./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 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire/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_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 99f9870c0a11847528222b5446256dd4069d375e1dee3e428847b909838b4c1b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:22:15,817 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:22:15,911 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:22:15,934 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:22:15,935 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:22:15,985 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:22:15,986 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:22:15,987 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:22:15,988 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:22:15,993 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:22:15,994 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:22:15,995 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:22:15,995 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:22:15,997 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:22:15,998 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:22:15,998 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:22:15,999 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:22:15,999 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:22:15,999 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:22:16,000 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:22:16,001 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:22:16,002 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:22:16,003 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:22:16,003 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:22:16,004 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:22:16,004 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:22:16,005 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:22:16,005 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:22:16,005 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:22:16,006 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:22:16,007 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:22:16,008 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:22:16,008 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:22:16,008 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:22:16,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:22:16,009 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:22:16,009 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:22:16,009 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:22:16,009 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:22:16,010 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:22:16,010 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:22:16,011 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:22:16,011 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:22:16,011 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:22:16,012 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_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99f9870c0a11847528222b5446256dd4069d375e1dee3e428847b909838b4c1b [2023-11-23 21:22:16,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:22:16,392 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:22:16,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:22:16,396 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:22:16,397 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:22:16,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire/../../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 [2023-11-23 21:22:19,575 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:22:20,184 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:22:20,185 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/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 [2023-11-23 21:22:20,226 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire/data/4fb9beb9e/f95dab85541a47e2ba8e48e99540de7a/FLAGc1139ca68 [2023-11-23 21:22:20,244 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire/data/4fb9beb9e/f95dab85541a47e2ba8e48e99540de7a [2023-11-23 21:22:20,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:22:20,252 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:22:20,254 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:22:20,254 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:22:20,260 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:22:20,261 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:20" (1/1) ... [2023-11-23 21:22:20,262 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2918f5c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:20, skipping insertion in model container [2023-11-23 21:22:20,262 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:20" (1/1) ... [2023-11-23 21:22:20,438 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:22:21,346 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_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/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] [2023-11-23 21:22:21,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:22:21,818 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:22:22,085 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] [2023-11-23 21:22:22,105 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_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/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] [2023-11-23 21:22:22,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:22:22,390 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:22:22,391 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:22 WrapperNode [2023-11-23 21:22:22,391 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:22:22,392 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:22:22,393 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:22:22,393 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:22:22,402 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:22" (1/1) ... [2023-11-23 21:22:22,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:22" (1/1) ... [2023-11-23 21:22:22,582 INFO L138 Inliner]: procedures = 157, calls = 723, calls flagged for inlining = 61, calls inlined = 52, statements flattened = 1627 [2023-11-23 21:22:22,582 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:22:22,583 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:22:22,583 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:22:22,583 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:22:22,593 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:22" (1/1) ... [2023-11-23 21:22:22,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:22" (1/1) ... [2023-11-23 21:22:22,605 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:22" (1/1) ... [2023-11-23 21:22:22,606 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:22" (1/1) ... [2023-11-23 21:22:22,674 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:22" (1/1) ... [2023-11-23 21:22:22,695 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:22" (1/1) ... [2023-11-23 21:22:22,736 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:22" (1/1) ... [2023-11-23 21:22:22,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:22" (1/1) ... [2023-11-23 21:22:22,789 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:22:22,790 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:22:22,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:22:22,791 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:22:22,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:22" (1/1) ... [2023-11-23 21:22:22,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:22:22,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:22:22,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:22:22,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bef8aff6-dd61-46a4-8f01-8e3dbd5d8a0e/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:22:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_schedule_event [2023-11-23 21:22:22,873 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_schedule_event [2023-11-23 21:22:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_freebcshw [2023-11-23 21:22:22,874 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_freebcshw [2023-11-23 21:22:22,874 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_set_modem_ctrl [2023-11-23 21:22:22,874 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_set_modem_ctrl [2023-11-23 21:22:22,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:22:22,877 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-11-23 21:22:22,877 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-11-23 21:22:22,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_2 [2023-11-23 21:22:22,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_2 [2023-11-23 21:22:22,877 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_reinitbcshw [2023-11-23 21:22:22,877 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_reinitbcshw [2023-11-23 21:22:22,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:22:22,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:22:22,878 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:22:22,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:22:22,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:22:22,879 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_m10x_send_skb [2023-11-23 21:22:22,879 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_m10x_send_skb [2023-11-23 21:22:22,879 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_brkchars [2023-11-23 21:22:22,879 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_brkchars [2023-11-23 21:22:22,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2023-11-23 21:22:22,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2023-11-23 21:22:22,881 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_add_event [2023-11-23 21:22:22,881 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_add_event [2023-11-23 21:22:22,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:22:22,881 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:22:22,882 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-23 21:22:22,882 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-23 21:22:22,882 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:22:22,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:22:22,883 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2023-11-23 21:22:22,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2023-11-23 21:22:22,884 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_close_bchannel [2023-11-23 21:22:22,884 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_close_bchannel [2023-11-23 21:22:22,884 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_resume [2023-11-23 21:22:22,884 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_resume [2023-11-23 21:22:22,884 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-23 21:22:22,885 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-23 21:22:22,885 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_baud_rate [2023-11-23 21:22:22,885 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_baud_rate [2023-11-23 21:22:22,885 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_initcshw [2023-11-23 21:22:22,885 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_initcshw [2023-11-23 21:22:22,885 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:22:22,885 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:22:22,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:22:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:22:22,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:22:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:22:22,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:22:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_initbcshw [2023-11-23 21:22:22,886 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_initbcshw [2023-11-23 21:22:22,886 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_dbg_buffer [2023-11-23 21:22:22,887 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_dbg_buffer [2023-11-23 21:22:22,887 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:22:22,887 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:22:22,887 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_set_line_ctrl [2023-11-23 21:22:22,888 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_set_line_ctrl [2023-11-23 21:22:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:22:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2023-11-23 21:22:22,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2023-11-23 21:22:22,890 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_kill [2023-11-23 21:22:22,890 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_kill [2023-11-23 21:22:22,890 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 21:22:22,890 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 21:22:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_freecs [2023-11-23 21:22:22,891 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_freecs [2023-11-23 21:22:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:22:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_write_room [2023-11-23 21:22:22,891 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_write_room [2023-11-23 21:22:22,891 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_suspend [2023-11-23 21:22:22,891 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_suspend [2023-11-23 21:22:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-23 21:22:22,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-23 21:22:22,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:22:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:22:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_dev [2023-11-23 21:22:22,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_dev [2023-11-23 21:22:22,893 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:22:22,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 21:22:22,894 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_8 [2023-11-23 21:22:22,894 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_8 [2023-11-23 21:22:22,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:22:22,894 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2023-11-23 21:22:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2023-11-23 21:22:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2023-11-23 21:22:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2023-11-23 21:22:22,895 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_freedriver [2023-11-23 21:22:22,895 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_freedriver [2023-11-23 21:22:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_disconnect [2023-11-23 21:22:22,896 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_disconnect [2023-11-23 21:22:22,896 INFO L130 BoogieDeclarations]: Found specification of procedure dev_notice [2023-11-23 21:22:22,896 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_notice [2023-11-23 21:22:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_chars_in_buffer [2023-11-23 21:22:22,897 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_chars_in_buffer [2023-11-23 21:22:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 21:22:22,897 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 21:22:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:22:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:22:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_17 [2023-11-23 21:22:22,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_17 [2023-11-23 21:22:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:22:22,898 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:22:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_m10x_input [2023-11-23 21:22:22,898 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_m10x_input [2023-11-23 21:22:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-23 21:22:22,898 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-23 21:22:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-23 21:22:22,899 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-23 21:22:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-23 21:22:22,899 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-23 21:22:22,900 INFO L130 BoogieDeclarations]: Found specification of procedure set_value [2023-11-23 21:22:22,900 INFO L138 BoogieDeclarations]: Found implementation of procedure set_value [2023-11-23 21:22:22,900 INFO L130 BoogieDeclarations]: Found specification of procedure tiocm_to_gigaset [2023-11-23 21:22:22,901 INFO L138 BoogieDeclarations]: Found implementation of procedure tiocm_to_gigaset [2023-11-23 21:22:22,901 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2023-11-23 21:22:22,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2023-11-23 21:22:22,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:22:22,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:22:22,901 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-23 21:22:22,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-23 21:22:22,902 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_init_bchannel [2023-11-23 21:22:22,902 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_init_bchannel [2023-11-23 21:22:22,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:22:22,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:22:22,902 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_read_int_callback [2023-11-23 21:22:22,902 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_read_int_callback [2023-11-23 21:22:22,902 INFO L130 BoogieDeclarations]: Found specification of procedure gigaset_freecshw [2023-11-23 21:22:22,902 INFO L138 BoogieDeclarations]: Found implementation of procedure gigaset_freecshw [2023-11-23 21:22:23,519 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:22:23,524 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:22:23,936 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:22:24,873 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2023-11-23 21:22:26,219 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:22:26,938 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:22:26,938 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:22:26,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:22:26 BoogieIcfgContainer [2023-11-23 21:22:26,941 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:22:26,947 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:22:26,947 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:22:26,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:22:26,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:22:20" (1/3) ... [2023-11-23 21:22:26,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76fdba28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:22:26, skipping insertion in model container [2023-11-23 21:22:26,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:22" (2/3) ... [2023-11-23 21:22:26,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76fdba28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:22:26, skipping insertion in model container [2023-11-23 21:22:26,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:22:26" (3/3) ... [2023-11-23 21:22:26,963 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--isdn--gigaset--usb_gigaset.ko-entry_point.cil.out.i [2023-11-23 21:22:26,992 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:22:26,992 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:22:27,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:22:27,102 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;@7ebef16e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:22:27,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:22:27,114 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) [2023-11-23 21:22:27,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 21:22:27,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:27,148 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] [2023-11-23 21:22:27,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:27,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:27,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1235447954, now seen corresponding path program 1 times [2023-11-23 21:22:27,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:27,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353955388] [2023-11-23 21:22:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:27,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:22:28,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:28,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353955388] [2023-11-23 21:22:28,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353955388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:28,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:28,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:22:28,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281897641] [2023-11-23 21:22:28,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:28,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:22:28,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:28,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:22:28,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:28,140 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) [2023-11-23 21:22:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:30,064 INFO L93 Difference]: Finished difference Result 1982 states and 2841 transitions. [2023-11-23 21:22:30,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:22:30,070 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 [2023-11-23 21:22:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:30,108 INFO L225 Difference]: With dead ends: 1982 [2023-11-23 21:22:30,108 INFO L226 Difference]: Without dead ends: 1294 [2023-11-23 21:22:30,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:30,121 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 915 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s 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, 1.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:30,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 1726 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-23 21:22:30,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2023-11-23 21:22:30,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 1294. [2023-11-23 21:22:30,311 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) [2023-11-23 21:22:30,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1841 transitions. [2023-11-23 21:22:30,326 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1841 transitions. Word has length 48 [2023-11-23 21:22:30,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:30,327 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 1841 transitions. [2023-11-23 21:22:30,327 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) [2023-11-23 21:22:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1841 transitions. [2023-11-23 21:22:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 21:22:30,335 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:30,335 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] [2023-11-23 21:22:30,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:22:30,335 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:30,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:30,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1595217284, now seen corresponding path program 1 times [2023-11-23 21:22:30,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:30,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090170068] [2023-11-23 21:22:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:30,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:30,937 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:22:30,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:30,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090170068] [2023-11-23 21:22:30,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090170068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:30,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:30,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:22:30,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404250071] [2023-11-23 21:22:30,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:30,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:22:30,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:30,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:22:30,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:30,941 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) [2023-11-23 21:22:32,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:32,575 INFO L93 Difference]: Finished difference Result 2530 states and 3591 transitions. [2023-11-23 21:22:32,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:22:32,576 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 [2023-11-23 21:22:32,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:32,596 INFO L225 Difference]: With dead ends: 2530 [2023-11-23 21:22:32,596 INFO L226 Difference]: Without dead ends: 2527 [2023-11-23 21:22:32,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:32,603 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 [2023-11-23 21:22:32,604 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] [2023-11-23 21:22:32,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2527 states. [2023-11-23 21:22:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2527 to 2515. [2023-11-23 21:22:32,810 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) [2023-11-23 21:22:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2515 states to 2515 states and 3574 transitions. [2023-11-23 21:22:32,830 INFO L78 Accepts]: Start accepts. Automaton has 2515 states and 3574 transitions. Word has length 55 [2023-11-23 21:22:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:32,831 INFO L495 AbstractCegarLoop]: Abstraction has 2515 states and 3574 transitions. [2023-11-23 21:22:32,832 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) [2023-11-23 21:22:32,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states and 3574 transitions. [2023-11-23 21:22:32,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 21:22:32,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:32,838 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] [2023-11-23 21:22:32,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:22:32,838 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:32,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:32,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2088362610, now seen corresponding path program 1 times [2023-11-23 21:22:32,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:32,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696161383] [2023-11-23 21:22:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:32,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:22:33,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:33,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696161383] [2023-11-23 21:22:33,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696161383] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:33,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:33,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:22:33,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300101642] [2023-11-23 21:22:33,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:33,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:22:33,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:33,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:22:33,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:33,479 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) [2023-11-23 21:22:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:34,975 INFO L93 Difference]: Finished difference Result 6188 states and 8784 transitions. [2023-11-23 21:22:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:22:34,976 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 [2023-11-23 21:22:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:35,005 INFO L225 Difference]: With dead ends: 6188 [2023-11-23 21:22:35,005 INFO L226 Difference]: Without dead ends: 3685 [2023-11-23 21:22:35,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:35,033 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, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:35,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 1700 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 21:22:35,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3685 states. [2023-11-23 21:22:35,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3685 to 3675. [2023-11-23 21:22:35,325 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) [2023-11-23 21:22:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 5214 transitions. [2023-11-23 21:22:35,361 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 5214 transitions. Word has length 56 [2023-11-23 21:22:35,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:35,364 INFO L495 AbstractCegarLoop]: Abstraction has 3675 states and 5214 transitions. [2023-11-23 21:22:35,366 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) [2023-11-23 21:22:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 5214 transitions. [2023-11-23 21:22:35,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 21:22:35,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:35,373 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] [2023-11-23 21:22:35,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:22:35,374 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:35,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:35,375 INFO L85 PathProgramCache]: Analyzing trace with hash -315217465, now seen corresponding path program 1 times [2023-11-23 21:22:35,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:35,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242777238] [2023-11-23 21:22:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:35,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:22:35,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:35,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242777238] [2023-11-23 21:22:35,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242777238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:35,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:35,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:22:35,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909356279] [2023-11-23 21:22:35,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:35,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:22:35,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:35,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:22:35,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:35,630 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) [2023-11-23 21:22:37,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:37,439 INFO L93 Difference]: Finished difference Result 4825 states and 6863 transitions. [2023-11-23 21:22:37,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:22:37,440 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 [2023-11-23 21:22:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:37,477 INFO L225 Difference]: With dead ends: 4825 [2023-11-23 21:22:37,477 INFO L226 Difference]: Without dead ends: 4822 [2023-11-23 21:22:37,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:37,481 INFO L413 NwaCegarLoop]: 859 mSDtfsCounter, 824 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s 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, 1.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:37,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [824 Valid, 1701 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-23 21:22:37,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4822 states. [2023-11-23 21:22:37,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4822 to 4812. [2023-11-23 21:22:37,787 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) [2023-11-23 21:22:37,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4812 states to 4812 states and 6849 transitions. [2023-11-23 21:22:37,818 INFO L78 Accepts]: Start accepts. Automaton has 4812 states and 6849 transitions. Word has length 57 [2023-11-23 21:22:37,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:37,818 INFO L495 AbstractCegarLoop]: Abstraction has 4812 states and 6849 transitions. [2023-11-23 21:22:37,818 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) [2023-11-23 21:22:37,819 INFO L276 IsEmpty]: Start isEmpty. Operand 4812 states and 6849 transitions. [2023-11-23 21:22:37,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 21:22:37,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:37,822 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] [2023-11-23 21:22:37,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:22:37,822 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:37,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:37,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1182287951, now seen corresponding path program 1 times [2023-11-23 21:22:37,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:37,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794231085] [2023-11-23 21:22:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:37,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:37,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:22:38,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:38,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794231085] [2023-11-23 21:22:38,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794231085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:38,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:38,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:22:38,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772222830] [2023-11-23 21:22:38,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:38,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:22:38,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:38,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:22:38,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:38,080 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) [2023-11-23 21:22:39,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:39,238 INFO L93 Difference]: Finished difference Result 4814 states and 6850 transitions. [2023-11-23 21:22:39,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:22:39,239 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 [2023-11-23 21:22:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:39,279 INFO L225 Difference]: With dead ends: 4814 [2023-11-23 21:22:39,279 INFO L226 Difference]: Without dead ends: 4811 [2023-11-23 21:22:39,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:39,284 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, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:39,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [924 Valid, 857 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:22:39,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4811 states. [2023-11-23 21:22:39,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4811 to 4811. [2023-11-23 21:22:39,735 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) [2023-11-23 21:22:39,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 6847 transitions. [2023-11-23 21:22:39,769 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 6847 transitions. Word has length 58 [2023-11-23 21:22:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:39,770 INFO L495 AbstractCegarLoop]: Abstraction has 4811 states and 6847 transitions. [2023-11-23 21:22:39,770 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) [2023-11-23 21:22:39,770 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 6847 transitions. [2023-11-23 21:22:39,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-23 21:22:39,773 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:39,773 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] [2023-11-23 21:22:39,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:22:39,774 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:39,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:39,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2003302922, now seen corresponding path program 1 times [2023-11-23 21:22:39,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:39,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797977574] [2023-11-23 21:22:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:39,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:22:40,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:40,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797977574] [2023-11-23 21:22:40,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797977574] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:40,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:40,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:22:40,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247281904] [2023-11-23 21:22:40,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:40,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:22:40,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:40,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:22:40,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:40,019 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) [2023-11-23 21:22:41,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:41,091 INFO L93 Difference]: Finished difference Result 4813 states and 6848 transitions. [2023-11-23 21:22:41,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:22:41,092 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 [2023-11-23 21:22:41,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:41,129 INFO L225 Difference]: With dead ends: 4813 [2023-11-23 21:22:41,129 INFO L226 Difference]: Without dead ends: 4798 [2023-11-23 21:22:41,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:41,134 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 [2023-11-23 21:22:41,134 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] [2023-11-23 21:22:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2023-11-23 21:22:41,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4798. [2023-11-23 21:22:41,479 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) [2023-11-23 21:22:41,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4798 states to 4798 states and 6829 transitions. [2023-11-23 21:22:41,585 INFO L78 Accepts]: Start accepts. Automaton has 4798 states and 6829 transitions. Word has length 59 [2023-11-23 21:22:41,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:41,586 INFO L495 AbstractCegarLoop]: Abstraction has 4798 states and 6829 transitions. [2023-11-23 21:22:41,586 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) [2023-11-23 21:22:41,587 INFO L276 IsEmpty]: Start isEmpty. Operand 4798 states and 6829 transitions. [2023-11-23 21:22:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-23 21:22:41,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:41,596 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] [2023-11-23 21:22:41,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:22:41,596 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:41,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:41,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1862847354, now seen corresponding path program 1 times [2023-11-23 21:22:41,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:41,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613153898] [2023-11-23 21:22:41,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:41,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:41,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-23 21:22:41,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:41,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613153898] [2023-11-23 21:22:41,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613153898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:41,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:41,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:22:41,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556853495] [2023-11-23 21:22:41,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:41,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:22:41,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:41,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:22:41,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:41,858 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) [2023-11-23 21:22:43,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:43,857 INFO L93 Difference]: Finished difference Result 12300 states and 17429 transitions. [2023-11-23 21:22:43,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:22:43,866 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 [2023-11-23 21:22:43,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:43,936 INFO L225 Difference]: With dead ends: 12300 [2023-11-23 21:22:43,936 INFO L226 Difference]: Without dead ends: 7514 [2023-11-23 21:22:43,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:43,956 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 [2023-11-23 21:22:43,956 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] [2023-11-23 21:22:43,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7514 states. [2023-11-23 21:22:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7514 to 7494. [2023-11-23 21:22:44,647 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) [2023-11-23 21:22:44,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7494 states to 7494 states and 10586 transitions. [2023-11-23 21:22:44,698 INFO L78 Accepts]: Start accepts. Automaton has 7494 states and 10586 transitions. Word has length 118 [2023-11-23 21:22:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:44,699 INFO L495 AbstractCegarLoop]: Abstraction has 7494 states and 10586 transitions. [2023-11-23 21:22:44,700 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) [2023-11-23 21:22:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 7494 states and 10586 transitions. [2023-11-23 21:22:44,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-11-23 21:22:44,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:44,722 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] [2023-11-23 21:22:44,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:22:44,723 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:44,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:44,723 INFO L85 PathProgramCache]: Analyzing trace with hash -312758797, now seen corresponding path program 1 times [2023-11-23 21:22:44,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:44,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682416894] [2023-11-23 21:22:44,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:44,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-23 21:22:45,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:45,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682416894] [2023-11-23 21:22:45,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682416894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:45,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:45,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:22:45,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844281692] [2023-11-23 21:22:45,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:45,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:22:45,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:45,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:22:45,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:22:45,146 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) [2023-11-23 21:22:47,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:47,696 INFO L93 Difference]: Finished difference Result 16489 states and 23657 transitions. [2023-11-23 21:22:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:22:47,696 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 [2023-11-23 21:22:47,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:47,742 INFO L225 Difference]: With dead ends: 16489 [2023-11-23 21:22:47,742 INFO L226 Difference]: Without dead ends: 9007 [2023-11-23 21:22:47,772 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 [2023-11-23 21:22:47,774 INFO L413 NwaCegarLoop]: 1178 mSDtfsCounter, 1239 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s 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, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:47,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1239 Valid, 2125 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-23 21:22:47,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9007 states. [2023-11-23 21:22:48,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9007 to 7502. [2023-11-23 21:22:48,465 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) [2023-11-23 21:22:48,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 10588 transitions. [2023-11-23 21:22:48,505 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 10588 transitions. Word has length 146 [2023-11-23 21:22:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:48,505 INFO L495 AbstractCegarLoop]: Abstraction has 7502 states and 10588 transitions. [2023-11-23 21:22:48,505 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) [2023-11-23 21:22:48,505 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 10588 transitions. [2023-11-23 21:22:48,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-11-23 21:22:48,522 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:48,522 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] [2023-11-23 21:22:48,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:22:48,522 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:48,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:48,523 INFO L85 PathProgramCache]: Analyzing trace with hash 746211669, now seen corresponding path program 1 times [2023-11-23 21:22:48,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:48,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297112026] [2023-11-23 21:22:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:48,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-23 21:22:48,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:48,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297112026] [2023-11-23 21:22:48,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297112026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:48,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:48,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:22:48,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461848538] [2023-11-23 21:22:48,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:48,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:22:48,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:48,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:22:48,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:48,798 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) [2023-11-23 21:22:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:52,886 INFO L93 Difference]: Finished difference Result 18765 states and 26462 transitions. [2023-11-23 21:22:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:22:52,887 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 [2023-11-23 21:22:52,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:52,947 INFO L225 Difference]: With dead ends: 18765 [2023-11-23 21:22:52,947 INFO L226 Difference]: Without dead ends: 11275 [2023-11-23 21:22:52,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:52,983 INFO L413 NwaCegarLoop]: 1652 mSDtfsCounter, 909 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s 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, 2.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:52,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 2487 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-23 21:22:53,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2023-11-23 21:22:54,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 11241. [2023-11-23 21:22:54,244 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) [2023-11-23 21:22:54,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11241 states to 11241 states and 15851 transitions. [2023-11-23 21:22:54,301 INFO L78 Accepts]: Start accepts. Automaton has 11241 states and 15851 transitions. Word has length 148 [2023-11-23 21:22:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:54,301 INFO L495 AbstractCegarLoop]: Abstraction has 11241 states and 15851 transitions. [2023-11-23 21:22:54,302 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) [2023-11-23 21:22:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 11241 states and 15851 transitions. [2023-11-23 21:22:54,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-23 21:22:54,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:54,327 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] [2023-11-23 21:22:54,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 21:22:54,327 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:54,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2139824638, now seen corresponding path program 1 times [2023-11-23 21:22:54,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:54,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664360657] [2023-11-23 21:22:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:54,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2023-11-23 21:22:54,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:54,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664360657] [2023-11-23 21:22:54,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664360657] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:54,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:54,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:22:54,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15873255] [2023-11-23 21:22:54,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:54,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:22:54,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:54,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:22:54,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:54,695 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) [2023-11-23 21:22:58,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:58,164 INFO L93 Difference]: Finished difference Result 27159 states and 38237 transitions. [2023-11-23 21:22:58,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:22:58,165 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 151 [2023-11-23 21:22:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:58,237 INFO L225 Difference]: With dead ends: 27159 [2023-11-23 21:22:58,238 INFO L226 Difference]: Without dead ends: 15930 [2023-11-23 21:22:58,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:22:58,278 INFO L413 NwaCegarLoop]: 1447 mSDtfsCounter, 840 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 2145 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:58,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 2145 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-23 21:22:58,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15930 states. [2023-11-23 21:23:00,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15930 to 15898. [2023-11-23 21:23:00,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15898 states, 10239 states have (on average 1.377380603574568) internal successors, (14103), 10472 states have internal predecessors, (14103), 4080 states have call successors, (4080), 1585 states have call predecessors, (4080), 1578 states have return successors, (4101), 3972 states have call predecessors, (4101), 4077 states have call successors, (4101) [2023-11-23 21:23:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15898 states to 15898 states and 22284 transitions. [2023-11-23 21:23:00,308 INFO L78 Accepts]: Start accepts. Automaton has 15898 states and 22284 transitions. Word has length 151 [2023-11-23 21:23:00,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:00,309 INFO L495 AbstractCegarLoop]: Abstraction has 15898 states and 22284 transitions. [2023-11-23 21:23:00,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-11-23 21:23:00,309 INFO L276 IsEmpty]: Start isEmpty. Operand 15898 states and 22284 transitions. [2023-11-23 21:23:00,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-11-23 21:23:00,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:00,337 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:23:00,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:23:00,338 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:23:00,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:00,338 INFO L85 PathProgramCache]: Analyzing trace with hash -769154362, now seen corresponding path program 1 times [2023-11-23 21:23:00,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:00,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141740378] [2023-11-23 21:23:00,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:00,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat