./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--input--serio--serio_raw.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--serio--serio_raw.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash b1b2a361b7351c4ac2fc0213f47206309b2fae43ca25ec3cefac8a1c8b001422 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:34:53,635 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:34:53,717 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 20:34:53,723 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:34:53,723 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:34:53,751 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:34:53,752 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:34:53,752 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:34:53,753 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:34:53,754 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:34:53,754 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:34:53,755 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:34:53,756 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:34:53,756 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:34:53,757 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:34:53,758 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:34:53,758 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:34:53,759 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:34:53,759 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:34:53,760 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:34:53,760 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:34:53,761 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:34:53,762 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:34:53,762 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:34:53,763 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:34:53,763 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:34:53,764 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:34:53,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:34:53,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:34:53,765 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:34:53,765 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:34:53,766 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:34:53,766 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:34:53,767 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:34:53,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:53,768 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:34:53,768 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:34:53,769 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:34:53,769 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:34:53,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:34:53,770 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:34:53,771 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:34:53,771 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:34:53,771 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:34:53,772 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1b2a361b7351c4ac2fc0213f47206309b2fae43ca25ec3cefac8a1c8b001422 [2023-11-23 20:34:54,065 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:34:54,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:34:54,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:34:54,099 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:34:54,099 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:34:54,101 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--serio--serio_raw.ko-entry_point.cil.out.i [2023-11-23 20:34:57,381 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:34:57,867 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:34:57,867 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--serio--serio_raw.ko-entry_point.cil.out.i [2023-11-23 20:34:57,913 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/data/0ec265100/ff83c2ee58274a419b39a748c6af3297/FLAGbd53e5481 [2023-11-23 20:34:57,928 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/data/0ec265100/ff83c2ee58274a419b39a748c6af3297 [2023-11-23 20:34:57,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:34:57,936 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:34:57,940 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:57,941 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:34:57,946 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:34:57,948 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:57" (1/1) ... [2023-11-23 20:34:57,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f02eee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:57, skipping insertion in model container [2023-11-23 20:34:57,950 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:57" (1/1) ... [2023-11-23 20:34:58,056 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:34:59,274 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--serio--serio_raw.ko-entry_point.cil.out.i[129978,129991] [2023-11-23 20:34:59,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:59,462 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:34:59,593 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; subl %2, %0; sete %1": "+m" (v->counter), "=qm" (c): "er" (i): "memory"); [3226-3227] [2023-11-23 20:34:59,596 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; xaddb %b0, %1\n": "+q" (__ret), "+m" (v->counter): : "memory", "cc"); [3238-3239] [2023-11-23 20:34:59,597 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; xaddw %w0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [3242-3243] [2023-11-23 20:34:59,597 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; xaddl %0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [3246-3247] [2023-11-23 20:34:59,598 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; xaddq %q0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [3250-3251] [2023-11-23 20:34:59,693 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu): "0" (__pu_val), "c" (tmp): "ebx"); [3767] [2023-11-23 20:34:59,696 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu): "0" (__pu_val), "c" (tmp___0): "ebx"); [3772] [2023-11-23 20:34:59,698 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu): "0" (__pu_val), "c" (tmp___1): "ebx"); [3777] [2023-11-23 20:34:59,698 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu): "0" (__pu_val), "c" (tmp___2): "ebx"); [3782] [2023-11-23 20:34:59,699 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu): "0" (__pu_val), "c" (tmp___3): "ebx"); [3787] [2023-11-23 20:34:59,712 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __get_user_%P3": "=a" (__ret_gu), "=r" (__val_gu): "0" (tmp), "i" (1UL)); [3886-3887] [2023-11-23 20:34:59,761 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--input--serio--serio_raw.ko-entry_point.cil.out.i[129978,129991] [2023-11-23 20:34:59,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:59,893 WARN L675 CHandler]: The function __xadd_wrong_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:34:59,901 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:34:59,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59 WrapperNode [2023-11-23 20:34:59,901 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:59,902 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:59,902 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:34:59,903 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:34:59,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2023-11-23 20:34:59,986 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2023-11-23 20:35:00,104 INFO L138 Inliner]: procedures = 188, calls = 552, calls flagged for inlining = 73, calls inlined = 68, statements flattened = 1631 [2023-11-23 20:35:00,105 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:35:00,106 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:35:00,106 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:35:00,106 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:35:00,115 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2023-11-23 20:35:00,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2023-11-23 20:35:00,141 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2023-11-23 20:35:00,142 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2023-11-23 20:35:00,226 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2023-11-23 20:35:00,236 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2023-11-23 20:35:00,245 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2023-11-23 20:35:00,255 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2023-11-23 20:35:00,272 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:35:00,273 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:35:00,273 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:35:00,273 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:35:00,274 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (1/1) ... [2023-11-23 20:35:00,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:35:00,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:00,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:35:00,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:35:00,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_serio_raw_mutex [2023-11-23 20:35:00,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_serio_raw_mutex [2023-11-23 20:35:00,361 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2023-11-23 20:35:00,361 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2023-11-23 20:35:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 20:35:00,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 20:35:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:35:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-23 20:35:00,363 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-23 20:35:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 20:35:00,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 20:35:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 20:35:00,365 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 20:35:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure kill_fasync [2023-11-23 20:35:00,366 INFO L138 BoogieDeclarations]: Found implementation of procedure kill_fasync [2023-11-23 20:35:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2023-11-23 20:35:00,366 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2023-11-23 20:35:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2023-11-23 20:35:00,369 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2023-11-23 20:35:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:35:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 20:35:00,369 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 20:35:00,370 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 20:35:00,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 20:35:00,371 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-11-23 20:35:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-11-23 20:35:00,371 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2023-11-23 20:35:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2023-11-23 20:35:00,371 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 20:35:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 20:35:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure serio_raw_disconnect [2023-11-23 20:35:00,372 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_raw_disconnect [2023-11-23 20:35:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure serio_continue_rx [2023-11-23 20:35:00,372 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_continue_rx [2023-11-23 20:35:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-23 20:35:00,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-23 20:35:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 20:35:00,373 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 20:35:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:35:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure serio_raw_poll [2023-11-23 20:35:00,373 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_raw_poll [2023-11-23 20:35:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-11-23 20:35:00,374 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-11-23 20:35:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-23 20:35:00,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-23 20:35:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:35:00,374 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-23 20:35:00,374 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-23 20:35:00,375 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:35:00,375 INFO L130 BoogieDeclarations]: Found specification of procedure serio_set_drvdata [2023-11-23 20:35:00,376 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_set_drvdata [2023-11-23 20:35:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:35:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-23 20:35:00,377 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-23 20:35:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 20:35:00,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-23 20:35:00,377 INFO L130 BoogieDeclarations]: Found specification of procedure misc_register [2023-11-23 20:35:00,378 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_register [2023-11-23 20:35:00,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:35:00,378 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-23 20:35:00,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-23 20:35:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2023-11-23 20:35:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure serio_pause_rx [2023-11-23 20:35:00,379 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_pause_rx [2023-11-23 20:35:00,379 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2023-11-23 20:35:00,379 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2023-11-23 20:35:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_add_return [2023-11-23 20:35:00,380 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_add_return [2023-11-23 20:35:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:35:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:35:00,380 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_file_operations_2 [2023-11-23 20:35:00,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_file_operations_2 [2023-11-23 20:35:00,381 INFO L130 BoogieDeclarations]: Found specification of procedure serio_get_drvdata [2023-11-23 20:35:00,381 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_get_drvdata [2023-11-23 20:35:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-11-23 20:35:00,382 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-11-23 20:35:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_serio_raw_mutex [2023-11-23 20:35:00,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_serio_raw_mutex [2023-11-23 20:35:00,382 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2023-11-23 20:35:00,382 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2023-11-23 20:35:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-23 20:35:00,383 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-23 20:35:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure serio_close [2023-11-23 20:35:00,383 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_close [2023-11-23 20:35:00,383 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_serio_raw_mutex [2023-11-23 20:35:00,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_serio_raw_mutex [2023-11-23 20:35:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:35:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure serio_raw_write [2023-11-23 20:35:00,384 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_raw_write [2023-11-23 20:35:00,384 INFO L130 BoogieDeclarations]: Found specification of procedure serio_raw_fasync [2023-11-23 20:35:00,384 INFO L138 BoogieDeclarations]: Found implementation of procedure serio_raw_fasync [2023-11-23 20:35:00,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:35:00,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:35:00,761 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:35:00,765 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:35:00,956 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 20:35:02,282 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:35:02,646 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:35:02,646 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:35:02,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:02 BoogieIcfgContainer [2023-11-23 20:35:02,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:35:02,651 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:35:02,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:35:02,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:35:02,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:34:57" (1/3) ... [2023-11-23 20:35:02,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49074a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:02, skipping insertion in model container [2023-11-23 20:35:02,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:59" (2/3) ... [2023-11-23 20:35:02,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49074a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:02, skipping insertion in model container [2023-11-23 20:35:02,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:02" (3/3) ... [2023-11-23 20:35:02,658 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--input--serio--serio_raw.ko-entry_point.cil.out.i [2023-11-23 20:35:02,680 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:35:02,680 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:35:02,745 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:35:02,752 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@29dd3fd6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:35:02,753 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:35:02,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 404 states, 248 states have (on average 1.3669354838709677) internal successors, (339), 269 states have internal predecessors, (339), 115 states have call successors, (115), 40 states have call predecessors, (115), 39 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2023-11-23 20:35:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-23 20:35:02,776 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:02,777 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:02,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:02,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:02,784 INFO L85 PathProgramCache]: Analyzing trace with hash 2037058984, now seen corresponding path program 1 times [2023-11-23 20:35:02,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:02,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179775908] [2023-11-23 20:35:02,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:02,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-23 20:35:03,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:03,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179775908] [2023-11-23 20:35:03,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179775908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:03,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:03,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:03,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359653100] [2023-11-23 20:35:03,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:03,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:03,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:03,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:03,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:03,844 INFO L87 Difference]: Start difference. First operand has 404 states, 248 states have (on average 1.3669354838709677) internal successors, (339), 269 states have internal predecessors, (339), 115 states have call successors, (115), 40 states have call predecessors, (115), 39 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-23 20:35:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:04,456 INFO L93 Difference]: Finished difference Result 1130 states and 1609 transitions. [2023-11-23 20:35:04,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:04,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) Word has length 123 [2023-11-23 20:35:04,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:04,492 INFO L225 Difference]: With dead ends: 1130 [2023-11-23 20:35:04,492 INFO L226 Difference]: Without dead ends: 746 [2023-11-23 20:35:04,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:04,504 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 485 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:04,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 958 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:35:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2023-11-23 20:35:04,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 740. [2023-11-23 20:35:04,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 465 states have (on average 1.346236559139785) internal successors, (626), 488 states have internal predecessors, (626), 199 states have call successors, (199), 76 states have call predecessors, (199), 75 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2023-11-23 20:35:04,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1016 transitions. [2023-11-23 20:35:04,744 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1016 transitions. Word has length 123 [2023-11-23 20:35:04,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:04,745 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1016 transitions. [2023-11-23 20:35:04,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 1 states have call predecessors, (16), 1 states have call successors, (16) [2023-11-23 20:35:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1016 transitions. [2023-11-23 20:35:04,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-23 20:35:04,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:04,751 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:04,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:35:04,752 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:04,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1492423458, now seen corresponding path program 1 times [2023-11-23 20:35:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:04,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022913582] [2023-11-23 20:35:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-23 20:35:05,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:05,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022913582] [2023-11-23 20:35:05,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022913582] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:05,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:05,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:05,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622580812] [2023-11-23 20:35:05,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:05,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:05,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:05,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:05,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:05,115 INFO L87 Difference]: Start difference. First operand 740 states and 1016 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 20:35:05,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:05,455 INFO L93 Difference]: Finished difference Result 742 states and 1017 transitions. [2023-11-23 20:35:05,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:05,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 127 [2023-11-23 20:35:05,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:05,464 INFO L225 Difference]: With dead ends: 742 [2023-11-23 20:35:05,464 INFO L226 Difference]: Without dead ends: 739 [2023-11-23 20:35:05,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:05,472 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 503 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:05,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 465 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:35:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2023-11-23 20:35:05,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 739. [2023-11-23 20:35:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 465 states have (on average 1.3440860215053763) internal successors, (625), 487 states have internal predecessors, (625), 198 states have call successors, (198), 76 states have call predecessors, (198), 75 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2023-11-23 20:35:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1014 transitions. [2023-11-23 20:35:05,571 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1014 transitions. Word has length 127 [2023-11-23 20:35:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:05,572 INFO L495 AbstractCegarLoop]: Abstraction has 739 states and 1014 transitions. [2023-11-23 20:35:05,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 20:35:05,572 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1014 transitions. [2023-11-23 20:35:05,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-11-23 20:35:05,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:05,585 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:05,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:35:05,585 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:05,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:05,586 INFO L85 PathProgramCache]: Analyzing trace with hash 979394698, now seen corresponding path program 1 times [2023-11-23 20:35:05,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:05,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637133187] [2023-11-23 20:35:05,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:05,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:05,907 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-23 20:35:05,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:05,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637133187] [2023-11-23 20:35:05,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637133187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:05,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:05,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:05,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54706429] [2023-11-23 20:35:05,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:05,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:05,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:05,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:05,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:05,912 INFO L87 Difference]: Start difference. First operand 739 states and 1014 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 20:35:06,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:06,143 INFO L93 Difference]: Finished difference Result 741 states and 1015 transitions. [2023-11-23 20:35:06,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:06,143 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), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 128 [2023-11-23 20:35:06,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:06,153 INFO L225 Difference]: With dead ends: 741 [2023-11-23 20:35:06,153 INFO L226 Difference]: Without dead ends: 738 [2023-11-23 20:35:06,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:06,162 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 500 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:06,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 463 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:35:06,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2023-11-23 20:35:06,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 738. [2023-11-23 20:35:06,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 465 states have (on average 1.3419354838709678) internal successors, (624), 486 states have internal predecessors, (624), 197 states have call successors, (197), 76 states have call predecessors, (197), 75 states have return successors, (191), 191 states have call predecessors, (191), 191 states have call successors, (191) [2023-11-23 20:35:06,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1012 transitions. [2023-11-23 20:35:06,236 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1012 transitions. Word has length 128 [2023-11-23 20:35:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:06,237 INFO L495 AbstractCegarLoop]: Abstraction has 738 states and 1012 transitions. [2023-11-23 20:35:06,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 20:35:06,239 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1012 transitions. [2023-11-23 20:35:06,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-23 20:35:06,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:06,242 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:06,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:35:06,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:06,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:06,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1733484303, now seen corresponding path program 1 times [2023-11-23 20:35:06,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:06,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548350530] [2023-11-23 20:35:06,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:06,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-23 20:35:06,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:06,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548350530] [2023-11-23 20:35:06,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548350530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:06,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:06,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:06,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153992597] [2023-11-23 20:35:06,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:06,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:06,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:06,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:06,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:06,511 INFO L87 Difference]: Start difference. First operand 738 states and 1012 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, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 20:35:06,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:06,932 INFO L93 Difference]: Finished difference Result 1796 states and 2422 transitions. [2023-11-23 20:35:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:06,933 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, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 132 [2023-11-23 20:35:06,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:06,943 INFO L225 Difference]: With dead ends: 1796 [2023-11-23 20:35:06,943 INFO L226 Difference]: Without dead ends: 1090 [2023-11-23 20:35:06,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:06,947 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 313 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:06,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 814 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:35:06,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2023-11-23 20:35:07,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1073. [2023-11-23 20:35:07,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 673 states have (on average 1.3298662704309063) internal successors, (895), 710 states have internal predecessors, (895), 270 states have call successors, (270), 132 states have call predecessors, (270), 129 states have return successors, (272), 256 states have call predecessors, (272), 264 states have call successors, (272) [2023-11-23 20:35:07,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1437 transitions. [2023-11-23 20:35:07,044 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1437 transitions. Word has length 132 [2023-11-23 20:35:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:07,045 INFO L495 AbstractCegarLoop]: Abstraction has 1073 states and 1437 transitions. [2023-11-23 20:35:07,045 INFO L496 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, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 20:35:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1437 transitions. [2023-11-23 20:35:07,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-23 20:35:07,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:07,047 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:07,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:35:07,048 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:07,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:07,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1766910981, now seen corresponding path program 1 times [2023-11-23 20:35:07,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:07,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075810613] [2023-11-23 20:35:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:07,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:07,244 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-23 20:35:07,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:07,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075810613] [2023-11-23 20:35:07,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075810613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:07,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:07,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:07,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794769070] [2023-11-23 20:35:07,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:07,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:07,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:07,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:07,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:07,247 INFO L87 Difference]: Start difference. First operand 1073 states and 1437 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, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 20:35:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:07,672 INFO L93 Difference]: Finished difference Result 1964 states and 2612 transitions. [2023-11-23 20:35:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:07,673 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, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 132 [2023-11-23 20:35:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:07,680 INFO L225 Difference]: With dead ends: 1964 [2023-11-23 20:35:07,681 INFO L226 Difference]: Without dead ends: 931 [2023-11-23 20:35:07,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:07,685 INFO L413 NwaCegarLoop]: 686 mSDtfsCounter, 400 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:07,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 1094 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:35:07,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-11-23 20:35:07,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 914. [2023-11-23 20:35:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 585 states have (on average 1.335042735042735) internal successors, (781), 610 states have internal predecessors, (781), 213 states have call successors, (213), 117 states have call predecessors, (213), 115 states have return successors, (214), 203 states have call predecessors, (214), 207 states have call successors, (214) [2023-11-23 20:35:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 1208 transitions. [2023-11-23 20:35:07,795 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 1208 transitions. Word has length 132 [2023-11-23 20:35:07,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:07,796 INFO L495 AbstractCegarLoop]: Abstraction has 914 states and 1208 transitions. [2023-11-23 20:35:07,796 INFO L496 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, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-23 20:35:07,796 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 1208 transitions. [2023-11-23 20:35:07,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-23 20:35:07,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:07,798 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:07,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:35:07,799 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:07,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:07,799 INFO L85 PathProgramCache]: Analyzing trace with hash 296351073, now seen corresponding path program 1 times [2023-11-23 20:35:07,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:07,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249654989] [2023-11-23 20:35:07,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:07,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-23 20:35:08,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:08,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249654989] [2023-11-23 20:35:08,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249654989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:08,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:08,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:08,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577353952] [2023-11-23 20:35:08,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:08,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:08,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:08,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:08,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:08,022 INFO L87 Difference]: Start difference. First operand 914 states and 1208 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 20:35:08,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:08,286 INFO L93 Difference]: Finished difference Result 916 states and 1209 transitions. [2023-11-23 20:35:08,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:08,287 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 129 [2023-11-23 20:35:08,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:08,294 INFO L225 Difference]: With dead ends: 916 [2023-11-23 20:35:08,295 INFO L226 Difference]: Without dead ends: 913 [2023-11-23 20:35:08,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:08,296 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 497 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:08,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 461 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:35:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2023-11-23 20:35:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 913. [2023-11-23 20:35:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 913 states, 585 states have (on average 1.3333333333333333) internal successors, (780), 609 states have internal predecessors, (780), 212 states have call successors, (212), 117 states have call predecessors, (212), 115 states have return successors, (214), 203 states have call predecessors, (214), 207 states have call successors, (214) [2023-11-23 20:35:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1206 transitions. [2023-11-23 20:35:08,381 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1206 transitions. Word has length 129 [2023-11-23 20:35:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:08,381 INFO L495 AbstractCegarLoop]: Abstraction has 913 states and 1206 transitions. [2023-11-23 20:35:08,382 INFO L496 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 20:35:08,382 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1206 transitions. [2023-11-23 20:35:08,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-11-23 20:35:08,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:08,384 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:08,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:35:08,384 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:08,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:08,385 INFO L85 PathProgramCache]: Analyzing trace with hash 596840045, now seen corresponding path program 1 times [2023-11-23 20:35:08,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:08,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038965166] [2023-11-23 20:35:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:08,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2023-11-23 20:35:08,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:08,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038965166] [2023-11-23 20:35:08,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038965166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:08,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:08,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:08,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129627635] [2023-11-23 20:35:08,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:08,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:08,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:08,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:08,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:08,636 INFO L87 Difference]: Start difference. First operand 913 states and 1206 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 20:35:09,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:09,038 INFO L93 Difference]: Finished difference Result 1462 states and 1966 transitions. [2023-11-23 20:35:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:09,039 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 130 [2023-11-23 20:35:09,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:09,050 INFO L225 Difference]: With dead ends: 1462 [2023-11-23 20:35:09,050 INFO L226 Difference]: Without dead ends: 1451 [2023-11-23 20:35:09,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:09,052 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 403 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:09,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 840 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:35:09,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2023-11-23 20:35:09,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1451. [2023-11-23 20:35:09,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 954 states have (on average 1.3459119496855345) internal successors, (1284), 992 states have internal predecessors, (1284), 319 states have call successors, (319), 186 states have call predecessors, (319), 177 states have return successors, (339), 298 states have call predecessors, (339), 314 states have call successors, (339) [2023-11-23 20:35:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 1942 transitions. [2023-11-23 20:35:09,188 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 1942 transitions. Word has length 130 [2023-11-23 20:35:09,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:09,188 INFO L495 AbstractCegarLoop]: Abstraction has 1451 states and 1942 transitions. [2023-11-23 20:35:09,189 INFO L496 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, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2023-11-23 20:35:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 1942 transitions. [2023-11-23 20:35:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-11-23 20:35:09,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:09,192 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:09,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:35:09,192 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:09,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:09,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1211604761, now seen corresponding path program 1 times [2023-11-23 20:35:09,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:09,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320555056] [2023-11-23 20:35:09,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:09,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2023-11-23 20:35:09,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:09,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320555056] [2023-11-23 20:35:09,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320555056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:09,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:09,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:09,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875190130] [2023-11-23 20:35:09,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:09,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:09,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:09,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:09,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:09,555 INFO L87 Difference]: Start difference. First operand 1451 states and 1942 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-23 20:35:10,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:10,097 INFO L93 Difference]: Finished difference Result 3390 states and 4549 transitions. [2023-11-23 20:35:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:10,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) Word has length 171 [2023-11-23 20:35:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:10,113 INFO L225 Difference]: With dead ends: 3390 [2023-11-23 20:35:10,113 INFO L226 Difference]: Without dead ends: 1996 [2023-11-23 20:35:10,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:10,118 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 441 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:10,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 1094 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:35:10,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2023-11-23 20:35:10,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1975. [2023-11-23 20:35:10,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1975 states, 1326 states have (on average 1.3529411764705883) internal successors, (1794), 1369 states have internal predecessors, (1794), 408 states have call successors, (408), 252 states have call predecessors, (408), 240 states have return successors, (438), 384 states have call predecessors, (438), 403 states have call successors, (438) [2023-11-23 20:35:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1975 states to 1975 states and 2640 transitions. [2023-11-23 20:35:10,287 INFO L78 Accepts]: Start accepts. Automaton has 1975 states and 2640 transitions. Word has length 171 [2023-11-23 20:35:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:10,287 INFO L495 AbstractCegarLoop]: Abstraction has 1975 states and 2640 transitions. [2023-11-23 20:35:10,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (22), 3 states have call predecessors, (22), 3 states have call successors, (22) [2023-11-23 20:35:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1975 states and 2640 transitions. [2023-11-23 20:35:10,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2023-11-23 20:35:10,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:10,292 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2023-11-23 20:35:10,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 20:35:10,292 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:10,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:10,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2127342987, now seen corresponding path program 1 times [2023-11-23 20:35:10,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:10,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012019891] [2023-11-23 20:35:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:10,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-11-23 20:35:11,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:11,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012019891] [2023-11-23 20:35:11,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012019891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:11,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:11,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:35:11,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761300749] [2023-11-23 20:35:11,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:11,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:35:11,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:35:11,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:35:11,167 INFO L87 Difference]: Start difference. First operand 1975 states and 2640 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-23 20:35:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:11,649 INFO L93 Difference]: Finished difference Result 1988 states and 2657 transitions. [2023-11-23 20:35:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:35:11,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) Word has length 186 [2023-11-23 20:35:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:11,665 INFO L225 Difference]: With dead ends: 1988 [2023-11-23 20:35:11,665 INFO L226 Difference]: Without dead ends: 1985 [2023-11-23 20:35:11,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:35:11,669 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 26 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:11,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 891 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:35:11,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2023-11-23 20:35:11,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1981. [2023-11-23 20:35:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1330 states have (on average 1.349624060150376) internal successors, (1795), 1372 states have internal predecessors, (1795), 408 states have call successors, (408), 255 states have call predecessors, (408), 242 states have return successors, (438), 384 states have call predecessors, (438), 403 states have call successors, (438) [2023-11-23 20:35:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 2641 transitions. [2023-11-23 20:35:11,865 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 2641 transitions. Word has length 186 [2023-11-23 20:35:11,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:11,866 INFO L495 AbstractCegarLoop]: Abstraction has 1981 states and 2641 transitions. [2023-11-23 20:35:11,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 3 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 2 states have call predecessors, (25), 2 states have call successors, (25) [2023-11-23 20:35:11,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 2641 transitions. [2023-11-23 20:35:11,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-11-23 20:35:11,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:11,872 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2023-11-23 20:35:11,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 20:35:11,872 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:11,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:11,873 INFO L85 PathProgramCache]: Analyzing trace with hash -2145928888, now seen corresponding path program 1 times [2023-11-23 20:35:11,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:11,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502384893] [2023-11-23 20:35:11,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:11,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2023-11-23 20:35:12,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:12,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502384893] [2023-11-23 20:35:12,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502384893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:12,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:12,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 20:35:12,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359616566] [2023-11-23 20:35:12,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:12,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:35:12,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:12,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:35:12,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:35:12,685 INFO L87 Difference]: Start difference. First operand 1981 states and 2641 transitions. Second operand has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (35), 5 states have call predecessors, (35), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-11-23 20:35:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:13,681 INFO L93 Difference]: Finished difference Result 3746 states and 5039 transitions. [2023-11-23 20:35:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:35:13,682 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (35), 5 states have call predecessors, (35), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 211 [2023-11-23 20:35:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:13,696 INFO L225 Difference]: With dead ends: 3746 [2023-11-23 20:35:13,696 INFO L226 Difference]: Without dead ends: 1822 [2023-11-23 20:35:13,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:35:13,703 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 19 mSDsluCounter, 2231 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2683 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:13,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 2683 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:35:13,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2023-11-23 20:35:13,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1822. [2023-11-23 20:35:13,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1822 states, 1249 states have (on average 1.3594875900720576) internal successors, (1698), 1285 states have internal predecessors, (1698), 363 states have call successors, (363), 218 states have call predecessors, (363), 209 states have return successors, (370), 345 states have call predecessors, (370), 358 states have call successors, (370) [2023-11-23 20:35:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2431 transitions. [2023-11-23 20:35:13,854 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2431 transitions. Word has length 211 [2023-11-23 20:35:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:13,856 INFO L495 AbstractCegarLoop]: Abstraction has 1822 states and 2431 transitions. [2023-11-23 20:35:13,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 5 states have internal predecessors, (73), 4 states have call successors, (35), 5 states have call predecessors, (35), 1 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2023-11-23 20:35:13,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2431 transitions. [2023-11-23 20:35:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2023-11-23 20:35:13,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:13,861 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:13,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 20:35:13,862 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:13,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:13,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1197396576, now seen corresponding path program 1 times [2023-11-23 20:35:13,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:13,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502675320] [2023-11-23 20:35:13,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:13,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2023-11-23 20:35:15,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:15,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502675320] [2023-11-23 20:35:15,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502675320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:15,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344718388] [2023-11-23 20:35:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:15,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:15,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:15,569 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:15,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:35:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:16,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 2129 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 20:35:16,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2023-11-23 20:35:16,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:16,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344718388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:16,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:16,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-23 20:35:16,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726393551] [2023-11-23 20:35:16,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:16,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:35:16,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:16,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:35:16,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:35:16,851 INFO L87 Difference]: Start difference. First operand 1822 states and 2431 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-11-23 20:35:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:18,348 INFO L93 Difference]: Finished difference Result 2527 states and 3402 transitions. [2023-11-23 20:35:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:35:18,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 216 [2023-11-23 20:35:18,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:18,367 INFO L225 Difference]: With dead ends: 2527 [2023-11-23 20:35:18,367 INFO L226 Difference]: Without dead ends: 2516 [2023-11-23 20:35:18,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:35:18,369 INFO L413 NwaCegarLoop]: 357 mSDtfsCounter, 369 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:18,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1072 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 20:35:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2023-11-23 20:35:18,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2463. [2023-11-23 20:35:18,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 1714 states have (on average 1.3710618436406068) internal successors, (2350), 1762 states have internal predecessors, (2350), 469 states have call successors, (469), 290 states have call predecessors, (469), 279 states have return successors, (476), 447 states have call predecessors, (476), 464 states have call successors, (476) [2023-11-23 20:35:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 3295 transitions. [2023-11-23 20:35:18,649 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 3295 transitions. Word has length 216 [2023-11-23 20:35:18,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:18,650 INFO L495 AbstractCegarLoop]: Abstraction has 2463 states and 3295 transitions. [2023-11-23 20:35:18,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 3 states have call successors, (31), 4 states have call predecessors, (31), 3 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2023-11-23 20:35:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 3295 transitions. [2023-11-23 20:35:18,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2023-11-23 20:35:18,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:18,657 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 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] [2023-11-23 20:35:18,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:18,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:18,872 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:18,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:18,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1132795328, now seen corresponding path program 1 times [2023-11-23 20:35:18,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:18,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980881996] [2023-11-23 20:35:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:18,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2023-11-23 20:35:19,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:19,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980881996] [2023-11-23 20:35:19,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980881996] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:19,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:19,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:35:19,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121125864] [2023-11-23 20:35:19,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:19,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:35:19,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:19,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:35:19,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:19,924 INFO L87 Difference]: Start difference. First operand 2463 states and 3295 transitions. Second operand has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) [2023-11-23 20:35:20,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:20,692 INFO L93 Difference]: Finished difference Result 2478 states and 3309 transitions. [2023-11-23 20:35:20,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:35:20,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) Word has length 255 [2023-11-23 20:35:20,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:20,743 INFO L225 Difference]: With dead ends: 2478 [2023-11-23 20:35:20,743 INFO L226 Difference]: Without dead ends: 2475 [2023-11-23 20:35:20,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:20,746 INFO L413 NwaCegarLoop]: 456 mSDtfsCounter, 80 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:20,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 1728 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:35:20,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2023-11-23 20:35:20,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2473. [2023-11-23 20:35:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2473 states, 1721 states have (on average 1.369552585705985) internal successors, (2357), 1767 states have internal predecessors, (2357), 469 states have call successors, (469), 295 states have call predecessors, (469), 282 states have return successors, (476), 447 states have call predecessors, (476), 464 states have call successors, (476) [2023-11-23 20:35:21,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2473 states to 2473 states and 3302 transitions. [2023-11-23 20:35:21,025 INFO L78 Accepts]: Start accepts. Automaton has 2473 states and 3302 transitions. Word has length 255 [2023-11-23 20:35:21,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:21,026 INFO L495 AbstractCegarLoop]: Abstraction has 2473 states and 3302 transitions. [2023-11-23 20:35:21,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 3 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) [2023-11-23 20:35:21,028 INFO L276 IsEmpty]: Start isEmpty. Operand 2473 states and 3302 transitions. [2023-11-23 20:35:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-11-23 20:35:21,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:21,036 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:21,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 20:35:21,037 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:21,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:21,037 INFO L85 PathProgramCache]: Analyzing trace with hash -541815873, now seen corresponding path program 1 times [2023-11-23 20:35:21,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:21,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11187406] [2023-11-23 20:35:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:21,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-11-23 20:35:21,530 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:21,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11187406] [2023-11-23 20:35:21,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11187406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:21,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:21,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:21,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830086305] [2023-11-23 20:35:21,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:21,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:21,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:21,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:21,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:21,535 INFO L87 Difference]: Start difference. First operand 2473 states and 3302 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2023-11-23 20:35:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:22,238 INFO L93 Difference]: Finished difference Result 5835 states and 7791 transitions. [2023-11-23 20:35:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:22,239 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) Word has length 263 [2023-11-23 20:35:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:22,266 INFO L225 Difference]: With dead ends: 5835 [2023-11-23 20:35:22,266 INFO L226 Difference]: Without dead ends: 3419 [2023-11-23 20:35:22,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:22,275 INFO L413 NwaCegarLoop]: 618 mSDtfsCounter, 367 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:22,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 971 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:35:22,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3419 states. [2023-11-23 20:35:22,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3419 to 3396. [2023-11-23 20:35:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 2409 states have (on average 1.360730593607306) internal successors, (3278), 2472 states have internal predecessors, (3278), 585 states have call successors, (585), 420 states have call predecessors, (585), 401 states have return successors, (592), 553 states have call predecessors, (592), 580 states have call successors, (592) [2023-11-23 20:35:22,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 4455 transitions. [2023-11-23 20:35:22,578 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 4455 transitions. Word has length 263 [2023-11-23 20:35:22,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:22,579 INFO L495 AbstractCegarLoop]: Abstraction has 3396 states and 4455 transitions. [2023-11-23 20:35:22,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (36), 2 states have call predecessors, (36), 2 states have call successors, (36) [2023-11-23 20:35:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 4455 transitions. [2023-11-23 20:35:22,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2023-11-23 20:35:22,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:22,586 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 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] [2023-11-23 20:35:22,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 20:35:22,587 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:22,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:22,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1188286160, now seen corresponding path program 1 times [2023-11-23 20:35:22,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:22,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93891938] [2023-11-23 20:35:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:22,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:23,571 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2023-11-23 20:35:23,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:23,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93891938] [2023-11-23 20:35:23,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93891938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:23,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:23,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:35:23,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396215361] [2023-11-23 20:35:23,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:23,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:35:23,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:23,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:35:23,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:23,575 INFO L87 Difference]: Start difference. First operand 3396 states and 4455 transitions. Second operand has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) [2023-11-23 20:35:24,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:24,418 INFO L93 Difference]: Finished difference Result 3418 states and 4472 transitions. [2023-11-23 20:35:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:35:24,419 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) Word has length 261 [2023-11-23 20:35:24,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:24,441 INFO L225 Difference]: With dead ends: 3418 [2023-11-23 20:35:24,441 INFO L226 Difference]: Without dead ends: 3415 [2023-11-23 20:35:24,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:24,444 INFO L413 NwaCegarLoop]: 464 mSDtfsCounter, 117 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:24,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 1646 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:35:24,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3415 states. [2023-11-23 20:35:24,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3415 to 3409. [2023-11-23 20:35:24,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3409 states, 2414 states have (on average 1.3591549295774648) internal successors, (3281), 2479 states have internal predecessors, (3281), 586 states have call successors, (586), 424 states have call predecessors, (586), 408 states have return successors, (594), 555 states have call predecessors, (594), 582 states have call successors, (594) [2023-11-23 20:35:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 4461 transitions. [2023-11-23 20:35:24,783 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 4461 transitions. Word has length 261 [2023-11-23 20:35:24,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:24,784 INFO L495 AbstractCegarLoop]: Abstraction has 3409 states and 4461 transitions. [2023-11-23 20:35:24,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (34), 2 states have call predecessors, (34), 1 states have call successors, (34) [2023-11-23 20:35:24,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 4461 transitions. [2023-11-23 20:35:24,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2023-11-23 20:35:24,792 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:24,792 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 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] [2023-11-23 20:35:24,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 20:35:24,793 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:24,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:24,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1033399489, now seen corresponding path program 1 times [2023-11-23 20:35:24,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:24,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487649669] [2023-11-23 20:35:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:24,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-11-23 20:35:25,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:25,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487649669] [2023-11-23 20:35:25,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487649669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:25,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291130460] [2023-11-23 20:35:25,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:25,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:25,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:25,526 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:25,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:35:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:26,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 2387 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:35:26,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-23 20:35:26,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:26,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291130460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:26,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:26,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-23 20:35:26,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757857182] [2023-11-23 20:35:26,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:26,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:35:26,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:26,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:35:26,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:35:26,673 INFO L87 Difference]: Start difference. First operand 3409 states and 4461 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 4 states have call successors, (38), 4 states have call predecessors, (38), 3 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2023-11-23 20:35:29,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:29,368 INFO L93 Difference]: Finished difference Result 12507 states and 17030 transitions. [2023-11-23 20:35:29,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:35:29,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 4 states have call successors, (38), 4 states have call predecessors, (38), 3 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) Word has length 265 [2023-11-23 20:35:29,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:29,463 INFO L225 Difference]: With dead ends: 12507 [2023-11-23 20:35:29,463 INFO L226 Difference]: Without dead ends: 12499 [2023-11-23 20:35:29,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:35:29,471 INFO L413 NwaCegarLoop]: 730 mSDtfsCounter, 1356 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:29,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 1903 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-23 20:35:29,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12499 states. [2023-11-23 20:35:30,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12499 to 9988. [2023-11-23 20:35:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9988 states, 7095 states have (on average 1.3627906976744186) internal successors, (9669), 7291 states have internal predecessors, (9669), 1694 states have call successors, (1694), 1244 states have call predecessors, (1694), 1198 states have return successors, (1726), 1599 states have call predecessors, (1726), 1690 states have call successors, (1726) [2023-11-23 20:35:30,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 13089 transitions. [2023-11-23 20:35:30,342 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 13089 transitions. Word has length 265 [2023-11-23 20:35:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:30,343 INFO L495 AbstractCegarLoop]: Abstraction has 9988 states and 13089 transitions. [2023-11-23 20:35:30,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 4 states have call successors, (38), 4 states have call predecessors, (38), 3 states have return successors, (37), 3 states have call predecessors, (37), 3 states have call successors, (37) [2023-11-23 20:35:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 13089 transitions. [2023-11-23 20:35:30,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2023-11-23 20:35:30,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:30,450 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:30,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:30,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 20:35:30,651 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:30,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:30,652 INFO L85 PathProgramCache]: Analyzing trace with hash -999492113, now seen corresponding path program 1 times [2023-11-23 20:35:30,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:30,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127275901] [2023-11-23 20:35:30,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:30,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2023-11-23 20:35:32,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:32,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127275901] [2023-11-23 20:35:32,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127275901] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:32,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866245619] [2023-11-23 20:35:32,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:32,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:32,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:32,112 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:32,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:35:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:32,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 2460 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 20:35:33,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2023-11-23 20:35:33,163 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:33,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866245619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:33,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:33,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2023-11-23 20:35:33,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098038114] [2023-11-23 20:35:33,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:33,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:35:33,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:33,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:35:33,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-11-23 20:35:33,166 INFO L87 Difference]: Start difference. First operand 9988 states and 13089 transitions. Second operand has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (36), 3 states have call predecessors, (36), 2 states have call successors, (36) [2023-11-23 20:35:35,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:35,183 INFO L93 Difference]: Finished difference Result 13223 states and 17516 transitions. [2023-11-23 20:35:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:35:35,184 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (36), 3 states have call predecessors, (36), 2 states have call successors, (36) Word has length 270 [2023-11-23 20:35:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:35,232 INFO L225 Difference]: With dead ends: 13223 [2023-11-23 20:35:35,232 INFO L226 Difference]: Without dead ends: 13212 [2023-11-23 20:35:35,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2023-11-23 20:35:35,239 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 422 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1967 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:35,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 1967 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 20:35:35,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13212 states. [2023-11-23 20:35:36,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13212 to 9988. [2023-11-23 20:35:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9988 states, 7095 states have (on average 1.3627906976744186) internal successors, (9669), 7291 states have internal predecessors, (9669), 1694 states have call successors, (1694), 1244 states have call predecessors, (1694), 1198 states have return successors, (1726), 1599 states have call predecessors, (1726), 1690 states have call successors, (1726) [2023-11-23 20:35:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9988 states to 9988 states and 13089 transitions. [2023-11-23 20:35:36,177 INFO L78 Accepts]: Start accepts. Automaton has 9988 states and 13089 transitions. Word has length 270 [2023-11-23 20:35:36,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:36,178 INFO L495 AbstractCegarLoop]: Abstraction has 9988 states and 13089 transitions. [2023-11-23 20:35:36,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (36), 3 states have call predecessors, (36), 2 states have call successors, (36) [2023-11-23 20:35:36,179 INFO L276 IsEmpty]: Start isEmpty. Operand 9988 states and 13089 transitions. [2023-11-23 20:35:36,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-11-23 20:35:36,189 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:36,190 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 4, 3, 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] [2023-11-23 20:35:36,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:36,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1459cc-6721-4d17-8c13-b939e729fc7d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 20:35:36,404 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:36,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:36,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1131988814, now seen corresponding path program 1 times [2023-11-23 20:35:36,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:36,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547715665] [2023-11-23 20:35:36,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:36,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat