./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--tty--isicom.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--tty--isicom.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5 --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 f2c7848ca043d8b9ca4f9ab4b1ce08f583c2bd8d8967a557df683af547558d91 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:36:22,569 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:36:22,654 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-21 19:36:22,660 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:36:22,661 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:36:22,686 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:36:22,687 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:36:22,688 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:36:22,689 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:36:22,690 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:36:22,690 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:36:22,691 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:36:22,692 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:36:22,693 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:36:22,693 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:36:22,694 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:36:22,695 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:36:22,695 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:36:22,696 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:36:22,697 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:36:22,699 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:36:22,702 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:36:22,703 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:36:22,703 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:36:22,704 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:36:22,704 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:36:22,705 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:36:22,705 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:36:22,706 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:36:22,707 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:36:22,707 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:36:22,708 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:36:22,708 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:36:22,709 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:36:22,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:36:22,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:36:22,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:36:22,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:36:22,712 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:36:22,713 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:36:22,713 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:36:22,717 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:36:22,718 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:36:22,718 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:36:22,718 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_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2c7848ca043d8b9ca4f9ab4b1ce08f583c2bd8d8967a557df683af547558d91 [2023-11-21 19:36:23,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:36:23,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:36:23,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:36:23,055 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:36:23,056 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:36:23,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--tty--isicom.ko-entry_point.cil.out.i [2023-11-21 19:36:26,175 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:36:26,775 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:36:26,776 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--tty--isicom.ko-entry_point.cil.out.i [2023-11-21 19:36:26,821 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/data/718f09529/6e230c07916143a7a7372c2c69cfbb74/FLAG21075e57d [2023-11-21 19:36:26,838 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/data/718f09529/6e230c07916143a7a7372c2c69cfbb74 [2023-11-21 19:36:26,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:36:26,850 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:36:26,852 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:36:26,853 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:36:26,858 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:36:26,859 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:36:26" (1/1) ... [2023-11-21 19:36:26,860 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bc76aa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:26, skipping insertion in model container [2023-11-21 19:36:26,860 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:36:26" (1/1) ... [2023-11-21 19:36:26,986 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:36:27,584 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3602] [2023-11-21 19:36:27,585 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3603-3604] [2023-11-21 19:36:27,915 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_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--tty--isicom.ko-entry_point.cil.out.i[110145,110158] [2023-11-21 19:36:28,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:36:29,219 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:36:29,327 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3602] [2023-11-21 19:36:29,328 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3603-3604] [2023-11-21 19:36:29,332 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "m" (__preempt_count)); [3705] [2023-11-21 19:36:29,334 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "m" (__preempt_count)); [3708] [2023-11-21 19:36:29,335 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "m" (__preempt_count)); [3711] [2023-11-21 19:36:29,335 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "m" (__preempt_count)); [3714] [2023-11-21 19:36:29,338 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outw %w0, %w1": : "a" (value), "Nd" (port)); [3768] [2023-11-21 19:36:29,338 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inw %w1, %w0": "=a" (value): "Nd" (port)); [3776] [2023-11-21 19:36:29,339 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("rep; outsw": "+S" (addr), "+c" (count): "d" (port)); [3783] [2023-11-21 19:36:29,340 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("rep; insw": "+D" (addr), "+c" (count): "d" (port)); [3790] [2023-11-21 19:36:29,345 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_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--tty--isicom.ko-entry_point.cil.out.i[110145,110158] [2023-11-21 19:36:29,599 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:36:29,705 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:36:29,714 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:36:29,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:29 WrapperNode [2023-11-21 19:36:29,715 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:36:29,716 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:36:29,716 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:36:29,716 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:36:29,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:29" (1/1) ... [2023-11-21 19:36:29,807 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:29" (1/1) ... [2023-11-21 19:36:30,048 INFO L138 Inliner]: procedures = 199, calls = 1545, calls flagged for inlining = 95, calls inlined = 93, statements flattened = 4386 [2023-11-21 19:36:30,049 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:36:30,049 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:36:30,050 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:36:30,050 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:36:30,060 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:29" (1/1) ... [2023-11-21 19:36:30,061 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:29" (1/1) ... [2023-11-21 19:36:30,116 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:29" (1/1) ... [2023-11-21 19:36:30,117 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:29" (1/1) ... [2023-11-21 19:36:30,248 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:29" (1/1) ... [2023-11-21 19:36:30,293 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:29" (1/1) ... [2023-11-21 19:36:30,322 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:29" (1/1) ... [2023-11-21 19:36:30,345 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:29" (1/1) ... [2023-11-21 19:36:30,378 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:36:30,380 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:36:30,380 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:36:30,380 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:36:30,381 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:29" (1/1) ... [2023-11-21 19:36:30,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:36:30,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:36:30,418 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:36:30,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:36:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_start [2023-11-21 19:36:30,458 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_start [2023-11-21 19:36:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_set_termios [2023-11-21 19:36:30,458 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_set_termios [2023-11-21 19:36:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2023-11-21 19:36:30,459 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2023-11-21 19:36:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-21 19:36:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-21 19:36:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-21 19:36:30,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-21 19:36:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure tty_kref_put [2023-11-21 19:36:30,460 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_kref_put [2023-11-21 19:36:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-21 19:36:30,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-21 19:36:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_tiocmset [2023-11-21 19:36:30,462 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_tiocmset [2023-11-21 19:36:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_3 [2023-11-21 19:36:30,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_3 [2023-11-21 19:36:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-21 19:36:30,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-21 19:36:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_region [2023-11-21 19:36:30,466 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_region [2023-11-21 19:36:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure char_buf_ptr [2023-11-21 19:36:30,467 INFO L138 BoogieDeclarations]: Found implementation of procedure char_buf_ptr [2023-11-21 19:36:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure raise_dtr [2023-11-21 19:36:30,467 INFO L138 BoogieDeclarations]: Found implementation of procedure raise_dtr [2023-11-21 19:36:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure tty_flip_buffer_push [2023-11-21 19:36:30,467 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_flip_buffer_push [2023-11-21 19:36:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_chars_in_buffer [2023-11-21 19:36:30,468 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_chars_in_buffer [2023-11-21 19:36:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure tty_insert_flip_char [2023-11-21 19:36:30,468 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_insert_flip_char [2023-11-21 19:36:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2023-11-21 19:36:30,468 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2023-11-21 19:36:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_flush_buffer [2023-11-21 19:36:30,468 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_flush_buffer [2023-11-21 19:36:30,469 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-21 19:36:30,469 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-21 19:36:30,469 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-21 19:36:30,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-21 19:36:30,469 INFO L130 BoogieDeclarations]: Found specification of procedure outsw [2023-11-21 19:36:30,469 INFO L138 BoogieDeclarations]: Found implementation of procedure outsw [2023-11-21 19:36:30,470 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 19:36:30,470 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 19:36:30,470 INFO L130 BoogieDeclarations]: Found specification of procedure insw [2023-11-21 19:36:30,470 INFO L138 BoogieDeclarations]: Found implementation of procedure insw [2023-11-21 19:36:30,471 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_put_char [2023-11-21 19:36:30,471 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_put_char [2023-11-21 19:36:30,471 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:36:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 19:36:30,473 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2023-11-21 19:36:30,473 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2023-11-21 19:36:30,473 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_write_room [2023-11-21 19:36:30,473 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_write_room [2023-11-21 19:36:30,473 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_ioctl [2023-11-21 19:36:30,474 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_ioctl [2023-11-21 19:36:30,474 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-11-21 19:36:30,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-11-21 19:36:30,474 INFO L130 BoogieDeclarations]: Found specification of procedure drop_dtr [2023-11-21 19:36:30,474 INFO L138 BoogieDeclarations]: Found implementation of procedure drop_dtr [2023-11-21 19:36:30,474 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-21 19:36:30,474 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-21 19:36:30,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:36:30,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 19:36:30,476 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-21 19:36:30,476 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-21 19:36:30,476 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-21 19:36:30,476 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-21 19:36:30,476 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-21 19:36:30,476 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-21 19:36:30,477 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2023-11-21 19:36:30,477 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2023-11-21 19:36:30,477 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2023-11-21 19:36:30,478 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2023-11-21 19:36:30,478 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2023-11-21 19:36:30,478 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2023-11-21 19:36:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_get [2023-11-21 19:36:30,479 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_get [2023-11-21 19:36:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-21 19:36:30,479 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-21 19:36:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-21 19:36:30,479 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_dtr_rts [2023-11-21 19:36:30,479 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_dtr_rts [2023-11-21 19:36:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-21 19:36:30,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-21 19:36:30,480 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-21 19:36:30,480 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-21 19:36:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_config_port [2023-11-21 19:36:30,481 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_config_port [2023-11-21 19:36:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-21 19:36:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure _dev_info [2023-11-21 19:36:30,481 INFO L138 BoogieDeclarations]: Found implementation of procedure _dev_info [2023-11-21 19:36:30,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:36:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_tiocmget [2023-11-21 19:36:30,482 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_tiocmget [2023-11-21 19:36:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_unthrottle [2023-11-21 19:36:30,482 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_unthrottle [2023-11-21 19:36:30,482 INFO L130 BoogieDeclarations]: Found specification of procedure lock_card [2023-11-21 19:36:30,483 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_card [2023-11-21 19:36:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_flush_chars [2023-11-21 19:36:30,483 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_flush_chars [2023-11-21 19:36:30,483 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-21 19:36:30,484 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-21 19:36:30,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:36:30,484 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2023-11-21 19:36:30,485 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2023-11-21 19:36:30,485 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-11-21 19:36:30,485 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-11-21 19:36:30,485 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2023-11-21 19:36:30,486 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2023-11-21 19:36:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_pr_debug [2023-11-21 19:36:30,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_pr_debug [2023-11-21 19:36:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-21 19:36:30,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-21 19:36:30,486 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_carrier_raised [2023-11-21 19:36:30,486 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_carrier_raised [2023-11-21 19:36:30,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:36:30,487 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_hangup [2023-11-21 19:36:30,487 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_hangup [2023-11-21 19:36:30,487 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_throttle [2023-11-21 19:36:30,487 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_throttle [2023-11-21 19:36:30,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:36:30,488 INFO L130 BoogieDeclarations]: Found specification of procedure tty_wakeup [2023-11-21 19:36:30,488 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_wakeup [2023-11-21 19:36:30,488 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-21 19:36:30,489 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-21 19:36:30,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 19:36:30,489 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-11-21 19:36:30,489 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2023-11-21 19:36:30,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2023-11-21 19:36:30,489 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2023-11-21 19:36:30,489 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2023-11-21 19:36:30,490 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2023-11-21 19:36:30,490 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2023-11-21 19:36:30,492 INFO L130 BoogieDeclarations]: Found specification of procedure unlock_card [2023-11-21 19:36:30,495 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock_card [2023-11-21 19:36:30,496 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-11-21 19:36:30,502 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-11-21 19:36:30,502 INFO L130 BoogieDeclarations]: Found specification of procedure isicom_send_break [2023-11-21 19:36:30,503 INFO L138 BoogieDeclarations]: Found implementation of procedure isicom_send_break [2023-11-21 19:36:30,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:36:30,504 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2023-11-21 19:36:30,504 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2023-11-21 19:36:30,505 INFO L130 BoogieDeclarations]: Found specification of procedure WaitTillCardIsFree [2023-11-21 19:36:30,510 INFO L138 BoogieDeclarations]: Found implementation of procedure WaitTillCardIsFree [2023-11-21 19:36:30,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:36:30,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:36:30,510 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2023-11-21 19:36:30,510 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2023-11-21 19:36:30,510 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-21 19:36:30,511 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-21 19:36:31,155 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:36:31,162 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:36:32,086 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-21 19:36:39,266 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:36:42,384 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:36:42,384 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 19:36:42,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:36:42 BoogieIcfgContainer [2023-11-21 19:36:42,387 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:36:42,390 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:36:42,390 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:36:42,393 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:36:42,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:36:26" (1/3) ... [2023-11-21 19:36:42,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526c814a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:36:42, skipping insertion in model container [2023-11-21 19:36:42,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:36:29" (2/3) ... [2023-11-21 19:36:42,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526c814a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:36:42, skipping insertion in model container [2023-11-21 19:36:42,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:36:42" (3/3) ... [2023-11-21 19:36:42,398 INFO L112 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--tty--isicom.ko-entry_point.cil.out.i [2023-11-21 19:36:42,419 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:36:42,420 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:36:42,528 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:36:42,540 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;@85bd41c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:36:42,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:36:42,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 1126 states, 701 states have (on average 1.405135520684736) internal successors, (985), 732 states have internal predecessors, (985), 358 states have call successors, (358), 67 states have call predecessors, (358), 66 states have return successors, (350), 348 states have call predecessors, (350), 350 states have call successors, (350) [2023-11-21 19:36:42,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-21 19:36:42,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:42,607 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:42,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:36:42,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:42,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1182919129, now seen corresponding path program 1 times [2023-11-21 19:36:42,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:42,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143356123] [2023-11-21 19:36:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:42,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2023-11-21 19:36:43,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:43,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143356123] [2023-11-21 19:36:43,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143356123] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:43,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:43,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:36:43,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105829356] [2023-11-21 19:36:43,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:43,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:36:43,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:43,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:36:43,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:36:43,694 INFO L87 Difference]: Start difference. First operand has 1126 states, 701 states have (on average 1.405135520684736) internal successors, (985), 732 states have internal predecessors, (985), 358 states have call successors, (358), 67 states have call predecessors, (358), 66 states have return successors, (350), 348 states have call predecessors, (350), 350 states have call successors, (350) Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-21 19:36:46,328 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 [] [2023-11-21 19:36:49,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:36:51,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:36:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:51,889 INFO L93 Difference]: Finished difference Result 3134 states and 4776 transitions. [2023-11-21 19:36:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:36:51,894 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 151 [2023-11-21 19:36:51,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:51,928 INFO L225 Difference]: With dead ends: 3134 [2023-11-21 19:36:51,928 INFO L226 Difference]: Without dead ends: 1988 [2023-11-21 19:36:51,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:36:51,946 INFO L413 NwaCegarLoop]: 1509 mSDtfsCounter, 1342 mSDsluCounter, 1491 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1342 SdHoareTripleChecker+Valid, 3000 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:51,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1342 Valid, 3000 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 354 Invalid, 3 Unknown, 0 Unchecked, 7.9s Time] [2023-11-21 19:36:51,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2023-11-21 19:36:52,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1988. [2023-11-21 19:36:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1259 states have (on average 1.3971405877680698) internal successors, (1759), 1299 states have internal predecessors, (1759), 608 states have call successors, (608), 121 states have call predecessors, (608), 120 states have return successors, (607), 603 states have call predecessors, (607), 607 states have call successors, (607) [2023-11-21 19:36:52,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 2974 transitions. [2023-11-21 19:36:52,198 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 2974 transitions. Word has length 151 [2023-11-21 19:36:52,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:52,199 INFO L495 AbstractCegarLoop]: Abstraction has 1988 states and 2974 transitions. [2023-11-21 19:36:52,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2023-11-21 19:36:52,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 2974 transitions. [2023-11-21 19:36:52,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-21 19:36:52,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:52,224 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:52,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:36:52,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:36:52,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash -374511688, now seen corresponding path program 1 times [2023-11-21 19:36:52,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:52,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065324805] [2023-11-21 19:36:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:52,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-11-21 19:36:52,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:52,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065324805] [2023-11-21 19:36:52,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065324805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:52,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:52,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:36:52,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713509139] [2023-11-21 19:36:52,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:52,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:36:52,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:52,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:36:52,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:36:52,947 INFO L87 Difference]: Start difference. First operand 1988 states and 2974 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2023-11-21 19:36:55,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:36:57,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:36:58,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:36:58,482 INFO L93 Difference]: Finished difference Result 3963 states and 5932 transitions. [2023-11-21 19:36:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:36:58,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 203 [2023-11-21 19:36:58,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:36:58,502 INFO L225 Difference]: With dead ends: 3963 [2023-11-21 19:36:58,502 INFO L226 Difference]: Without dead ends: 1992 [2023-11-21 19:36:58,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:36:58,514 INFO L413 NwaCegarLoop]: 1485 mSDtfsCounter, 2 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2967 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:36:58,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2967 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 348 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2023-11-21 19:36:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2023-11-21 19:36:58,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1990. [2023-11-21 19:36:58,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1990 states, 1261 states have (on average 1.3965107057890562) internal successors, (1761), 1301 states have internal predecessors, (1761), 608 states have call successors, (608), 121 states have call predecessors, (608), 120 states have return successors, (607), 603 states have call predecessors, (607), 607 states have call successors, (607) [2023-11-21 19:36:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1990 states to 1990 states and 2976 transitions. [2023-11-21 19:36:58,643 INFO L78 Accepts]: Start accepts. Automaton has 1990 states and 2976 transitions. Word has length 203 [2023-11-21 19:36:58,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:36:58,649 INFO L495 AbstractCegarLoop]: Abstraction has 1990 states and 2976 transitions. [2023-11-21 19:36:58,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2023-11-21 19:36:58,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1990 states and 2976 transitions. [2023-11-21 19:36:58,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2023-11-21 19:36:58,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:36:58,669 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:36:58,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:36:58,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:36:58,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:36:58,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1014029657, now seen corresponding path program 1 times [2023-11-21 19:36:58,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:36:58,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204909954] [2023-11-21 19:36:58,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:36:58,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:36:58,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:36:59,197 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-11-21 19:36:59,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:36:59,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204909954] [2023-11-21 19:36:59,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204909954] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:36:59,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:36:59,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:36:59,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033347381] [2023-11-21 19:36:59,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:36:59,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:36:59,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:36:59,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:36:59,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:36:59,201 INFO L87 Difference]: Start difference. First operand 1990 states and 2976 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2023-11-21 19:37:01,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:37:03,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-21 19:37:04,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:37:04,749 INFO L93 Difference]: Finished difference Result 3965 states and 5932 transitions. [2023-11-21 19:37:04,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:37:04,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 205 [2023-11-21 19:37:04,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:37:04,769 INFO L225 Difference]: With dead ends: 3965 [2023-11-21 19:37:04,769 INFO L226 Difference]: Without dead ends: 1992 [2023-11-21 19:37:04,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:37:04,781 INFO L413 NwaCegarLoop]: 1486 mSDtfsCounter, 0 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2969 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-21 19:37:04,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2969 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 346 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2023-11-21 19:37:04,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2023-11-21 19:37:04,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1992. [2023-11-21 19:37:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1263 states have (on average 1.395882818685669) internal successors, (1763), 1303 states have internal predecessors, (1763), 608 states have call successors, (608), 121 states have call predecessors, (608), 120 states have return successors, (607), 603 states have call predecessors, (607), 607 states have call successors, (607) [2023-11-21 19:37:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 2978 transitions. [2023-11-21 19:37:04,901 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 2978 transitions. Word has length 205 [2023-11-21 19:37:04,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:37:04,902 INFO L495 AbstractCegarLoop]: Abstraction has 1992 states and 2978 transitions. [2023-11-21 19:37:04,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 3 states have internal predecessors, (94), 2 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2023-11-21 19:37:04,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 2978 transitions. [2023-11-21 19:37:04,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-11-21 19:37:04,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:37:04,921 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:37:04,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:37:04,922 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:37:04,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:37:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1639655620, now seen corresponding path program 1 times [2023-11-21 19:37:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:37:04,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261042129] [2023-11-21 19:37:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:37:04,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:37:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:37:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-11-21 19:37:05,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:37:05,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261042129] [2023-11-21 19:37:05,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261042129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:37:05,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503520571] [2023-11-21 19:37:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:37:05,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:37:05,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:37:05,477 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:37:05,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ecea3bb-7319-4e73-ae1f-839ad3f805d0/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:37:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:37:06,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 2714 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-21 19:37:06,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:37:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 69 proven. 1 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-11-21 19:37:06,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:37:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2023-11-21 19:37:07,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503520571] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:37:07,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091688] [2023-11-21 19:37:07,080 INFO L159 IcfgInterpreter]: Started Sifa with 136 locations of interest [2023-11-21 19:37:07,080 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:37:07,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:37:07,090 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:37:07,091 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs