./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d0954289a294fb2be404f98afcefa652a2fbf60d586d07e7d68c419183f4ff07 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:19:29,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:19:29,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:19:29,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:19:29,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:19:29,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:19:29,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:19:29,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:19:29,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:19:29,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:19:29,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:19:29,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:19:29,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:19:29,688 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:19:29,690 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:19:29,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:19:29,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:19:29,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:19:29,696 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:19:29,699 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:19:29,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:19:29,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:19:29,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:19:29,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:19:29,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:19:29,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:19:29,710 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:19:29,711 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:19:29,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:19:29,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:19:29,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:19:29,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:19:29,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:19:29,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:19:29,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:19:29,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:19:29,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:19:29,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:19:29,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:19:29,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:19:29,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:19:29,723 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 18:19:29,749 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:19:29,749 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:19:29,749 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:19:29,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:19:29,750 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:19:29,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:19:29,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:19:29,752 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:19:29,752 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:19:29,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:19:29,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:19:29,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:19:29,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:19:29,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:19:29,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:19:29,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:19:29,754 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:19:29,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:19:29,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:19:29,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:19:29,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:19:29,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:19:29,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:19:29,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:19:29,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:19:29,756 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:19:29,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:19:29,756 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:19:29,757 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:19:29,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:19:29,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:19:29,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0954289a294fb2be404f98afcefa652a2fbf60d586d07e7d68c419183f4ff07 [2021-11-13 18:19:30,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:19:30,035 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:19:30,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:19:30,039 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:19:30,040 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:19:30,042 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point.cil.out.i [2021-11-13 18:19:30,101 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/data/0f823cdf9/52567d6621254175bed4979a530a0aaf/FLAG5545e18e2 [2021-11-13 18:19:30,944 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:19:30,945 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point.cil.out.i [2021-11-13 18:19:30,995 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/data/0f823cdf9/52567d6621254175bed4979a530a0aaf/FLAG5545e18e2 [2021-11-13 18:19:31,435 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/data/0f823cdf9/52567d6621254175bed4979a530a0aaf [2021-11-13 18:19:31,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:19:31,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:19:31,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:19:31,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:19:31,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:19:31,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:19:31" (1/1) ... [2021-11-13 18:19:31,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75830ef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:31, skipping insertion in model container [2021-11-13 18:19:31,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:19:31" (1/1) ... [2021-11-13 18:19:31,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:19:31,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:19:32,127 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name writepages at C: (*writepages)(struct address_space___0 * , struct writeback_control * ) [3507] [2021-11-13 18:19:32,128 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name readpages at C: (*readpages)(struct file___0 *filp , struct address_space___0 *mapping , struct list_head *pages , unsigned int nr_pages ) [3509-3510] [2021-11-13 18:19:32,128 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name write_begin at C: (*write_begin)(struct file___0 * , struct address_space___0 *mapping , loff_t pos , unsigned int len , unsigned int flags , struct page **pagep , void **fsdata ) [3511-3513] [2021-11-13 18:19:32,128 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name write_end at C: (*write_end)(struct file___0 * , struct address_space___0 *mapping , loff_t pos , unsigned int len , unsigned int copied , struct page *page , void *fsdata ) [3514-3515] [2021-11-13 18:19:32,129 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name bmap at C: (*bmap)(struct address_space___0 * , sector_t ) [3516] [2021-11-13 18:19:32,129 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name get_xip_mem at C: (*get_xip_mem)(struct address_space___0 * , unsigned long , int , void ** , unsigned long * ) [3522-3523] [2021-11-13 18:19:32,130 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name migratepage at C: (*migratepage)(struct address_space___0 * , struct page * , struct page * ) [3524] [2021-11-13 18:19:32,130 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name error_remove_page at C: (*error_remove_page)(struct address_space___0 * , struct page * ) [3527] [2021-11-13 18:19:32,142 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name carrier_raised at C: (*carrier_raised)(struct tty_port___0 *port ) [3940] [2021-11-13 18:19:32,142 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name dtr_rts at C: (*dtr_rts)(struct tty_port___0 *port , int raise ) [3941] [2021-11-13 18:19:32,143 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name shutdown at C: (*shutdown)(struct tty_port___0 *port ) [3942] [2021-11-13 18:19:32,143 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name drop at C: (*drop)(struct tty_port___0 *port ) [3943] [2021-11-13 18:19:32,144 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name activate at C: (*activate)(struct tty_port___0 *port , struct tty_struct___0 *tty ) [3944] [2021-11-13 18:19:32,144 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name destruct at C: (*destruct)(struct tty_port___0 *port ) [3945] [2021-11-13 18:19:32,412 WARN L228 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_1ac68eb3-bf23-436b-8e51-327c3755afcc/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point.cil.out.i[130795,130808] [2021-11-13 18:19:32,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:19:32,985 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:19:33,099 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name writepages at C: (*writepages)(struct address_space___0 * , struct writeback_control * ) [3507] [2021-11-13 18:19:33,099 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name readpages at C: (*readpages)(struct file___0 *filp , struct address_space___0 *mapping , struct list_head *pages , unsigned int nr_pages ) [3509-3510] [2021-11-13 18:19:33,100 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name write_begin at C: (*write_begin)(struct file___0 * , struct address_space___0 *mapping , loff_t pos , unsigned int len , unsigned int flags , struct page **pagep , void **fsdata ) [3511-3513] [2021-11-13 18:19:33,100 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name write_end at C: (*write_end)(struct file___0 * , struct address_space___0 *mapping , loff_t pos , unsigned int len , unsigned int copied , struct page *page , void *fsdata ) [3514-3515] [2021-11-13 18:19:33,100 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name bmap at C: (*bmap)(struct address_space___0 * , sector_t ) [3516] [2021-11-13 18:19:33,101 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name get_xip_mem at C: (*get_xip_mem)(struct address_space___0 * , unsigned long , int , void ** , unsigned long * ) [3522-3523] [2021-11-13 18:19:33,101 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name migratepage at C: (*migratepage)(struct address_space___0 * , struct page * , struct page * ) [3524] [2021-11-13 18:19:33,102 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name error_remove_page at C: (*error_remove_page)(struct address_space___0 * , struct page * ) [3527] [2021-11-13 18:19:33,111 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name carrier_raised at C: (*carrier_raised)(struct tty_port___0 *port ) [3940] [2021-11-13 18:19:33,111 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name dtr_rts at C: (*dtr_rts)(struct tty_port___0 *port , int raise ) [3941] [2021-11-13 18:19:33,112 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name shutdown at C: (*shutdown)(struct tty_port___0 *port ) [3942] [2021-11-13 18:19:33,112 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name drop at C: (*drop)(struct tty_port___0 *port ) [3943] [2021-11-13 18:19:33,113 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name activate at C: (*activate)(struct tty_port___0 *port , struct tty_struct___0 *tty ) [3944] [2021-11-13 18:19:33,113 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name destruct at C: (*destruct)(struct tty_port___0 *port ) [3945] [2021-11-13 18:19:33,131 WARN L228 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_1ac68eb3-bf23-436b-8e51-327c3755afcc/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point.cil.out.i[130795,130808] [2021-11-13 18:19:33,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:19:33,424 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:19:33,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:33 WrapperNode [2021-11-13 18:19:33,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:19:33,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:19:33,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:19:33,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:19:33,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:33" (1/1) ... [2021-11-13 18:19:33,516 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:33" (1/1) ... [2021-11-13 18:19:33,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:19:33,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:19:33,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:19:33,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:19:33,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:33" (1/1) ... [2021-11-13 18:19:33,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:33" (1/1) ... [2021-11-13 18:19:33,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:33" (1/1) ... [2021-11-13 18:19:33,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:33" (1/1) ... [2021-11-13 18:19:33,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:33" (1/1) ... [2021-11-13 18:19:33,800 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:33" (1/1) ... [2021-11-13 18:19:33,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:33" (1/1) ... [2021-11-13 18:19:33,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:19:33,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:19:33,855 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:19:33,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:19:33,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:33" (1/1) ... [2021-11-13 18:19:33,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:19:33,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:19:33,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:19:33,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:19:33,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-13 18:19:33,952 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-13 18:19:33,953 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-13 18:19:33,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 18:19:33,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 18:19:33,953 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:19:33,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:19:33,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:19:33,954 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-13 18:19:33,954 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-13 18:19:33,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 18:19:33,954 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 18:19:33,954 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-13 18:19:33,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-13 18:19:33,955 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:19:33,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:19:33,955 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-13 18:19:33,955 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-13 18:19:33,955 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:19:33,955 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:19:33,956 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2021-11-13 18:19:33,956 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2021-11-13 18:19:33,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:19:33,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:19:33,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:19:33,957 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_tty [2021-11-13 18:19:33,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_tty [2021-11-13 18:19:33,957 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:19:33,958 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:19:33,958 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_1 [2021-11-13 18:19:33,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_1 [2021-11-13 18:19:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:19:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-11-13 18:19:33,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-11-13 18:19:33,960 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-11-13 18:19:33,961 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_tiocmset [2021-11-13 18:19:33,961 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_tiocmset [2021-11-13 18:19:33,961 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_tiocmget [2021-11-13 18:19:33,961 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_tiocmget [2021-11-13 18:19:33,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:19:33,962 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:19:33,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:19:33,962 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_ioctl [2021-11-13 18:19:33,962 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_ioctl [2021-11-13 18:19:33,962 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-13 18:19:33,962 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-13 18:19:33,963 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-11-13 18:19:33,963 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-11-13 18:19:33,963 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-13 18:19:33,963 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-13 18:19:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_write_room [2021-11-13 18:19:33,964 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_write_room [2021-11-13 18:19:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:19:33,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:19:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-11-13 18:19:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-11-13 18:19:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_init_termios [2021-11-13 18:19:33,965 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_init_termios [2021-11-13 18:19:33,965 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2021-11-13 18:19:33,966 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2021-11-13 18:19:33,966 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 18:19:33,966 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 18:19:33,966 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-13 18:19:33,967 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-13 18:19:33,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:19:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_set_termios [2021-11-13 18:19:33,968 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_set_termios [2021-11-13 18:19:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-13 18:19:33,968 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 18:19:33,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 18:19:33,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:19:33,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:19:35,236 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:19:38,282 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-11-13 18:19:43,349 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:19:43,349 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:19:43,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:19:43 BoogieIcfgContainer [2021-11-13 18:19:43,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:19:43,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:19:43,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:19:43,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:19:43,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:19:31" (1/3) ... [2021-11-13 18:19:43,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7141f865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:19:43, skipping insertion in model container [2021-11-13 18:19:43,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:19:33" (2/3) ... [2021-11-13 18:19:43,369 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7141f865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:19:43, skipping insertion in model container [2021-11-13 18:19:43,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:19:43" (3/3) ... [2021-11-13 18:19:43,371 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point.cil.out.i [2021-11-13 18:19:43,377 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:19:43,378 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:19:43,440 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:19:43,447 INFO L339 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:19:43,447 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:19:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 631 states, 491 states have (on average 1.4419551934826884) internal successors, (708), 500 states have internal predecessors, (708), 112 states have call successors, (112), 28 states have call predecessors, (112), 26 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-13 18:19:43,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:19:43,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:43,502 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:19:43,503 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:43,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:43,508 INFO L85 PathProgramCache]: Analyzing trace with hash -347898881, now seen corresponding path program 1 times [2021-11-13 18:19:43,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:43,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359508664] [2021-11-13 18:19:43,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:43,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:19:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:19:44,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:19:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:19:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:19:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 18:19:44,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:44,401 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 18:19:44,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:44,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359508664] [2021-11-13 18:19:44,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359508664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:44,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:44,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:19:44,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541320734] [2021-11-13 18:19:44,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:44,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:19:44,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:44,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:19:44,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:19:44,453 INFO L87 Difference]: Start difference. First operand has 631 states, 491 states have (on average 1.4419551934826884) internal successors, (708), 500 states have internal predecessors, (708), 112 states have call successors, (112), 28 states have call predecessors, (112), 26 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:19:46,517 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:49,673 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:50,348 INFO L93 Difference]: Finished difference Result 1386 states and 2121 transitions. [2021-11-13 18:19:50,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:19:50,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 58 [2021-11-13 18:19:50,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:50,395 INFO L225 Difference]: With dead ends: 1386 [2021-11-13 18:19:50,400 INFO L226 Difference]: Without dead ends: 729 [2021-11-13 18:19:50,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:19:50,431 INFO L933 BasicCegarLoop]: 957 mSDtfsCounter, 453 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 270 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5234.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 2264 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.95ms SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5632.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:50,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [475 Valid, 2264 Invalid, 696 Unknown, 0 Unchecked, 36.95ms Time], IncrementalHoareTripleChecker [270 Valid, 424 Invalid, 2 Unknown, 0 Unchecked, 5632.41ms Time] [2021-11-13 18:19:50,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-11-13 18:19:50,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 612. [2021-11-13 18:19:50,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 478 states have (on average 1.401673640167364) internal successors, (670), 480 states have internal predecessors, (670), 106 states have call successors, (106), 28 states have call predecessors, (106), 27 states have return successors, (105), 105 states have call predecessors, (105), 105 states have call successors, (105) [2021-11-13 18:19:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 881 transitions. [2021-11-13 18:19:50,598 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 881 transitions. Word has length 58 [2021-11-13 18:19:50,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:50,599 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 881 transitions. [2021-11-13 18:19:50,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:19:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 881 transitions. [2021-11-13 18:19:50,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-13 18:19:50,615 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:50,616 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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] [2021-11-13 18:19:50,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:19:50,616 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:50,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:50,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1116662580, now seen corresponding path program 1 times [2021-11-13 18:19:50,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:50,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143745875] [2021-11-13 18:19:50,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:50,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:50,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:19:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:50,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:19:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:51,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:19:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:51,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:19:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:51,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:19:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:51,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:19:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:51,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 18:19:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:51,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 18:19:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:51,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-13 18:19:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:51,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:19:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-13 18:19:51,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:51,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143745875] [2021-11-13 18:19:51,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143745875] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:51,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:51,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:19:51,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515601885] [2021-11-13 18:19:51,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:51,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:19:51,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:51,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:19:51,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:19:51,141 INFO L87 Difference]: Start difference. First operand 612 states and 881 transitions. Second operand has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:19:53,187 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:55,388 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:57,909 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:19:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:19:59,286 INFO L93 Difference]: Finished difference Result 1685 states and 2487 transitions. [2021-11-13 18:19:59,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:19:59,287 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 96 [2021-11-13 18:19:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:19:59,298 INFO L225 Difference]: With dead ends: 1685 [2021-11-13 18:19:59,299 INFO L226 Difference]: Without dead ends: 1093 [2021-11-13 18:19:59,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:19:59,303 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 961 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 434 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7381.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 2214 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 27.17ms SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7969.50ms IncrementalHoareTripleChecker+Time [2021-11-13 18:19:59,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 2214 Invalid, 978 Unknown, 0 Unchecked, 27.17ms Time], IncrementalHoareTripleChecker [434 Valid, 541 Invalid, 3 Unknown, 0 Unchecked, 7969.50ms Time] [2021-11-13 18:19:59,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2021-11-13 18:19:59,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 897. [2021-11-13 18:19:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 710 states have (on average 1.3816901408450704) internal successors, (981), 714 states have internal predecessors, (981), 139 states have call successors, (139), 45 states have call predecessors, (139), 47 states have return successors, (153), 140 states have call predecessors, (153), 138 states have call successors, (153) [2021-11-13 18:19:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1273 transitions. [2021-11-13 18:19:59,375 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1273 transitions. Word has length 96 [2021-11-13 18:19:59,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:19:59,376 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1273 transitions. [2021-11-13 18:19:59,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.0) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 18:19:59,376 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1273 transitions. [2021-11-13 18:19:59,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 18:19:59,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:19:59,381 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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] [2021-11-13 18:19:59,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:19:59,382 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:19:59,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:19:59,382 INFO L85 PathProgramCache]: Analyzing trace with hash -753305297, now seen corresponding path program 1 times [2021-11-13 18:19:59,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:19:59,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012082172] [2021-11-13 18:19:59,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:19:59,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:19:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:59,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:19:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:59,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:19:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:59,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:19:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:59,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:19:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:59,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:19:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:59,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:19:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:59,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 18:19:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:59,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 18:19:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:59,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-13 18:19:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:59,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:19:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:59,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:19:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:19:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-13 18:19:59,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:19:59,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012082172] [2021-11-13 18:19:59,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012082172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:19:59,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:19:59,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:19:59,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720759537] [2021-11-13 18:19:59,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:19:59,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:19:59,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:19:59,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:19:59,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:19:59,814 INFO L87 Difference]: Start difference. First operand 897 states and 1273 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 18:20:01,861 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:04,035 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:06,392 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:07,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:07,837 INFO L93 Difference]: Finished difference Result 1971 states and 2858 transitions. [2021-11-13 18:20:07,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:20:07,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 106 [2021-11-13 18:20:07,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:07,848 INFO L225 Difference]: With dead ends: 1971 [2021-11-13 18:20:07,848 INFO L226 Difference]: Without dead ends: 1094 [2021-11-13 18:20:07,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:20:07,854 INFO L933 BasicCegarLoop]: 890 mSDtfsCounter, 165 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 122 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7386.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2666 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.87ms SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7893.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:07,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 2666 Invalid, 685 Unknown, 0 Unchecked, 22.87ms Time], IncrementalHoareTripleChecker [122 Valid, 560 Invalid, 3 Unknown, 0 Unchecked, 7893.00ms Time] [2021-11-13 18:20:07,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-11-13 18:20:07,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 898. [2021-11-13 18:20:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 711 states have (on average 1.3811533052039382) internal successors, (982), 715 states have internal predecessors, (982), 139 states have call successors, (139), 45 states have call predecessors, (139), 47 states have return successors, (153), 140 states have call predecessors, (153), 138 states have call successors, (153) [2021-11-13 18:20:07,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1274 transitions. [2021-11-13 18:20:07,915 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1274 transitions. Word has length 106 [2021-11-13 18:20:07,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:07,916 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1274 transitions. [2021-11-13 18:20:07,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 18:20:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1274 transitions. [2021-11-13 18:20:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 18:20:07,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:07,919 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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] [2021-11-13 18:20:07,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:20:07,920 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1021702065, now seen corresponding path program 1 times [2021-11-13 18:20:07,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:07,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974150959] [2021-11-13 18:20:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:07,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:08,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:08,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:20:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:08,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:20:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:08,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:20:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:08,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:20:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:08,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:20:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:08,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 18:20:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:08,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-11-13 18:20:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:08,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-13 18:20:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:08,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:20:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:08,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:08,726 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-13 18:20:08,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:08,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974150959] [2021-11-13 18:20:08,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974150959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:20:08,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420294187] [2021-11-13 18:20:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:08,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:20:08,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:20:08,730 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:20:08,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:20:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:09,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:20:09,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:20:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:20:09,806 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:20:09,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420294187] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:09,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:20:09,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-11-13 18:20:09,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703343054] [2021-11-13 18:20:09,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:09,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:20:09,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:09,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:20:09,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:20:09,809 INFO L87 Difference]: Start difference. First operand 898 states and 1274 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:20:11,859 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:12,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:12,203 INFO L93 Difference]: Finished difference Result 2648 states and 3757 transitions. [2021-11-13 18:20:12,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:20:12,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 106 [2021-11-13 18:20:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:12,221 INFO L225 Difference]: With dead ends: 2648 [2021-11-13 18:20:12,222 INFO L226 Difference]: Without dead ends: 1731 [2021-11-13 18:20:12,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:20:12,230 INFO L933 BasicCegarLoop]: 1570 mSDtfsCounter, 771 mSDsluCounter, 3922 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2086.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 5492 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.53ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2254.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:12,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 5492 Invalid, 32 Unknown, 0 Unchecked, 14.53ms Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 1 Unknown, 0 Unchecked, 2254.99ms Time] [2021-11-13 18:20:12,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2021-11-13 18:20:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1710. [2021-11-13 18:20:12,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 1361 states have (on average 1.3864805290227773) internal successors, (1887), 1366 states have internal predecessors, (1887), 261 states have call successors, (261), 82 states have call predecessors, (261), 87 states have return successors, (290), 261 states have call predecessors, (290), 260 states have call successors, (290) [2021-11-13 18:20:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2438 transitions. [2021-11-13 18:20:12,335 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2438 transitions. Word has length 106 [2021-11-13 18:20:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:12,335 INFO L470 AbstractCegarLoop]: Abstraction has 1710 states and 2438 transitions. [2021-11-13 18:20:12,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:20:12,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2438 transitions. [2021-11-13 18:20:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-13 18:20:12,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:12,346 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-11-13 18:20:12,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:20:12,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:20:12,559 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:12,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:12,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2014336604, now seen corresponding path program 1 times [2021-11-13 18:20:12,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:12,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740236895] [2021-11-13 18:20:12,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:12,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:12,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:12,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:20:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:12,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:20:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:12,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:20:13,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:13,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:20:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:13,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:20:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:13,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:20:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:13,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:20:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:13,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:20:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:13,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:20:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:13,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-13 18:20:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:13,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-13 18:20:13,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:13,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740236895] [2021-11-13 18:20:13,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740236895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:20:13,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720037666] [2021-11-13 18:20:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:13,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:20:13,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:20:13,175 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:20:13,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:20:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:20,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:20:20,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:20:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:20:20,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:20:20,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720037666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:20,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:20:20,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-11-13 18:20:20,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819706055] [2021-11-13 18:20:20,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:20,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:20:20,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:20,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:20:20,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:20:20,662 INFO L87 Difference]: Start difference. First operand 1710 states and 2438 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:20:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:20,851 INFO L93 Difference]: Finished difference Result 3420 states and 4872 transitions. [2021-11-13 18:20:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:20:20,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) Word has length 116 [2021-11-13 18:20:20,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:20,865 INFO L225 Difference]: With dead ends: 3420 [2021-11-13 18:20:20,865 INFO L226 Difference]: Without dead ends: 1725 [2021-11-13 18:20:20,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:20:20,872 INFO L933 BasicCegarLoop]: 799 mSDtfsCounter, 34 mSDsluCounter, 2372 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3171 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.90ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:20,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 3171 Invalid, 11 Unknown, 0 Unchecked, 7.90ms Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 67.79ms Time] [2021-11-13 18:20:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-11-13 18:20:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1682. [2021-11-13 18:20:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1334 states have (on average 1.383808095952024) internal successors, (1846), 1338 states have internal predecessors, (1846), 260 states have call successors, (260), 82 states have call predecessors, (260), 87 states have return successors, (289), 261 states have call predecessors, (289), 259 states have call successors, (289) [2021-11-13 18:20:20,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2395 transitions. [2021-11-13 18:20:20,960 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2395 transitions. Word has length 116 [2021-11-13 18:20:20,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:20,961 INFO L470 AbstractCegarLoop]: Abstraction has 1682 states and 2395 transitions. [2021-11-13 18:20:20,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (12), 3 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:20:20,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2395 transitions. [2021-11-13 18:20:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 18:20:20,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:20,964 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-11-13 18:20:21,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:20:21,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:20:21,165 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:21,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:21,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1805196374, now seen corresponding path program 1 times [2021-11-13 18:20:21,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:21,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077990285] [2021-11-13 18:20:21,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:21,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:21,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:21,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:20:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:21,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:20:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:21,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:20:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:21,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:20:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:21,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:21,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:20:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:21,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:20:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:21,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:20:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:21,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:20:21,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:22,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:20:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:22,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-11-13 18:20:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:22,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:20:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-13 18:20:22,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:22,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077990285] [2021-11-13 18:20:22,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077990285] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:20:22,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778333481] [2021-11-13 18:20:22,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:22,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:20:22,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:20:22,039 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:20:22,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:20:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:28,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 1908 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:20:28,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:20:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:20:29,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:20:29,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778333481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:29,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:20:29,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 13 [2021-11-13 18:20:29,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866300671] [2021-11-13 18:20:29,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:29,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:20:29,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:29,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:20:29,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:20:29,037 INFO L87 Difference]: Start difference. First operand 1682 states and 2395 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 18:20:31,088 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:31,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:31,450 INFO L93 Difference]: Finished difference Result 3293 states and 4702 transitions. [2021-11-13 18:20:31,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:20:31,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 122 [2021-11-13 18:20:31,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:31,476 INFO L225 Difference]: With dead ends: 3293 [2021-11-13 18:20:31,476 INFO L226 Difference]: Without dead ends: 3290 [2021-11-13 18:20:31,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:20:31,480 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 683 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2058.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.08ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2223.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:31,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 1694 Invalid, 6 Unknown, 0 Unchecked, 6.08ms Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 1 Unknown, 0 Unchecked, 2223.53ms Time] [2021-11-13 18:20:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2021-11-13 18:20:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 3286. [2021-11-13 18:20:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 2610 states have (on average 1.3888888888888888) internal successors, (3625), 2620 states have internal predecessors, (3625), 504 states have call successors, (504), 160 states have call predecessors, (504), 171 states have return successors, (563), 505 states have call predecessors, (563), 503 states have call successors, (563) [2021-11-13 18:20:31,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4692 transitions. [2021-11-13 18:20:31,663 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4692 transitions. Word has length 122 [2021-11-13 18:20:31,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:31,665 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4692 transitions. [2021-11-13 18:20:31,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 18:20:31,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4692 transitions. [2021-11-13 18:20:31,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 18:20:31,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:31,670 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 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] [2021-11-13 18:20:31,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:20:31,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-13 18:20:31,885 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:31,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1094914055, now seen corresponding path program 1 times [2021-11-13 18:20:31,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:31,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665947503] [2021-11-13 18:20:31,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:31,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:32,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:32,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:20:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:32,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:20:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:32,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:20:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:32,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:20:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:32,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:32,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:20:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:32,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:20:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:32,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:20:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:32,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:20:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:32,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:20:32,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:32,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-13 18:20:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-13 18:20:32,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:32,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665947503] [2021-11-13 18:20:32,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665947503] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:32,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:32,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:20:32,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806041104] [2021-11-13 18:20:32,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:32,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:20:32,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:32,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:20:32,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:20:32,191 INFO L87 Difference]: Start difference. First operand 3286 states and 4692 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:20:34,239 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:36,351 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:38,826 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:40,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:40,400 INFO L93 Difference]: Finished difference Result 8726 states and 12727 transitions. [2021-11-13 18:20:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:20:40,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 131 [2021-11-13 18:20:40,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:40,440 INFO L225 Difference]: With dead ends: 8726 [2021-11-13 18:20:40,440 INFO L226 Difference]: Without dead ends: 5471 [2021-11-13 18:20:40,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:20:40,453 INFO L933 BasicCegarLoop]: 1130 mSDtfsCounter, 815 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 373 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7446.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 2430 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.10ms SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7934.72ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:40,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [852 Valid, 2430 Invalid, 919 Unknown, 0 Unchecked, 21.10ms Time], IncrementalHoareTripleChecker [373 Valid, 543 Invalid, 3 Unknown, 0 Unchecked, 7934.72ms Time] [2021-11-13 18:20:40,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5471 states. [2021-11-13 18:20:40,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5471 to 4258. [2021-11-13 18:20:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4258 states, 3406 states have (on average 1.3778625954198473) internal successors, (4693), 3418 states have internal predecessors, (4693), 616 states have call successors, (616), 224 states have call predecessors, (616), 235 states have return successors, (671), 615 states have call predecessors, (671), 615 states have call successors, (671) [2021-11-13 18:20:40,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4258 states to 4258 states and 5980 transitions. [2021-11-13 18:20:40,709 INFO L78 Accepts]: Start accepts. Automaton has 4258 states and 5980 transitions. Word has length 131 [2021-11-13 18:20:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:40,710 INFO L470 AbstractCegarLoop]: Abstraction has 4258 states and 5980 transitions. [2021-11-13 18:20:40,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:20:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 4258 states and 5980 transitions. [2021-11-13 18:20:40,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-13 18:20:40,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:40,717 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:20:40,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:20:40,717 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:40,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:40,718 INFO L85 PathProgramCache]: Analyzing trace with hash -460762236, now seen corresponding path program 1 times [2021-11-13 18:20:40,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:40,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203413700] [2021-11-13 18:20:40,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:40,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:40,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:40,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:20:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:40,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:20:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:40,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:20:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:40,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:20:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:40,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:40,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:20:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:40,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:20:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:40,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:20:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:40,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:20:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:41,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:20:41,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:41,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-13 18:20:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:41,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:20:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:41,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-13 18:20:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-11-13 18:20:41,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:41,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203413700] [2021-11-13 18:20:41,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203413700] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:41,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:41,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:20:41,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386611221] [2021-11-13 18:20:41,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:41,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:20:41,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:41,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:20:41,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:20:41,043 INFO L87 Difference]: Start difference. First operand 4258 states and 5980 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:20:43,089 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:45,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:47,336 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:49,733 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:52,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:20:52,738 INFO L93 Difference]: Finished difference Result 12844 states and 18333 transitions. [2021-11-13 18:20:52,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:20:52,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 154 [2021-11-13 18:20:52,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:20:52,804 INFO L225 Difference]: With dead ends: 12844 [2021-11-13 18:20:52,804 INFO L226 Difference]: Without dead ends: 8617 [2021-11-13 18:20:52,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:20:52,822 INFO L933 BasicCegarLoop]: 1313 mSDtfsCounter, 810 mSDsluCounter, 3206 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 254 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10432.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 4519 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.27ms SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11287.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:20:52,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [842 Valid, 4519 Invalid, 1428 Unknown, 0 Unchecked, 33.27ms Time], IncrementalHoareTripleChecker [254 Valid, 1170 Invalid, 4 Unknown, 0 Unchecked, 11287.86ms Time] [2021-11-13 18:20:52,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8617 states. [2021-11-13 18:20:53,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8617 to 4266. [2021-11-13 18:20:53,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4266 states, 3414 states have (on average 1.3769771528998243) internal successors, (4701), 3426 states have internal predecessors, (4701), 616 states have call successors, (616), 224 states have call predecessors, (616), 235 states have return successors, (671), 615 states have call predecessors, (671), 615 states have call successors, (671) [2021-11-13 18:20:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4266 states to 4266 states and 5988 transitions. [2021-11-13 18:20:53,190 INFO L78 Accepts]: Start accepts. Automaton has 4266 states and 5988 transitions. Word has length 154 [2021-11-13 18:20:53,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:20:53,191 INFO L470 AbstractCegarLoop]: Abstraction has 4266 states and 5988 transitions. [2021-11-13 18:20:53,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:20:53,191 INFO L276 IsEmpty]: Start isEmpty. Operand 4266 states and 5988 transitions. [2021-11-13 18:20:53,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-13 18:20:53,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:20:53,197 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:20:53,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:20:53,198 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:20:53,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:20:53,199 INFO L85 PathProgramCache]: Analyzing trace with hash 209813474, now seen corresponding path program 1 times [2021-11-13 18:20:53,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:20:53,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377227668] [2021-11-13 18:20:53,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:20:53,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:20:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:20:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:20:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:20:53,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:20:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:20:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:20:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:20:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:20:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:20:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:20:53,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-13 18:20:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:20:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-13 18:20:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:20:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-11-13 18:20:53,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:20:53,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377227668] [2021-11-13 18:20:53,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377227668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:20:53,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:20:53,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:20:53,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86820802] [2021-11-13 18:20:53,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:20:53,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:20:53,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:20:53,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:20:53,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:20:53,502 INFO L87 Difference]: Start difference. First operand 4266 states and 5988 transitions. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:20:55,549 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:57,690 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:20:59,809 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:02,222 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:04,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:04,655 INFO L93 Difference]: Finished difference Result 11158 states and 16023 transitions. [2021-11-13 18:21:04,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:21:04,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 160 [2021-11-13 18:21:04,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:04,714 INFO L225 Difference]: With dead ends: 11158 [2021-11-13 18:21:04,715 INFO L226 Difference]: Without dead ends: 6923 [2021-11-13 18:21:04,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:04,732 INFO L933 BasicCegarLoop]: 1267 mSDtfsCounter, 580 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 222 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10130.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 3057 SdHoareTripleChecker+Invalid, 1190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.46ms SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10841.83ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:04,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 3057 Invalid, 1190 Unknown, 0 Unchecked, 20.46ms Time], IncrementalHoareTripleChecker [222 Valid, 964 Invalid, 4 Unknown, 0 Unchecked, 10841.83ms Time] [2021-11-13 18:21:04,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6923 states. [2021-11-13 18:21:05,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6923 to 5274. [2021-11-13 18:21:05,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5274 states, 4234 states have (on average 1.3682097307510628) internal successors, (5793), 4248 states have internal predecessors, (5793), 728 states have call successors, (728), 300 states have call predecessors, (728), 311 states have return successors, (775), 725 states have call predecessors, (775), 727 states have call successors, (775) [2021-11-13 18:21:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5274 states to 5274 states and 7296 transitions. [2021-11-13 18:21:05,180 INFO L78 Accepts]: Start accepts. Automaton has 5274 states and 7296 transitions. Word has length 160 [2021-11-13 18:21:05,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:05,181 INFO L470 AbstractCegarLoop]: Abstraction has 5274 states and 7296 transitions. [2021-11-13 18:21:05,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 3 states have internal predecessors, (96), 2 states have call successors, (16), 4 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:21:05,182 INFO L276 IsEmpty]: Start isEmpty. Operand 5274 states and 7296 transitions. [2021-11-13 18:21:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-13 18:21:05,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:05,193 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:05,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:21:05,193 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:05,194 INFO L85 PathProgramCache]: Analyzing trace with hash -26043950, now seen corresponding path program 1 times [2021-11-13 18:21:05,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:05,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712997616] [2021-11-13 18:21:05,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:05,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:21:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:21:05,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:21:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:21:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:05,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:21:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:21:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:21:05,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:21:05,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:21:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-13 18:21:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-13 18:21:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 18:21:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-11-13 18:21:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-13 18:21:05,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:05,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712997616] [2021-11-13 18:21:05,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712997616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:05,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:05,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:21:05,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251877168] [2021-11-13 18:21:05,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:05,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:21:05,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:05,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:21:05,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:21:05,634 INFO L87 Difference]: Start difference. First operand 5274 states and 7296 transitions. Second operand has 5 states, 5 states have (on average 22.2) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-13 18:21:07,681 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:09,791 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:12,113 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:13,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:13,532 INFO L93 Difference]: Finished difference Result 12163 states and 17241 transitions. [2021-11-13 18:21:13,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:21:13,533 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 205 [2021-11-13 18:21:13,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:13,571 INFO L225 Difference]: With dead ends: 12163 [2021-11-13 18:21:13,571 INFO L226 Difference]: Without dead ends: 6920 [2021-11-13 18:21:13,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:21:13,588 INFO L933 BasicCegarLoop]: 787 mSDtfsCounter, 859 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 205 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7130.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1692 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.78ms SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7658.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:13,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 1692 Invalid, 685 Unknown, 0 Unchecked, 10.78ms Time], IncrementalHoareTripleChecker [205 Valid, 477 Invalid, 3 Unknown, 0 Unchecked, 7658.33ms Time] [2021-11-13 18:21:13,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6920 states. [2021-11-13 18:21:13,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6920 to 5150. [2021-11-13 18:21:13,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5150 states, 4134 states have (on average 1.322447992259313) internal successors, (5467), 4148 states have internal predecessors, (5467), 712 states have call successors, (712), 300 states have call predecessors, (712), 303 states have return successors, (727), 701 states have call predecessors, (727), 711 states have call successors, (727) [2021-11-13 18:21:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5150 states to 5150 states and 6906 transitions. [2021-11-13 18:21:13,860 INFO L78 Accepts]: Start accepts. Automaton has 5150 states and 6906 transitions. Word has length 205 [2021-11-13 18:21:13,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:13,861 INFO L470 AbstractCegarLoop]: Abstraction has 5150 states and 6906 transitions. [2021-11-13 18:21:13,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.2) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-13 18:21:13,861 INFO L276 IsEmpty]: Start isEmpty. Operand 5150 states and 6906 transitions. [2021-11-13 18:21:13,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-13 18:21:13,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:13,871 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:21:13,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:21:13,872 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:13,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:13,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1053692074, now seen corresponding path program 1 times [2021-11-13 18:21:13,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:13,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016010186] [2021-11-13 18:21:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:13,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:13,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:21:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:21:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:21:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:21:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:21:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:21:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:21:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:21:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:21:14,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-13 18:21:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-13 18:21:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 18:21:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2021-11-13 18:21:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-13 18:21:14,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:14,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016010186] [2021-11-13 18:21:14,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016010186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:14,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:14,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:21:14,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2855176] [2021-11-13 18:21:14,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:14,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:21:14,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:14,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:21:14,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:21:14,265 INFO L87 Difference]: Start difference. First operand 5150 states and 6906 transitions. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 18:21:16,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:18,443 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:20,812 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:22,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:22,769 INFO L93 Difference]: Finished difference Result 16956 states and 23257 transitions. [2021-11-13 18:21:22,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:21:22,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 205 [2021-11-13 18:21:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:22,820 INFO L225 Difference]: With dead ends: 16956 [2021-11-13 18:21:22,820 INFO L226 Difference]: Without dead ends: 11837 [2021-11-13 18:21:22,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:21:22,837 INFO L933 BasicCegarLoop]: 1452 mSDtfsCounter, 1068 mSDsluCounter, 2687 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 401 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7569.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1109 SdHoareTripleChecker+Valid, 4139 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.22ms SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8150.92ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:22,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1109 Valid, 4139 Invalid, 1197 Unknown, 0 Unchecked, 17.22ms Time], IncrementalHoareTripleChecker [401 Valid, 793 Invalid, 3 Unknown, 0 Unchecked, 8150.92ms Time] [2021-11-13 18:21:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11837 states. [2021-11-13 18:21:23,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11837 to 5158. [2021-11-13 18:21:23,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5158 states, 4142 states have (on average 1.321825205214872) internal successors, (5475), 4156 states have internal predecessors, (5475), 712 states have call successors, (712), 300 states have call predecessors, (712), 303 states have return successors, (727), 701 states have call predecessors, (727), 711 states have call successors, (727) [2021-11-13 18:21:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5158 states to 5158 states and 6914 transitions. [2021-11-13 18:21:23,261 INFO L78 Accepts]: Start accepts. Automaton has 5158 states and 6914 transitions. Word has length 205 [2021-11-13 18:21:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:23,262 INFO L470 AbstractCegarLoop]: Abstraction has 5158 states and 6914 transitions. [2021-11-13 18:21:23,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (20), 4 states have call predecessors, (20), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 18:21:23,262 INFO L276 IsEmpty]: Start isEmpty. Operand 5158 states and 6914 transitions. [2021-11-13 18:21:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-13 18:21:23,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:23,276 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 18:21:23,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:21:23,276 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:23,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:23,277 INFO L85 PathProgramCache]: Analyzing trace with hash 825541969, now seen corresponding path program 1 times [2021-11-13 18:21:23,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:23,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869690138] [2021-11-13 18:21:23,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:23,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:23,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:21:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:21:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:21:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:21:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:21:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:21:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:21:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:21:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:21:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-13 18:21:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-13 18:21:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 18:21:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:23,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-13 18:21:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-13 18:21:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-11-13 18:21:23,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-11-13 18:21:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-11-13 18:21:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-11-13 18:21:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2021-11-13 18:21:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:23,842 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-11-13 18:21:23,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:23,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869690138] [2021-11-13 18:21:23,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869690138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:23,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:23,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:21:23,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240866564] [2021-11-13 18:21:23,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:23,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:21:23,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:23,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:21:23,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:21:23,846 INFO L87 Difference]: Start difference. First operand 5158 states and 6914 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (26), 5 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 18:21:25,893 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:28,179 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:29,215 INFO L93 Difference]: Finished difference Result 12059 states and 16521 transitions. [2021-11-13 18:21:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:21:29,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (26), 5 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 260 [2021-11-13 18:21:29,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:29,241 INFO L225 Difference]: With dead ends: 12059 [2021-11-13 18:21:29,241 INFO L226 Difference]: Without dead ends: 6932 [2021-11-13 18:21:29,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:21:29,254 INFO L933 BasicCegarLoop]: 834 mSDtfsCounter, 312 mSDsluCounter, 1263 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 260 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4800.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.30ms SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5101.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:29,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 2097 Invalid, 571 Unknown, 0 Unchecked, 8.30ms Time], IncrementalHoareTripleChecker [260 Valid, 309 Invalid, 2 Unknown, 0 Unchecked, 5101.73ms Time] [2021-11-13 18:21:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2021-11-13 18:21:29,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 5162. [2021-11-13 18:21:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5162 states, 4146 states have (on average 1.3215147129763627) internal successors, (5479), 4160 states have internal predecessors, (5479), 712 states have call successors, (712), 300 states have call predecessors, (712), 303 states have return successors, (727), 701 states have call predecessors, (727), 711 states have call successors, (727) [2021-11-13 18:21:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 6918 transitions. [2021-11-13 18:21:29,559 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 6918 transitions. Word has length 260 [2021-11-13 18:21:29,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:29,560 INFO L470 AbstractCegarLoop]: Abstraction has 5162 states and 6918 transitions. [2021-11-13 18:21:29,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (26), 5 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 18:21:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 6918 transitions. [2021-11-13 18:21:29,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-13 18:21:29,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:29,571 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 18:21:29,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:21:29,572 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:29,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash -203817329, now seen corresponding path program 1 times [2021-11-13 18:21:29,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:29,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733892996] [2021-11-13 18:21:29,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:29,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:21:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:21:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:21:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:21:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:21:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:21:29,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:21:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:21:29,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:21:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-13 18:21:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:29,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-13 18:21:29,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 18:21:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-13 18:21:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-13 18:21:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-11-13 18:21:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-11-13 18:21:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-11-13 18:21:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:29,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-11-13 18:21:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:30,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2021-11-13 18:21:30,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:30,012 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2021-11-13 18:21:30,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:30,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733892996] [2021-11-13 18:21:30,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733892996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:30,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:21:30,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:21:30,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041635373] [2021-11-13 18:21:30,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:30,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:21:30,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:30,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:21:30,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:21:30,018 INFO L87 Difference]: Start difference. First operand 5162 states and 6918 transitions. Second operand has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (26), 5 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 18:21:32,068 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:34,396 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:21:35,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:35,314 INFO L93 Difference]: Finished difference Result 12067 states and 16529 transitions. [2021-11-13 18:21:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:21:35,315 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (26), 5 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 260 [2021-11-13 18:21:35,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:35,338 INFO L225 Difference]: With dead ends: 12067 [2021-11-13 18:21:35,339 INFO L226 Difference]: Without dead ends: 6936 [2021-11-13 18:21:35,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:21:35,353 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 456 mSDsluCounter, 1248 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 366 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4777.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.27ms SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5103.12ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:35,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 2068 Invalid, 677 Unknown, 0 Unchecked, 7.27ms Time], IncrementalHoareTripleChecker [366 Valid, 309 Invalid, 2 Unknown, 0 Unchecked, 5103.12ms Time] [2021-11-13 18:21:35,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6936 states. [2021-11-13 18:21:35,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6936 to 5166. [2021-11-13 18:21:35,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5166 states, 4150 states have (on average 1.3212048192771084) internal successors, (5483), 4164 states have internal predecessors, (5483), 712 states have call successors, (712), 300 states have call predecessors, (712), 303 states have return successors, (727), 701 states have call predecessors, (727), 711 states have call successors, (727) [2021-11-13 18:21:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5166 states to 5166 states and 6922 transitions. [2021-11-13 18:21:35,686 INFO L78 Accepts]: Start accepts. Automaton has 5166 states and 6922 transitions. Word has length 260 [2021-11-13 18:21:35,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:35,688 INFO L470 AbstractCegarLoop]: Abstraction has 5166 states and 6922 transitions. [2021-11-13 18:21:35,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.166666666666668) internal successors, (139), 3 states have internal predecessors, (139), 2 states have call successors, (26), 5 states have call predecessors, (26), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 18:21:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 5166 states and 6922 transitions. [2021-11-13 18:21:35,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-13 18:21:35,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:35,699 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 18:21:35,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:21:35,701 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:35,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:35,702 INFO L85 PathProgramCache]: Analyzing trace with hash -276203887, now seen corresponding path program 1 times [2021-11-13 18:21:35,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:35,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481216767] [2021-11-13 18:21:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:35,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:21:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:21:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:21:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:21:36,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:21:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:21:36,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:21:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:21:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:21:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-13 18:21:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-11-13 18:21:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-11-13 18:21:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-13 18:21:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2021-11-13 18:21:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-11-13 18:21:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2021-11-13 18:21:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-11-13 18:21:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-11-13 18:21:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 245 [2021-11-13 18:21:36,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 31 proven. 16 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-13 18:21:36,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:36,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481216767] [2021-11-13 18:21:36,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481216767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:21:36,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570430910] [2021-11-13 18:21:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:36,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:21:36,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:21:36,489 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:21:36,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:21:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:49,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 2643 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-13 18:21:49,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:21:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2021-11-13 18:21:49,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:21:49,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570430910] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:21:49,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:21:49,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 11 [2021-11-13 18:21:49,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887403287] [2021-11-13 18:21:49,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:21:49,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:21:49,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:21:49,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:21:49,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:21:49,841 INFO L87 Difference]: Start difference. First operand 5166 states and 6922 transitions. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 6 states have internal predecessors, (152), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-13 18:21:50,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:21:50,275 INFO L93 Difference]: Finished difference Result 11219 states and 15082 transitions. [2021-11-13 18:21:50,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:21:50,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 6 states have internal predecessors, (152), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) Word has length 260 [2021-11-13 18:21:50,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:21:50,311 INFO L225 Difference]: With dead ends: 11219 [2021-11-13 18:21:50,312 INFO L226 Difference]: Without dead ends: 6084 [2021-11-13 18:21:50,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 309 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:21:50,330 INFO L933 BasicCegarLoop]: 956 mSDtfsCounter, 158 mSDsluCounter, 5554 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 70.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 6510 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.49ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.61ms IncrementalHoareTripleChecker+Time [2021-11-13 18:21:50,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 6510 Invalid, 39 Unknown, 0 Unchecked, 11.49ms Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 77.61ms Time] [2021-11-13 18:21:50,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6084 states. [2021-11-13 18:21:50,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6084 to 5198. [2021-11-13 18:21:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5198 states, 4174 states have (on average 1.3193579300431242) internal successors, (5507), 4188 states have internal predecessors, (5507), 712 states have call successors, (712), 300 states have call predecessors, (712), 311 states have return successors, (747), 709 states have call predecessors, (747), 711 states have call successors, (747) [2021-11-13 18:21:50,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5198 states to 5198 states and 6966 transitions. [2021-11-13 18:21:50,663 INFO L78 Accepts]: Start accepts. Automaton has 5198 states and 6966 transitions. Word has length 260 [2021-11-13 18:21:50,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:21:50,663 INFO L470 AbstractCegarLoop]: Abstraction has 5198 states and 6966 transitions. [2021-11-13 18:21:50,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 6 states have internal predecessors, (152), 2 states have call successors, (27), 2 states have call predecessors, (27), 4 states have return successors, (25), 4 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-13 18:21:50,664 INFO L276 IsEmpty]: Start isEmpty. Operand 5198 states and 6966 transitions. [2021-11-13 18:21:50,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-13 18:21:50,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:21:50,675 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 18:21:50,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:21:50,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 18:21:50,892 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:21:50,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:21:50,893 INFO L85 PathProgramCache]: Analyzing trace with hash 2066211031, now seen corresponding path program 2 times [2021-11-13 18:21:50,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:21:50,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004832818] [2021-11-13 18:21:50,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:21:50,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:21:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:51,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:21:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:21:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:21:51,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:21:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:21:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 18:21:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 18:21:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:21:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:21:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-11-13 18:21:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:21:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-11-13 18:21:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-13 18:21:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:21:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:51,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2021-11-13 18:21:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-11-13 18:21:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2021-11-13 18:21:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2021-11-13 18:21:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 215 [2021-11-13 18:21:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2021-11-13 18:21:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2021-11-13 18:21:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2021-11-13 18:21:51,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:21:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-13 18:21:51,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:21:51,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004832818] [2021-11-13 18:21:51,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004832818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:21:51,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517810207] [2021-11-13 18:21:51,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:21:51,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:21:51,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:21:51,819 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:21:51,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:22:45,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:22:45,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:22:45,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 2665 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-13 18:22:45,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:22:46,686 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-13 18:22:46,686 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:22:46,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517810207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:22:46,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:22:46,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 13 [2021-11-13 18:22:46,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204709614] [2021-11-13 18:22:46,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:22:46,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:22:46,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:22:46,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:22:46,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:22:46,690 INFO L87 Difference]: Start difference. First operand 5198 states and 6966 transitions. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (26), 5 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 18:22:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:22:47,078 INFO L93 Difference]: Finished difference Result 11855 states and 15964 transitions. [2021-11-13 18:22:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:22:47,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (26), 5 states have call predecessors, (26), 2 states have call successors, (26) Word has length 266 [2021-11-13 18:22:47,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:22:47,103 INFO L225 Difference]: With dead ends: 11855 [2021-11-13 18:22:47,104 INFO L226 Difference]: Without dead ends: 6688 [2021-11-13 18:22:47,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 317 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:22:47,115 INFO L933 BasicCegarLoop]: 1050 mSDtfsCounter, 221 mSDsluCounter, 8134 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 9184 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.47ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:22:47,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 9184 Invalid, 55 Unknown, 0 Unchecked, 13.47ms Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 67.18ms Time] [2021-11-13 18:22:47,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6688 states. [2021-11-13 18:22:47,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6688 to 5242. [2021-11-13 18:22:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5242 states, 4206 states have (on average 1.3169281978126486) internal successors, (5539), 4220 states have internal predecessors, (5539), 712 states have call successors, (712), 300 states have call predecessors, (712), 323 states have return successors, (783), 721 states have call predecessors, (783), 711 states have call successors, (783) [2021-11-13 18:22:47,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5242 states to 5242 states and 7034 transitions. [2021-11-13 18:22:47,468 INFO L78 Accepts]: Start accepts. Automaton has 5242 states and 7034 transitions. Word has length 266 [2021-11-13 18:22:47,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:22:47,469 INFO L470 AbstractCegarLoop]: Abstraction has 5242 states and 7034 transitions. [2021-11-13 18:22:47,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (26), 5 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 18:22:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5242 states and 7034 transitions. [2021-11-13 18:22:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-13 18:22:47,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:22:47,481 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 18:22:47,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:22:47,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:22:47,695 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:22:47,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:22:47,696 INFO L85 PathProgramCache]: Analyzing trace with hash -326646749, now seen corresponding path program 3 times [2021-11-13 18:22:47,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:22:47,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364247067] [2021-11-13 18:22:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:22:47,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:22:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:22:50,457 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:22:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:22:52,737 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:22:52,738 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:22:52,739 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:22:52,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:22:52,747 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:22:52,752 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:22:53,235 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:22:53,238 INFO L158 Benchmark]: Toolchain (without parser) took 201798.16ms. Allocated memory was 107.0MB in the beginning and 448.8MB in the end (delta: 341.8MB). Free memory was 62.1MB in the beginning and 284.2MB in the end (delta: -222.0MB). Peak memory consumption was 315.2MB. Max. memory is 16.1GB. [2021-11-13 18:22:53,238 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 107.0MB. Free memory is still 86.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:22:53,239 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1986.40ms. Allocated memory was 107.0MB in the beginning and 140.5MB in the end (delta: 33.6MB). Free memory was 61.9MB in the beginning and 62.5MB in the end (delta: -541.2kB). Peak memory consumption was 38.5MB. Max. memory is 16.1GB. [2021-11-13 18:22:53,239 INFO L158 Benchmark]: Boogie Procedure Inliner took 231.15ms. Allocated memory is still 140.5MB. Free memory was 62.5MB in the beginning and 86.8MB in the end (delta: -24.3MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. [2021-11-13 18:22:53,239 INFO L158 Benchmark]: Boogie Preprocessor took 193.70ms. Allocated memory is still 140.5MB. Free memory was 86.8MB in the beginning and 72.8MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-13 18:22:53,240 INFO L158 Benchmark]: RCFGBuilder took 9497.55ms. Allocated memory was 140.5MB in the beginning and 310.4MB in the end (delta: 169.9MB). Free memory was 72.8MB in the beginning and 237.7MB in the end (delta: -164.9MB). Peak memory consumption was 140.7MB. Max. memory is 16.1GB. [2021-11-13 18:22:53,240 INFO L158 Benchmark]: TraceAbstraction took 189883.02ms. Allocated memory was 310.4MB in the beginning and 448.8MB in the end (delta: 138.4MB). Free memory was 237.7MB in the beginning and 284.2MB in the end (delta: -46.5MB). Peak memory consumption was 289.1MB. Max. memory is 16.1GB. [2021-11-13 18:22:53,242 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 107.0MB. Free memory is still 86.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1986.40ms. Allocated memory was 107.0MB in the beginning and 140.5MB in the end (delta: 33.6MB). Free memory was 61.9MB in the beginning and 62.5MB in the end (delta: -541.2kB). Peak memory consumption was 38.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 231.15ms. Allocated memory is still 140.5MB. Free memory was 62.5MB in the beginning and 86.8MB in the end (delta: -24.3MB). Peak memory consumption was 13.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 193.70ms. Allocated memory is still 140.5MB. Free memory was 86.8MB in the beginning and 72.8MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * RCFGBuilder took 9497.55ms. Allocated memory was 140.5MB in the beginning and 310.4MB in the end (delta: 169.9MB). Free memory was 72.8MB in the beginning and 237.7MB in the end (delta: -164.9MB). Peak memory consumption was 140.7MB. Max. memory is 16.1GB. * TraceAbstraction took 189883.02ms. Allocated memory was 310.4MB in the beginning and 448.8MB in the end (delta: 138.4MB). Free memory was 237.7MB in the beginning and 284.2MB in the end (delta: -46.5MB). Peak memory consumption was 289.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:22:53,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d0954289a294fb2be404f98afcefa652a2fbf60d586d07e7d68c419183f4ff07 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:22:55,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:22:55,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:22:55,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:22:55,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:22:55,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:22:55,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:22:55,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:22:55,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:22:55,846 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:22:55,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:22:55,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:22:55,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:22:55,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:22:55,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:22:55,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:22:55,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:22:55,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:22:55,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:22:55,907 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:22:55,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:22:55,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:22:55,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:22:55,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:22:55,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:22:55,926 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:22:55,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:22:55,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:22:55,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:22:55,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:22:55,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:22:55,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:22:55,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:22:55,936 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:22:55,938 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:22:55,938 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:22:55,939 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:22:55,939 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:22:55,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:22:55,942 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:22:55,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:22:55,944 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-13 18:22:55,998 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:22:55,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:22:55,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:22:55,999 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:22:56,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:22:56,001 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:22:56,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:22:56,003 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:22:56,003 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:22:56,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:22:56,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:22:56,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:22:56,005 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:22:56,005 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:22:56,005 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:22:56,006 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:22:56,006 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:22:56,006 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:22:56,006 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:22:56,007 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:22:56,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:22:56,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:22:56,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:22:56,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:22:56,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:22:56,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:22:56,008 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:22:56,009 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:22:56,009 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:22:56,009 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:22:56,009 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:22:56,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:22:56,010 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:22:56,010 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0954289a294fb2be404f98afcefa652a2fbf60d586d07e7d68c419183f4ff07 [2021-11-13 18:22:56,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:22:56,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:22:56,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:22:56,548 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:22:56,549 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:22:56,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point.cil.out.i [2021-11-13 18:22:56,631 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/data/f9d7260d7/cdc152415b64414fb2a9c1a89ba90ea1/FLAGf6a7a6554 [2021-11-13 18:22:57,523 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:22:57,524 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point.cil.out.i [2021-11-13 18:22:57,573 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/data/f9d7260d7/cdc152415b64414fb2a9c1a89ba90ea1/FLAGf6a7a6554 [2021-11-13 18:22:58,063 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/data/f9d7260d7/cdc152415b64414fb2a9c1a89ba90ea1 [2021-11-13 18:22:58,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:22:58,070 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:22:58,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:22:58,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:22:58,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:22:58,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:22:58" (1/1) ... [2021-11-13 18:22:58,078 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76ed3886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:58, skipping insertion in model container [2021-11-13 18:22:58,079 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:22:58" (1/1) ... [2021-11-13 18:22:58,086 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:22:58,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:22:58,856 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name writepages at C: (*writepages)(struct address_space___0 * , struct writeback_control * ) [3507] [2021-11-13 18:22:58,857 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name readpages at C: (*readpages)(struct file___0 *filp , struct address_space___0 *mapping , struct list_head *pages , unsigned int nr_pages ) [3509-3510] [2021-11-13 18:22:58,858 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name write_begin at C: (*write_begin)(struct file___0 * , struct address_space___0 *mapping , loff_t pos , unsigned int len , unsigned int flags , struct page **pagep , void **fsdata ) [3511-3513] [2021-11-13 18:22:58,858 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name write_end at C: (*write_end)(struct file___0 * , struct address_space___0 *mapping , loff_t pos , unsigned int len , unsigned int copied , struct page *page , void *fsdata ) [3514-3515] [2021-11-13 18:22:58,859 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name bmap at C: (*bmap)(struct address_space___0 * , sector_t ) [3516] [2021-11-13 18:22:58,860 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name get_xip_mem at C: (*get_xip_mem)(struct address_space___0 * , unsigned long , int , void ** , unsigned long * ) [3522-3523] [2021-11-13 18:22:58,860 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name migratepage at C: (*migratepage)(struct address_space___0 * , struct page * , struct page * ) [3524] [2021-11-13 18:22:58,861 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name error_remove_page at C: (*error_remove_page)(struct address_space___0 * , struct page * ) [3527] [2021-11-13 18:22:58,875 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name carrier_raised at C: (*carrier_raised)(struct tty_port___0 *port ) [3940] [2021-11-13 18:22:58,876 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name dtr_rts at C: (*dtr_rts)(struct tty_port___0 *port , int raise ) [3941] [2021-11-13 18:22:58,876 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name shutdown at C: (*shutdown)(struct tty_port___0 *port ) [3942] [2021-11-13 18:22:58,877 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name drop at C: (*drop)(struct tty_port___0 *port ) [3943] [2021-11-13 18:22:58,877 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name activate at C: (*activate)(struct tty_port___0 *port , struct tty_struct___0 *tty ) [3944] [2021-11-13 18:22:58,878 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name destruct at C: (*destruct)(struct tty_port___0 *port ) [3945] [2021-11-13 18:22:59,145 WARN L228 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_1ac68eb3-bf23-436b-8e51-327c3755afcc/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point.cil.out.i[130795,130808] [2021-11-13 18:22:59,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:22:59,574 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:22:59,665 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name writepages at C: (*writepages)(struct address_space___0 * , struct writeback_control * ) [3507] [2021-11-13 18:22:59,665 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name readpages at C: (*readpages)(struct file___0 *filp , struct address_space___0 *mapping , struct list_head *pages , unsigned int nr_pages ) [3509-3510] [2021-11-13 18:22:59,666 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name write_begin at C: (*write_begin)(struct file___0 * , struct address_space___0 *mapping , loff_t pos , unsigned int len , unsigned int flags , struct page **pagep , void **fsdata ) [3511-3513] [2021-11-13 18:22:59,666 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name write_end at C: (*write_end)(struct file___0 * , struct address_space___0 *mapping , loff_t pos , unsigned int len , unsigned int copied , struct page *page , void *fsdata ) [3514-3515] [2021-11-13 18:22:59,667 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name bmap at C: (*bmap)(struct address_space___0 * , sector_t ) [3516] [2021-11-13 18:22:59,667 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name get_xip_mem at C: (*get_xip_mem)(struct address_space___0 * , unsigned long , int , void ** , unsigned long * ) [3522-3523] [2021-11-13 18:22:59,667 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name migratepage at C: (*migratepage)(struct address_space___0 * , struct page * , struct page * ) [3524] [2021-11-13 18:22:59,668 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name error_remove_page at C: (*error_remove_page)(struct address_space___0 * , struct page * ) [3527] [2021-11-13 18:22:59,676 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name carrier_raised at C: (*carrier_raised)(struct tty_port___0 *port ) [3940] [2021-11-13 18:22:59,677 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name dtr_rts at C: (*dtr_rts)(struct tty_port___0 *port , int raise ) [3941] [2021-11-13 18:22:59,677 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name shutdown at C: (*shutdown)(struct tty_port___0 *port ) [3942] [2021-11-13 18:22:59,678 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name drop at C: (*drop)(struct tty_port___0 *port ) [3943] [2021-11-13 18:22:59,678 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name activate at C: (*activate)(struct tty_port___0 *port , struct tty_struct___0 *tty ) [3944] [2021-11-13 18:22:59,679 WARN L1236 CHandler]: Detected problem Invalid redeclaration of the name destruct at C: (*destruct)(struct tty_port___0 *port ) [3945] [2021-11-13 18:22:59,697 WARN L228 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_1ac68eb3-bf23-436b-8e51-327c3755afcc/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point.cil.out.i[130795,130808] [2021-11-13 18:22:59,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:22:59,922 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:22:59,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:59 WrapperNode [2021-11-13 18:22:59,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:22:59,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:22:59,925 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:22:59,925 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:22:59,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:59" (1/1) ... [2021-11-13 18:22:59,994 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:59" (1/1) ... [2021-11-13 18:23:00,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:23:00,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:23:00,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:23:00,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:23:00,154 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:59" (1/1) ... [2021-11-13 18:23:00,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:59" (1/1) ... [2021-11-13 18:23:00,176 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:59" (1/1) ... [2021-11-13 18:23:00,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:59" (1/1) ... [2021-11-13 18:23:00,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:59" (1/1) ... [2021-11-13 18:23:00,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:59" (1/1) ... [2021-11-13 18:23:00,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:59" (1/1) ... [2021-11-13 18:23:00,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:23:00,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:23:00,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:23:00,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:23:00,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:59" (1/1) ... [2021-11-13 18:23:00,350 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:23:00,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:23:00,376 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:23:00,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:23:00,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 18:23:00,426 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-13 18:23:00,426 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-13 18:23:00,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 18:23:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 18:23:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 18:23:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 18:23:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:23:00,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:23:00,428 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-13 18:23:00,428 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-13 18:23:00,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 18:23:00,428 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 18:23:00,428 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-13 18:23:00,428 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-13 18:23:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:23:00,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:23:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-13 18:23:00,429 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-13 18:23:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:23:00,430 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:23:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2021-11-13 18:23:00,430 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2021-11-13 18:23:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:23:00,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:23:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-13 18:23:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-13 18:23:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-13 18:23:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-13 18:23:00,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_tty [2021-11-13 18:23:00,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_tty [2021-11-13 18:23:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:23:00,432 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:23:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_1 [2021-11-13 18:23:00,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_1 [2021-11-13 18:23:00,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:23:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-11-13 18:23:00,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-11-13 18:23:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-11-13 18:23:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_tiocmset [2021-11-13 18:23:00,433 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_tiocmset [2021-11-13 18:23:00,433 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_tiocmget [2021-11-13 18:23:00,434 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_tiocmget [2021-11-13 18:23:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:23:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:23:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-13 18:23:00,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-13 18:23:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-13 18:23:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:23:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_ioctl [2021-11-13 18:23:00,435 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_ioctl [2021-11-13 18:23:00,435 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-11-13 18:23:00,435 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-11-13 18:23:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-11-13 18:23:00,436 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-11-13 18:23:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-13 18:23:00,436 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-13 18:23:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 18:23:00,436 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_write_room [2021-11-13 18:23:00,437 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_write_room [2021-11-13 18:23:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 18:23:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:23:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 18:23:00,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:23:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-11-13 18:23:00,438 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-11-13 18:23:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-13 18:23:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:23:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 18:23:00,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 18:23:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_init_termios [2021-11-13 18:23:00,439 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_init_termios [2021-11-13 18:23:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2021-11-13 18:23:00,439 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2021-11-13 18:23:00,439 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 18:23:00,440 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 18:23:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-13 18:23:00,440 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-13 18:23:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-13 18:23:00,440 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_set_termios [2021-11-13 18:23:00,440 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_set_termios [2021-11-13 18:23:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 18:23:00,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 18:23:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:23:00,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:23:01,458 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:23:05,582 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-11-13 18:23:16,410 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:23:16,410 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:23:16,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:23:16 BoogieIcfgContainer [2021-11-13 18:23:16,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:23:16,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:23:16,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:23:16,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:23:16,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:22:58" (1/3) ... [2021-11-13 18:23:16,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ef7cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:23:16, skipping insertion in model container [2021-11-13 18:23:16,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:22:59" (2/3) ... [2021-11-13 18:23:16,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20ef7cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:23:16, skipping insertion in model container [2021-11-13 18:23:16,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:23:16" (3/3) ... [2021-11-13 18:23:16,422 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point.cil.out.i [2021-11-13 18:23:16,427 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:23:16,428 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:23:16,508 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:23:16,515 INFO L339 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=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:23:16,515 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:23:16,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 631 states, 491 states have (on average 1.4419551934826884) internal successors, (708), 500 states have internal predecessors, (708), 112 states have call successors, (112), 28 states have call predecessors, (112), 26 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) [2021-11-13 18:23:16,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:23:16,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:16,575 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:23:16,576 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:16,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:16,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1290775675, now seen corresponding path program 1 times [2021-11-13 18:23:16,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:23:16,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552879581] [2021-11-13 18:23:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:16,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:23:16,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:23:16,604 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:23:16,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:23:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:18,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:23:18,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:18,896 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:23:18,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:23:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 18:23:19,929 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:23:19,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552879581] [2021-11-13 18:23:19,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552879581] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:23:19,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:23:19,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-13 18:23:19,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194550534] [2021-11-13 18:23:19,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:19,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:23:19,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:23:19,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:23:19,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:23:19,979 INFO L87 Difference]: Start difference. First operand has 631 states, 491 states have (on average 1.4419551934826884) internal successors, (708), 500 states have internal predecessors, (708), 112 states have call successors, (112), 28 states have call predecessors, (112), 26 states have return successors, (107), 107 states have call predecessors, (107), 107 states have call successors, (107) Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:23:20,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:20,738 INFO L93 Difference]: Finished difference Result 1223 states and 1839 transitions. [2021-11-13 18:23:20,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:23:20,741 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 58 [2021-11-13 18:23:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:20,761 INFO L225 Difference]: With dead ends: 1223 [2021-11-13 18:23:20,761 INFO L226 Difference]: Without dead ends: 573 [2021-11-13 18:23:20,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:23:20,775 INFO L933 BasicCegarLoop]: 828 mSDtfsCounter, 37 mSDsluCounter, 2459 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 307.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.03ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 354.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:20,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 3287 Invalid, 15 Unknown, 0 Unchecked, 28.03ms Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 354.26ms Time] [2021-11-13 18:23:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-11-13 18:23:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 571. [2021-11-13 18:23:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 440 states have (on average 1.3977272727272727) internal successors, (615), 441 states have internal predecessors, (615), 104 states have call successors, (104), 27 states have call predecessors, (104), 26 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-13 18:23:20,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 822 transitions. [2021-11-13 18:23:20,877 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 822 transitions. Word has length 58 [2021-11-13 18:23:20,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:20,878 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 822 transitions. [2021-11-13 18:23:20,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:23:20,879 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 822 transitions. [2021-11-13 18:23:20,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 18:23:20,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:20,886 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 18:23:20,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:23:21,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:23:21,103 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:21,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:21,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1640476605, now seen corresponding path program 1 times [2021-11-13 18:23:21,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:23:21,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1222474634] [2021-11-13 18:23:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:21,110 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:23:21,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:23:21,112 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:23:21,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:23:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:22,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:23:22,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:23:22,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:23:23,092 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 18:23:23,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:23:23,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1222474634] [2021-11-13 18:23:23,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1222474634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:23,098 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:23,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:23:23,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798959618] [2021-11-13 18:23:23,099 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:23,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:23:23,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:23:23,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:23:23,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:23,102 INFO L87 Difference]: Start difference. First operand 571 states and 822 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:23:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:24,262 INFO L93 Difference]: Finished difference Result 1163 states and 1678 transitions. [2021-11-13 18:23:24,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:23:24,263 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 64 [2021-11-13 18:23:24,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:24,272 INFO L225 Difference]: With dead ends: 1163 [2021-11-13 18:23:24,272 INFO L226 Difference]: Without dead ends: 623 [2021-11-13 18:23:24,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:24,277 INFO L933 BasicCegarLoop]: 808 mSDtfsCounter, 89 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 985.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.75ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1097.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:24,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1492 Invalid, 104 Unknown, 0 Unchecked, 8.75ms Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 1097.59ms Time] [2021-11-13 18:23:24,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-11-13 18:23:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 623. [2021-11-13 18:23:24,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 486 states have (on average 1.3950617283950617) internal successors, (678), 488 states have internal predecessors, (678), 107 states have call successors, (107), 30 states have call predecessors, (107), 29 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2021-11-13 18:23:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 891 transitions. [2021-11-13 18:23:24,330 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 891 transitions. Word has length 64 [2021-11-13 18:23:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:24,331 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 891 transitions. [2021-11-13 18:23:24,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:23:24,332 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 891 transitions. [2021-11-13 18:23:24,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-13 18:23:24,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:24,338 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 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] [2021-11-13 18:23:24,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:23:24,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:23:24,561 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:24,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:24,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1952675630, now seen corresponding path program 1 times [2021-11-13 18:23:24,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:23:24,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033434437] [2021-11-13 18:23:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:24,565 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:23:24,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:23:24,567 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:23:24,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:23:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:25,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 1041 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:23:25,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 18:23:26,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:23:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-13 18:23:27,188 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:23:27,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033434437] [2021-11-13 18:23:27,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033434437] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:27,189 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:27,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 18:23:27,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357757680] [2021-11-13 18:23:27,190 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:27,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:23:27,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:23:27,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:23:27,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:23:27,192 INFO L87 Difference]: Start difference. First operand 623 states and 891 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 18:23:29,371 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:23:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:30,029 INFO L93 Difference]: Finished difference Result 1800 states and 2588 transitions. [2021-11-13 18:23:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:23:30,030 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 102 [2021-11-13 18:23:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:30,042 INFO L225 Difference]: With dead ends: 1800 [2021-11-13 18:23:30,042 INFO L226 Difference]: Without dead ends: 1182 [2021-11-13 18:23:30,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:23:30,049 INFO L933 BasicCegarLoop]: 1570 mSDtfsCounter, 771 mSDsluCounter, 3922 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2416.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 5492 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.59ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2482.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:30,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 5492 Invalid, 32 Unknown, 0 Unchecked, 23.59ms Time], IncrementalHoareTripleChecker [4 Valid, 27 Invalid, 1 Unknown, 0 Unchecked, 2482.56ms Time] [2021-11-13 18:23:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-11-13 18:23:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1128. [2021-11-13 18:23:30,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 882 states have (on average 1.40702947845805) internal successors, (1241), 883 states have internal predecessors, (1241), 196 states have call successors, (196), 50 states have call predecessors, (196), 49 states have return successors, (195), 194 states have call predecessors, (195), 195 states have call successors, (195) [2021-11-13 18:23:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1632 transitions. [2021-11-13 18:23:30,150 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1632 transitions. Word has length 102 [2021-11-13 18:23:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:30,152 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 1632 transitions. [2021-11-13 18:23:30,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 18:23:30,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1632 transitions. [2021-11-13 18:23:30,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 18:23:30,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:30,159 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-11-13 18:23:30,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:23:30,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:23:30,383 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:30,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1186314309, now seen corresponding path program 1 times [2021-11-13 18:23:30,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:23:30,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [413511599] [2021-11-13 18:23:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:30,385 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:23:30,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:23:30,389 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:23:30,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:23:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:31,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1097 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:23:31,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:23:32,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:23:33,186 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-13 18:23:33,186 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:23:33,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [413511599] [2021-11-13 18:23:33,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [413511599] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:33,187 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:33,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:23:33,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684882933] [2021-11-13 18:23:33,188 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:33,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:23:33,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:23:33,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:23:33,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:23:33,190 INFO L87 Difference]: Start difference. First operand 1128 states and 1632 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-13 18:23:35,369 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:23:38,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:38,643 INFO L93 Difference]: Finished difference Result 3219 states and 4670 transitions. [2021-11-13 18:23:38,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:23:38,645 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 112 [2021-11-13 18:23:38,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:38,663 INFO L225 Difference]: With dead ends: 3219 [2021-11-13 18:23:38,663 INFO L226 Difference]: Without dead ends: 2122 [2021-11-13 18:23:38,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:23:38,671 INFO L933 BasicCegarLoop]: 901 mSDtfsCounter, 1067 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 187 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5087.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1067 SdHoareTripleChecker+Valid, 1734 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.61ms SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5301.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:38,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1067 Valid, 1734 Invalid, 500 Unknown, 0 Unchecked, 10.61ms Time], IncrementalHoareTripleChecker [187 Valid, 312 Invalid, 1 Unknown, 0 Unchecked, 5301.79ms Time] [2021-11-13 18:23:38,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-11-13 18:23:38,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2116. [2021-11-13 18:23:38,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2116 states, 1688 states have (on average 1.4022511848341233) internal successors, (2367), 1691 states have internal predecessors, (2367), 308 states have call successors, (308), 120 states have call predecessors, (308), 119 states have return successors, (307), 304 states have call predecessors, (307), 307 states have call successors, (307) [2021-11-13 18:23:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2116 states to 2116 states and 2982 transitions. [2021-11-13 18:23:38,795 INFO L78 Accepts]: Start accepts. Automaton has 2116 states and 2982 transitions. Word has length 112 [2021-11-13 18:23:38,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:38,799 INFO L470 AbstractCegarLoop]: Abstraction has 2116 states and 2982 transitions. [2021-11-13 18:23:38,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 4 states have call successors, (19), 3 states have call predecessors, (19), 3 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-13 18:23:38,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2116 states and 2982 transitions. [2021-11-13 18:23:38,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 18:23:38,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:38,812 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-11-13 18:23:38,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:23:39,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:23:39,027 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:39,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:39,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1884264768, now seen corresponding path program 1 times [2021-11-13 18:23:39,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:23:39,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505272151] [2021-11-13 18:23:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:39,029 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:23:39,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:23:39,033 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:23:39,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:23:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:40,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:23:40,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-13 18:23:40,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:23:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-13 18:23:40,871 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:23:40,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505272151] [2021-11-13 18:23:40,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505272151] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:23:40,871 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:23:40,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:23:40,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824216014] [2021-11-13 18:23:40,872 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:23:40,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:23:40,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:23:40,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:23:40,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:40,876 INFO L87 Difference]: Start difference. First operand 2116 states and 2982 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 18:23:42,941 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:23:43,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:23:43,128 INFO L93 Difference]: Finished difference Result 4207 states and 5948 transitions. [2021-11-13 18:23:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:23:43,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) Word has length 122 [2021-11-13 18:23:43,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:23:43,148 INFO L225 Difference]: With dead ends: 4207 [2021-11-13 18:23:43,148 INFO L226 Difference]: Without dead ends: 2122 [2021-11-13 18:23:43,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:23:43,157 INFO L933 BasicCegarLoop]: 797 mSDtfsCounter, 0 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2061.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2169.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:23:43,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1590 Invalid, 4 Unknown, 0 Unchecked, 2.71ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 1 Unknown, 0 Unchecked, 2169.22ms Time] [2021-11-13 18:23:43,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-11-13 18:23:43,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2122. [2021-11-13 18:23:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2122 states, 1694 states have (on average 1.4008264462809918) internal successors, (2373), 1697 states have internal predecessors, (2373), 308 states have call successors, (308), 120 states have call predecessors, (308), 119 states have return successors, (307), 304 states have call predecessors, (307), 307 states have call successors, (307) [2021-11-13 18:23:43,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2122 states to 2122 states and 2988 transitions. [2021-11-13 18:23:43,298 INFO L78 Accepts]: Start accepts. Automaton has 2122 states and 2988 transitions. Word has length 122 [2021-11-13 18:23:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:23:43,299 INFO L470 AbstractCegarLoop]: Abstraction has 2122 states and 2988 transitions. [2021-11-13 18:23:43,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 1 states have call predecessors, (13), 1 states have call successors, (13) [2021-11-13 18:23:43,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2122 states and 2988 transitions. [2021-11-13 18:23:43,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-13 18:23:43,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:23:43,302 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-11-13 18:23:43,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:23:43,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:23:43,527 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:23:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:23:43,527 INFO L85 PathProgramCache]: Analyzing trace with hash -109257406, now seen corresponding path program 1 times [2021-11-13 18:23:43,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:23:43,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418130064] [2021-11-13 18:23:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:23:43,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:23:43,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:23:43,532 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:23:43,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:23:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:23:44,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1119 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:23:44,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:23:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 108 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:23:52,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:23:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-13 18:23:57,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:23:57,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418130064] [2021-11-13 18:23:57,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418130064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:23:57,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:23:57,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2021-11-13 18:23:57,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250943723] [2021-11-13 18:23:57,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:23:57,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 18:23:57,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:23:57,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 18:23:57,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:23:57,781 INFO L87 Difference]: Start difference. First operand 2122 states and 2988 transitions. Second operand has 24 states, 22 states have (on average 6.0) internal successors, (132), 17 states have internal predecessors, (132), 11 states have call successors, (26), 8 states have call predecessors, (26), 6 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-13 18:23:59,900 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:24:01,927 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:24:03,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:24:05,944 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:24:07,951 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:24:09,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:24:11,966 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:24:13,975 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:24:15,986 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:24:26,201 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:25:03,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:25:03,409 INFO L93 Difference]: Finished difference Result 6327 states and 8953 transitions. [2021-11-13 18:25:03,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 18:25:03,411 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 6.0) internal successors, (132), 17 states have internal predecessors, (132), 11 states have call successors, (26), 8 states have call predecessors, (26), 6 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) Word has length 122 [2021-11-13 18:25:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:25:03,462 INFO L225 Difference]: With dead ends: 6327 [2021-11-13 18:25:03,462 INFO L226 Difference]: Without dead ends: 6324 [2021-11-13 18:25:03,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2021-11-13 18:25:03,467 INFO L933 BasicCegarLoop]: 1055 mSDtfsCounter, 3141 mSDsluCounter, 13469 mSDsCounter, 0 mSdLazyCounter, 3804 mSolverCounterSat, 614 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58380.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3162 SdHoareTripleChecker+Valid, 14524 SdHoareTripleChecker+Invalid, 4428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 69.46ms SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 3804 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 60297.15ms IncrementalHoareTripleChecker+Time [2021-11-13 18:25:03,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3162 Valid, 14524 Invalid, 4428 Unknown, 0 Unchecked, 69.46ms Time], IncrementalHoareTripleChecker [614 Valid, 3804 Invalid, 10 Unknown, 0 Unchecked, 60297.15ms Time] [2021-11-13 18:25:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6324 states. [2021-11-13 18:25:03,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6324 to 6226. [2021-11-13 18:25:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6226 states, 4974 states have (on average 1.4051065540812224) internal successors, (6989), 4989 states have internal predecessors, (6989), 892 states have call successors, (892), 358 states have call predecessors, (892), 359 states have return successors, (917), 878 states have call predecessors, (917), 891 states have call successors, (917) [2021-11-13 18:25:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6226 states to 6226 states and 8798 transitions. [2021-11-13 18:25:03,830 INFO L78 Accepts]: Start accepts. Automaton has 6226 states and 8798 transitions. Word has length 122 [2021-11-13 18:25:03,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:25:03,832 INFO L470 AbstractCegarLoop]: Abstraction has 6226 states and 8798 transitions. [2021-11-13 18:25:03,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 6.0) internal successors, (132), 17 states have internal predecessors, (132), 11 states have call successors, (26), 8 states have call predecessors, (26), 6 states have return successors, (22), 11 states have call predecessors, (22), 8 states have call successors, (22) [2021-11-13 18:25:03,833 INFO L276 IsEmpty]: Start isEmpty. Operand 6226 states and 8798 transitions. [2021-11-13 18:25:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-13 18:25:03,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:25:03,845 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:25:03,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:25:04,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:25:04,072 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:25:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:04,072 INFO L85 PathProgramCache]: Analyzing trace with hash 462775243, now seen corresponding path program 1 times [2021-11-13 18:25:04,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:25:04,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641749371] [2021-11-13 18:25:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:04,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:25:04,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:25:04,076 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:25:04,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:25:05,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:05,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:25:05,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-11-13 18:25:06,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2021-11-13 18:25:07,084 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:25:07,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641749371] [2021-11-13 18:25:07,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641749371] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:25:07,085 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:25:07,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:25:07,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410460805] [2021-11-13 18:25:07,085 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:25:07,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:25:07,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:25:07,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:25:07,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:25:07,087 INFO L87 Difference]: Start difference. First operand 6226 states and 8798 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-13 18:25:09,217 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:25:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:25:12,755 INFO L93 Difference]: Finished difference Result 14447 states and 20520 transitions. [2021-11-13 18:25:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:25:12,756 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 176 [2021-11-13 18:25:12,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:25:12,811 INFO L225 Difference]: With dead ends: 14447 [2021-11-13 18:25:12,811 INFO L226 Difference]: Without dead ends: 8252 [2021-11-13 18:25:12,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:25:12,828 INFO L933 BasicCegarLoop]: 1031 mSDtfsCounter, 941 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 88 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5224.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 1967 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.51ms SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5382.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:25:12,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [941 Valid, 1967 Invalid, 435 Unknown, 0 Unchecked, 6.51ms Time], IncrementalHoareTripleChecker [88 Valid, 346 Invalid, 1 Unknown, 0 Unchecked, 5382.56ms Time] [2021-11-13 18:25:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8252 states. [2021-11-13 18:25:13,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8252 to 8201. [2021-11-13 18:25:13,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8201 states, 6671 states have (on average 1.3963423774546544) internal successors, (9315), 6689 states have internal predecessors, (9315), 1066 states have call successors, (1066), 462 states have call predecessors, (1066), 463 states have return successors, (1091), 1049 states have call predecessors, (1091), 1065 states have call successors, (1091) [2021-11-13 18:25:13,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 11472 transitions. [2021-11-13 18:25:13,330 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 11472 transitions. Word has length 176 [2021-11-13 18:25:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:25:13,331 INFO L470 AbstractCegarLoop]: Abstraction has 8201 states and 11472 transitions. [2021-11-13 18:25:13,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-13 18:25:13,332 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 11472 transitions. [2021-11-13 18:25:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-13 18:25:13,348 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:25:13,348 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:25:13,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:25:13,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:25:13,576 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:25:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:13,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1062429738, now seen corresponding path program 1 times [2021-11-13 18:25:13,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:25:13,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597220518] [2021-11-13 18:25:13,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:13,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:25:13,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:25:13,580 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:25:13,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:25:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:14,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 1321 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:25:14,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:15,821 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2021-11-13 18:25:15,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-13 18:25:16,673 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:25:16,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597220518] [2021-11-13 18:25:16,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597220518] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:25:16,675 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:25:16,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 18:25:16,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611620803] [2021-11-13 18:25:16,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:25:16,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:25:16,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:25:16,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:25:16,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:25:16,677 INFO L87 Difference]: Start difference. First operand 8201 states and 11472 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 18:25:18,794 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:25:20,801 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:25:23,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:25:23,009 INFO L93 Difference]: Finished difference Result 23235 states and 32124 transitions. [2021-11-13 18:25:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:25:23,011 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 199 [2021-11-13 18:25:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:25:23,097 INFO L225 Difference]: With dead ends: 23235 [2021-11-13 18:25:23,097 INFO L226 Difference]: Without dead ends: 15065 [2021-11-13 18:25:23,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:25:23,119 INFO L933 BasicCegarLoop]: 1290 mSDtfsCounter, 1222 mSDsluCounter, 3238 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 58 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5551.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 4528 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.74ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5674.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:25:23,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1222 Valid, 4528 Invalid, 194 Unknown, 0 Unchecked, 10.74ms Time], IncrementalHoareTripleChecker [58 Valid, 134 Invalid, 2 Unknown, 0 Unchecked, 5674.59ms Time] [2021-11-13 18:25:23,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15065 states. [2021-11-13 18:25:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15065 to 8213. [2021-11-13 18:25:23,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8213 states, 6683 states have (on average 1.3956307047733054) internal successors, (9327), 6701 states have internal predecessors, (9327), 1066 states have call successors, (1066), 462 states have call predecessors, (1066), 463 states have return successors, (1091), 1049 states have call predecessors, (1091), 1065 states have call successors, (1091) [2021-11-13 18:25:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8213 states to 8213 states and 11484 transitions. [2021-11-13 18:25:23,734 INFO L78 Accepts]: Start accepts. Automaton has 8213 states and 11484 transitions. Word has length 199 [2021-11-13 18:25:23,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:25:23,735 INFO L470 AbstractCegarLoop]: Abstraction has 8213 states and 11484 transitions. [2021-11-13 18:25:23,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 18:25:23,735 INFO L276 IsEmpty]: Start isEmpty. Operand 8213 states and 11484 transitions. [2021-11-13 18:25:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-13 18:25:23,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:25:23,756 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:25:23,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:25:23,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:25:23,976 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:25:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1025340556, now seen corresponding path program 1 times [2021-11-13 18:25:23,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:25:23,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234976880] [2021-11-13 18:25:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:23,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:25:23,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:25:23,979 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:25:23,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:25:25,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:25,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 1363 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 18:25:25,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-11-13 18:25:27,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 31 proven. 10 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-11-13 18:25:30,335 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:25:30,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234976880] [2021-11-13 18:25:30,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1234976880] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:25:30,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:25:30,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2021-11-13 18:25:30,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667381612] [2021-11-13 18:25:30,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:25:30,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:25:30,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:25:30,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:25:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:25:30,338 INFO L87 Difference]: Start difference. First operand 8213 states and 11484 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-13 18:25:31,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:25:31,499 INFO L93 Difference]: Finished difference Result 17772 states and 24855 transitions. [2021-11-13 18:25:31,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:25:31,501 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 2 states have call successors, (19) Word has length 205 [2021-11-13 18:25:31,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:25:31,543 INFO L225 Difference]: With dead ends: 17772 [2021-11-13 18:25:31,544 INFO L226 Difference]: Without dead ends: 9590 [2021-11-13 18:25:31,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:25:31,589 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 159 mSDsluCounter, 5718 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 413.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 6701 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.36ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 432.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:25:31,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 6701 Invalid, 39 Unknown, 0 Unchecked, 11.36ms Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 432.91ms Time] [2021-11-13 18:25:31,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9590 states. [2021-11-13 18:25:32,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9590 to 8261. [2021-11-13 18:25:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8261 states, 6719 states have (on average 1.3935109391278464) internal successors, (9363), 6737 states have internal predecessors, (9363), 1066 states have call successors, (1066), 462 states have call predecessors, (1066), 475 states have return successors, (1121), 1061 states have call predecessors, (1121), 1065 states have call successors, (1121) [2021-11-13 18:25:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8261 states to 8261 states and 11550 transitions. [2021-11-13 18:25:32,204 INFO L78 Accepts]: Start accepts. Automaton has 8261 states and 11550 transitions. Word has length 205 [2021-11-13 18:25:32,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:25:32,205 INFO L470 AbstractCegarLoop]: Abstraction has 8261 states and 11550 transitions. [2021-11-13 18:25:32,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 6 states have internal predecessors, (124), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (19), 4 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-13 18:25:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 8261 states and 11550 transitions. [2021-11-13 18:25:32,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-13 18:25:32,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:25:32,225 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-13 18:25:32,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:25:32,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:25:32,446 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:25:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:32,446 INFO L85 PathProgramCache]: Analyzing trace with hash -586740668, now seen corresponding path program 2 times [2021-11-13 18:25:32,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:25:32,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [488807599] [2021-11-13 18:25:32,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:25:32,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:25:32,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:25:32,449 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:25:32,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:25:33,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 18:25:33,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:25:33,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:25:33,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-11-13 18:25:37,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-11-13 18:25:39,503 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:25:39,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [488807599] [2021-11-13 18:25:39,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [488807599] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:25:39,503 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:25:39,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:25:39,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925399610] [2021-11-13 18:25:39,504 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:25:39,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:25:39,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:25:39,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:25:39,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:25:39,506 INFO L87 Difference]: Start difference. First operand 8261 states and 11550 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-13 18:25:40,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:25:40,103 INFO L93 Difference]: Finished difference Result 16491 states and 23136 transitions. [2021-11-13 18:25:40,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:25:40,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) Word has length 211 [2021-11-13 18:25:40,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:25:40,133 INFO L225 Difference]: With dead ends: 16491 [2021-11-13 18:25:40,133 INFO L226 Difference]: Without dead ends: 8261 [2021-11-13 18:25:40,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:25:40,152 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 641 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 291.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.62ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 305.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:25:40,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [641 Valid, 741 Invalid, 56 Unknown, 0 Unchecked, 2.62ms Time], IncrementalHoareTripleChecker [27 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 305.30ms Time] [2021-11-13 18:25:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8261 states. [2021-11-13 18:25:40,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8261 to 8261. [2021-11-13 18:25:40,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8261 states, 6719 states have (on average 1.3503497544277423) internal successors, (9073), 6737 states have internal predecessors, (9073), 1066 states have call successors, (1066), 462 states have call predecessors, (1066), 475 states have return successors, (1121), 1061 states have call predecessors, (1121), 1065 states have call successors, (1121) [2021-11-13 18:25:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8261 states to 8261 states and 11260 transitions. [2021-11-13 18:25:40,628 INFO L78 Accepts]: Start accepts. Automaton has 8261 states and 11260 transitions. Word has length 211 [2021-11-13 18:25:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:25:40,631 INFO L470 AbstractCegarLoop]: Abstraction has 8261 states and 11260 transitions. [2021-11-13 18:25:40,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 3 states have call successors, (38), 3 states have call predecessors, (38), 3 states have return successors, (36), 3 states have call predecessors, (36), 3 states have call successors, (36) [2021-11-13 18:25:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 8261 states and 11260 transitions. [2021-11-13 18:25:40,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-13 18:25:40,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:25:40,654 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 4, 4, 4, 3, 3, 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] [2021-11-13 18:25:40,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:25:40,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:25:40,883 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:25:40,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:40,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1614388792, now seen corresponding path program 1 times [2021-11-13 18:25:40,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:25:40,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674476848] [2021-11-13 18:25:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:40,885 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:25:40,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:25:40,887 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:25:40,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:25:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:42,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:25:42,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:43,114 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-13 18:25:43,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:43,750 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-13 18:25:43,750 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:25:43,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674476848] [2021-11-13 18:25:43,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674476848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:25:43,751 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:25:43,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 18:25:43,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831002987] [2021-11-13 18:25:43,751 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:25:43,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:25:43,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:25:43,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:25:43,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:25:43,753 INFO L87 Difference]: Start difference. First operand 8261 states and 11260 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-13 18:25:45,874 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:25:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:25:48,930 INFO L93 Difference]: Finished difference Result 28739 states and 39072 transitions. [2021-11-13 18:25:48,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:25:48,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 211 [2021-11-13 18:25:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:25:49,004 INFO L225 Difference]: With dead ends: 28739 [2021-11-13 18:25:49,004 INFO L226 Difference]: Without dead ends: 20509 [2021-11-13 18:25:49,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 417 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:25:49,069 INFO L933 BasicCegarLoop]: 1392 mSDtfsCounter, 1785 mSDsluCounter, 3965 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 208 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4124.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1785 SdHoareTripleChecker+Valid, 5357 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.36ms SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4300.55ms IncrementalHoareTripleChecker+Time [2021-11-13 18:25:49,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1785 Valid, 5357 Invalid, 404 Unknown, 0 Unchecked, 11.36ms Time], IncrementalHoareTripleChecker [208 Valid, 195 Invalid, 1 Unknown, 0 Unchecked, 4300.55ms Time] [2021-11-13 18:25:49,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20509 states. [2021-11-13 18:25:49,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20509 to 8273. [2021-11-13 18:25:49,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8273 states, 6731 states have (on average 1.3497251522804932) internal successors, (9085), 6749 states have internal predecessors, (9085), 1066 states have call successors, (1066), 462 states have call predecessors, (1066), 475 states have return successors, (1121), 1061 states have call predecessors, (1121), 1065 states have call successors, (1121) [2021-11-13 18:25:49,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8273 states to 8273 states and 11272 transitions. [2021-11-13 18:25:49,758 INFO L78 Accepts]: Start accepts. Automaton has 8273 states and 11272 transitions. Word has length 211 [2021-11-13 18:25:49,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:25:49,759 INFO L470 AbstractCegarLoop]: Abstraction has 8273 states and 11272 transitions. [2021-11-13 18:25:49,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-13 18:25:49,759 INFO L276 IsEmpty]: Start isEmpty. Operand 8273 states and 11272 transitions. [2021-11-13 18:25:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-11-13 18:25:49,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:25:49,777 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 18:25:49,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:25:50,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:25:50,003 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:25:50,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:50,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1919102867, now seen corresponding path program 1 times [2021-11-13 18:25:50,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:25:50,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [560827977] [2021-11-13 18:25:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:50,006 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:25:50,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:25:50,007 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:25:50,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 18:25:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:51,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 1545 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:25:51,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:25:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2021-11-13 18:25:54,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:25:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 29 proven. 8 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-13 18:25:59,639 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:25:59,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [560827977] [2021-11-13 18:25:59,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [560827977] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:25:59,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:25:59,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2021-11-13 18:25:59,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652904789] [2021-11-13 18:25:59,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:25:59,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:25:59,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:25:59,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:25:59,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:25:59,641 INFO L87 Difference]: Start difference. First operand 8273 states and 11272 transitions. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (26), 5 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 18:26:00,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:00,795 INFO L93 Difference]: Finished difference Result 19332 states and 26649 transitions. [2021-11-13 18:26:00,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:26:00,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (26), 5 states have call predecessors, (26), 2 states have call successors, (26) Word has length 266 [2021-11-13 18:26:00,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:00,833 INFO L225 Difference]: With dead ends: 19332 [2021-11-13 18:26:00,833 INFO L226 Difference]: Without dead ends: 11090 [2021-11-13 18:26:00,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:26:00,850 INFO L933 BasicCegarLoop]: 1047 mSDtfsCounter, 222 mSDsluCounter, 8113 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 466.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 9160 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.13ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 479.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:00,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 9160 Invalid, 55 Unknown, 0 Unchecked, 10.13ms Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 479.10ms Time] [2021-11-13 18:26:00,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11090 states. [2021-11-13 18:26:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11090 to 8339. [2021-11-13 18:26:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8339 states, 6779 states have (on average 1.3472488567635343) internal successors, (9133), 6797 states have internal predecessors, (9133), 1066 states have call successors, (1066), 462 states have call predecessors, (1066), 493 states have return successors, (1175), 1079 states have call predecessors, (1175), 1065 states have call successors, (1175) [2021-11-13 18:26:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8339 states to 8339 states and 11374 transitions. [2021-11-13 18:26:01,550 INFO L78 Accepts]: Start accepts. Automaton has 8339 states and 11374 transitions. Word has length 266 [2021-11-13 18:26:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:01,555 INFO L470 AbstractCegarLoop]: Abstraction has 8339 states and 11374 transitions. [2021-11-13 18:26:01,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (27), 2 states have call predecessors, (27), 5 states have return successors, (26), 5 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 18:26:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 8339 states and 11374 transitions. [2021-11-13 18:26:01,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-13 18:26:01,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:01,579 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 18:26:01,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:26:01,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:26:01,803 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:01,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:01,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1097628773, now seen corresponding path program 2 times [2021-11-13 18:26:01,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:26:01,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398212922] [2021-11-13 18:26:01,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:26:01,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:26:01,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:26:01,806 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:26:01,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 18:27:44,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:27:44,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:27:45,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1560 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:27:45,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:27:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-13 18:27:46,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:27:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-11-13 18:27:47,357 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:27:47,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398212922] [2021-11-13 18:27:47,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398212922] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:47,358 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:47,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:27:47,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307043309] [2021-11-13 18:27:47,359 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:47,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:47,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:27:47,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:47,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:47,360 INFO L87 Difference]: Start difference. First operand 8339 states and 11374 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 18:27:47,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:47,739 INFO L93 Difference]: Finished difference Result 16653 states and 22724 transitions. [2021-11-13 18:27:47,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:47,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 272 [2021-11-13 18:27:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:47,768 INFO L225 Difference]: With dead ends: 16653 [2021-11-13 18:27:47,769 INFO L226 Difference]: Without dead ends: 8345 [2021-11-13 18:27:47,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:47,783 INFO L933 BasicCegarLoop]: 769 mSDtfsCounter, 0 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.86ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:47,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1533 Invalid, 6 Unknown, 0 Unchecked, 1.86ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 59.30ms Time] [2021-11-13 18:27:47,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8345 states. [2021-11-13 18:27:48,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8345 to 8345. [2021-11-13 18:27:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8345 states, 6785 states have (on average 1.3469417833456154) internal successors, (9139), 6803 states have internal predecessors, (9139), 1066 states have call successors, (1066), 462 states have call predecessors, (1066), 493 states have return successors, (1175), 1079 states have call predecessors, (1175), 1065 states have call successors, (1175) [2021-11-13 18:27:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8345 states to 8345 states and 11380 transitions. [2021-11-13 18:27:48,338 INFO L78 Accepts]: Start accepts. Automaton has 8345 states and 11380 transitions. Word has length 272 [2021-11-13 18:27:48,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:48,339 INFO L470 AbstractCegarLoop]: Abstraction has 8345 states and 11380 transitions. [2021-11-13 18:27:48,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 18:27:48,339 INFO L276 IsEmpty]: Start isEmpty. Operand 8345 states and 11380 transitions. [2021-11-13 18:27:48,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-13 18:27:48,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:48,354 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 18:27:48,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:27:48,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:27:48,567 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:48,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2126988071, now seen corresponding path program 1 times [2021-11-13 18:27:48,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:27:48,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652639061] [2021-11-13 18:27:48,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:48,570 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:27:48,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:27:48,571 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:27:48,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 18:27:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:50,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:27:50,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:27:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2021-11-13 18:27:50,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:27:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2021-11-13 18:27:51,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:27:51,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652639061] [2021-11-13 18:27:51,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652639061] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:51,594 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:51,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 18:27:51,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667042388] [2021-11-13 18:27:51,594 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:51,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:51,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:27:51,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:51,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:27:51,596 INFO L87 Difference]: Start difference. First operand 8345 states and 11380 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 18:27:52,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:52,196 INFO L93 Difference]: Finished difference Result 16683 states and 22766 transitions. [2021-11-13 18:27:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:27:52,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 272 [2021-11-13 18:27:52,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:52,222 INFO L225 Difference]: With dead ends: 16683 [2021-11-13 18:27:52,222 INFO L226 Difference]: Without dead ends: 8369 [2021-11-13 18:27:52,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:27:52,237 INFO L933 BasicCegarLoop]: 767 mSDtfsCounter, 2 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2294 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.02ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 137.78ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:52,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2294 Invalid, 16 Unknown, 0 Unchecked, 3.02ms Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 137.78ms Time] [2021-11-13 18:27:52,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8369 states. [2021-11-13 18:27:52,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8369 to 8363. [2021-11-13 18:27:52,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8363 states, 6803 states have (on average 1.3460238130236661) internal successors, (9157), 6821 states have internal predecessors, (9157), 1066 states have call successors, (1066), 462 states have call predecessors, (1066), 493 states have return successors, (1175), 1079 states have call predecessors, (1175), 1065 states have call successors, (1175) [2021-11-13 18:27:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8363 states to 8363 states and 11398 transitions. [2021-11-13 18:27:52,763 INFO L78 Accepts]: Start accepts. Automaton has 8363 states and 11398 transitions. Word has length 272 [2021-11-13 18:27:52,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:52,763 INFO L470 AbstractCegarLoop]: Abstraction has 8363 states and 11398 transitions. [2021-11-13 18:27:52,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-13 18:27:52,764 INFO L276 IsEmpty]: Start isEmpty. Operand 8363 states and 11398 transitions. [2021-11-13 18:27:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-11-13 18:27:52,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:52,779 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 18:27:52,817 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:27:53,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:27:53,003 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:53,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1251587165, now seen corresponding path program 1 times [2021-11-13 18:27:53,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:27:53,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649337939] [2021-11-13 18:27:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:53,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:27:53,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:27:53,006 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:27:53,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ac68eb3-bf23-436b-8e51-327c3755afcc/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 18:30:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:30:44,143 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.