./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ --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 99f9870c0a11847528222b5446256dd4069d375e1dee3e428847b909838b4c1b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:50:11,064 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:50:11,195 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 04:50:11,203 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:50:11,204 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:50:11,247 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:50:11,248 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:50:11,248 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:50:11,249 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:50:11,255 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:50:11,255 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:50:11,257 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:50:11,257 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:50:11,259 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:50:11,260 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:50:11,260 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:50:11,261 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:50:11,261 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:50:11,262 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:50:11,262 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:50:11,263 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:50:11,263 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:50:11,265 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:50:11,265 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:50:11,266 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:50:11,266 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:50:11,267 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:50:11,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:50:11,268 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:50:11,268 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:50:11,269 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:50:11,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:50:11,270 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:50:11,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:50:11,271 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:50:11,271 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:50:11,271 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:50:11,272 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:50:11,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:50:11,272 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:50:11,272 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:50:11,273 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:50:11,273 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_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99f9870c0a11847528222b5446256dd4069d375e1dee3e428847b909838b4c1b [2023-11-19 04:50:11,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:50:11,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:50:11,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:50:11,632 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:50:11,632 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:50:11,634 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i [2023-11-19 04:50:15,133 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:50:15,872 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:50:15,874 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i [2023-11-19 04:50:15,921 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ/data/25dcf24ea/ab74281cf57d41c8a7d9f740406918a0/FLAGbe9cf09ab [2023-11-19 04:50:15,941 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ/data/25dcf24ea/ab74281cf57d41c8a7d9f740406918a0 [2023-11-19 04:50:15,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:50:15,947 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:50:15,949 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:50:15,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:50:15,957 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:50:15,958 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:50:15" (1/1) ... [2023-11-19 04:50:15,959 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56a6758a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:15, skipping insertion in model container [2023-11-19 04:50:15,959 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:50:15" (1/1) ... [2023-11-19 04:50:16,168 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:50:17,101 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_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i[164521,164534] [2023-11-19 04:50:17,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:50:17,887 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:50:18,031 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %2,%1\n\tsbb %0,%0": "=r" (oldbit), "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [5500-5501] [2023-11-19 04:50:18,042 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_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i[164521,164534] [2023-11-19 04:50:18,267 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:50:18,343 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:50:18,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:18 WrapperNode [2023-11-19 04:50:18,344 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:50:18,347 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:50:18,347 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:50:18,348 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:50:18,357 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:18" (1/1) ... [2023-11-19 04:50:18,468 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:18" (1/1) ... [2023-11-19 04:50:18,599 INFO L138 Inliner]: procedures = 157, calls = 723, calls flagged for inlining = 61, calls inlined = 52, statements flattened = 1627 [2023-11-19 04:50:18,599 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:50:18,600 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:50:18,600 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:50:18,600 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:50:18,611 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:18" (1/1) ... [2023-11-19 04:50:18,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:18" (1/1) ... [2023-11-19 04:50:18,623 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:18" (1/1) ... [2023-11-19 04:50:18,624 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:18" (1/1) ... [2023-11-19 04:50:18,724 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:18" (1/1) ... [2023-11-19 04:50:18,737 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:18" (1/1) ... [2023-11-19 04:50:18,752 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:18" (1/1) ... [2023-11-19 04:50:18,770 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:18" (1/1) ... [2023-11-19 04:50:18,791 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:50:18,792 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:50:18,792 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:50:18,792 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:50:18,793 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:18" (1/1) ... [2023-11-19 04:50:18,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:50:18,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:50:18,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:50:18,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bebb0711-b767-4a3b-83fa-f2b8fdc6832d/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:50:18,897 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_schedule_event [2023-11-19 04:50:18,898 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_schedule_event [2023-11-19 04:50:18,898 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_freebcshw [2023-11-19 04:50:18,898 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_freebcshw [2023-11-19 04:50:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_set_modem_ctrl [2023-11-19 04:50:18,899 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_set_modem_ctrl [2023-11-19 04:50:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 04:50:18,899 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-11-19 04:50:18,902 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-11-19 04:50:18,902 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2023-11-19 04:50:18,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2023-11-19 04:50:18,903 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_reinitbcshw [2023-11-19 04:50:18,903 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_reinitbcshw [2023-11-19 04:50:18,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-19 04:50:18,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-19 04:50:18,904 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 04:50:18,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 04:50:18,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:50:18,904 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_m10x_send_skb [2023-11-19 04:50:18,905 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_m10x_send_skb [2023-11-19 04:50:18,905 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_brkchars [2023-11-19 04:50:18,906 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_brkchars [2023-11-19 04:50:18,906 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2023-11-19 04:50:18,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2023-11-19 04:50:18,907 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_add_event [2023-11-19 04:50:18,907 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_add_event [2023-11-19 04:50:18,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-19 04:50:18,909 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-19 04:50:18,909 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-19 04:50:18,909 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-19 04:50:18,910 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 04:50:18,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 04:50:18,911 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2023-11-19 04:50:18,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2023-11-19 04:50:18,911 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_close_bchannel [2023-11-19 04:50:18,911 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_close_bchannel [2023-11-19 04:50:18,912 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_resume [2023-11-19 04:50:18,912 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_resume [2023-11-19 04:50:18,912 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-19 04:50:18,912 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-19 04:50:18,913 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_baud_rate [2023-11-19 04:50:18,913 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_baud_rate [2023-11-19 04:50:18,913 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_initcshw [2023-11-19 04:50:18,913 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_initcshw [2023-11-19 04:50:18,913 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-19 04:50:18,914 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-19 04:50:18,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:50:18,914 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 04:50:18,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 04:50:18,914 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-19 04:50:18,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-19 04:50:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_initbcshw [2023-11-19 04:50:18,915 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_initbcshw [2023-11-19 04:50:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_dbg_buffer [2023-11-19 04:50:18,915 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_dbg_buffer [2023-11-19 04:50:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:50:18,916 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:50:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_set_line_ctrl [2023-11-19 04:50:18,916 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_set_line_ctrl [2023-11-19 04:50:18,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:50:18,917 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2023-11-19 04:50:18,918 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2023-11-19 04:50:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_kill [2023-11-19 04:50:18,919 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_kill [2023-11-19 04:50:18,920 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-19 04:50:18,921 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-19 04:50:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_freecs [2023-11-19 04:50:18,921 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_freecs [2023-11-19 04:50:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:50:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_write_room [2023-11-19 04:50:18,922 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_write_room [2023-11-19 04:50:18,922 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_suspend [2023-11-19 04:50:18,922 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_suspend [2023-11-19 04:50:18,923 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-19 04:50:18,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-19 04:50:18,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:50:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:50:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_dev [2023-11-19 04:50:18,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_dev [2023-11-19 04:50:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-19 04:50:18,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-19 04:50:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_8 [2023-11-19 04:50:18,926 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_8 [2023-11-19 04:50:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:50:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2023-11-19 04:50:18,926 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2023-11-19 04:50:18,927 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-11-19 04:50:18,928 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-11-19 04:50:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_freedriver [2023-11-19 04:50:18,928 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_freedriver [2023-11-19 04:50:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_disconnect [2023-11-19 04:50:18,929 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_disconnect [2023-11-19 04:50:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure dev_notice [2023-11-19 04:50:18,929 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_notice [2023-11-19 04:50:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_chars_in_buffer [2023-11-19 04:50:18,930 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_chars_in_buffer [2023-11-19 04:50:18,930 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-19 04:50:18,931 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-19 04:50:18,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:50:18,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:50:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_17 [2023-11-19 04:50:18,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_17 [2023-11-19 04:50:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 04:50:18,932 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 04:50:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_m10x_input [2023-11-19 04:50:18,933 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_m10x_input [2023-11-19 04:50:18,933 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-19 04:50:18,933 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-19 04:50:18,933 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-19 04:50:18,933 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-19 04:50:18,933 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-19 04:50:18,935 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-19 04:50:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure set_value [2023-11-19 04:50:18,935 INFO L138 BoogieDeclarations]: Found implementation of procedure set_value [2023-11-19 04:50:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure tiocm_to_gigaset [2023-11-19 04:50:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure tiocm_to_gigaset [2023-11-19 04:50:18,936 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2023-11-19 04:50:18,937 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2023-11-19 04:50:18,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:50:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-19 04:50:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-19 04:50:18,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-19 04:50:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_init_bchannel [2023-11-19 04:50:18,938 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_init_bchannel [2023-11-19 04:50:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:50:18,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:50:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_read_int_callback [2023-11-19 04:50:18,939 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_read_int_callback [2023-11-19 04:50:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_freecshw [2023-11-19 04:50:18,940 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_freecshw [2023-11-19 04:50:19,558 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:50:19,567 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:50:19,861 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 04:50:20,939 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2023-11-19 04:50:22,973 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:50:23,757 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:50:23,757 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:50:23,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:50:23 BoogieIcfgContainer [2023-11-19 04:50:23,775 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:50:23,779 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:50:23,779 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:50:23,782 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:50:23,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:50:15" (1/3) ... [2023-11-19 04:50:23,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd54538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:50:23, skipping insertion in model container [2023-11-19 04:50:23,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:50:18" (2/3) ... [2023-11-19 04:50:23,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fd54538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:50:23, skipping insertion in model container [2023-11-19 04:50:23,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:50:23" (3/3) ... [2023-11-19 04:50:23,788 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i [2023-11-19 04:50:23,811 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:50:23,814 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:50:23,908 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:50:23,917 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;@64829188, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:50:23,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:50:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 682 states, 425 states have (on average 1.3764705882352941) internal successors, (585), 449 states have internal predecessors, (585), 200 states have call successors, (200), 57 states have call predecessors, (200), 55 states have return successors, (194), 189 states have call predecessors, (194), 194 states have call successors, (194) [2023-11-19 04:50:23,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 04:50:23,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:23,965 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:23,966 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:23,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:23,977 INFO L85 PathProgramCache]: Analyzing trace with hash -403152692, now seen corresponding path program 1 times [2023-11-19 04:50:23,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:23,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112666320] [2023-11-19 04:50:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:23,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 04:50:24,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:24,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112666320] [2023-11-19 04:50:24,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112666320] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:24,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:24,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:50:24,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255045650] [2023-11-19 04:50:24,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:24,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:50:24,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:25,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:50:25,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:25,034 INFO L87 Difference]: Start difference. First operand has 682 states, 425 states have (on average 1.3764705882352941) internal successors, (585), 449 states have internal predecessors, (585), 200 states have call successors, (200), 57 states have call predecessors, (200), 55 states have return successors, (194), 189 states have call predecessors, (194), 194 states have call successors, (194) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 04:50:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:27,564 INFO L93 Difference]: Finished difference Result 1982 states and 2841 transitions. [2023-11-19 04:50:27,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:50:27,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2023-11-19 04:50:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:27,612 INFO L225 Difference]: With dead ends: 1982 [2023-11-19 04:50:27,612 INFO L226 Difference]: Without dead ends: 1294 [2023-11-19 04:50:27,626 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 [2023-11-19 04:50:27,637 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 915 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:27,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 1726 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-19 04:50:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2023-11-19 04:50:27,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1294. [2023-11-19 04:50:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 815 states have (on average 1.3570552147239263) internal successors, (1106), 842 states have internal predecessors, (1106), 370 states have call successors, (370), 109 states have call predecessors, (370), 108 states have return successors, (365), 355 states have call predecessors, (365), 365 states have call successors, (365) [2023-11-19 04:50:27,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1841 transitions. [2023-11-19 04:50:27,905 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1841 transitions. Word has length 48 [2023-11-19 04:50:27,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:27,906 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 1841 transitions. [2023-11-19 04:50:27,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 04:50:27,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1841 transitions. [2023-11-19 04:50:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 04:50:27,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:27,912 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:27,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:50:27,913 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:27,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:27,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1217575818, now seen corresponding path program 1 times [2023-11-19 04:50:27,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:27,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603846300] [2023-11-19 04:50:27,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:27,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 04:50:28,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:28,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603846300] [2023-11-19 04:50:28,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603846300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:28,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:28,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:50:28,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085089243] [2023-11-19 04:50:28,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:28,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:50:28,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:28,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:50:28,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:28,448 INFO L87 Difference]: Start difference. First operand 1294 states and 1841 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2023-11-19 04:50:30,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:30,162 INFO L93 Difference]: Finished difference Result 2530 states and 3591 transitions. [2023-11-19 04:50:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:50:30,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 55 [2023-11-19 04:50:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:30,186 INFO L225 Difference]: With dead ends: 2530 [2023-11-19 04:50:30,186 INFO L226 Difference]: Without dead ends: 2527 [2023-11-19 04:50:30,188 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 [2023-11-19 04:50:30,192 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 887 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:30,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [887 Valid, 1702 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 04:50:30,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2023-11-19 04:50:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2515. [2023-11-19 04:50:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2515 states, 1588 states have (on average 1.3570528967254407) internal successors, (2155), 1638 states have internal predecessors, (2155), 712 states have call successors, (712), 217 states have call predecessors, (712), 214 states have return successors, (707), 683 states have call predecessors, (707), 707 states have call successors, (707) [2023-11-19 04:50:30,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2515 states to 2515 states and 3574 transitions. [2023-11-19 04:50:30,418 INFO L78 Accepts]: Start accepts. Automaton has 2515 states and 3574 transitions. Word has length 55 [2023-11-19 04:50:30,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:30,420 INFO L495 AbstractCegarLoop]: Abstraction has 2515 states and 3574 transitions. [2023-11-19 04:50:30,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2023-11-19 04:50:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states and 3574 transitions. [2023-11-19 04:50:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 04:50:30,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:30,426 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:30,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:50:30,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:30,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:30,437 INFO L85 PathProgramCache]: Analyzing trace with hash -910346168, now seen corresponding path program 1 times [2023-11-19 04:50:30,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:30,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788745477] [2023-11-19 04:50:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:30,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 04:50:30,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:30,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788745477] [2023-11-19 04:50:30,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788745477] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:30,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:30,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:50:30,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582214272] [2023-11-19 04:50:30,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:30,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:50:30,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:30,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:50:30,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:30,944 INFO L87 Difference]: Start difference. First operand 2515 states and 3574 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2023-11-19 04:50:32,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:32,532 INFO L93 Difference]: Finished difference Result 6188 states and 8784 transitions. [2023-11-19 04:50:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:50:32,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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 56 [2023-11-19 04:50:32,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:32,563 INFO L225 Difference]: With dead ends: 6188 [2023-11-19 04:50:32,563 INFO L226 Difference]: Without dead ends: 3685 [2023-11-19 04:50:32,574 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 [2023-11-19 04:50:32,575 INFO L413 NwaCegarLoop]: 858 mSDtfsCounter, 838 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 1700 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:32,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 1700 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 04:50:32,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3685 states. [2023-11-19 04:50:32,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3685 to 3675. [2023-11-19 04:50:32,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3675 states, 2328 states have (on average 1.3603951890034365) internal successors, (3167), 2401 states have internal predecessors, (3167), 1026 states have call successors, (1026), 323 states have call predecessors, (1026), 320 states have return successors, (1021), 985 states have call predecessors, (1021), 1021 states have call successors, (1021) [2023-11-19 04:50:32,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 5214 transitions. [2023-11-19 04:50:32,886 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 5214 transitions. Word has length 56 [2023-11-19 04:50:32,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:32,888 INFO L495 AbstractCegarLoop]: Abstraction has 3675 states and 5214 transitions. [2023-11-19 04:50:32,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 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) [2023-11-19 04:50:32,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 5214 transitions. [2023-11-19 04:50:32,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-19 04:50:32,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:32,898 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:32,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:50:32,899 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:32,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:32,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1843553869, now seen corresponding path program 1 times [2023-11-19 04:50:32,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:32,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021846415] [2023-11-19 04:50:32,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:32,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 04:50:33,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:33,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021846415] [2023-11-19 04:50:33,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021846415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:33,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:33,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:50:33,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075347220] [2023-11-19 04:50:33,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:33,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:50:33,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:33,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:50:33,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:33,193 INFO L87 Difference]: Start difference. First operand 3675 states and 5214 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2023-11-19 04:50:34,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:34,792 INFO L93 Difference]: Finished difference Result 4825 states and 6863 transitions. [2023-11-19 04:50:34,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:50:34,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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 57 [2023-11-19 04:50:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:34,829 INFO L225 Difference]: With dead ends: 4825 [2023-11-19 04:50:34,829 INFO L226 Difference]: Without dead ends: 4822 [2023-11-19 04:50:34,833 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 [2023-11-19 04:50:34,834 INFO L413 NwaCegarLoop]: 859 mSDtfsCounter, 824 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 824 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:34,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 1701 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 04:50:34,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4822 states. [2023-11-19 04:50:35,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4822 to 4812. [2023-11-19 04:50:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4812 states, 3055 states have (on average 1.3636661211129297) internal successors, (4166), 3155 states have internal predecessors, (4166), 1336 states have call successors, (1336), 425 states have call predecessors, (1336), 420 states have return successors, (1347), 1277 states have call predecessors, (1347), 1331 states have call successors, (1347) [2023-11-19 04:50:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4812 states to 4812 states and 6849 transitions. [2023-11-19 04:50:35,352 INFO L78 Accepts]: Start accepts. Automaton has 4812 states and 6849 transitions. Word has length 57 [2023-11-19 04:50:35,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:35,352 INFO L495 AbstractCegarLoop]: Abstraction has 4812 states and 6849 transitions. [2023-11-19 04:50:35,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2023-11-19 04:50:35,353 INFO L276 IsEmpty]: Start isEmpty. Operand 4812 states and 6849 transitions. [2023-11-19 04:50:35,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-19 04:50:35,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:35,357 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:35,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:50:35,357 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:35,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:35,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1315113963, now seen corresponding path program 1 times [2023-11-19 04:50:35,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:35,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039075575] [2023-11-19 04:50:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:35,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 04:50:35,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:35,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039075575] [2023-11-19 04:50:35,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039075575] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:35,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:35,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:50:35,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865812797] [2023-11-19 04:50:35,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:35,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:50:35,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:35,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:50:35,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:35,581 INFO L87 Difference]: Start difference. First operand 4812 states and 6849 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2023-11-19 04:50:36,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:36,784 INFO L93 Difference]: Finished difference Result 4814 states and 6850 transitions. [2023-11-19 04:50:36,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:50:36,785 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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 58 [2023-11-19 04:50:36,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:36,826 INFO L225 Difference]: With dead ends: 4814 [2023-11-19 04:50:36,826 INFO L226 Difference]: Without dead ends: 4811 [2023-11-19 04:50:36,830 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 [2023-11-19 04:50:36,831 INFO L413 NwaCegarLoop]: 857 mSDtfsCounter, 924 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:36,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 857 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 04:50:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2023-11-19 04:50:37,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 4811. [2023-11-19 04:50:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 3055 states have (on average 1.3633387888707038) internal successors, (4165), 3154 states have internal predecessors, (4165), 1335 states have call successors, (1335), 425 states have call predecessors, (1335), 420 states have return successors, (1347), 1277 states have call predecessors, (1347), 1331 states have call successors, (1347) [2023-11-19 04:50:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 6847 transitions. [2023-11-19 04:50:37,239 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 6847 transitions. Word has length 58 [2023-11-19 04:50:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:37,240 INFO L495 AbstractCegarLoop]: Abstraction has 4811 states and 6847 transitions. [2023-11-19 04:50:37,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2023-11-19 04:50:37,240 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 6847 transitions. [2023-11-19 04:50:37,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-19 04:50:37,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:37,243 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:37,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:50:37,244 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:37,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:37,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2113350928, now seen corresponding path program 1 times [2023-11-19 04:50:37,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:37,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773752480] [2023-11-19 04:50:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:37,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-19 04:50:37,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:37,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773752480] [2023-11-19 04:50:37,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773752480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:37,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:37,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:50:37,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591185814] [2023-11-19 04:50:37,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:37,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:50:37,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:37,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:50:37,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:37,624 INFO L87 Difference]: Start difference. First operand 4811 states and 6847 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-11-19 04:50:38,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:38,666 INFO L93 Difference]: Finished difference Result 4813 states and 6848 transitions. [2023-11-19 04:50:38,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:50:38,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 59 [2023-11-19 04:50:38,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:38,707 INFO L225 Difference]: With dead ends: 4813 [2023-11-19 04:50:38,707 INFO L226 Difference]: Without dead ends: 4798 [2023-11-19 04:50:38,711 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 [2023-11-19 04:50:38,712 INFO L413 NwaCegarLoop]: 856 mSDtfsCounter, 921 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:38,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 856 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 04:50:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2023-11-19 04:50:39,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4798. [2023-11-19 04:50:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4798 states, 3045 states have (on average 1.3628899835796386) internal successors, (4150), 3143 states have internal predecessors, (4150), 1333 states have call successors, (1333), 424 states have call predecessors, (1333), 419 states have return successors, (1346), 1276 states have call predecessors, (1346), 1330 states have call successors, (1346) [2023-11-19 04:50:39,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 6829 transitions. [2023-11-19 04:50:39,185 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 6829 transitions. Word has length 59 [2023-11-19 04:50:39,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:39,186 INFO L495 AbstractCegarLoop]: Abstraction has 4798 states and 6829 transitions. [2023-11-19 04:50:39,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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) [2023-11-19 04:50:39,187 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 6829 transitions. [2023-11-19 04:50:39,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-19 04:50:39,197 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:39,197 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 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] [2023-11-19 04:50:39,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:50:39,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:39,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:39,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1064678820, now seen corresponding path program 1 times [2023-11-19 04:50:39,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:39,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356417421] [2023-11-19 04:50:39,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:39,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:39,449 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-19 04:50:39,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:39,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356417421] [2023-11-19 04:50:39,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356417421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:39,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:39,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:50:39,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475667484] [2023-11-19 04:50:39,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:39,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:50:39,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:50:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:39,453 INFO L87 Difference]: Start difference. First operand 4798 states and 6829 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-11-19 04:50:41,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:41,545 INFO L93 Difference]: Finished difference Result 12300 states and 17429 transitions. [2023-11-19 04:50:41,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:50:41,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 118 [2023-11-19 04:50:41,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:41,637 INFO L225 Difference]: With dead ends: 12300 [2023-11-19 04:50:41,638 INFO L226 Difference]: Without dead ends: 7514 [2023-11-19 04:50:41,661 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 [2023-11-19 04:50:41,663 INFO L413 NwaCegarLoop]: 873 mSDtfsCounter, 511 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:41,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 1694 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 04:50:41,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7514 states. [2023-11-19 04:50:42,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7514 to 7494. [2023-11-19 04:50:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7494 states, 4801 states have (on average 1.3753384711518433) internal successors, (6603), 4919 states have internal predecessors, (6603), 1985 states have call successors, (1985), 712 states have call predecessors, (1985), 707 states have return successors, (1998), 1928 states have call predecessors, (1998), 1982 states have call successors, (1998) [2023-11-19 04:50:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7494 states to 7494 states and 10586 transitions. [2023-11-19 04:50:42,369 INFO L78 Accepts]: Start accepts. Automaton has 7494 states and 10586 transitions. Word has length 118 [2023-11-19 04:50:42,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:42,371 INFO L495 AbstractCegarLoop]: Abstraction has 7494 states and 10586 transitions. [2023-11-19 04:50:42,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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) [2023-11-19 04:50:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 7494 states and 10586 transitions. [2023-11-19 04:50:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-19 04:50:42,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:42,389 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:42,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:50:42,390 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:42,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:42,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1249614654, now seen corresponding path program 1 times [2023-11-19 04:50:42,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:42,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801140993] [2023-11-19 04:50:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:42,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-19 04:50:42,763 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:42,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801140993] [2023-11-19 04:50:42,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801140993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:42,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:42,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:50:42,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39036514] [2023-11-19 04:50:42,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:42,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:50:42,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:42,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:50:42,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:50:42,766 INFO L87 Difference]: Start difference. First operand 7494 states and 10586 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 04:50:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:45,454 INFO L93 Difference]: Finished difference Result 16489 states and 23657 transitions. [2023-11-19 04:50:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:50:45,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 146 [2023-11-19 04:50:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:45,504 INFO L225 Difference]: With dead ends: 16489 [2023-11-19 04:50:45,504 INFO L226 Difference]: Without dead ends: 9007 [2023-11-19 04:50:45,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:50:45,535 INFO L413 NwaCegarLoop]: 1178 mSDtfsCounter, 1239 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 2125 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:45,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1239 Valid, 2125 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-19 04:50:45,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9007 states. [2023-11-19 04:50:46,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9007 to 7502. [2023-11-19 04:50:46,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7502 states, 4809 states have (on average 1.3734664171345394) internal successors, (6605), 4927 states have internal predecessors, (6605), 1985 states have call successors, (1985), 712 states have call predecessors, (1985), 707 states have return successors, (1998), 1928 states have call predecessors, (1998), 1982 states have call successors, (1998) [2023-11-19 04:50:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 10588 transitions. [2023-11-19 04:50:46,337 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 10588 transitions. Word has length 146 [2023-11-19 04:50:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:46,338 INFO L495 AbstractCegarLoop]: Abstraction has 7502 states and 10588 transitions. [2023-11-19 04:50:46,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2023-11-19 04:50:46,339 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 10588 transitions. [2023-11-19 04:50:46,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-19 04:50:46,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:46,359 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:50:46,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:50:46,359 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:46,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:46,360 INFO L85 PathProgramCache]: Analyzing trace with hash 634380064, now seen corresponding path program 1 times [2023-11-19 04:50:46,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:46,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249260697] [2023-11-19 04:50:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:46,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:46,707 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-19 04:50:46,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:46,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249260697] [2023-11-19 04:50:46,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249260697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:46,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:46,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:50:46,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38322708] [2023-11-19 04:50:46,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:46,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:50:46,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:46,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:50:46,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:46,712 INFO L87 Difference]: Start difference. First operand 7502 states and 10588 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-19 04:50:50,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:50:50,577 INFO L93 Difference]: Finished difference Result 18765 states and 26462 transitions. [2023-11-19 04:50:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:50:50,578 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 148 [2023-11-19 04:50:50,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:50:50,630 INFO L225 Difference]: With dead ends: 18765 [2023-11-19 04:50:50,630 INFO L226 Difference]: Without dead ends: 11275 [2023-11-19 04:50:50,660 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 [2023-11-19 04:50:50,663 INFO L413 NwaCegarLoop]: 1652 mSDtfsCounter, 909 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 2487 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:50:50,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 2487 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-19 04:50:50,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2023-11-19 04:50:51,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 11241. [2023-11-19 04:50:51,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11241 states, 7195 states have (on average 1.3740097289784572) internal successors, (9886), 7375 states have internal predecessors, (9886), 2972 states have call successors, (2972), 1080 states have call predecessors, (2972), 1073 states have return successors, (2993), 2880 states have call predecessors, (2993), 2969 states have call successors, (2993) [2023-11-19 04:50:52,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11241 states to 11241 states and 15851 transitions. [2023-11-19 04:50:52,006 INFO L78 Accepts]: Start accepts. Automaton has 11241 states and 15851 transitions. Word has length 148 [2023-11-19 04:50:52,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:50:52,006 INFO L495 AbstractCegarLoop]: Abstraction has 11241 states and 15851 transitions. [2023-11-19 04:50:52,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-19 04:50:52,007 INFO L276 IsEmpty]: Start isEmpty. Operand 11241 states and 15851 transitions. [2023-11-19 04:50:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-19 04:50:52,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:50:52,032 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 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] [2023-11-19 04:50:52,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 04:50:52,032 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:50:52,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:50:52,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1351657601, now seen corresponding path program 1 times [2023-11-19 04:50:52,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:50:52,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108620409] [2023-11-19 04:50:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:50:52,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:50:52,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:50:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-11-19 04:50:52,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:50:52,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108620409] [2023-11-19 04:50:52,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108620409] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:50:52,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:50:52,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:50:52,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941048003] [2023-11-19 04:50:52,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:50:52,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:50:52,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:50:52,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:50:52,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:50:52,404 INFO L87 Difference]: Start difference. First operand 11241 states and 15851 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24)