./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 9bd2c7ff 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_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/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_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ --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 0.2.3-dev-9bd2c7f [2023-11-19 04:46:23,438 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:46:23,566 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 04:46:23,574 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:46:23,575 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:46:23,616 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:46:23,617 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:46:23,618 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:46:23,619 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:46:23,624 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:46:23,624 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:46:23,625 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:46:23,625 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:46:23,627 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:46:23,628 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:46:23,628 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:46:23,628 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:46:23,629 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:46:23,629 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:46:23,630 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:46:23,630 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:46:23,631 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:46:23,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:46:23,633 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:46:23,633 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:46:23,634 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:46:23,634 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:46:23,635 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:46:23,635 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:46:23,636 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:46:23,637 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:46:23,639 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:46:23,639 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:46:23,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:46:23,640 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:46:23,640 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:46:23,640 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:46:23,640 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:46:23,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:46:23,641 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:46:23,641 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:46:23,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:46:23,642 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_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe8c4b1a27642c802f8c97577aadb7892fddcd015ae43c580aa1247dba190651 [2023-11-19 04:46:23,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:46:23,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:46:23,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:46:23,974 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:46:23,975 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:46:23,976 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/../../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 [2023-11-19 04:46:27,244 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:46:27,713 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:46:27,714 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/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 [2023-11-19 04:46:27,758 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/data/82e92f7a4/80785e80458e41de841b1d6f04295bc4/FLAG057e2945a [2023-11-19 04:46:27,776 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/data/82e92f7a4/80785e80458e41de841b1d6f04295bc4 [2023-11-19 04:46:27,782 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:46:27,784 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:46:27,787 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:46:27,787 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:46:27,793 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:46:27,794 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:46:27" (1/1) ... [2023-11-19 04:46:27,795 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ea59253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:27, skipping insertion in model container [2023-11-19 04:46:27,795 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:46:27" (1/1) ... [2023-11-19 04:46:27,905 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:46:28,867 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_3412d15e-465b-47ca-8187-3940f3fd989c/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] [2023-11-19 04:46:28,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:46:28,941 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:46:29,144 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] [2023-11-19 04:46:29,147 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] [2023-11-19 04:46:29,147 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] [2023-11-19 04:46:29,148 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] [2023-11-19 04:46:29,153 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [3164] [2023-11-19 04:46:29,154 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [3172] [2023-11-19 04:46:29,185 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] [2023-11-19 04:46:29,191 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] [2023-11-19 04:46:29,191 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] [2023-11-19 04:46:29,192 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] [2023-11-19 04:46:29,192 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] [2023-11-19 04:46:29,193 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] [2023-11-19 04:46:29,194 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] [2023-11-19 04:46:29,201 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] [2023-11-19 04:46:29,201 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] [2023-11-19 04:46:29,202 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] [2023-11-19 04:46:29,202 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] [2023-11-19 04:46:29,203 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] [2023-11-19 04:46:29,205 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] [2023-11-19 04:46:29,207 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] [2023-11-19 04:46:29,207 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] [2023-11-19 04:46:29,208 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] [2023-11-19 04:46:29,208 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] [2023-11-19 04:46:29,209 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] [2023-11-19 04:46:29,232 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_3412d15e-465b-47ca-8187-3940f3fd989c/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] [2023-11-19 04:46:29,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:46:29,289 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:46:29,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:29 WrapperNode [2023-11-19 04:46:29,290 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:46:29,291 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:46:29,291 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:46:29,292 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:46:29,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:29" (1/1) ... [2023-11-19 04:46:29,350 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:29" (1/1) ... [2023-11-19 04:46:29,435 INFO L138 Inliner]: procedures = 95, calls = 384, calls flagged for inlining = 31, calls inlined = 28, statements flattened = 1211 [2023-11-19 04:46:29,436 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:46:29,437 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:46:29,437 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:46:29,437 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:46:29,447 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:29" (1/1) ... [2023-11-19 04:46:29,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:29" (1/1) ... [2023-11-19 04:46:29,461 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:29" (1/1) ... [2023-11-19 04:46:29,462 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:29" (1/1) ... [2023-11-19 04:46:29,507 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:29" (1/1) ... [2023-11-19 04:46:29,532 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:29" (1/1) ... [2023-11-19 04:46:29,557 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:29" (1/1) ... [2023-11-19 04:46:29,568 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:29" (1/1) ... [2023-11-19 04:46:29,581 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:46:29,582 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:46:29,582 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:46:29,582 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:46:29,583 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:29" (1/1) ... [2023-11-19 04:46:29,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:46:29,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:46:29,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:46:29,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:46:29,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:46:29,658 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inw [2023-11-19 04:46:29,658 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inw [2023-11-19 04:46:29,658 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outw [2023-11-19 04:46:29,659 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outw [2023-11-19 04:46:29,659 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_stop [2023-11-19 04:46:29,659 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_stop [2023-11-19 04:46:29,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 04:46:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:46:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 04:46:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_write [2023-11-19 04:46:29,660 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_write [2023-11-19 04:46:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_update_timeout [2023-11-19 04:46:29,661 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_update_timeout [2023-11-19 04:46:29,661 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-19 04:46:29,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-19 04:46:29,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:46:29,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-19 04:46:29,662 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-19 04:46:29,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:46:29,662 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_round_time [2023-11-19 04:46:29,662 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_round_time [2023-11-19 04:46:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_reboot_notifier [2023-11-19 04:46:29,663 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_reboot_notifier [2023-11-19 04:46:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-19 04:46:29,663 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-19 04:46:29,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:46:29,664 INFO L130 BoogieDeclarations]: Found specification of procedure superio_exit [2023-11-19 04:46:29,664 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_exit [2023-11-19 04:46:29,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:46:29,664 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2023-11-19 04:46:29,664 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2023-11-19 04:46:29,665 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 04:46:29,665 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 04:46:29,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:46:29,665 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2023-11-19 04:46:29,666 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2023-11-19 04:46:29,666 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 04:46:29,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 04:46:29,666 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_start [2023-11-19 04:46:29,666 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_start [2023-11-19 04:46:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure superio_select [2023-11-19 04:46:29,667 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_select [2023-11-19 04:46:29,667 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-11-19 04:46:29,667 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-11-19 04:46:29,668 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2023-11-19 04:46:29,668 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2023-11-19 04:46:29,668 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-11-19 04:46:29,668 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-11-19 04:46:29,668 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-11-19 04:46:29,669 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-11-19 04:46:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure superio_enter [2023-11-19 04:46:29,669 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_enter [2023-11-19 04:46:29,669 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-19 04:46:29,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-19 04:46:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:46:29,670 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:46:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:46:29,670 INFO L130 BoogieDeclarations]: Found specification of procedure wdt_keepalive [2023-11-19 04:46:29,670 INFO L138 BoogieDeclarations]: Found implementation of procedure wdt_keepalive [2023-11-19 04:46:29,671 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2023-11-19 04:46:29,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2023-11-19 04:46:29,671 INFO L130 BoogieDeclarations]: Found specification of procedure superio_inb [2023-11-19 04:46:29,671 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_inb [2023-11-19 04:46:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure superio_outb [2023-11-19 04:46:29,672 INFO L138 BoogieDeclarations]: Found implementation of procedure superio_outb [2023-11-19 04:46:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:46:29,672 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2023-11-19 04:46:29,672 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2023-11-19 04:46:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2023-11-19 04:46:29,673 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2023-11-19 04:46:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:46:29,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:46:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-19 04:46:29,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-19 04:46:30,010 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:46:30,013 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:46:30,324 INFO L767 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-19 04:46:31,935 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:46:32,404 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:46:32,404 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:46:32,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:46:32 BoogieIcfgContainer [2023-11-19 04:46:32,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:46:32,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:46:32,426 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:46:32,429 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:46:32,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:46:27" (1/3) ... [2023-11-19 04:46:32,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4790bc2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:46:32, skipping insertion in model container [2023-11-19 04:46:32,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:46:29" (2/3) ... [2023-11-19 04:46:32,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4790bc2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:46:32, skipping insertion in model container [2023-11-19 04:46:32,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:46:32" (3/3) ... [2023-11-19 04:46:32,435 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--watchdog--it87_wdt.ko-entry_point.cil.out.i [2023-11-19 04:46:32,456 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:46:32,456 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:46:32,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:46:32,560 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;@448a8272, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:46:32,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:46:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 498 states, 275 states have (on average 1.4) internal successors, (385), 307 states have internal predecessors, (385), 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) [2023-11-19 04:46:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-19 04:46:32,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:32,612 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, 1, 1] [2023-11-19 04:46:32,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:32,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:32,621 INFO L85 PathProgramCache]: Analyzing trace with hash 174400813, now seen corresponding path program 1 times [2023-11-19 04:46:32,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:32,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153218353] [2023-11-19 04:46:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:32,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-19 04:46:33,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:33,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153218353] [2023-11-19 04:46:33,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153218353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:33,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:33,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:46:33,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603300114] [2023-11-19 04:46:33,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:33,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:46:33,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:33,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:46:33,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:46:33,536 INFO L87 Difference]: Start difference. First operand has 498 states, 275 states have (on average 1.4) internal successors, (385), 307 states have internal predecessors, (385), 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) [2023-11-19 04:46:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:34,060 INFO L93 Difference]: Finished difference Result 971 states and 1492 transitions. [2023-11-19 04:46:34,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:46:34,063 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 [2023-11-19 04:46:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:34,089 INFO L225 Difference]: With dead ends: 971 [2023-11-19 04:46:34,089 INFO L226 Difference]: Without dead ends: 919 [2023-11-19 04:46:34,094 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 [2023-11-19 04:46:34,098 INFO L413 NwaCegarLoop]: 946 mSDtfsCounter, 723 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:34,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 1629 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:46:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2023-11-19 04:46:34,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 918. [2023-11-19 04:46:34,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 515 states have (on average 1.3864077669902912) internal successors, (714), 562 states have internal predecessors, (714), 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) [2023-11-19 04:46:34,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1403 transitions. [2023-11-19 04:46:34,331 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1403 transitions. Word has length 105 [2023-11-19 04:46:34,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:34,333 INFO L495 AbstractCegarLoop]: Abstraction has 918 states and 1403 transitions. [2023-11-19 04:46:34,333 INFO L496 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) [2023-11-19 04:46:34,334 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1403 transitions. [2023-11-19 04:46:34,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-19 04:46:34,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:34,347 INFO L195 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] [2023-11-19 04:46:34,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:46:34,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:34,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:34,349 INFO L85 PathProgramCache]: Analyzing trace with hash -429694597, now seen corresponding path program 1 times [2023-11-19 04:46:34,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:34,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062847662] [2023-11-19 04:46:34,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:34,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:34,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2023-11-19 04:46:34,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:34,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062847662] [2023-11-19 04:46:34,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062847662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:34,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:34,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:46:34,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441653984] [2023-11-19 04:46:34,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:34,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:46:34,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:34,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:46:34,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:46:34,779 INFO L87 Difference]: Start difference. First operand 918 states and 1403 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) [2023-11-19 04:46:35,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:35,403 INFO L93 Difference]: Finished difference Result 2240 states and 3407 transitions. [2023-11-19 04:46:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:46:35,404 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 [2023-11-19 04:46:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:35,416 INFO L225 Difference]: With dead ends: 2240 [2023-11-19 04:46:35,417 INFO L226 Difference]: Without dead ends: 1346 [2023-11-19 04:46:35,423 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 [2023-11-19 04:46:35,425 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 387 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:35,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 1349 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 04:46:35,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2023-11-19 04:46:35,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1340. [2023-11-19 04:46:35,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 739 states have (on average 1.3802435723951285) internal successors, (1020), 806 states have internal predecessors, (1020), 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) [2023-11-19 04:46:35,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2031 transitions. [2023-11-19 04:46:35,551 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2031 transitions. Word has length 147 [2023-11-19 04:46:35,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:35,552 INFO L495 AbstractCegarLoop]: Abstraction has 1340 states and 2031 transitions. [2023-11-19 04:46:35,552 INFO L496 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) [2023-11-19 04:46:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2031 transitions. [2023-11-19 04:46:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-11-19 04:46:35,561 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:35,562 INFO L195 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] [2023-11-19 04:46:35,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:46:35,562 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:35,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:35,563 INFO L85 PathProgramCache]: Analyzing trace with hash -488948973, now seen corresponding path program 1 times [2023-11-19 04:46:35,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:35,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944371565] [2023-11-19 04:46:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:35,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2023-11-19 04:46:36,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:36,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944371565] [2023-11-19 04:46:36,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944371565] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:36,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:36,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:46:36,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963907926] [2023-11-19 04:46:36,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:36,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:46:36,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:36,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:46:36,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:46:36,623 INFO L87 Difference]: Start difference. First operand 1340 states and 2031 transitions. Second operand has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2023-11-19 04:46:38,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:38,306 INFO L93 Difference]: Finished difference Result 2966 states and 4570 transitions. [2023-11-19 04:46:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:46:38,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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 308 [2023-11-19 04:46:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:38,325 INFO L225 Difference]: With dead ends: 2966 [2023-11-19 04:46:38,325 INFO L226 Difference]: Without dead ends: 1658 [2023-11-19 04:46:38,334 INFO L412 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 [2023-11-19 04:46:38,337 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 782 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:38,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 1087 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 04:46:38,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2023-11-19 04:46:38,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1610. [2023-11-19 04:46:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 873 states have (on average 1.3837342497136311) internal successors, (1208), 964 states have internal predecessors, (1208), 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) [2023-11-19 04:46:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2491 transitions. [2023-11-19 04:46:38,526 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2491 transitions. Word has length 308 [2023-11-19 04:46:38,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:38,527 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 2491 transitions. [2023-11-19 04:46:38,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.25) internal successors, (105), 4 states have internal predecessors, (105), 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) [2023-11-19 04:46:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2491 transitions. [2023-11-19 04:46:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2023-11-19 04:46:38,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:38,540 INFO L195 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] [2023-11-19 04:46:38,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:46:38,541 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:38,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:38,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1414546404, now seen corresponding path program 1 times [2023-11-19 04:46:38,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:38,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613578135] [2023-11-19 04:46:38,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:38,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 436 trivial. 0 not checked. [2023-11-19 04:46:39,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:39,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613578135] [2023-11-19 04:46:39,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613578135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:39,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:39,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:46:39,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581570106] [2023-11-19 04:46:39,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:39,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:46:39,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:39,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:46:39,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:46:39,058 INFO L87 Difference]: Start difference. First operand 1610 states and 2491 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, (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) [2023-11-19 04:46:40,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:40,200 INFO L93 Difference]: Finished difference Result 3188 states and 4940 transitions. [2023-11-19 04:46:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:46:40,201 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, (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 311 [2023-11-19 04:46:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:40,215 INFO L225 Difference]: With dead ends: 3188 [2023-11-19 04:46:40,215 INFO L226 Difference]: Without dead ends: 1610 [2023-11-19 04:46:40,223 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 [2023-11-19 04:46:40,227 INFO L413 NwaCegarLoop]: 704 mSDtfsCounter, 701 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:40,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [701 Valid, 704 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 04:46:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2023-11-19 04:46:40,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1610. [2023-11-19 04:46:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 873 states have (on average 1.3745704467353952) internal successors, (1200), 964 states have internal predecessors, (1200), 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) [2023-11-19 04:46:40,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2483 transitions. [2023-11-19 04:46:40,411 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2483 transitions. Word has length 311 [2023-11-19 04:46:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:40,413 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 2483 transitions. [2023-11-19 04:46:40,413 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, (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) [2023-11-19 04:46:40,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2483 transitions. [2023-11-19 04:46:40,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2023-11-19 04:46:40,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:40,424 INFO L195 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] [2023-11-19 04:46:40,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:46:40,425 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:40,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:40,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1735019552, now seen corresponding path program 1 times [2023-11-19 04:46:40,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:40,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236396402] [2023-11-19 04:46:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:40,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:40,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2023-11-19 04:46:41,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:41,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236396402] [2023-11-19 04:46:41,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236396402] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:46:41,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244730505] [2023-11-19 04:46:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:41,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:41,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:46:41,125 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:46:41,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:46:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:41,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 2165 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:46:41,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:46:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2023-11-19 04:46:42,364 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:46:42,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244730505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:42,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:46:42,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2023-11-19 04:46:42,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986931447] [2023-11-19 04:46:42,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:42,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:46:42,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:42,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:46:42,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:46:42,368 INFO L87 Difference]: Start difference. First operand 1610 states and 2483 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 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) [2023-11-19 04:46:42,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:42,887 INFO L93 Difference]: Finished difference Result 3188 states and 4924 transitions. [2023-11-19 04:46:42,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:46:42,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 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 316 [2023-11-19 04:46:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:42,902 INFO L225 Difference]: With dead ends: 3188 [2023-11-19 04:46:42,902 INFO L226 Difference]: Without dead ends: 1610 [2023-11-19 04:46:42,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:46:42,910 INFO L413 NwaCegarLoop]: 703 mSDtfsCounter, 585 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:42,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 703 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:46:42,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1610 states. [2023-11-19 04:46:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1610 to 1610. [2023-11-19 04:46:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 873 states have (on average 1.3722794959908362) internal successors, (1198), 964 states have internal predecessors, (1198), 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) [2023-11-19 04:46:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 2481 transitions. [2023-11-19 04:46:43,080 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 2481 transitions. Word has length 316 [2023-11-19 04:46:43,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:43,084 INFO L495 AbstractCegarLoop]: Abstraction has 1610 states and 2481 transitions. [2023-11-19 04:46:43,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 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) [2023-11-19 04:46:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 2481 transitions. [2023-11-19 04:46:43,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2023-11-19 04:46:43,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:43,096 INFO L195 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] [2023-11-19 04:46:43,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 04:46:43,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:43,312 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:43,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:43,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1429864151, now seen corresponding path program 1 times [2023-11-19 04:46:43,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:43,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096094743] [2023-11-19 04:46:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:43,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2023-11-19 04:46:44,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:44,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096094743] [2023-11-19 04:46:44,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096094743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:44,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:44,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:46:44,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122722696] [2023-11-19 04:46:44,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:44,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:46:44,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:44,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:46:44,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:46:44,077 INFO L87 Difference]: Start difference. First operand 1610 states and 2481 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2023-11-19 04:46:45,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:45,967 INFO L93 Difference]: Finished difference Result 3978 states and 6083 transitions. [2023-11-19 04:46:45,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:46:45,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) Word has length 321 [2023-11-19 04:46:45,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:45,991 INFO L225 Difference]: With dead ends: 3978 [2023-11-19 04:46:45,991 INFO L226 Difference]: Without dead ends: 2325 [2023-11-19 04:46:46,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:46:46,001 INFO L413 NwaCegarLoop]: 813 mSDtfsCounter, 632 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 2258 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:46,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [632 Valid, 2258 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-19 04:46:46,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2023-11-19 04:46:46,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 2270. [2023-11-19 04:46:46,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2270 states, 1272 states have (on average 1.3726415094339623) internal successors, (1746), 1389 states have internal predecessors, (1746), 847 states have call successors, (847), 151 states have call predecessors, (847), 150 states have return successors, (846), 824 states have call predecessors, (846), 846 states have call successors, (846) [2023-11-19 04:46:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 3439 transitions. [2023-11-19 04:46:46,276 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 3439 transitions. Word has length 321 [2023-11-19 04:46:46,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:46,277 INFO L495 AbstractCegarLoop]: Abstraction has 2270 states and 3439 transitions. [2023-11-19 04:46:46,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 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) [2023-11-19 04:46:46,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 3439 transitions. [2023-11-19 04:46:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2023-11-19 04:46:46,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:46,291 INFO L195 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, 3, 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] [2023-11-19 04:46:46,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:46:46,292 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:46,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:46,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1384111226, now seen corresponding path program 1 times [2023-11-19 04:46:46,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:46,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984093859] [2023-11-19 04:46:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:46,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2023-11-19 04:46:47,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:47,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984093859] [2023-11-19 04:46:47,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984093859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:47,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:46:47,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:46:47,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321632681] [2023-11-19 04:46:47,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:47,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:46:47,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:47,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:46:47,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:46:47,044 INFO L87 Difference]: Start difference. First operand 2270 states and 3439 transitions. Second operand has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2023-11-19 04:46:48,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:48,276 INFO L93 Difference]: Finished difference Result 4070 states and 6083 transitions. [2023-11-19 04:46:48,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:46:48,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) Word has length 329 [2023-11-19 04:46:48,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:48,291 INFO L225 Difference]: With dead ends: 4070 [2023-11-19 04:46:48,291 INFO L226 Difference]: Without dead ends: 1707 [2023-11-19 04:46:48,302 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 [2023-11-19 04:46:48,303 INFO L413 NwaCegarLoop]: 794 mSDtfsCounter, 454 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:48,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 1480 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 04:46:48,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2023-11-19 04:46:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1707. [2023-11-19 04:46:48,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1707 states, 986 states have (on average 1.3519269776876268) internal successors, (1333), 1063 states have internal predecessors, (1333), 577 states have call successors, (577), 144 states have call predecessors, (577), 143 states have return successors, (576), 560 states have call predecessors, (576), 576 states have call successors, (576) [2023-11-19 04:46:48,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2486 transitions. [2023-11-19 04:46:48,483 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2486 transitions. Word has length 329 [2023-11-19 04:46:48,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:48,484 INFO L495 AbstractCegarLoop]: Abstraction has 1707 states and 2486 transitions. [2023-11-19 04:46:48,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.0) internal successors, (116), 4 states have internal predecessors, (116), 3 states have call successors, (49), 2 states have call predecessors, (49), 1 states have return successors, (48), 3 states have call predecessors, (48), 3 states have call successors, (48) [2023-11-19 04:46:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2486 transitions. [2023-11-19 04:46:48,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-11-19 04:46:48,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:48,500 INFO L195 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:48,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:46:48,500 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:48,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:48,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1363004151, now seen corresponding path program 1 times [2023-11-19 04:46:48,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:48,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823764081] [2023-11-19 04:46:48,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:48,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:49,606 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2023-11-19 04:46:49,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:49,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823764081] [2023-11-19 04:46:49,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823764081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:46:49,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273044328] [2023-11-19 04:46:49,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:49,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:49,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:46:49,608 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:46:49,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:46:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:50,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 2229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:46:50,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:46:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2023-11-19 04:46:50,360 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:46:50,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273044328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:50,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:46:50,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-19 04:46:50,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908378567] [2023-11-19 04:46:50,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:50,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:46:50,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:50,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:46:50,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:46:50,363 INFO L87 Difference]: Start difference. First operand 1707 states and 2486 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 3 states have call predecessors, (52), 2 states have call successors, (52) [2023-11-19 04:46:51,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:51,741 INFO L93 Difference]: Finished difference Result 3358 states and 4906 transitions. [2023-11-19 04:46:51,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:46:51,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 3 states have call predecessors, (52), 2 states have call successors, (52) Word has length 332 [2023-11-19 04:46:51,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:51,760 INFO L225 Difference]: With dead ends: 3358 [2023-11-19 04:46:51,760 INFO L226 Difference]: Without dead ends: 1721 [2023-11-19 04:46:51,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:46:51,771 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 0 mSDsluCounter, 2012 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2686 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:51,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2686 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-19 04:46:51,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2023-11-19 04:46:51,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1709. [2023-11-19 04:46:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 987 states have (on average 1.3515704154002026) internal successors, (1334), 1065 states have internal predecessors, (1334), 577 states have call successors, (577), 144 states have call predecessors, (577), 144 states have return successors, (579), 560 states have call predecessors, (579), 576 states have call successors, (579) [2023-11-19 04:46:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 2490 transitions. [2023-11-19 04:46:51,954 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 2490 transitions. Word has length 332 [2023-11-19 04:46:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:51,954 INFO L495 AbstractCegarLoop]: Abstraction has 1709 states and 2490 transitions. [2023-11-19 04:46:51,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 4 states have internal predecessors, (128), 2 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 3 states have call predecessors, (52), 2 states have call successors, (52) [2023-11-19 04:46:51,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 2490 transitions. [2023-11-19 04:46:51,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2023-11-19 04:46:51,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:51,972 INFO L195 NwaCegarLoop]: trace histogram [17, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:52,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 04:46:52,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:52,186 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:52,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:52,187 INFO L85 PathProgramCache]: Analyzing trace with hash 583981950, now seen corresponding path program 1 times [2023-11-19 04:46:52,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:52,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933402165] [2023-11-19 04:46:52,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:52,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-11-19 04:46:53,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:53,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933402165] [2023-11-19 04:46:53,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933402165] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:46:53,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724393181] [2023-11-19 04:46:53,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:53,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:53,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:46:53,160 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:46:53,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 04:46:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:53,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 2272 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:46:53,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:46:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-11-19 04:46:53,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:46:53,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724393181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:46:53,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:46:53,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-11-19 04:46:53,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240666179] [2023-11-19 04:46:53,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:46:53,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:46:53,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:46:53,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:46:53,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:46:53,937 INFO L87 Difference]: Start difference. First operand 1709 states and 2490 transitions. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (59), 3 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-19 04:46:55,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:46:56,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:46:56,254 INFO L93 Difference]: Finished difference Result 3323 states and 4855 transitions. [2023-11-19 04:46:56,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:46:56,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (59), 3 states have call predecessors, (59), 2 states have call successors, (59) Word has length 345 [2023-11-19 04:46:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:46:56,270 INFO L225 Difference]: With dead ends: 3323 [2023-11-19 04:46:56,270 INFO L226 Difference]: Without dead ends: 1721 [2023-11-19 04:46:56,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:46:56,280 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 0 mSDsluCounter, 2012 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2686 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:46:56,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2686 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 04:46:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2023-11-19 04:46:56,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1709. [2023-11-19 04:46:56,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 987 states have (on average 1.3515704154002026) internal successors, (1334), 1065 states have internal predecessors, (1334), 577 states have call successors, (577), 144 states have call predecessors, (577), 144 states have return successors, (577), 560 states have call predecessors, (577), 576 states have call successors, (577) [2023-11-19 04:46:56,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 2488 transitions. [2023-11-19 04:46:56,471 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 2488 transitions. Word has length 345 [2023-11-19 04:46:56,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:46:56,472 INFO L495 AbstractCegarLoop]: Abstraction has 1709 states and 2488 transitions. [2023-11-19 04:46:56,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (59), 3 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-19 04:46:56,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 2488 transitions. [2023-11-19 04:46:56,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2023-11-19 04:46:56,488 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:46:56,488 INFO L195 NwaCegarLoop]: trace histogram [21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:46:56,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 04:46:56,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:56,710 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:46:56,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:46:56,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1019866799, now seen corresponding path program 2 times [2023-11-19 04:46:56,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:46:56,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324140293] [2023-11-19 04:46:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:46:56,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:46:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:46:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 717 trivial. 0 not checked. [2023-11-19 04:46:57,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:46:57,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324140293] [2023-11-19 04:46:57,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324140293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:46:57,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990582822] [2023-11-19 04:46:57,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:46:57,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:46:57,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:46:57,700 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:46:57,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 04:46:59,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 04:46:59,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:46:59,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:46:59,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:47:00,046 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2023-11-19 04:47:00,046 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:47:00,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990582822] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:00,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:47:00,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 11 [2023-11-19 04:47:00,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677392387] [2023-11-19 04:47:00,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:00,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:47:00,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:00,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:47:00,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-11-19 04:47:00,050 INFO L87 Difference]: Start difference. First operand 1709 states and 2488 transitions. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-19 04:47:02,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:02,292 INFO L93 Difference]: Finished difference Result 3134 states and 4597 transitions. [2023-11-19 04:47:02,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:47:02,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) Word has length 358 [2023-11-19 04:47:02,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:02,308 INFO L225 Difference]: With dead ends: 3134 [2023-11-19 04:47:02,308 INFO L226 Difference]: Without dead ends: 1765 [2023-11-19 04:47:02,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2023-11-19 04:47:02,316 INFO L413 NwaCegarLoop]: 670 mSDtfsCounter, 4 mSDsluCounter, 4012 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4682 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:02,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 4682 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-19 04:47:02,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2023-11-19 04:47:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1741. [2023-11-19 04:47:02,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1011 states have (on average 1.3432245301681502) internal successors, (1358), 1089 states have internal predecessors, (1358), 577 states have call successors, (577), 144 states have call predecessors, (577), 152 states have return successors, (606), 568 states have call predecessors, (606), 576 states have call successors, (606) [2023-11-19 04:47:02,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2541 transitions. [2023-11-19 04:47:02,472 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2541 transitions. Word has length 358 [2023-11-19 04:47:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:02,473 INFO L495 AbstractCegarLoop]: Abstraction has 1741 states and 2541 transitions. [2023-11-19 04:47:02,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 6 states have internal predecessors, (128), 2 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) [2023-11-19 04:47:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2541 transitions. [2023-11-19 04:47:02,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2023-11-19 04:47:02,486 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:02,486 INFO L195 NwaCegarLoop]: trace histogram [21, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:02,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 04:47:02,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 04:47:02,707 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:02,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:02,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2096348280, now seen corresponding path program 1 times [2023-11-19 04:47:02,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:02,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351248648] [2023-11-19 04:47:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:02,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:03,958 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2023-11-19 04:47:03,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:03,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351248648] [2023-11-19 04:47:03,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351248648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:47:03,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234650100] [2023-11-19 04:47:03,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:03,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:03,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:47:03,961 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:47:03,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 04:47:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:05,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 2353 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 04:47:05,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:47:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2023-11-19 04:47:05,117 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:47:05,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234650100] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:05,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:47:05,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2023-11-19 04:47:05,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020574439] [2023-11-19 04:47:05,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:05,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:47:05,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:05,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:47:05,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:47:05,123 INFO L87 Difference]: Start difference. First operand 1741 states and 2541 transitions. Second operand has 6 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 2 states have call successors, (67), 2 states have call predecessors, (67), 3 states have return successors, (67), 3 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-19 04:47:06,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:06,969 INFO L93 Difference]: Finished difference Result 3492 states and 5186 transitions. [2023-11-19 04:47:06,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:47:06,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 2 states have call successors, (67), 2 states have call predecessors, (67), 3 states have return successors, (67), 3 states have call predecessors, (67), 2 states have call successors, (67) Word has length 367 [2023-11-19 04:47:06,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:06,984 INFO L225 Difference]: With dead ends: 3492 [2023-11-19 04:47:06,984 INFO L226 Difference]: Without dead ends: 1783 [2023-11-19 04:47:06,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:47:06,993 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 3 mSDsluCounter, 2687 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 3360 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:06,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 3360 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-19 04:47:06,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2023-11-19 04:47:07,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1769. [2023-11-19 04:47:07,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1032 states have (on average 1.3362403100775193) internal successors, (1379), 1110 states have internal predecessors, (1379), 577 states have call successors, (577), 144 states have call predecessors, (577), 159 states have return successors, (617), 575 states have call predecessors, (617), 576 states have call successors, (617) [2023-11-19 04:47:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2573 transitions. [2023-11-19 04:47:07,135 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2573 transitions. Word has length 367 [2023-11-19 04:47:07,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:07,135 INFO L495 AbstractCegarLoop]: Abstraction has 1769 states and 2573 transitions. [2023-11-19 04:47:07,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 27.6) internal successors, (138), 5 states have internal predecessors, (138), 2 states have call successors, (67), 2 states have call predecessors, (67), 3 states have return successors, (67), 3 states have call predecessors, (67), 2 states have call successors, (67) [2023-11-19 04:47:07,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2573 transitions. [2023-11-19 04:47:07,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2023-11-19 04:47:07,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:07,148 INFO L195 NwaCegarLoop]: trace histogram [21, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:07,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:47:07,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:07,375 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:07,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:07,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2046669158, now seen corresponding path program 1 times [2023-11-19 04:47:07,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:07,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894837237] [2023-11-19 04:47:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:07,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 749 trivial. 0 not checked. [2023-11-19 04:47:08,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:47:08,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894837237] [2023-11-19 04:47:08,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894837237] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:47:08,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049888661] [2023-11-19 04:47:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:08,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:08,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:47:08,684 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:47:08,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 04:47:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:47:09,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 2403 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-19 04:47:09,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:47:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2023-11-19 04:47:09,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:47:09,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049888661] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:47:09,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 04:47:09,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-19 04:47:09,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313954248] [2023-11-19 04:47:09,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:47:09,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:47:09,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:47:09,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:47:09,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:47:09,938 INFO L87 Difference]: Start difference. First operand 1769 states and 2573 transitions. Second operand has 4 states, 3 states have (on average 41.333333333333336) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-19 04:47:11,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 04:47:11,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:47:11,921 INFO L93 Difference]: Finished difference Result 3522 states and 5131 transitions. [2023-11-19 04:47:11,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:47:11,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 41.333333333333336) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) Word has length 375 [2023-11-19 04:47:11,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:47:11,937 INFO L225 Difference]: With dead ends: 3522 [2023-11-19 04:47:11,938 INFO L226 Difference]: Without dead ends: 1770 [2023-11-19 04:47:11,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:47:11,947 INFO L413 NwaCegarLoop]: 674 mSDtfsCounter, 0 mSDsluCounter, 1334 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2008 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 04:47:11,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2008 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 04:47:11,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2023-11-19 04:47:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1770. [2023-11-19 04:47:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1770 states, 1033 states have (on average 1.3359148112294288) internal successors, (1380), 1111 states have internal predecessors, (1380), 577 states have call successors, (577), 144 states have call predecessors, (577), 159 states have return successors, (617), 575 states have call predecessors, (617), 576 states have call successors, (617) [2023-11-19 04:47:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1770 states to 1770 states and 2574 transitions. [2023-11-19 04:47:12,100 INFO L78 Accepts]: Start accepts. Automaton has 1770 states and 2574 transitions. Word has length 375 [2023-11-19 04:47:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:47:12,100 INFO L495 AbstractCegarLoop]: Abstraction has 1770 states and 2574 transitions. [2023-11-19 04:47:12,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 41.333333333333336) internal successors, (124), 4 states have internal predecessors, (124), 2 states have call successors, (60), 2 states have call predecessors, (60), 3 states have return successors, (59), 2 states have call predecessors, (59), 2 states have call successors, (59) [2023-11-19 04:47:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1770 states and 2574 transitions. [2023-11-19 04:47:12,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2023-11-19 04:47:12,112 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:47:12,113 INFO L195 NwaCegarLoop]: trace histogram [21, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:47:12,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 04:47:12,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3412d15e-465b-47ca-8187-3940f3fd989c/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:47:12,341 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:47:12,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:47:12,341 INFO L85 PathProgramCache]: Analyzing trace with hash 647097615, now seen corresponding path program 1 times [2023-11-19 04:47:12,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:47:12,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998029642] [2023-11-19 04:47:12,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:47:12,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:47:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat