./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E --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 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:36:27,299 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:36:27,393 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-64bit-Taipan_Default.epf [2024-11-14 03:36:27,403 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:36:27,403 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:36:27,440 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:36:27,440 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:36:27,441 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:36:27,441 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:36:27,441 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:36:27,443 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:36:27,444 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:36:27,444 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:36:27,445 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:36:27,446 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:36:27,446 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:36:27,446 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:36:27,446 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:36:27,447 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:36:27,447 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:36:27,448 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:36:27,448 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:36:27,449 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:36:27,449 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:36:27,449 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:36:27,450 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:36:27,450 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:36:27,450 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:36:27,450 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:36:27,450 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:36:27,450 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:36:27,451 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:36:27,451 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:36:27,451 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:36:27,451 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:36:27,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:36:27,453 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:36:27,453 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:36:27,453 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:36:27,453 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:36:27,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:36:27,454 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:36:27,454 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:36:27,454 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:36:27,454 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E 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 -> 4de76b02991c4f8780142b48e1370b1ba073d7148b74e77b2c83d6f21359d59e [2024-11-14 03:36:27,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:36:27,846 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:36:27,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:36:27,851 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:36:27,851 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:36:27,853 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i Unable to find full path for "g++" [2024-11-14 03:36:30,068 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:36:30,876 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:36:30,877 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2024-11-14 03:36:30,936 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/data/52ff8478f/79dc49e9ff4744f6bb89a621001c307a/FLAG70a80a575 [2024-11-14 03:36:30,958 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/data/52ff8478f/79dc49e9ff4744f6bb89a621001c307a [2024-11-14 03:36:30,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:36:30,964 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:36:30,966 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:36:30,966 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:36:30,972 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:36:30,973 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:36:30" (1/1) ... [2024-11-14 03:36:30,974 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f3d2328 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:30, skipping insertion in model container [2024-11-14 03:36:30,974 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:36:30" (1/1) ... [2024-11-14 03:36:31,106 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:36:32,830 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2024-11-14 03:36:33,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:36:33,096 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:36:33,212 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 %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [3542] [2024-11-14 03:36:33,214 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; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [3549] [2024-11-14 03:36:33,215 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, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [3557-3558] [2024-11-14 03:36:33,477 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i[185536,185549] [2024-11-14 03:36:33,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:36:33,650 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:36:33,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:33 WrapperNode [2024-11-14 03:36:33,651 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:36:33,653 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:36:33,653 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:36:33,654 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:36:33,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:33" (1/1) ... [2024-11-14 03:36:33,722 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:33" (1/1) ... [2024-11-14 03:36:33,875 INFO L138 Inliner]: procedures = 282, calls = 1556, calls flagged for inlining = 103, calls inlined = 86, statements flattened = 2929 [2024-11-14 03:36:33,876 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:36:33,876 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:36:33,876 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:36:33,878 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:36:33,887 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:33" (1/1) ... [2024-11-14 03:36:33,888 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:33" (1/1) ... [2024-11-14 03:36:33,924 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:33" (1/1) ... [2024-11-14 03:36:33,925 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:33" (1/1) ... [2024-11-14 03:36:34,065 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:33" (1/1) ... [2024-11-14 03:36:34,094 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:33" (1/1) ... [2024-11-14 03:36:34,123 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:33" (1/1) ... [2024-11-14 03:36:34,144 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:33" (1/1) ... [2024-11-14 03:36:34,181 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:36:34,182 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:36:34,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:36:34,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:36:34,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:33" (1/1) ... [2024-11-14 03:36:34,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:36:34,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:34,236 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:36:34,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:36:34,271 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2024-11-14 03:36:34,271 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2024-11-14 03:36:34,271 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2024-11-14 03:36:34,271 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2024-11-14 03:36:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2024-11-14 03:36:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2024-11-14 03:36:34,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2024-11-14 03:36:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-14 03:36:34,272 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-14 03:36:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_wdm_mutex [2024-11-14 03:36:34,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_wdm_mutex [2024-11-14 03:36:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure recover_from_urb_loss [2024-11-14 03:36:34,272 INFO L138 BoogieDeclarations]: Found implementation of procedure recover_from_urb_loss [2024-11-14 03:36:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_control_urb [2024-11-14 03:36:34,272 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_control_urb [2024-11-14 03:36:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2024-11-14 03:36:34,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2024-11-14 03:36:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_1 [2024-11-14 03:36:34,273 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_1 [2024-11-14 03:36:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure __might_sleep [2024-11-14 03:36:34,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_sleep [2024-11-14 03:36:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2024-11-14 03:36:34,273 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2024-11-14 03:36:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_create [2024-11-14 03:36:34,274 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_create [2024-11-14 03:36:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2024-11-14 03:36:34,274 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2024-11-14 03:36:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2024-11-14 03:36:34,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2024-11-14 03:36:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_poll [2024-11-14 03:36:34,274 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_poll [2024-11-14 03:36:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2024-11-14 03:36:34,274 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2024-11-14 03:36:34,274 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-14 03:36:34,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-14 03:36:34,275 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2024-11-14 03:36:34,275 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2024-11-14 03:36:34,275 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2024-11-14 03:36:34,275 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2024-11-14 03:36:34,275 INFO L130 BoogieDeclarations]: Found specification of procedure clear_wdm_read_flag [2024-11-14 03:36:34,275 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_wdm_read_flag [2024-11-14 03:36:34,275 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_cancel_work_sync_39 [2024-11-14 03:36:34,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_cancel_work_sync_39 [2024-11-14 03:36:34,275 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_write [2024-11-14 03:36:34,275 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_write [2024-11-14 03:36:34,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 03:36:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2024-11-14 03:36:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2024-11-14 03:36:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_ioctl [2024-11-14 03:36:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_ioctl [2024-11-14 03:36:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_disconnect [2024-11-14 03:36:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_disconnect [2024-11-14 03:36:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-14 03:36:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_rlock_of_wdm_device [2024-11-14 03:36:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_rlock_of_wdm_device [2024-11-14 03:36:34,276 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2024-11-14 03:36:34,276 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2024-11-14 03:36:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2024-11-14 03:36:34,277 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2024-11-14 03:36:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_rxwork [2024-11-14 03:36:34,277 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_rxwork [2024-11-14 03:36:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 03:36:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure disable_work_1 [2024-11-14 03:36:34,277 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_work_1 [2024-11-14 03:36:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-14 03:36:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2024-11-14 03:36:34,277 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2024-11-14 03:36:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure cancel_work_sync [2024-11-14 03:36:34,277 INFO L138 BoogieDeclarations]: Found implementation of procedure cancel_work_sync [2024-11-14 03:36:34,277 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2024-11-14 03:36:34,278 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2024-11-14 03:36:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2024-11-14 03:36:34,278 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2024-11-14 03:36:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2024-11-14 03:36:34,278 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2024-11-14 03:36:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2024-11-14 03:36:34,278 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2024-11-14 03:36:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2024-11-14 03:36:34,278 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2024-11-14 03:36:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2024-11-14 03:36:34,278 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2024-11-14 03:36:34,278 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_wdm_mutex [2024-11-14 03:36:34,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_wdm_mutex [2024-11-14 03:36:34,279 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_wlock_of_wdm_device [2024-11-14 03:36:34,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_wlock_of_wdm_device [2024-11-14 03:36:34,279 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2024-11-14 03:36:34,279 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2024-11-14 03:36:34,279 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2024-11-14 03:36:34,279 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2024-11-14 03:36:34,279 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2024-11-14 03:36:34,279 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2024-11-14 03:36:34,279 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_flush [2024-11-14 03:36:34,279 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_flush [2024-11-14 03:36:34,279 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_wlock_of_wdm_device [2024-11-14 03:36:34,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_wlock_of_wdm_device [2024-11-14 03:36:34,279 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2024-11-14 03:36:34,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2024-11-14 03:36:34,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2024-11-14 03:36:34,280 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2024-11-14 03:36:34,280 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2024-11-14 03:36:34,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 03:36:34,280 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2024-11-14 03:36:34,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2024-11-14 03:36:34,280 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2024-11-14 03:36:34,280 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2024-11-14 03:36:34,280 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2024-11-14 03:36:34,280 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2024-11-14 03:36:34,280 INFO L130 BoogieDeclarations]: Found specification of procedure kill_urbs [2024-11-14 03:36:34,281 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_urbs [2024-11-14 03:36:34,281 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait_event [2024-11-14 03:36:34,281 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait_event [2024-11-14 03:36:34,281 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2024-11-14 03:36:34,281 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2024-11-14 03:36:34,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 03:36:34,281 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2024-11-14 03:36:34,281 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2024-11-14 03:36:34,281 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2024-11-14 03:36:34,281 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2024-11-14 03:36:34,281 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2024-11-14 03:36:34,281 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2024-11-14 03:36:34,281 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2024-11-14 03:36:34,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2024-11-14 03:36:34,281 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2024-11-14 03:36:34,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2024-11-14 03:36:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_resume [2024-11-14 03:36:34,282 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_resume [2024-11-14 03:36:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-14 03:36:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2024-11-14 03:36:34,282 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2024-11-14 03:36:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2024-11-14 03:36:34,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2024-11-14 03:36:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:36:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2024-11-14 03:36:34,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2024-11-14 03:36:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-14 03:36:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2024-11-14 03:36:34,282 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2024-11-14 03:36:34,282 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2024-11-14 03:36:34,283 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2024-11-14 03:36:34,283 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2024-11-14 03:36:34,283 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2024-11-14 03:36:34,283 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2024-11-14 03:36:34,283 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2024-11-14 03:36:34,283 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_rlock_of_wdm_device [2024-11-14 03:36:34,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_rlock_of_wdm_device [2024-11-14 03:36:34,283 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_work [2024-11-14 03:36:34,283 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_work [2024-11-14 03:36:34,283 INFO L130 BoogieDeclarations]: Found specification of procedure wdm_find_device [2024-11-14 03:36:34,283 INFO L138 BoogieDeclarations]: Found implementation of procedure wdm_find_device [2024-11-14 03:36:34,283 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2024-11-14 03:36:34,284 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2024-11-14 03:36:34,284 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2024-11-14 03:36:34,284 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2024-11-14 03:36:34,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:36:34,284 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2024-11-14 03:36:34,284 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2024-11-14 03:36:34,284 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2024-11-14 03:36:34,284 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2024-11-14 03:36:34,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:36:34,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:36:35,082 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:36:35,086 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:36:35,827 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2024-11-14 03:36:43,745 INFO L? ?]: Removed 1120 outVars from TransFormulas that were not future-live. [2024-11-14 03:36:43,746 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:36:44,888 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:36:44,888 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-14 03:36:44,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:36:44 BoogieIcfgContainer [2024-11-14 03:36:44,892 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:36:44,897 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:36:44,897 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:36:44,905 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:36:44,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:36:30" (1/3) ... [2024-11-14 03:36:44,906 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45748eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:36:44, skipping insertion in model container [2024-11-14 03:36:44,906 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:36:33" (2/3) ... [2024-11-14 03:36:44,907 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45748eb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:36:44, skipping insertion in model container [2024-11-14 03:36:44,907 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:36:44" (3/3) ... [2024-11-14 03:36:44,908 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i [2024-11-14 03:36:44,931 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:36:44,937 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--usb--class--cdc-wdm.ko-entry_point.cil.out.i that has 74 procedures, 914 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-14 03:36:45,070 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:36:45,095 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d04e056, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:36:45,095 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:36:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 913 states, 523 states have (on average 1.315487571701721) internal successors, (688), 558 states have internal predecessors, (688), 316 states have call successors, (316), 73 states have call predecessors, (316), 72 states have return successors, (311), 310 states have call predecessors, (311), 311 states have call successors, (311) [2024-11-14 03:36:45,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-14 03:36:45,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:45,131 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:36:45,132 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:45,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:45,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1379282864, now seen corresponding path program 1 times [2024-11-14 03:36:45,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:45,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116111608] [2024-11-14 03:36:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:45,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-11-14 03:36:49,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:49,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116111608] [2024-11-14 03:36:49,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116111608] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:36:49,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:36:49,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:36:49,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145065447] [2024-11-14 03:36:49,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:36:49,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:36:49,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:49,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:36:49,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:36:49,938 INFO L87 Difference]: Start difference. First operand has 913 states, 523 states have (on average 1.315487571701721) internal successors, (688), 558 states have internal predecessors, (688), 316 states have call successors, (316), 73 states have call predecessors, (316), 72 states have return successors, (311), 310 states have call predecessors, (311), 311 states have call successors, (311) 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2024-11-14 03:36:52,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:36:54,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:36:58,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:00,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:02,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:02,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:37:02,659 INFO L93 Difference]: Finished difference Result 2643 states and 3854 transitions. [2024-11-14 03:37:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:37:02,662 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) Word has length 140 [2024-11-14 03:37:02,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:37:02,695 INFO L225 Difference]: With dead ends: 2643 [2024-11-14 03:37:02,696 INFO L226 Difference]: Without dead ends: 1752 [2024-11-14 03:37:02,707 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:37:02,710 INFO L432 NwaCegarLoop]: 1185 mSDtfsCounter, 1212 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 3 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 2357 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:37:02,711 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 2357 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 242 Invalid, 5 Unknown, 0 Unchecked, 12.4s Time] [2024-11-14 03:37:02,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2024-11-14 03:37:02,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1742. [2024-11-14 03:37:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1742 states, 1011 states have (on average 1.3026706231454006) internal successors, (1317), 1054 states have internal predecessors, (1317), 589 states have call successors, (589), 142 states have call predecessors, (589), 141 states have return successors, (575), 573 states have call predecessors, (575), 575 states have call successors, (575) [2024-11-14 03:37:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1742 states to 1742 states and 2481 transitions. [2024-11-14 03:37:02,991 INFO L78 Accepts]: Start accepts. Automaton has 1742 states and 2481 transitions. Word has length 140 [2024-11-14 03:37:02,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:37:02,992 INFO L471 AbstractCegarLoop]: Abstraction has 1742 states and 2481 transitions. [2024-11-14 03:37:02,992 INFO L472 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, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 1 states have call predecessors, (18), 1 states have call successors, (18) [2024-11-14 03:37:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1742 states and 2481 transitions. [2024-11-14 03:37:03,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 03:37:03,003 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:37:03,004 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:37:03,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:37:03,004 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:37:03,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:37:03,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1822221471, now seen corresponding path program 1 times [2024-11-14 03:37:03,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:37:03,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794401495] [2024-11-14 03:37:03,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:37:03,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:37:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:37:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-11-14 03:37:05,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:37:05,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794401495] [2024-11-14 03:37:05,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794401495] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:37:05,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:37:05,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:37:05,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579575545] [2024-11-14 03:37:05,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:37:05,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:37:05,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:37:05,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:37:05,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:37:05,232 INFO L87 Difference]: Start difference. First operand 1742 states and 2481 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-14 03:37:07,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:11,566 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:13,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:15,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:37:15,874 INFO L93 Difference]: Finished difference Result 4367 states and 6147 transitions. [2024-11-14 03:37:15,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:37:15,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 145 [2024-11-14 03:37:15,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:37:15,904 INFO L225 Difference]: With dead ends: 4367 [2024-11-14 03:37:15,904 INFO L226 Difference]: Without dead ends: 2661 [2024-11-14 03:37:15,915 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:37:15,916 INFO L432 NwaCegarLoop]: 1178 mSDtfsCounter, 680 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 2266 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:37:15,917 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 2266 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 4 Unknown, 0 Unchecked, 10.4s Time] [2024-11-14 03:37:15,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2661 states. [2024-11-14 03:37:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2661 to 2640. [2024-11-14 03:37:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2640 states, 1530 states have (on average 1.2947712418300654) internal successors, (1981), 1581 states have internal predecessors, (1981), 862 states have call successors, (862), 248 states have call predecessors, (862), 247 states have return successors, (848), 844 states have call predecessors, (848), 848 states have call successors, (848) [2024-11-14 03:37:16,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 3691 transitions. [2024-11-14 03:37:16,203 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 3691 transitions. Word has length 145 [2024-11-14 03:37:16,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:37:16,205 INFO L471 AbstractCegarLoop]: Abstraction has 2640 states and 3691 transitions. [2024-11-14 03:37:16,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-14 03:37:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 3691 transitions. [2024-11-14 03:37:16,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-11-14 03:37:16,212 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:37:16,213 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:37:16,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 03:37:16,213 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:37:16,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:37:16,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1568290158, now seen corresponding path program 1 times [2024-11-14 03:37:16,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:37:16,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750028462] [2024-11-14 03:37:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:37:16,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:37:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:37:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-11-14 03:37:18,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:37:18,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750028462] [2024-11-14 03:37:18,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750028462] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:37:18,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:37:18,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:37:18,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797121724] [2024-11-14 03:37:18,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:37:18,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:37:18,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:37:18,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:37:18,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:37:18,697 INFO L87 Difference]: Start difference. First operand 2640 states and 3691 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 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) [2024-11-14 03:37:20,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:23,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:23,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:37:23,881 INFO L93 Difference]: Finished difference Result 2642 states and 3692 transitions. [2024-11-14 03:37:23,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:37:23,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 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 155 [2024-11-14 03:37:23,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:37:23,908 INFO L225 Difference]: With dead ends: 2642 [2024-11-14 03:37:23,908 INFO L226 Difference]: Without dead ends: 2639 [2024-11-14 03:37:23,910 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:37:23,915 INFO L432 NwaCegarLoop]: 1166 mSDtfsCounter, 1240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:37:23,916 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1240 Valid, 1166 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2024-11-14 03:37:23,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2024-11-14 03:37:24,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2639. [2024-11-14 03:37:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2639 states, 1530 states have (on average 1.2941176470588236) internal successors, (1980), 1580 states have internal predecessors, (1980), 861 states have call successors, (861), 248 states have call predecessors, (861), 247 states have return successors, (848), 844 states have call predecessors, (848), 848 states have call successors, (848) [2024-11-14 03:37:24,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2639 states to 2639 states and 3689 transitions. [2024-11-14 03:37:24,110 INFO L78 Accepts]: Start accepts. Automaton has 2639 states and 3689 transitions. Word has length 155 [2024-11-14 03:37:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:37:24,111 INFO L471 AbstractCegarLoop]: Abstraction has 2639 states and 3689 transitions. [2024-11-14 03:37:24,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 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) [2024-11-14 03:37:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2639 states and 3689 transitions. [2024-11-14 03:37:24,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-11-14 03:37:24,119 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:37:24,119 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:37:24,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 03:37:24,120 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:37:24,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:37:24,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1371835044, now seen corresponding path program 1 times [2024-11-14 03:37:24,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:37:24,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672842667] [2024-11-14 03:37:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:37:24,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:37:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:37:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-11-14 03:37:26,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:37:26,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672842667] [2024-11-14 03:37:26,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672842667] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:37:26,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:37:26,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:37:26,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722841286] [2024-11-14 03:37:26,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:37:26,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:37:26,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:37:26,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:37:26,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:37:26,729 INFO L87 Difference]: Start difference. First operand 2639 states and 3689 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 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) [2024-11-14 03:37:28,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:31,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:31,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:37:31,977 INFO L93 Difference]: Finished difference Result 2641 states and 3690 transitions. [2024-11-14 03:37:31,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:37:31,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 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 156 [2024-11-14 03:37:32,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:37:32,031 INFO L225 Difference]: With dead ends: 2641 [2024-11-14 03:37:32,031 INFO L226 Difference]: Without dead ends: 2638 [2024-11-14 03:37:32,033 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:37:32,036 INFO L432 NwaCegarLoop]: 1164 mSDtfsCounter, 1237 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:37:32,037 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1237 Valid, 1164 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2024-11-14 03:37:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2024-11-14 03:37:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2638. [2024-11-14 03:37:32,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 1530 states have (on average 1.2934640522875818) internal successors, (1979), 1579 states have internal predecessors, (1979), 860 states have call successors, (860), 248 states have call predecessors, (860), 247 states have return successors, (848), 844 states have call predecessors, (848), 848 states have call successors, (848) [2024-11-14 03:37:32,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 3687 transitions. [2024-11-14 03:37:32,245 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 3687 transitions. Word has length 156 [2024-11-14 03:37:32,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:37:32,247 INFO L471 AbstractCegarLoop]: Abstraction has 2638 states and 3687 transitions. [2024-11-14 03:37:32,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 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) [2024-11-14 03:37:32,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 3687 transitions. [2024-11-14 03:37:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-14 03:37:32,252 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:37:32,252 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:37:32,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 03:37:32,253 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:37:32,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:37:32,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1185607271, now seen corresponding path program 1 times [2024-11-14 03:37:32,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:37:32,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791885786] [2024-11-14 03:37:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:37:32,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:37:34,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:37:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-11-14 03:37:34,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:37:34,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791885786] [2024-11-14 03:37:34,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791885786] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:37:34,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:37:34,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:37:34,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012233919] [2024-11-14 03:37:34,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:37:34,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:37:34,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:37:34,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:37:34,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:37:34,448 INFO L87 Difference]: Start difference. First operand 2638 states and 3687 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2024-11-14 03:37:36,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:40,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:42,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:42,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:37:42,653 INFO L93 Difference]: Finished difference Result 6578 states and 9169 transitions. [2024-11-14 03:37:42,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:37:42,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 162 [2024-11-14 03:37:42,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:37:42,689 INFO L225 Difference]: With dead ends: 6578 [2024-11-14 03:37:42,690 INFO L226 Difference]: Without dead ends: 3984 [2024-11-14 03:37:42,704 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:37:42,705 INFO L432 NwaCegarLoop]: 1570 mSDtfsCounter, 871 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 3 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 2671 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:37:42,705 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 2671 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 290 Invalid, 3 Unknown, 0 Unchecked, 8.0s Time] [2024-11-14 03:37:42,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2024-11-14 03:37:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 3962. [2024-11-14 03:37:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3962 states, 2333 states have (on average 1.2987569652807545) internal successors, (3030), 2412 states have internal predecessors, (3030), 1248 states have call successors, (1248), 381 states have call predecessors, (1248), 380 states have return successors, (1236), 1228 states have call predecessors, (1236), 1236 states have call successors, (1236) [2024-11-14 03:37:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3962 states to 3962 states and 5514 transitions. [2024-11-14 03:37:43,012 INFO L78 Accepts]: Start accepts. Automaton has 3962 states and 5514 transitions. Word has length 162 [2024-11-14 03:37:43,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:37:43,013 INFO L471 AbstractCegarLoop]: Abstraction has 3962 states and 5514 transitions. [2024-11-14 03:37:43,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2024-11-14 03:37:43,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3962 states and 5514 transitions. [2024-11-14 03:37:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-11-14 03:37:43,016 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:37:43,017 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:37:43,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 03:37:43,017 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:37:43,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:37:43,018 INFO L85 PathProgramCache]: Analyzing trace with hash -423301327, now seen corresponding path program 1 times [2024-11-14 03:37:43,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:37:43,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484088724] [2024-11-14 03:37:43,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:37:43,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:37:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:37:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-11-14 03:37:44,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:37:44,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484088724] [2024-11-14 03:37:44,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484088724] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:37:44,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:37:44,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:37:44,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385696407] [2024-11-14 03:37:44,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:37:44,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:37:44,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:37:44,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:37:44,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:37:44,755 INFO L87 Difference]: Start difference. First operand 3962 states and 5514 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 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) [2024-11-14 03:37:46,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:49,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:49,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:37:49,941 INFO L93 Difference]: Finished difference Result 3964 states and 5515 transitions. [2024-11-14 03:37:49,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:37:49,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 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 157 [2024-11-14 03:37:49,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:37:49,968 INFO L225 Difference]: With dead ends: 3964 [2024-11-14 03:37:49,968 INFO L226 Difference]: Without dead ends: 3961 [2024-11-14 03:37:49,970 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:37:49,970 INFO L432 NwaCegarLoop]: 1162 mSDtfsCounter, 1234 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:37:49,971 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1234 Valid, 1162 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2024-11-14 03:37:49,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3961 states. [2024-11-14 03:37:50,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3961 to 3961. [2024-11-14 03:37:50,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3961 states, 2333 states have (on average 1.2983283326189456) internal successors, (3029), 2411 states have internal predecessors, (3029), 1247 states have call successors, (1247), 381 states have call predecessors, (1247), 380 states have return successors, (1236), 1228 states have call predecessors, (1236), 1236 states have call successors, (1236) [2024-11-14 03:37:50,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 5512 transitions. [2024-11-14 03:37:50,386 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 5512 transitions. Word has length 157 [2024-11-14 03:37:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:37:50,387 INFO L471 AbstractCegarLoop]: Abstraction has 3961 states and 5512 transitions. [2024-11-14 03:37:50,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 3 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) [2024-11-14 03:37:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 5512 transitions. [2024-11-14 03:37:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-14 03:37:50,390 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:37:50,390 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:37:50,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 03:37:50,391 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:37:50,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:37:50,391 INFO L85 PathProgramCache]: Analyzing trace with hash -237949113, now seen corresponding path program 1 times [2024-11-14 03:37:50,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:37:50,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118088841] [2024-11-14 03:37:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:37:50,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:37:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:37:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-11-14 03:37:52,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:37:52,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118088841] [2024-11-14 03:37:52,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118088841] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:37:52,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:37:52,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:37:52,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079983310] [2024-11-14 03:37:52,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:37:52,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:37:52,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:37:52,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:37:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:37:52,243 INFO L87 Difference]: Start difference. First operand 3961 states and 5512 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 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) [2024-11-14 03:37:54,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:37:58,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:00,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:02,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:02,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:38:02,575 INFO L93 Difference]: Finished difference Result 11184 states and 15482 transitions. [2024-11-14 03:38:02,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:38:02,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 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 158 [2024-11-14 03:38:02,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:38:02,624 INFO L225 Difference]: With dead ends: 11184 [2024-11-14 03:38:02,624 INFO L226 Difference]: Without dead ends: 7269 [2024-11-14 03:38:02,643 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:38:02,644 INFO L432 NwaCegarLoop]: 1232 mSDtfsCounter, 1039 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 7 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1039 SdHoareTripleChecker+Valid, 2292 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:38:02,644 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1039 Valid, 2292 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 244 Invalid, 4 Unknown, 0 Unchecked, 9.9s Time] [2024-11-14 03:38:02,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7269 states. [2024-11-14 03:38:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7269 to 7249. [2024-11-14 03:38:03,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7249 states, 4292 states have (on average 1.2961323392357875) internal successors, (5563), 4429 states have internal predecessors, (5563), 2222 states have call successors, (2222), 744 states have call predecessors, (2222), 734 states have return successors, (2210), 2175 states have call predecessors, (2210), 2210 states have call successors, (2210) [2024-11-14 03:38:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7249 states to 7249 states and 9995 transitions. [2024-11-14 03:38:03,161 INFO L78 Accepts]: Start accepts. Automaton has 7249 states and 9995 transitions. Word has length 158 [2024-11-14 03:38:03,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:38:03,161 INFO L471 AbstractCegarLoop]: Abstraction has 7249 states and 9995 transitions. [2024-11-14 03:38:03,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 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) [2024-11-14 03:38:03,164 INFO L276 IsEmpty]: Start isEmpty. Operand 7249 states and 9995 transitions. [2024-11-14 03:38:03,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-14 03:38:03,166 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:38:03,166 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:38:03,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 03:38:03,167 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:38:03,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:38:03,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1213007092, now seen corresponding path program 1 times [2024-11-14 03:38:03,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:38:03,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702001071] [2024-11-14 03:38:03,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:38:03,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:38:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:38:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-11-14 03:38:04,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:38:04,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702001071] [2024-11-14 03:38:04,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702001071] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:38:04,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:38:04,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:38:04,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558749647] [2024-11-14 03:38:04,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:38:04,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:38:04,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:38:04,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:38:04,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:38:04,739 INFO L87 Difference]: Start difference. First operand 7249 states and 9995 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 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) [2024-11-14 03:38:06,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:10,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:10,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:38:10,233 INFO L93 Difference]: Finished difference Result 7893 states and 10511 transitions. [2024-11-14 03:38:10,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:38:10,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 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 159 [2024-11-14 03:38:10,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:38:10,306 INFO L225 Difference]: With dead ends: 7893 [2024-11-14 03:38:10,306 INFO L226 Difference]: Without dead ends: 7889 [2024-11-14 03:38:10,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:38:10,311 INFO L432 NwaCegarLoop]: 1157 mSDtfsCounter, 1030 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1030 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:38:10,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1030 Valid, 1398 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 160 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2024-11-14 03:38:10,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7889 states. [2024-11-14 03:38:10,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7889 to 7883. [2024-11-14 03:38:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7883 states, 4636 states have (on average 1.276100086281277) internal successors, (5916), 4767 states have internal predecessors, (5916), 2292 states have call successors, (2292), 968 states have call predecessors, (2292), 954 states have return successors, (2282), 2247 states have call predecessors, (2282), 2282 states have call successors, (2282) [2024-11-14 03:38:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7883 states to 7883 states and 10490 transitions. [2024-11-14 03:38:10,863 INFO L78 Accepts]: Start accepts. Automaton has 7883 states and 10490 transitions. Word has length 159 [2024-11-14 03:38:10,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:38:10,864 INFO L471 AbstractCegarLoop]: Abstraction has 7883 states and 10490 transitions. [2024-11-14 03:38:10,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 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) [2024-11-14 03:38:10,864 INFO L276 IsEmpty]: Start isEmpty. Operand 7883 states and 10490 transitions. [2024-11-14 03:38:10,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-14 03:38:10,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:38:10,867 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:38:10,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 03:38:10,867 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:38:10,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:38:10,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1051985942, now seen corresponding path program 1 times [2024-11-14 03:38:10,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:38:10,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527908799] [2024-11-14 03:38:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:38:10,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:38:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:38:12,611 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-11-14 03:38:12,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:38:12,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527908799] [2024-11-14 03:38:12,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527908799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:38:12,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:38:12,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:38:12,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378255323] [2024-11-14 03:38:12,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:38:12,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:38:12,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:38:12,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:38:12,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:38:12,614 INFO L87 Difference]: Start difference. First operand 7883 states and 10490 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 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) [2024-11-14 03:38:14,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:18,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:20,612 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:22,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:22,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:38:22,755 INFO L93 Difference]: Finished difference Result 21686 states and 28941 transitions. [2024-11-14 03:38:22,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:38:22,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 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 160 [2024-11-14 03:38:22,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:38:22,828 INFO L225 Difference]: With dead ends: 21686 [2024-11-14 03:38:22,828 INFO L226 Difference]: Without dead ends: 13842 [2024-11-14 03:38:22,856 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:38:22,857 INFO L432 NwaCegarLoop]: 1191 mSDtfsCounter, 1080 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 2181 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:38:22,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1080 Valid, 2181 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 4 Unknown, 0 Unchecked, 9.6s Time] [2024-11-14 03:38:22,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13842 states. [2024-11-14 03:38:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13842 to 13813. [2024-11-14 03:38:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13813 states, 8217 states have (on average 1.2866009492515516) internal successors, (10572), 8446 states have internal predecessors, (10572), 3919 states have call successors, (3919), 1721 states have call predecessors, (3919), 1676 states have return successors, (3940), 3809 states have call predecessors, (3940), 3908 states have call successors, (3940) [2024-11-14 03:38:23,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13813 states to 13813 states and 18431 transitions. [2024-11-14 03:38:23,928 INFO L78 Accepts]: Start accepts. Automaton has 13813 states and 18431 transitions. Word has length 160 [2024-11-14 03:38:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:38:23,929 INFO L471 AbstractCegarLoop]: Abstraction has 13813 states and 18431 transitions. [2024-11-14 03:38:23,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 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) [2024-11-14 03:38:23,930 INFO L276 IsEmpty]: Start isEmpty. Operand 13813 states and 18431 transitions. [2024-11-14 03:38:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2024-11-14 03:38:23,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:38:23,939 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2024-11-14 03:38:23,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 03:38:23,939 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:38:23,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:38:23,939 INFO L85 PathProgramCache]: Analyzing trace with hash -890930493, now seen corresponding path program 1 times [2024-11-14 03:38:23,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:38:23,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997629690] [2024-11-14 03:38:23,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:38:23,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:38:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:38:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2024-11-14 03:38:25,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:38:25,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997629690] [2024-11-14 03:38:25,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997629690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:38:25,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:38:25,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:38:25,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883160648] [2024-11-14 03:38:25,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:38:25,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:38:25,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:38:25,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:38:25,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:38:25,338 INFO L87 Difference]: Start difference. First operand 13813 states and 18431 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2024-11-14 03:38:27,384 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:29,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:33,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:35,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:38:35,085 INFO L93 Difference]: Finished difference Result 20918 states and 27895 transitions. [2024-11-14 03:38:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:38:35,086 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 201 [2024-11-14 03:38:35,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:38:35,135 INFO L225 Difference]: With dead ends: 20918 [2024-11-14 03:38:35,135 INFO L226 Difference]: Without dead ends: 7149 [2024-11-14 03:38:35,179 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:38:35,179 INFO L432 NwaCegarLoop]: 1169 mSDtfsCounter, 12 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2324 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2024-11-14 03:38:35,180 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2324 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 235 Invalid, 4 Unknown, 0 Unchecked, 9.4s Time] [2024-11-14 03:38:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7149 states. [2024-11-14 03:38:35,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7149 to 7073. [2024-11-14 03:38:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7073 states, 4212 states have (on average 1.2889363722697056) internal successors, (5429), 4332 states have internal predecessors, (5429), 2001 states have call successors, (2001), 883 states have call predecessors, (2001), 859 states have return successors, (2006), 1940 states have call predecessors, (2006), 1990 states have call successors, (2006) [2024-11-14 03:38:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7073 states to 7073 states and 9436 transitions. [2024-11-14 03:38:35,651 INFO L78 Accepts]: Start accepts. Automaton has 7073 states and 9436 transitions. Word has length 201 [2024-11-14 03:38:35,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:38:35,652 INFO L471 AbstractCegarLoop]: Abstraction has 7073 states and 9436 transitions. [2024-11-14 03:38:35,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2024-11-14 03:38:35,652 INFO L276 IsEmpty]: Start isEmpty. Operand 7073 states and 9436 transitions. [2024-11-14 03:38:35,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2024-11-14 03:38:35,658 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:38:35,658 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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] [2024-11-14 03:38:35,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 03:38:35,659 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:38:35,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:38:35,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1256660005, now seen corresponding path program 1 times [2024-11-14 03:38:35,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:38:35,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780961877] [2024-11-14 03:38:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:38:35,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:38:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:38:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2024-11-14 03:38:37,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:38:37,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780961877] [2024-11-14 03:38:37,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780961877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:38:37,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:38:37,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:38:37,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139812167] [2024-11-14 03:38:37,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:38:37,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:38:37,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:38:37,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:38:37,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:38:37,461 INFO L87 Difference]: Start difference. First operand 7073 states and 9436 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2024-11-14 03:38:39,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:41,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:45,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:47,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:49,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:38:50,003 INFO L93 Difference]: Finished difference Result 17528 states and 23311 transitions. [2024-11-14 03:38:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:38:50,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 205 [2024-11-14 03:38:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:38:50,071 INFO L225 Difference]: With dead ends: 17528 [2024-11-14 03:38:50,071 INFO L226 Difference]: Without dead ends: 10590 [2024-11-14 03:38:50,096 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:38:50,097 INFO L432 NwaCegarLoop]: 1544 mSDtfsCounter, 949 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 20 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 2592 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:38:50,097 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [949 Valid, 2592 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 305 Invalid, 5 Unknown, 0 Unchecked, 11.9s Time] [2024-11-14 03:38:50,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10590 states. [2024-11-14 03:38:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10590 to 10501. [2024-11-14 03:38:51,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10501 states, 6299 states have (on average 1.281949515796158) internal successors, (8075), 6477 states have internal predecessors, (8075), 2892 states have call successors, (2892), 1345 states have call predecessors, (2892), 1309 states have return successors, (2897), 2810 states have call predecessors, (2897), 2881 states have call successors, (2897) [2024-11-14 03:38:51,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10501 states to 10501 states and 13864 transitions. [2024-11-14 03:38:51,093 INFO L78 Accepts]: Start accepts. Automaton has 10501 states and 13864 transitions. Word has length 205 [2024-11-14 03:38:51,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:38:51,093 INFO L471 AbstractCegarLoop]: Abstraction has 10501 states and 13864 transitions. [2024-11-14 03:38:51,094 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2024-11-14 03:38:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 10501 states and 13864 transitions. [2024-11-14 03:38:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2024-11-14 03:38:51,098 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:38:51,099 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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] [2024-11-14 03:38:51,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-14 03:38:51,100 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:38:51,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:38:51,101 INFO L85 PathProgramCache]: Analyzing trace with hash -13218465, now seen corresponding path program 1 times [2024-11-14 03:38:51,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:38:51,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885060830] [2024-11-14 03:38:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:38:51,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:38:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:38:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-14 03:38:52,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:38:52,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885060830] [2024-11-14 03:38:52,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885060830] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:38:52,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:38:52,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:38:52,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095576060] [2024-11-14 03:38:52,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:38:52,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:38:52,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:38:52,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:38:52,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:38:52,828 INFO L87 Difference]: Start difference. First operand 10501 states and 13864 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2024-11-14 03:38:54,879 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:38:56,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:39:00,667 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:39:02,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:39:02,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:39:02,729 INFO L93 Difference]: Finished difference Result 10509 states and 13870 transitions. [2024-11-14 03:39:02,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:39:02,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 212 [2024-11-14 03:39:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:39:02,784 INFO L225 Difference]: With dead ends: 10509 [2024-11-14 03:39:02,784 INFO L226 Difference]: Without dead ends: 10506 [2024-11-14 03:39:02,789 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:39:02,790 INFO L432 NwaCegarLoop]: 1164 mSDtfsCounter, 266 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 2131 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2024-11-14 03:39:02,790 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 2131 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 250 Invalid, 4 Unknown, 0 Unchecked, 9.5s Time] [2024-11-14 03:39:02,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10506 states. [2024-11-14 03:39:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10506 to 10500. [2024-11-14 03:39:03,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10500 states, 6299 states have (on average 1.279885696142245) internal successors, (8062), 6476 states have internal predecessors, (8062), 2891 states have call successors, (2891), 1345 states have call predecessors, (2891), 1309 states have return successors, (2897), 2810 states have call predecessors, (2897), 2881 states have call successors, (2897) [2024-11-14 03:39:03,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10500 states to 10500 states and 13850 transitions. [2024-11-14 03:39:03,474 INFO L78 Accepts]: Start accepts. Automaton has 10500 states and 13850 transitions. Word has length 212 [2024-11-14 03:39:03,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:39:03,476 INFO L471 AbstractCegarLoop]: Abstraction has 10500 states and 13850 transitions. [2024-11-14 03:39:03,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2024-11-14 03:39:03,476 INFO L276 IsEmpty]: Start isEmpty. Operand 10500 states and 13850 transitions. [2024-11-14 03:39:03,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2024-11-14 03:39:03,483 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:39:03,483 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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] [2024-11-14 03:39:03,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 03:39:03,484 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:39:03,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:39:03,485 INFO L85 PathProgramCache]: Analyzing trace with hash 616274915, now seen corresponding path program 1 times [2024-11-14 03:39:03,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:39:03,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963850630] [2024-11-14 03:39:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:39:03,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:39:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:39:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2024-11-14 03:39:05,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:39:05,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963850630] [2024-11-14 03:39:05,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963850630] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:39:05,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:39:05,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 03:39:05,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907451317] [2024-11-14 03:39:05,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:39:05,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:39:05,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:39:05,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:39:05,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:39:05,541 INFO L87 Difference]: Start difference. First operand 10500 states and 13850 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2024-11-14 03:39:07,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:39:09,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:39:12,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:39:12,729 INFO L93 Difference]: Finished difference Result 24415 states and 32170 transitions. [2024-11-14 03:39:12,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:39:12,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 225 [2024-11-14 03:39:12,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:39:12,819 INFO L225 Difference]: With dead ends: 24415 [2024-11-14 03:39:12,819 INFO L226 Difference]: Without dead ends: 14050 [2024-11-14 03:39:12,858 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:39:12,859 INFO L432 NwaCegarLoop]: 1415 mSDtfsCounter, 973 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:39:12,859 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [973 Valid, 2420 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 267 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2024-11-14 03:39:12,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14050 states. [2024-11-14 03:39:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14050 to 14024. [2024-11-14 03:39:13,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14024 states, 8537 states have (on average 1.283706219983601) internal successors, (10959), 8784 states have internal predecessors, (10959), 3707 states have call successors, (3707), 1819 states have call predecessors, (3707), 1779 states have return successors, (3721), 3610 states have call predecessors, (3721), 3697 states have call successors, (3721) [2024-11-14 03:39:13,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14024 states to 14024 states and 18387 transitions. [2024-11-14 03:39:13,976 INFO L78 Accepts]: Start accepts. Automaton has 14024 states and 18387 transitions. Word has length 225 [2024-11-14 03:39:13,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:39:13,976 INFO L471 AbstractCegarLoop]: Abstraction has 14024 states and 18387 transitions. [2024-11-14 03:39:13,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2024-11-14 03:39:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 14024 states and 18387 transitions. [2024-11-14 03:39:13,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2024-11-14 03:39:13,984 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:39:13,984 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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] [2024-11-14 03:39:13,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-14 03:39:13,985 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:39:13,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:39:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash 720748410, now seen corresponding path program 1 times [2024-11-14 03:39:13,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:39:13,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484525433] [2024-11-14 03:39:13,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:39:13,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:39:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:39:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-14 03:39:16,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:39:16,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484525433] [2024-11-14 03:39:16,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484525433] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:39:16,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:39:16,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:39:16,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481768715] [2024-11-14 03:39:16,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:39:16,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:39:16,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:39:16,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:39:16,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:39:16,718 INFO L87 Difference]: Start difference. First operand 14024 states and 18387 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2024-11-14 03:39:18,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:39:20,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:39:22,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:39:28,615 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:39:30,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:39:32,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:39:34,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:39:34,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:39:34,833 INFO L93 Difference]: Finished difference Result 33816 states and 44395 transitions. [2024-11-14 03:39:34,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:39:34,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 233 [2024-11-14 03:39:34,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:39:34,947 INFO L225 Difference]: With dead ends: 33816 [2024-11-14 03:39:34,947 INFO L226 Difference]: Without dead ends: 19927 [2024-11-14 03:39:34,998 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:39:34,998 INFO L432 NwaCegarLoop]: 1889 mSDtfsCounter, 1685 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 497 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 2900 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 497 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:39:34,999 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1685 Valid, 2900 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [497 Valid, 327 Invalid, 7 Unknown, 0 Unchecked, 17.1s Time] [2024-11-14 03:39:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19927 states. [2024-11-14 03:39:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19927 to 19814. [2024-11-14 03:39:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19814 states, 12111 states have (on average 1.2881677813557924) internal successors, (15601), 12472 states have internal predecessors, (15601), 5182 states have call successors, (5182), 2579 states have call predecessors, (5182), 2520 states have return successors, (5180), 5024 states have call predecessors, (5180), 5156 states have call successors, (5180) [2024-11-14 03:39:36,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19814 states to 19814 states and 25963 transitions. [2024-11-14 03:39:36,589 INFO L78 Accepts]: Start accepts. Automaton has 19814 states and 25963 transitions. Word has length 233 [2024-11-14 03:39:36,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:39:36,590 INFO L471 AbstractCegarLoop]: Abstraction has 19814 states and 25963 transitions. [2024-11-14 03:39:36,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 3 states have call successors, (33), 3 states have call predecessors, (33), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2024-11-14 03:39:36,591 INFO L276 IsEmpty]: Start isEmpty. Operand 19814 states and 25963 transitions. [2024-11-14 03:39:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2024-11-14 03:39:36,600 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:39:36,600 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 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] [2024-11-14 03:39:36,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 03:39:36,600 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:39:36,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:39:36,601 INFO L85 PathProgramCache]: Analyzing trace with hash 652831621, now seen corresponding path program 1 times [2024-11-14 03:39:36,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:39:36,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443155439] [2024-11-14 03:39:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:39:36,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:39:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:39:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2024-11-14 03:39:39,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:39:39,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443155439] [2024-11-14 03:39:39,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443155439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:39:39,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136498909] [2024-11-14 03:39:39,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:39:39,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:39:39,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:39:39,402 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:39:39,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:39:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:39:42,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 3575 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-14 03:39:42,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:39:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2024-11-14 03:39:45,401 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:39:45,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136498909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:39:45,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:39:45,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-14 03:39:45,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087269065] [2024-11-14 03:39:45,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:39:45,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:39:45,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:39:45,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:39:45,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:39:45,404 INFO L87 Difference]: Start difference. First operand 19814 states and 25963 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2024-11-14 03:39:47,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:39:49,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:39:51,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:02,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:04,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:06,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:08,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:10,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:12,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:13,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:40:13,075 INFO L93 Difference]: Finished difference Result 42372 states and 55540 transitions. [2024-11-14 03:40:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:40:13,076 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) Word has length 235 [2024-11-14 03:40:13,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:40:13,205 INFO L225 Difference]: With dead ends: 42372 [2024-11-14 03:40:13,205 INFO L226 Difference]: Without dead ends: 22693 [2024-11-14 03:40:13,278 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:40:13,279 INFO L432 NwaCegarLoop]: 1342 mSDtfsCounter, 2000 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 268 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2005 SdHoareTripleChecker+Valid, 3082 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:40:13,280 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2005 Valid, 3082 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1232 Invalid, 9 Unknown, 0 Unchecked, 25.6s Time] [2024-11-14 03:40:13,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22693 states. [2024-11-14 03:40:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22693 to 22360. [2024-11-14 03:40:14,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22360 states, 13769 states have (on average 1.2920328273658217) internal successors, (17790), 14188 states have internal predecessors, (17790), 5750 states have call successors, (5750), 2899 states have call predecessors, (5750), 2840 states have return successors, (5764), 5576 states have call predecessors, (5764), 5724 states have call successors, (5764) [2024-11-14 03:40:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22360 states to 22360 states and 29304 transitions. [2024-11-14 03:40:14,947 INFO L78 Accepts]: Start accepts. Automaton has 22360 states and 29304 transitions. Word has length 235 [2024-11-14 03:40:14,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:40:14,948 INFO L471 AbstractCegarLoop]: Abstraction has 22360 states and 29304 transitions. [2024-11-14 03:40:14,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (32), 3 states have call predecessors, (32), 3 states have return successors, (30), 3 states have call predecessors, (30), 3 states have call successors, (30) [2024-11-14 03:40:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 22360 states and 29304 transitions. [2024-11-14 03:40:14,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2024-11-14 03:40:14,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:40:14,958 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 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, 1] [2024-11-14 03:40:14,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:40:15,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 03:40:15,159 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:40:15,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:40:15,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1984884887, now seen corresponding path program 1 times [2024-11-14 03:40:15,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:40:15,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712198462] [2024-11-14 03:40:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:40:15,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:40:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:40:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2024-11-14 03:40:17,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:40:17,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712198462] [2024-11-14 03:40:17,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712198462] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:40:17,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:40:17,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 03:40:17,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872451546] [2024-11-14 03:40:17,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:40:17,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 03:40:17,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:40:17,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 03:40:17,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-14 03:40:17,321 INFO L87 Difference]: Start difference. First operand 22360 states and 29304 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 4 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2024-11-14 03:40:19,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:21,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:23,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:37,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:39,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:41,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:41,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:40:41,460 INFO L93 Difference]: Finished difference Result 44737 states and 58595 transitions. [2024-11-14 03:40:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:40:41,461 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 4 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) Word has length 245 [2024-11-14 03:40:41,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:40:41,591 INFO L225 Difference]: With dead ends: 44737 [2024-11-14 03:40:41,591 INFO L226 Difference]: Without dead ends: 22504 [2024-11-14 03:40:41,666 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-14 03:40:41,667 INFO L432 NwaCegarLoop]: 680 mSDtfsCounter, 1297 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 756 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1517 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:40:41,667 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1517 Valid, 1918 Invalid, 2507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 1745 Invalid, 6 Unknown, 0 Unchecked, 22.6s Time] [2024-11-14 03:40:41,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22504 states. [2024-11-14 03:40:43,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22504 to 22155. [2024-11-14 03:40:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22155 states, 13651 states have (on average 1.290894439967768) internal successors, (17622), 14103 states have internal predecessors, (17622), 5681 states have call successors, (5681), 2830 states have call predecessors, (5681), 2822 states have return successors, (5719), 5525 states have call predecessors, (5719), 5655 states have call successors, (5719) [2024-11-14 03:40:43,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22155 states to 22155 states and 29022 transitions. [2024-11-14 03:40:43,295 INFO L78 Accepts]: Start accepts. Automaton has 22155 states and 29022 transitions. Word has length 245 [2024-11-14 03:40:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:40:43,296 INFO L471 AbstractCegarLoop]: Abstraction has 22155 states and 29022 transitions. [2024-11-14 03:40:43,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 4 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (31), 3 states have call predecessors, (31), 3 states have call successors, (31) [2024-11-14 03:40:43,296 INFO L276 IsEmpty]: Start isEmpty. Operand 22155 states and 29022 transitions. [2024-11-14 03:40:43,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2024-11-14 03:40:43,306 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:40:43,306 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 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] [2024-11-14 03:40:43,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-14 03:40:43,306 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:40:43,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:40:43,307 INFO L85 PathProgramCache]: Analyzing trace with hash -161651812, now seen corresponding path program 1 times [2024-11-14 03:40:43,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:40:43,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538401262] [2024-11-14 03:40:43,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:40:43,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:40:44,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:40:45,196 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2024-11-14 03:40:45,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:40:45,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538401262] [2024-11-14 03:40:45,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538401262] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:40:45,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:40:45,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:40:45,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826264509] [2024-11-14 03:40:45,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:40:45,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:40:45,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:40:45,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:40:45,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:40:45,198 INFO L87 Difference]: Start difference. First operand 22155 states and 29022 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2024-11-14 03:40:47,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:49,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:51,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:56,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:40:58,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:41:00,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:41:02,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:41:02,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:41:02,912 INFO L93 Difference]: Finished difference Result 41786 states and 54185 transitions. [2024-11-14 03:41:02,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:41:02,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 246 [2024-11-14 03:41:02,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:41:03,012 INFO L225 Difference]: With dead ends: 41786 [2024-11-14 03:41:03,012 INFO L226 Difference]: Without dead ends: 19766 [2024-11-14 03:41:03,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:41:03,081 INFO L432 NwaCegarLoop]: 1765 mSDtfsCounter, 957 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 4 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 3676 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.6s IncrementalHoareTripleChecker+Time [2024-11-14 03:41:03,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 3676 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 438 Invalid, 7 Unknown, 0 Unchecked, 16.6s Time] [2024-11-14 03:41:03,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19766 states. [2024-11-14 03:41:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19766 to 19618. [2024-11-14 03:41:04,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19618 states, 12032 states have (on average 1.2801695478723405) internal successors, (15403), 12415 states have internal predecessors, (15403), 4853 states have call successors, (4853), 2730 states have call predecessors, (4853), 2732 states have return successors, (4900), 4734 states have call predecessors, (4900), 4836 states have call successors, (4900) [2024-11-14 03:41:04,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19618 states to 19618 states and 25156 transitions. [2024-11-14 03:41:04,801 INFO L78 Accepts]: Start accepts. Automaton has 19618 states and 25156 transitions. Word has length 246 [2024-11-14 03:41:04,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:41:04,802 INFO L471 AbstractCegarLoop]: Abstraction has 19618 states and 25156 transitions. [2024-11-14 03:41:04,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (32), 3 states have call predecessors, (32), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2024-11-14 03:41:04,802 INFO L276 IsEmpty]: Start isEmpty. Operand 19618 states and 25156 transitions. [2024-11-14 03:41:04,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2024-11-14 03:41:04,811 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:41:04,811 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 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] [2024-11-14 03:41:04,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-14 03:41:04,811 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:41:04,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:41:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1436947959, now seen corresponding path program 1 times [2024-11-14 03:41:04,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:41:04,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513514604] [2024-11-14 03:41:04,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:04,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:41:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2024-11-14 03:41:06,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:41:06,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513514604] [2024-11-14 03:41:06,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513514604] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:41:06,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:41:06,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 03:41:06,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523585900] [2024-11-14 03:41:06,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:41:06,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:41:06,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:41:06,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:41:06,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:41:06,858 INFO L87 Difference]: Start difference. First operand 19618 states and 25156 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2024-11-14 03:41:08,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:41:15,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:41:17,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:41:19,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:41:21,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:41:21,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:41:21,414 INFO L93 Difference]: Finished difference Result 39213 states and 50302 transitions. [2024-11-14 03:41:21,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 03:41:21,415 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) Word has length 248 [2024-11-14 03:41:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:41:21,522 INFO L225 Difference]: With dead ends: 39213 [2024-11-14 03:41:21,522 INFO L226 Difference]: Without dead ends: 19692 [2024-11-14 03:41:21,584 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 03:41:21,585 INFO L432 NwaCegarLoop]: 1210 mSDtfsCounter, 1504 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 477 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:41:21,585 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1507 Valid, 2054 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 264 Invalid, 5 Unknown, 0 Unchecked, 12.8s Time] [2024-11-14 03:41:21,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19692 states. [2024-11-14 03:41:23,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19692 to 19578. [2024-11-14 03:41:23,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19578 states, 12017 states have (on average 1.2784388782558043) internal successors, (15363), 12411 states have internal predecessors, (15363), 4848 states have call successors, (4848), 2704 states have call predecessors, (4848), 2712 states have return successors, (4895), 4724 states have call predecessors, (4895), 4831 states have call successors, (4895) [2024-11-14 03:41:23,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19578 states to 19578 states and 25106 transitions. [2024-11-14 03:41:23,837 INFO L78 Accepts]: Start accepts. Automaton has 19578 states and 25106 transitions. Word has length 248 [2024-11-14 03:41:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:41:23,838 INFO L471 AbstractCegarLoop]: Abstraction has 19578 states and 25106 transitions. [2024-11-14 03:41:23,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 3 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29) [2024-11-14 03:41:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 19578 states and 25106 transitions. [2024-11-14 03:41:23,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2024-11-14 03:41:23,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:41:23,845 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2024-11-14 03:41:23,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-14 03:41:23,845 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:41:23,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:41:23,845 INFO L85 PathProgramCache]: Analyzing trace with hash -479558516, now seen corresponding path program 1 times [2024-11-14 03:41:23,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:41:23,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634582153] [2024-11-14 03:41:23,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:23,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:41:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2024-11-14 03:41:26,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:41:26,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634582153] [2024-11-14 03:41:26,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634582153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:41:26,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930576905] [2024-11-14 03:41:26,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:41:26,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:41:26,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:41:26,997 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:41:26,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:41:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:41:30,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 3770 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-14 03:41:30,281 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:41:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 216 proven. 0 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2024-11-14 03:41:33,608 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 03:41:33,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930576905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:41:33,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 03:41:33,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2024-11-14 03:41:33,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142151245] [2024-11-14 03:41:33,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:41:33,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 03:41:33,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:41:33,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 03:41:33,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-14 03:41:33,612 INFO L87 Difference]: Start difference. First operand 19578 states and 25106 transitions. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 6 states have internal predecessors, (92), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) [2024-11-14 03:41:35,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:41:37,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:41:39,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:41:41,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:41:43,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:41:45,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:04,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:06,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:09,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:11,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:13,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:15,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:17,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:19,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:21,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:23,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:25,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:25,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:42:25,910 INFO L93 Difference]: Finished difference Result 41111 states and 52710 transitions. [2024-11-14 03:42:25,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 03:42:25,911 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 6 states have internal predecessors, (92), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) Word has length 254 [2024-11-14 03:42:25,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:42:25,997 INFO L225 Difference]: With dead ends: 41111 [2024-11-14 03:42:25,997 INFO L226 Difference]: Without dead ends: 21668 [2024-11-14 03:42:26,035 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-14 03:42:26,036 INFO L432 NwaCegarLoop]: 1396 mSDtfsCounter, 1612 mSDsluCounter, 4307 mSDsCounter, 0 mSdLazyCounter, 3259 mSolverCounterSat, 47 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 5703 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 3259 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.8s IncrementalHoareTripleChecker+Time [2024-11-14 03:42:26,036 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1644 Valid, 5703 Invalid, 3323 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [47 Valid, 3259 Invalid, 17 Unknown, 0 Unchecked, 50.8s Time] [2024-11-14 03:42:26,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21668 states. [2024-11-14 03:42:27,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21668 to 19632. [2024-11-14 03:42:27,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19632 states, 12041 states have (on average 1.2778838966863217) internal successors, (15387), 12435 states have internal predecessors, (15387), 4872 states have call successors, (4872), 2704 states have call predecessors, (4872), 2718 states have return successors, (4925), 4754 states have call predecessors, (4925), 4855 states have call successors, (4925) [2024-11-14 03:42:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19632 states to 19632 states and 25184 transitions. [2024-11-14 03:42:27,261 INFO L78 Accepts]: Start accepts. Automaton has 19632 states and 25184 transitions. Word has length 254 [2024-11-14 03:42:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:42:27,262 INFO L471 AbstractCegarLoop]: Abstraction has 19632 states and 25184 transitions. [2024-11-14 03:42:27,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 6 states have internal predecessors, (92), 4 states have call successors, (35), 3 states have call predecessors, (35), 4 states have return successors, (33), 5 states have call predecessors, (33), 4 states have call successors, (33) [2024-11-14 03:42:27,262 INFO L276 IsEmpty]: Start isEmpty. Operand 19632 states and 25184 transitions. [2024-11-14 03:42:27,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2024-11-14 03:42:27,285 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:42:27,286 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:42:27,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 03:42:27,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:42:27,486 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:42:27,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:42:27,487 INFO L85 PathProgramCache]: Analyzing trace with hash -247714905, now seen corresponding path program 1 times [2024-11-14 03:42:27,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:42:27,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699194490] [2024-11-14 03:42:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:42:27,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:42:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:42:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 571 trivial. 0 not checked. [2024-11-14 03:42:29,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:42:29,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699194490] [2024-11-14 03:42:29,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699194490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:42:29,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778739971] [2024-11-14 03:42:29,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:42:29,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:42:29,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:42:29,219 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:42:29,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:42:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:42:32,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 3872 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 03:42:32,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:42:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 225 proven. 2 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2024-11-14 03:42:33,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:42:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2024-11-14 03:42:35,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778739971] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:42:35,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:42:35,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 5] total 11 [2024-11-14 03:42:35,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954589312] [2024-11-14 03:42:35,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:42:35,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 03:42:35,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:42:35,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 03:42:35,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:42:35,906 INFO L87 Difference]: Start difference. First operand 19632 states and 25184 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2024-11-14 03:42:37,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:39,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:49,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-14 03:42:50,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:42:50,202 INFO L93 Difference]: Finished difference Result 45523 states and 58314 transitions. [2024-11-14 03:42:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 03:42:50,203 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) Word has length 290 [2024-11-14 03:42:50,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:42:50,542 INFO L225 Difference]: With dead ends: 45523 [2024-11-14 03:42:50,542 INFO L226 Difference]: Without dead ends: 26026 [2024-11-14 03:42:50,585 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 576 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-11-14 03:42:50,586 INFO L432 NwaCegarLoop]: 1138 mSDtfsCounter, 1158 mSDsluCounter, 3181 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 23 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 4319 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2024-11-14 03:42:50,586 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1163 Valid, 4319 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1118 Invalid, 3 Unknown, 0 Unchecked, 12.9s Time] [2024-11-14 03:42:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26026 states. [2024-11-14 03:42:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26026 to 25764. [2024-11-14 03:42:52,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25764 states, 15868 states have (on average 1.2812578774892867) internal successors, (20331), 16389 states have internal predecessors, (20331), 6269 states have call successors, (6269), 3616 states have call predecessors, (6269), 3626 states have return successors, (6346), 6110 states have call predecessors, (6346), 6252 states have call successors, (6346) [2024-11-14 03:42:52,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25764 states to 25764 states and 32946 transitions. [2024-11-14 03:42:52,170 INFO L78 Accepts]: Start accepts. Automaton has 25764 states and 32946 transitions. Word has length 290 [2024-11-14 03:42:52,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:42:52,171 INFO L471 AbstractCegarLoop]: Abstraction has 25764 states and 32946 transitions. [2024-11-14 03:42:52,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 3 states have call predecessors, (38), 3 states have call successors, (38) [2024-11-14 03:42:52,171 INFO L276 IsEmpty]: Start isEmpty. Operand 25764 states and 32946 transitions. [2024-11-14 03:42:52,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2024-11-14 03:42:52,217 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:42:52,217 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:42:52,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 03:42:52,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5e1aed3f-a6d9-4c28-8e64-d71e7e181f04/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:42:52,419 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:42:52,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:42:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1474413270, now seen corresponding path program 1 times [2024-11-14 03:42:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:42:52,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942559638] [2024-11-14 03:42:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:42:52,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:42:54,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat