./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-4ed3cba-1-100_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-4ed3cba-1-100_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 46b0ad08a581b5bde0454ec418cbe0193c7ec6a3f6e007f87f30934488ee8554 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:47:33,133 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:47:33,243 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-21 19:47:33,254 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:47:33,254 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:47:33,308 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:47:33,309 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:47:33,310 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:47:33,325 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:47:33,330 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:47:33,331 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:47:33,332 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:47:33,333 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:47:33,335 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:47:33,335 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:47:33,336 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:47:33,336 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:47:33,337 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:47:33,337 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:47:33,338 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:47:33,338 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:47:33,349 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:47:33,350 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:47:33,351 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 19:47:33,351 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:47:33,352 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:47:33,352 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 19:47:33,353 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:47:33,353 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 19:47:33,354 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 19:47:33,355 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:47:33,356 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:47:33,356 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:47:33,356 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:47:33,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:47:33,357 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:47:33,357 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:47:33,358 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 19:47:33,358 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:47:33,358 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:47:33,358 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:47:33,359 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 19:47:33,359 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:47:33,359 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:47:33,360 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 46b0ad08a581b5bde0454ec418cbe0193c7ec6a3f6e007f87f30934488ee8554 [2023-11-21 19:47:33,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:47:33,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:47:33,742 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:47:33,744 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:47:33,744 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:47:33,746 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-4ed3cba-1-100_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2023-11-21 19:47:37,025 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:47:37,516 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:47:37,517 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-4ed3cba-1-100_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2023-11-21 19:47:37,552 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/data/4fb2a9570/68a570ef24f44013b75761a949813515/FLAGffae724cd [2023-11-21 19:47:37,567 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/data/4fb2a9570/68a570ef24f44013b75761a949813515 [2023-11-21 19:47:37,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:47:37,572 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:47:37,574 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:47:37,574 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:47:37,579 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:47:37,580 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:47:37" (1/1) ... [2023-11-21 19:47:37,581 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50376821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:37, skipping insertion in model container [2023-11-21 19:47:37,582 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:47:37" (1/1) ... [2023-11-21 19:47:37,720 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:47:38,238 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name writepages at C: (*writepages)(struct address_space___0 * , struct writeback_control * ) [3504] [2023-11-21 19:47:38,239 WARN L1274 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 ) [3506-3507] [2023-11-21 19:47:38,240 WARN L1274 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 ) [3508-3510] [2023-11-21 19:47:38,240 WARN L1274 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 ) [3511-3512] [2023-11-21 19:47:38,242 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name bmap at C: (*bmap)(struct address_space___0 * , sector_t ) [3513] [2023-11-21 19:47:38,242 WARN L1274 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 * ) [3519-3520] [2023-11-21 19:47:38,243 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name migratepage at C: (*migratepage)(struct address_space___0 * , struct page * , struct page * ) [3521] [2023-11-21 19:47:38,243 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name error_remove_page at C: (*error_remove_page)(struct address_space___0 * , struct page * ) [3524] [2023-11-21 19:47:38,255 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name lookup at C: *(*lookup)(struct tty_driver___0 *driver , struct inode___0 *inode , int idx ) [3838-3839] [2023-11-21 19:47:38,256 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name install at C: (*install)(struct tty_driver___0 *driver , struct tty_struct___0 *tty ) [3840] [2023-11-21 19:47:38,257 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name remove at C: (*remove)(struct tty_driver___0 *driver , struct tty_struct___0 *tty ) [3841] [2023-11-21 19:47:38,263 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name poll_init at C: (*poll_init)(struct tty_driver___0 *driver , int line , char *options ) [3872] [2023-11-21 19:47:38,263 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name poll_get_char at C: (*poll_get_char)(struct tty_driver___0 *driver , int line ) [3873] [2023-11-21 19:47:38,264 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name poll_put_char at C: (*poll_put_char)(struct tty_driver___0 *driver , int line , char ch ) [3874] [2023-11-21 19:47:38,265 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name carrier_raised at C: (*carrier_raised)(struct tty_port___0 *port ) [3934] [2023-11-21 19:47:38,266 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name dtr_rts at C: (*dtr_rts)(struct tty_port___0 *port , int raise ) [3935] [2023-11-21 19:47:38,266 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name shutdown at C: (*shutdown)(struct tty_port___0 *port ) [3936] [2023-11-21 19:47:38,266 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name drop at C: (*drop)(struct tty_port___0 *port ) [3937] [2023-11-21 19:47:38,267 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name activate at C: (*activate)(struct tty_port___0 *port , struct tty_struct___0 *tty ) [3938] [2023-11-21 19:47:38,267 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name destruct at C: (*destruct)(struct tty_port___0 *port ) [3939] [2023-11-21 19:47:38,464 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-4ed3cba-1-100_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i[129647,129660] [2023-11-21 19:47:38,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:47:38,799 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:47:38,913 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name writepages at C: (*writepages)(struct address_space___0 * , struct writeback_control * ) [3504] [2023-11-21 19:47:38,914 WARN L1274 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 ) [3506-3507] [2023-11-21 19:47:38,914 WARN L1274 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 ) [3508-3510] [2023-11-21 19:47:38,914 WARN L1274 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 ) [3511-3512] [2023-11-21 19:47:38,915 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name bmap at C: (*bmap)(struct address_space___0 * , sector_t ) [3513] [2023-11-21 19:47:38,916 WARN L1274 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 * ) [3519-3520] [2023-11-21 19:47:38,916 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name migratepage at C: (*migratepage)(struct address_space___0 * , struct page * , struct page * ) [3521] [2023-11-21 19:47:38,917 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name error_remove_page at C: (*error_remove_page)(struct address_space___0 * , struct page * ) [3524] [2023-11-21 19:47:38,925 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name lookup at C: *(*lookup)(struct tty_driver___0 *driver , struct inode___0 *inode , int idx ) [3838-3839] [2023-11-21 19:47:38,925 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name install at C: (*install)(struct tty_driver___0 *driver , struct tty_struct___0 *tty ) [3840] [2023-11-21 19:47:38,925 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name remove at C: (*remove)(struct tty_driver___0 *driver , struct tty_struct___0 *tty ) [3841] [2023-11-21 19:47:38,926 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name poll_init at C: (*poll_init)(struct tty_driver___0 *driver , int line , char *options ) [3872] [2023-11-21 19:47:38,926 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name poll_get_char at C: (*poll_get_char)(struct tty_driver___0 *driver , int line ) [3873] [2023-11-21 19:47:38,927 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name poll_put_char at C: (*poll_put_char)(struct tty_driver___0 *driver , int line , char ch ) [3874] [2023-11-21 19:47:38,928 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name carrier_raised at C: (*carrier_raised)(struct tty_port___0 *port ) [3934] [2023-11-21 19:47:38,928 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name dtr_rts at C: (*dtr_rts)(struct tty_port___0 *port , int raise ) [3935] [2023-11-21 19:47:38,929 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name shutdown at C: (*shutdown)(struct tty_port___0 *port ) [3936] [2023-11-21 19:47:38,929 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name drop at C: (*drop)(struct tty_port___0 *port ) [3937] [2023-11-21 19:47:38,929 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name activate at C: (*activate)(struct tty_port___0 *port , struct tty_struct___0 *tty ) [3938] [2023-11-21 19:47:38,930 WARN L1274 CHandler]: Detected problem Invalid redeclaration of the name destruct at C: (*destruct)(struct tty_port___0 *port ) [3939] [2023-11-21 19:47:38,975 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-4ed3cba-1-100_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i[129647,129660] [2023-11-21 19:47:39,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:47:39,203 WARN L675 CHandler]: The function kmem_cache_alloc_notrace is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:47:39,211 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:47:39,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:39 WrapperNode [2023-11-21 19:47:39,212 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:47:39,213 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:47:39,213 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:47:39,213 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:47:39,221 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:39" (1/1) ... [2023-11-21 19:47:39,282 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:39" (1/1) ... [2023-11-21 19:47:39,405 INFO L138 Inliner]: procedures = 98, calls = 1034, calls flagged for inlining = 45, calls inlined = 43, statements flattened = 1952 [2023-11-21 19:47:39,406 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:47:39,407 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:47:39,407 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:47:39,407 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:47:39,416 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:39" (1/1) ... [2023-11-21 19:47:39,417 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:39" (1/1) ... [2023-11-21 19:47:39,442 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:39" (1/1) ... [2023-11-21 19:47:39,447 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:39" (1/1) ... [2023-11-21 19:47:39,521 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:39" (1/1) ... [2023-11-21 19:47:39,531 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:39" (1/1) ... [2023-11-21 19:47:39,540 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:39" (1/1) ... [2023-11-21 19:47:39,550 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:39" (1/1) ... [2023-11-21 19:47:39,565 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:47:39,566 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:47:39,566 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:47:39,566 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:47:39,567 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:39" (1/1) ... [2023-11-21 19:47:39,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:47:39,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:39,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:47:39,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:47:39,646 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_open [2023-11-21 19:47:39,646 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_open [2023-11-21 19:47:39,646 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-21 19:47:39,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-21 19:47:39,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 19:47:39,647 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2023-11-21 19:47:39,647 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2023-11-21 19:47:39,647 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2023-11-21 19:47:39,647 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2023-11-21 19:47:39,647 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-21 19:47:39,647 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-21 19:47:39,648 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-21 19:47:39,648 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-21 19:47:39,648 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_disconnect [2023-11-21 19:47:39,648 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_disconnect [2023-11-21 19:47:39,648 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-21 19:47:39,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-21 19:47:39,649 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_disconnect [2023-11-21 19:47:39,649 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_disconnect [2023-11-21 19:47:39,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-21 19:47:39,650 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-21 19:47:39,650 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write_room [2023-11-21 19:47:39,651 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write_room [2023-11-21 19:47:39,651 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 19:47:39,651 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 19:47:39,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:47:39,652 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2023-11-21 19:47:39,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2023-11-21 19:47:39,652 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2023-11-21 19:47:39,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:47:39,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 19:47:39,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:47:39,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 19:47:39,653 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2023-11-21 19:47:39,653 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2023-11-21 19:47:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_resume [2023-11-21 19:47:39,654 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_resume [2023-11-21 19:47:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:47:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 19:47:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2023-11-21 19:47:39,654 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2023-11-21 19:47:39,654 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-21 19:47:39,655 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-21 19:47:39,655 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-11-21 19:47:39,655 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-11-21 19:47:39,656 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2023-11-21 19:47:39,656 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2023-11-21 19:47:39,656 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_write [2023-11-21 19:47:39,656 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_write [2023-11-21 19:47:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_suspend [2023-11-21 19:47:39,657 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_suspend [2023-11-21 19:47:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:47:39,657 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_close [2023-11-21 19:47:39,658 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_close [2023-11-21 19:47:39,658 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-11-21 19:47:39,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-11-21 19:47:39,658 INFO L130 BoogieDeclarations]: Found specification of procedure usb_wwan_chars_in_buffer [2023-11-21 19:47:39,658 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_wwan_chars_in_buffer [2023-11-21 19:47:39,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:47:39,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:47:40,054 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:47:40,061 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:47:40,253 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-21 19:47:40,347 INFO L774 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2023-11-21 19:47:42,592 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:47:43,474 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:47:43,474 INFO L308 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-21 19:47:43,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:47:43 BoogieIcfgContainer [2023-11-21 19:47:43,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:47:43,482 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:47:43,483 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:47:43,487 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:47:43,487 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:47:37" (1/3) ... [2023-11-21 19:47:43,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ba9451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:47:43, skipping insertion in model container [2023-11-21 19:47:43,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:47:39" (2/3) ... [2023-11-21 19:47:43,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ba9451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:47:43, skipping insertion in model container [2023-11-21 19:47:43,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:47:43" (3/3) ... [2023-11-21 19:47:43,494 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-stable-4ed3cba-1-100_1a-drivers--usb--serial--qcserial.ko-entry_point.cil.out.i [2023-11-21 19:47:43,516 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:47:43,517 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 19:47:43,609 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:47:43,618 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@71d898cf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:47:43,618 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 19:47:43,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 315 states, 217 states have (on average 1.4608294930875576) internal successors, (317), 226 states have internal predecessors, (317), 74 states have call successors, (74), 24 states have call predecessors, (74), 22 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-21 19:47:43,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-21 19:47:43,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:43,649 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 19:47:43,649 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:43,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:43,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1552944918, now seen corresponding path program 1 times [2023-11-21 19:47:43,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:43,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908388561] [2023-11-21 19:47:43,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:43,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:44,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-21 19:47:44,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:44,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908388561] [2023-11-21 19:47:44,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908388561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:44,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:44,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 19:47:44,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112809476] [2023-11-21 19:47:44,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:44,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:47:44,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:47:44,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:44,870 INFO L87 Difference]: Start difference. First operand has 315 states, 217 states have (on average 1.4608294930875576) internal successors, (317), 226 states have internal predecessors, (317), 74 states have call successors, (74), 24 states have call predecessors, (74), 22 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:47:45,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:45,226 INFO L93 Difference]: Finished difference Result 836 states and 1232 transitions. [2023-11-21 19:47:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:47:45,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2023-11-21 19:47:45,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:45,246 INFO L225 Difference]: With dead ends: 836 [2023-11-21 19:47:45,247 INFO L226 Difference]: Without dead ends: 529 [2023-11-21 19:47:45,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:47:45,257 INFO L413 NwaCegarLoop]: 391 mSDtfsCounter, 374 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:45,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 752 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 19:47:45,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2023-11-21 19:47:45,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 529. [2023-11-21 19:47:45,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 374 states have (on average 1.4385026737967914) internal successors, (538), 378 states have internal predecessors, (538), 117 states have call successors, (117), 38 states have call predecessors, (117), 37 states have return successors, (116), 116 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-21 19:47:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 771 transitions. [2023-11-21 19:47:45,361 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 771 transitions. Word has length 50 [2023-11-21 19:47:45,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:45,361 INFO L495 AbstractCegarLoop]: Abstraction has 529 states and 771 transitions. [2023-11-21 19:47:45,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:47:45,362 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 771 transitions. [2023-11-21 19:47:45,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-21 19:47:45,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:45,366 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 19:47:45,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:47:45,367 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:45,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:45,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1452576773, now seen corresponding path program 1 times [2023-11-21 19:47:45,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:45,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177893735] [2023-11-21 19:47:45,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:45,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-21 19:47:46,239 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:46,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177893735] [2023-11-21 19:47:46,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177893735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:46,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:47:46,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:47:46,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700045529] [2023-11-21 19:47:46,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:46,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 19:47:46,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:46,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 19:47:46,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:47:46,243 INFO L87 Difference]: Start difference. First operand 529 states and 771 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 19:47:46,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:46,624 INFO L93 Difference]: Finished difference Result 1070 states and 1551 transitions. [2023-11-21 19:47:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:47:46,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2023-11-21 19:47:46,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:46,633 INFO L225 Difference]: With dead ends: 1070 [2023-11-21 19:47:46,633 INFO L226 Difference]: Without dead ends: 547 [2023-11-21 19:47:46,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 19:47:46,639 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 27 mSDsluCounter, 1085 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:46,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1452 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:47:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-11-21 19:47:46,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 543. [2023-11-21 19:47:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 383 states have (on average 1.4308093994778068) internal successors, (548), 387 states have internal predecessors, (548), 119 states have call successors, (119), 41 states have call predecessors, (119), 40 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2023-11-21 19:47:46,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 785 transitions. [2023-11-21 19:47:46,754 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 785 transitions. Word has length 50 [2023-11-21 19:47:46,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:46,754 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 785 transitions. [2023-11-21 19:47:46,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-21 19:47:46,755 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 785 transitions. [2023-11-21 19:47:46,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-21 19:47:46,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:46,763 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 19:47:46,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:47:46,763 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:46,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:46,764 INFO L85 PathProgramCache]: Analyzing trace with hash 246045040, now seen corresponding path program 1 times [2023-11-21 19:47:46,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:46,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962316626] [2023-11-21 19:47:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:46,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:47,600 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 19:47:47,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:47,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962316626] [2023-11-21 19:47:47,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962316626] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:47:47,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740140775] [2023-11-21 19:47:47,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:47,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:47,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:47,605 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:47,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 19:47:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:48,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 2293 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 19:47:48,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:48,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 19:47:48,442 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 19:47:48,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740140775] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:47:48,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 19:47:48,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-11-21 19:47:48,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466371363] [2023-11-21 19:47:48,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:47:48,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 19:47:48,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:47:48,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 19:47:48,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 19:47:48,448 INFO L87 Difference]: Start difference. First operand 543 states and 785 transitions. Second operand has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:47:48,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:47:48,834 INFO L93 Difference]: Finished difference Result 1062 states and 1543 transitions. [2023-11-21 19:47:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 19:47:48,835 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2023-11-21 19:47:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:47:48,847 INFO L225 Difference]: With dead ends: 1062 [2023-11-21 19:47:48,847 INFO L226 Difference]: Without dead ends: 544 [2023-11-21 19:47:48,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:47:48,858 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 1 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:47:48,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1098 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:47:48,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2023-11-21 19:47:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2023-11-21 19:47:48,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 384 states have (on average 1.4296875) internal successors, (549), 388 states have internal predecessors, (549), 119 states have call successors, (119), 41 states have call predecessors, (119), 40 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2023-11-21 19:47:48,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 786 transitions. [2023-11-21 19:47:48,918 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 786 transitions. Word has length 54 [2023-11-21 19:47:48,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:47:48,919 INFO L495 AbstractCegarLoop]: Abstraction has 544 states and 786 transitions. [2023-11-21 19:47:48,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.0) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-21 19:47:48,920 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 786 transitions. [2023-11-21 19:47:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-21 19:47:48,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:47:48,923 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-21 19:47:48,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 19:47:49,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:49,143 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 19:47:49,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:47:49,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1346016228, now seen corresponding path program 1 times [2023-11-21 19:47:49,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:47:49,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607813251] [2023-11-21 19:47:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:49,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:47:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 19:47:50,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:47:50,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607813251] [2023-11-21 19:47:50,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607813251] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 19:47:50,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048781679] [2023-11-21 19:47:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:47:50,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 19:47:50,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:47:50,089 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 19:47:50,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fb9c729f-ca7d-446c-865b-8f7154d9e825/bin/utaipan-verify-QoSU8krkJ5/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 19:47:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:47:51,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 2323 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 19:47:51,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 19:47:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 19:47:51,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 19:47:51,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-21 19:47:51,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048781679] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 19:47:51,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1894717019] [2023-11-21 19:47:51,230 INFO L159 IcfgInterpreter]: Started Sifa with 44 locations of interest [2023-11-21 19:47:51,230 INFO L166 IcfgInterpreter]: Building call graph [2023-11-21 19:47:51,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-21 19:47:51,242 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-21 19:47:51,243 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs