./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/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_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/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 64bit --witnessprinter.graph.data.programhash 00358a78c5c5addd9e5a7ab9d5fbe39a67a857ec32575d905ee2c6c7ab2b30b6 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:28:09,429 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:28:09,531 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:28:09,536 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:28:09,536 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:28:09,582 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:28:09,583 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:28:09,584 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:28:09,584 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:28:09,585 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:28:09,586 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:28:09,586 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:28:09,587 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:28:09,588 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:28:09,588 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:28:09,589 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:28:09,590 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:28:09,590 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:28:09,591 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:28:09,591 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:28:09,592 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:28:09,599 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:28:09,600 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:28:09,601 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:28:09,601 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:28:09,602 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:28:09,603 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:28:09,603 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:28:09,604 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:28:09,604 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:28:09,605 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:28:09,605 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:28:09,606 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:28:09,606 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:28:09,607 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:09,608 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:28:09,608 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:28:09,609 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:28:09,609 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:28:09,610 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:28:09,610 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:28:09,611 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:28:09,612 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:28:09,612 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:28:09,613 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_8c52b9d8-ec0a-43d1-abba-e553f954f491/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00358a78c5c5addd9e5a7ab9d5fbe39a67a857ec32575d905ee2c6c7ab2b30b6 [2023-11-23 21:28:09,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:28:09,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:28:09,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:28:09,944 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:28:09,945 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:28:09,947 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2023-11-23 21:28:12,984 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:28:13,694 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:28:13,696 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2023-11-23 21:28:13,753 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/data/e1cc24442/fe790a0c67584006a49fc56c53322f42/FLAG4574be832 [2023-11-23 21:28:13,772 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/data/e1cc24442/fe790a0c67584006a49fc56c53322f42 [2023-11-23 21:28:13,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:28:13,782 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:28:13,784 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:13,784 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:28:13,790 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:28:13,791 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:13" (1/1) ... [2023-11-23 21:28:13,792 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a8bbabf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:13, skipping insertion in model container [2023-11-23 21:28:13,792 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:13" (1/1) ... [2023-11-23 21:28:13,965 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:28:15,555 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_8c52b9d8-ec0a-43d1-abba-e553f954f491/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i[218619,218632] [2023-11-23 21:28:15,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:15,802 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:28:16,126 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_8c52b9d8-ec0a-43d1-abba-e553f954f491/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i[218619,218632] [2023-11-23 21:28:16,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:16,266 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:28:16,267 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:16 WrapperNode [2023-11-23 21:28:16,268 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:16,269 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:28:16,269 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:28:16,269 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:28:16,341 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:16" (1/1) ... [2023-11-23 21:28:16,464 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:16" (1/1) ... [2023-11-23 21:28:16,678 INFO L138 Inliner]: procedures = 250, calls = 1527, calls flagged for inlining = 88, calls inlined = 80, statements flattened = 3654 [2023-11-23 21:28:16,678 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:28:16,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:28:16,679 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:28:16,680 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:28:16,690 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:16" (1/1) ... [2023-11-23 21:28:16,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:16" (1/1) ... [2023-11-23 21:28:16,744 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:16" (1/1) ... [2023-11-23 21:28:16,747 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:16" (1/1) ... [2023-11-23 21:28:16,861 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:16" (1/1) ... [2023-11-23 21:28:16,898 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:16" (1/1) ... [2023-11-23 21:28:16,933 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:16" (1/1) ... [2023-11-23 21:28:16,955 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:16" (1/1) ... [2023-11-23 21:28:16,991 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:28:16,994 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:28:16,995 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:28:16,995 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:28:16,996 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:16" (1/1) ... [2023-11-23 21:28:17,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:17,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:17,031 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:28:17,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:28:17,160 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2023-11-23 21:28:17,161 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2023-11-23 21:28:17,161 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-23 21:28:17,161 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-23 21:28:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure uas_zap_pending [2023-11-23 21:28:17,162 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_zap_pending [2023-11-23 21:28:17,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:28:17,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:28:17,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:28:17,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:28:17,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-23 21:28:17,165 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-23 21:28:17,165 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2023-11-23 21:28:17,165 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2023-11-23 21:28:17,165 INFO L130 BoogieDeclarations]: Found specification of procedure uas_alloc_data_urb [2023-11-23 21:28:17,165 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_alloc_data_urb [2023-11-23 21:28:17,166 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:28:17,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:28:17,166 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2023-11-23 21:28:17,167 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2023-11-23 21:28:17,167 INFO L130 BoogieDeclarations]: Found specification of procedure dev_printk [2023-11-23 21:28:17,168 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_printk [2023-11-23 21:28:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2023-11-23 21:28:17,168 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2023-11-23 21:28:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:28:17,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:28:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure uas_add_work [2023-11-23 21:28:17,170 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_add_work [2023-11-23 21:28:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize_scsi_host_template_3 [2023-11-23 21:28:17,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize_scsi_host_template_3 [2023-11-23 21:28:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 21:28:17,172 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 21:28:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:28:17,172 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:28:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure uas_find_endpoints [2023-11-23 21:28:17,172 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_find_endpoints [2023-11-23 21:28:17,173 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 21:28:17,173 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 21:28:17,173 INFO L130 BoogieDeclarations]: Found specification of procedure uas_log_cmd_state [2023-11-23 21:28:17,173 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_log_cmd_state [2023-11-23 21:28:17,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:28:17,174 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-23 21:28:17,174 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-23 21:28:17,174 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unlink_urb [2023-11-23 21:28:17,174 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unlink_urb [2023-11-23 21:28:17,174 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_urb [2023-11-23 21:28:17,174 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_urb [2023-11-23 21:28:17,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:28:17,175 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_num [2023-11-23 21:28:17,175 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_num [2023-11-23 21:28:17,175 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_1 [2023-11-23 21:28:17,175 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_1 [2023-11-23 21:28:17,176 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 21:28:17,176 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 21:28:17,176 INFO L130 BoogieDeclarations]: Found specification of procedure uas_xfer_data [2023-11-23 21:28:17,176 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_xfer_data [2023-11-23 21:28:17,176 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2023-11-23 21:28:17,177 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2023-11-23 21:28:17,177 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wait_anchor_empty_timeout [2023-11-23 21:28:17,177 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wait_anchor_empty_timeout [2023-11-23 21:28:17,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:28:17,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:28:17,179 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 21:28:17,180 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 21:28:17,180 INFO L130 BoogieDeclarations]: Found specification of procedure uas_try_complete [2023-11-23 21:28:17,180 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_try_complete [2023-11-23 21:28:17,180 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_report_bus_reset [2023-11-23 21:28:17,181 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_report_bus_reset [2023-11-23 21:28:17,181 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-23 21:28:17,181 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-23 21:28:17,181 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2023-11-23 21:28:17,181 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2023-11-23 21:28:17,182 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2023-11-23 21:28:17,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2023-11-23 21:28:17,183 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-23 21:28:17,183 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-23 21:28:17,184 INFO L130 BoogieDeclarations]: Found specification of procedure uas_wait_for_pending_cmnds [2023-11-23 21:28:17,184 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_wait_for_pending_cmnds [2023-11-23 21:28:17,184 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2023-11-23 21:28:17,184 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2023-11-23 21:28:17,184 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-23 21:28:17,184 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-23 21:28:17,185 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-23 21:28:17,185 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-23 21:28:17,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:28:17,185 INFO L130 BoogieDeclarations]: Found specification of procedure uas_data_cmplt [2023-11-23 21:28:17,186 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_data_cmplt [2023-11-23 21:28:17,186 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-23 21:28:17,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-23 21:28:17,187 INFO L130 BoogieDeclarations]: Found specification of procedure __be16_to_cpup [2023-11-23 21:28:17,187 INFO L138 BoogieDeclarations]: Found implementation of procedure __be16_to_cpup [2023-11-23 21:28:17,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:28:17,187 INFO L130 BoogieDeclarations]: Found specification of procedure uas_shutdown [2023-11-23 21:28:17,187 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_shutdown [2023-11-23 21:28:17,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:28:17,188 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2023-11-23 21:28:17,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2023-11-23 21:28:17,188 INFO L130 BoogieDeclarations]: Found specification of procedure uas_do_work [2023-11-23 21:28:17,188 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_do_work [2023-11-23 21:28:17,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:28:17,189 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:28:17,189 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-23 21:28:17,189 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-23 21:28:17,189 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-23 21:28:17,189 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-23 21:28:17,190 INFO L130 BoogieDeclarations]: Found specification of procedure uas_disconnect [2023-11-23 21:28:17,190 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_disconnect [2023-11-23 21:28:17,190 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2023-11-23 21:28:17,190 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2023-11-23 21:28:17,191 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2023-11-23 21:28:17,191 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2023-11-23 21:28:17,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:28:17,192 INFO L130 BoogieDeclarations]: Found specification of procedure usb_pipe_endpoint [2023-11-23 21:28:17,192 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_pipe_endpoint [2023-11-23 21:28:17,192 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_out [2023-11-23 21:28:17,192 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_out [2023-11-23 21:28:17,192 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:28:17,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:28:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-23 21:28:17,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-23 21:28:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure uas_stat_cmplt [2023-11-23 21:28:17,194 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_stat_cmplt [2023-11-23 21:28:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:28:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:28:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_udev [2023-11-23 21:28:17,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_udev [2023-11-23 21:28:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-23 21:28:17,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-23 21:28:17,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:28:17,196 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:28:17,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:28:17,196 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_host_put [2023-11-23 21:28:17,196 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_host_put [2023-11-23 21:28:17,197 INFO L130 BoogieDeclarations]: Found specification of procedure uas_configure_endpoints [2023-11-23 21:28:17,197 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_configure_endpoints [2023-11-23 21:28:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-23 21:28:17,198 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-23 21:28:17,198 INFO L130 BoogieDeclarations]: Found specification of procedure uas_free_unsubmitted_urbs [2023-11-23 21:28:17,199 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_free_unsubmitted_urbs [2023-11-23 21:28:17,199 INFO L130 BoogieDeclarations]: Found specification of procedure uas_find_uas_alt_setting [2023-11-23 21:28:17,199 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_find_uas_alt_setting [2023-11-23 21:28:17,199 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2023-11-23 21:28:17,199 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2023-11-23 21:28:17,200 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_in [2023-11-23 21:28:17,200 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_in [2023-11-23 21:28:17,200 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-23 21:28:17,201 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-23 21:28:17,202 INFO L130 BoogieDeclarations]: Found specification of procedure lock_is_held [2023-11-23 21:28:17,205 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_is_held [2023-11-23 21:28:17,205 INFO L130 BoogieDeclarations]: Found specification of procedure uas_submit_urbs [2023-11-23 21:28:17,206 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_submit_urbs [2023-11-23 21:28:17,206 INFO L130 BoogieDeclarations]: Found specification of procedure usb_reset_device [2023-11-23 21:28:17,206 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_reset_device [2023-11-23 21:28:17,208 INFO L130 BoogieDeclarations]: Found specification of procedure blk_queue_max_hw_sectors [2023-11-23 21:28:17,209 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_queue_max_hw_sectors [2023-11-23 21:28:17,209 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-11-23 21:28:17,209 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-11-23 21:28:17,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:28:17,215 INFO L130 BoogieDeclarations]: Found specification of procedure uas_free_streams [2023-11-23 21:28:17,215 INFO L138 BoogieDeclarations]: Found implementation of procedure uas_free_streams [2023-11-23 21:28:17,216 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2023-11-23 21:28:17,216 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2023-11-23 21:28:17,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:28:17,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:28:17,877 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:28:17,881 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:28:18,355 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:28:21,522 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:28:23,255 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:28:23,255 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:28:23,257 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:28:23 BoogieIcfgContainer [2023-11-23 21:28:23,258 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:28:23,260 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:28:23,261 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:28:23,264 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:28:23,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:28:13" (1/3) ... [2023-11-23 21:28:23,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4773f77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:28:23, skipping insertion in model container [2023-11-23 21:28:23,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:16" (2/3) ... [2023-11-23 21:28:23,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4773f77d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:28:23, skipping insertion in model container [2023-11-23 21:28:23,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:28:23" (3/3) ... [2023-11-23 21:28:23,267 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--usb--storage--uas.ko-entry_point.cil.out.i [2023-11-23 21:28:23,288 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:28:23,289 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:28:23,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:28:23,443 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;@246b30ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:28:23,443 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:28:23,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 903 states, 553 states have (on average 1.3435804701627487) internal successors, (743), 592 states have internal predecessors, (743), 275 states have call successors, (275), 74 states have call predecessors, (275), 73 states have return successors, (269), 261 states have call predecessors, (269), 269 states have call successors, (269) [2023-11-23 21:28:23,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-23 21:28:23,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:23,471 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 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 21:28:23,471 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:23,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:23,479 INFO L85 PathProgramCache]: Analyzing trace with hash -665843666, now seen corresponding path program 1 times [2023-11-23 21:28:23,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:23,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044011270] [2023-11-23 21:28:23,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:23,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:28:25,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:25,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044011270] [2023-11-23 21:28:25,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044011270] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:25,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:25,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:25,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480840624] [2023-11-23 21:28:25,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:25,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:25,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:25,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:25,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:25,712 INFO L87 Difference]: Start difference. First operand has 903 states, 553 states have (on average 1.3435804701627487) internal successors, (743), 592 states have internal predecessors, (743), 275 states have call successors, (275), 74 states have call predecessors, (275), 73 states have return successors, (269), 261 states have call predecessors, (269), 269 states have call successors, (269) Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-23 21:28:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:27,056 INFO L93 Difference]: Finished difference Result 2675 states and 3814 transitions. [2023-11-23 21:28:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:27,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 52 [2023-11-23 21:28:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:27,089 INFO L225 Difference]: With dead ends: 2675 [2023-11-23 21:28:27,089 INFO L226 Difference]: Without dead ends: 1765 [2023-11-23 21:28:27,100 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 21:28:27,103 INFO L413 NwaCegarLoop]: 1128 mSDtfsCounter, 1242 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1242 SdHoareTripleChecker+Valid, 2243 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:27,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1242 Valid, 2243 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 21:28:27,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2023-11-23 21:28:27,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1761. [2023-11-23 21:28:27,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1089 states have (on average 1.3278236914600552) internal successors, (1446), 1146 states have internal predecessors, (1446), 527 states have call successors, (527), 145 states have call predecessors, (527), 144 states have return successors, (521), 505 states have call predecessors, (521), 521 states have call successors, (521) [2023-11-23 21:28:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2494 transitions. [2023-11-23 21:28:27,346 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 2494 transitions. Word has length 52 [2023-11-23 21:28:27,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:27,347 INFO L495 AbstractCegarLoop]: Abstraction has 1761 states and 2494 transitions. [2023-11-23 21:28:27,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-23 21:28:27,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 2494 transitions. [2023-11-23 21:28:27,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 21:28:27,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:27,353 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:28:27,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:28:27,354 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:27,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:27,355 INFO L85 PathProgramCache]: Analyzing trace with hash -565757796, now seen corresponding path program 1 times [2023-11-23 21:28:27,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:27,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535295557] [2023-11-23 21:28:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:27,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:28,595 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:28:28,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:28,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535295557] [2023-11-23 21:28:28,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535295557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:28,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:28,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:28,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627780801] [2023-11-23 21:28:28,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:28,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:28,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:28,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:28,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:28,604 INFO L87 Difference]: Start difference. First operand 1761 states and 2494 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:28:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:29,746 INFO L93 Difference]: Finished difference Result 4998 states and 7083 transitions. [2023-11-23 21:28:29,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:29,747 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 63 [2023-11-23 21:28:29,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:29,776 INFO L225 Difference]: With dead ends: 4998 [2023-11-23 21:28:29,776 INFO L226 Difference]: Without dead ends: 3254 [2023-11-23 21:28:29,786 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 21:28:29,787 INFO L413 NwaCegarLoop]: 1370 mSDtfsCounter, 1084 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:29,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1084 Valid, 2446 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:28:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3254 states. [2023-11-23 21:28:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 3232. [2023-11-23 21:28:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3232 states, 2007 states have (on average 1.3273542600896862) internal successors, (2664), 2110 states have internal predecessors, (2664), 952 states have call successors, (952), 275 states have call predecessors, (952), 272 states have return successors, (968), 908 states have call predecessors, (968), 946 states have call successors, (968) [2023-11-23 21:28:30,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3232 states to 3232 states and 4584 transitions. [2023-11-23 21:28:30,008 INFO L78 Accepts]: Start accepts. Automaton has 3232 states and 4584 transitions. Word has length 63 [2023-11-23 21:28:30,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:30,009 INFO L495 AbstractCegarLoop]: Abstraction has 3232 states and 4584 transitions. [2023-11-23 21:28:30,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:28:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3232 states and 4584 transitions. [2023-11-23 21:28:30,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 21:28:30,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:30,013 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 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 21:28:30,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:28:30,014 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:30,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:30,014 INFO L85 PathProgramCache]: Analyzing trace with hash 2023504754, now seen corresponding path program 1 times [2023-11-23 21:28:30,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:30,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755012188] [2023-11-23 21:28:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:30,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 21:28:31,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:31,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755012188] [2023-11-23 21:28:31,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755012188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:31,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:31,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:31,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460148086] [2023-11-23 21:28:31,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:31,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:31,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:31,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:31,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:31,449 INFO L87 Difference]: Start difference. First operand 3232 states and 4584 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:28:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:32,103 INFO L93 Difference]: Finished difference Result 3234 states and 4585 transitions. [2023-11-23 21:28:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:32,104 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2023-11-23 21:28:32,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:32,135 INFO L225 Difference]: With dead ends: 3234 [2023-11-23 21:28:32,135 INFO L226 Difference]: Without dead ends: 3231 [2023-11-23 21:28:32,138 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 21:28:32,139 INFO L413 NwaCegarLoop]: 1105 mSDtfsCounter, 1243 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:32,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1243 Valid, 1105 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:28:32,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3231 states. [2023-11-23 21:28:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3231 to 3231. [2023-11-23 21:28:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 2007 states have (on average 1.3268560039860489) internal successors, (2663), 2109 states have internal predecessors, (2663), 951 states have call successors, (951), 275 states have call predecessors, (951), 272 states have return successors, (968), 908 states have call predecessors, (968), 946 states have call successors, (968) [2023-11-23 21:28:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 4582 transitions. [2023-11-23 21:28:32,364 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 4582 transitions. Word has length 66 [2023-11-23 21:28:32,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:32,365 INFO L495 AbstractCegarLoop]: Abstraction has 3231 states and 4582 transitions. [2023-11-23 21:28:32,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:28:32,365 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 4582 transitions. [2023-11-23 21:28:32,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 21:28:32,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:32,368 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 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 21:28:32,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:28:32,368 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:32,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:32,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1696374222, now seen corresponding path program 1 times [2023-11-23 21:28:32,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:32,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560352920] [2023-11-23 21:28:32,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:32,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:33,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 21:28:33,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:33,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560352920] [2023-11-23 21:28:33,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560352920] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:33,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:33,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:33,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704114038] [2023-11-23 21:28:33,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:33,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:33,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:33,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:33,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:33,454 INFO L87 Difference]: Start difference. First operand 3231 states and 4582 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:28:34,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:34,118 INFO L93 Difference]: Finished difference Result 3233 states and 4583 transitions. [2023-11-23 21:28:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:34,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2023-11-23 21:28:34,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:34,148 INFO L225 Difference]: With dead ends: 3233 [2023-11-23 21:28:34,148 INFO L226 Difference]: Without dead ends: 3230 [2023-11-23 21:28:34,151 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 21:28:34,154 INFO L413 NwaCegarLoop]: 1103 mSDtfsCounter, 1240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:34,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1240 Valid, 1103 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:28:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3230 states. [2023-11-23 21:28:34,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3230 to 3230. [2023-11-23 21:28:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3230 states, 2007 states have (on average 1.3263577478824116) internal successors, (2662), 2108 states have internal predecessors, (2662), 950 states have call successors, (950), 275 states have call predecessors, (950), 272 states have return successors, (968), 908 states have call predecessors, (968), 946 states have call successors, (968) [2023-11-23 21:28:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3230 states to 3230 states and 4580 transitions. [2023-11-23 21:28:34,395 INFO L78 Accepts]: Start accepts. Automaton has 3230 states and 4580 transitions. Word has length 67 [2023-11-23 21:28:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:34,397 INFO L495 AbstractCegarLoop]: Abstraction has 3230 states and 4580 transitions. [2023-11-23 21:28:34,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:28:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 3230 states and 4580 transitions. [2023-11-23 21:28:34,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-23 21:28:34,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:34,402 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:28:34,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:28:34,402 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:34,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:34,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1048500619, now seen corresponding path program 1 times [2023-11-23 21:28:34,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:34,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165476558] [2023-11-23 21:28:34,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:34,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:35,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 21:28:35,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:35,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165476558] [2023-11-23 21:28:35,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165476558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:35,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:35,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:35,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654673916] [2023-11-23 21:28:35,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:35,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:35,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:35,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:35,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:35,583 INFO L87 Difference]: Start difference. First operand 3230 states and 4580 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:28:36,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:36,346 INFO L93 Difference]: Finished difference Result 3232 states and 4581 transitions. [2023-11-23 21:28:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:36,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 68 [2023-11-23 21:28:36,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:36,374 INFO L225 Difference]: With dead ends: 3232 [2023-11-23 21:28:36,374 INFO L226 Difference]: Without dead ends: 3229 [2023-11-23 21:28:36,377 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 21:28:36,378 INFO L413 NwaCegarLoop]: 1101 mSDtfsCounter, 1237 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:36,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1237 Valid, 1101 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:28:36,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2023-11-23 21:28:36,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 3229. [2023-11-23 21:28:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 2007 states have (on average 1.3258594917787743) internal successors, (2661), 2107 states have internal predecessors, (2661), 949 states have call successors, (949), 275 states have call predecessors, (949), 272 states have return successors, (968), 908 states have call predecessors, (968), 946 states have call successors, (968) [2023-11-23 21:28:36,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 4578 transitions. [2023-11-23 21:28:36,831 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 4578 transitions. Word has length 68 [2023-11-23 21:28:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:36,836 INFO L495 AbstractCegarLoop]: Abstraction has 3229 states and 4578 transitions. [2023-11-23 21:28:36,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:28:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 4578 transitions. [2023-11-23 21:28:36,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-23 21:28:36,839 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:36,840 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:28:36,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:28:36,841 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:36,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:36,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1855716757, now seen corresponding path program 1 times [2023-11-23 21:28:36,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:36,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843032740] [2023-11-23 21:28:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:36,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-11-23 21:28:37,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:37,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843032740] [2023-11-23 21:28:37,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843032740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:37,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:37,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:37,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170351616] [2023-11-23 21:28:37,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:37,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:37,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:37,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:37,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:37,959 INFO L87 Difference]: Start difference. First operand 3229 states and 4578 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:28:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:39,373 INFO L93 Difference]: Finished difference Result 9625 states and 13654 transitions. [2023-11-23 21:28:39,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:39,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2023-11-23 21:28:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:39,426 INFO L225 Difference]: With dead ends: 9625 [2023-11-23 21:28:39,427 INFO L226 Difference]: Without dead ends: 6408 [2023-11-23 21:28:39,445 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 21:28:39,446 INFO L413 NwaCegarLoop]: 1158 mSDtfsCounter, 1227 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1227 SdHoareTripleChecker+Valid, 2237 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:39,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1227 Valid, 2237 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-23 21:28:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6408 states. [2023-11-23 21:28:39,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6408 to 6399. [2023-11-23 21:28:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6399 states, 3977 states have (on average 1.3253708825748052) internal successors, (5271), 4174 states have internal predecessors, (5271), 1881 states have call successors, (1881), 547 states have call predecessors, (1881), 540 states have return successors, (1922), 1801 states have call predecessors, (1922), 1878 states have call successors, (1922) [2023-11-23 21:28:40,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6399 states to 6399 states and 9074 transitions. [2023-11-23 21:28:40,027 INFO L78 Accepts]: Start accepts. Automaton has 6399 states and 9074 transitions. Word has length 69 [2023-11-23 21:28:40,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:40,028 INFO L495 AbstractCegarLoop]: Abstraction has 6399 states and 9074 transitions. [2023-11-23 21:28:40,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:28:40,028 INFO L276 IsEmpty]: Start isEmpty. Operand 6399 states and 9074 transitions. [2023-11-23 21:28:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-23 21:28:40,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:40,046 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:40,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:28:40,046 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:40,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:40,047 INFO L85 PathProgramCache]: Analyzing trace with hash 457422714, now seen corresponding path program 1 times [2023-11-23 21:28:40,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:40,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500644760] [2023-11-23 21:28:40,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:40,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:40,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-23 21:28:41,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:41,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500644760] [2023-11-23 21:28:41,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500644760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:41,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:41,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:41,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869769773] [2023-11-23 21:28:41,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:41,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:41,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:41,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:41,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:41,050 INFO L87 Difference]: Start difference. First operand 6399 states and 9074 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 21:28:42,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:42,414 INFO L93 Difference]: Finished difference Result 12123 states and 17140 transitions. [2023-11-23 21:28:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 159 [2023-11-23 21:28:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:42,460 INFO L225 Difference]: With dead ends: 12123 [2023-11-23 21:28:42,460 INFO L226 Difference]: Without dead ends: 5741 [2023-11-23 21:28:42,490 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 21:28:42,491 INFO L413 NwaCegarLoop]: 1598 mSDtfsCounter, 911 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:42,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 2666 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:28:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5741 states. [2023-11-23 21:28:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5741 to 5729. [2023-11-23 21:28:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5729 states, 3548 states have (on average 1.3207440811724915) internal successors, (4686), 3730 states have internal predecessors, (4686), 1672 states have call successors, (1672), 515 states have call predecessors, (1672), 508 states have return successors, (1713), 1596 states have call predecessors, (1713), 1669 states have call successors, (1713) [2023-11-23 21:28:42,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5729 states to 5729 states and 8071 transitions. [2023-11-23 21:28:42,903 INFO L78 Accepts]: Start accepts. Automaton has 5729 states and 8071 transitions. Word has length 159 [2023-11-23 21:28:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:42,903 INFO L495 AbstractCegarLoop]: Abstraction has 5729 states and 8071 transitions. [2023-11-23 21:28:42,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2023-11-23 21:28:42,904 INFO L276 IsEmpty]: Start isEmpty. Operand 5729 states and 8071 transitions. [2023-11-23 21:28:42,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-23 21:28:42,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:42,917 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:28:42,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:28:42,917 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:42,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:42,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1856954368, now seen corresponding path program 1 times [2023-11-23 21:28:42,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:42,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309139046] [2023-11-23 21:28:42,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:42,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2023-11-23 21:28:44,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:44,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309139046] [2023-11-23 21:28:44,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309139046] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:44,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:44,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:28:44,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943971100] [2023-11-23 21:28:44,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:44,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:44,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:44,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:44,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:44,403 INFO L87 Difference]: Start difference. First operand 5729 states and 8071 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:28:46,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:46,023 INFO L93 Difference]: Finished difference Result 12260 states and 17514 transitions. [2023-11-23 21:28:46,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:28:46,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 171 [2023-11-23 21:28:46,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:46,091 INFO L225 Difference]: With dead ends: 12260 [2023-11-23 21:28:46,091 INFO L226 Difference]: Without dead ends: 6780 [2023-11-23 21:28:46,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:46,120 INFO L413 NwaCegarLoop]: 1423 mSDtfsCounter, 215 mSDsluCounter, 2584 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 4007 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:46,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 4007 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 21:28:46,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6780 states. [2023-11-23 21:28:46,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6780 to 5737. [2023-11-23 21:28:46,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5737 states, 3556 states have (on average 1.3200224971878516) internal successors, (4694), 3738 states have internal predecessors, (4694), 1672 states have call successors, (1672), 515 states have call predecessors, (1672), 508 states have return successors, (1713), 1596 states have call predecessors, (1713), 1669 states have call successors, (1713) [2023-11-23 21:28:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5737 states to 5737 states and 8079 transitions. [2023-11-23 21:28:46,695 INFO L78 Accepts]: Start accepts. Automaton has 5737 states and 8079 transitions. Word has length 171 [2023-11-23 21:28:46,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:46,697 INFO L495 AbstractCegarLoop]: Abstraction has 5737 states and 8079 transitions. [2023-11-23 21:28:46,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2023-11-23 21:28:46,697 INFO L276 IsEmpty]: Start isEmpty. Operand 5737 states and 8079 transitions. [2023-11-23 21:28:46,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-11-23 21:28:46,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:46,714 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:28:46,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:28:46,714 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:46,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1088980872, now seen corresponding path program 1 times [2023-11-23 21:28:46,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:46,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351806401] [2023-11-23 21:28:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2023-11-23 21:28:48,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:48,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351806401] [2023-11-23 21:28:48,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351806401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:28:48,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868690508] [2023-11-23 21:28:48,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:48,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:48,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:48,229 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:48,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:28:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:50,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 3280 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:28:50,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-23 21:28:50,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:50,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868690508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:50,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:28:50,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2023-11-23 21:28:50,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302235115] [2023-11-23 21:28:50,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:50,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:28:50,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:50,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:28:50,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:50,423 INFO L87 Difference]: Start difference. First operand 5737 states and 8079 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-23 21:28:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:52,163 INFO L93 Difference]: Finished difference Result 11245 states and 15861 transitions. [2023-11-23 21:28:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:28:52,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) Word has length 180 [2023-11-23 21:28:52,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:52,199 INFO L225 Difference]: With dead ends: 11245 [2023-11-23 21:28:52,199 INFO L226 Difference]: Without dead ends: 5757 [2023-11-23 21:28:52,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:52,231 INFO L413 NwaCegarLoop]: 1100 mSDtfsCounter, 1 mSDsluCounter, 3293 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4393 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:52,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4393 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-23 21:28:52,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5757 states. [2023-11-23 21:28:52,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5757 to 5753. [2023-11-23 21:28:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5753 states, 3568 states have (on average 1.3189461883408071) internal successors, (4706), 3750 states have internal predecessors, (4706), 1672 states have call successors, (1672), 515 states have call predecessors, (1672), 512 states have return successors, (1721), 1600 states have call predecessors, (1721), 1669 states have call successors, (1721) [2023-11-23 21:28:52,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5753 states to 5753 states and 8099 transitions. [2023-11-23 21:28:52,752 INFO L78 Accepts]: Start accepts. Automaton has 5753 states and 8099 transitions. Word has length 180 [2023-11-23 21:28:52,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:52,752 INFO L495 AbstractCegarLoop]: Abstraction has 5753 states and 8099 transitions. [2023-11-23 21:28:52,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 3 states have call predecessors, (20), 2 states have call successors, (20) [2023-11-23 21:28:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 5753 states and 8099 transitions. [2023-11-23 21:28:52,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2023-11-23 21:28:52,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:52,767 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:28:52,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:52,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c52b9d8-ec0a-43d1-abba-e553f954f491/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:52,994 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:52,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:52,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1336581071, now seen corresponding path program 1 times [2023-11-23 21:28:52,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:52,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841695812] [2023-11-23 21:28:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:52,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat