./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru.ko-entry_point.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_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/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_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/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_e3d2be94-59e8-496b-8287-f5e3bca3db2b/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 20e4a1f568783894f17840aa5f338f3fb65a6686c2b0eb1bb7dec08049ab8d00 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:59:43,832 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:59:43,894 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 14:59:43,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:59:43,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:59:43,922 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:59:43,922 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:59:43,923 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:59:43,923 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:59:43,924 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:59:43,925 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:59:43,925 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:59:43,926 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:59:43,926 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:59:43,927 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:59:43,927 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:59:43,928 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:59:43,928 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:59:43,929 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:59:43,929 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:59:43,930 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:59:43,931 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:59:43,931 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:59:43,932 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 14:59:43,932 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:59:43,933 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:59:43,933 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 14:59:43,934 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:59:43,934 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 14:59:43,934 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 14:59:43,935 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:59:43,935 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:59:43,935 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:59:43,936 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:59:43,936 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:59:43,936 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:59:43,936 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:59:43,937 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 14:59:43,937 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:59:43,937 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:59:43,937 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:59:43,937 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 14:59:43,938 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:59:43,938 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:59:43,938 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_e3d2be94-59e8-496b-8287-f5e3bca3db2b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20e4a1f568783894f17840aa5f338f3fb65a6686c2b0eb1bb7dec08049ab8d00 [2023-12-02 14:59:44,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:59:44,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:59:44,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:59:44,168 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:59:44,168 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:59:44,169 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru.ko-entry_point.cil.out.i [2023-12-02 14:59:46,998 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:59:47,391 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:59:47,391 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru.ko-entry_point.cil.out.i [2023-12-02 14:59:47,431 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/data/9e0438d13/e3dce253bd4d4abc84e536257b6c938e/FLAG545eaf7eb [2023-12-02 14:59:47,446 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/data/9e0438d13/e3dce253bd4d4abc84e536257b6c938e [2023-12-02 14:59:47,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:59:47,450 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:59:47,452 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:59:47,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:59:47,457 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:59:47,458 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:59:47" (1/1) ... [2023-12-02 14:59:47,459 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e119596 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:59:47, skipping insertion in model container [2023-12-02 14:59:47,459 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:59:47" (1/1) ... [2023-12-02 14:59:47,573 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:59:48,595 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_e3d2be94-59e8-496b-8287-f5e3bca3db2b/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru.ko-entry_point.cil.out.i[175998,176011] [2023-12-02 14:59:48,689 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:59:48,736 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:59:48,822 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [2452] [2023-12-02 14:59:48,824 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2455] [2023-12-02 14:59:48,824 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2458] [2023-12-02 14:59:48,824 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [2461] [2023-12-02 14:59:48,830 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [2613] [2023-12-02 14:59:48,831 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [2621] [2023-12-02 14:59:48,846 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgb %b0, %1\n": "+q" (__ret), "+m" (tmp___2->state): : "memory", "cc"); [2899-2900] [2023-12-02 14:59:48,846 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgw %w0, %1\n": "+r" (__ret), "+m" (tmp___3->state): : "memory", "cc"); [2904-2905] [2023-12-02 14:59:48,847 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgl %0, %1\n": "+r" (__ret), "+m" (tmp___4->state): : "memory", "cc"); [2909-2910] [2023-12-02 14:59:48,847 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgq %q0, %1\n": "+r" (__ret), "+m" (tmp___5->state): : "memory", "cc"); [2914-2915] [2023-12-02 14:59:48,863 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgb %b0, %1\n": "+q" (__ret), "+m" (tmp___4->state): : "memory", "cc"); [3218-3219] [2023-12-02 14:59:48,864 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgw %w0, %1\n": "+r" (__ret), "+m" (tmp___5->state): : "memory", "cc"); [3223-3224] [2023-12-02 14:59:48,864 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgl %0, %1\n": "+r" (__ret), "+m" (tmp___6->state): : "memory", "cc"); [3228-3229] [2023-12-02 14:59:48,865 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgq %q0, %1\n": "+r" (__ret), "+m" (tmp___7->state): : "memory", "cc"); [3233-3234] [2023-12-02 14:59:48,870 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgb %b0, %1\n": "+q" (__ret___0), "+m" (tmp___15->state): : "memory", "cc"); [3313-3314] [2023-12-02 14:59:48,870 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgw %w0, %1\n": "+r" (__ret___0), "+m" (tmp___16->state): : "memory", "cc"); [3318-3319] [2023-12-02 14:59:48,871 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgl %0, %1\n": "+r" (__ret___0), "+m" (tmp___17->state): : "memory", "cc"); [3323-3324] [2023-12-02 14:59:48,871 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("xchgq %q0, %1\n": "+r" (__ret___0), "+m" (tmp___18->state): : "memory", "cc"); [3328-3329] [2023-12-02 14:59:48,997 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_e3d2be94-59e8-496b-8287-f5e3bca3db2b/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru.ko-entry_point.cil.out.i[175998,176011] [2023-12-02 14:59:49,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:59:49,192 WARN L675 CHandler]: The function __xchg_wrong_size is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:59:49,193 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:59:49,193 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:59:49,200 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:59:49,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:59:49 WrapperNode [2023-12-02 14:59:49,201 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:59:49,202 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:59:49,202 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:59:49,202 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:59:49,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:59:49" (1/1) ... [2023-12-02 14:59:49,267 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:59:49" (1/1) ... [2023-12-02 14:59:49,393 INFO L138 Inliner]: procedures = 199, calls = 2245, calls flagged for inlining = 73, calls inlined = 51, statements flattened = 3343 [2023-12-02 14:59:49,394 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:59:49,394 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:59:49,395 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:59:49,395 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:59:49,405 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:59:49" (1/1) ... [2023-12-02 14:59:49,405 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:59:49" (1/1) ... [2023-12-02 14:59:49,426 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:59:49" (1/1) ... [2023-12-02 14:59:49,426 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:59:49" (1/1) ... [2023-12-02 14:59:49,500 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:59:49" (1/1) ... [2023-12-02 14:59:49,518 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:59:49" (1/1) ... [2023-12-02 14:59:49,534 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:59:49" (1/1) ... [2023-12-02 14:59:49,545 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:59:49" (1/1) ... [2023-12-02 14:59:49,569 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:59:49,570 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:59:49,570 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:59:49,570 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:59:49,571 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:59:49" (1/1) ... [2023-12-02 14:59:49,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:59:49,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:59:49,603 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:59:49,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:59:49,644 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2023-12-02 14:59:49,644 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2023-12-02 14:59:49,645 INFO L130 BoogieDeclarations]: Found specification of procedure platform_driver_unregister [2023-12-02 14:59:49,645 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_driver_unregister [2023-12-02 14:59:49,645 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2023-12-02 14:59:49,645 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 14:59:49,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 14:59:49,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-02 14:59:49,645 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-02 14:59:49,646 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2023-12-02 14:59:49,646 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2023-12-02 14:59:49,646 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 14:59:49,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 14:59:49,646 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_abituguru_data [2023-12-02 14:59:49,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_abituguru_data [2023-12-02 14:59:49,646 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-12-02 14:59:49,647 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-12-02 14:59:49,647 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 14:59:49,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 14:59:49,647 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2023-12-02 14:59:49,647 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2023-12-02 14:59:49,647 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 14:59:49,647 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 14:59:49,647 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru_resume [2023-12-02 14:59:49,648 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru_resume [2023-12-02 14:59:49,648 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-12-02 14:59:49,648 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-12-02 14:59:49,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 14:59:49,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 14:59:49,648 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-12-02 14:59:49,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-12-02 14:59:49,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:59:49,649 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 14:59:49,649 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 14:59:49,649 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 14:59:49,649 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_abituguru_data [2023-12-02 14:59:49,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_abituguru_data [2023-12-02 14:59:49,649 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-12-02 14:59:49,649 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-12-02 14:59:49,650 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru_send_address [2023-12-02 14:59:49,650 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru_send_address [2023-12-02 14:59:49,650 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2023-12-02 14:59:49,650 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2023-12-02 14:59:49,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 14:59:49,650 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru_wait [2023-12-02 14:59:49,650 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru_wait [2023-12-02 14:59:49,651 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru_remove [2023-12-02 14:59:49,651 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru_remove [2023-12-02 14:59:49,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 14:59:49,651 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_pr_debug [2023-12-02 14:59:49,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_pr_debug [2023-12-02 14:59:49,651 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-12-02 14:59:49,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-12-02 14:59:49,652 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-12-02 14:59:49,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-12-02 14:59:49,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 14:59:49,652 INFO L130 BoogieDeclarations]: Found specification of procedure inb_p [2023-12-02 14:59:49,652 INFO L138 BoogieDeclarations]: Found implementation of procedure inb_p [2023-12-02 14:59:49,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:59:49,652 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru_write [2023-12-02 14:59:49,652 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru_write [2023-12-02 14:59:49,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 14:59:49,653 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru_ready [2023-12-02 14:59:49,653 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru_ready [2023-12-02 14:59:49,653 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-12-02 14:59:49,653 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru_suspend [2023-12-02 14:59:49,653 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru_suspend [2023-12-02 14:59:49,653 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru_read [2023-12-02 14:59:49,653 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru_read [2023-12-02 14:59:49,653 INFO L130 BoogieDeclarations]: Found specification of procedure abituguru_probe [2023-12-02 14:59:49,654 INFO L138 BoogieDeclarations]: Found implementation of procedure abituguru_probe [2023-12-02 14:59:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-12-02 14:59:49,654 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-12-02 14:59:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout [2023-12-02 14:59:49,654 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout [2023-12-02 14:59:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:59:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2023-12-02 14:59:49,654 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2023-12-02 14:59:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:59:49,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:59:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-12-02 14:59:49,655 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-12-02 14:59:49,981 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:59:49,984 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:59:58,390 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 14:59:59,904 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:00:00,435 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:00:00,435 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 15:00:00,437 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:00:00 BoogieIcfgContainer [2023-12-02 15:00:00,437 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:00:00,440 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:00:00,440 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:00:00,443 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:00:00,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:59:47" (1/3) ... [2023-12-02 15:00:00,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c79be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:00:00, skipping insertion in model container [2023-12-02 15:00:00,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:59:49" (2/3) ... [2023-12-02 15:00:00,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c79be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:00:00, skipping insertion in model container [2023-12-02 15:00:00,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:00:00" (3/3) ... [2023-12-02 15:00:00,446 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--hwmon--abituguru.ko-entry_point.cil.out.i [2023-12-02 15:00:00,466 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:00:00,466 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 15:00:00,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:00:00,559 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;@69f1c403, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:00:00,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 15:00:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand has 699 states, 483 states have (on average 1.4699792960662525) internal successors, (710), 497 states have internal predecessors, (710), 181 states have call successors, (181), 34 states have call predecessors, (181), 33 states have return successors, (177), 177 states have call predecessors, (177), 177 states have call successors, (177) [2023-12-02 15:00:00,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 15:00:00,579 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:00,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:00,581 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:00,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:00,586 INFO L85 PathProgramCache]: Analyzing trace with hash 590931126, now seen corresponding path program 1 times [2023-12-02 15:00:00,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:00,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246509916] [2023-12-02 15:00:00,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:00,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:00:01,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:01,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246509916] [2023-12-02 15:00:01,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246509916] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:01,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:01,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:00:01,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137265906] [2023-12-02 15:00:01,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:01,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:00:01,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:01,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:00:01,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:01,287 INFO L87 Difference]: Start difference. First operand has 699 states, 483 states have (on average 1.4699792960662525) internal successors, (710), 497 states have internal predecessors, (710), 181 states have call successors, (181), 34 states have call predecessors, (181), 33 states have return successors, (177), 177 states have call predecessors, (177), 177 states have call successors, (177) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:00:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:03,400 INFO L93 Difference]: Finished difference Result 2036 states and 3128 transitions. [2023-12-02 15:00:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:00:03,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-12-02 15:00:03,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:03,428 INFO L225 Difference]: With dead ends: 2036 [2023-12-02 15:00:03,428 INFO L226 Difference]: Without dead ends: 1326 [2023-12-02 15:00:03,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:03,443 INFO L413 NwaCegarLoop]: 1029 mSDtfsCounter, 1034 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 1931 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:03,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 1931 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 15:00:03,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2023-12-02 15:00:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1322. [2023-12-02 15:00:03,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 922 states have (on average 1.4587852494577007) internal successors, (1345), 934 states have internal predecessors, (1345), 335 states have call successors, (335), 65 states have call predecessors, (335), 64 states have return successors, (330), 330 states have call predecessors, (330), 330 states have call successors, (330) [2023-12-02 15:00:03,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2010 transitions. [2023-12-02 15:00:03,612 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2010 transitions. Word has length 15 [2023-12-02 15:00:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:03,612 INFO L495 AbstractCegarLoop]: Abstraction has 1322 states and 2010 transitions. [2023-12-02 15:00:03,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:00:03,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2010 transitions. [2023-12-02 15:00:03,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 15:00:03,616 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:03,616 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] [2023-12-02 15:00:03,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 15:00:03,617 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:03,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:03,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1194205548, now seen corresponding path program 1 times [2023-12-02 15:00:03,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:03,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602827446] [2023-12-02 15:00:03,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:03,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:00:03,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:03,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602827446] [2023-12-02 15:00:03,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602827446] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:03,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:03,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:00:03,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904800758] [2023-12-02 15:00:03,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:03,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:00:03,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:03,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:00:03,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:03,916 INFO L87 Difference]: Start difference. First operand 1322 states and 2010 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:00:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:05,704 INFO L93 Difference]: Finished difference Result 3816 states and 5809 transitions. [2023-12-02 15:00:05,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:00:05,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-12-02 15:00:05,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:05,728 INFO L225 Difference]: With dead ends: 3816 [2023-12-02 15:00:05,729 INFO L226 Difference]: Without dead ends: 2495 [2023-12-02 15:00:05,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:05,738 INFO L413 NwaCegarLoop]: 968 mSDtfsCounter, 936 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1912 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:05,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 1912 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-12-02 15:00:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2023-12-02 15:00:05,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2482. [2023-12-02 15:00:05,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2482 states, 1733 states have (on average 1.4535487593768033) internal successors, (2519), 1753 states have internal predecessors, (2519), 635 states have call successors, (635), 114 states have call predecessors, (635), 113 states have return successors, (630), 630 states have call predecessors, (630), 630 states have call successors, (630) [2023-12-02 15:00:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3784 transitions. [2023-12-02 15:00:05,911 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3784 transitions. Word has length 22 [2023-12-02 15:00:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:05,912 INFO L495 AbstractCegarLoop]: Abstraction has 2482 states and 3784 transitions. [2023-12-02 15:00:05,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:00:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3784 transitions. [2023-12-02 15:00:05,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 15:00:05,914 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:05,914 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] [2023-12-02 15:00:05,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 15:00:05,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:05,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:05,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2083762587, now seen corresponding path program 1 times [2023-12-02 15:00:05,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:05,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508673110] [2023-12-02 15:00:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:05,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:06,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:00:06,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:06,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508673110] [2023-12-02 15:00:06,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508673110] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:06,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:06,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:00:06,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209867599] [2023-12-02 15:00:06,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:06,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:00:06,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:06,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:00:06,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:06,210 INFO L87 Difference]: Start difference. First operand 2482 states and 3784 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:00:07,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:07,262 INFO L93 Difference]: Finished difference Result 2484 states and 3785 transitions. [2023-12-02 15:00:07,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:00:07,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-12-02 15:00:07,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:07,283 INFO L225 Difference]: With dead ends: 2484 [2023-12-02 15:00:07,284 INFO L226 Difference]: Without dead ends: 2481 [2023-12-02 15:00:07,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:07,287 INFO L413 NwaCegarLoop]: 956 mSDtfsCounter, 1034 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:07,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 956 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 15:00:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2023-12-02 15:00:07,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2023-12-02 15:00:07,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 1733 states have (on average 1.4529717253317946) internal successors, (2518), 1752 states have internal predecessors, (2518), 634 states have call successors, (634), 114 states have call predecessors, (634), 113 states have return successors, (630), 630 states have call predecessors, (630), 630 states have call successors, (630) [2023-12-02 15:00:07,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 3782 transitions. [2023-12-02 15:00:07,470 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 3782 transitions. Word has length 22 [2023-12-02 15:00:07,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:07,471 INFO L495 AbstractCegarLoop]: Abstraction has 2481 states and 3782 transitions. [2023-12-02 15:00:07,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:00:07,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 3782 transitions. [2023-12-02 15:00:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 15:00:07,473 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:07,473 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 15:00:07,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 15:00:07,473 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:07,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:07,474 INFO L85 PathProgramCache]: Analyzing trace with hash 171902195, now seen corresponding path program 1 times [2023-12-02 15:00:07,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:07,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873049325] [2023-12-02 15:00:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:07,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:07,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:00:07,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:07,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873049325] [2023-12-02 15:00:07,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873049325] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:07,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:07,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:00:07,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435543260] [2023-12-02 15:00:07,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:07,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:00:07,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:07,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:00:07,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:07,743 INFO L87 Difference]: Start difference. First operand 2481 states and 3782 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:00:08,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:08,849 INFO L93 Difference]: Finished difference Result 2483 states and 3783 transitions. [2023-12-02 15:00:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:00:08,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-12-02 15:00:08,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:08,869 INFO L225 Difference]: With dead ends: 2483 [2023-12-02 15:00:08,869 INFO L226 Difference]: Without dead ends: 2480 [2023-12-02 15:00:08,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:08,873 INFO L413 NwaCegarLoop]: 954 mSDtfsCounter, 1031 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:08,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 954 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 15:00:08,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2023-12-02 15:00:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 2480. [2023-12-02 15:00:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2480 states, 1733 states have (on average 1.452394691286786) internal successors, (2517), 1751 states have internal predecessors, (2517), 633 states have call successors, (633), 114 states have call predecessors, (633), 113 states have return successors, (630), 630 states have call predecessors, (630), 630 states have call successors, (630) [2023-12-02 15:00:09,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2480 states to 2480 states and 3780 transitions. [2023-12-02 15:00:09,081 INFO L78 Accepts]: Start accepts. Automaton has 2480 states and 3780 transitions. Word has length 23 [2023-12-02 15:00:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:09,082 INFO L495 AbstractCegarLoop]: Abstraction has 2480 states and 3780 transitions. [2023-12-02 15:00:09,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:00:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 2480 states and 3780 transitions. [2023-12-02 15:00:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 15:00:09,083 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:09,084 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 15:00:09,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 15:00:09,084 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:09,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:09,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1033777054, now seen corresponding path program 1 times [2023-12-02 15:00:09,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:09,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074274224] [2023-12-02 15:00:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:09,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:09,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:00:09,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:09,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074274224] [2023-12-02 15:00:09,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074274224] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:09,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:09,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:00:09,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665707403] [2023-12-02 15:00:09,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:09,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:00:09,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:09,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:00:09,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:09,348 INFO L87 Difference]: Start difference. First operand 2480 states and 3780 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:00:11,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:11,369 INFO L93 Difference]: Finished difference Result 7396 states and 11304 transitions. [2023-12-02 15:00:11,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:00:11,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-12-02 15:00:11,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:11,411 INFO L225 Difference]: With dead ends: 7396 [2023-12-02 15:00:11,411 INFO L226 Difference]: Without dead ends: 4909 [2023-12-02 15:00:11,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:11,426 INFO L413 NwaCegarLoop]: 953 mSDtfsCounter, 1012 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:11,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1012 Valid, 1897 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 15:00:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4909 states. [2023-12-02 15:00:11,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4909 to 4902. [2023-12-02 15:00:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4902 states, 3431 states have (on average 1.4546779364616729) internal successors, (4991), 3474 states have internal predecessors, (4991), 1257 states have call successors, (1257), 221 states have call predecessors, (1257), 213 states have return successors, (1247), 1238 states have call predecessors, (1247), 1247 states have call successors, (1247) [2023-12-02 15:00:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4902 states to 4902 states and 7495 transitions. [2023-12-02 15:00:11,807 INFO L78 Accepts]: Start accepts. Automaton has 4902 states and 7495 transitions. Word has length 24 [2023-12-02 15:00:11,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:11,808 INFO L495 AbstractCegarLoop]: Abstraction has 4902 states and 7495 transitions. [2023-12-02 15:00:11,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 15:00:11,808 INFO L276 IsEmpty]: Start isEmpty. Operand 4902 states and 7495 transitions. [2023-12-02 15:00:11,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 15:00:11,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:11,812 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] [2023-12-02 15:00:11,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 15:00:11,813 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:11,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:11,813 INFO L85 PathProgramCache]: Analyzing trace with hash -555961868, now seen corresponding path program 1 times [2023-12-02 15:00:11,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:11,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108606289] [2023-12-02 15:00:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:11,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:00:12,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:12,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108606289] [2023-12-02 15:00:12,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108606289] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:12,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:12,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:00:12,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102570305] [2023-12-02 15:00:12,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:12,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:00:12,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:12,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:00:12,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:00:12,243 INFO L87 Difference]: Start difference. First operand 4902 states and 7495 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 15:00:14,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:14,605 INFO L93 Difference]: Finished difference Result 9818 states and 15005 transitions. [2023-12-02 15:00:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:00:14,606 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 57 [2023-12-02 15:00:14,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:14,702 INFO L225 Difference]: With dead ends: 9818 [2023-12-02 15:00:14,702 INFO L226 Difference]: Without dead ends: 4913 [2023-12-02 15:00:14,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:00:14,724 INFO L413 NwaCegarLoop]: 959 mSDtfsCounter, 12 mSDsluCounter, 1900 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2859 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:14,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2859 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-12-02 15:00:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4913 states. [2023-12-02 15:00:15,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4913 to 4904. [2023-12-02 15:00:15,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4904 states, 3433 states have (on average 1.4532478881444801) internal successors, (4989), 3476 states have internal predecessors, (4989), 1257 states have call successors, (1257), 221 states have call predecessors, (1257), 213 states have return successors, (1247), 1238 states have call predecessors, (1247), 1247 states have call successors, (1247) [2023-12-02 15:00:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4904 states to 4904 states and 7493 transitions. [2023-12-02 15:00:15,061 INFO L78 Accepts]: Start accepts. Automaton has 4904 states and 7493 transitions. Word has length 57 [2023-12-02 15:00:15,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:15,062 INFO L495 AbstractCegarLoop]: Abstraction has 4904 states and 7493 transitions. [2023-12-02 15:00:15,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 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 15:00:15,062 INFO L276 IsEmpty]: Start isEmpty. Operand 4904 states and 7493 transitions. [2023-12-02 15:00:15,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 15:00:15,066 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:15,067 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:15,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 15:00:15,067 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:15,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:15,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1820912526, now seen corresponding path program 1 times [2023-12-02 15:00:15,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:15,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088270486] [2023-12-02 15:00:15,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:15,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 15:00:15,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:15,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088270486] [2023-12-02 15:00:15,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088270486] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:15,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:15,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:00:15,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529976821] [2023-12-02 15:00:15,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:15,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:00:15,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:15,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:00:15,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:00:15,538 INFO L87 Difference]: Start difference. First operand 4904 states and 7493 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 15:00:18,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:18,173 INFO L93 Difference]: Finished difference Result 10312 states and 15803 transitions. [2023-12-02 15:00:18,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:00:18,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2023-12-02 15:00:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:18,218 INFO L225 Difference]: With dead ends: 10312 [2023-12-02 15:00:18,218 INFO L226 Difference]: Without dead ends: 5409 [2023-12-02 15:00:18,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:00:18,242 INFO L413 NwaCegarLoop]: 1070 mSDtfsCounter, 156 mSDsluCounter, 2028 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 3098 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:18,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 3098 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 15:00:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5409 states. [2023-12-02 15:00:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5409 to 4912. [2023-12-02 15:00:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4912 states, 3441 states have (on average 1.4521941296134844) internal successors, (4997), 3484 states have internal predecessors, (4997), 1257 states have call successors, (1257), 221 states have call predecessors, (1257), 213 states have return successors, (1247), 1238 states have call predecessors, (1247), 1247 states have call successors, (1247) [2023-12-02 15:00:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4912 states to 4912 states and 7501 transitions. [2023-12-02 15:00:18,682 INFO L78 Accepts]: Start accepts. Automaton has 4912 states and 7501 transitions. Word has length 76 [2023-12-02 15:00:18,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:18,683 INFO L495 AbstractCegarLoop]: Abstraction has 4912 states and 7501 transitions. [2023-12-02 15:00:18,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-12-02 15:00:18,684 INFO L276 IsEmpty]: Start isEmpty. Operand 4912 states and 7501 transitions. [2023-12-02 15:00:18,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 15:00:18,688 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:18,688 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:18,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 15:00:18,689 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:18,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:18,689 INFO L85 PathProgramCache]: Analyzing trace with hash -218385820, now seen corresponding path program 1 times [2023-12-02 15:00:18,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:18,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610338988] [2023-12-02 15:00:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:18,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 15:00:19,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:19,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610338988] [2023-12-02 15:00:19,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610338988] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:19,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:19,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:00:19,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574974562] [2023-12-02 15:00:19,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:19,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:00:19,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:19,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:00:19,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:19,052 INFO L87 Difference]: Start difference. First operand 4912 states and 7501 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 15:00:20,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:20,516 INFO L93 Difference]: Finished difference Result 9783 states and 15097 transitions. [2023-12-02 15:00:20,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:00:20,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 78 [2023-12-02 15:00:20,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:20,537 INFO L225 Difference]: With dead ends: 9783 [2023-12-02 15:00:20,538 INFO L226 Difference]: Without dead ends: 4872 [2023-12-02 15:00:20,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:20,566 INFO L413 NwaCegarLoop]: 881 mSDtfsCounter, 990 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:20,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [990 Valid, 881 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 15:00:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2023-12-02 15:00:20,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 4872. [2023-12-02 15:00:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4872 states, 3417 states have (on average 1.37928007023705) internal successors, (4713), 3460 states have internal predecessors, (4713), 1241 states have call successors, (1241), 221 states have call predecessors, (1241), 213 states have return successors, (1231), 1222 states have call predecessors, (1231), 1231 states have call successors, (1231) [2023-12-02 15:00:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 7185 transitions. [2023-12-02 15:00:20,911 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 7185 transitions. Word has length 78 [2023-12-02 15:00:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:20,911 INFO L495 AbstractCegarLoop]: Abstraction has 4872 states and 7185 transitions. [2023-12-02 15:00:20,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-12-02 15:00:20,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 7185 transitions. [2023-12-02 15:00:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-12-02 15:00:20,915 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:20,916 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:20,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 15:00:20,916 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:20,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:20,917 INFO L85 PathProgramCache]: Analyzing trace with hash 170231947, now seen corresponding path program 1 times [2023-12-02 15:00:20,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:20,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914384328] [2023-12-02 15:00:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:20,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 15:00:21,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:21,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914384328] [2023-12-02 15:00:21,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914384328] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:21,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:21,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:00:21,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754879528] [2023-12-02 15:00:21,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:21,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:00:21,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:21,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:00:21,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:21,192 INFO L87 Difference]: Start difference. First operand 4872 states and 7185 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 15:00:24,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:24,370 INFO L93 Difference]: Finished difference Result 14588 states and 21515 transitions. [2023-12-02 15:00:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:00:24,370 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 83 [2023-12-02 15:00:24,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:24,423 INFO L225 Difference]: With dead ends: 14588 [2023-12-02 15:00:24,423 INFO L226 Difference]: Without dead ends: 9717 [2023-12-02 15:00:24,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:24,448 INFO L413 NwaCegarLoop]: 1448 mSDtfsCounter, 988 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:24,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 2356 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-02 15:00:24,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9717 states. [2023-12-02 15:00:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9717 to 9700. [2023-12-02 15:00:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9700 states, 6801 states have (on average 1.37876782826055) internal successors, (9377), 6886 states have internal predecessors, (9377), 2473 states have call successors, (2473), 439 states have call predecessors, (2473), 425 states have return successors, (2457), 2438 states have call predecessors, (2457), 2457 states have call successors, (2457) [2023-12-02 15:00:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9700 states to 9700 states and 14307 transitions. [2023-12-02 15:00:25,153 INFO L78 Accepts]: Start accepts. Automaton has 9700 states and 14307 transitions. Word has length 83 [2023-12-02 15:00:25,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:25,154 INFO L495 AbstractCegarLoop]: Abstraction has 9700 states and 14307 transitions. [2023-12-02 15:00:25,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 15:00:25,154 INFO L276 IsEmpty]: Start isEmpty. Operand 9700 states and 14307 transitions. [2023-12-02 15:00:25,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-02 15:00:25,160 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:25,160 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:25,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 15:00:25,160 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:25,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:25,161 INFO L85 PathProgramCache]: Analyzing trace with hash -199978876, now seen corresponding path program 1 times [2023-12-02 15:00:25,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:25,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029456510] [2023-12-02 15:00:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:25,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:25,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:25,523 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 15:00:25,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:25,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029456510] [2023-12-02 15:00:25,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029456510] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:25,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:25,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:00:25,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796837988] [2023-12-02 15:00:25,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:25,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:00:25,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:25,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:00:25,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:25,525 INFO L87 Difference]: Start difference. First operand 9700 states and 14307 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 15:00:28,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:28,800 INFO L93 Difference]: Finished difference Result 24232 states and 35823 transitions. [2023-12-02 15:00:28,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:00:28,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 85 [2023-12-02 15:00:28,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:28,859 INFO L225 Difference]: With dead ends: 24232 [2023-12-02 15:00:28,859 INFO L226 Difference]: Without dead ends: 14533 [2023-12-02 15:00:28,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:28,886 INFO L413 NwaCegarLoop]: 1516 mSDtfsCounter, 925 mSDsluCounter, 898 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 2414 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:28,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [925 Valid, 2414 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 15:00:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14533 states. [2023-12-02 15:00:29,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14533 to 14520. [2023-12-02 15:00:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14520 states, 10243 states have (on average 1.3819193595626282) internal successors, (14155), 10360 states have internal predecessors, (14155), 3655 states have call successors, (3655), 635 states have call predecessors, (3655), 621 states have return successors, (3639), 3620 states have call predecessors, (3639), 3639 states have call successors, (3639) [2023-12-02 15:00:29,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14520 states to 14520 states and 21449 transitions. [2023-12-02 15:00:29,642 INFO L78 Accepts]: Start accepts. Automaton has 14520 states and 21449 transitions. Word has length 85 [2023-12-02 15:00:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:29,643 INFO L495 AbstractCegarLoop]: Abstraction has 14520 states and 21449 transitions. [2023-12-02 15:00:29,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 15:00:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 14520 states and 21449 transitions. [2023-12-02 15:00:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-12-02 15:00:29,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:29,650 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:29,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 15:00:29,650 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:29,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:29,651 INFO L85 PathProgramCache]: Analyzing trace with hash -869750106, now seen corresponding path program 1 times [2023-12-02 15:00:29,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:29,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388112983] [2023-12-02 15:00:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:29,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:29,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 15:00:30,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:30,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388112983] [2023-12-02 15:00:30,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388112983] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:30,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:30,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 15:00:30,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639434085] [2023-12-02 15:00:30,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:30,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:00:30,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:30,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:00:30,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:00:30,039 INFO L87 Difference]: Start difference. First operand 14520 states and 21449 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 15:00:31,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:00:33,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:33,487 INFO L93 Difference]: Finished difference Result 29058 states and 42918 transitions. [2023-12-02 15:00:33,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:00:33,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 103 [2023-12-02 15:00:33,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:33,552 INFO L225 Difference]: With dead ends: 29058 [2023-12-02 15:00:33,552 INFO L226 Difference]: Without dead ends: 14533 [2023-12-02 15:00:33,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:00:33,592 INFO L413 NwaCegarLoop]: 920 mSDtfsCounter, 12 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2740 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:33,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2740 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-02 15:00:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14533 states. [2023-12-02 15:00:34,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14533 to 14514. [2023-12-02 15:00:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14514 states, 10237 states have (on average 1.3818501514115464) internal successors, (14146), 10354 states have internal predecessors, (14146), 3655 states have call successors, (3655), 635 states have call predecessors, (3655), 621 states have return successors, (3639), 3620 states have call predecessors, (3639), 3639 states have call successors, (3639) [2023-12-02 15:00:34,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14514 states to 14514 states and 21440 transitions. [2023-12-02 15:00:34,522 INFO L78 Accepts]: Start accepts. Automaton has 14514 states and 21440 transitions. Word has length 103 [2023-12-02 15:00:34,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:34,523 INFO L495 AbstractCegarLoop]: Abstraction has 14514 states and 21440 transitions. [2023-12-02 15:00:34,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 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 15:00:34,523 INFO L276 IsEmpty]: Start isEmpty. Operand 14514 states and 21440 transitions. [2023-12-02 15:00:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 15:00:34,532 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:34,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2023-12-02 15:00:34,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 15:00:34,532 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:34,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:34,533 INFO L85 PathProgramCache]: Analyzing trace with hash 126127946, now seen corresponding path program 1 times [2023-12-02 15:00:34,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:34,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123878426] [2023-12-02 15:00:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:34,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:35,060 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-12-02 15:00:35,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:35,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123878426] [2023-12-02 15:00:35,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123878426] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:35,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:35,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:00:35,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551747242] [2023-12-02 15:00:35,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:35,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:00:35,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:35,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:00:35,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:35,063 INFO L87 Difference]: Start difference. First operand 14514 states and 21440 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 15:00:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:36,054 INFO L93 Difference]: Finished difference Result 14531 states and 21456 transitions. [2023-12-02 15:00:36,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:00:36,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2023-12-02 15:00:36,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:36,084 INFO L225 Difference]: With dead ends: 14531 [2023-12-02 15:00:36,085 INFO L226 Difference]: Without dead ends: 7270 [2023-12-02 15:00:36,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:00:36,107 INFO L413 NwaCegarLoop]: 908 mSDtfsCounter, 992 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:36,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [992 Valid, 908 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 15:00:36,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7270 states. [2023-12-02 15:00:36,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7270 to 7270. [2023-12-02 15:00:36,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7270 states, 5131 states have (on average 1.3806275579809004) internal successors, (7084), 5190 states have internal predecessors, (7084), 1827 states have call successors, (1827), 319 states have call predecessors, (1827), 311 states have return successors, (1817), 1808 states have call predecessors, (1817), 1817 states have call successors, (1817) [2023-12-02 15:00:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7270 states to 7270 states and 10728 transitions. [2023-12-02 15:00:36,497 INFO L78 Accepts]: Start accepts. Automaton has 7270 states and 10728 transitions. Word has length 109 [2023-12-02 15:00:36,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:36,498 INFO L495 AbstractCegarLoop]: Abstraction has 7270 states and 10728 transitions. [2023-12-02 15:00:36,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-02 15:00:36,498 INFO L276 IsEmpty]: Start isEmpty. Operand 7270 states and 10728 transitions. [2023-12-02 15:00:36,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-12-02 15:00:36,503 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:36,503 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:36,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 15:00:36,504 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:36,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:36,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1983709989, now seen corresponding path program 1 times [2023-12-02 15:00:36,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:36,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736309014] [2023-12-02 15:00:36,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:36,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-02 15:00:37,519 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:37,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736309014] [2023-12-02 15:00:37,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736309014] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:37,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:37,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:00:37,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286345042] [2023-12-02 15:00:37,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:37,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:00:37,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:37,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:00:37,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:00:37,522 INFO L87 Difference]: Start difference. First operand 7270 states and 10728 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 15:00:38,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:00:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:41,098 INFO L93 Difference]: Finished difference Result 14582 states and 21537 transitions. [2023-12-02 15:00:41,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:00:41,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 115 [2023-12-02 15:00:41,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:41,132 INFO L225 Difference]: With dead ends: 14582 [2023-12-02 15:00:41,132 INFO L226 Difference]: Without dead ends: 7304 [2023-12-02 15:00:41,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:00:41,156 INFO L413 NwaCegarLoop]: 910 mSDtfsCounter, 1 mSDsluCounter, 2723 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3633 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:41,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 3633 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-02 15:00:41,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7304 states. [2023-12-02 15:00:41,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7304 to 7285. [2023-12-02 15:00:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7285 states, 5140 states have (on average 1.3799610894941634) internal successors, (7093), 5204 states have internal predecessors, (7093), 1827 states have call successors, (1827), 319 states have call predecessors, (1827), 317 states have return successors, (1844), 1809 states have call predecessors, (1844), 1817 states have call successors, (1844) [2023-12-02 15:00:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7285 states to 7285 states and 10764 transitions. [2023-12-02 15:00:41,613 INFO L78 Accepts]: Start accepts. Automaton has 7285 states and 10764 transitions. Word has length 115 [2023-12-02 15:00:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:41,613 INFO L495 AbstractCegarLoop]: Abstraction has 7285 states and 10764 transitions. [2023-12-02 15:00:41,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-02 15:00:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 7285 states and 10764 transitions. [2023-12-02 15:00:41,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 15:00:41,619 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:41,620 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 15:00:41,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 15:00:41,620 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:41,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:41,621 INFO L85 PathProgramCache]: Analyzing trace with hash -392669418, now seen corresponding path program 1 times [2023-12-02 15:00:41,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:41,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783962872] [2023-12-02 15:00:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:41,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-02 15:00:42,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:42,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783962872] [2023-12-02 15:00:42,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783962872] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:00:42,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122837323] [2023-12-02 15:00:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:42,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:42,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:00:42,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:00:42,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 15:00:43,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:43,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 3368 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 15:00:43,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:00:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 15:00:43,168 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:00:43,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122837323] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:43,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 15:00:43,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-12-02 15:00:43,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450357893] [2023-12-02 15:00:43,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:43,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:00:43,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:43,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:00:43,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:00:43,171 INFO L87 Difference]: Start difference. First operand 7285 states and 10764 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 15:00:49,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:49,242 INFO L93 Difference]: Finished difference Result 15615 states and 22930 transitions. [2023-12-02 15:00:49,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:00:49,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 124 [2023-12-02 15:00:49,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:49,268 INFO L225 Difference]: With dead ends: 15615 [2023-12-02 15:00:49,268 INFO L226 Difference]: Without dead ends: 8240 [2023-12-02 15:00:49,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:00:49,286 INFO L413 NwaCegarLoop]: 1802 mSDtfsCounter, 1002 mSDsluCounter, 4476 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 6278 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:49,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1005 Valid, 6278 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-12-02 15:00:49,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8240 states. [2023-12-02 15:00:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8240 to 7549. [2023-12-02 15:00:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7549 states, 5294 states have (on average 1.3734416320362675) internal successors, (7271), 5374 states have internal predecessors, (7271), 1886 states have call successors, (1886), 365 states have call predecessors, (1886), 368 states have return successors, (1911), 1857 states have call predecessors, (1911), 1876 states have call successors, (1911) [2023-12-02 15:00:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7549 states to 7549 states and 11068 transitions. [2023-12-02 15:00:49,691 INFO L78 Accepts]: Start accepts. Automaton has 7549 states and 11068 transitions. Word has length 124 [2023-12-02 15:00:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:49,692 INFO L495 AbstractCegarLoop]: Abstraction has 7549 states and 11068 transitions. [2023-12-02 15:00:49,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-12-02 15:00:49,692 INFO L276 IsEmpty]: Start isEmpty. Operand 7549 states and 11068 transitions. [2023-12-02 15:00:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-02 15:00:49,698 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:49,698 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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] [2023-12-02 15:00:49,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 15:00:49,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:49,899 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:49,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:49,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1790949396, now seen corresponding path program 1 times [2023-12-02 15:00:49,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:49,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491712483] [2023-12-02 15:00:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:49,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 15:00:50,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:50,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491712483] [2023-12-02 15:00:50,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491712483] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:00:50,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:00:50,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:00:50,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312265684] [2023-12-02 15:00:50,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:50,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 15:00:50,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:50,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 15:00:50,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:00:50,748 INFO L87 Difference]: Start difference. First operand 7549 states and 11068 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 15:00:54,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:54,219 INFO L93 Difference]: Finished difference Result 15739 states and 23065 transitions. [2023-12-02 15:00:54,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:00:54,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 132 [2023-12-02 15:00:54,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:54,247 INFO L225 Difference]: With dead ends: 15739 [2023-12-02 15:00:54,247 INFO L226 Difference]: Without dead ends: 8180 [2023-12-02 15:00:54,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:00:54,265 INFO L413 NwaCegarLoop]: 919 mSDtfsCounter, 867 mSDsluCounter, 2745 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 3664 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:54,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [871 Valid, 3664 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 15:00:54,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8180 states. [2023-12-02 15:00:54,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8180 to 7550. [2023-12-02 15:00:54,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7550 states, 5295 states have (on average 1.372993389990557) internal successors, (7270), 5373 states have internal predecessors, (7270), 1887 states have call successors, (1887), 366 states have call predecessors, (1887), 367 states have return successors, (1907), 1858 states have call predecessors, (1907), 1877 states have call successors, (1907) [2023-12-02 15:00:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7550 states to 7550 states and 11064 transitions. [2023-12-02 15:00:54,619 INFO L78 Accepts]: Start accepts. Automaton has 7550 states and 11064 transitions. Word has length 132 [2023-12-02 15:00:54,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:54,620 INFO L495 AbstractCegarLoop]: Abstraction has 7550 states and 11064 transitions. [2023-12-02 15:00:54,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2023-12-02 15:00:54,620 INFO L276 IsEmpty]: Start isEmpty. Operand 7550 states and 11064 transitions. [2023-12-02 15:00:54,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-12-02 15:00:54,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:54,624 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:54,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 15:00:54,624 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:54,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:54,624 INFO L85 PathProgramCache]: Analyzing trace with hash -303640431, now seen corresponding path program 1 times [2023-12-02 15:00:54,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:54,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852795466] [2023-12-02 15:00:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:54,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-02 15:00:55,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:00:55,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852795466] [2023-12-02 15:00:55,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852795466] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:00:55,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859103940] [2023-12-02 15:00:55,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:55,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:00:55,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:00:55,321 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:00:55,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 15:00:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:00:56,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 3527 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:00:56,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:00:56,156 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 15:00:56,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:00:56,307 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-12-02 15:00:56,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859103940] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 15:00:56,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:00:56,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 5 [2023-12-02 15:00:56,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301030545] [2023-12-02 15:00:56,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:00:56,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:00:56,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:00:56,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:00:56,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:00:56,310 INFO L87 Difference]: Start difference. First operand 7550 states and 11064 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 15:00:58,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:00:58,684 INFO L93 Difference]: Finished difference Result 20208 states and 29631 transitions. [2023-12-02 15:00:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:00:58,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 147 [2023-12-02 15:00:58,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:00:58,727 INFO L225 Difference]: With dead ends: 20208 [2023-12-02 15:00:58,727 INFO L226 Difference]: Without dead ends: 12659 [2023-12-02 15:00:58,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:00:58,747 INFO L413 NwaCegarLoop]: 897 mSDtfsCounter, 957 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 1768 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:00:58,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 1768 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 15:00:58,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12659 states. [2023-12-02 15:00:59,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12659 to 12614. [2023-12-02 15:00:59,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 8877 states have (on average 1.3774923960797567) internal successors, (12228), 9001 states have internal predecessors, (12228), 3125 states have call successors, (3125), 606 states have call predecessors, (3125), 611 states have return successors, (3165), 3086 states have call predecessors, (3165), 3115 states have call successors, (3165) [2023-12-02 15:00:59,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 18518 transitions. [2023-12-02 15:00:59,373 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 18518 transitions. Word has length 147 [2023-12-02 15:00:59,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:00:59,374 INFO L495 AbstractCegarLoop]: Abstraction has 12614 states and 18518 transitions. [2023-12-02 15:00:59,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 15:00:59,374 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 18518 transitions. [2023-12-02 15:00:59,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-02 15:00:59,378 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:00:59,378 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:00:59,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 15:00:59,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 15:00:59,579 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:00:59,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:00:59,579 INFO L85 PathProgramCache]: Analyzing trace with hash 23770042, now seen corresponding path program 1 times [2023-12-02 15:00:59,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:00:59,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537521625] [2023-12-02 15:00:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:00:59,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:00:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:01:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-02 15:01:00,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:01:00,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537521625] [2023-12-02 15:01:00,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537521625] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:01:00,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568951137] [2023-12-02 15:01:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:01:00,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:01:00,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:01:00,093 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:01:00,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 15:01:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:01:00,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 3525 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 15:01:00,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:01:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 15:01:01,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:01:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-02 15:01:01,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568951137] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 15:01:01,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:01:01,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 7] total 11 [2023-12-02 15:01:01,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155486604] [2023-12-02 15:01:01,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:01:01,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:01:01,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:01:01,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:01:01,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:01:01,354 INFO L87 Difference]: Start difference. First operand 12614 states and 18518 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 15:01:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:01:06,642 INFO L93 Difference]: Finished difference Result 36320 states and 53403 transitions. [2023-12-02 15:01:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:01:06,643 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 146 [2023-12-02 15:01:06,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:01:06,725 INFO L225 Difference]: With dead ends: 36320 [2023-12-02 15:01:06,725 INFO L226 Difference]: Without dead ends: 23707 [2023-12-02 15:01:06,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=69, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:01:06,761 INFO L413 NwaCegarLoop]: 896 mSDtfsCounter, 1152 mSDsluCounter, 3338 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 4234 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:01:06,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1183 Valid, 4234 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-12-02 15:01:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23707 states. [2023-12-02 15:01:07,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23707 to 22700. [2023-12-02 15:01:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22700 states, 16017 states have (on average 1.3806580508210027) internal successors, (22114), 16233 states have internal predecessors, (22114), 5589 states have call successors, (5589), 1078 states have call predecessors, (5589), 1093 states have return successors, (5669), 5532 states have call predecessors, (5669), 5579 states have call successors, (5669) [2023-12-02 15:01:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22700 states to 22700 states and 33372 transitions. [2023-12-02 15:01:08,034 INFO L78 Accepts]: Start accepts. Automaton has 22700 states and 33372 transitions. Word has length 146 [2023-12-02 15:01:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:01:08,034 INFO L495 AbstractCegarLoop]: Abstraction has 22700 states and 33372 transitions. [2023-12-02 15:01:08,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 15:01:08,035 INFO L276 IsEmpty]: Start isEmpty. Operand 22700 states and 33372 transitions. [2023-12-02 15:01:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-12-02 15:01:08,039 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:01:08,040 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:01:08,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 15:01:08,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 15:01:08,241 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:01:08,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:01:08,241 INFO L85 PathProgramCache]: Analyzing trace with hash 569096883, now seen corresponding path program 1 times [2023-12-02 15:01:08,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:01:08,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860217407] [2023-12-02 15:01:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:01:08,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:01:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:01:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-02 15:01:08,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:01:08,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860217407] [2023-12-02 15:01:08,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860217407] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:01:08,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263344884] [2023-12-02 15:01:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:01:08,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:01:08,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:01:08,710 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:01:08,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 15:01:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:01:09,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 3535 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:01:09,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:01:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 15:01:09,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:01:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-02 15:01:09,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263344884] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 15:01:09,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 15:01:09,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 5 [2023-12-02 15:01:09,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633491880] [2023-12-02 15:01:09,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:01:09,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:01:09,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 15:01:09,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:01:09,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:01:09,672 INFO L87 Difference]: Start difference. First operand 22700 states and 33372 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 15:01:12,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:01:12,526 INFO L93 Difference]: Finished difference Result 65544 states and 96417 transitions. [2023-12-02 15:01:12,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:01:12,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 151 [2023-12-02 15:01:12,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:01:12,655 INFO L225 Difference]: With dead ends: 65544 [2023-12-02 15:01:12,655 INFO L226 Difference]: Without dead ends: 42845 [2023-12-02 15:01:12,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:01:12,699 INFO L413 NwaCegarLoop]: 897 mSDtfsCounter, 957 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 1768 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 15:01:12,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [957 Valid, 1768 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 15:01:12,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42845 states. [2023-12-02 15:01:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42845 to 42788. [2023-12-02 15:01:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42788 states, 30249 states have (on average 1.3827233958147376) internal successors, (41826), 30649 states have internal predecessors, (41826), 10493 states have call successors, (10493), 2006 states have call predecessors, (10493), 2045 states have return successors, (10653), 10404 states have call predecessors, (10653), 10483 states have call successors, (10653) [2023-12-02 15:01:15,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42788 states to 42788 states and 62972 transitions. [2023-12-02 15:01:15,045 INFO L78 Accepts]: Start accepts. Automaton has 42788 states and 62972 transitions. Word has length 151 [2023-12-02 15:01:15,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:01:15,045 INFO L495 AbstractCegarLoop]: Abstraction has 42788 states and 62972 transitions. [2023-12-02 15:01:15,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-12-02 15:01:15,046 INFO L276 IsEmpty]: Start isEmpty. Operand 42788 states and 62972 transitions. [2023-12-02 15:01:15,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-12-02 15:01:15,053 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:01:15,054 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:01:15,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-02 15:01:15,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 15:01:15,254 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 15:01:15,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:01:15,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1056378202, now seen corresponding path program 1 times [2023-12-02 15:01:15,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 15:01:15,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934273359] [2023-12-02 15:01:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:01:15,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 15:01:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:01:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-02 15:01:16,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 15:01:16,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934273359] [2023-12-02 15:01:16,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934273359] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 15:01:16,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9873040] [2023-12-02 15:01:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:01:16,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:01:16,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:01:16,201 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:01:16,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3d2be94-59e8-496b-8287-f5e3bca3db2b/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 15:01:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:01:16,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 3553 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 15:01:16,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:01:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 15:01:17,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:01:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2023-12-02 15:01:17,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9873040] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:01:17,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1061073454] [2023-12-02 15:01:17,599 INFO L159 IcfgInterpreter]: Started Sifa with 94 locations of interest [2023-12-02 15:01:17,599 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 15:01:17,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 15:01:17,606 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 15:01:17,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs