./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e28c81ffc5a1b93c1edca1581014bee1ba1c062c6df3b7a8a783721ae21bc12 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:34:33,570 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:34:33,698 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:34:33,708 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:34:33,709 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:34:33,749 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:34:33,750 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:34:33,750 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:34:33,752 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:34:33,756 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:34:33,757 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:34:33,758 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:34:33,758 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:34:33,760 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:34:33,760 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:34:33,761 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:34:33,761 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:34:33,762 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:34:33,762 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:34:33,763 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:34:33,763 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:34:33,764 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:34:33,765 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:34:33,765 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:34:33,766 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:34:33,766 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:34:33,767 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:34:33,767 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:34:33,767 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:34:33,768 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:34:33,769 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:34:33,770 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:34:33,770 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:34:33,770 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:34:33,770 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:34:33,771 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:34:33,771 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:34:33,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:33,772 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:34:33,772 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:34:33,773 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:34:33,773 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:34:33,773 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:34:33,774 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:34:33,774 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:34:33,774 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:34:33,775 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:34:33,775 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_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e28c81ffc5a1b93c1edca1581014bee1ba1c062c6df3b7a8a783721ae21bc12 [2023-11-23 20:34:34,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:34:34,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:34:34,196 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:34:34,199 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:34:34,199 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:34:34,201 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c [2023-11-23 20:34:37,396 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:34:38,292 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:34:38,292 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c [2023-11-23 20:34:38,368 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/data/5a3ce14ab/19204786e7444dffb554d367800a28ab/FLAG93f36bae0 [2023-11-23 20:34:38,388 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/data/5a3ce14ab/19204786e7444dffb554d367800a28ab [2023-11-23 20:34:38,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:34:38,398 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:34:38,402 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:38,402 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:34:38,409 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:34:38,410 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:38" (1/1) ... [2023-11-23 20:34:38,411 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@138129c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:38, skipping insertion in model container [2023-11-23 20:34:38,411 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:38" (1/1) ... [2023-11-23 20:34:38,665 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:34:41,209 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c[378560,378573] [2023-11-23 20:34:41,255 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c[383339,383352] [2023-11-23 20:34:41,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:41,484 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:34:42,871 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c[378560,378573] [2023-11-23 20:34:42,879 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/sv-benchmarks/c/combinations/Problem05_label42+token_ring.02.cil-1.c[383339,383352] [2023-11-23 20:34:42,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:42,974 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:34:42,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:42 WrapperNode [2023-11-23 20:34:42,975 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:42,976 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:42,977 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:34:42,977 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:34:42,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:42" (1/1) ... [2023-11-23 20:34:43,090 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:42" (1/1) ... [2023-11-23 20:34:43,792 INFO L138 Inliner]: procedures = 48, calls = 47, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 12628 [2023-11-23 20:34:43,793 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:43,794 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:34:43,794 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:34:43,794 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:34:43,805 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:42" (1/1) ... [2023-11-23 20:34:43,819 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:42" (1/1) ... [2023-11-23 20:34:43,890 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:42" (1/1) ... [2023-11-23 20:34:43,895 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:42" (1/1) ... [2023-11-23 20:34:44,090 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:42" (1/1) ... [2023-11-23 20:34:44,292 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:42" (1/1) ... [2023-11-23 20:34:44,340 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:42" (1/1) ... [2023-11-23 20:34:44,365 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:42" (1/1) ... [2023-11-23 20:34:44,494 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:34:44,496 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:34:44,496 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:34:44,497 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:34:44,497 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:42" (1/1) ... [2023-11-23 20:34:44,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:44,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:44,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:34:44,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:34:44,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:34:44,577 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-23 20:34:44,577 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-23 20:34:44,577 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-23 20:34:44,577 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-23 20:34:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 20:34:44,578 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 20:34:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-23 20:34:44,578 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-23 20:34:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-23 20:34:44,578 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-23 20:34:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:34:44,578 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-23 20:34:44,579 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-23 20:34:44,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:34:44,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:34:44,690 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:34:44,692 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:34:55,638 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:34:58,610 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:34:58,611 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 20:34:58,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:58 BoogieIcfgContainer [2023-11-23 20:34:58,614 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:34:58,617 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:34:58,618 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:34:58,622 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:34:58,622 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:34:38" (1/3) ... [2023-11-23 20:34:58,623 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31c477f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:58, skipping insertion in model container [2023-11-23 20:34:58,624 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:42" (2/3) ... [2023-11-23 20:34:58,624 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31c477f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:58, skipping insertion in model container [2023-11-23 20:34:58,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:58" (3/3) ... [2023-11-23 20:34:58,626 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.02.cil-1.c [2023-11-23 20:34:58,652 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:34:58,652 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 20:34:58,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:34:58,786 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1d277596, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:34:58,787 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 20:34:58,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 1724 states, 1699 states have (on average 1.9752795762213067) internal successors, (3356), 1702 states have internal predecessors, (3356), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-11-23 20:34:58,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 20:34:58,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:58,825 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:58,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:58,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:58,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1281815250, now seen corresponding path program 1 times [2023-11-23 20:34:58,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:58,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707638297] [2023-11-23 20:34:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:58,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:34:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:34:59,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:59,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707638297] [2023-11-23 20:34:59,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707638297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:34:59,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:34:59,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:34:59,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010585294] [2023-11-23 20:34:59,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:34:59,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:34:59,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:59,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:34:59,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:34:59,534 INFO L87 Difference]: Start difference. First operand has 1724 states, 1699 states have (on average 1.9752795762213067) internal successors, (3356), 1702 states have internal predecessors, (3356), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:35:00,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:00,698 INFO L93 Difference]: Finished difference Result 3512 states and 6876 transitions. [2023-11-23 20:35:00,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:35:00,702 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2023-11-23 20:35:00,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:00,741 INFO L225 Difference]: With dead ends: 3512 [2023-11-23 20:35:00,742 INFO L226 Difference]: Without dead ends: 1787 [2023-11-23 20:35:00,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:35:00,763 INFO L413 NwaCegarLoop]: 3217 mSDtfsCounter, 3455 mSDsluCounter, 3159 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3455 SdHoareTripleChecker+Valid, 6376 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:00,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3455 Valid, 6376 Invalid, 580 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 20:35:00,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2023-11-23 20:35:00,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1786. [2023-11-23 20:35:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1744 states have (on average 1.9529816513761469) internal successors, (3406), 1747 states have internal predecessors, (3406), 28 states have call successors, (28), 12 states have call predecessors, (28), 12 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2023-11-23 20:35:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 3462 transitions. [2023-11-23 20:35:01,024 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 3462 transitions. Word has length 37 [2023-11-23 20:35:01,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:01,025 INFO L495 AbstractCegarLoop]: Abstraction has 1786 states and 3462 transitions. [2023-11-23 20:35:01,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:35:01,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 3462 transitions. [2023-11-23 20:35:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 20:35:01,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:01,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:01,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:35:01,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:01,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1626811866, now seen corresponding path program 1 times [2023-11-23 20:35:01,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:01,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610663121] [2023-11-23 20:35:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:01,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:35:01,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:01,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610663121] [2023-11-23 20:35:01,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610663121] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:01,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053706054] [2023-11-23 20:35:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:01,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:01,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:01,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:01,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:35:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:01,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:35:01,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:35:01,682 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:01,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053706054] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:01,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:01,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-23 20:35:01,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721292679] [2023-11-23 20:35:01,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:01,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:01,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:01,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:01,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:01,691 INFO L87 Difference]: Start difference. First operand 1786 states and 3462 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 20:35:02,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:02,292 INFO L93 Difference]: Finished difference Result 2059 states and 3833 transitions. [2023-11-23 20:35:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:02,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2023-11-23 20:35:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:02,310 INFO L225 Difference]: With dead ends: 2059 [2023-11-23 20:35:02,310 INFO L226 Difference]: Without dead ends: 1919 [2023-11-23 20:35:02,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:02,314 INFO L413 NwaCegarLoop]: 3175 mSDtfsCounter, 3351 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3351 SdHoareTripleChecker+Valid, 3253 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:02,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3351 Valid, 3253 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:35:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2023-11-23 20:35:02,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1915. [2023-11-23 20:35:02,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1839 states have (on average 1.9189777052746058) internal successors, (3529), 1843 states have internal predecessors, (3529), 50 states have call successors, (50), 24 states have call predecessors, (50), 24 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-23 20:35:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 3629 transitions. [2023-11-23 20:35:02,414 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 3629 transitions. Word has length 67 [2023-11-23 20:35:02,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:02,415 INFO L495 AbstractCegarLoop]: Abstraction has 1915 states and 3629 transitions. [2023-11-23 20:35:02,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 20:35:02,416 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 3629 transitions. [2023-11-23 20:35:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 20:35:02,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:02,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:02,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 20:35:02,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:02,644 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:02,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:02,645 INFO L85 PathProgramCache]: Analyzing trace with hash 676455738, now seen corresponding path program 1 times [2023-11-23 20:35:02,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:02,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101960848] [2023-11-23 20:35:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:02,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 20:35:03,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:03,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101960848] [2023-11-23 20:35:03,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101960848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:03,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:03,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:35:03,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681328314] [2023-11-23 20:35:03,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:03,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:35:03,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:03,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:35:03,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:03,427 INFO L87 Difference]: Start difference. First operand 1915 states and 3629 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-23 20:35:04,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:04,772 INFO L93 Difference]: Finished difference Result 2461 states and 4343 transitions. [2023-11-23 20:35:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:35:04,773 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 67 [2023-11-23 20:35:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:04,794 INFO L225 Difference]: With dead ends: 2461 [2023-11-23 20:35:04,794 INFO L226 Difference]: Without dead ends: 2193 [2023-11-23 20:35:04,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-23 20:35:04,803 INFO L413 NwaCegarLoop]: 3144 mSDtfsCounter, 3500 mSDsluCounter, 9343 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3511 SdHoareTripleChecker+Valid, 12487 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:04,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3511 Valid, 12487 Invalid, 1090 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [75 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 20:35:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2193 states. [2023-11-23 20:35:04,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2193 to 2157. [2023-11-23 20:35:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2015 states have (on average 1.8615384615384616) internal successors, (3751), 2021 states have internal predecessors, (3751), 92 states have call successors, (92), 48 states have call predecessors, (92), 48 states have return successors, (92), 88 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-23 20:35:04,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 3935 transitions. [2023-11-23 20:35:04,965 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 3935 transitions. Word has length 67 [2023-11-23 20:35:04,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:04,966 INFO L495 AbstractCegarLoop]: Abstraction has 2157 states and 3935 transitions. [2023-11-23 20:35:04,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2023-11-23 20:35:04,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 3935 transitions. [2023-11-23 20:35:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 20:35:04,973 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:04,974 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:04,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:35:04,975 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:04,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1000121855, now seen corresponding path program 1 times [2023-11-23 20:35:04,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:04,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280399969] [2023-11-23 20:35:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:04,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:05,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-23 20:35:05,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:05,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280399969] [2023-11-23 20:35:05,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280399969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:05,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:05,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:05,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462072190] [2023-11-23 20:35:05,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:05,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:05,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:05,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:05,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:05,099 INFO L87 Difference]: Start difference. First operand 2157 states and 3935 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 20:35:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:05,712 INFO L93 Difference]: Finished difference Result 2556 states and 4456 transitions. [2023-11-23 20:35:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:05,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 69 [2023-11-23 20:35:05,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:05,735 INFO L225 Difference]: With dead ends: 2556 [2023-11-23 20:35:05,736 INFO L226 Difference]: Without dead ends: 2290 [2023-11-23 20:35:05,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:05,746 INFO L413 NwaCegarLoop]: 3185 mSDtfsCounter, 37 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 6329 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:05,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 6329 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:35:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2023-11-23 20:35:05,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 2227. [2023-11-23 20:35:05,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2077 states have (on average 1.848338950409244) internal successors, (3839), 2083 states have internal predecessors, (3839), 96 states have call successors, (96), 52 states have call predecessors, (96), 52 states have return successors, (96), 92 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-23 20:35:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 4031 transitions. [2023-11-23 20:35:05,895 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 4031 transitions. Word has length 69 [2023-11-23 20:35:05,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:05,897 INFO L495 AbstractCegarLoop]: Abstraction has 2227 states and 4031 transitions. [2023-11-23 20:35:05,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-23 20:35:05,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 4031 transitions. [2023-11-23 20:35:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-11-23 20:35:05,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:05,904 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:35:05,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:35:05,904 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:05,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:05,905 INFO L85 PathProgramCache]: Analyzing trace with hash 323751713, now seen corresponding path program 1 times [2023-11-23 20:35:05,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:05,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354946999] [2023-11-23 20:35:05,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:05,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-23 20:35:06,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:06,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354946999] [2023-11-23 20:35:06,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354946999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:06,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:06,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:06,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159212303] [2023-11-23 20:35:06,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:06,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:06,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:06,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:06,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:06,047 INFO L87 Difference]: Start difference. First operand 2227 states and 4031 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:35:06,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:06,637 INFO L93 Difference]: Finished difference Result 3097 states and 5174 transitions. [2023-11-23 20:35:06,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:06,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 88 [2023-11-23 20:35:06,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:06,659 INFO L225 Difference]: With dead ends: 3097 [2023-11-23 20:35:06,660 INFO L226 Difference]: Without dead ends: 2516 [2023-11-23 20:35:06,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:06,666 INFO L413 NwaCegarLoop]: 3176 mSDtfsCounter, 3343 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3343 SdHoareTripleChecker+Valid, 3254 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:06,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3343 Valid, 3254 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:35:06,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2023-11-23 20:35:06,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2508. [2023-11-23 20:35:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2508 states, 2288 states have (on average 1.7932692307692308) internal successors, (4103), 2296 states have internal predecessors, (4103), 140 states have call successors, (140), 78 states have call predecessors, (140), 78 states have return successors, (140), 134 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-23 20:35:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2508 states to 2508 states and 4383 transitions. [2023-11-23 20:35:06,820 INFO L78 Accepts]: Start accepts. Automaton has 2508 states and 4383 transitions. Word has length 88 [2023-11-23 20:35:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:06,822 INFO L495 AbstractCegarLoop]: Abstraction has 2508 states and 4383 transitions. [2023-11-23 20:35:06,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:35:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2508 states and 4383 transitions. [2023-11-23 20:35:06,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-23 20:35:06,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:06,834 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:06,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:35:06,834 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:06,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:06,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1839116067, now seen corresponding path program 1 times [2023-11-23 20:35:06,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:06,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763457300] [2023-11-23 20:35:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:06,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 20:35:07,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:07,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763457300] [2023-11-23 20:35:07,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763457300] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:07,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756357187] [2023-11-23 20:35:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:07,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:07,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:07,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:07,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:35:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:07,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:35:07,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:35:07,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:07,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756357187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:07,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:07,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-23 20:35:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716590195] [2023-11-23 20:35:07,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:07,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:07,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:07,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:07,271 INFO L87 Difference]: Start difference. First operand 2508 states and 4383 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2023-11-23 20:35:07,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:07,880 INFO L93 Difference]: Finished difference Result 3271 states and 5385 transitions. [2023-11-23 20:35:07,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:07,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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 101 [2023-11-23 20:35:07,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:07,903 INFO L225 Difference]: With dead ends: 3271 [2023-11-23 20:35:07,903 INFO L226 Difference]: Without dead ends: 2691 [2023-11-23 20:35:07,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:07,907 INFO L413 NwaCegarLoop]: 3181 mSDtfsCounter, 46 mSDsluCounter, 3145 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 6326 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:07,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 6326 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:35:07,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2023-11-23 20:35:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 2597. [2023-11-23 20:35:08,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2597 states, 2365 states have (on average 1.7822410147991543) internal successors, (4215), 2373 states have internal predecessors, (4215), 146 states have call successors, (146), 84 states have call predecessors, (146), 84 states have return successors, (146), 140 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-23 20:35:08,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 4507 transitions. [2023-11-23 20:35:08,035 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 4507 transitions. Word has length 101 [2023-11-23 20:35:08,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:08,035 INFO L495 AbstractCegarLoop]: Abstraction has 2597 states and 4507 transitions. [2023-11-23 20:35:08,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2023-11-23 20:35:08,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 4507 transitions. [2023-11-23 20:35:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-23 20:35:08,040 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:08,040 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:08,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:08,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 20:35:08,256 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:08,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:08,256 INFO L85 PathProgramCache]: Analyzing trace with hash 618026699, now seen corresponding path program 2 times [2023-11-23 20:35:08,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:08,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806529660] [2023-11-23 20:35:08,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:08,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 20:35:08,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:08,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806529660] [2023-11-23 20:35:08,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806529660] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:08,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528350767] [2023-11-23 20:35:08,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:35:08,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:08,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:08,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:08,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:35:08,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-23 20:35:08,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:35:08,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:35:08,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-23 20:35:08,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:08,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528350767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:08,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:08,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-23 20:35:08,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606328718] [2023-11-23 20:35:08,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:08,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:08,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:08,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:35:08,670 INFO L87 Difference]: Start difference. First operand 2597 states and 4507 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-23 20:35:09,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:09,235 INFO L93 Difference]: Finished difference Result 3272 states and 5429 transitions. [2023-11-23 20:35:09,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:09,236 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 101 [2023-11-23 20:35:09,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:09,254 INFO L225 Difference]: With dead ends: 3272 [2023-11-23 20:35:09,254 INFO L226 Difference]: Without dead ends: 2603 [2023-11-23 20:35:09,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:35:09,258 INFO L413 NwaCegarLoop]: 3183 mSDtfsCounter, 87 mSDsluCounter, 3135 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 6318 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:09,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 6318 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:35:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2023-11-23 20:35:09,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 2593. [2023-11-23 20:35:09,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2361 states have (on average 1.7750952986022872) internal successors, (4191), 2369 states have internal predecessors, (4191), 146 states have call successors, (146), 84 states have call predecessors, (146), 84 states have return successors, (146), 140 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-23 20:35:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 4483 transitions. [2023-11-23 20:35:09,364 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 4483 transitions. Word has length 101 [2023-11-23 20:35:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:09,365 INFO L495 AbstractCegarLoop]: Abstraction has 2593 states and 4483 transitions. [2023-11-23 20:35:09,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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) [2023-11-23 20:35:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 4483 transitions. [2023-11-23 20:35:09,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-23 20:35:09,369 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:09,369 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-11-23 20:35:09,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:09,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 20:35:09,584 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:09,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:09,584 INFO L85 PathProgramCache]: Analyzing trace with hash 274105609, now seen corresponding path program 1 times [2023-11-23 20:35:09,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:09,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967297988] [2023-11-23 20:35:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:09,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:09,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 20:35:09,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:09,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967297988] [2023-11-23 20:35:09,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967297988] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:09,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102862948] [2023-11-23 20:35:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:09,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:09,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:09,809 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:09,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:35:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:09,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:35:09,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-23 20:35:09,979 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:09,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102862948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:09,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:09,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-23 20:35:09,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321562690] [2023-11-23 20:35:09,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:09,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:09,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:09,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:09,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:35:09,981 INFO L87 Difference]: Start difference. First operand 2593 states and 4483 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-11-23 20:35:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:10,425 INFO L93 Difference]: Finished difference Result 3403 states and 5516 transitions. [2023-11-23 20:35:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:10,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 101 [2023-11-23 20:35:10,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:10,444 INFO L225 Difference]: With dead ends: 3403 [2023-11-23 20:35:10,444 INFO L226 Difference]: Without dead ends: 2769 [2023-11-23 20:35:10,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:35:10,449 INFO L413 NwaCegarLoop]: 3152 mSDtfsCounter, 3353 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3353 SdHoareTripleChecker+Valid, 3171 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:10,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3353 Valid, 3171 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:35:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2023-11-23 20:35:10,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 2769. [2023-11-23 20:35:10,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2769 states, 2509 states have (on average 1.7365484256675967) internal successors, (4357), 2517 states have internal predecessors, (4357), 154 states have call successors, (154), 104 states have call predecessors, (154), 104 states have return successors, (154), 148 states have call predecessors, (154), 154 states have call successors, (154) [2023-11-23 20:35:10,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2769 states to 2769 states and 4665 transitions. [2023-11-23 20:35:10,586 INFO L78 Accepts]: Start accepts. Automaton has 2769 states and 4665 transitions. Word has length 101 [2023-11-23 20:35:10,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:10,588 INFO L495 AbstractCegarLoop]: Abstraction has 2769 states and 4665 transitions. [2023-11-23 20:35:10,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2023-11-23 20:35:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2769 states and 4665 transitions. [2023-11-23 20:35:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-11-23 20:35:10,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:10,601 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2023-11-23 20:35:10,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:10,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 20:35:10,818 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:10,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:10,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1793436148, now seen corresponding path program 1 times [2023-11-23 20:35:10,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:10,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125189055] [2023-11-23 20:35:10,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:10,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-23 20:35:11,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:11,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125189055] [2023-11-23 20:35:11,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125189055] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:11,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271048698] [2023-11-23 20:35:11,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:11,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:11,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:11,220 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:11,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:35:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:11,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:35:11,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 20:35:11,390 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:11,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271048698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:11,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:11,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-23 20:35:11,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475377300] [2023-11-23 20:35:11,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:11,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:11,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:11,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:11,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:35:11,393 INFO L87 Difference]: Start difference. First operand 2769 states and 4665 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2023-11-23 20:35:12,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:12,022 INFO L93 Difference]: Finished difference Result 4323 states and 6620 transitions. [2023-11-23 20:35:12,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:12,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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 102 [2023-11-23 20:35:12,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:12,042 INFO L225 Difference]: With dead ends: 4323 [2023-11-23 20:35:12,043 INFO L226 Difference]: Without dead ends: 3201 [2023-11-23 20:35:12,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:35:12,047 INFO L413 NwaCegarLoop]: 3158 mSDtfsCounter, 42 mSDsluCounter, 3133 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 6291 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:12,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 6291 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:35:12,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2023-11-23 20:35:12,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2899. [2023-11-23 20:35:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2619 states have (on average 1.7216494845360826) internal successors, (4509), 2628 states have internal predecessors, (4509), 164 states have call successors, (164), 114 states have call predecessors, (164), 114 states have return successors, (164), 157 states have call predecessors, (164), 164 states have call successors, (164) [2023-11-23 20:35:12,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 4837 transitions. [2023-11-23 20:35:12,177 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 4837 transitions. Word has length 102 [2023-11-23 20:35:12,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:12,177 INFO L495 AbstractCegarLoop]: Abstraction has 2899 states and 4837 transitions. [2023-11-23 20:35:12,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2023-11-23 20:35:12,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 4837 transitions. [2023-11-23 20:35:12,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-11-23 20:35:12,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:12,182 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1] [2023-11-23 20:35:12,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:12,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:12,397 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:12,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:12,398 INFO L85 PathProgramCache]: Analyzing trace with hash 662171197, now seen corresponding path program 1 times [2023-11-23 20:35:12,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:12,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087978109] [2023-11-23 20:35:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:12,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-23 20:35:12,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:12,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087978109] [2023-11-23 20:35:12,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087978109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:12,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965913537] [2023-11-23 20:35:12,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:12,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:12,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:12,608 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:12,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:35:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:12,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:35:12,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 20:35:12,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:12,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965913537] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:12,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:12,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2023-11-23 20:35:12,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494283741] [2023-11-23 20:35:12,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:12,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:35:12,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:12,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:35:12,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:35:12,909 INFO L87 Difference]: Start difference. First operand 2899 states and 4837 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-23 20:35:13,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:13,489 INFO L93 Difference]: Finished difference Result 3967 states and 6180 transitions. [2023-11-23 20:35:13,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:35:13,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 104 [2023-11-23 20:35:13,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:13,505 INFO L225 Difference]: With dead ends: 3967 [2023-11-23 20:35:13,506 INFO L226 Difference]: Without dead ends: 3323 [2023-11-23 20:35:13,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:35:13,510 INFO L413 NwaCegarLoop]: 3201 mSDtfsCounter, 3377 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3377 SdHoareTripleChecker+Valid, 3298 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:13,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3377 Valid, 3298 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:35:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2023-11-23 20:35:13,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3150. [2023-11-23 20:35:13,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3150 states, 2837 states have (on average 1.676771237222418) internal successors, (4757), 2848 states have internal predecessors, (4757), 174 states have call successors, (174), 137 states have call predecessors, (174), 137 states have return successors, (184), 165 states have call predecessors, (184), 174 states have call successors, (184) [2023-11-23 20:35:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 5115 transitions. [2023-11-23 20:35:13,670 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 5115 transitions. Word has length 104 [2023-11-23 20:35:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:13,671 INFO L495 AbstractCegarLoop]: Abstraction has 3150 states and 5115 transitions. [2023-11-23 20:35:13,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2023-11-23 20:35:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 5115 transitions. [2023-11-23 20:35:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-23 20:35:13,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:13,676 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:35:13,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:13,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 20:35:13,897 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:13,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:13,898 INFO L85 PathProgramCache]: Analyzing trace with hash 580241263, now seen corresponding path program 1 times [2023-11-23 20:35:13,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:13,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136271535] [2023-11-23 20:35:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:13,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-23 20:35:14,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:14,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136271535] [2023-11-23 20:35:14,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136271535] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:14,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453254320] [2023-11-23 20:35:14,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:14,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:14,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:14,118 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:14,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:35:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:14,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 20:35:14,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-23 20:35:14,358 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:14,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453254320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:14,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:14,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2023-11-23 20:35:14,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317299418] [2023-11-23 20:35:14,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:14,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:35:14,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:14,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:35:14,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:14,362 INFO L87 Difference]: Start difference. First operand 3150 states and 5115 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:35:15,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:15,506 INFO L93 Difference]: Finished difference Result 5330 states and 7766 transitions. [2023-11-23 20:35:15,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 20:35:15,507 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 105 [2023-11-23 20:35:15,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:15,518 INFO L225 Difference]: With dead ends: 5330 [2023-11-23 20:35:15,519 INFO L226 Difference]: Without dead ends: 3829 [2023-11-23 20:35:15,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:35:15,524 INFO L413 NwaCegarLoop]: 3142 mSDtfsCounter, 6776 mSDsluCounter, 6218 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6787 SdHoareTripleChecker+Valid, 9360 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:15,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6787 Valid, 9360 Invalid, 830 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [90 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:35:15,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2023-11-23 20:35:15,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 3827. [2023-11-23 20:35:15,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3372 states have (on average 1.594306049822064) internal successors, (5376), 3387 states have internal predecessors, (5376), 252 states have call successors, (252), 201 states have call predecessors, (252), 201 states have return successors, (265), 239 states have call predecessors, (265), 252 states have call successors, (265) [2023-11-23 20:35:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 5893 transitions. [2023-11-23 20:35:15,751 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 5893 transitions. Word has length 105 [2023-11-23 20:35:15,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:15,751 INFO L495 AbstractCegarLoop]: Abstraction has 3827 states and 5893 transitions. [2023-11-23 20:35:15,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-23 20:35:15,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 5893 transitions. [2023-11-23 20:35:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-23 20:35:15,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:15,758 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:35:15,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:15,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 20:35:15,977 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:15,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:15,977 INFO L85 PathProgramCache]: Analyzing trace with hash 878469231, now seen corresponding path program 1 times [2023-11-23 20:35:15,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:15,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022358162] [2023-11-23 20:35:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:15,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-23 20:35:16,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:16,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022358162] [2023-11-23 20:35:16,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022358162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:16,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557767604] [2023-11-23 20:35:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:16,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:16,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:16,078 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:16,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 20:35:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:16,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 20:35:16,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:35:16,257 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:16,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557767604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:16,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:16,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-23 20:35:16,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198523601] [2023-11-23 20:35:16,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:16,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:16,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:16,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:16,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:16,260 INFO L87 Difference]: Start difference. First operand 3827 states and 5893 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2023-11-23 20:35:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:16,972 INFO L93 Difference]: Finished difference Result 5791 states and 8312 transitions. [2023-11-23 20:35:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:16,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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 105 [2023-11-23 20:35:16,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:16,987 INFO L225 Difference]: With dead ends: 5791 [2023-11-23 20:35:16,988 INFO L226 Difference]: Without dead ends: 4333 [2023-11-23 20:35:16,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:16,995 INFO L413 NwaCegarLoop]: 3191 mSDtfsCounter, 49 mSDsluCounter, 3145 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 6336 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:16,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 6336 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:35:17,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2023-11-23 20:35:17,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 4035. [2023-11-23 20:35:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 3544 states have (on average 1.5790067720090293) internal successors, (5596), 3559 states have internal predecessors, (5596), 270 states have call successors, (270), 219 states have call predecessors, (270), 219 states have return successors, (283), 257 states have call predecessors, (283), 270 states have call successors, (283) [2023-11-23 20:35:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 6149 transitions. [2023-11-23 20:35:17,233 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 6149 transitions. Word has length 105 [2023-11-23 20:35:17,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:17,233 INFO L495 AbstractCegarLoop]: Abstraction has 4035 states and 6149 transitions. [2023-11-23 20:35:17,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 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) [2023-11-23 20:35:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 6149 transitions. [2023-11-23 20:35:17,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-23 20:35:17,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:17,241 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 20:35:17,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:17,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 20:35:17,459 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:17,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:17,459 INFO L85 PathProgramCache]: Analyzing trace with hash -895369607, now seen corresponding path program 1 times [2023-11-23 20:35:17,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:17,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874770331] [2023-11-23 20:35:17,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:17,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-23 20:35:18,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:18,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874770331] [2023-11-23 20:35:18,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874770331] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:18,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138441197] [2023-11-23 20:35:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:18,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:18,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:18,014 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:18,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f93a028-daf2-4e8f-91ec-db8f3e5c5217/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 20:35:18,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:18,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:35:18,157 INFO L285 TraceCheckSpWp]: Computing forward predicates...