./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-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8954b1975c9ef274050a4ed05b880cddaf4747278343623028f38a4ef8e6ca73 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:13:46,145 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:13:46,256 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:13:46,266 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:13:46,267 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:13:46,303 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:13:46,304 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:13:46,304 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:13:46,305 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:13:46,310 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:13:46,311 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:13:46,312 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:13:46,312 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:13:46,314 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:13:46,314 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:13:46,315 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:13:46,315 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:13:46,315 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:13:46,317 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:13:46,318 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:13:46,318 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:13:46,319 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:13:46,320 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:13:46,320 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:13:46,321 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:13:46,321 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:13:46,321 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:13:46,322 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:13:46,322 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:13:46,323 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:13:46,324 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:13:46,324 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:13:46,325 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:13:46,325 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:13:46,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:13:46,326 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:13:46,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:13:46,326 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:13:46,326 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:13:46,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:13:46,327 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:13:46,327 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:13:46,328 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:13:46,328 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:13:46,329 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_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8954b1975c9ef274050a4ed05b880cddaf4747278343623028f38a4ef8e6ca73 [2023-11-23 21:13:46,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:13:46,658 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:13:46,660 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:13:46,661 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:13:46,662 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:13:46,664 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2023-11-23 21:13:49,922 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:13:50,430 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:13:50,430 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2023-11-23 21:13:50,471 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/data/d062dea16/89dadaa953c14253aa544543546c124d/FLAG6c729e824 [2023-11-23 21:13:50,491 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/data/d062dea16/89dadaa953c14253aa544543546c124d [2023-11-23 21:13:50,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:13:50,499 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:13:50,503 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:13:50,504 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:13:50,510 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:13:50,511 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:50" (1/1) ... [2023-11-23 21:13:50,514 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c4655b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:50, skipping insertion in model container [2023-11-23 21:13:50,514 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:50" (1/1) ... [2023-11-23 21:13:50,624 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:13:51,648 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_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i[115866,115879] [2023-11-23 21:13:51,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:13:51,729 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:13:51,850 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [3196] [2023-11-23 21:13:51,852 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [3204-3205] [2023-11-23 21:13:51,858 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [3242] [2023-11-23 21:13:51,859 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [3250] [2023-11-23 21:13:51,906 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __get_user_%P3": "=a" (__ret_gu), "=r" (__val_gu): "0" (data + i), "i" (1UL)); [3602-3603] [2023-11-23 21:13:51,919 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu): "0" (__pu_val), "c" (uarg.i): "ebx"); [3692] [2023-11-23 21:13:51,920 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu): "0" (__pu_val), "c" (uarg.i): "ebx"); [3695] [2023-11-23 21:13:51,920 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu): "0" (__pu_val), "c" (uarg.i): "ebx"); [3698] [2023-11-23 21:13:51,921 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu): "0" (__pu_val), "c" (uarg.i): "ebx"); [3701] [2023-11-23 21:13:51,921 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu): "0" (__pu_val), "c" (uarg.i): "ebx"); [3704] [2023-11-23 21:13:51,923 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (uarg.i): "ebx"); [3715-3716] [2023-11-23 21:13:51,927 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (uarg.i): "ebx"); [3719-3720] [2023-11-23 21:13:51,927 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (uarg.i): "ebx"); [3723-3724] [2023-11-23 21:13:51,928 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (uarg.i): "ebx"); [3727-3728] [2023-11-23 21:13:51,928 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu___0): "0" (__pu_val___0), "c" (uarg.i): "ebx"); [3731-3732] [2023-11-23 21:13:51,930 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __get_user_%P3": "=a" (__ret_gu), "=r" (__val_gu): "0" (uarg.i), "i" (4UL)); [3741-3742] [2023-11-23 21:13:51,934 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __get_user_%P3": "=a" (__ret_gu___0), "=r" (__val_gu___0): "0" (uarg.i), "i" (4UL)); [3765-3766] [2023-11-23 21:13:51,938 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_1": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (uarg.i): "ebx"); [3786-3787] [2023-11-23 21:13:51,938 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_2": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (uarg.i): "ebx"); [3790-3791] [2023-11-23 21:13:51,939 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_4": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (uarg.i): "ebx"); [3794-3795] [2023-11-23 21:13:51,939 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_8": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (uarg.i): "ebx"); [3798-3799] [2023-11-23 21:13:51,940 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __put_user_X": "=a" (__ret_pu___1): "0" (__pu_val___1), "c" (uarg.i): "ebx"); [3802-3803] [2023-11-23 21:13:51,967 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_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i[115866,115879] [2023-11-23 21:13:51,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:13:52,045 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:13:52,046 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:52 WrapperNode [2023-11-23 21:13:52,047 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:13:52,048 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:13:52,049 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:13:52,049 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:13:52,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:52" (1/1) ... [2023-11-23 21:13:52,114 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:52" (1/1) ... [2023-11-23 21:13:52,226 INFO L138 Inliner]: procedures = 99, calls = 323, calls flagged for inlining = 40, calls inlined = 37, statements flattened = 930 [2023-11-23 21:13:52,228 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:13:52,230 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:13:52,230 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:13:52,230 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:13:52,241 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:52" (1/1) ... [2023-11-23 21:13:52,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:52" (1/1) ... [2023-11-23 21:13:52,268 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:52" (1/1) ... [2023-11-23 21:13:52,276 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:52" (1/1) ... [2023-11-23 21:13:52,333 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:52" (1/1) ... [2023-11-23 21:13:52,342 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:52" (1/1) ... [2023-11-23 21:13:52,349 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:52" (1/1) ... [2023-11-23 21:13:52,356 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:52" (1/1) ... [2023-11-23 21:13:52,368 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:13:52,369 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:13:52,369 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:13:52,369 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:13:52,370 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:52" (1/1) ... [2023-11-23 21:13:52,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:13:52,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:52,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:13:52,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:13:52,481 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2023-11-23 21:13:52,481 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2023-11-23 21:13:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:13:52,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:13:52,482 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:13:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-23 21:13:52,483 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-23 21:13:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable_sw_wd_trg [2023-11-23 21:13:52,483 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable_sw_wd_trg [2023-11-23 21:13:52,483 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2023-11-23 21:13:52,484 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2023-11-23 21:13:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_sw_wd_trg [2023-11-23 21:13:52,484 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_sw_wd_trg [2023-11-23 21:13:52,484 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2023-11-23 21:13:52,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2023-11-23 21:13:52,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:13:52,485 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:13:52,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:13:52,485 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_write [2023-11-23 21:13:52,485 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_write [2023-11-23 21:13:52,485 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable [2023-11-23 21:13:52,486 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable [2023-11-23 21:13:52,486 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_disable_sw_wd_tren [2023-11-23 21:13:52,486 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_disable_sw_wd_tren [2023-11-23 21:13:52,486 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-23 21:13:52,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-23 21:13:52,486 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:13:52,487 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:13:52,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:13:52,487 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-23 21:13:52,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-23 21:13:52,487 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_refresh [2023-11-23 21:13:52,487 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_refresh [2023-11-23 21:13:52,488 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_sw_wd_tren [2023-11-23 21:13:52,488 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_sw_wd_tren [2023-11-23 21:13:52,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:13:52,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:13:52,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:13:52,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:13:52,489 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable [2023-11-23 21:13:52,489 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable [2023-11-23 21:13:52,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:13:52,489 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_enable_wden [2023-11-23 21:13:52,489 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_enable_wden [2023-11-23 21:13:52,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:13:52,490 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:13:52,490 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:13:52,490 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2023-11-23 21:13:52,490 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2023-11-23 21:13:52,491 INFO L130 BoogieDeclarations]: Found specification of procedure outb_p [2023-11-23 21:13:52,491 INFO L138 BoogieDeclarations]: Found implementation of procedure outb_p [2023-11-23 21:13:52,491 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-11-23 21:13:52,491 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-11-23 21:13:52,491 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-11-23 21:13:52,492 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-11-23 21:13:52,492 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-23 21:13:52,492 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-23 21:13:52,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:13:52,536 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2023-11-23 21:13:52,537 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2023-11-23 21:13:52,537 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_swc_bank3 [2023-11-23 21:13:52,537 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_swc_bank3 [2023-11-23 21:13:52,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:13:52,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:13:52,537 INFO L130 BoogieDeclarations]: Found specification of procedure pc87413_programm_wdto [2023-11-23 21:13:52,537 INFO L138 BoogieDeclarations]: Found implementation of procedure pc87413_programm_wdto [2023-11-23 21:13:52,850 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:13:52,853 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:13:52,984 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:13:55,963 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:13:56,282 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:13:56,283 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:13:56,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:56 BoogieIcfgContainer [2023-11-23 21:13:56,285 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:13:56,288 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:13:56,289 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:13:56,292 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:13:56,293 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:13:50" (1/3) ... [2023-11-23 21:13:56,293 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c6ec73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:56, skipping insertion in model container [2023-11-23 21:13:56,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:52" (2/3) ... [2023-11-23 21:13:56,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22c6ec73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:56, skipping insertion in model container [2023-11-23 21:13:56,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:56" (3/3) ... [2023-11-23 21:13:56,296 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--pc87413_wdt.ko-entry_point.cil.out.i [2023-11-23 21:13:56,317 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:13:56,318 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:13:56,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:13:56,406 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;@20453032, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:13:56,406 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:13:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 305 states, 169 states have (on average 1.3372781065088757) internal successors, (226), 179 states have internal predecessors, (226), 108 states have call successors, (108), 27 states have call predecessors, (108), 26 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-23 21:13:56,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-23 21:13:56,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:56,433 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:56,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:56,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:56,439 INFO L85 PathProgramCache]: Analyzing trace with hash 574320973, now seen corresponding path program 1 times [2023-11-23 21:13:56,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:56,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991815190] [2023-11-23 21:13:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:56,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-23 21:13:57,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:57,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991815190] [2023-11-23 21:13:57,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991815190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:57,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:57,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:13:57,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901566045] [2023-11-23 21:13:57,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:57,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:57,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:57,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:57,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:57,199 INFO L87 Difference]: Start difference. First operand has 305 states, 169 states have (on average 1.3372781065088757) internal successors, (226), 179 states have internal predecessors, (226), 108 states have call successors, (108), 27 states have call predecessors, (108), 26 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-23 21:13:57,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:57,667 INFO L93 Difference]: Finished difference Result 857 states and 1236 transitions. [2023-11-23 21:13:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:57,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 103 [2023-11-23 21:13:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:57,703 INFO L225 Difference]: With dead ends: 857 [2023-11-23 21:13:57,703 INFO L226 Difference]: Without dead ends: 550 [2023-11-23 21:13:57,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:57,719 INFO L413 NwaCegarLoop]: 430 mSDtfsCounter, 390 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:57,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 787 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:13:57,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-11-23 21:13:57,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 550. [2023-11-23 21:13:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 311 states have (on average 1.3086816720257235) internal successors, (407), 319 states have internal predecessors, (407), 189 states have call successors, (189), 50 states have call predecessors, (189), 49 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2023-11-23 21:13:57,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 784 transitions. [2023-11-23 21:13:57,903 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 784 transitions. Word has length 103 [2023-11-23 21:13:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:57,905 INFO L495 AbstractCegarLoop]: Abstraction has 550 states and 784 transitions. [2023-11-23 21:13:57,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-23 21:13:57,905 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 784 transitions. [2023-11-23 21:13:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-23 21:13:57,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:57,928 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:57,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:13:57,934 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:57,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:57,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1203307982, now seen corresponding path program 1 times [2023-11-23 21:13:57,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:57,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068725428] [2023-11-23 21:13:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:57,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:58,405 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2023-11-23 21:13:58,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:58,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068725428] [2023-11-23 21:13:58,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068725428] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:58,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:58,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:13:58,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909012826] [2023-11-23 21:13:58,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:58,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:58,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:58,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:58,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:58,412 INFO L87 Difference]: Start difference. First operand 550 states and 784 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-11-23 21:14:00,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:14:00,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:00,714 INFO L93 Difference]: Finished difference Result 1276 states and 1780 transitions. [2023-11-23 21:14:00,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:14:00,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 201 [2023-11-23 21:14:00,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:00,722 INFO L225 Difference]: With dead ends: 1276 [2023-11-23 21:14:00,722 INFO L226 Difference]: Without dead ends: 750 [2023-11-23 21:14:00,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:14:00,726 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 169 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:00,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 720 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 21:14:00,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2023-11-23 21:14:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 740. [2023-11-23 21:14:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 425 states have (on average 1.2988235294117647) internal successors, (552), 438 states have internal predecessors, (552), 234 states have call successors, (234), 81 states have call predecessors, (234), 80 states have return successors, (233), 230 states have call predecessors, (233), 233 states have call successors, (233) [2023-11-23 21:14:00,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1019 transitions. [2023-11-23 21:14:00,783 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1019 transitions. Word has length 201 [2023-11-23 21:14:00,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:00,785 INFO L495 AbstractCegarLoop]: Abstraction has 740 states and 1019 transitions. [2023-11-23 21:14:00,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-11-23 21:14:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1019 transitions. [2023-11-23 21:14:00,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2023-11-23 21:14:00,792 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:00,793 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:00,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:14:00,793 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:00,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:00,794 INFO L85 PathProgramCache]: Analyzing trace with hash -755599735, now seen corresponding path program 1 times [2023-11-23 21:14:00,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:00,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145160107] [2023-11-23 21:14:00,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:00,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:00,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:01,392 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-11-23 21:14:01,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:01,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145160107] [2023-11-23 21:14:01,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145160107] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:01,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:14:01,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:14:01,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585321954] [2023-11-23 21:14:01,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:01,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:14:01,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:01,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:14:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:14:01,397 INFO L87 Difference]: Start difference. First operand 740 states and 1019 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2023-11-23 21:14:01,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:01,965 INFO L93 Difference]: Finished difference Result 1453 states and 1978 transitions. [2023-11-23 21:14:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:14:01,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) Word has length 260 [2023-11-23 21:14:01,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:01,975 INFO L225 Difference]: With dead ends: 1453 [2023-11-23 21:14:01,975 INFO L226 Difference]: Without dead ends: 669 [2023-11-23 21:14:01,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:14:01,980 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 400 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:01,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 664 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:14:01,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2023-11-23 21:14:02,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 664. [2023-11-23 21:14:02,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 379 states have (on average 1.279683377308707) internal successors, (485), 390 states have internal predecessors, (485), 205 states have call successors, (205), 80 states have call predecessors, (205), 79 states have return successors, (204), 203 states have call predecessors, (204), 204 states have call successors, (204) [2023-11-23 21:14:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 894 transitions. [2023-11-23 21:14:02,047 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 894 transitions. Word has length 260 [2023-11-23 21:14:02,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:02,049 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 894 transitions. [2023-11-23 21:14:02,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2023-11-23 21:14:02,050 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 894 transitions. [2023-11-23 21:14:02,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-11-23 21:14:02,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:02,057 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:02,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:14:02,058 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:02,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:02,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1562119393, now seen corresponding path program 1 times [2023-11-23 21:14:02,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:02,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65002859] [2023-11-23 21:14:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:02,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-11-23 21:14:03,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:03,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65002859] [2023-11-23 21:14:03,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65002859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:03,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:14:03,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:14:03,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812447704] [2023-11-23 21:14:03,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:03,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:14:03,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:03,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:14:03,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:14:03,260 INFO L87 Difference]: Start difference. First operand 664 states and 894 transitions. Second operand has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (47), 3 states have call predecessors, (47), 2 states have call successors, (47) [2023-11-23 21:14:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:03,775 INFO L93 Difference]: Finished difference Result 1229 states and 1661 transitions. [2023-11-23 21:14:03,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:14:03,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (47), 3 states have call predecessors, (47), 2 states have call successors, (47) Word has length 263 [2023-11-23 21:14:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:03,781 INFO L225 Difference]: With dead ends: 1229 [2023-11-23 21:14:03,782 INFO L226 Difference]: Without dead ends: 666 [2023-11-23 21:14:03,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:14:03,785 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 1 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:03,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1855 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:14:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2023-11-23 21:14:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 664. [2023-11-23 21:14:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 379 states have (on average 1.2770448548812665) internal successors, (484), 390 states have internal predecessors, (484), 205 states have call successors, (205), 80 states have call predecessors, (205), 79 states have return successors, (204), 203 states have call predecessors, (204), 204 states have call successors, (204) [2023-11-23 21:14:03,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 893 transitions. [2023-11-23 21:14:03,836 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 893 transitions. Word has length 263 [2023-11-23 21:14:03,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:03,837 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 893 transitions. [2023-11-23 21:14:03,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (47), 3 states have call predecessors, (47), 2 states have call successors, (47) [2023-11-23 21:14:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 893 transitions. [2023-11-23 21:14:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-23 21:14:03,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:03,844 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:03,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:14:03,845 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:03,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:03,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1362162291, now seen corresponding path program 1 times [2023-11-23 21:14:03,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:03,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027332432] [2023-11-23 21:14:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:03,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:04,817 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2023-11-23 21:14:04,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:04,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027332432] [2023-11-23 21:14:04,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027332432] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:04,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554841715] [2023-11-23 21:14:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:04,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:04,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:04,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:04,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:14:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:05,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 1765 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:14:05,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-11-23 21:14:06,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:14:06,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554841715] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:06,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:14:06,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-11-23 21:14:06,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120198950] [2023-11-23 21:14:06,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:06,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:14:06,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:06,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:14:06,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:14:06,078 INFO L87 Difference]: Start difference. First operand 664 states and 893 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2023-11-23 21:14:08,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:08,008 INFO L93 Difference]: Finished difference Result 1659 states and 2299 transitions. [2023-11-23 21:14:08,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:14:08,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) Word has length 267 [2023-11-23 21:14:08,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:08,024 INFO L225 Difference]: With dead ends: 1659 [2023-11-23 21:14:08,024 INFO L226 Difference]: Without dead ends: 1471 [2023-11-23 21:14:08,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:14:08,028 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 828 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:08,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 1399 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-23 21:14:08,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2023-11-23 21:14:08,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1256. [2023-11-23 21:14:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 731 states have (on average 1.3160054719562244) internal successors, (962), 758 states have internal predecessors, (962), 385 states have call successors, (385), 140 states have call predecessors, (385), 139 states have return successors, (384), 378 states have call predecessors, (384), 384 states have call successors, (384) [2023-11-23 21:14:08,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1731 transitions. [2023-11-23 21:14:08,180 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1731 transitions. Word has length 267 [2023-11-23 21:14:08,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:08,186 INFO L495 AbstractCegarLoop]: Abstraction has 1256 states and 1731 transitions. [2023-11-23 21:14:08,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (51), 3 states have call predecessors, (51), 3 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2023-11-23 21:14:08,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1731 transitions. [2023-11-23 21:14:08,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-11-23 21:14:08,199 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:08,200 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:08,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:14:08,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:08,420 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:08,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:08,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1134744005, now seen corresponding path program 1 times [2023-11-23 21:14:08,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:08,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872893375] [2023-11-23 21:14:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:08,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2023-11-23 21:14:08,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:08,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872893375] [2023-11-23 21:14:08,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872893375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:08,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:14:08,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:14:08,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808910672] [2023-11-23 21:14:08,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:08,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:14:08,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:08,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:14:08,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:14:08,812 INFO L87 Difference]: Start difference. First operand 1256 states and 1731 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2023-11-23 21:14:11,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:14:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:11,224 INFO L93 Difference]: Finished difference Result 2878 states and 3972 transitions. [2023-11-23 21:14:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:14:11,225 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) Word has length 330 [2023-11-23 21:14:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:11,240 INFO L225 Difference]: With dead ends: 2878 [2023-11-23 21:14:11,241 INFO L226 Difference]: Without dead ends: 1841 [2023-11-23 21:14:11,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:14:11,271 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 247 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:11,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 755 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 102 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2023-11-23 21:14:11,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1841 states. [2023-11-23 21:14:11,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1841 to 1835. [2023-11-23 21:14:11,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1835 states, 1075 states have (on average 1.3013953488372092) internal successors, (1399), 1113 states have internal predecessors, (1399), 542 states have call successors, (542), 218 states have call predecessors, (542), 217 states have return successors, (541), 534 states have call predecessors, (541), 541 states have call successors, (541) [2023-11-23 21:14:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2482 transitions. [2023-11-23 21:14:11,465 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2482 transitions. Word has length 330 [2023-11-23 21:14:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:11,466 INFO L495 AbstractCegarLoop]: Abstraction has 1835 states and 2482 transitions. [2023-11-23 21:14:11,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2023-11-23 21:14:11,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2482 transitions. [2023-11-23 21:14:11,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2023-11-23 21:14:11,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:11,480 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:11,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:14:11,481 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:11,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:11,482 INFO L85 PathProgramCache]: Analyzing trace with hash 654817253, now seen corresponding path program 2 times [2023-11-23 21:14:11,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:11,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683797354] [2023-11-23 21:14:11,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:11,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 452 trivial. 0 not checked. [2023-11-23 21:14:12,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:12,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683797354] [2023-11-23 21:14:12,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683797354] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:12,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:14:12,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:14:12,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901551827] [2023-11-23 21:14:12,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:12,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:14:12,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:12,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:14:12,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:14:12,009 INFO L87 Difference]: Start difference. First operand 1835 states and 2482 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2023-11-23 21:14:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:12,507 INFO L93 Difference]: Finished difference Result 4807 states and 6544 transitions. [2023-11-23 21:14:12,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:14:12,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) Word has length 330 [2023-11-23 21:14:12,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:12,537 INFO L225 Difference]: With dead ends: 4807 [2023-11-23 21:14:12,538 INFO L226 Difference]: Without dead ends: 3438 [2023-11-23 21:14:12,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:14:12,547 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 345 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:12,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 630 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:14:12,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3438 states. [2023-11-23 21:14:12,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3438 to 3290. [2023-11-23 21:14:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 1942 states have (on average 1.3125643666323379) internal successors, (2549), 2013 states have internal predecessors, (2549), 967 states have call successors, (967), 381 states have call predecessors, (967), 380 states have return successors, (986), 951 states have call predecessors, (986), 966 states have call successors, (986) [2023-11-23 21:14:12,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 4502 transitions. [2023-11-23 21:14:12,955 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 4502 transitions. Word has length 330 [2023-11-23 21:14:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:12,956 INFO L495 AbstractCegarLoop]: Abstraction has 3290 states and 4502 transitions. [2023-11-23 21:14:12,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2023-11-23 21:14:12,957 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 4502 transitions. [2023-11-23 21:14:12,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2023-11-23 21:14:12,983 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:12,983 INFO L195 NwaCegarLoop]: trace histogram [11, 9, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:12,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:14:12,984 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:12,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:12,985 INFO L85 PathProgramCache]: Analyzing trace with hash 918211838, now seen corresponding path program 1 times [2023-11-23 21:14:12,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:12,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444732923] [2023-11-23 21:14:12,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:12,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:13,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:13,364 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2023-11-23 21:14:13,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:13,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444732923] [2023-11-23 21:14:13,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444732923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:13,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:14:13,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:14:13,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496628035] [2023-11-23 21:14:13,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:13,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:14:13,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:13,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:14:13,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:14:13,369 INFO L87 Difference]: Start difference. First operand 3290 states and 4502 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2023-11-23 21:14:13,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:13,922 INFO L93 Difference]: Finished difference Result 6401 states and 8800 transitions. [2023-11-23 21:14:13,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:14:13,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) Word has length 357 [2023-11-23 21:14:13,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:13,954 INFO L225 Difference]: With dead ends: 6401 [2023-11-23 21:14:13,954 INFO L226 Difference]: Without dead ends: 3330 [2023-11-23 21:14:13,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:14:13,966 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 3 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:13,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 758 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:14:13,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2023-11-23 21:14:14,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 3330. [2023-11-23 21:14:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 1962 states have (on average 1.3042813455657492) internal successors, (2559), 2043 states have internal predecessors, (2559), 977 states have call successors, (977), 381 states have call predecessors, (977), 390 states have return successors, (1006), 961 states have call predecessors, (1006), 976 states have call successors, (1006) [2023-11-23 21:14:14,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 4542 transitions. [2023-11-23 21:14:14,270 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 4542 transitions. Word has length 357 [2023-11-23 21:14:14,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:14,272 INFO L495 AbstractCegarLoop]: Abstraction has 3330 states and 4542 transitions. [2023-11-23 21:14:14,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (60), 2 states have call predecessors, (60), 2 states have return successors, (59), 3 states have call predecessors, (59), 3 states have call successors, (59) [2023-11-23 21:14:14,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 4542 transitions. [2023-11-23 21:14:14,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2023-11-23 21:14:14,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:14,289 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:14,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:14:14,289 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:14,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash -683457747, now seen corresponding path program 1 times [2023-11-23 21:14:14,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:14,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393124222] [2023-11-23 21:14:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:14,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2023-11-23 21:14:15,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:15,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393124222] [2023-11-23 21:14:15,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393124222] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:15,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573228234] [2023-11-23 21:14:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:15,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:15,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:15,332 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:15,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:14:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:15,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 2047 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:14:15,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2023-11-23 21:14:16,101 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:14:16,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573228234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:16,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:14:16,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-11-23 21:14:16,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700627321] [2023-11-23 21:14:16,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:16,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:14:16,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:16,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:14:16,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:14:16,106 INFO L87 Difference]: Start difference. First operand 3330 states and 4542 transitions. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2023-11-23 21:14:16,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:16,640 INFO L93 Difference]: Finished difference Result 6448 states and 8819 transitions. [2023-11-23 21:14:16,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:14:16,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) Word has length 363 [2023-11-23 21:14:16,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:16,665 INFO L225 Difference]: With dead ends: 6448 [2023-11-23 21:14:16,666 INFO L226 Difference]: Without dead ends: 3327 [2023-11-23 21:14:16,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 21:14:16,681 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 5 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1490 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:16,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1490 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:14:16,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2023-11-23 21:14:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 3322. [2023-11-23 21:14:16,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 1958 states have (on average 1.3043922369765066) internal successors, (2554), 2039 states have internal predecessors, (2554), 974 states have call successors, (974), 380 states have call predecessors, (974), 389 states have return successors, (1003), 958 states have call predecessors, (1003), 973 states have call successors, (1003) [2023-11-23 21:14:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 4531 transitions. [2023-11-23 21:14:17,008 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 4531 transitions. Word has length 363 [2023-11-23 21:14:17,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:17,008 INFO L495 AbstractCegarLoop]: Abstraction has 3322 states and 4531 transitions. [2023-11-23 21:14:17,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 3 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (50), 3 states have call predecessors, (50), 3 states have call successors, (50) [2023-11-23 21:14:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 4531 transitions. [2023-11-23 21:14:17,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-23 21:14:17,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:17,032 INFO L195 NwaCegarLoop]: trace histogram [29, 20, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:17,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:14:17,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:17,257 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:17,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:17,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1451994234, now seen corresponding path program 1 times [2023-11-23 21:14:17,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:17,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093002191] [2023-11-23 21:14:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:17,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:18,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 1555 trivial. 0 not checked. [2023-11-23 21:14:18,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:18,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093002191] [2023-11-23 21:14:18,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093002191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:18,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:14:18,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:14:18,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893617766] [2023-11-23 21:14:18,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:18,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:14:18,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:18,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:14:18,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:14:18,933 INFO L87 Difference]: Start difference. First operand 3322 states and 4531 transitions. Second operand has 6 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (72), 3 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-23 21:14:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:19,672 INFO L93 Difference]: Finished difference Result 6489 states and 8862 transitions. [2023-11-23 21:14:19,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:14:19,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (72), 3 states have call predecessors, (72), 2 states have call successors, (72) Word has length 474 [2023-11-23 21:14:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:19,702 INFO L225 Difference]: With dead ends: 6489 [2023-11-23 21:14:19,702 INFO L226 Difference]: Without dead ends: 3322 [2023-11-23 21:14:19,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:14:19,719 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 1 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:19,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1804 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:14:19,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3322 states. [2023-11-23 21:14:19,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3322 to 3322. [2023-11-23 21:14:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 1958 states have (on average 1.3038815117466802) internal successors, (2553), 2039 states have internal predecessors, (2553), 974 states have call successors, (974), 380 states have call predecessors, (974), 389 states have return successors, (1003), 958 states have call predecessors, (1003), 973 states have call successors, (1003) [2023-11-23 21:14:19,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 4530 transitions. [2023-11-23 21:14:19,992 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 4530 transitions. Word has length 474 [2023-11-23 21:14:19,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:19,993 INFO L495 AbstractCegarLoop]: Abstraction has 3322 states and 4530 transitions. [2023-11-23 21:14:19,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 22.2) internal successors, (111), 5 states have internal predecessors, (111), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (72), 3 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-23 21:14:19,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 4530 transitions. [2023-11-23 21:14:20,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2023-11-23 21:14:20,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:20,016 INFO L195 NwaCegarLoop]: trace histogram [29, 20, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:20,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 21:14:20,017 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:20,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:20,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1634152396, now seen corresponding path program 1 times [2023-11-23 21:14:20,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:20,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662253581] [2023-11-23 21:14:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:20,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1574 trivial. 0 not checked. [2023-11-23 21:14:21,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:21,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662253581] [2023-11-23 21:14:21,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662253581] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:21,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160942664] [2023-11-23 21:14:21,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:21,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:21,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:21,372 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:21,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:14:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:22,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 2444 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:14:22,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:22,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2023-11-23 21:14:22,258 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:14:22,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160942664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:14:22,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:14:22,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-23 21:14:22,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253225666] [2023-11-23 21:14:22,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:14:22,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:14:22,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:14:22,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:14:22,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:14:22,263 INFO L87 Difference]: Start difference. First operand 3322 states and 4530 transitions. Second operand has 4 states, 3 states have (on average 38.0) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (75), 2 states have call predecessors, (75), 3 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2023-11-23 21:14:22,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:14:22,826 INFO L93 Difference]: Finished difference Result 6628 states and 9045 transitions. [2023-11-23 21:14:22,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:14:22,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 38.0) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (75), 2 states have call predecessors, (75), 3 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) Word has length 478 [2023-11-23 21:14:22,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:14:22,853 INFO L225 Difference]: With dead ends: 6628 [2023-11-23 21:14:22,854 INFO L226 Difference]: Without dead ends: 3323 [2023-11-23 21:14:22,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:14:22,868 INFO L413 NwaCegarLoop]: 361 mSDtfsCounter, 0 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:14:22,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1069 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:14:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2023-11-23 21:14:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 3323. [2023-11-23 21:14:23,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3323 states, 1959 states have (on average 1.3037263910158243) internal successors, (2554), 2040 states have internal predecessors, (2554), 974 states have call successors, (974), 380 states have call predecessors, (974), 389 states have return successors, (1003), 958 states have call predecessors, (1003), 973 states have call successors, (1003) [2023-11-23 21:14:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3323 states to 3323 states and 4531 transitions. [2023-11-23 21:14:23,163 INFO L78 Accepts]: Start accepts. Automaton has 3323 states and 4531 transitions. Word has length 478 [2023-11-23 21:14:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:14:23,163 INFO L495 AbstractCegarLoop]: Abstraction has 3323 states and 4531 transitions. [2023-11-23 21:14:23,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 38.0) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (75), 2 states have call predecessors, (75), 3 states have return successors, (74), 2 states have call predecessors, (74), 2 states have call successors, (74) [2023-11-23 21:14:23,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3323 states and 4531 transitions. [2023-11-23 21:14:23,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2023-11-23 21:14:23,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:14:23,179 INFO L195 NwaCegarLoop]: trace histogram [29, 20, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:14:23,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:14:23,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:23,393 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:14:23,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:14:23,394 INFO L85 PathProgramCache]: Analyzing trace with hash 615921944, now seen corresponding path program 1 times [2023-11-23 21:14:23,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:14:23,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876675235] [2023-11-23 21:14:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:23,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:14:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1635 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1609 trivial. 0 not checked. [2023-11-23 21:14:25,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:14:25,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876675235] [2023-11-23 21:14:25,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876675235] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:14:25,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064823067] [2023-11-23 21:14:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:14:25,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:14:25,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:14:25,097 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:14:25,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_358499c9-42a9-4d7e-a58c-5b5a25d00d9a/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:14:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:14:26,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-23 21:14:26,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:14:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1635 backedges. 159 proven. 5 refuted. 0 times theorem prover too weak. 1471 trivial. 0 not checked. [2023-11-23 21:14:26,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:14:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1635 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 1609 trivial. 0 not checked. [2023-11-23 21:14:26,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064823067] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:14:26,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991347616] [2023-11-23 21:14:26,936 INFO L159 IcfgInterpreter]: Started Sifa with 198 locations of interest [2023-11-23 21:14:26,937 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:14:26,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:14:26,946 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:14:26,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs