsCounter, 3399 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3399 SdHoareTripleChecker+Valid, 3316 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:33:01,227 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3399 Valid, 3316 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:33:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2024-11-09 06:33:01,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 2453. [2024-11-09 06:33:01,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2287 states have (on average 1.8237866200262352) internal successors, (4171), 2293 states have internal predecessors, (4171), 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 06:33:01,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 4403 transitions. [2024-11-09 06:33:01,334 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 4403 transitions. Word has length 88 [2024-11-09 06:33:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:33:01,336 INFO L471 AbstractCegarLoop]: Abstraction has 2453 states and 4403 transitions. [2024-11-09 06:33:01,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 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 06:33:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 4403 transitions. [2024-11-09 06:33:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 06:33:01,344 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:33:01,344 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, 1] [2024-11-09 06:33:01,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:33:01,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-09 06:33:01,545 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:33:01,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:33:01,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1152597966, now seen corresponding path program 1 times [2024-11-09 06:33:01,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:33:01,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153434541] [2024-11-09 06:33:01,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:01,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:33:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:01,805 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 06:33:01,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:33:01,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153434541] [2024-11-09 06:33:01,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153434541] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:33:01,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883025566] [2024-11-09 06:33:01,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:01,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:33:01,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:33:01,809 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:33:01,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:33:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:01,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:33:01,969 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:33:02,011 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 06:33:02,011 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:33:02,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883025566] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:33:02,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:33:02,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:33:02,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255287330] [2024-11-09 06:33:02,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:33:02,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:33:02,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:33:02,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:33:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:33:02,014 INFO L87 Difference]: Start difference. First operand 2453 states and 4403 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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 06:33:02,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:33:02,621 INFO L93 Difference]: Finished difference Result 4042 states and 6672 transitions. [2024-11-09 06:33:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:33:02,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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 88 [2024-11-09 06:33:02,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:33:02,639 INFO L225 Difference]: With dead ends: 4042 [2024-11-09 06:33:02,640 INFO L226 Difference]: Without dead ends: 3235 [2024-11-09 06:33:02,645 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 88 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 06:33:02,646 INFO L432 NwaCegarLoop]: 3190 mSDtfsCounter, 3408 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3408 SdHoareTripleChecker+Valid, 3316 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:33:02,647 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3408 Valid, 3316 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:33:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3235 states. [2024-11-09 06:33:02,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3235 to 3225. [2024-11-09 06:33:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 2907 states have (on average 1.7278981768145856) internal successors, (5023), 2917 states have internal predecessors, (5023), 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 06:33:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 5463 transitions. [2024-11-09 06:33:02,880 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 5463 transitions. Word has length 88 [2024-11-09 06:33:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:33:02,881 INFO L471 AbstractCegarLoop]: Abstraction has 3225 states and 5463 transitions. [2024-11-09 06:33:02,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 2 states have internal predecessors, (55), 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 06:33:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 5463 transitions. [2024-11-09 06:33:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-09 06:33:02,889 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:33:02,889 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, 1] [2024-11-09 06:33:02,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 06:33:03,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:33:03,090 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:33:03,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:33:03,091 INFO L85 PathProgramCache]: Analyzing trace with hash 248725840, now seen corresponding path program 1 times [2024-11-09 06:33:03,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:33:03,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907741202] [2024-11-09 06:33:03,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:03,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:33:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:03,227 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 06:33:03,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:33:03,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907741202] [2024-11-09 06:33:03,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907741202] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:33:03,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:33:03,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:33:03,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894039022] [2024-11-09 06:33:03,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:33:03,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:33:03,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:33:03,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:33:03,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:33:03,231 INFO L87 Difference]: Start difference. First operand 3225 states and 5463 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 06:33:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:33:03,939 INFO L93 Difference]: Finished difference Result 4475 states and 7240 transitions. [2024-11-09 06:33:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:33:03,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 88 [2024-11-09 06:33:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:33:03,961 INFO L225 Difference]: With dead ends: 4475 [2024-11-09 06:33:03,961 INFO L226 Difference]: Without dead ends: 3665 [2024-11-09 06:33:03,966 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 06:33:03,967 INFO L432 NwaCegarLoop]: 3264 mSDtfsCounter, 69 mSDsluCounter, 3196 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 6460 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:33:03,967 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 6460 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:33:03,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3665 states. [2024-11-09 06:33:04,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3665 to 3517. [2024-11-09 06:33:04,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3517 states, 3183 states have (on average 1.7137920201068175) internal successors, (5455), 3193 states have internal predecessors, (5455), 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 06:33:04,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3517 states to 3517 states and 5911 transitions. [2024-11-09 06:33:04,155 INFO L78 Accepts]: Start accepts. Automaton has 3517 states and 5911 transitions. Word has length 88 [2024-11-09 06:33:04,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:33:04,156 INFO L471 AbstractCegarLoop]: Abstraction has 3517 states and 5911 transitions. [2024-11-09 06:33:04,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 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 06:33:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 3517 states and 5911 transitions. [2024-11-09 06:33:04,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-09 06:33:04,167 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:33:04,168 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, 1] [2024-11-09 06:33:04,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 06:33:04,168 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:33:04,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:33:04,169 INFO L85 PathProgramCache]: Analyzing trace with hash -713507490, now seen corresponding path program 1 times [2024-11-09 06:33:04,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:33:04,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629076267] [2024-11-09 06:33:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:04,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:33:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:04,332 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 06:33:04,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:33:04,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629076267] [2024-11-09 06:33:04,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629076267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:33:04,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:33:04,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:33:04,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471061887] [2024-11-09 06:33:04,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:33:04,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:33:04,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:33:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:33:04,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:33:04,337 INFO L87 Difference]: Start difference. First operand 3517 states and 5911 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 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 06:33:05,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:33:05,002 INFO L93 Difference]: Finished difference Result 7186 states and 11156 transitions. [2024-11-09 06:33:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:33:05,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 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 118 [2024-11-09 06:33:05,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:33:05,033 INFO L225 Difference]: With dead ends: 7186 [2024-11-09 06:33:05,033 INFO L226 Difference]: Without dead ends: 5315 [2024-11-09 06:33:05,042 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 06:33:05,043 INFO L432 NwaCegarLoop]: 3192 mSDtfsCounter, 3398 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3398 SdHoareTripleChecker+Valid, 3318 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:33:05,043 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3398 Valid, 3318 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:33:05,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5315 states. [2024-11-09 06:33:05,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5315 to 5289. [2024-11-09 06:33:05,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5289 states, 4643 states have (on average 1.6108119750161534) internal successors, (7479), 4661 states have internal predecessors, (7479), 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 06:33:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5289 states to 5289 states and 8351 transitions. [2024-11-09 06:33:05,351 INFO L78 Accepts]: Start accepts. Automaton has 5289 states and 8351 transitions. Word has length 118 [2024-11-09 06:33:05,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:33:05,353 INFO L471 AbstractCegarLoop]: Abstraction has 5289 states and 8351 transitions. [2024-11-09 06:33:05,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 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 06:33:05,354 INFO L276 IsEmpty]: Start isEmpty. Operand 5289 states and 8351 transitions. [2024-11-09 06:33:05,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-09 06:33:05,366 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:33:05,367 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, 1] [2024-11-09 06:33:05,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 06:33:05,367 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:33:05,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:33:05,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1653129722, now seen corresponding path program 1 times [2024-11-09 06:33:05,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:33:05,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548557289] [2024-11-09 06:33:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:05,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:33:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:05,496 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 06:33:05,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:33:05,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548557289] [2024-11-09 06:33:05,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548557289] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:33:05,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:33:05,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:33:05,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740035806] [2024-11-09 06:33:05,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:33:05,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:33:05,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:33:05,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:33:05,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:33:05,500 INFO L87 Difference]: Start difference. First operand 5289 states and 8351 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 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 06:33:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:33:06,407 INFO L93 Difference]: Finished difference Result 12430 states and 18436 transitions. [2024-11-09 06:33:06,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:33:06,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 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 118 [2024-11-09 06:33:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:33:06,471 INFO L225 Difference]: With dead ends: 12430 [2024-11-09 06:33:06,471 INFO L226 Difference]: Without dead ends: 8787 [2024-11-09 06:33:06,482 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 06:33:06,483 INFO L432 NwaCegarLoop]: 3210 mSDtfsCounter, 3401 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 3336 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:33:06,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3401 Valid, 3336 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:33:06,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8787 states. [2024-11-09 06:33:06,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8787 to 8737. [2024-11-09 06:33:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8737 states, 7483 states have (on average 1.5190431645062141) internal successors, (11367), 7517 states have internal predecessors, (11367), 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 06:33:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8737 states to 8737 states and 13039 transitions. [2024-11-09 06:33:06,867 INFO L78 Accepts]: Start accepts. Automaton has 8737 states and 13039 transitions. Word has length 118 [2024-11-09 06:33:06,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:33:06,868 INFO L471 AbstractCegarLoop]: Abstraction has 8737 states and 13039 transitions. [2024-11-09 06:33:06,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (9), 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 06:33:06,868 INFO L276 IsEmpty]: Start isEmpty. Operand 8737 states and 13039 transitions. [2024-11-09 06:33:06,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 06:33:06,893 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:33:06,893 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, 1] [2024-11-09 06:33:06,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 06:33:06,893 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:33:06,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:33:06,894 INFO L85 PathProgramCache]: Analyzing trace with hash 699161955, now seen corresponding path program 1 times [2024-11-09 06:33:06,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:33:06,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486593157] [2024-11-09 06:33:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:06,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:33:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:07,058 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 06:33:07,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:33:07,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486593157] [2024-11-09 06:33:07,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486593157] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:33:07,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231578478] [2024-11-09 06:33:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:07,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:33:07,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:33:07,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:33:07,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:33:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:07,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:33:07,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:33:07,283 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 06:33:07,283 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:33:07,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231578478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:33:07,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:33:07,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 06:33:07,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624730694] [2024-11-09 06:33:07,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:33:07,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:33:07,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:33:07,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:33:07,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:33:07,286 INFO L87 Difference]: Start difference. First operand 8737 states and 13039 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 06:33:08,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:33:08,079 INFO L93 Difference]: Finished difference Result 14693 states and 21489 transitions. [2024-11-09 06:33:08,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:33:08,079 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 06:33:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:33:08,135 INFO L225 Difference]: With dead ends: 14693 [2024-11-09 06:33:08,135 INFO L226 Difference]: Without dead ends: 11051 [2024-11-09 06:33:08,149 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 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 06:33:08,150 INFO L432 NwaCegarLoop]: 3260 mSDtfsCounter, 76 mSDsluCounter, 3195 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 6455 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:33:08,150 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 6455 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:33:08,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11051 states. [2024-11-09 06:33:08,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11051 to 10265. [2024-11-09 06:33:08,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10265 states, 8915 states have (on average 1.5209197980931015) internal successors, (13559), 8949 states have internal predecessors, (13559), 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 06:33:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10265 states to 10265 states and 15327 transitions. [2024-11-09 06:33:08,850 INFO L78 Accepts]: Start accepts. Automaton has 10265 states and 15327 transitions. Word has length 134 [2024-11-09 06:33:08,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:33:08,851 INFO L471 AbstractCegarLoop]: Abstraction has 10265 states and 15327 transitions. [2024-11-09 06:33:08,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 06:33:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 10265 states and 15327 transitions. [2024-11-09 06:33:08,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 06:33:08,878 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:33:08,878 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, 1] [2024-11-09 06:33:08,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 06:33:09,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 06:33:09,083 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:33:09,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:33:09,084 INFO L85 PathProgramCache]: Analyzing trace with hash -443426292, now seen corresponding path program 1 times [2024-11-09 06:33:09,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:33:09,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343244146] [2024-11-09 06:33:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:09,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:33:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:09,262 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 06:33:09,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:33:09,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343244146] [2024-11-09 06:33:09,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343244146] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:33:09,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975435438] [2024-11-09 06:33:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:09,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:33:09,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:33:09,265 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:33:09,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:33:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:09,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:33:09,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:33:09,470 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 06:33:09,470 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:33:09,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975435438] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:33:09,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:33:09,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 06:33:09,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801435989] [2024-11-09 06:33:09,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:33:09,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:33:09,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:33:09,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:33:09,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:33:09,473 INFO L87 Difference]: Start difference. First operand 10265 states and 15327 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 06:33:10,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:33:10,487 INFO L93 Difference]: Finished difference Result 17853 states and 26137 transitions. [2024-11-09 06:33:10,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:33:10,488 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 06:33:10,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:33:10,546 INFO L225 Difference]: With dead ends: 17853 [2024-11-09 06:33:10,546 INFO L226 Difference]: Without dead ends: 13459 [2024-11-09 06:33:10,558 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 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 06:33:10,560 INFO L432 NwaCegarLoop]: 3282 mSDtfsCounter, 88 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 6479 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:33:10,560 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 6479 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:33:10,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13459 states. [2024-11-09 06:33:11,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13459 to 12449. [2024-11-09 06:33:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12449 states, 10955 states have (on average 1.5181195801004108) internal successors, (16631), 10989 states have internal predecessors, (16631), 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 06:33:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12449 states to 12449 states and 18543 transitions. [2024-11-09 06:33:11,073 INFO L78 Accepts]: Start accepts. Automaton has 12449 states and 18543 transitions. Word has length 134 [2024-11-09 06:33:11,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:33:11,074 INFO L471 AbstractCegarLoop]: Abstraction has 12449 states and 18543 transitions. [2024-11-09 06:33:11,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 06:33:11,074 INFO L276 IsEmpty]: Start isEmpty. Operand 12449 states and 18543 transitions. [2024-11-09 06:33:11,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-09 06:33:11,103 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:33:11,103 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, 1] [2024-11-09 06:33:11,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 06:33:11,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:33:11,304 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:33:11,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:33:11,305 INFO L85 PathProgramCache]: Analyzing trace with hash 106135509, now seen corresponding path program 1 times [2024-11-09 06:33:11,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:33:11,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061381288] [2024-11-09 06:33:11,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:11,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:33:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:11,485 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 06:33:11,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:33:11,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061381288] [2024-11-09 06:33:11,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061381288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:33:11,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457625485] [2024-11-09 06:33:11,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:11,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:33:11,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:33:11,488 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:33:11,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:33:11,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:11,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:33:11,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:33:11,686 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 06:33:11,686 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:33:11,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457625485] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:33:11,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:33:11,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 06:33:11,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166418093] [2024-11-09 06:33:11,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:33:11,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:33:11,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:33:11,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:33:11,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:33:11,688 INFO L87 Difference]: Start difference. First operand 12449 states and 18543 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 06:33:12,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:33:12,587 INFO L93 Difference]: Finished difference Result 22333 states and 32749 transitions. [2024-11-09 06:33:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:33:12,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 06:33:12,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:33:12,653 INFO L225 Difference]: With dead ends: 22333 [2024-11-09 06:33:12,653 INFO L226 Difference]: Without dead ends: 16775 [2024-11-09 06:33:12,672 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 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 06:33:12,672 INFO L432 NwaCegarLoop]: 3287 mSDtfsCounter, 94 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 6484 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:33:12,673 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 6484 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:33:12,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16775 states. [2024-11-09 06:33:13,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16775 to 15653. [2024-11-09 06:33:13,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15653 states, 13943 states have (on average 1.5129455640823353) internal successors, (21095), 13977 states have internal predecessors, (21095), 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 06:33:13,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15653 states to 15653 states and 23223 transitions. [2024-11-09 06:33:13,624 INFO L78 Accepts]: Start accepts. Automaton has 15653 states and 23223 transitions. Word has length 134 [2024-11-09 06:33:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:33:13,625 INFO L471 AbstractCegarLoop]: Abstraction has 15653 states and 23223 transitions. [2024-11-09 06:33:13,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 06:33:13,625 INFO L276 IsEmpty]: Start isEmpty. Operand 15653 states and 23223 transitions. [2024-11-09 06:33:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 06:33:13,672 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:33:13,673 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, 1] [2024-11-09 06:33:13,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 06:33:13,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 06:33:13,874 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:33:13,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:33:13,875 INFO L85 PathProgramCache]: Analyzing trace with hash -251254877, now seen corresponding path program 1 times [2024-11-09 06:33:13,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:33:13,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356684868] [2024-11-09 06:33:13,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:13,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:33:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:14,484 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 06:33:14,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:33:14,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356684868] [2024-11-09 06:33:14,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356684868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:33:14,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046285747] [2024-11-09 06:33:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:33:14,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:33:14,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:33:14,488 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:33:14,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:33:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:14,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 06:33:14,702 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:33:15,203 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 06:33:15,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:33:15,858 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 06:33:15,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046285747] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:33:15,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1549414622] [2024-11-09 06:33:15,891 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2024-11-09 06:33:15,891 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:33:15,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:33:15,901 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:33:15,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:33:38,031 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 192 for LOIs [2024-11-09 06:33:38,275 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 181 for LOIs [2024-11-09 06:33:38,525 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 144 for LOIs [2024-11-09 06:33:38,630 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 75 for LOIs [2024-11-09 06:33:38,697 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 108 for LOIs [2024-11-09 06:33:38,959 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 75 for LOIs [2024-11-09 06:33:40,564 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:33:59,752 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '195888#(and (= ~a15~0 1) (exists ((|v_ULTIMATE.start_eval_~tmp~0#1_21| Int)) (and (not (= |v_ULTIMATE.start_eval_~tmp~0#1_21| 0)) (<= |v_ULTIMATE.start_eval_~tmp~0#1_21| 1) (<= 0 |v_ULTIMATE.start_eval_~tmp~0#1_21|))) (= 5 ~a20~0) (<= 1 |#StackHeapBarrier|) (<= ~local~0 2147483647) (= 0 ~t5_pc~0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~a25~0 1) (<= 0 (+ ~local~0 2147483648)) (= ~a~0 1) (= ~d~0 4) (= 0 ~t3_pc~0) (= ~a16~0 1) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (exists ((|v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_17| Int)) (and (<= 0 (+ |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_17| 2147483648)) (not (= |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_17| 0)) (<= |v_ULTIMATE.start_eval_~tmp_ndt_1~0#1_17| 2147483647))) (= ~a9~0 18) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (= 0 ~t2_pc~0) (= ~m_st~0 1) (<= ~token~0 2147483647) (= ~t5_i~0 1) (= ~a27~0 1) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)) (= ~a2~0 10) (not (= ~token~0 (+ 5 ~local~0))))' at error location [2024-11-09 06:33:59,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:33:59,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:33:59,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 21 [2024-11-09 06:33:59,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087274755] [2024-11-09 06:33:59,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:33:59,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 06:33:59,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:33:59,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 06:33:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=3304, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 06:33:59,756 INFO L87 Difference]: Start difference. First operand 15653 states and 23223 transitions. Second operand has 21 states, 14 states have (on average 15.071428571428571) internal successors, (211), 16 states have internal predecessors, (211), 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 06:34:04,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:04,202 INFO L93 Difference]: Finished difference Result 48303 states and 69811 transitions. [2024-11-09 06:34:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 06:34:04,203 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 15.071428571428571) internal successors, (211), 16 states have internal predecessors, (211), 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 138 [2024-11-09 06:34:04,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:04,333 INFO L225 Difference]: With dead ends: 48303 [2024-11-09 06:34:04,334 INFO L226 Difference]: Without dead ends: 34297 [2024-11-09 06:34:04,378 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 346 SyntacticMatches, 38 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4353 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=978, Invalid=7578, Unknown=0, NotChecked=0, Total=8556 [2024-11-09 06:34:04,378 INFO L432 NwaCegarLoop]: 3157 mSDtfsCounter, 15856 mSDsluCounter, 22043 mSDsCounter, 0 mSdLazyCounter, 2970 mSolverCounterSat, 791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15856 SdHoareTripleChecker+Valid, 25200 SdHoareTripleChecker+Invalid, 3761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 2970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:04,379 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15856 Valid, 25200 Invalid, 3761 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [791 Valid, 2970 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-09 06:34:04,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34297 states. [2024-11-09 06:34:05,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34297 to 32003. [2024-11-09 06:34:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32003 states, 28181 states have (on average 1.4548454632553849) internal successors, (40999), 28255 states have internal predecessors, (40999), 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 06:34:05,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32003 states to 32003 states and 45615 transitions. [2024-11-09 06:34:05,669 INFO L78 Accepts]: Start accepts. Automaton has 32003 states and 45615 transitions. Word has length 138 [2024-11-09 06:34:05,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:05,670 INFO L471 AbstractCegarLoop]: Abstraction has 32003 states and 45615 transitions. [2024-11-09 06:34:05,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 15.071428571428571) internal successors, (211), 16 states have internal predecessors, (211), 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 06:34:05,670 INFO L276 IsEmpty]: Start isEmpty. Operand 32003 states and 45615 transitions. [2024-11-09 06:34:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-09 06:34:05,718 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:05,718 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, 1] [2024-11-09 06:34:05,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:34:05,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 06:34:05,919 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:34:05,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash 294238713, now seen corresponding path program 1 times [2024-11-09 06:34:05,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:05,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988647010] [2024-11-09 06:34:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:05,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:06,159 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 06:34:06,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:06,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988647010] [2024-11-09 06:34:06,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988647010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:06,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690547214] [2024-11-09 06:34:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:06,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:06,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:06,162 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:06,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:34:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:06,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:34:06,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:34:06,377 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 06:34:06,377 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:34:06,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690547214] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:06,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:34:06,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 06:34:06,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113867722] [2024-11-09 06:34:06,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:06,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:34:06,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:06,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:34:06,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:34:06,380 INFO L87 Difference]: Start difference. First operand 32003 states and 45615 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 06:34:07,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:07,898 INFO L93 Difference]: Finished difference Result 53928 states and 77133 transitions. [2024-11-09 06:34:07,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:34:07,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 135 [2024-11-09 06:34:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:08,005 INFO L225 Difference]: With dead ends: 53928 [2024-11-09 06:34:08,005 INFO L226 Difference]: Without dead ends: 32053 [2024-11-09 06:34:08,049 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 06:34:08,050 INFO L432 NwaCegarLoop]: 3277 mSDtfsCounter, 130 mSDsluCounter, 3183 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 6460 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:08,050 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 6460 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:34:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32053 states. [2024-11-09 06:34:09,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32053 to 31775. [2024-11-09 06:34:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31775 states, 27953 states have (on average 1.4418130433227203) internal successors, (40303), 28027 states have internal predecessors, (40303), 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 06:34:09,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31775 states to 31775 states and 44919 transitions. [2024-11-09 06:34:09,359 INFO L78 Accepts]: Start accepts. Automaton has 31775 states and 44919 transitions. Word has length 135 [2024-11-09 06:34:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:09,359 INFO L471 AbstractCegarLoop]: Abstraction has 31775 states and 44919 transitions. [2024-11-09 06:34:09,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 06:34:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 31775 states and 44919 transitions. [2024-11-09 06:34:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-09 06:34:09,410 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:09,410 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 06:34:09,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 06:34:09,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 06:34:09,614 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:34:09,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:09,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1968650121, now seen corresponding path program 1 times [2024-11-09 06:34:09,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:09,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762006302] [2024-11-09 06:34:09,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:09,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:09,847 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 06:34:09,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:09,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762006302] [2024-11-09 06:34:09,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762006302] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:09,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291617045] [2024-11-09 06:34:09,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:09,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:09,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:09,850 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:09,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:34:10,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:10,019 INFO L255 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:34:10,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:34:10,052 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 06:34:10,052 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:34:10,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291617045] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:10,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:34:10,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 06:34:10,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484000237] [2024-11-09 06:34:10,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:10,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:34:10,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:10,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:34:10,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:34:10,055 INFO L87 Difference]: Start difference. First operand 31775 states and 44919 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, (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 06:34:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:11,894 INFO L93 Difference]: Finished difference Result 55441 states and 77458 transitions. [2024-11-09 06:34:11,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:34:11,895 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, (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 135 [2024-11-09 06:34:11,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:12,009 INFO L225 Difference]: With dead ends: 55441 [2024-11-09 06:34:12,009 INFO L226 Difference]: Without dead ends: 35507 [2024-11-09 06:34:12,054 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 06:34:12,055 INFO L432 NwaCegarLoop]: 3208 mSDtfsCounter, 3409 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3409 SdHoareTripleChecker+Valid, 3241 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:12,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3409 Valid, 3241 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:34:12,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35507 states. [2024-11-09 06:34:13,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35507 to 35507. [2024-11-09 06:34:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35507 states, 31293 states have (on average 1.4115297350845237) internal successors, (44171), 31367 states have internal predecessors, (44171), 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 06:34:13,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35507 states to 35507 states and 49035 transitions. [2024-11-09 06:34:13,801 INFO L78 Accepts]: Start accepts. Automaton has 35507 states and 49035 transitions. Word has length 135 [2024-11-09 06:34:13,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:13,802 INFO L471 AbstractCegarLoop]: Abstraction has 35507 states and 49035 transitions. [2024-11-09 06:34:13,802 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, (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 06:34:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 35507 states and 49035 transitions. [2024-11-09 06:34:13,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-09 06:34:13,847 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:13,847 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, 1] [2024-11-09 06:34:13,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 06:34:14,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 06:34:14,048 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:34:14,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:14,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1286300768, now seen corresponding path program 1 times [2024-11-09 06:34:14,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:14,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17880500] [2024-11-09 06:34:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:14,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:14,254 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 06:34:14,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:14,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17880500] [2024-11-09 06:34:14,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17880500] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:14,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519878942] [2024-11-09 06:34:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:14,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:14,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:14,257 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:14,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:34:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:14,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:34:14,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:34:14,450 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 06:34:14,450 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:34:14,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519878942] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:14,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:34:14,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 06:34:14,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775256015] [2024-11-09 06:34:14,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:14,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:34:14,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:14,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:34:14,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:34:14,455 INFO L87 Difference]: Start difference. First operand 35507 states and 49035 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 06:34:17,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:17,095 INFO L93 Difference]: Finished difference Result 84827 states and 117036 transitions. [2024-11-09 06:34:17,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:34:17,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 136 [2024-11-09 06:34:17,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:17,269 INFO L225 Difference]: With dead ends: 84827 [2024-11-09 06:34:17,270 INFO L226 Difference]: Without dead ends: 50967 [2024-11-09 06:34:17,336 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 138 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 06:34:17,337 INFO L432 NwaCegarLoop]: 3206 mSDtfsCounter, 72 mSDsluCounter, 3181 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 6387 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:17,337 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 6387 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:34:17,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50967 states. [2024-11-09 06:34:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50967 to 41833. [2024-11-09 06:34:19,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41833 states, 37183 states have (on average 1.4233117284780679) internal successors, (52923), 37258 states have internal predecessors, (52923), 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 06:34:19,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41833 states to 41833 states and 58223 transitions. [2024-11-09 06:34:19,533 INFO L78 Accepts]: Start accepts. Automaton has 41833 states and 58223 transitions. Word has length 136 [2024-11-09 06:34:19,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:19,533 INFO L471 AbstractCegarLoop]: Abstraction has 41833 states and 58223 transitions. [2024-11-09 06:34:19,534 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 06:34:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 41833 states and 58223 transitions. [2024-11-09 06:34:19,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-11-09 06:34:19,594 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:19,594 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, 1] [2024-11-09 06:34:19,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 06:34:19,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 06:34:19,795 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:34:19,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:19,796 INFO L85 PathProgramCache]: Analyzing trace with hash 401643903, now seen corresponding path program 1 times [2024-11-09 06:34:19,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:19,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165841508] [2024-11-09 06:34:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:19,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:20,173 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 06:34:20,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:20,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165841508] [2024-11-09 06:34:20,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165841508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:20,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586904897] [2024-11-09 06:34:20,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:20,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:20,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:20,177 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:20,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:34:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:20,358 INFO L255 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 06:34:20,362 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:34:20,476 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 06:34:20,476 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:34:20,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586904897] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:20,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:34:20,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-09 06:34:20,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96461525] [2024-11-09 06:34:20,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:20,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:34:20,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:20,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:34:20,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 06:34:20,478 INFO L87 Difference]: Start difference. First operand 41833 states and 58223 transitions. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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 06:34:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:23,168 INFO L93 Difference]: Finished difference Result 66597 states and 92154 transitions. [2024-11-09 06:34:23,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:34:23,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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 141 [2024-11-09 06:34:23,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:23,262 INFO L225 Difference]: With dead ends: 66597 [2024-11-09 06:34:23,262 INFO L226 Difference]: Without dead ends: 46249 [2024-11-09 06:34:23,297 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 06:34:23,298 INFO L432 NwaCegarLoop]: 3275 mSDtfsCounter, 114 mSDsluCounter, 6415 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 9690 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:23,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 9690 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:34:23,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46249 states. [2024-11-09 06:34:25,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46249 to 43117. [2024-11-09 06:34:25,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43117 states, 37947 states have (on average 1.4182675837352097) internal successors, (53819), 38058 states have internal predecessors, (53819), 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 06:34:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43117 states to 43117 states and 59807 transitions. [2024-11-09 06:34:25,900 INFO L78 Accepts]: Start accepts. Automaton has 43117 states and 59807 transitions. Word has length 141 [2024-11-09 06:34:25,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:25,901 INFO L471 AbstractCegarLoop]: Abstraction has 43117 states and 59807 transitions. [2024-11-09 06:34:25,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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 06:34:25,901 INFO L276 IsEmpty]: Start isEmpty. Operand 43117 states and 59807 transitions. [2024-11-09 06:34:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 06:34:25,956 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:25,956 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, 1] [2024-11-09 06:34:25,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 06:34:26,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 06:34:26,157 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:34:26,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:26,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1191886080, now seen corresponding path program 1 times [2024-11-09 06:34:26,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:26,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910432556] [2024-11-09 06:34:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:26,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:26,277 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 06:34:26,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:26,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910432556] [2024-11-09 06:34:26,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910432556] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:26,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217671328] [2024-11-09 06:34:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:26,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:26,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:26,280 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:26,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:34:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:26,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:34:26,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:34:26,486 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 06:34:26,486 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:34:26,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217671328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:26,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:34:26,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 06:34:26,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559999227] [2024-11-09 06:34:26,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:26,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:34:26,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:26,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:34:26,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:34:26,489 INFO L87 Difference]: Start difference. First operand 43117 states and 59807 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 06:34:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:29,759 INFO L93 Difference]: Finished difference Result 98273 states and 135701 transitions. [2024-11-09 06:34:29,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:34:29,760 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 138 [2024-11-09 06:34:29,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:29,909 INFO L225 Difference]: With dead ends: 98273 [2024-11-09 06:34:29,909 INFO L226 Difference]: Without dead ends: 67229 [2024-11-09 06:34:29,940 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 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 06:34:29,940 INFO L432 NwaCegarLoop]: 3285 mSDtfsCounter, 96 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 6482 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:29,941 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 6482 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:34:29,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67229 states. [2024-11-09 06:34:32,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67229 to 60175. [2024-11-09 06:34:32,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60175 states, 53709 states have (on average 1.4205254240443874) internal successors, (76295), 53820 states have internal predecessors, (76295), 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 06:34:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60175 states to 60175 states and 83579 transitions. [2024-11-09 06:34:33,111 INFO L78 Accepts]: Start accepts. Automaton has 60175 states and 83579 transitions. Word has length 138 [2024-11-09 06:34:33,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:33,112 INFO L471 AbstractCegarLoop]: Abstraction has 60175 states and 83579 transitions. [2024-11-09 06:34:33,112 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 06:34:33,112 INFO L276 IsEmpty]: Start isEmpty. Operand 60175 states and 83579 transitions. [2024-11-09 06:34:33,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-09 06:34:33,168 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:33,168 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, 1] [2024-11-09 06:34:33,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 06:34:33,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 06:34:33,369 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:34:33,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:33,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1226032751, now seen corresponding path program 1 times [2024-11-09 06:34:33,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:33,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733392550] [2024-11-09 06:34:33,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:33,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:33,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:33,793 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 06:34:33,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:33,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733392550] [2024-11-09 06:34:33,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733392550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:33,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508822017] [2024-11-09 06:34:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:33,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:33,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:33,796 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:33,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:34:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:33,962 INFO L255 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:34:33,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:34:34,132 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 06:34:34,132 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:34:34,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508822017] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:34,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:34:34,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2024-11-09 06:34:34,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532718414] [2024-11-09 06:34:34,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:34,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:34:34,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:34,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:34:34,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-09 06:34:34,134 INFO L87 Difference]: Start difference. First operand 60175 states and 83579 transitions. Second operand has 6 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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) [2024-11-09 06:34:38,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:38,054 INFO L93 Difference]: Finished difference Result 111256 states and 154106 transitions. [2024-11-09 06:34:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:34:38,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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) Word has length 140 [2024-11-09 06:34:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:38,171 INFO L225 Difference]: With dead ends: 111256 [2024-11-09 06:34:38,171 INFO L226 Difference]: Without dead ends: 63130 [2024-11-09 06:34:38,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-09 06:34:38,206 INFO L432 NwaCegarLoop]: 3143 mSDtfsCounter, 3474 mSDsluCounter, 6243 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3485 SdHoareTripleChecker+Valid, 9386 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:38,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3485 Valid, 9386 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:34:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63130 states. [2024-11-09 06:34:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63130 to 62536. [2024-11-09 06:34:41,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62536 states, 55848 states have (on average 1.4081256267010458) internal successors, (78641), 55959 states have internal predecessors, (78641), 3708 states have call successors, (3708), 2978 states have call predecessors, (3708), 2978 states have return successors, (3708), 3599 states have call predecessors, (3708), 3708 states have call successors, (3708) [2024-11-09 06:34:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62536 states to 62536 states and 86057 transitions. [2024-11-09 06:34:41,718 INFO L78 Accepts]: Start accepts. Automaton has 62536 states and 86057 transitions. Word has length 140 [2024-11-09 06:34:41,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:41,718 INFO L471 AbstractCegarLoop]: Abstraction has 62536 states and 86057 transitions. [2024-11-09 06:34:41,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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) [2024-11-09 06:34:41,718 INFO L276 IsEmpty]: Start isEmpty. Operand 62536 states and 86057 transitions. [2024-11-09 06:34:41,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-09 06:34:41,774 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:41,774 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, 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 06:34:41,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 06:34:41,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 06:34:41,975 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:34:41,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:41,975 INFO L85 PathProgramCache]: Analyzing trace with hash -889103601, now seen corresponding path program 1 times [2024-11-09 06:34:41,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:41,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852938357] [2024-11-09 06:34:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:41,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 17 proven. 39 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-09 06:34:42,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:34:42,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852938357] [2024-11-09 06:34:42,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852938357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:34:42,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721510579] [2024-11-09 06:34:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:42,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:34:42,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:34:42,182 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:34:42,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bf4800d-73ad-4103-b837-36ce30632d33/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:34:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:34:42,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:34:42,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:34:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:34:42,385 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:34:42,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721510579] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:34:42,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:34:42,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 06:34:42,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771478748] [2024-11-09 06:34:42,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:34:42,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:34:42,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:42,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:34:42,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:34:42,388 INFO L87 Difference]: Start difference. First operand 62536 states and 86057 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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)