./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.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_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/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_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/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_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/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 ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 17:29:16,243 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 17:29:16,307 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 17:29:16,312 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 17:29:16,312 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 17:29:16,337 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 17:29:16,337 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 17:29:16,338 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 17:29:16,338 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 17:29:16,339 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 17:29:16,339 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 17:29:16,340 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 17:29:16,341 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 17:29:16,341 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 17:29:16,342 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 17:29:16,342 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 17:29:16,343 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 17:29:16,343 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 17:29:16,344 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 17:29:16,344 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 17:29:16,345 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 17:29:16,345 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 17:29:16,346 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 17:29:16,347 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 17:29:16,347 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 17:29:16,347 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 17:29:16,348 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 17:29:16,348 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 17:29:16,349 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 17:29:16,349 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 17:29:16,349 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 17:29:16,350 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 17:29:16,350 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 17:29:16,350 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 17:29:16,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:29:16,351 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 17:29:16,351 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 17:29:16,351 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 17:29:16,352 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 17:29:16,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 17:29:16,352 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 17:29:16,352 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 17:29:16,352 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 17:29:16,353 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 17:29:16,353 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_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac653d5d4bd645822c87d49861fb2a5e304e57a9bdc7e425845f1dc10a0731d2 [2023-12-02 17:29:16,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 17:29:16,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 17:29:16,588 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 17:29:16,589 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 17:29:16,590 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 17:29:16,591 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2023-12-02 17:29:21,467 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 17:29:21,921 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 17:29:21,921 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2023-12-02 17:29:21,960 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/bin/utaipan-verify-nQ1chXbOIh/data/d191ede30/94ec44d4b95444fabb0ad3dddcaa5497/FLAG2ddfcacb7 [2023-12-02 17:29:21,976 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/bin/utaipan-verify-nQ1chXbOIh/data/d191ede30/94ec44d4b95444fabb0ad3dddcaa5497 [2023-12-02 17:29:21,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 17:29:21,980 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 17:29:21,981 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 17:29:21,981 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 17:29:21,986 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 17:29:21,987 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:29:21" (1/1) ... [2023-12-02 17:29:21,988 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7451c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:21, skipping insertion in model container [2023-12-02 17:29:21,988 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 05:29:21" (1/1) ... [2023-12-02 17:29:22,136 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 17:29:23,804 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_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2023-12-02 17:29:23,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:29:23,933 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 17:29:24,027 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"); [3515] [2023-12-02 17:29:24,031 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; subl %2,%0; sete %1": "+m" (v->counter), "=qm" (c): "ir" (i): "memory"); [3563-3564] [2023-12-02 17:29:24,031 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; xaddb %b0, %1\n": "+q" (__ret), "+m" (v->counter): : "memory", "cc"); [3575-3576] [2023-12-02 17:29:24,032 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; xaddw %w0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [3579-3580] [2023-12-02 17:29:24,032 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; xaddl %0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [3583-3584] [2023-12-02 17:29:24,032 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; xaddq %q0, %1\n": "+r" (__ret), "+m" (v->counter): : "memory", "cc"); [3587-3588] [2023-12-02 17:29:24,239 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [6907] [2023-12-02 17:29:24,240 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("": : : "memory"); [6914] [2023-12-02 17:29:24,241 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %2,%1\n\tsbb %0,%0": "=r" (oldbit), "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [6923-6924] [2023-12-02 17:29:24,241 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %2,%1\n\tsbb %0,%0": "=r" (oldbit), "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [6940-6941] [2023-12-02 17:29:24,242 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)); [6955-6956] [2023-12-02 17:29:24,243 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [6969] [2023-12-02 17:29:24,244 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [6972] [2023-12-02 17:29:24,244 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [6975] [2023-12-02 17:29:24,244 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [6978] [2023-12-02 17:29:24,245 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& kernel_stack)); [7000] [2023-12-02 17:29:24,245 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& kernel_stack)); [7003] [2023-12-02 17:29:24,246 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& kernel_stack)); [7006] [2023-12-02 17:29:24,246 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& kernel_stack)); [7009] [2023-12-02 17:29:24,294 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_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i[258672,258685] [2023-12-02 17:29:24,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 17:29:24,415 WARN L675 CHandler]: The function __xadd_wrong_size is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:29:24,415 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:29:24,415 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 17:29:24,421 INFO L206 MainTranslator]: Completed translation [2023-12-02 17:29:24,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:24 WrapperNode [2023-12-02 17:29:24,422 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 17:29:24,423 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 17:29:24,423 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 17:29:24,423 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 17:29:24,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:24" (1/1) ... [2023-12-02 17:29:24,504 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:24" (1/1) ... [2023-12-02 17:29:24,643 INFO L138 Inliner]: procedures = 373, calls = 3058, calls flagged for inlining = 174, calls inlined = 166, statements flattened = 6243 [2023-12-02 17:29:24,644 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 17:29:24,645 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 17:29:24,645 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 17:29:24,645 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 17:29:24,653 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:24" (1/1) ... [2023-12-02 17:29:24,653 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:24" (1/1) ... [2023-12-02 17:29:24,675 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:24" (1/1) ... [2023-12-02 17:29:24,675 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:24" (1/1) ... [2023-12-02 17:29:24,852 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:24" (1/1) ... [2023-12-02 17:29:24,876 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:24" (1/1) ... [2023-12-02 17:29:24,902 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:24" (1/1) ... [2023-12-02 17:29:24,918 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:24" (1/1) ... [2023-12-02 17:29:24,950 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 17:29:24,951 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 17:29:24,951 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 17:29:24,952 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 17:29:24,952 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:24" (1/1) ... [2023-12-02 17:29:24,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 17:29:24,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:29:24,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 17:29:24,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 17:29:25,021 INFO L130 BoogieDeclarations]: Found specification of procedure serial_break [2023-12-02 17:29:25,022 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_break [2023-12-02 17:29:25,022 INFO L130 BoogieDeclarations]: Found specification of procedure serial_proc_open [2023-12-02 17:29:25,022 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_proc_open [2023-12-02 17:29:25,022 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_throttle [2023-12-02 17:29:25,023 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_throttle [2023-12-02 17:29:25,023 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write_start [2023-12-02 17:29:25,023 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write_start [2023-12-02 17:29:25,023 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2023-12-02 17:29:25,023 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2023-12-02 17:29:25,024 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-12-02 17:29:25,024 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-12-02 17:29:25,024 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2023-12-02 17:29:25,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2023-12-02 17:29:25,024 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2023-12-02 17:29:25,025 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2023-12-02 17:29:25,025 INFO L130 BoogieDeclarations]: Found specification of procedure usb_translate_errors [2023-12-02 17:29:25,025 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_translate_errors [2023-12-02 17:29:25,025 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2023-12-02 17:29:25,025 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2023-12-02 17:29:25,026 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_dtr_rts [2023-12-02 17:29:25,026 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_dtr_rts [2023-12-02 17:29:25,026 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_remove [2023-12-02 17:29:25,026 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_remove [2023-12-02 17:29:25,026 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_write [2023-12-02 17:29:25,026 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_write [2023-12-02 17:29:25,026 INFO L130 BoogieDeclarations]: Found specification of procedure serial_chars_in_buffer [2023-12-02 17:29:25,026 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_chars_in_buffer [2023-12-02 17:29:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 17:29:25,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 17:29:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2023-12-02 17:29:25,027 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2023-12-02 17:29:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_activate [2023-12-02 17:29:25,027 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_activate [2023-12-02 17:29:25,027 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit_unlock [2023-12-02 17:29:25,027 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit_unlock [2023-12-02 17:29:25,028 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_get_interface [2023-12-02 17:29:25,028 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_get_interface [2023-12-02 17:29:25,028 INFO L130 BoogieDeclarations]: Found specification of procedure seq_printf [2023-12-02 17:29:25,028 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_printf [2023-12-02 17:29:25,028 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-12-02 17:29:25,029 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-12-02 17:29:25,029 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2023-12-02 17:29:25,029 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2023-12-02 17:29:25,029 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 17:29:25,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 17:29:25,030 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_suspend [2023-12-02 17:29:25,030 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_suspend [2023-12-02 17:29:25,030 INFO L130 BoogieDeclarations]: Found specification of procedure usb_store_new_id [2023-12-02 17:29:25,030 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_store_new_id [2023-12-02 17:29:25,030 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2023-12-02 17:29:25,030 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2023-12-02 17:29:25,030 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_is_int_in [2023-12-02 17:29:25,031 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_is_int_in [2023-12-02 17:29:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2023-12-02 17:29:25,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2023-12-02 17:29:25,031 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2023-12-02 17:29:25,031 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2023-12-02 17:29:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_get_by_index [2023-12-02 17:29:25,032 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_get_by_index [2023-12-02 17:29:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_port_poison_urbs [2023-12-02 17:29:25,032 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_port_poison_urbs [2023-12-02 17:29:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure serial_hangup [2023-12-02 17:29:25,032 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_hangup [2023-12-02 17:29:25,032 INFO L130 BoogieDeclarations]: Found specification of procedure serial_ioctl [2023-12-02 17:29:25,033 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_ioctl [2023-12-02 17:29:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write_room [2023-12-02 17:29:25,033 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write_room [2023-12-02 17:29:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_disc_mutex_of_usb_serial [2023-12-02 17:29:25,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_disc_mutex_of_usb_serial [2023-12-02 17:29:25,033 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-12-02 17:29:25,033 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-12-02 17:29:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_debug_data [2023-12-02 17:29:25,034 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_debug_data [2023-12-02 17:29:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2023-12-02 17:29:25,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2023-12-02 17:29:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-12-02 17:29:25,034 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-12-02 17:29:25,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 17:29:25,035 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-12-02 17:29:25,035 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-12-02 17:29:25,035 INFO L130 BoogieDeclarations]: Found specification of procedure serial_unthrottle [2023-12-02 17:29:25,035 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_unthrottle [2023-12-02 17:29:25,035 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unpoison_urb [2023-12-02 17:29:25,035 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unpoison_urb [2023-12-02 17:29:25,035 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urbs [2023-12-02 17:29:25,035 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urbs [2023-12-02 17:29:25,036 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_probe [2023-12-02 17:29:25,036 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_probe [2023-12-02 17:29:25,036 INFO L130 BoogieDeclarations]: Found specification of procedure module_put [2023-12-02 17:29:25,036 INFO L138 BoogieDeclarations]: Found implementation of procedure module_put [2023-12-02 17:29:25,036 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value_probe [2023-12-02 17:29:25,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value_probe [2023-12-02 17:29:25,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 17:29:25,037 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2023-12-02 17:29:25,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2023-12-02 17:29:25,037 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2023-12-02 17:29:25,037 INFO L130 BoogieDeclarations]: Found specification of procedure serial_get_icount [2023-12-02 17:29:25,037 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_get_icount [2023-12-02 17:29:25,037 INFO L130 BoogieDeclarations]: Found specification of procedure serial_throttle [2023-12-02 17:29:25,037 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_throttle [2023-12-02 17:29:25,038 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-12-02 17:29:25,038 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-12-02 17:29:25,038 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_submit_read_urb [2023-12-02 17:29:25,038 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_submit_read_urb [2023-12-02 17:29:25,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 17:29:25,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 17:29:25,038 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 17:29:25,038 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 17:29:25,038 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-12-02 17:29:25,039 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-12-02 17:29:25,039 INFO L130 BoogieDeclarations]: Found specification of procedure try_module_get [2023-12-02 17:29:25,039 INFO L138 BoogieDeclarations]: Found implementation of procedure try_module_get [2023-12-02 17:29:25,039 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2023-12-02 17:29:25,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~X~int~TO~int [2023-12-02 17:29:25,039 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-12-02 17:29:25,039 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-12-02 17:29:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2023-12-02 17:29:25,040 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2023-12-02 17:29:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2023-12-02 17:29:25,040 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2023-12-02 17:29:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-12-02 17:29:25,040 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-12-02 17:29:25,040 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_resume [2023-12-02 17:29:25,040 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_resume [2023-12-02 17:29:25,041 INFO L130 BoogieDeclarations]: Found specification of procedure serial_cleanup [2023-12-02 17:29:25,041 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_cleanup [2023-12-02 17:29:25,041 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-12-02 17:29:25,041 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-12-02 17:29:25,041 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-12-02 17:29:25,041 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-12-02 17:29:25,042 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_carrier_raised [2023-12-02 17:29:25,042 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_carrier_raised [2023-12-02 17:29:25,042 INFO L130 BoogieDeclarations]: Found specification of procedure __kfifo_uint_must_check_helper [2023-12-02 17:29:25,042 INFO L138 BoogieDeclarations]: Found implementation of procedure __kfifo_uint_must_check_helper [2023-12-02 17:29:25,042 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-12-02 17:29:25,042 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-12-02 17:29:25,042 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmget [2023-12-02 17:29:25,043 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmget [2023-12-02 17:29:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2023-12-02 17:29:25,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2023-12-02 17:29:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-12-02 17:29:25,043 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-12-02 17:29:25,043 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_probe [2023-12-02 17:29:25,043 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_probe [2023-12-02 17:29:25,044 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-12-02 17:29:25,044 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-12-02 17:29:25,044 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-12-02 17:29:25,044 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-12-02 17:29:25,044 INFO L130 BoogieDeclarations]: Found specification of procedure bus_unregister [2023-12-02 17:29:25,044 INFO L138 BoogieDeclarations]: Found implementation of procedure bus_unregister [2023-12-02 17:29:25,044 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_reset_resume [2023-12-02 17:29:25,045 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_reset_resume [2023-12-02 17:29:25,045 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_read_bulk_callback [2023-12-02 17:29:25,045 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_read_bulk_callback [2023-12-02 17:29:25,045 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2023-12-02 17:29:25,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2023-12-02 17:29:25,045 INFO L130 BoogieDeclarations]: Found specification of procedure usb_poison_urb [2023-12-02 17:29:25,045 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_poison_urb [2023-12-02 17:29:25,046 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface [2023-12-02 17:29:25,046 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface [2023-12-02 17:29:25,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 17:29:25,046 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister [2023-12-02 17:29:25,046 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister [2023-12-02 17:29:25,046 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2023-12-02 17:29:25,046 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2023-12-02 17:29:25,046 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-12-02 17:29:25,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-12-02 17:29:25,047 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_device_match [2023-12-02 17:29:25,047 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_device_match [2023-12-02 17:29:25,047 INFO L130 BoogieDeclarations]: Found specification of procedure serial_open [2023-12-02 17:29:25,047 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_open [2023-12-02 17:29:25,047 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-12-02 17:29:25,047 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-12-02 17:29:25,047 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-12-02 17:29:25,047 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-12-02 17:29:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure serial_port_shutdown [2023-12-02 17:29:25,048 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_port_shutdown [2023-12-02 17:29:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2023-12-02 17:29:25,048 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2023-12-02 17:29:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-12-02 17:29:25,048 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-12-02 17:29:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2023-12-02 17:29:25,048 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~pm_message_t~0~TO~int [2023-12-02 17:29:25,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 17:29:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-12-02 17:29:25,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-12-02 17:29:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_resume [2023-12-02 17:29:25,049 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_resume [2023-12-02 17:29:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2023-12-02 17:29:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_pr_debug [2023-12-02 17:29:25,049 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_pr_debug [2023-12-02 17:29:25,049 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2023-12-02 17:29:25,049 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2023-12-02 17:29:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-12-02 17:29:25,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-12-02 17:29:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2023-12-02 17:29:25,050 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2023-12-02 17:29:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_generic_unthrottle [2023-12-02 17:29:25,050 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_generic_unthrottle [2023-12-02 17:29:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_disc_mutex_of_usb_serial [2023-12-02 17:29:25,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_disc_mutex_of_usb_serial [2023-12-02 17:29:25,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 17:29:25,051 INFO L130 BoogieDeclarations]: Found specification of procedure serial_install [2023-12-02 17:29:25,051 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_install [2023-12-02 17:29:25,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 17:29:25,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 17:29:25,051 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-12-02 17:29:25,051 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-12-02 17:29:25,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-12-02 17:29:25,052 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2023-12-02 17:29:25,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2023-12-02 17:29:25,052 INFO L130 BoogieDeclarations]: Found specification of procedure serial_tiocmset [2023-12-02 17:29:25,052 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_tiocmset [2023-12-02 17:29:25,052 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_table_lock [2023-12-02 17:29:25,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_table_lock [2023-12-02 17:29:25,052 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-12-02 17:29:25,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-12-02 17:29:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_driver [2023-12-02 17:29:25,053 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_driver [2023-12-02 17:29:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_table_lock [2023-12-02 17:29:25,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_table_lock [2023-12-02 17:29:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-12-02 17:29:25,053 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-12-02 17:29:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_put [2023-12-02 17:29:25,053 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_put [2023-12-02 17:29:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_unpoison_port_urbs [2023-12-02 17:29:25,054 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_unpoison_port_urbs [2023-12-02 17:29:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2023-12-02 17:29:25,054 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2023-12-02 17:29:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure serial_write [2023-12-02 17:29:25,054 INFO L138 BoogieDeclarations]: Found implementation of procedure serial_write [2023-12-02 17:29:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-12-02 17:29:25,054 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-12-02 17:29:25,054 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_serial [2023-12-02 17:29:25,055 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_serial [2023-12-02 17:29:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-12-02 17:29:25,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-12-02 17:29:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure get_iface_id [2023-12-02 17:29:25,055 INFO L138 BoogieDeclarations]: Found implementation of procedure get_iface_id [2023-12-02 17:29:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-12-02 17:29:25,055 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-12-02 17:29:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 17:29:25,055 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2023-12-02 17:29:25,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2023-12-02 17:29:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 17:29:25,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 17:29:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2023-12-02 17:29:25,056 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2023-12-02 17:29:25,056 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2023-12-02 17:29:25,056 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2023-12-02 17:29:25,789 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 17:29:25,794 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 17:29:34,048 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 17:29:35,074 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 17:29:35,074 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 17:29:35,076 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:29:35 BoogieIcfgContainer [2023-12-02 17:29:35,076 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 17:29:35,080 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 17:29:35,080 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 17:29:35,083 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 17:29:35,083 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 05:29:21" (1/3) ... [2023-12-02 17:29:35,084 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea616a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:29:35, skipping insertion in model container [2023-12-02 17:29:35,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 05:29:24" (2/3) ... [2023-12-02 17:29:35,084 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ea616a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 05:29:35, skipping insertion in model container [2023-12-02 17:29:35,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 05:29:35" (3/3) ... [2023-12-02 17:29:35,086 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--usb--serial--usbserial.ko-ldv_main0.cil.out.i [2023-12-02 17:29:35,106 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 17:29:35,106 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 17:29:35,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 17:29:35,215 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;@415c1230, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 17:29:35,215 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 17:29:35,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 1668 states, 1021 states have (on average 1.3202742409402546) internal successors, (1348), 1053 states have internal predecessors, (1348), 527 states have call successors, (527), 118 states have call predecessors, (527), 118 states have return successors, (527), 513 states have call predecessors, (527), 527 states have call successors, (527) [2023-12-02 17:29:35,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 17:29:35,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:35,242 INFO L195 NwaCegarLoop]: trace histogram [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 17:29:35,242 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:35,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:35,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1086527161, now seen corresponding path program 1 times [2023-12-02 17:29:35,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:35,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707325057] [2023-12-02 17:29:35,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:35,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:35,995 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 17:29:35,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:35,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707325057] [2023-12-02 17:29:35,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707325057] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:35,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:35,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:29:35,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889290167] [2023-12-02 17:29:35,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:36,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:29:36,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:36,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:29:36,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:29:36,048 INFO L87 Difference]: Start difference. First operand has 1668 states, 1021 states have (on average 1.3202742409402546) internal successors, (1348), 1053 states have internal predecessors, (1348), 527 states have call successors, (527), 118 states have call predecessors, (527), 118 states have return successors, (527), 513 states have call predecessors, (527), 527 states have call successors, (527) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:29:38,753 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 17:29:40,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:40,855 INFO L93 Difference]: Finished difference Result 4708 states and 7050 transitions. [2023-12-02 17:29:40,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:29:40,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 23 [2023-12-02 17:29:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:40,897 INFO L225 Difference]: With dead ends: 4708 [2023-12-02 17:29:40,897 INFO L226 Difference]: Without dead ends: 3071 [2023-12-02 17:29:40,911 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 17:29:40,914 INFO L413 NwaCegarLoop]: 2262 mSDtfsCounter, 2382 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2382 SdHoareTripleChecker+Valid, 4131 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:40,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2382 Valid, 4131 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 432 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2023-12-02 17:29:40,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3071 states. [2023-12-02 17:29:41,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3071 to 3066. [2023-12-02 17:29:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3066 states, 1881 states have (on average 1.3179160021265284) internal successors, (2479), 1940 states have internal predecessors, (2479), 961 states have call successors, (961), 231 states have call predecessors, (961), 223 states have return successors, (1024), 909 states have call predecessors, (1024), 945 states have call successors, (1024) [2023-12-02 17:29:41,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3066 states to 3066 states and 4464 transitions. [2023-12-02 17:29:41,129 INFO L78 Accepts]: Start accepts. Automaton has 3066 states and 4464 transitions. Word has length 23 [2023-12-02 17:29:41,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:41,130 INFO L495 AbstractCegarLoop]: Abstraction has 3066 states and 4464 transitions. [2023-12-02 17:29:41,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:29:41,130 INFO L276 IsEmpty]: Start isEmpty. Operand 3066 states and 4464 transitions. [2023-12-02 17:29:41,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 17:29:41,132 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:41,132 INFO L195 NwaCegarLoop]: trace histogram [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 17:29:41,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 17:29:41,132 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:41,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:41,133 INFO L85 PathProgramCache]: Analyzing trace with hash -679454172, now seen corresponding path program 1 times [2023-12-02 17:29:41,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:41,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780963626] [2023-12-02 17:29:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:41,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:41,409 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 17:29:41,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:41,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780963626] [2023-12-02 17:29:41,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780963626] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:41,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:41,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:29:41,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251980331] [2023-12-02 17:29:41,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:41,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:29:41,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:41,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:29:41,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:29:41,413 INFO L87 Difference]: Start difference. First operand 3066 states and 4464 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:29:44,396 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 17:29:45,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:45,325 INFO L93 Difference]: Finished difference Result 3068 states and 4465 transitions. [2023-12-02 17:29:45,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:29:45,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-12-02 17:29:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:45,348 INFO L225 Difference]: With dead ends: 3068 [2023-12-02 17:29:45,348 INFO L226 Difference]: Without dead ends: 3065 [2023-12-02 17:29:45,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:29:45,352 INFO L413 NwaCegarLoop]: 2165 mSDtfsCounter, 2372 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2372 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:45,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2372 Valid, 2166 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-12-02 17:29:45,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2023-12-02 17:29:45,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 3065. [2023-12-02 17:29:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 1881 states have (on average 1.3173843700159489) internal successors, (2478), 1939 states have internal predecessors, (2478), 960 states have call successors, (960), 231 states have call predecessors, (960), 223 states have return successors, (1024), 909 states have call predecessors, (1024), 945 states have call successors, (1024) [2023-12-02 17:29:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 4462 transitions. [2023-12-02 17:29:45,504 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 4462 transitions. Word has length 24 [2023-12-02 17:29:45,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:45,504 INFO L495 AbstractCegarLoop]: Abstraction has 3065 states and 4462 transitions. [2023-12-02 17:29:45,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:29:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 4462 transitions. [2023-12-02 17:29:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 17:29:45,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:45,506 INFO L195 NwaCegarLoop]: trace histogram [1, 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 17:29:45,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 17:29:45,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:45,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash 409704220, now seen corresponding path program 1 times [2023-12-02 17:29:45,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:45,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836332062] [2023-12-02 17:29:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:45,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:45,764 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 17:29:45,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:45,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836332062] [2023-12-02 17:29:45,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836332062] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:45,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:45,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:29:45,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102224152] [2023-12-02 17:29:45,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:45,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:29:45,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:45,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:29:45,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:29:45,767 INFO L87 Difference]: Start difference. First operand 3065 states and 4462 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:29:48,937 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 17:29:50,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:50,022 INFO L93 Difference]: Finished difference Result 3067 states and 4463 transitions. [2023-12-02 17:29:50,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:29:50,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-12-02 17:29:50,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:50,047 INFO L225 Difference]: With dead ends: 3067 [2023-12-02 17:29:50,047 INFO L226 Difference]: Without dead ends: 3064 [2023-12-02 17:29:50,050 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 17:29:50,052 INFO L413 NwaCegarLoop]: 2163 mSDtfsCounter, 2369 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2369 SdHoareTripleChecker+Valid, 2164 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:50,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2369 Valid, 2164 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-12-02 17:29:50,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2023-12-02 17:29:50,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 3064. [2023-12-02 17:29:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 1881 states have (on average 1.3168527379053694) internal successors, (2477), 1938 states have internal predecessors, (2477), 959 states have call successors, (959), 231 states have call predecessors, (959), 223 states have return successors, (1024), 909 states have call predecessors, (1024), 945 states have call successors, (1024) [2023-12-02 17:29:50,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 4460 transitions. [2023-12-02 17:29:50,315 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 4460 transitions. Word has length 25 [2023-12-02 17:29:50,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:50,315 INFO L495 AbstractCegarLoop]: Abstraction has 3064 states and 4460 transitions. [2023-12-02 17:29:50,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:29:50,316 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 4460 transitions. [2023-12-02 17:29:50,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 17:29:50,317 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:50,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 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 17:29:50,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 17:29:50,318 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:50,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:50,318 INFO L85 PathProgramCache]: Analyzing trace with hash -186119129, now seen corresponding path program 1 times [2023-12-02 17:29:50,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:50,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727095608] [2023-12-02 17:29:50,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:50,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:50,593 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 17:29:50,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:50,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727095608] [2023-12-02 17:29:50,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727095608] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:50,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:50,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:29:50,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265473886] [2023-12-02 17:29:50,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:50,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:29:50,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:50,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:29:50,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:29:50,596 INFO L87 Difference]: Start difference. First operand 3064 states and 4460 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:29:53,723 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 17:29:54,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:29:54,854 INFO L93 Difference]: Finished difference Result 3174 states and 4573 transitions. [2023-12-02 17:29:54,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:29:54,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 26 [2023-12-02 17:29:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:29:54,890 INFO L225 Difference]: With dead ends: 3174 [2023-12-02 17:29:54,890 INFO L226 Difference]: Without dead ends: 3156 [2023-12-02 17:29:54,893 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 17:29:54,896 INFO L413 NwaCegarLoop]: 2196 mSDtfsCounter, 2211 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2211 SdHoareTripleChecker+Valid, 2378 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:29:54,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2211 Valid, 2378 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-12-02 17:29:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2023-12-02 17:29:55,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 3152. [2023-12-02 17:29:55,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 1937 states have (on average 1.312338668043366) internal successors, (2542), 1991 states have internal predecessors, (2542), 966 states have call successors, (966), 256 states have call predecessors, (966), 248 states have return successors, (1034), 919 states have call predecessors, (1034), 955 states have call successors, (1034) [2023-12-02 17:29:55,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 4542 transitions. [2023-12-02 17:29:55,147 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 4542 transitions. Word has length 26 [2023-12-02 17:29:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:29:55,147 INFO L495 AbstractCegarLoop]: Abstraction has 3152 states and 4542 transitions. [2023-12-02 17:29:55,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 17:29:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 4542 transitions. [2023-12-02 17:29:55,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 17:29:55,154 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:29:55,154 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, 1, 1] [2023-12-02 17:29:55,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 17:29:55,155 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:29:55,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:29:55,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1884755747, now seen corresponding path program 1 times [2023-12-02 17:29:55,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:29:55,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442760328] [2023-12-02 17:29:55,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:29:55,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:29:55,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:29:55,506 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 17:29:55,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:29:55,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442760328] [2023-12-02 17:29:55,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442760328] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:29:55,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:29:55,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 17:29:55,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341548694] [2023-12-02 17:29:55,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:29:55,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 17:29:55,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:29:55,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 17:29:55,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 17:29:55,510 INFO L87 Difference]: Start difference. First operand 3152 states and 4542 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:29:58,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 17:30:00,568 WARN L539 Checker$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 17:30:02,577 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 17:30:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:04,845 INFO L93 Difference]: Finished difference Result 6140 states and 8849 transitions. [2023-12-02 17:30:04,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 17:30:04,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-12-02 17:30:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:04,865 INFO L225 Difference]: With dead ends: 6140 [2023-12-02 17:30:04,865 INFO L226 Difference]: Without dead ends: 3152 [2023-12-02 17:30:04,879 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 17:30:04,880 INFO L413 NwaCegarLoop]: 2155 mSDtfsCounter, 1 mSDsluCounter, 4305 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 6460 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:04,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 6460 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 667 Invalid, 3 Unknown, 0 Unchecked, 9.1s Time] [2023-12-02 17:30:04,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2023-12-02 17:30:05,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 3152. [2023-12-02 17:30:05,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 1937 states have (on average 1.3118224057821373) internal successors, (2541), 1991 states have internal predecessors, (2541), 966 states have call successors, (966), 256 states have call predecessors, (966), 248 states have return successors, (1034), 919 states have call predecessors, (1034), 955 states have call successors, (1034) [2023-12-02 17:30:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 4541 transitions. [2023-12-02 17:30:05,058 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 4541 transitions. Word has length 46 [2023-12-02 17:30:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:05,058 INFO L495 AbstractCegarLoop]: Abstraction has 3152 states and 4541 transitions. [2023-12-02 17:30:05,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-02 17:30:05,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 4541 transitions. [2023-12-02 17:30:05,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 17:30:05,063 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:05,063 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-02 17:30:05,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 17:30:05,064 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:05,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:05,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1679388787, now seen corresponding path program 1 times [2023-12-02 17:30:05,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:05,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413428387] [2023-12-02 17:30:05,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:05,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:30:05,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:05,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413428387] [2023-12-02 17:30:05,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413428387] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 17:30:05,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 17:30:05,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 17:30:05,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684352545] [2023-12-02 17:30:05,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 17:30:05,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 17:30:05,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 17:30:05,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 17:30:05,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 17:30:05,342 INFO L87 Difference]: Start difference. First operand 3152 states and 4541 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 17:30:08,814 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 [] [2023-12-02 17:30:10,820 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 17:30:12,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 17:30:12,393 INFO L93 Difference]: Finished difference Result 6293 states and 9068 transitions. [2023-12-02 17:30:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 17:30:12,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 61 [2023-12-02 17:30:12,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 17:30:12,413 INFO L225 Difference]: With dead ends: 6293 [2023-12-02 17:30:12,413 INFO L226 Difference]: Without dead ends: 3153 [2023-12-02 17:30:12,427 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 17:30:12,428 INFO L413 NwaCegarLoop]: 2155 mSDtfsCounter, 0 mSDsluCounter, 2152 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 4307 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-12-02 17:30:12,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 4307 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 442 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2023-12-02 17:30:12,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3153 states. [2023-12-02 17:30:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3153 to 3153. [2023-12-02 17:30:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 1938 states have (on average 1.3116615067079462) internal successors, (2542), 1992 states have internal predecessors, (2542), 966 states have call successors, (966), 256 states have call predecessors, (966), 248 states have return successors, (1034), 919 states have call predecessors, (1034), 955 states have call successors, (1034) [2023-12-02 17:30:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 4542 transitions. [2023-12-02 17:30:12,619 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 4542 transitions. Word has length 61 [2023-12-02 17:30:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 17:30:12,620 INFO L495 AbstractCegarLoop]: Abstraction has 3153 states and 4542 transitions. [2023-12-02 17:30:12,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 17:30:12,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 4542 transitions. [2023-12-02 17:30:12,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 17:30:12,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 17:30:12,624 INFO L195 NwaCegarLoop]: trace histogram [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 17:30:12,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 17:30:12,624 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 17:30:12,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 17:30:12,625 INFO L85 PathProgramCache]: Analyzing trace with hash -592795880, now seen corresponding path program 1 times [2023-12-02 17:30:12,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 17:30:12,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126863691] [2023-12-02 17:30:12,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:12,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 17:30:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:30:12,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 17:30:12,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126863691] [2023-12-02 17:30:12,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126863691] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 17:30:12,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211956687] [2023-12-02 17:30:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 17:30:12,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 17:30:12,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 17:30:12,966 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 17:30:12,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c5a95c8-ac0d-45d9-9214-b28aa1461ca7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 17:30:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 17:30:14,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 3052 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 17:30:14,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 17:30:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 17:30:14,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 17:30:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 17:30:14,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211956687] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 17:30:14,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2038757491] [2023-12-02 17:30:14,208 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2023-12-02 17:30:14,208 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 17:30:14,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 17:30:14,216 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 17:30:14,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 17:35:18,025 WARN L293 SmtUtils]: Spent 7.31s on a formula simplification. DAG size of input: 3406 DAG size of output: 3406 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 17:35:23,718 WARN L293 SmtUtils]: Spent 5.68s on a formula simplification that was a NOOP. DAG size: 3405 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 17:35:28,747 WARN L293 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 3405 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 17:35:36,620 WARN L293 SmtUtils]: Spent 7.86s on a formula simplification. DAG size of input: 3406 DAG size of output: 3406 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 17:36:51,707 WARN L293 SmtUtils]: Spent 5.17s on a formula simplification that was a NOOP. DAG size: 3316 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 17:42:50,885 INFO L197 IcfgInterpreter]: Interpreting procedure ldv__builtin_expect with input of size 3393 for LOIs [2023-12-02 17:43:54,573 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_handler_precall with input of size 3259 for LOIs