./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash c92cf9b42919bd0ad39ed67eff3f7cfedcded9ddd3bd80f0a39950ee91c5e90b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:27:31,203 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:27:31,294 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:27:31,301 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:27:31,301 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:27:31,331 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:27:31,331 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:27:31,332 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:27:31,333 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:27:31,334 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:27:31,334 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:27:31,335 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:27:31,335 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:27:31,336 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:27:31,336 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:27:31,337 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:27:31,338 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:27:31,338 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:27:31,339 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:27:31,339 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:27:31,340 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:27:31,341 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:27:31,342 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:27:31,342 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:27:31,343 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:27:31,343 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:27:31,344 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:27:31,344 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:27:31,345 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:27:31,345 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:27:31,346 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:27:31,346 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:27:31,347 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:27:31,347 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:27:31,348 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:27:31,348 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:27:31,349 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:27:31,349 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:27:31,350 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:27:31,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:27:31,351 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:27:31,351 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:27:31,352 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:27:31,352 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:27:31,352 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_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c92cf9b42919bd0ad39ed67eff3f7cfedcded9ddd3bd80f0a39950ee91c5e90b [2023-11-23 21:27:31,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:27:31,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:27:31,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:27:31,683 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:27:31,683 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:27:31,685 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2023-11-23 21:27:34,961 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:27:35,698 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:27:35,699 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2023-11-23 21:27:35,744 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire/data/c1f21f542/53766d8251d8486f9df2d9d83eccd66a/FLAG1ee591676 [2023-11-23 21:27:35,761 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire/data/c1f21f542/53766d8251d8486f9df2d9d83eccd66a [2023-11-23 21:27:35,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:27:35,766 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:27:35,767 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:27:35,768 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:27:35,774 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:27:35,775 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:27:35" (1/1) ... [2023-11-23 21:27:35,776 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59789106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:35, skipping insertion in model container [2023-11-23 21:27:35,776 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:27:35" (1/1) ... [2023-11-23 21:27:35,982 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:27:36,862 WARN L635 FunctionHandler]: implicit declaration of function ldv_undef_int [2023-11-23 21:27:36,867 WARN L635 FunctionHandler]: implicit declaration of function ldv_assume [2023-11-23 21:27:38,774 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_ffba4d1a-19b6-4503-990f-390914a9894e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i[319906,319919] [2023-11-23 21:27:38,873 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:27:38,931 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:27:39,203 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [6278] [2023-11-23 21:27:39,206 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [6285] [2023-11-23 21:27:39,207 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %2, %0; setc %1": "+m" (*addr), "=qm" (c): "Ir" (nr): "memory"); [6293-6294] [2023-11-23 21:27:39,211 WARN L635 FunctionHandler]: implicit declaration of function ldv_undef_int [2023-11-23 21:27:39,212 WARN L635 FunctionHandler]: implicit declaration of function ldv_assume [2023-11-23 21:27:39,224 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; incl %0": "+m" (v->counter)); [6519] [2023-11-23 21:27:39,237 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/linux/mm.h"), "i" (543), "i" (12UL)); [6705-6706] [2023-11-23 21:27:39,277 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"include/linux/netdevice.h"), "i" (507), "i" (12UL)); [7074-7075] [2023-11-23 21:27:39,277 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("": : : "memory"); [7080] [2023-11-23 21:27:39,336 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/home/ldvuser/mutilin/launch/work/current--X--drivers/--X--defaultlinux-4.2-rc1.tar.xz--X--43_2a--X--cpachecker/linux-4.2-rc1.tar.xz/csd_deg_dscv/12156/dscv_tempdir/dscv/ri/43_2a/drivers/net/xen-netfront.c"), "i" (303), "i" (12UL)); [7567-7568] [2023-11-23 21:27:39,337 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/home/ldvuser/mutilin/launch/work/current--X--drivers/--X--defaultlinux-4.2-rc1.tar.xz--X--43_2a--X--cpachecker/linux-4.2-rc1.tar.xz/csd_deg_dscv/12156/dscv_tempdir/dscv/ri/43_2a/drivers/net/xen-netfront.c"), "i" (307), "i" (12UL)); [7578-7579] [2023-11-23 21:27:39,341 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("sfence": : : "memory"); [7607] [2023-11-23 21:27:39,341 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("sfence": : : "memory"); [7610] [2023-11-23 21:27:39,342 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("mfence": : : "memory"); [7612] [2023-11-23 21:27:39,357 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/home/ldvuser/mutilin/launch/work/current--X--drivers/--X--defaultlinux-4.2-rc1.tar.xz--X--43_2a--X--cpachecker/linux-4.2-rc1.tar.xz/csd_deg_dscv/12156/dscv_tempdir/dscv/ri/43_2a/drivers/net/xen-netfront.c"), "i" (369), "i" (12UL)); [7683-7684] [2023-11-23 21:27:39,358 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("lfence": : : "memory"); [7691] [2023-11-23 21:27:39,361 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/home/ldvuser/mutilin/launch/work/current--X--drivers/--X--defaultlinux-4.2-rc1.tar.xz--X--43_2a--X--cpachecker/linux-4.2-rc1.tar.xz/csd_deg_dscv/12156/dscv_tempdir/dscv/ri/43_2a/drivers/net/xen-netfront.c"), "i" (388), "i" (12UL)); [7707-7708] [2023-11-23 21:27:39,365 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("mfence": : : "memory"); [7729] [2023-11-23 21:27:39,368 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/home/ldvuser/mutilin/launch/work/current--X--drivers/--X--defaultlinux-4.2-rc1.tar.xz--X--43_2a--X--cpachecker/linux-4.2-rc1.tar.xz/csd_deg_dscv/12156/dscv_tempdir/dscv/ri/43_2a/drivers/net/xen-netfront.c"), "i" (431), "i" (12UL)); [7765-7766] [2023-11-23 21:27:39,375 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("add %%gs:%1, %0": "=r" (tcp_ptr__): "m" (this_cpu_off), "0" (np->tx_stats)); [7916] [2023-11-23 21:27:39,388 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("sfence": : : "memory"); [8051] [2023-11-23 21:27:39,389 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("mfence": : : "memory"); [8053] [2023-11-23 21:27:39,394 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/home/ldvuser/mutilin/launch/work/current--X--drivers/--X--defaultlinux-4.2-rc1.tar.xz--X--43_2a--X--cpachecker/linux-4.2-rc1.tar.xz/csd_deg_dscv/12156/dscv_tempdir/dscv/ri/43_2a/drivers/net/xen-netfront.c"), "i" (659), "i" (12UL)); [8116-8117] [2023-11-23 21:27:39,446 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/home/ldvuser/mutilin/launch/work/current--X--drivers/--X--defaultlinux-4.2-rc1.tar.xz--X--43_2a--X--cpachecker/linux-4.2-rc1.tar.xz/csd_deg_dscv/12156/dscv_tempdir/dscv/ri/43_2a/drivers/net/xen-netfront.c"), "i" (756), "i" (12UL)); [8256-8257] [2023-11-23 21:27:39,453 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/home/ldvuser/mutilin/launch/work/current--X--drivers/--X--defaultlinux-4.2-rc1.tar.xz--X--43_2a--X--cpachecker/linux-4.2-rc1.tar.xz/csd_deg_dscv/12156/dscv_tempdir/dscv/ri/43_2a/drivers/net/xen-netfront.c"), "i" (836), "i" (12UL)); [8373-8374] [2023-11-23 21:27:39,454 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/home/ldvuser/mutilin/launch/work/current--X--drivers/--X--defaultlinux-4.2-rc1.tar.xz--X--43_2a--X--cpachecker/linux-4.2-rc1.tar.xz/csd_deg_dscv/12156/dscv_tempdir/dscv/ri/43_2a/drivers/net/xen-netfront.c"), "i" (839), "i" (12UL)); [8385-8386] [2023-11-23 21:27:39,457 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("add %%gs:%1, %0": "=r" (tcp_ptr__): "m" (this_cpu_off), "0" ((queue->info)->rx_stats)); [8448] [2023-11-23 21:27:39,475 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("lfence": : : "memory"); [8520] [2023-11-23 21:27:39,481 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("mfence": : : "memory"); [8602] [2023-11-23 21:27:39,483 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("": "=r" (__ptr): "0" (np->rx_stats)); [8656] [2023-11-23 21:27:39,484 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("": "=r" (__ptr___0): "0" (np->tx_stats)); [8659] [2023-11-23 21:27:39,505 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("": "=r" (__ptr): "0" (pcpu_stats)); [8981] [2023-11-23 21:27:39,506 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("": "=r" (__ptr___0): "0" (pcpu_stats___0)); [9005] [2023-11-23 21:27:39,609 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_ffba4d1a-19b6-4503-990f-390914a9894e/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i[319906,319919] [2023-11-23 21:27:39,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:27:39,838 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:27:39,838 WARN L675 CHandler]: The function ldv_assume is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:27:39,847 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:27:39,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:39 WrapperNode [2023-11-23 21:27:39,848 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:27:39,850 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:27:39,850 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:27:39,850 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:27:39,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:39" (1/1) ... [2023-11-23 21:27:39,989 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:39" (1/1) ... [2023-11-23 21:27:40,263 INFO L138 Inliner]: procedures = 337, calls = 1940, calls flagged for inlining = 167, calls inlined = 140, statements flattened = 4841 [2023-11-23 21:27:40,264 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:27:40,265 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:27:40,265 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:27:40,265 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:27:40,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:39" (1/1) ... [2023-11-23 21:27:40,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:39" (1/1) ... [2023-11-23 21:27:40,349 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:39" (1/1) ... [2023-11-23 21:27:40,349 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:39" (1/1) ... [2023-11-23 21:27:40,534 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:39" (1/1) ... [2023-11-23 21:27:40,576 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:39" (1/1) ... [2023-11-23 21:27:40,636 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:39" (1/1) ... [2023-11-23 21:27:40,670 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:39" (1/1) ... [2023-11-23 21:27:40,718 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:27:40,722 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:27:40,722 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:27:40,723 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:27:40,724 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:39" (1/1) ... [2023-11-23 21:27:40,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:27:40,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:27:40,766 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:27:40,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffba4d1a-19b6-4503-990f-390914a9894e/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:27:40,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:27:40,815 INFO L130 BoogieDeclarations]: Found specification of procedure get_page [2023-11-23 21:27:40,816 INFO L138 BoogieDeclarations]: Found implementation of procedure get_page [2023-11-23 21:27:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:27:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-11-23 21:27:40,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-11-23 21:27:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-11-23 21:27:40,817 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-11-23 21:27:40,817 INFO L130 BoogieDeclarations]: Found specification of procedure napi_schedule [2023-11-23 21:27:40,817 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_schedule [2023-11-23 21:27:40,817 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_change_mtu [2023-11-23 21:27:40,817 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_change_mtu [2023-11-23 21:27:40,818 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2023-11-23 21:27:40,818 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2023-11-23 21:27:40,818 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_write [2023-11-23 21:27:40,818 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_write [2023-11-23 21:27:40,818 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2023-11-23 21:27:40,819 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2023-11-23 21:27:40,819 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-11-23 21:27:40,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-11-23 21:27:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:27:40,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:27:40,877 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2023-11-23 21:27:40,877 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2023-11-23 21:27:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_scanf [2023-11-23 21:27:40,878 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_scanf [2023-11-23 21:27:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_fetch_retry_irq [2023-11-23 21:27:40,878 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_fetch_retry_irq [2023-11-23 21:27:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure bind_evtchn_to_irqhandler [2023-11-23 21:27:40,878 INFO L138 BoogieDeclarations]: Found implementation of procedure bind_evtchn_to_irqhandler [2023-11-23 21:27:40,878 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_transaction_end [2023-11-23 21:27:40,879 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_transaction_end [2023-11-23 21:27:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_remove [2023-11-23 21:27:40,879 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_remove [2023-11-23 21:27:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure __alloc_percpu [2023-11-23 21:27:40,879 INFO L138 BoogieDeclarations]: Found implementation of procedure __alloc_percpu [2023-11-23 21:27:40,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:27:40,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:27:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_make_txreqs [2023-11-23 21:27:40,880 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_make_txreqs [2023-11-23 21:27:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_destroy_queues [2023-11-23 21:27:40,880 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_destroy_queues [2023-11-23 21:27:40,880 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2023-11-23 21:27:40,881 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2023-11-23 21:27:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2023-11-23 21:27:40,881 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2023-11-23 21:27:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_grant_ring [2023-11-23 21:27:40,881 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_grant_ring [2023-11-23 21:27:40,881 INFO L130 BoogieDeclarations]: Found specification of procedure free_percpu [2023-11-23 21:27:40,882 INFO L138 BoogieDeclarations]: Found implementation of procedure free_percpu [2023-11-23 21:27:40,882 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2023-11-23 21:27:40,882 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2023-11-23 21:27:40,882 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_claim_grant_reference [2023-11-23 21:27:40,882 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_claim_grant_reference [2023-11-23 21:27:40,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-11-23 21:27:40,883 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-11-23 21:27:40,883 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-23 21:27:40,883 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-23 21:27:40,883 INFO L130 BoogieDeclarations]: Found specification of procedure netif_set_real_num_tx_queues [2023-11-23 21:27:40,883 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_set_real_num_tx_queues [2023-11-23 21:27:40,883 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_end_foreign_access [2023-11-23 21:27:40,883 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_end_foreign_access [2023-11-23 21:27:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_disconnect_backend [2023-11-23 21:27:40,884 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_disconnect_backend [2023-11-23 21:27:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_get_stats64 [2023-11-23 21:27:40,884 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_get_stats64 [2023-11-23 21:27:40,884 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 21:27:40,886 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 21:27:40,886 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_alloc_evtchn [2023-11-23 21:27:40,886 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_alloc_evtchn [2023-11-23 21:27:40,886 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2023-11-23 21:27:40,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2023-11-23 21:27:40,887 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_alloc_grant_references [2023-11-23 21:27:40,887 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_alloc_grant_references [2023-11-23 21:27:40,891 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2023-11-23 21:27:40,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2023-11-23 21:27:40,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:27:40,891 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_printf [2023-11-23 21:27:40,891 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_printf [2023-11-23 21:27:40,891 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-11-23 21:27:40,892 INFO L130 BoogieDeclarations]: Found specification of procedure netfront_tx_slot_available [2023-11-23 21:27:40,893 INFO L138 BoogieDeclarations]: Found implementation of procedure netfront_tx_slot_available [2023-11-23 21:27:40,893 INFO L130 BoogieDeclarations]: Found specification of procedure notify_remote_via_irq [2023-11-23 21:27:40,893 INFO L138 BoogieDeclarations]: Found implementation of procedure notify_remote_via_irq [2023-11-23 21:27:40,893 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_release_grant_reference [2023-11-23 21:27:40,893 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_release_grant_reference [2023-11-23 21:27:40,893 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2023-11-23 21:27:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2023-11-23 21:27:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2023-11-23 21:27:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2023-11-23 21:27:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_can_sg [2023-11-23 21:27:40,894 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_can_sg [2023-11-23 21:27:40,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:27:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2023-11-23 21:27:40,895 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2023-11-23 21:27:40,895 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2023-11-23 21:27:40,895 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2023-11-23 21:27:40,897 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-11-23 21:27:40,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-11-23 21:27:40,897 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_rxidx [2023-11-23 21:27:40,898 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_rxidx [2023-11-23 21:27:40,898 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-11-23 21:27:40,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-11-23 21:27:40,898 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 21:27:40,898 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 21:27:40,898 INFO L130 BoogieDeclarations]: Found specification of procedure __pskb_pull_tail [2023-11-23 21:27:40,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __pskb_pull_tail [2023-11-23 21:27:40,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:27:40,899 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2023-11-23 21:27:40,900 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2023-11-23 21:27:40,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:27:40,904 INFO L130 BoogieDeclarations]: Found specification of procedure write_queue_xenstore_keys [2023-11-23 21:27:40,904 INFO L138 BoogieDeclarations]: Found implementation of procedure write_queue_xenstore_keys [2023-11-23 21:27:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:27:40,905 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:27:40,905 INFO L130 BoogieDeclarations]: Found specification of procedure pfn_to_mfn [2023-11-23 21:27:40,905 INFO L138 BoogieDeclarations]: Found implementation of procedure pfn_to_mfn [2023-11-23 21:27:40,906 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2023-11-23 21:27:40,907 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2023-11-23 21:27:40,908 INFO L130 BoogieDeclarations]: Found specification of procedure add_id_to_freelist [2023-11-23 21:27:40,913 INFO L138 BoogieDeclarations]: Found implementation of procedure add_id_to_freelist [2023-11-23 21:27:40,913 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_alloc_rx_buffers [2023-11-23 21:27:40,913 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_alloc_rx_buffers [2023-11-23 21:27:40,913 INFO L130 BoogieDeclarations]: Found specification of procedure skb_entry_set_link [2023-11-23 21:27:40,913 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_entry_set_link [2023-11-23 21:27:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-11-23 21:27:40,914 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-11-23 21:27:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-11-23 21:27:40,914 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-11-23 21:27:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure store_rxbuf [2023-11-23 21:27:40,914 INFO L138 BoogieDeclarations]: Found implementation of procedure store_rxbuf [2023-11-23 21:27:40,914 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2023-11-23 21:27:40,915 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2023-11-23 21:27:40,915 INFO L130 BoogieDeclarations]: Found specification of procedure free_pages [2023-11-23 21:27:40,915 INFO L138 BoogieDeclarations]: Found implementation of procedure free_pages [2023-11-23 21:27:40,915 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_end_foreign_access_ref [2023-11-23 21:27:40,915 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_end_foreign_access_ref [2023-11-23 21:27:40,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:27:40,916 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_make_one_txreq [2023-11-23 21:27:40,916 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_make_one_txreq [2023-11-23 21:27:40,916 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2023-11-23 21:27:40,916 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2023-11-23 21:27:40,916 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_free_grant_references [2023-11-23 21:27:40,916 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_free_grant_references [2023-11-23 21:27:40,917 INFO L130 BoogieDeclarations]: Found specification of procedure simple_strtoul [2023-11-23 21:27:40,917 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_strtoul [2023-11-23 21:27:40,917 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2023-11-23 21:27:40,917 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2023-11-23 21:27:40,917 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-23 21:27:40,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-23 21:27:40,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:27:40,919 INFO L130 BoogieDeclarations]: Found specification of procedure unbind_from_irqhandler [2023-11-23 21:27:40,919 INFO L138 BoogieDeclarations]: Found implementation of procedure unbind_from_irqhandler [2023-11-23 21:27:40,920 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2023-11-23 21:27:40,920 INFO L130 BoogieDeclarations]: Found specification of procedure get_zeroed_page [2023-11-23 21:27:40,920 INFO L138 BoogieDeclarations]: Found implementation of procedure get_zeroed_page [2023-11-23 21:27:40,920 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_free_netdev [2023-11-23 21:27:40,921 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_free_netdev [2023-11-23 21:27:40,921 INFO L130 BoogieDeclarations]: Found specification of procedure netback_changed [2023-11-23 21:27:40,921 INFO L138 BoogieDeclarations]: Found implementation of procedure netback_changed [2023-11-23 21:27:40,921 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_poll_controller [2023-11-23 21:27:40,921 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_poll_controller [2023-11-23 21:27:40,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:27:40,922 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_page [2023-11-23 21:27:40,922 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_page [2023-11-23 21:27:40,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:27:40,922 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:27:40,922 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_select_queue [2023-11-23 21:27:40,922 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_select_queue [2023-11-23 21:27:40,922 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_end_access [2023-11-23 21:27:40,923 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_end_access [2023-11-23 21:27:40,923 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-23 21:27:40,923 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-23 21:27:40,923 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-11-23 21:27:40,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-11-23 21:27:40,923 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2023-11-23 21:27:40,923 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2023-11-23 21:27:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_init [2023-11-23 21:27:40,924 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_init [2023-11-23 21:27:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:27:40,924 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:27:40,924 INFO L130 BoogieDeclarations]: Found specification of procedure skb_add_rx_frag [2023-11-23 21:27:40,924 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_add_rx_frag [2023-11-23 21:27:40,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:27:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-11-23 21:27:40,926 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-11-23 21:27:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2023-11-23 21:27:40,926 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2023-11-23 21:27:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2023-11-23 21:27:40,926 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2023-11-23 21:27:40,926 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:27:40,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:27:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-11-23 21:27:40,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-11-23 21:27:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_fix_features [2023-11-23 21:27:40,927 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_fix_features [2023-11-23 21:27:40,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:27:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-11-23 21:27:40,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-11-23 21:27:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure get_phys_to_machine [2023-11-23 21:27:40,928 INFO L138 BoogieDeclarations]: Found implementation of procedure get_phys_to_machine [2023-11-23 21:27:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:27:40,928 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2023-11-23 21:27:40,928 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2023-11-23 21:27:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure cpumask_next [2023-11-23 21:27:40,929 INFO L138 BoogieDeclarations]: Found implementation of procedure cpumask_next [2023-11-23 21:27:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-11-23 21:27:40,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-11-23 21:27:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:27:40,929 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headlen [2023-11-23 21:27:40,929 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headlen [2023-11-23 21:27:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2023-11-23 21:27:40,930 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2023-11-23 21:27:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure show_rxbuf [2023-11-23 21:27:40,930 INFO L138 BoogieDeclarations]: Found implementation of procedure show_rxbuf [2023-11-23 21:27:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure skb_is_gso [2023-11-23 21:27:40,930 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_is_gso [2023-11-23 21:27:40,930 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2023-11-23 21:27:40,931 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2023-11-23 21:27:40,931 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_grant_foreign_access_ref [2023-11-23 21:27:40,931 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_grant_foreign_access_ref [2023-11-23 21:27:40,931 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2023-11-23 21:27:40,931 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2023-11-23 21:27:40,931 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_set_features [2023-11-23 21:27:40,932 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_set_features [2023-11-23 21:27:40,932 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size [2023-11-23 21:27:40,932 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size [2023-11-23 21:27:40,932 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_fetch_begin_irq [2023-11-23 21:27:40,932 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_fetch_begin_irq [2023-11-23 21:27:40,932 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-11-23 21:27:40,932 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-11-23 21:27:40,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:27:40,933 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_dev_fatal [2023-11-23 21:27:40,933 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_dev_fatal [2023-11-23 21:27:40,933 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_free_evtchn [2023-11-23 21:27:40,933 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_free_evtchn [2023-11-23 21:27:40,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:27:40,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:27:40,939 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_tx_buf_gc [2023-11-23 21:27:40,939 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_tx_buf_gc [2023-11-23 21:27:40,940 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2023-11-23 21:27:40,940 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2023-11-23 21:27:40,940 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 21:27:40,940 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 21:27:41,863 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:27:41,870 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:27:43,109 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-11-23 21:27:46,404 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:27:47,754 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:27:47,754 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-23 21:27:47,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:27:47 BoogieIcfgContainer [2023-11-23 21:27:47,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:27:47,759 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:27:47,759 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:27:47,763 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:27:47,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:27:35" (1/3) ... [2023-11-23 21:27:47,764 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f10dd21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:27:47, skipping insertion in model container [2023-11-23 21:27:47,764 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:27:39" (2/3) ... [2023-11-23 21:27:47,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f10dd21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:27:47, skipping insertion in model container [2023-11-23 21:27:47,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:27:47" (3/3) ... [2023-11-23 21:27:47,766 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2023-11-23 21:27:47,788 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:27:47,788 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:27:47,880 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:27:47,888 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;@9e3b65a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:27:47,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:27:47,900 INFO L276 IsEmpty]: Start isEmpty. Operand has 1318 states, 814 states have (on average 1.3427518427518428) internal successors, (1093), 853 states have internal predecessors, (1093), 390 states have call successors, (390), 113 states have call predecessors, (390), 112 states have return successors, (381), 374 states have call predecessors, (381), 381 states have call successors, (381) [2023-11-23 21:27:47,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-11-23 21:27:47,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:47,960 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 9, 9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:47,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:47,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1752766118, now seen corresponding path program 1 times [2023-11-23 21:27:47,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:47,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275294863] [2023-11-23 21:27:47,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:47,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2023-11-23 21:27:49,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:49,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275294863] [2023-11-23 21:27:49,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275294863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:49,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:49,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:27:49,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173171756] [2023-11-23 21:27:49,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:49,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:27:49,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:49,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:27:49,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:27:49,513 INFO L87 Difference]: Start difference. First operand has 1318 states, 814 states have (on average 1.3427518427518428) internal successors, (1093), 853 states have internal predecessors, (1093), 390 states have call successors, (390), 113 states have call predecessors, (390), 112 states have return successors, (381), 374 states have call predecessors, (381), 381 states have call successors, (381) Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-11-23 21:27:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:51,867 INFO L93 Difference]: Finished difference Result 3278 states and 4631 transitions. [2023-11-23 21:27:51,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:27:51,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) Word has length 343 [2023-11-23 21:27:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:51,901 INFO L225 Difference]: With dead ends: 3278 [2023-11-23 21:27:51,901 INFO L226 Difference]: Without dead ends: 1975 [2023-11-23 21:27:51,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:27:51,918 INFO L413 NwaCegarLoop]: 1622 mSDtfsCounter, 1038 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 3148 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:51,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1038 Valid, 3148 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-23 21:27:51,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2023-11-23 21:27:52,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1971. [2023-11-23 21:27:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1971 states, 1234 states have (on average 1.3322528363047001) internal successors, (1644), 1272 states have internal predecessors, (1644), 554 states have call successors, (554), 183 states have call predecessors, (554), 182 states have return successors, (553), 542 states have call predecessors, (553), 553 states have call successors, (553) [2023-11-23 21:27:52,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1971 states to 1971 states and 2751 transitions. [2023-11-23 21:27:52,139 INFO L78 Accepts]: Start accepts. Automaton has 1971 states and 2751 transitions. Word has length 343 [2023-11-23 21:27:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:52,144 INFO L495 AbstractCegarLoop]: Abstraction has 1971 states and 2751 transitions. [2023-11-23 21:27:52,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 2 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (38), 2 states have call predecessors, (38), 2 states have call successors, (38) [2023-11-23 21:27:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1971 states and 2751 transitions. [2023-11-23 21:27:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2023-11-23 21:27:52,161 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:52,161 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 9, 9, 9, 3, 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] [2023-11-23 21:27:52,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:27:52,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:52,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:52,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1323809259, now seen corresponding path program 1 times [2023-11-23 21:27:52,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:52,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250227698] [2023-11-23 21:27:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:52,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1464 trivial. 0 not checked. [2023-11-23 21:27:53,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:53,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250227698] [2023-11-23 21:27:53,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250227698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:53,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:53,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:27:53,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752631678] [2023-11-23 21:27:53,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:53,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:27:53,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:53,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:27:53,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:27:53,011 INFO L87 Difference]: Start difference. First operand 1971 states and 2751 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-11-23 21:27:55,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:27:55,000 INFO L93 Difference]: Finished difference Result 4921 states and 6855 transitions. [2023-11-23 21:27:55,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:27:55,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 346 [2023-11-23 21:27:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:27:55,026 INFO L225 Difference]: With dead ends: 4921 [2023-11-23 21:27:55,026 INFO L226 Difference]: Without dead ends: 3008 [2023-11-23 21:27:55,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:27:55,037 INFO L413 NwaCegarLoop]: 1768 mSDtfsCounter, 1331 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1331 SdHoareTripleChecker+Valid, 3184 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:27:55,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1331 Valid, 3184 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-23 21:27:55,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2023-11-23 21:27:55,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2996. [2023-11-23 21:27:55,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2996 states, 1895 states have (on average 1.3403693931398417) internal successors, (2540), 1967 states have internal predecessors, (2540), 817 states have call successors, (817), 286 states have call predecessors, (817), 283 states have return successors, (816), 788 states have call predecessors, (816), 816 states have call successors, (816) [2023-11-23 21:27:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 4173 transitions. [2023-11-23 21:27:55,206 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 4173 transitions. Word has length 346 [2023-11-23 21:27:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:27:55,211 INFO L495 AbstractCegarLoop]: Abstraction has 2996 states and 4173 transitions. [2023-11-23 21:27:55,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2023-11-23 21:27:55,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 4173 transitions. [2023-11-23 21:27:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2023-11-23 21:27:55,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:27:55,225 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 9, 9, 9, 9, 9, 9, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:27:55,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:27:55,226 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:27:55,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:27:55,238 INFO L85 PathProgramCache]: Analyzing trace with hash 370298061, now seen corresponding path program 1 times [2023-11-23 21:27:55,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:27:55,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811700097] [2023-11-23 21:27:55,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:27:55,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:27:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:27:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2573 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2568 trivial. 0 not checked. [2023-11-23 21:27:56,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:27:56,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811700097] [2023-11-23 21:27:56,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811700097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:27:56,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:27:56,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:27:56,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544424546] [2023-11-23 21:27:56,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:27:56,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:27:56,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:27:56,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:27:56,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:27:56,395 INFO L87 Difference]: Start difference. First operand 2996 states and 4173 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2023-11-23 21:28:00,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:00,408 INFO L93 Difference]: Finished difference Result 5946 states and 8279 transitions. [2023-11-23 21:28:00,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:00,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 431 [2023-11-23 21:28:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:00,432 INFO L225 Difference]: With dead ends: 5946 [2023-11-23 21:28:00,432 INFO L226 Difference]: Without dead ends: 2996 [2023-11-23 21:28:00,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:00,446 INFO L413 NwaCegarLoop]: 1585 mSDtfsCounter, 3 mSDsluCounter, 3166 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4751 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:00,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4751 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2023-11-23 21:28:00,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2996 states. [2023-11-23 21:28:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2996 to 2996. [2023-11-23 21:28:00,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2996 states, 1895 states have (on average 1.3361477572559366) internal successors, (2532), 1967 states have internal predecessors, (2532), 817 states have call successors, (817), 286 states have call predecessors, (817), 283 states have return successors, (816), 788 states have call predecessors, (816), 816 states have call successors, (816) [2023-11-23 21:28:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2996 states to 2996 states and 4165 transitions. [2023-11-23 21:28:00,678 INFO L78 Accepts]: Start accepts. Automaton has 2996 states and 4165 transitions. Word has length 431 [2023-11-23 21:28:00,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:00,679 INFO L495 AbstractCegarLoop]: Abstraction has 2996 states and 4165 transitions. [2023-11-23 21:28:00,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (47), 2 states have call predecessors, (47), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2023-11-23 21:28:00,680 INFO L276 IsEmpty]: Start isEmpty. Operand 2996 states and 4165 transitions. [2023-11-23 21:28:00,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2023-11-23 21:28:00,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:00,694 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 9, 9, 9, 9, 9, 9, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:00,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:28:00,694 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:00,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:00,695 INFO L85 PathProgramCache]: Analyzing trace with hash -272553141, now seen corresponding path program 1 times [2023-11-23 21:28:00,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:00,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727931960] [2023-11-23 21:28:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:00,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2573 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2568 trivial. 0 not checked. [2023-11-23 21:28:01,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:01,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727931960] [2023-11-23 21:28:01,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727931960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:01,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:01,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:01,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169782456] [2023-11-23 21:28:01,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:01,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:01,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:01,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:01,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:01,521 INFO L87 Difference]: Start difference. First operand 2996 states and 4165 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2023-11-23 21:28:03,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:28:06,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:06,023 INFO L93 Difference]: Finished difference Result 7866 states and 10923 transitions. [2023-11-23 21:28:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:06,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) Word has length 438 [2023-11-23 21:28:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:06,074 INFO L225 Difference]: With dead ends: 7866 [2023-11-23 21:28:06,074 INFO L226 Difference]: Without dead ends: 4928 [2023-11-23 21:28:06,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:06,097 INFO L413 NwaCegarLoop]: 2480 mSDtfsCounter, 1665 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 3956 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:06,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1665 Valid, 3956 Invalid, 653 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [13 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-23 21:28:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2023-11-23 21:28:06,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 4923. [2023-11-23 21:28:06,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4923 states, 3117 states have (on average 1.3333333333333333) internal successors, (4156), 3240 states have internal predecessors, (4156), 1333 states have call successors, (1333), 475 states have call predecessors, (1333), 472 states have return successors, (1332), 1288 states have call predecessors, (1332), 1332 states have call successors, (1332) [2023-11-23 21:28:06,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4923 states to 4923 states and 6821 transitions. [2023-11-23 21:28:06,488 INFO L78 Accepts]: Start accepts. Automaton has 4923 states and 6821 transitions. Word has length 438 [2023-11-23 21:28:06,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:06,491 INFO L495 AbstractCegarLoop]: Abstraction has 4923 states and 6821 transitions. [2023-11-23 21:28:06,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (48), 2 states have call predecessors, (48), 1 states have return successors, (45), 3 states have call predecessors, (45), 3 states have call successors, (45) [2023-11-23 21:28:06,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4923 states and 6821 transitions. [2023-11-23 21:28:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-11-23 21:28:06,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:06,507 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 9, 9, 9, 9, 9, 9, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:06,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:28:06,507 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:06,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:06,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1545130855, now seen corresponding path program 1 times [2023-11-23 21:28:06,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:06,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796557732] [2023-11-23 21:28:06,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:06,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2573 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2573 trivial. 0 not checked. [2023-11-23 21:28:08,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:08,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796557732] [2023-11-23 21:28:08,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796557732] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:08,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:08,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:28:08,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826460537] [2023-11-23 21:28:08,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:08,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:08,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:08,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:08,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:08,551 INFO L87 Difference]: Start difference. First operand 4923 states and 6821 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 3 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-23 21:28:11,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:11,574 INFO L93 Difference]: Finished difference Result 5264 states and 7135 transitions. [2023-11-23 21:28:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:11,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 3 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) Word has length 436 [2023-11-23 21:28:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:11,613 INFO L225 Difference]: With dead ends: 5264 [2023-11-23 21:28:11,614 INFO L226 Difference]: Without dead ends: 5261 [2023-11-23 21:28:11,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:11,618 INFO L413 NwaCegarLoop]: 1613 mSDtfsCounter, 1341 mSDsluCounter, 1967 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1341 SdHoareTripleChecker+Valid, 3580 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:11,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1341 Valid, 3580 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-23 21:28:11,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2023-11-23 21:28:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2023-11-23 21:28:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 3296 states have (on average 1.3191747572815533) internal successors, (4348), 3423 states have internal predecessors, (4348), 1391 states have call successors, (1391), 576 states have call predecessors, (1391), 573 states have return successors, (1390), 1346 states have call predecessors, (1390), 1390 states have call successors, (1390) [2023-11-23 21:28:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 7129 transitions. [2023-11-23 21:28:11,968 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 7129 transitions. Word has length 436 [2023-11-23 21:28:11,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:11,969 INFO L495 AbstractCegarLoop]: Abstraction has 5261 states and 7129 transitions. [2023-11-23 21:28:11,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 3 states have call successors, (48), 3 states have call predecessors, (48), 1 states have return successors, (45), 2 states have call predecessors, (45), 2 states have call successors, (45) [2023-11-23 21:28:11,987 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 7129 transitions. [2023-11-23 21:28:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2023-11-23 21:28:12,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:12,007 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:12,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:28:12,007 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:28:12,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:12,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1335360790, now seen corresponding path program 1 times [2023-11-23 21:28:12,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:12,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765665615] [2023-11-23 21:28:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:12,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2801 trivial. 0 not checked. [2023-11-23 21:28:12,910 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:12,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765665615] [2023-11-23 21:28:12,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765665615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:12,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:12,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:12,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167981485] [2023-11-23 21:28:12,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:12,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:12,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:12,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:12,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:12,915 INFO L87 Difference]: Start difference. First operand 5261 states and 7129 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 3 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (53), 3 states have call predecessors, (53), 3 states have call successors, (53) [2023-11-23 21:28:14,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []