./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--it87_wdt.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2 --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 fe8c4b1a27642c802f8c97577aadb7892fddcd015ae43c580aa1247dba190651 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:23:38,334 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:23:38,401 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-64bit-Taipan_Default.epf [2024-11-02 12:23:38,406 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:23:38,407 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:23:38,432 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:23:38,432 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:23:38,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:23:38,434 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:23:38,434 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:23:38,435 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:23:38,435 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:23:38,436 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:23:38,436 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:23:38,436 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:23:38,437 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:23:38,437 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:23:38,438 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:23:38,438 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:23:38,440 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:23:38,440 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:23:38,444 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:23:38,445 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:23:38,445 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:23:38,445 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:23:38,446 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:23:38,446 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:23:38,446 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:23:38,446 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:23:38,450 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:23:38,450 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:23:38,450 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:23:38,451 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:23:38,451 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:23:38,451 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:23:38,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:23:38,452 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:23:38,452 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:23:38,452 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:23:38,453 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:23:38,454 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:23:38,455 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:23:38,455 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:23:38,455 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:23:38,456 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_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe8c4b1a27642c802f8c97577aadb7892fddcd015ae43c580aa1247dba190651 [2024-11-02 12:23:38,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:23:38,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:23:38,811 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:23:38,813 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:23:38,814 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:23:38,815 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i Unable to find full path for "g++" [2024-11-02 12:23:41,090 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:23:41,528 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:23:41,529 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2024-11-02 12:23:41,566 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/data/b35e0a823/5bf32298908a4e1ebb276d73a9ed19bb/FLAG305a61d4f [2024-11-02 12:23:41,585 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/data/b35e0a823/5bf32298908a4e1ebb276d73a9ed19bb [2024-11-02 12:23:41,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:23:41,593 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:23:41,594 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:23:41,596 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:23:41,602 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:23:41,603 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:23:41" (1/1) ... [2024-11-02 12:23:41,604 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf3b831 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:41, skipping insertion in model container [2024-11-02 12:23:41,607 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:23:41" (1/1) ... [2024-11-02 12:23:41,714 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:23:42,719 WARN L251 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_1f112fdd-63ab-4243-ba75-a56043530ef8/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i[120162,120175] [2024-11-02 12:23:42,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:23:42,793 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:23:42,964 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [3119] [2024-11-02 12:23:42,968 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)); [3126] [2024-11-02 12:23:42,969 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"); [3134-3135] [2024-11-02 12:23:42,971 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [3143-3144] [2024-11-02 12:23:42,977 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [3164] [2024-11-02 12:23:42,980 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [3172] [2024-11-02 12:23:43,042 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("call __get_user_%P3": "=a" (__ret_gu), "=r" (__val_gu): "0" (buf + ofs), "i" (1UL)); [3673-3674] [2024-11-02 12:23:43,051 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"); [3734] [2024-11-02 12:23:43,052 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"); [3737] [2024-11-02 12:23:43,053 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"); [3740] [2024-11-02 12:23:43,054 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"); [3743] [2024-11-02 12:23:43,054 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"); [3746] [2024-11-02 12:23:43,056 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"); [3757-3758] [2024-11-02 12:23:43,056 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"); [3761-3762] [2024-11-02 12:23:43,059 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"); [3765-3766] [2024-11-02 12:23:43,060 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"); [3769-3770] [2024-11-02 12:23:43,060 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"); [3773-3774] [2024-11-02 12:23:43,062 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)); [3785-3786] [2024-11-02 12:23:43,065 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)); [3823-3824] [2024-11-02 12:23:43,068 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"); [3837-3838] [2024-11-02 12:23:43,068 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"); [3841-3842] [2024-11-02 12:23:43,070 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"); [3845-3846] [2024-11-02 12:23:43,071 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"); [3849-3850] [2024-11-02 12:23:43,072 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"); [3853-3854] [2024-11-02 12:23:43,133 WARN L251 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_1f112fdd-63ab-4243-ba75-a56043530ef8/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i[120162,120175] [2024-11-02 12:23:43,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:23:43,196 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:23:43,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:43 WrapperNode [2024-11-02 12:23:43,197 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:23:43,198 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:23:43,199 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:23:43,199 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:23:43,207 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:43" (1/1) ... [2024-11-02 12:23:43,253 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:43" (1/1) ... [2024-11-02 12:23:43,345 INFO L138 Inliner]: procedures = 96, calls = 407, calls flagged for inlining = 31, calls inlined = 28, statements flattened = 1298 [2024-11-02 12:23:43,346 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:23:43,347 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:23:43,347 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:23:43,347 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:23:43,358 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:43" (1/1) ... [2024-11-02 12:23:43,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:43" (1/1) ... [2024-11-02 12:23:43,370 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:43" (1/1) ... [2024-11-02 12:23:43,373 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:43" (1/1) ... [2024-11-02 12:23:43,405 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:43" (1/1) ... [2024-11-02 12:23:43,415 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:43" (1/1) ... [2024-11-02 12:23:43,422 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:43" (1/1) ... [2024-11-02 12:23:43,428 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:43" (1/1) ... [2024-11-02 12:23:43,446 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:23:43,447 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:23:43,447 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:23:43,447 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:23:43,452 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:43" (1/1) ... [2024-11-02 12:23:43,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:23:43,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:23:43,507 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:23:43,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:23:43,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:23:43,548 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inw [2024-11-02 12:23:43,548 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inw [2024-11-02 12:23:43,548 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outw [2024-11-02 12:23:43,550 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outw [2024-11-02 12:23:43,551 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_stop [2024-11-02 12:23:43,551 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_stop [2024-11-02 12:23:43,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2024-11-02 12:23:43,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:23:43,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-02 12:23:43,552 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_write [2024-11-02 12:23:43,552 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_write [2024-11-02 12:23:43,552 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_update_timeout [2024-11-02 12:23:43,553 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_update_timeout [2024-11-02 12:23:43,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2024-11-02 12:23:43,553 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2024-11-02 12:23:43,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2024-11-02 12:23:43,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:23:43,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-11-02 12:23:43,554 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-11-02 12:23:43,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:23:43,554 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_round_time [2024-11-02 12:23:43,554 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_round_time [2024-11-02 12:23:43,554 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2024-11-02 12:23:43,555 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2024-11-02 12:23:43,555 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2024-11-02 12:23:43,555 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2024-11-02 12:23:43,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:23:43,555 INFO L130 BoogieDeclarations]: Found specification of procedure superio_exit [2024-11-02 12:23:43,556 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_exit [2024-11-02 12:23:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2024-11-02 12:23:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2024-11-02 12:23:43,556 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2024-11-02 12:23:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2024-11-02 12:23:43,556 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2024-11-02 12:23:43,557 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:23:43,557 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2024-11-02 12:23:43,557 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2024-11-02 12:23:43,557 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2024-11-02 12:23:43,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2024-11-02 12:23:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_start [2024-11-02 12:23:43,558 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_start [2024-11-02 12:23:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure superio_select [2024-11-02 12:23:43,558 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_select [2024-11-02 12:23:43,558 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2024-11-02 12:23:43,558 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2024-11-02 12:23:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2024-11-02 12:23:43,559 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2024-11-02 12:23:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2024-11-02 12:23:43,559 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2024-11-02 12:23:43,559 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2024-11-02 12:23:43,560 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2024-11-02 12:23:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure superio_enter [2024-11-02 12:23:43,560 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_enter [2024-11-02 12:23:43,560 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2024-11-02 12:23:43,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2024-11-02 12:23:43,561 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-02 12:23:43,561 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-02 12:23:43,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:23:43,562 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_keepalive [2024-11-02 12:23:43,562 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_keepalive [2024-11-02 12:23:43,562 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2024-11-02 12:23:43,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2024-11-02 12:23:43,563 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inb [2024-11-02 12:23:43,563 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inb [2024-11-02 12:23:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outb [2024-11-02 12:23:43,564 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outb [2024-11-02 12:23:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:23:43,564 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2024-11-02 12:23:43,565 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2024-11-02 12:23:43,565 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2024-11-02 12:23:43,565 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2024-11-02 12:23:43,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:23:43,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:23:43,566 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2024-11-02 12:23:43,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2024-11-02 12:23:43,873 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:23:43,876 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:23:44,204 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2024-11-02 12:23:47,631 INFO L? ?]: Removed 473 outVars from TransFormulas that were not future-live. [2024-11-02 12:23:47,632 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:23:48,115 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:23:48,120 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-02 12:23:48,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:23:48 BoogieIcfgContainer [2024-11-02 12:23:48,121 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:23:48,123 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:23:48,125 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:23:48,129 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:23:48,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:23:41" (1/3) ... [2024-11-02 12:23:48,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18dde446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:23:48, skipping insertion in model container [2024-11-02 12:23:48,131 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:23:43" (2/3) ... [2024-11-02 12:23:48,131 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18dde446 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:23:48, skipping insertion in model container [2024-11-02 12:23:48,132 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:23:48" (3/3) ... [2024-11-02 12:23:48,135 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2024-11-02 12:23:48,155 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:23:48,156 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:23:48,283 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:23:48,292 INFO L333 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, 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;@68ac2896, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:23:48,292 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:23:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand has 501 states, 278 states have (on average 1.39568345323741) internal successors, (388), 310 states have internal predecessors, (388), 191 states have call successors, (191), 31 states have call predecessors, (191), 30 states have return successors, (187), 182 states have call predecessors, (187), 187 states have call successors, (187) [2024-11-02 12:23:48,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-02 12:23:48,319 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:48,320 INFO L215 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, 1, 1] [2024-11-02 12:23:48,320 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:48,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:48,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1452919078, now seen corresponding path program 1 times [2024-11-02 12:23:48,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:48,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129351380] [2024-11-02 12:23:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:48,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:49,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-02 12:23:49,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:49,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129351380] [2024-11-02 12:23:49,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129351380] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:49,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:23:49,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:23:49,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304991591] [2024-11-02 12:23:49,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:49,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:49,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:49,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:49,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:23:49,642 INFO L87 Difference]: Start difference. First operand has 501 states, 278 states have (on average 1.39568345323741) internal successors, (388), 310 states have internal predecessors, (388), 191 states have call successors, (191), 31 states have call predecessors, (191), 30 states have return successors, (187), 182 states have call predecessors, (187), 187 states have call successors, (187) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2024-11-02 12:23:51,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:23:52,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:52,132 INFO L93 Difference]: Finished difference Result 977 states and 1498 transitions. [2024-11-02 12:23:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:52,135 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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 105 [2024-11-02 12:23:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:52,167 INFO L225 Difference]: With dead ends: 977 [2024-11-02 12:23:52,167 INFO L226 Difference]: Without dead ends: 925 [2024-11-02 12:23:52,174 INFO L431 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 [2024-11-02 12:23:52,182 INFO L432 NwaCegarLoop]: 803 mSDtfsCounter, 726 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:52,183 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 1488 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2024-11-02 12:23:52,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2024-11-02 12:23:52,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 924. [2024-11-02 12:23:52,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 521 states have (on average 1.381957773512476) internal successors, (720), 568 states have internal predecessors, (720), 345 states have call successors, (345), 58 states have call predecessors, (345), 57 states have return successors, (344), 335 states have call predecessors, (344), 344 states have call successors, (344) [2024-11-02 12:23:52,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1409 transitions. [2024-11-02 12:23:52,355 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1409 transitions. Word has length 105 [2024-11-02 12:23:52,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:52,358 INFO L471 AbstractCegarLoop]: Abstraction has 924 states and 1409 transitions. [2024-11-02 12:23:52,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 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) [2024-11-02 12:23:52,358 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1409 transitions. [2024-11-02 12:23:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-02 12:23:52,373 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:52,376 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2024-11-02 12:23:52,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:23:52,377 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:52,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:52,377 INFO L85 PathProgramCache]: Analyzing trace with hash 786954249, now seen corresponding path program 1 times [2024-11-02 12:23:52,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:52,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160709235] [2024-11-02 12:23:52,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:52,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-11-02 12:23:52,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:52,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160709235] [2024-11-02 12:23:52,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160709235] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:52,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:23:52,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:23:52,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944619439] [2024-11-02 12:23:52,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:53,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:23:53,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:53,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:23:53,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:23:53,002 INFO L87 Difference]: Start difference. First operand 924 states and 1409 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-02 12:23:55,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:23:55,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:23:55,362 INFO L93 Difference]: Finished difference Result 2254 states and 3421 transitions. [2024-11-02 12:23:55,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:23:55,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 147 [2024-11-02 12:23:55,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:23:55,381 INFO L225 Difference]: With dead ends: 2254 [2024-11-02 12:23:55,382 INFO L226 Difference]: Without dead ends: 1354 [2024-11-02 12:23:55,391 INFO L431 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 [2024-11-02 12:23:55,395 INFO L432 NwaCegarLoop]: 710 mSDtfsCounter, 388 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1353 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:23:55,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1353 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2024-11-02 12:23:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2024-11-02 12:23:55,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1348. [2024-11-02 12:23:55,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 747 states have (on average 1.3761713520749665) internal successors, (1028), 814 states have internal predecessors, (1028), 506 states have call successors, (506), 95 states have call predecessors, (506), 94 states have return successors, (505), 492 states have call predecessors, (505), 505 states have call successors, (505) [2024-11-02 12:23:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 2039 transitions. [2024-11-02 12:23:55,528 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 2039 transitions. Word has length 147 [2024-11-02 12:23:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:23:55,529 INFO L471 AbstractCegarLoop]: Abstraction has 1348 states and 2039 transitions. [2024-11-02 12:23:55,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2024-11-02 12:23:55,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 2039 transitions. [2024-11-02 12:23:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2024-11-02 12:23:55,543 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:23:55,543 INFO L215 NwaCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:23:55,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:23:55,544 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:23:55,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:23:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1520346054, now seen corresponding path program 1 times [2024-11-02 12:23:55,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:23:55,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162970671] [2024-11-02 12:23:55,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:23:55,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:23:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:23:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2024-11-02 12:23:57,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:23:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162970671] [2024-11-02 12:23:57,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162970671] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:23:57,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:23:57,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:23:57,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076885098] [2024-11-02 12:23:57,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:23:57,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:23:57,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:23:57,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:23:57,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:23:57,024 INFO L87 Difference]: Start difference. First operand 1348 states and 2039 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 4 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) [2024-11-02 12:23:59,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:24:01,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:24:02,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:02,547 INFO L93 Difference]: Finished difference Result 2972 states and 4564 transitions. [2024-11-02 12:24:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:24:02,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 4 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) Word has length 309 [2024-11-02 12:24:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:02,565 INFO L225 Difference]: With dead ends: 2972 [2024-11-02 12:24:02,565 INFO L226 Difference]: Without dead ends: 1656 [2024-11-02 12:24:02,572 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:24:02,573 INFO L432 NwaCegarLoop]: 769 mSDtfsCounter, 793 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 17 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:02,574 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [838 Valid, 1079 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 553 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2024-11-02 12:24:02,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2024-11-02 12:24:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1622. [2024-11-02 12:24:02,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 885 states have (on average 1.3785310734463276) internal successors, (1220), 976 states have internal predecessors, (1220), 642 states have call successors, (642), 95 states have call predecessors, (642), 94 states have return successors, (641), 624 states have call predecessors, (641), 641 states have call successors, (641) [2024-11-02 12:24:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2503 transitions. [2024-11-02 12:24:02,779 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2503 transitions. Word has length 309 [2024-11-02 12:24:02,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:02,780 INFO L471 AbstractCegarLoop]: Abstraction has 1622 states and 2503 transitions. [2024-11-02 12:24:02,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 4 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (44), 4 states have call predecessors, (44), 4 states have call successors, (44) [2024-11-02 12:24:02,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2503 transitions. [2024-11-02 12:24:02,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2024-11-02 12:24:02,791 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:02,792 INFO L215 NwaCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:02,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:24:02,792 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:24:02,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:02,793 INFO L85 PathProgramCache]: Analyzing trace with hash 672278952, now seen corresponding path program 1 times [2024-11-02 12:24:02,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:02,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810012075] [2024-11-02 12:24:02,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:02,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2024-11-02 12:24:03,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:03,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810012075] [2024-11-02 12:24:03,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810012075] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:03,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:24:03,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 12:24:03,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395265770] [2024-11-02 12:24:03,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:03,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:24:03,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:03,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:24:03,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:24:03,595 INFO L87 Difference]: Start difference. First operand 1622 states and 2503 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2024-11-02 12:24:05,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:24:05,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:05,877 INFO L93 Difference]: Finished difference Result 3212 states and 4964 transitions. [2024-11-02 12:24:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:24:05,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 312 [2024-11-02 12:24:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:05,890 INFO L225 Difference]: With dead ends: 3212 [2024-11-02 12:24:05,891 INFO L226 Difference]: Without dead ends: 1622 [2024-11-02 12:24:05,898 INFO L431 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 [2024-11-02 12:24:05,901 INFO L432 NwaCegarLoop]: 706 mSDtfsCounter, 704 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:05,902 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 706 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2024-11-02 12:24:05,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2024-11-02 12:24:06,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1622. [2024-11-02 12:24:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 885 states have (on average 1.3694915254237288) internal successors, (1212), 976 states have internal predecessors, (1212), 642 states have call successors, (642), 95 states have call predecessors, (642), 94 states have return successors, (641), 624 states have call predecessors, (641), 641 states have call successors, (641) [2024-11-02 12:24:06,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2495 transitions. [2024-11-02 12:24:06,061 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2495 transitions. Word has length 312 [2024-11-02 12:24:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:06,063 INFO L471 AbstractCegarLoop]: Abstraction has 1622 states and 2495 transitions. [2024-11-02 12:24:06,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2024-11-02 12:24:06,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2495 transitions. [2024-11-02 12:24:06,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2024-11-02 12:24:06,072 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:06,073 INFO L215 NwaCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:06,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:24:06,073 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:24:06,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:06,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1406924690, now seen corresponding path program 1 times [2024-11-02 12:24:06,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:06,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128574380] [2024-11-02 12:24:06,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:06,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2024-11-02 12:24:06,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:06,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128574380] [2024-11-02 12:24:06,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128574380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:24:06,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226563771] [2024-11-02 12:24:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:06,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:24:06,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:24:07,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:24:07,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:24:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:08,017 INFO L255 TraceCheckSpWp]: Trace formula consists of 2121 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-02 12:24:08,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:24:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2024-11-02 12:24:08,696 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:24:08,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226563771] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:08,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:24:08,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-02 12:24:08,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568530261] [2024-11-02 12:24:08,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:08,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:24:08,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:08,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:24:08,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:24:08,699 INFO L87 Difference]: Start difference. First operand 1622 states and 2495 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2024-11-02 12:24:10,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-02 12:24:10,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:24:10,954 INFO L93 Difference]: Finished difference Result 3212 states and 4948 transitions. [2024-11-02 12:24:10,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:24:10,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) Word has length 317 [2024-11-02 12:24:10,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:24:10,968 INFO L225 Difference]: With dead ends: 3212 [2024-11-02 12:24:10,968 INFO L226 Difference]: Without dead ends: 1622 [2024-11-02 12:24:10,975 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-02 12:24:10,976 INFO L432 NwaCegarLoop]: 705 mSDtfsCounter, 587 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:24:10,977 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 705 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2024-11-02 12:24:10,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2024-11-02 12:24:11,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1622. [2024-11-02 12:24:11,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1622 states, 885 states have (on average 1.3672316384180792) internal successors, (1210), 976 states have internal predecessors, (1210), 642 states have call successors, (642), 95 states have call predecessors, (642), 94 states have return successors, (641), 624 states have call predecessors, (641), 641 states have call successors, (641) [2024-11-02 12:24:11,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1622 states to 1622 states and 2493 transitions. [2024-11-02 12:24:11,150 INFO L78 Accepts]: Start accepts. Automaton has 1622 states and 2493 transitions. Word has length 317 [2024-11-02 12:24:11,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:24:11,152 INFO L471 AbstractCegarLoop]: Abstraction has 1622 states and 2493 transitions. [2024-11-02 12:24:11,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (47), 2 states have call predecessors, (47), 2 states have return successors, (46), 2 states have call predecessors, (46), 2 states have call successors, (46) [2024-11-02 12:24:11,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1622 states and 2493 transitions. [2024-11-02 12:24:11,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2024-11-02 12:24:11,164 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:24:11,165 INFO L215 NwaCegarLoop]: trace histogram [13, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:24:11,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:24:11,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f112fdd-63ab-4243-ba75-a56043530ef8/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:24:11,366 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:24:11,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:24:11,366 INFO L85 PathProgramCache]: Analyzing trace with hash 392684454, now seen corresponding path program 1 times [2024-11-02 12:24:11,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:24:11,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705285975] [2024-11-02 12:24:11,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:24:11,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:24:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:24:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2024-11-02 12:24:12,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:24:12,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705285975] [2024-11-02 12:24:12,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705285975] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:24:12,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:24:12,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:24:12,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110594796] [2024-11-02 12:24:12,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:24:12,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:24:12,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:24:12,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:24:12,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:24:12,370 INFO L87 Difference]: Start difference. First operand 1622 states and 2493 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 3 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (46), 3 states have call predecessors, (46), 3 states have call successors, (46)