./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--input--misc--uinput.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--input--misc--uinput.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh --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 1ef83f89a2480bb974b27f067785c3859d21a1e764735321272ad8be1e6dccbd --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:42:18,756 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:42:18,830 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 15:42:18,834 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:42:18,835 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:42:18,858 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:42:18,858 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:42:18,859 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:42:18,860 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:42:18,860 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:42:18,861 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:42:18,861 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:42:18,862 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:42:18,862 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:42:18,863 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:42:18,863 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:42:18,864 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:42:18,864 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:42:18,865 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:42:18,865 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:42:18,866 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:42:18,867 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:42:18,867 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:42:18,868 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 15:42:18,868 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:42:18,869 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:42:18,869 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 15:42:18,869 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:42:18,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 15:42:18,870 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 15:42:18,871 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:42:18,871 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:42:18,871 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:42:18,872 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:42:18,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:42:18,872 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:42:18,872 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:42:18,872 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 15:42:18,873 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:42:18,873 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:42:18,873 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:42:18,873 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 15:42:18,873 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:42:18,874 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:42:18,874 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_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ef83f89a2480bb974b27f067785c3859d21a1e764735321272ad8be1e6dccbd [2023-12-02 15:42:19,069 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:42:19,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:42:19,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:42:19,092 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:42:19,093 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:42:19,094 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--input--misc--uinput.ko-ldv_main0.cil.out.i [2023-12-02 15:42:21,882 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:42:22,265 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:42:22,265 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--input--misc--uinput.ko-ldv_main0.cil.out.i [2023-12-02 15:42:22,291 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/data/895305aaf/7047628525264800a152d54172e8e50e/FLAG165925f5f [2023-12-02 15:42:22,303 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/data/895305aaf/7047628525264800a152d54172e8e50e [2023-12-02 15:42:22,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:42:22,306 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:42:22,308 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:42:22,308 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:42:22,313 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:42:22,313 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:42:22" (1/1) ... [2023-12-02 15:42:22,314 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f62a7b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:42:22, skipping insertion in model container [2023-12-02 15:42:22,315 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:42:22" (1/1) ... [2023-12-02 15:42:22,396 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:42:23,305 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_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--input--misc--uinput.ko-ldv_main0.cil.out.i[133672,133685] [2023-12-02 15:42:23,358 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:42:23,374 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:42:23,461 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [3073] [2023-12-02 15:42:23,465 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("bt %2,%1\n\tsbb %0,%0": "=r" (oldbit): "m" (*((unsigned long *)addr)), "Ir" (nr)); [3087-3088] [2023-12-02 15:42:23,465 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [3102] [2023-12-02 15:42:23,466 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3105] [2023-12-02 15:42:23,466 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3108] [2023-12-02 15:42:23,466 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3111] [2023-12-02 15:42:23,469 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& kernel_stack)); [3173] [2023-12-02 15:42:23,470 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& kernel_stack)); [3176] [2023-12-02 15:42:23,470 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& kernel_stack)); [3179] [2023-12-02 15:42:23,470 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& kernel_stack)); [3182] [2023-12-02 15:42:23,575 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_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--input--misc--uinput.ko-ldv_main0.cil.out.i[133672,133685] [2023-12-02 15:42:23,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:42:23,632 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 15:42:23,640 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:42:23,640 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:42:23 WrapperNode [2023-12-02 15:42:23,640 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:42:23,641 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:42:23,641 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:42:23,641 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:42:23,649 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:42:23" (1/1) ... [2023-12-02 15:42:23,698 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:42:23" (1/1) ... [2023-12-02 15:42:23,844 INFO L138 Inliner]: procedures = 191, calls = 833, calls flagged for inlining = 89, calls inlined = 75, statements flattened = 2266 [2023-12-02 15:42:23,845 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:42:23,846 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:42:23,846 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:42:23,846 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:42:23,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:42:23" (1/1) ... [2023-12-02 15:42:23,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:42:23" (1/1) ... [2023-12-02 15:42:23,894 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:42:23" (1/1) ... [2023-12-02 15:42:23,894 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:42:23" (1/1) ... [2023-12-02 15:42:23,980 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:42:23" (1/1) ... [2023-12-02 15:42:23,991 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:42:23" (1/1) ... [2023-12-02 15:42:24,005 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:42:23" (1/1) ... [2023-12-02 15:42:24,015 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:42:23" (1/1) ... [2023-12-02 15:42:24,035 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:42:24,036 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:42:24,036 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:42:24,036 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:42:24,036 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:42:23" (1/1) ... [2023-12-02 15:42:24,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:42:24,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:42:24,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:42:24,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:42:24,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 15:42:24,108 INFO L130 BoogieDeclarations]: Found specification of procedure input_event_size [2023-12-02 15:42:24,109 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event_size [2023-12-02 15:42:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-12-02 15:42:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 15:42:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 15:42:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_mutex_of_uinput_device [2023-12-02 15:42:24,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_mutex_of_uinput_device [2023-12-02 15:42:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-12-02 15:42:24,110 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-12-02 15:42:24,110 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2023-12-02 15:42:24,110 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2023-12-02 15:42:24,110 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2023-12-02 15:42:24,110 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2023-12-02 15:42:24,110 INFO L130 BoogieDeclarations]: Found specification of procedure uinput_request_done [2023-12-02 15:42:24,111 INFO L138 BoogieDeclarations]: Found implementation of procedure uinput_request_done [2023-12-02 15:42:24,111 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 15:42:24,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 15:42:24,111 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-12-02 15:42:24,111 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-12-02 15:42:24,112 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-12-02 15:42:24,112 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-12-02 15:42:24,112 INFO L130 BoogieDeclarations]: Found specification of procedure input_abs_get_flat [2023-12-02 15:42:24,112 INFO L138 BoogieDeclarations]: Found implementation of procedure input_abs_get_flat [2023-12-02 15:42:24,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 15:42:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-12-02 15:42:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-12-02 15:42:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2023-12-02 15:42:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2023-12-02 15:42:24,113 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 15:42:24,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 15:42:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure input_alloc_absinfo [2023-12-02 15:42:24,114 INFO L138 BoogieDeclarations]: Found implementation of procedure input_alloc_absinfo [2023-12-02 15:42:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2023-12-02 15:42:24,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2023-12-02 15:42:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-12-02 15:42:24,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-12-02 15:42:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure uinput_request_find [2023-12-02 15:42:24,114 INFO L138 BoogieDeclarations]: Found implementation of procedure uinput_request_find [2023-12-02 15:42:24,114 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mutex_of_uinput_device [2023-12-02 15:42:24,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mutex_of_uinput_device [2023-12-02 15:42:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 15:42:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure uinput_allocate_device [2023-12-02 15:42:24,115 INFO L138 BoogieDeclarations]: Found implementation of procedure uinput_allocate_device [2023-12-02 15:42:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2023-12-02 15:42:24,115 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2023-12-02 15:42:24,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:42:24,116 INFO L130 BoogieDeclarations]: Found specification of procedure uinput_ioctl_handler [2023-12-02 15:42:24,116 INFO L138 BoogieDeclarations]: Found implementation of procedure uinput_ioctl_handler [2023-12-02 15:42:24,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 15:42:24,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 15:42:24,116 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-12-02 15:42:24,116 INFO L130 BoogieDeclarations]: Found specification of procedure uinput_ff_upload_from_user [2023-12-02 15:42:24,116 INFO L138 BoogieDeclarations]: Found implementation of procedure uinput_ff_upload_from_user [2023-12-02 15:42:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure uinput_destroy_device [2023-12-02 15:42:24,117 INFO L138 BoogieDeclarations]: Found implementation of procedure uinput_destroy_device [2023-12-02 15:42:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 15:42:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure input_abs_get_max [2023-12-02 15:42:24,117 INFO L138 BoogieDeclarations]: Found implementation of procedure input_abs_get_max [2023-12-02 15:42:24,117 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-12-02 15:42:24,118 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-12-02 15:42:24,118 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2023-12-02 15:42:24,118 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2023-12-02 15:42:24,118 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2023-12-02 15:42:24,118 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2023-12-02 15:42:24,118 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2023-12-02 15:42:24,118 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2023-12-02 15:42:24,118 INFO L130 BoogieDeclarations]: Found specification of procedure input_abs_get_min [2023-12-02 15:42:24,119 INFO L138 BoogieDeclarations]: Found implementation of procedure input_abs_get_min [2023-12-02 15:42:24,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:42:24,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 15:42:24,119 INFO L130 BoogieDeclarations]: Found specification of procedure is_compat_task [2023-12-02 15:42:24,119 INFO L138 BoogieDeclarations]: Found implementation of procedure is_compat_task [2023-12-02 15:42:24,119 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-12-02 15:42:24,119 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-12-02 15:42:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2023-12-02 15:42:24,120 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2023-12-02 15:42:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 15:42:24,120 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 15:42:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-12-02 15:42:24,120 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-12-02 15:42:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-12-02 15:42:24,120 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-12-02 15:42:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2023-12-02 15:42:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2023-12-02 15:42:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-12-02 15:42:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-12-02 15:42:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-12-02 15:42:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-12-02 15:42:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 15:42:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2023-12-02 15:42:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2023-12-02 15:42:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2023-12-02 15:42:24,122 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2023-12-02 15:42:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-12-02 15:42:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-12-02 15:42:24,122 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-12-02 15:42:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2023-12-02 15:42:24,122 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2023-12-02 15:42:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:42:24,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:42:24,122 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-12-02 15:42:24,123 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-12-02 15:42:24,536 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:42:24,539 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:42:30,852 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:42:31,366 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:42:31,366 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 15:42:31,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:42:31 BoogieIcfgContainer [2023-12-02 15:42:31,368 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:42:31,371 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:42:31,371 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:42:31,374 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:42:31,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:42:22" (1/3) ... [2023-12-02 15:42:31,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67dd3c5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:42:31, skipping insertion in model container [2023-12-02 15:42:31,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:42:23" (2/3) ... [2023-12-02 15:42:31,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67dd3c5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:42:31, skipping insertion in model container [2023-12-02 15:42:31,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:42:31" (3/3) ... [2023-12-02 15:42:31,377 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--input--misc--uinput.ko-ldv_main0.cil.out.i [2023-12-02 15:42:31,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:42:31,397 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 15:42:31,459 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:42:31,466 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;@4a2fe138, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:42:31,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 15:42:31,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 528 states, 343 states have (on average 1.3848396501457727) internal successors, (475), 355 states have internal predecessors, (475), 140 states have call successors, (140), 43 states have call predecessors, (140), 43 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-12-02 15:42:31,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 15:42:31,480 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:42:31,481 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:42:31,481 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:42:31,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:42:31,486 INFO L85 PathProgramCache]: Analyzing trace with hash 723327241, now seen corresponding path program 1 times [2023-12-02 15:42:31,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:42:31,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924661318] [2023-12-02 15:42:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:31,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:42:31,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:42:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:42:31,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:42:31,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924661318] [2023-12-02 15:42:31,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924661318] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:42:31,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:42:31,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:42:31,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312832389] [2023-12-02 15:42:31,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:42:31,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:42:31,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:42:31,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:42:31,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:42:31,817 INFO L87 Difference]: Start difference. First operand has 528 states, 343 states have (on average 1.3848396501457727) internal successors, (475), 355 states have internal predecessors, (475), 140 states have call successors, (140), 43 states have call predecessors, (140), 43 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:42:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:42:32,240 INFO L93 Difference]: Finished difference Result 1050 states and 1510 transitions. [2023-12-02 15:42:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:42:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-02 15:42:32,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:42:32,259 INFO L225 Difference]: With dead ends: 1050 [2023-12-02 15:42:32,259 INFO L226 Difference]: Without dead ends: 524 [2023-12-02 15:42:32,268 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 [2023-12-02 15:42:32,271 INFO L413 NwaCegarLoop]: 656 mSDtfsCounter, 742 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:42:32,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 656 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:42:32,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-12-02 15:42:32,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 524. [2023-12-02 15:42:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 342 states have (on average 1.3771929824561404) internal successors, (471), 351 states have internal predecessors, (471), 139 states have call successors, (139), 43 states have call predecessors, (139), 42 states have return successors, (135), 133 states have call predecessors, (135), 135 states have call successors, (135) [2023-12-02 15:42:32,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 745 transitions. [2023-12-02 15:42:32,359 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 745 transitions. Word has length 10 [2023-12-02 15:42:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:42:32,360 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 745 transitions. [2023-12-02 15:42:32,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:42:32,361 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 745 transitions. [2023-12-02 15:42:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 15:42:32,362 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:42:32,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:42:32,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 15:42:32,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:42:32,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:42:32,363 INFO L85 PathProgramCache]: Analyzing trace with hash 947988661, now seen corresponding path program 1 times [2023-12-02 15:42:32,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:42:32,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808008725] [2023-12-02 15:42:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:32,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:42:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:42:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:42:32,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:42:32,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808008725] [2023-12-02 15:42:32,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808008725] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:42:32,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:42:32,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:42:32,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517673137] [2023-12-02 15:42:32,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:42:32,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:42:32,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:42:32,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:42:32,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:42:32,465 INFO L87 Difference]: Start difference. First operand 524 states and 745 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:42:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:42:32,844 INFO L93 Difference]: Finished difference Result 526 states and 746 transitions. [2023-12-02 15:42:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:42:32,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-12-02 15:42:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:42:32,850 INFO L225 Difference]: With dead ends: 526 [2023-12-02 15:42:32,851 INFO L226 Difference]: Without dead ends: 523 [2023-12-02 15:42:32,851 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 [2023-12-02 15:42:32,853 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 737 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:42:32,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 653 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:42:32,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-12-02 15:42:32,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2023-12-02 15:42:32,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 342 states have (on average 1.3742690058479532) internal successors, (470), 350 states have internal predecessors, (470), 138 states have call successors, (138), 43 states have call predecessors, (138), 42 states have return successors, (135), 133 states have call predecessors, (135), 135 states have call successors, (135) [2023-12-02 15:42:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 743 transitions. [2023-12-02 15:42:32,893 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 743 transitions. Word has length 11 [2023-12-02 15:42:32,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:42:32,894 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 743 transitions. [2023-12-02 15:42:32,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:42:32,894 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 743 transitions. [2023-12-02 15:42:32,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 15:42:32,895 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:42:32,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:42:32,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 15:42:32,895 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:42:32,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:42:32,896 INFO L85 PathProgramCache]: Analyzing trace with hash -677437044, now seen corresponding path program 1 times [2023-12-02 15:42:32,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:42:32,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980114760] [2023-12-02 15:42:32,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:32,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:42:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:42:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:42:32,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:42:32,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980114760] [2023-12-02 15:42:32,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980114760] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:42:32,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:42:32,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:42:32,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575617938] [2023-12-02 15:42:32,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:42:32,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:42:32,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:42:32,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:42:32,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:42:32,955 INFO L87 Difference]: Start difference. First operand 523 states and 743 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:42:33,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:42:33,643 INFO L93 Difference]: Finished difference Result 665 states and 931 transitions. [2023-12-02 15:42:33,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:42:33,644 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-12-02 15:42:33,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:42:33,650 INFO L225 Difference]: With dead ends: 665 [2023-12-02 15:42:33,650 INFO L226 Difference]: Without dead ends: 655 [2023-12-02 15:42:33,651 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 [2023-12-02 15:42:33,652 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 230 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:42:33,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1258 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:42:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2023-12-02 15:42:33,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 655. [2023-12-02 15:42:33,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 422 states have (on average 1.3507109004739337) internal successors, (570), 433 states have internal predecessors, (570), 172 states have call successors, (172), 62 states have call predecessors, (172), 60 states have return successors, (173), 164 states have call predecessors, (173), 169 states have call successors, (173) [2023-12-02 15:42:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 915 transitions. [2023-12-02 15:42:33,732 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 915 transitions. Word has length 12 [2023-12-02 15:42:33,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:42:33,733 INFO L495 AbstractCegarLoop]: Abstraction has 655 states and 915 transitions. [2023-12-02 15:42:33,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:42:33,733 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 915 transitions. [2023-12-02 15:42:33,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 15:42:33,737 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:42:33,737 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:42:33,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 15:42:33,737 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:42:33,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:42:33,738 INFO L85 PathProgramCache]: Analyzing trace with hash -12721978, now seen corresponding path program 1 times [2023-12-02 15:42:33,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:42:33,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464367587] [2023-12-02 15:42:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:33,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:42:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:42:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:42:33,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:42:33,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464367587] [2023-12-02 15:42:33,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464367587] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:42:33,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:42:33,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:42:33,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504871426] [2023-12-02 15:42:33,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:42:33,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:42:33,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:42:33,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:42:33,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:42:33,868 INFO L87 Difference]: Start difference. First operand 655 states and 915 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 15:42:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:42:34,369 INFO L93 Difference]: Finished difference Result 1359 states and 1916 transitions. [2023-12-02 15:42:34,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:42:34,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-12-02 15:42:34,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:42:34,375 INFO L225 Difference]: With dead ends: 1359 [2023-12-02 15:42:34,375 INFO L226 Difference]: Without dead ends: 708 [2023-12-02 15:42:34,378 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 [2023-12-02 15:42:34,379 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 35 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1275 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:42:34,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1275 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 15:42:34,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2023-12-02 15:42:34,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 701. [2023-12-02 15:42:34,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 458 states have (on average 1.3558951965065502) internal successors, (621), 469 states have internal predecessors, (621), 182 states have call successors, (182), 62 states have call predecessors, (182), 60 states have return successors, (187), 174 states have call predecessors, (187), 179 states have call successors, (187) [2023-12-02 15:42:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 990 transitions. [2023-12-02 15:42:34,431 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 990 transitions. Word has length 35 [2023-12-02 15:42:34,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:42:34,432 INFO L495 AbstractCegarLoop]: Abstraction has 701 states and 990 transitions. [2023-12-02 15:42:34,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 15:42:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 990 transitions. [2023-12-02 15:42:34,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 15:42:34,436 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:42:34,436 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:42:34,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 15:42:34,436 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:42:34,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:42:34,437 INFO L85 PathProgramCache]: Analyzing trace with hash -55459870, now seen corresponding path program 1 times [2023-12-02 15:42:34,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:42:34,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412570099] [2023-12-02 15:42:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:34,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:42:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:42:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:42:34,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:42:34,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412570099] [2023-12-02 15:42:34,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412570099] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:42:34,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:42:34,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:42:34,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454623718] [2023-12-02 15:42:34,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:42:34,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:42:34,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:42:34,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:42:34,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:42:34,742 INFO L87 Difference]: Start difference. First operand 701 states and 990 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 15:42:35,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:42:35,719 INFO L93 Difference]: Finished difference Result 762 states and 1051 transitions. [2023-12-02 15:42:35,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:42:35,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2023-12-02 15:42:35,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:42:35,727 INFO L225 Difference]: With dead ends: 762 [2023-12-02 15:42:35,727 INFO L226 Difference]: Without dead ends: 759 [2023-12-02 15:42:35,728 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 [2023-12-02 15:42:35,729 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 1100 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1100 SdHoareTripleChecker+Valid, 1672 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:42:35,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1100 Valid, 1672 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 15:42:35,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2023-12-02 15:42:35,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 759. [2023-12-02 15:42:35,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 491 states have (on average 1.3421588594704685) internal successors, (659), 502 states have internal predecessors, (659), 192 states have call successors, (192), 78 states have call predecessors, (192), 75 states have return successors, (197), 184 states have call predecessors, (197), 189 states have call successors, (197) [2023-12-02 15:42:35,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1048 transitions. [2023-12-02 15:42:35,788 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1048 transitions. Word has length 44 [2023-12-02 15:42:35,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:42:35,788 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 1048 transitions. [2023-12-02 15:42:35,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 15:42:35,789 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1048 transitions. [2023-12-02 15:42:35,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 15:42:35,792 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:42:35,792 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 15:42:35,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 15:42:35,793 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:42:35,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:42:35,793 INFO L85 PathProgramCache]: Analyzing trace with hash -807706905, now seen corresponding path program 1 times [2023-12-02 15:42:35,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:42:35,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802147083] [2023-12-02 15:42:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:35,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:42:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:42:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 15:42:36,154 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:42:36,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802147083] [2023-12-02 15:42:36,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802147083] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:42:36,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:42:36,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:42:36,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847642165] [2023-12-02 15:42:36,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:42:36,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:42:36,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:42:36,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:42:36,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:42:36,156 INFO L87 Difference]: Start difference. First operand 759 states and 1048 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 15:42:38,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:42:38,437 INFO L93 Difference]: Finished difference Result 920 states and 1272 transitions. [2023-12-02 15:42:38,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:42:38,437 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2023-12-02 15:42:38,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:42:38,443 INFO L225 Difference]: With dead ends: 920 [2023-12-02 15:42:38,443 INFO L226 Difference]: Without dead ends: 910 [2023-12-02 15:42:38,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:42:38,444 INFO L413 NwaCegarLoop]: 463 mSDtfsCounter, 450 mSDsluCounter, 1428 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:42:38,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 1891 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 15:42:38,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2023-12-02 15:42:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 885. [2023-12-02 15:42:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 574 states have (on average 1.3414634146341464) internal successors, (770), 586 states have internal predecessors, (770), 221 states have call successors, (221), 92 states have call predecessors, (221), 89 states have return successors, (226), 213 states have call predecessors, (226), 218 states have call successors, (226) [2023-12-02 15:42:38,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1217 transitions. [2023-12-02 15:42:38,520 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1217 transitions. Word has length 47 [2023-12-02 15:42:38,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:42:38,520 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1217 transitions. [2023-12-02 15:42:38,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 15:42:38,520 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1217 transitions. [2023-12-02 15:42:38,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 15:42:38,524 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:42:38,524 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:42:38,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 15:42:38,524 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:42:38,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:42:38,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1015642699, now seen corresponding path program 1 times [2023-12-02 15:42:38,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:42:38,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052819636] [2023-12-02 15:42:38,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:38,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:42:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:42:38,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 15:42:38,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:42:38,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052819636] [2023-12-02 15:42:38,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052819636] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:42:38,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:42:38,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:42:38,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405853599] [2023-12-02 15:42:38,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:42:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:42:38,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:42:38,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:42:38,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:42:38,660 INFO L87 Difference]: Start difference. First operand 885 states and 1217 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 15:42:39,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:42:39,326 INFO L93 Difference]: Finished difference Result 1782 states and 2450 transitions. [2023-12-02 15:42:39,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:42:39,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 57 [2023-12-02 15:42:39,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:42:39,334 INFO L225 Difference]: With dead ends: 1782 [2023-12-02 15:42:39,334 INFO L226 Difference]: Without dead ends: 895 [2023-12-02 15:42:39,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:42:39,340 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 13 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1962 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:42:39,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1962 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:42:39,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2023-12-02 15:42:39,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 888. [2023-12-02 15:42:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 576 states have (on average 1.3368055555555556) internal successors, (770), 588 states have internal predecessors, (770), 222 states have call successors, (222), 92 states have call predecessors, (222), 89 states have return successors, (227), 214 states have call predecessors, (227), 219 states have call successors, (227) [2023-12-02 15:42:39,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1219 transitions. [2023-12-02 15:42:39,408 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1219 transitions. Word has length 57 [2023-12-02 15:42:39,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:42:39,409 INFO L495 AbstractCegarLoop]: Abstraction has 888 states and 1219 transitions. [2023-12-02 15:42:39,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 15:42:39,409 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1219 transitions. [2023-12-02 15:42:39,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-12-02 15:42:39,412 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:42:39,412 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 15:42:39,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 15:42:39,413 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:42:39,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:42:39,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2095603278, now seen corresponding path program 1 times [2023-12-02 15:42:39,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:42:39,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201350364] [2023-12-02 15:42:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:39,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:42:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:42:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 15:42:39,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:42:39,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201350364] [2023-12-02 15:42:39,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201350364] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:42:39,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:42:39,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:42:39,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548371618] [2023-12-02 15:42:39,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:42:39,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:42:39,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:42:39,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:42:39,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:42:39,750 INFO L87 Difference]: Start difference. First operand 888 states and 1219 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2023-12-02 15:42:40,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:42:40,437 INFO L93 Difference]: Finished difference Result 912 states and 1245 transitions. [2023-12-02 15:42:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:42:40,438 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 65 [2023-12-02 15:42:40,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:42:40,445 INFO L225 Difference]: With dead ends: 912 [2023-12-02 15:42:40,445 INFO L226 Difference]: Without dead ends: 909 [2023-12-02 15:42:40,446 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 [2023-12-02 15:42:40,446 INFO L413 NwaCegarLoop]: 665 mSDtfsCounter, 62 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 2537 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:42:40,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 2537 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 15:42:40,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2023-12-02 15:42:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 904. [2023-12-02 15:42:40,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 586 states have (on average 1.3344709897610922) internal successors, (782), 598 states have internal predecessors, (782), 225 states have call successors, (225), 95 states have call predecessors, (225), 92 states have return successors, (230), 217 states have call predecessors, (230), 222 states have call successors, (230) [2023-12-02 15:42:40,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1237 transitions. [2023-12-02 15:42:40,508 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1237 transitions. Word has length 65 [2023-12-02 15:42:40,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:42:40,509 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1237 transitions. [2023-12-02 15:42:40,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2023-12-02 15:42:40,509 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1237 transitions. [2023-12-02 15:42:40,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-12-02 15:42:40,512 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:42:40,512 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 15:42:40,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 15:42:40,513 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:42:40,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:42:40,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1895160954, now seen corresponding path program 1 times [2023-12-02 15:42:40,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:42:40,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681893047] [2023-12-02 15:42:40,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:40,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:42:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:42:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 15:42:40,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:42:40,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681893047] [2023-12-02 15:42:40,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681893047] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:42:40,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944510945] [2023-12-02 15:42:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:42:40,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:42:40,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:42:40,660 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:42:40,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:42:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:42:41,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:42:41,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:42:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:42:41,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:42:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 15:42:41,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944510945] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:42:41,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1359555359] [2023-12-02 15:42:41,329 INFO L159 IcfgInterpreter]: Started Sifa with 59 locations of interest [2023-12-02 15:42:41,329 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:42:41,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:42:41,338 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:42:41,339 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:42:59,522 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_check_return_value with input of size 114 for LOIs [2023-12-02 15:42:59,535 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_handler_precall with input of size 23 for LOIs [2023-12-02 15:42:59,538 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_mutex_lock_interruptible_mutex_of_uinput_device with input of size 49 for LOIs [2023-12-02 15:42:59,557 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock_interruptible with input of size 47 for LOIs [2023-12-02 15:42:59,562 INFO L197 IcfgInterpreter]: Interpreting procedure kzalloc with input of size 75 for LOIs [2023-12-02 15:42:59,980 INFO L197 IcfgInterpreter]: Interpreting procedure __init_waitqueue_head with input of size 101 for LOIs [2023-12-02 15:43:00,029 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 81 for LOIs [2023-12-02 15:43:00,084 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_mutex_unlock_mutex_of_uinput_device with input of size 132 for LOIs [2023-12-02 15:43:00,232 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:43:10,784 WARN L293 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 510 DAG size of output: 506 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:43:17,185 WARN L293 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 516 DAG size of output: 512 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:43:34,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1359555359] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:43:34,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:43:34,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [4, 4, 4] total 52 [2023-12-02 15:43:34,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239724867] [2023-12-02 15:43:34,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:43:34,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-02 15:43:34,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:43:34,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-02 15:43:34,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2401, Unknown=2, NotChecked=0, Total=2652 [2023-12-02 15:43:34,767 INFO L87 Difference]: Start difference. First operand 904 states and 1237 transitions. Second operand has 49 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 12 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 15:43:41,998 WARN L293 SmtUtils]: Spent 6.46s on a formula simplification. DAG size of input: 511 DAG size of output: 396 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:44:10,424 WARN L293 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 573 DAG size of output: 467 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:44:51,460 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:44:53,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:44:55,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:44:57,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:44:59,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:01,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:03,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:45:05,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:07,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:09,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:11,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:13,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:15,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:17,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:19,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:21,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:23,590 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:25,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:27,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:29,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:31,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:33,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:35,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:37,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:39,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:45:41,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:43,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:45,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:47,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:49,767 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:51,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:53,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:55,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:57,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:45:59,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:46:01,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:46:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:46:04,034 INFO L93 Difference]: Finished difference Result 1349 states and 1837 transitions. [2023-12-02 15:46:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-12-02 15:46:04,035 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 12 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 67 [2023-12-02 15:46:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:46:04,044 INFO L225 Difference]: With dead ends: 1349 [2023-12-02 15:46:04,044 INFO L226 Difference]: Without dead ends: 1297 [2023-12-02 15:46:04,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 151 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 69.7s TimeCoverageRelationStatistics Valid=439, Invalid=3849, Unknown=2, NotChecked=0, Total=4290 [2023-12-02 15:46:04,048 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 297 mSDsluCounter, 11040 mSDsCounter, 0 mSdLazyCounter, 9891 mSolverCounterSat, 135 mSolverCounterUnsat, 39 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 11665 SdHoareTripleChecker+Invalid, 10065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 9891 IncrementalHoareTripleChecker+Invalid, 39 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 113.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:46:04,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 11665 Invalid, 10065 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [135 Valid, 9891 Invalid, 39 Unknown, 0 Unchecked, 113.5s Time] [2023-12-02 15:46:04,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2023-12-02 15:46:04,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1198. [2023-12-02 15:46:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 773 states have (on average 1.3272962483829236) internal successors, (1026), 796 states have internal predecessors, (1026), 297 states have call successors, (297), 131 states have call predecessors, (297), 127 states have return successors, (310), 279 states have call predecessors, (310), 294 states have call successors, (310) [2023-12-02 15:46:04,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 1633 transitions. [2023-12-02 15:46:04,205 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 1633 transitions. Word has length 67 [2023-12-02 15:46:04,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:46:04,206 INFO L495 AbstractCegarLoop]: Abstraction has 1198 states and 1633 transitions. [2023-12-02 15:46:04,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 37 states have internal predecessors, (40), 12 states have call successors, (12), 9 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 15:46:04,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 1633 transitions. [2023-12-02 15:46:04,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-02 15:46:04,211 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:46:04,211 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-12-02 15:46:04,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:46:04,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:46:04,424 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:46:04,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:46:04,424 INFO L85 PathProgramCache]: Analyzing trace with hash 12368030, now seen corresponding path program 1 times [2023-12-02 15:46:04,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:46:04,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169126553] [2023-12-02 15:46:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:46:04,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:46:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:46:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 15:46:04,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:46:04,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169126553] [2023-12-02 15:46:04,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169126553] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:46:04,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:46:04,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 15:46:04,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228486200] [2023-12-02 15:46:04,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:46:04,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 15:46:04,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:46:04,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 15:46:04,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:46:04,797 INFO L87 Difference]: Start difference. First operand 1198 states and 1633 transitions. Second operand has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 15:46:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:46:08,450 INFO L93 Difference]: Finished difference Result 1575 states and 2239 transitions. [2023-12-02 15:46:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:46:08,451 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 73 [2023-12-02 15:46:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:46:08,465 INFO L225 Difference]: With dead ends: 1575 [2023-12-02 15:46:08,465 INFO L226 Difference]: Without dead ends: 1564 [2023-12-02 15:46:08,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:46:08,467 INFO L413 NwaCegarLoop]: 505 mSDtfsCounter, 547 mSDsluCounter, 2423 mSDsCounter, 0 mSdLazyCounter, 2120 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 2928 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 2120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:46:08,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 2928 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 2120 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-12-02 15:46:08,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1564 states. [2023-12-02 15:46:08,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1564 to 1226. [2023-12-02 15:46:08,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 788 states have (on average 1.3223350253807107) internal successors, (1042), 813 states have internal predecessors, (1042), 308 states have call successors, (308), 135 states have call predecessors, (308), 129 states have return successors, (325), 286 states have call predecessors, (325), 305 states have call successors, (325) [2023-12-02 15:46:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1675 transitions. [2023-12-02 15:46:08,643 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1675 transitions. Word has length 73 [2023-12-02 15:46:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:46:08,644 INFO L495 AbstractCegarLoop]: Abstraction has 1226 states and 1675 transitions. [2023-12-02 15:46:08,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 4 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 15:46:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1675 transitions. [2023-12-02 15:46:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 15:46:08,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:46:08,649 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 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] [2023-12-02 15:46:08,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 15:46:08,650 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:46:08,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:46:08,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1083468571, now seen corresponding path program 1 times [2023-12-02 15:46:08,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:46:08,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271842296] [2023-12-02 15:46:08,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:46:08,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:46:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:46:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 15:46:08,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:46:08,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271842296] [2023-12-02 15:46:08,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271842296] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:46:08,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:46:08,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:46:08,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952377367] [2023-12-02 15:46:08,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:46:08,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:46:08,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:46:08,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:46:08,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:46:08,781 INFO L87 Difference]: Start difference. First operand 1226 states and 1675 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 15:46:09,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:46:09,493 INFO L93 Difference]: Finished difference Result 2573 states and 3563 transitions. [2023-12-02 15:46:09,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:46:09,494 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 75 [2023-12-02 15:46:09,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:46:09,506 INFO L225 Difference]: With dead ends: 2573 [2023-12-02 15:46:09,506 INFO L226 Difference]: Without dead ends: 1351 [2023-12-02 15:46:09,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:46:09,515 INFO L413 NwaCegarLoop]: 682 mSDtfsCounter, 262 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1210 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:46:09,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 1210 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:46:09,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2023-12-02 15:46:09,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1337. [2023-12-02 15:46:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 874 states have (on average 1.3421052631578947) internal successors, (1173), 903 states have internal predecessors, (1173), 333 states have call successors, (333), 135 states have call predecessors, (333), 129 states have return successors, (360), 307 states have call predecessors, (360), 330 states have call successors, (360) [2023-12-02 15:46:09,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1866 transitions. [2023-12-02 15:46:09,690 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1866 transitions. Word has length 75 [2023-12-02 15:46:09,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:46:09,691 INFO L495 AbstractCegarLoop]: Abstraction has 1337 states and 1866 transitions. [2023-12-02 15:46:09,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-02 15:46:09,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1866 transitions. [2023-12-02 15:46:09,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-02 15:46:09,697 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:46:09,697 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-12-02 15:46:09,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 15:46:09,698 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:46:09,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:46:09,698 INFO L85 PathProgramCache]: Analyzing trace with hash -448645239, now seen corresponding path program 1 times [2023-12-02 15:46:09,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:46:09,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111918153] [2023-12-02 15:46:09,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:46:09,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:46:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:46:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 15:46:09,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:46:09,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111918153] [2023-12-02 15:46:09,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111918153] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:46:09,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733054096] [2023-12-02 15:46:09,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:46:09,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:46:09,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:46:09,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:46:09,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:46:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:46:10,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:46:10,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:46:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:46:10,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:46:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 15:46:10,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733054096] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:46:10,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1248048815] [2023-12-02 15:46:10,497 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2023-12-02 15:46:10,498 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:46:10,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:46:10,498 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:46:10,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:46:26,501 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_check_return_value with input of size 114 for LOIs [2023-12-02 15:46:26,514 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_handler_precall with input of size 23 for LOIs [2023-12-02 15:46:26,516 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_mutex_lock_interruptible_mutex_of_uinput_device with input of size 49 for LOIs [2023-12-02 15:46:26,534 INFO L197 IcfgInterpreter]: Interpreting procedure input_event_size with input of size 144 for LOIs [2023-12-02 15:46:27,365 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock_interruptible with input of size 47 for LOIs [2023-12-02 15:46:27,370 INFO L197 IcfgInterpreter]: Interpreting procedure kzalloc with input of size 75 for LOIs [2023-12-02 15:46:27,775 INFO L197 IcfgInterpreter]: Interpreting procedure __init_waitqueue_head with input of size 101 for LOIs [2023-12-02 15:46:27,818 INFO L197 IcfgInterpreter]: Interpreting procedure is_compat_task with input of size 144 for LOIs [2023-12-02 15:46:28,137 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 81 for LOIs [2023-12-02 15:46:28,173 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:46:39,281 WARN L293 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 510 DAG size of output: 506 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:46:46,230 WARN L293 SmtUtils]: Spent 6.81s on a formula simplification. DAG size of input: 516 DAG size of output: 512 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:47:11,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1248048815] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:47:11,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:47:11,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [4, 4, 4] total 53 [2023-12-02 15:47:11,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031782586] [2023-12-02 15:47:11,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:47:11,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-02 15:47:11,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:47:11,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-02 15:47:11,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=2497, Unknown=3, NotChecked=0, Total=2756 [2023-12-02 15:47:11,735 INFO L87 Difference]: Start difference. First operand 1337 states and 1866 transitions. Second operand has 50 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:47:46,670 WARN L293 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 573 DAG size of output: 467 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:48:18,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:20,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:22,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:25,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:27,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:29,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:31,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:33,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:35,041 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:37,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:39,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:41,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:43,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:45,098 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:47,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:49,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:51,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:53,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:55,141 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:57,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:48:59,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:49:01,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:49:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:49:02,171 INFO L93 Difference]: Finished difference Result 2774 states and 3867 transitions. [2023-12-02 15:49:02,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-02 15:49:02,172 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 79 [2023-12-02 15:49:02,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:49:02,181 INFO L225 Difference]: With dead ends: 2774 [2023-12-02 15:49:02,181 INFO L226 Difference]: Without dead ends: 1783 [2023-12-02 15:49:02,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 77.8s TimeCoverageRelationStatistics Valid=422, Invalid=3735, Unknown=3, NotChecked=0, Total=4160 [2023-12-02 15:49:02,187 INFO L413 NwaCegarLoop]: 630 mSDtfsCounter, 268 mSDsluCounter, 5011 mSDsCounter, 0 mSdLazyCounter, 6225 mSolverCounterSat, 97 mSolverCounterUnsat, 26 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 5641 SdHoareTripleChecker+Invalid, 6348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 6225 IncrementalHoareTripleChecker+Invalid, 26 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:49:02,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 5641 Invalid, 6348 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [97 Valid, 6225 Invalid, 26 Unknown, 0 Unchecked, 75.8s Time] [2023-12-02 15:49:02,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2023-12-02 15:49:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1656. [2023-12-02 15:49:02,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1086 states have (on average 1.347145488029466) internal successors, (1463), 1130 states have internal predecessors, (1463), 404 states have call successors, (404), 170 states have call predecessors, (404), 165 states have return successors, (432), 366 states have call predecessors, (432), 401 states have call successors, (432) [2023-12-02 15:49:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2299 transitions. [2023-12-02 15:49:02,357 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2299 transitions. Word has length 79 [2023-12-02 15:49:02,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:49:02,357 INFO L495 AbstractCegarLoop]: Abstraction has 1656 states and 2299 transitions. [2023-12-02 15:49:02,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 13 states have call successors, (14), 9 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:49:02,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2299 transitions. [2023-12-02 15:49:02,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-12-02 15:49:02,362 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:49:02,362 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 15:49:02,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 15:49:02,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 15:49:02,563 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:49:02,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:49:02,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1377860405, now seen corresponding path program 1 times [2023-12-02 15:49:02,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:49:02,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649235264] [2023-12-02 15:49:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:02,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:49:02,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 15:49:02,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:49:02,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649235264] [2023-12-02 15:49:02,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649235264] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:49:02,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960365879] [2023-12-02 15:49:02,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:02,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:49:02,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:49:02,709 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:49:02,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:49:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:03,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:49:03,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:49:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:49:03,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:49:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 15:49:03,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960365879] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:49:03,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [931886449] [2023-12-02 15:49:03,271 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2023-12-02 15:49:03,271 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:49:03,271 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:49:03,271 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:49:03,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:49:21,817 INFO L197 IcfgInterpreter]: Interpreting procedure uinput_allocate_device with input of size 146 for LOIs [2023-12-02 15:49:22,508 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_check_return_value with input of size 114 for LOIs [2023-12-02 15:49:22,520 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_handler_precall with input of size 23 for LOIs [2023-12-02 15:49:22,522 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_mutex_lock_interruptible_mutex_of_uinput_device with input of size 49 for LOIs [2023-12-02 15:49:22,540 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock_interruptible with input of size 47 for LOIs [2023-12-02 15:49:22,545 INFO L197 IcfgInterpreter]: Interpreting procedure kzalloc with input of size 194 for LOIs [2023-12-02 15:49:23,771 INFO L197 IcfgInterpreter]: Interpreting procedure __init_waitqueue_head with input of size 101 for LOIs [2023-12-02 15:49:23,828 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 217 for LOIs [2023-12-02 15:49:24,011 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_mutex_unlock_mutex_of_uinput_device with input of size 200 for LOIs [2023-12-02 15:49:24,490 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:49:35,407 WARN L293 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 510 DAG size of output: 506 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:49:42,126 WARN L293 SmtUtils]: Spent 6.59s on a formula simplification. DAG size of input: 516 DAG size of output: 512 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:50:25,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [931886449] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:50:25,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:50:25,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [4, 4, 4] total 60 [2023-12-02 15:50:25,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358173883] [2023-12-02 15:50:25,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:50:25,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-12-02 15:50:25,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:50:25,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-12-02 15:50:25,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=3266, Unknown=12, NotChecked=0, Total=3540 [2023-12-02 15:50:25,579 INFO L87 Difference]: Start difference. First operand 1656 states and 2299 transitions. Second operand has 57 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 14 states have call successors, (14), 10 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:50:37,987 WARN L293 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 517 DAG size of output: 402 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:51:05,607 WARN L293 SmtUtils]: Spent 5.50s on a formula simplification. DAG size of input: 573 DAG size of output: 467 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:52:27,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:29,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:52:31,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:52:33,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:52:35,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:52:37,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:52:39,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:52:41,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:43,386 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:45,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:52:47,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:52:49,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:52:51,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:53,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:52:55,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:52:57,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:52:59,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:01,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:03,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:53:05,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:07,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:09,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:11,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:13,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:15,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:17,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:19,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:21,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:23,545 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:25,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:27,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:53:29,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:31,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:33,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:35,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:37,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:39,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:41,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:53:43,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:53:45,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:47,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:49,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:51,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:53:53,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:55,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:57,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:53:59,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:54:01,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:54:03,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:05,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:54:07,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:54:09,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:54:11,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:54:13,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:54:15,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:54:17,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:54:19,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:54:21,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:54:23,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:54:26,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:54:32,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:54:32,292 INFO L93 Difference]: Finished difference Result 2246 states and 3108 transitions. [2023-12-02 15:54:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-12-02 15:54:32,293 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 14 states have call successors, (14), 10 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 81 [2023-12-02 15:54:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:54:32,307 INFO L225 Difference]: With dead ends: 2246 [2023-12-02 15:54:32,308 INFO L226 Difference]: Without dead ends: 2194 [2023-12-02 15:54:32,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 106.5s TimeCoverageRelationStatistics Valid=488, Invalid=6122, Unknown=32, NotChecked=0, Total=6642 [2023-12-02 15:54:32,312 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 281 mSDsluCounter, 15109 mSDsCounter, 0 mSdLazyCounter, 14310 mSolverCounterSat, 131 mSolverCounterUnsat, 150 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 197.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 15747 SdHoareTripleChecker+Invalid, 14591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 14310 IncrementalHoareTripleChecker+Invalid, 150 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 200.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:54:32,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 15747 Invalid, 14591 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [131 Valid, 14310 Invalid, 150 Unknown, 0 Unchecked, 200.5s Time] [2023-12-02 15:54:32,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2023-12-02 15:54:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 1977. [2023-12-02 15:54:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1977 states, 1299 states have (on average 1.3502694380292533) internal successors, (1754), 1357 states have internal predecessors, (1754), 475 states have call successors, (475), 207 states have call predecessors, (475), 202 states have return successors, (503), 425 states have call predecessors, (503), 472 states have call successors, (503) [2023-12-02 15:54:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1977 states to 1977 states and 2732 transitions. [2023-12-02 15:54:32,636 INFO L78 Accepts]: Start accepts. Automaton has 1977 states and 2732 transitions. Word has length 81 [2023-12-02 15:54:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:54:32,637 INFO L495 AbstractCegarLoop]: Abstraction has 1977 states and 2732 transitions. [2023-12-02 15:54:32,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 42 states have internal predecessors, (45), 14 states have call successors, (14), 10 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-02 15:54:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1977 states and 2732 transitions. [2023-12-02 15:54:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 15:54:32,644 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:54:32,644 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:54:32,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 15:54:32,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 15:54:32,845 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:54:32,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:54:32,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1449612056, now seen corresponding path program 1 times [2023-12-02 15:54:32,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:54:32,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868542743] [2023-12-02 15:54:32,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:54:32,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:54:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:54:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 15:54:33,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:54:33,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868542743] [2023-12-02 15:54:33,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868542743] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:54:33,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441981096] [2023-12-02 15:54:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:54:33,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:54:33,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:54:33,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:54:33,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:54:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:54:33,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 15:54:33,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:54:33,950 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 15:54:33,950 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:54:33,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441981096] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:54:33,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:54:33,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2023-12-02 15:54:33,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131171813] [2023-12-02 15:54:33,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:54:33,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:54:33,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:54:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:54:33,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:54:33,953 INFO L87 Difference]: Start difference. First operand 1977 states and 2732 transitions. Second operand has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-12-02 15:54:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:54:35,583 INFO L93 Difference]: Finished difference Result 2184 states and 3023 transitions. [2023-12-02 15:54:35,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:54:35,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) Word has length 83 [2023-12-02 15:54:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:54:35,594 INFO L225 Difference]: With dead ends: 2184 [2023-12-02 15:54:35,594 INFO L226 Difference]: Without dead ends: 2171 [2023-12-02 15:54:35,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:54:35,595 INFO L413 NwaCegarLoop]: 683 mSDtfsCounter, 225 mSDsluCounter, 2305 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 2988 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:54:35,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 2988 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 15:54:35,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2023-12-02 15:54:35,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2096. [2023-12-02 15:54:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2096 states, 1381 states have (on average 1.3548153511947865) internal successors, (1871), 1444 states have internal predecessors, (1871), 500 states have call successors, (500), 217 states have call predecessors, (500), 214 states have return successors, (528), 448 states have call predecessors, (528), 497 states have call successors, (528) [2023-12-02 15:54:35,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2096 states to 2096 states and 2899 transitions. [2023-12-02 15:54:35,835 INFO L78 Accepts]: Start accepts. Automaton has 2096 states and 2899 transitions. Word has length 83 [2023-12-02 15:54:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:54:35,835 INFO L495 AbstractCegarLoop]: Abstraction has 2096 states and 2899 transitions. [2023-12-02 15:54:35,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 2 states have call successors, (13) [2023-12-02 15:54:35,836 INFO L276 IsEmpty]: Start isEmpty. Operand 2096 states and 2899 transitions. [2023-12-02 15:54:35,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 15:54:35,840 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:54:35,840 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:54:35,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 15:54:36,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:54:36,041 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:54:36,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:54:36,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1819621355, now seen corresponding path program 1 times [2023-12-02 15:54:36,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:54:36,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056304193] [2023-12-02 15:54:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:54:36,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:54:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:54:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 15:54:36,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:54:36,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056304193] [2023-12-02 15:54:36,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056304193] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:54:36,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876818286] [2023-12-02 15:54:36,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:54:36,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:54:36,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:54:36,157 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:54:36,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3a2b5e02-5b89-49bb-9d5f-6b243593c1c4/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 15:54:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:54:36,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:54:36,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:54:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 15:54:36,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:54:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 15:54:36,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876818286] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:54:36,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1581499532] [2023-12-02 15:54:36,777 INFO L159 IcfgInterpreter]: Started Sifa with 75 locations of interest [2023-12-02 15:54:36,777 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:54:36,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:54:36,778 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:54:36,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 15:54:55,448 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_check_return_value with input of size 114 for LOIs [2023-12-02 15:54:55,460 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_mutex_lock_interruptible_mutex_of_uinput_device with input of size 49 for LOIs [2023-12-02 15:54:55,478 INFO L197 IcfgInterpreter]: Interpreting procedure input_event_size with input of size 144 for LOIs [2023-12-02 15:54:56,649 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock_interruptible with input of size 47 for LOIs [2023-12-02 15:54:56,654 INFO L197 IcfgInterpreter]: Interpreting procedure kzalloc with input of size 75 for LOIs [2023-12-02 15:54:57,061 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_malloc with input of size 81 for LOIs [2023-12-02 15:54:57,098 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_mutex_unlock_mutex_of_uinput_device with input of size 199 for LOIs [2023-12-02 15:54:57,828 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_handler_precall with input of size 23 for LOIs [2023-12-02 15:54:57,830 INFO L197 IcfgInterpreter]: Interpreting procedure __init_waitqueue_head with input of size 101 for LOIs [2023-12-02 15:54:57,874 INFO L197 IcfgInterpreter]: Interpreting procedure is_compat_task with input of size 144 for LOIs [2023-12-02 15:54:59,250 INFO L197 IcfgInterpreter]: Interpreting procedure get_current with input of size 198 for LOIs [2023-12-02 15:54:59,349 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 15:55:10,256 WARN L293 SmtUtils]: Spent 6.45s on a formula simplification. DAG size of input: 510 DAG size of output: 506 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:55:17,256 WARN L293 SmtUtils]: Spent 6.85s on a formula simplification. DAG size of input: 516 DAG size of output: 512 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:56:30,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1581499532] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:56:30,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 15:56:30,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [4, 4, 4] total 65 [2023-12-02 15:56:30,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484258662] [2023-12-02 15:56:30,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:56:30,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-02 15:56:30,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:56:30,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-02 15:56:30,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=3849, Unknown=14, NotChecked=0, Total=4160 [2023-12-02 15:56:30,227 INFO L87 Difference]: Start difference. First operand 2096 states and 2899 transitions. Second operand has 62 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 15 states have call successors, (15), 11 states have call predecessors, (15), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13)