./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/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_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh --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 0.2.4-dev-0e0057c [2023-12-02 12:59:39,101 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:59:39,168 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 12:59:39,172 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:59:39,172 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:59:39,196 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:59:39,197 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:59:39,197 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:59:39,198 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:59:39,199 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:59:39,199 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:59:39,200 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:59:39,200 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:59:39,201 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:59:39,201 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:59:39,202 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:59:39,202 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:59:39,203 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:59:39,203 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:59:39,204 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:59:39,204 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:59:39,205 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:59:39,206 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:59:39,206 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:59:39,207 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:59:39,207 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:59:39,207 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:59:39,208 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:59:39,208 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:59:39,208 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:59:39,209 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:59:39,209 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:59:39,210 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:59:39,210 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:59:39,210 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:59:39,210 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:59:39,210 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:59:39,211 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:59:39,211 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:59:39,211 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:59:39,211 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:59:39,212 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:59:39,212 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:59:39,212 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:59:39,212 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_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c92cf9b42919bd0ad39ed67eff3f7cfedcded9ddd3bd80f0a39950ee91c5e90b [2023-12-02 12:59:39,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:59:39,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:59:39,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:59:39,457 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:59:39,457 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:59:39,458 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/../../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 [2023-12-02 12:59:42,245 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:59:42,717 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:59:42,717 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/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 [2023-12-02 12:59:42,757 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/data/3934bd917/8aafbf53bf40441b9d896f058e3379a8/FLAG257bd7c03 [2023-12-02 12:59:42,770 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/data/3934bd917/8aafbf53bf40441b9d896f058e3379a8 [2023-12-02 12:59:42,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:59:42,774 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:59:42,776 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:59:42,776 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:59:42,781 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:59:42,781 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:59:42" (1/1) ... [2023-12-02 12:59:42,783 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@109151f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:59:42, skipping insertion in model container [2023-12-02 12:59:42,783 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:59:42" (1/1) ... [2023-12-02 12:59:42,913 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:59:43,582 WARN L638 FunctionHandler]: implicit declaration of function ldv_undef_int [2023-12-02 12:59:43,583 WARN L638 FunctionHandler]: implicit declaration of function ldv_assume [2023-12-02 12:59:45,158 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_048770d4-85de-431e-ba5c-4ac349a814dc/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] [2023-12-02 12:59:45,218 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:59:45,252 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:59:45,402 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] [2023-12-02 12:59:45,404 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] [2023-12-02 12:59:45,405 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] [2023-12-02 12:59:45,408 WARN L638 FunctionHandler]: implicit declaration of function ldv_undef_int [2023-12-02 12:59:45,408 WARN L638 FunctionHandler]: implicit declaration of function ldv_assume [2023-12-02 12:59:45,414 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] [2023-12-02 12:59:45,421 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] [2023-12-02 12:59:45,445 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] [2023-12-02 12:59:45,445 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("": : : "memory"); [7080] [2023-12-02 12:59:45,487 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] [2023-12-02 12:59:45,488 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] [2023-12-02 12:59:45,490 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("sfence": : : "memory"); [7607] [2023-12-02 12:59:45,491 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("sfence": : : "memory"); [7610] [2023-12-02 12:59:45,491 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("mfence": : : "memory"); [7612] [2023-12-02 12:59:45,505 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] [2023-12-02 12:59:45,505 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("lfence": : : "memory"); [7691] [2023-12-02 12:59:45,507 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] [2023-12-02 12:59:45,508 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("mfence": : : "memory"); [7729] [2023-12-02 12:59:45,511 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] [2023-12-02 12:59:45,516 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] [2023-12-02 12:59:45,523 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("sfence": : : "memory"); [8051] [2023-12-02 12:59:45,524 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("mfence": : : "memory"); [8053] [2023-12-02 12:59:45,527 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] [2023-12-02 12:59:45,536 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] [2023-12-02 12:59:45,542 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] [2023-12-02 12:59:45,542 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] [2023-12-02 12:59:45,545 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] [2023-12-02 12:59:45,560 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("lfence": : : "memory"); [8520] [2023-12-02 12:59:45,601 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("mfence": : : "memory"); [8602] [2023-12-02 12:59:45,603 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("": "=r" (__ptr): "0" (np->rx_stats)); [8656] [2023-12-02 12:59:45,604 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("": "=r" (__ptr___0): "0" (np->tx_stats)); [8659] [2023-12-02 12:59:45,619 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("": "=r" (__ptr): "0" (pcpu_stats)); [8981] [2023-12-02 12:59:45,620 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("": "=r" (__ptr___0): "0" (pcpu_stats___0)); [9005] [2023-12-02 12:59:45,699 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_048770d4-85de-431e-ba5c-4ac349a814dc/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] [2023-12-02 12:59:45,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:59:45,866 WARN L675 CHandler]: The function sprintf is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:59:45,867 WARN L675 CHandler]: The function ldv_assume is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 12:59:45,875 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:59:45,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:59:45 WrapperNode [2023-12-02 12:59:45,875 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:59:45,876 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:59:45,876 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:59:45,876 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:59:45,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:59:45" (1/1) ... [2023-12-02 12:59:45,954 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:59:45" (1/1) ... [2023-12-02 12:59:46,132 INFO L138 Inliner]: procedures = 337, calls = 1940, calls flagged for inlining = 167, calls inlined = 140, statements flattened = 4915 [2023-12-02 12:59:46,133 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:59:46,134 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:59:46,134 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:59:46,134 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:59:46,143 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:59:45" (1/1) ... [2023-12-02 12:59:46,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:59:45" (1/1) ... [2023-12-02 12:59:46,162 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:59:45" (1/1) ... [2023-12-02 12:59:46,162 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:59:45" (1/1) ... [2023-12-02 12:59:46,248 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:59:45" (1/1) ... [2023-12-02 12:59:46,283 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:59:45" (1/1) ... [2023-12-02 12:59:46,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:59:45" (1/1) ... [2023-12-02 12:59:46,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:59:45" (1/1) ... [2023-12-02 12:59:46,339 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:59:46,340 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:59:46,340 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:59:46,340 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:59:46,341 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:59:45" (1/1) ... [2023-12-02 12:59:46,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:59:46,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:59:46,369 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:59:46,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:59:46,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-12-02 12:59:46,399 INFO L130 BoogieDeclarations]: Found specification of procedure get_page [2023-12-02 12:59:46,399 INFO L138 BoogieDeclarations]: Found implementation of procedure get_page [2023-12-02 12:59:46,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 12:59:46,399 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 12:59:46,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 12:59:46,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-02 12:59:46,400 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-02 12:59:46,400 INFO L130 BoogieDeclarations]: Found specification of procedure napi_schedule [2023-12-02 12:59:46,400 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_schedule [2023-12-02 12:59:46,400 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_change_mtu [2023-12-02 12:59:46,400 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_change_mtu [2023-12-02 12:59:46,400 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2023-12-02 12:59:46,400 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2023-12-02 12:59:46,400 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_write [2023-12-02 12:59:46,401 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_write [2023-12-02 12:59:46,401 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2023-12-02 12:59:46,401 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2023-12-02 12:59:46,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-12-02 12:59:46,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-12-02 12:59:46,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 12:59:46,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 12:59:46,401 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2023-12-02 12:59:46,401 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2023-12-02 12:59:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_scanf [2023-12-02 12:59:46,402 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_scanf [2023-12-02 12:59:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_fetch_retry_irq [2023-12-02 12:59:46,402 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_fetch_retry_irq [2023-12-02 12:59:46,402 INFO L130 BoogieDeclarations]: Found specification of procedure bind_evtchn_to_irqhandler [2023-12-02 12:59:46,402 INFO L138 BoogieDeclarations]: Found implementation of procedure bind_evtchn_to_irqhandler [2023-12-02 12:59:46,403 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_transaction_end [2023-12-02 12:59:46,403 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_transaction_end [2023-12-02 12:59:46,403 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_remove [2023-12-02 12:59:46,403 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_remove [2023-12-02 12:59:46,403 INFO L130 BoogieDeclarations]: Found specification of procedure __alloc_percpu [2023-12-02 12:59:46,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __alloc_percpu [2023-12-02 12:59:46,403 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 12:59:46,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 12:59:46,404 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_make_txreqs [2023-12-02 12:59:46,404 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_make_txreqs [2023-12-02 12:59:46,404 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_destroy_queues [2023-12-02 12:59:46,404 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_destroy_queues [2023-12-02 12:59:46,404 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2023-12-02 12:59:46,404 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2023-12-02 12:59:46,405 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2023-12-02 12:59:46,405 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2023-12-02 12:59:46,405 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_grant_ring [2023-12-02 12:59:46,405 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_grant_ring [2023-12-02 12:59:46,405 INFO L130 BoogieDeclarations]: Found specification of procedure free_percpu [2023-12-02 12:59:46,405 INFO L138 BoogieDeclarations]: Found implementation of procedure free_percpu [2023-12-02 12:59:46,405 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2023-12-02 12:59:46,405 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2023-12-02 12:59:46,406 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_claim_grant_reference [2023-12-02 12:59:46,406 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_claim_grant_reference [2023-12-02 12:59:46,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-12-02 12:59:46,406 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-12-02 12:59:46,406 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 12:59:46,406 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 12:59:46,406 INFO L130 BoogieDeclarations]: Found specification of procedure netif_set_real_num_tx_queues [2023-12-02 12:59:46,406 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_set_real_num_tx_queues [2023-12-02 12:59:46,407 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_end_foreign_access [2023-12-02 12:59:46,407 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_end_foreign_access [2023-12-02 12:59:46,407 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_disconnect_backend [2023-12-02 12:59:46,407 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_disconnect_backend [2023-12-02 12:59:46,407 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_get_stats64 [2023-12-02 12:59:46,407 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_get_stats64 [2023-12-02 12:59:46,407 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-12-02 12:59:46,407 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-12-02 12:59:46,408 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_alloc_evtchn [2023-12-02 12:59:46,408 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_alloc_evtchn [2023-12-02 12:59:46,408 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2023-12-02 12:59:46,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2023-12-02 12:59:46,408 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_alloc_grant_references [2023-12-02 12:59:46,408 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_alloc_grant_references [2023-12-02 12:59:46,408 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2023-12-02 12:59:46,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2023-12-02 12:59:46,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 12:59:46,409 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_printf [2023-12-02 12:59:46,409 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_printf [2023-12-02 12:59:46,409 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf [2023-12-02 12:59:46,409 INFO L130 BoogieDeclarations]: Found specification of procedure netfront_tx_slot_available [2023-12-02 12:59:46,409 INFO L138 BoogieDeclarations]: Found implementation of procedure netfront_tx_slot_available [2023-12-02 12:59:46,409 INFO L130 BoogieDeclarations]: Found specification of procedure notify_remote_via_irq [2023-12-02 12:59:46,410 INFO L138 BoogieDeclarations]: Found implementation of procedure notify_remote_via_irq [2023-12-02 12:59:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_release_grant_reference [2023-12-02 12:59:46,410 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_release_grant_reference [2023-12-02 12:59:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2023-12-02 12:59:46,410 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2023-12-02 12:59:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2023-12-02 12:59:46,410 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2023-12-02 12:59:46,410 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_can_sg [2023-12-02 12:59:46,411 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_can_sg [2023-12-02 12:59:46,411 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 12:59:46,411 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2023-12-02 12:59:46,411 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2023-12-02 12:59:46,411 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2023-12-02 12:59:46,411 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2023-12-02 12:59:46,411 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-12-02 12:59:46,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-12-02 12:59:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_rxidx [2023-12-02 12:59:46,412 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_rxidx [2023-12-02 12:59:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-12-02 12:59:46,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-12-02 12:59:46,412 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-12-02 12:59:46,412 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-12-02 12:59:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure __pskb_pull_tail [2023-12-02 12:59:46,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __pskb_pull_tail [2023-12-02 12:59:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:59:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2023-12-02 12:59:46,413 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2023-12-02 12:59:46,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 12:59:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure write_queue_xenstore_keys [2023-12-02 12:59:46,414 INFO L138 BoogieDeclarations]: Found implementation of procedure write_queue_xenstore_keys [2023-12-02 12:59:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-12-02 12:59:46,414 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-12-02 12:59:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure pfn_to_mfn [2023-12-02 12:59:46,414 INFO L138 BoogieDeclarations]: Found implementation of procedure pfn_to_mfn [2023-12-02 12:59:46,414 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2023-12-02 12:59:46,415 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2023-12-02 12:59:46,415 INFO L130 BoogieDeclarations]: Found specification of procedure add_id_to_freelist [2023-12-02 12:59:46,415 INFO L138 BoogieDeclarations]: Found implementation of procedure add_id_to_freelist [2023-12-02 12:59:46,415 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_alloc_rx_buffers [2023-12-02 12:59:46,415 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_alloc_rx_buffers [2023-12-02 12:59:46,415 INFO L130 BoogieDeclarations]: Found specification of procedure skb_entry_set_link [2023-12-02 12:59:46,416 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_entry_set_link [2023-12-02 12:59:46,416 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-12-02 12:59:46,416 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-12-02 12:59:46,416 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-12-02 12:59:46,416 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-12-02 12:59:46,416 INFO L130 BoogieDeclarations]: Found specification of procedure store_rxbuf [2023-12-02 12:59:46,416 INFO L138 BoogieDeclarations]: Found implementation of procedure store_rxbuf [2023-12-02 12:59:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2023-12-02 12:59:46,417 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2023-12-02 12:59:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure free_pages [2023-12-02 12:59:46,417 INFO L138 BoogieDeclarations]: Found implementation of procedure free_pages [2023-12-02 12:59:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_end_foreign_access_ref [2023-12-02 12:59:46,417 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_end_foreign_access_ref [2023-12-02 12:59:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-12-02 12:59:46,417 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_make_one_txreq [2023-12-02 12:59:46,417 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_make_one_txreq [2023-12-02 12:59:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2023-12-02 12:59:46,418 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2023-12-02 12:59:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_free_grant_references [2023-12-02 12:59:46,418 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_free_grant_references [2023-12-02 12:59:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure simple_strtoul [2023-12-02 12:59:46,418 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_strtoul [2023-12-02 12:59:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2023-12-02 12:59:46,418 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2023-12-02 12:59:46,418 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-12-02 12:59:46,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-12-02 12:59:46,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-12-02 12:59:46,419 INFO L130 BoogieDeclarations]: Found specification of procedure unbind_from_irqhandler [2023-12-02 12:59:46,419 INFO L138 BoogieDeclarations]: Found implementation of procedure unbind_from_irqhandler [2023-12-02 12:59:46,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_assume [2023-12-02 12:59:46,419 INFO L130 BoogieDeclarations]: Found specification of procedure get_zeroed_page [2023-12-02 12:59:46,419 INFO L138 BoogieDeclarations]: Found implementation of procedure get_zeroed_page [2023-12-02 12:59:46,419 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_free_netdev [2023-12-02 12:59:46,419 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_free_netdev [2023-12-02 12:59:46,420 INFO L130 BoogieDeclarations]: Found specification of procedure netback_changed [2023-12-02 12:59:46,420 INFO L138 BoogieDeclarations]: Found implementation of procedure netback_changed [2023-12-02 12:59:46,420 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_poll_controller [2023-12-02 12:59:46,420 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_poll_controller [2023-12-02 12:59:46,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 12:59:46,420 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_page [2023-12-02 12:59:46,420 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_page [2023-12-02 12:59:46,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-12-02 12:59:46,420 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-12-02 12:59:46,420 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_select_queue [2023-12-02 12:59:46,421 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_select_queue [2023-12-02 12:59:46,421 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_end_access [2023-12-02 12:59:46,421 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_end_access [2023-12-02 12:59:46,421 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-12-02 12:59:46,421 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-12-02 12:59:46,421 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-12-02 12:59:46,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-12-02 12:59:46,421 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2023-12-02 12:59:46,421 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2023-12-02 12:59:46,421 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_init [2023-12-02 12:59:46,421 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_init [2023-12-02 12:59:46,421 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-12-02 12:59:46,422 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-12-02 12:59:46,422 INFO L130 BoogieDeclarations]: Found specification of procedure skb_add_rx_frag [2023-12-02 12:59:46,422 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_add_rx_frag [2023-12-02 12:59:46,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 12:59:46,422 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-12-02 12:59:46,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-12-02 12:59:46,422 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2023-12-02 12:59:46,422 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2023-12-02 12:59:46,422 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2023-12-02 12:59:46,422 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2023-12-02 12:59:46,422 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-12-02 12:59:46,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-12-02 12:59:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-12-02 12:59:46,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-12-02 12:59:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_fix_features [2023-12-02 12:59:46,423 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_fix_features [2023-12-02 12:59:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 12:59:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-12-02 12:59:46,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-12-02 12:59:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure get_phys_to_machine [2023-12-02 12:59:46,423 INFO L138 BoogieDeclarations]: Found implementation of procedure get_phys_to_machine [2023-12-02 12:59:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 12:59:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2023-12-02 12:59:46,424 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2023-12-02 12:59:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure cpumask_next [2023-12-02 12:59:46,424 INFO L138 BoogieDeclarations]: Found implementation of procedure cpumask_next [2023-12-02 12:59:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-12-02 12:59:46,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-12-02 12:59:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 12:59:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headlen [2023-12-02 12:59:46,424 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headlen [2023-12-02 12:59:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2023-12-02 12:59:46,424 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2023-12-02 12:59:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure show_rxbuf [2023-12-02 12:59:46,425 INFO L138 BoogieDeclarations]: Found implementation of procedure show_rxbuf [2023-12-02 12:59:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure skb_is_gso [2023-12-02 12:59:46,425 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_is_gso [2023-12-02 12:59:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2023-12-02 12:59:46,425 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2023-12-02 12:59:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_grant_foreign_access_ref [2023-12-02 12:59:46,425 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_grant_foreign_access_ref [2023-12-02 12:59:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2023-12-02 12:59:46,425 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2023-12-02 12:59:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_set_features [2023-12-02 12:59:46,425 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_set_features [2023-12-02 12:59:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size [2023-12-02 12:59:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size [2023-12-02 12:59:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_fetch_begin_irq [2023-12-02 12:59:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_fetch_begin_irq [2023-12-02 12:59:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure dev_warn [2023-12-02 12:59:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_warn [2023-12-02 12:59:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 12:59:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_dev_fatal [2023-12-02 12:59:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_dev_fatal [2023-12-02 12:59:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_free_evtchn [2023-12-02 12:59:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_free_evtchn [2023-12-02 12:59:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:59:46,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:59:46,427 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_tx_buf_gc [2023-12-02 12:59:46,428 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_tx_buf_gc [2023-12-02 12:59:46,429 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2023-12-02 12:59:46,429 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2023-12-02 12:59:46,429 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-12-02 12:59:46,429 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-12-02 12:59:47,129 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:59:47,134 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:59:48,077 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 12:59:50,508 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:59:51,502 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:59:51,503 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-02 12:59:51,505 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:59:51 BoogieIcfgContainer [2023-12-02 12:59:51,505 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:59:51,507 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:59:51,507 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:59:51,509 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:59:51,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:59:42" (1/3) ... [2023-12-02 12:59:51,510 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65dba277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:59:51, skipping insertion in model container [2023-12-02 12:59:51,510 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:59:45" (2/3) ... [2023-12-02 12:59:51,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65dba277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:59:51, skipping insertion in model container [2023-12-02 12:59:51,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:59:51" (3/3) ... [2023-12-02 12:59:51,512 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2023-12-02 12:59:51,528 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:59:51,528 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 12:59:51,593 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:59:51,598 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;@2a55e466, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:59:51,599 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 12:59:51,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 1323 states, 819 states have (on average 1.3406593406593406) internal successors, (1098), 856 states have internal predecessors, (1098), 390 states have call successors, (390), 113 states have call predecessors, (390), 112 states have return successors, (381), 378 states have call predecessors, (381), 381 states have call successors, (381) [2023-12-02 12:59:51,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2023-12-02 12:59:51,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:59:51,650 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] [2023-12-02 12:59:51,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:59:51,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:59:51,656 INFO L85 PathProgramCache]: Analyzing trace with hash -859052471, now seen corresponding path program 1 times [2023-12-02 12:59:51,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:59:51,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957842424] [2023-12-02 12:59:51,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:59:51,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:59:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:59:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2023-12-02 12:59:52,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:59:52,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957842424] [2023-12-02 12:59:52,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957842424] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:59:52,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:59:52,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:59:52,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090033697] [2023-12-02 12:59:52,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:59:52,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:59:52,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:59:52,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:59:52,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:59:52,861 INFO L87 Difference]: Start difference. First operand has 1323 states, 819 states have (on average 1.3406593406593406) internal successors, (1098), 856 states have internal predecessors, (1098), 390 states have call successors, (390), 113 states have call predecessors, (390), 112 states have return successors, (381), 378 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) [2023-12-02 12:59:54,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:59:54,846 INFO L93 Difference]: Finished difference Result 3288 states and 4641 transitions. [2023-12-02 12:59:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:59:54,848 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 [2023-12-02 12:59:54,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:59:54,878 INFO L225 Difference]: With dead ends: 3288 [2023-12-02 12:59:54,878 INFO L226 Difference]: Without dead ends: 1980 [2023-12-02 12:59:54,889 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 [2023-12-02 12:59:54,892 INFO L413 NwaCegarLoop]: 1627 mSDtfsCounter, 1038 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 3158 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:59:54,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1038 Valid, 3158 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 12:59:54,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1980 states. [2023-12-02 12:59:55,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1980 to 1976. [2023-12-02 12:59:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1239 states have (on average 1.33091202582728) internal successors, (1649), 1275 states have internal predecessors, (1649), 554 states have call successors, (554), 183 states have call predecessors, (554), 182 states have return successors, (553), 546 states have call predecessors, (553), 553 states have call successors, (553) [2023-12-02 12:59:55,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 2756 transitions. [2023-12-02 12:59:55,095 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 2756 transitions. Word has length 343 [2023-12-02 12:59:55,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:59:55,097 INFO L495 AbstractCegarLoop]: Abstraction has 1976 states and 2756 transitions. [2023-12-02 12:59:55,097 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) [2023-12-02 12:59:55,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 2756 transitions. [2023-12-02 12:59:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2023-12-02 12:59:55,108 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:59:55,108 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] [2023-12-02 12:59:55,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:59:55,109 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:59:55,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:59:55,109 INFO L85 PathProgramCache]: Analyzing trace with hash -722198157, now seen corresponding path program 1 times [2023-12-02 12:59:55,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:59:55,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724083624] [2023-12-02 12:59:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:59:55,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:59:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:59:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1464 trivial. 0 not checked. [2023-12-02 12:59:55,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:59:55,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724083624] [2023-12-02 12:59:55,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724083624] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:59:55,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:59:55,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:59:55,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953326101] [2023-12-02 12:59:55,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:59:55,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:59:55,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:59:55,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:59:55,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:59:55,735 INFO L87 Difference]: Start difference. First operand 1976 states and 2756 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) [2023-12-02 12:59:58,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:59:58,399 INFO L93 Difference]: Finished difference Result 4936 states and 6870 transitions. [2023-12-02 12:59:58,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:59:58,400 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 [2023-12-02 12:59:58,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:59:58,424 INFO L225 Difference]: With dead ends: 4936 [2023-12-02 12:59:58,424 INFO L226 Difference]: Without dead ends: 3018 [2023-12-02 12:59:58,433 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 [2023-12-02 12:59:58,434 INFO L413 NwaCegarLoop]: 1763 mSDtfsCounter, 1337 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1337 SdHoareTripleChecker+Valid, 3184 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:59:58,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1337 Valid, 3184 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 12:59:58,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2023-12-02 12:59:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3006. [2023-12-02 12:59:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 1905 states have (on average 1.3385826771653544) internal successors, (2550), 1973 states have internal predecessors, (2550), 817 states have call successors, (817), 286 states have call predecessors, (817), 283 states have return successors, (816), 796 states have call predecessors, (816), 816 states have call successors, (816) [2023-12-02 12:59:58,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 4183 transitions. [2023-12-02 12:59:58,636 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 4183 transitions. Word has length 346 [2023-12-02 12:59:58,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:59:58,637 INFO L495 AbstractCegarLoop]: Abstraction has 3006 states and 4183 transitions. [2023-12-02 12:59:58,637 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) [2023-12-02 12:59:58,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 4183 transitions. [2023-12-02 12:59:58,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-12-02 12:59:58,650 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:59:58,651 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] [2023-12-02 12:59:58,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:59:58,651 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 12:59:58,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:59:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1899275908, now seen corresponding path program 1 times [2023-12-02 12:59:58,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:59:58,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858670213] [2023-12-02 12:59:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:59:58,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:59:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:59:59,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2573 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2568 trivial. 0 not checked. [2023-12-02 12:59:59,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:59:59,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858670213] [2023-12-02 12:59:59,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858670213] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:59:59,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:59:59,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:59:59,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893567769] [2023-12-02 12:59:59,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:59:59,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:59:59,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:59:59,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:59:59,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:59:59,500 INFO L87 Difference]: Start difference. First operand 3006 states and 4183 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2023-12-02 13:00:03,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:03,366 INFO L93 Difference]: Finished difference Result 5966 states and 8299 transitions. [2023-12-02 13:00:03,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:00:03,367 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 432 [2023-12-02 13:00:03,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:03,383 INFO L225 Difference]: With dead ends: 5966 [2023-12-02 13:00:03,383 INFO L226 Difference]: Without dead ends: 3006 [2023-12-02 13:00:03,392 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 [2023-12-02 13:00:03,394 INFO L413 NwaCegarLoop]: 1590 mSDtfsCounter, 3 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 4766 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:03,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 4766 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-12-02 13:00:03,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3006 states. [2023-12-02 13:00:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3006 to 3006. [2023-12-02 13:00:03,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 1905 states have (on average 1.3343832020997375) internal successors, (2542), 1973 states have internal predecessors, (2542), 817 states have call successors, (817), 286 states have call predecessors, (817), 283 states have return successors, (816), 796 states have call predecessors, (816), 816 states have call successors, (816) [2023-12-02 13:00:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 4175 transitions. [2023-12-02 13:00:03,508 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 4175 transitions. Word has length 432 [2023-12-02 13:00:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:03,509 INFO L495 AbstractCegarLoop]: Abstraction has 3006 states and 4175 transitions. [2023-12-02 13:00:03,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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) [2023-12-02 13:00:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 4175 transitions. [2023-12-02 13:00:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-12-02 13:00:03,515 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:03,516 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] [2023-12-02 13:00:03,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:00:03,516 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:00:03,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:03,517 INFO L85 PathProgramCache]: Analyzing trace with hash -540282317, now seen corresponding path program 1 times [2023-12-02 13:00:03,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:03,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518953741] [2023-12-02 13:00:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:03,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:03,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2573 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2573 trivial. 0 not checked. [2023-12-02 13:00:05,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:05,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518953741] [2023-12-02 13:00:05,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518953741] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:00:05,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:00:05,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 13:00:05,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349974653] [2023-12-02 13:00:05,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:00:05,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 13:00:05,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:00:05,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 13:00:05,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 13:00:05,273 INFO L87 Difference]: Start difference. First operand 3006 states and 4175 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) [2023-12-02 13:00:06,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:00:08,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:08,848 INFO L93 Difference]: Finished difference Result 3197 states and 4349 transitions. [2023-12-02 13:00:08,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 13:00:08,849 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 [2023-12-02 13:00:08,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:08,873 INFO L225 Difference]: With dead ends: 3197 [2023-12-02 13:00:08,874 INFO L226 Difference]: Without dead ends: 3194 [2023-12-02 13:00:08,876 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 [2023-12-02 13:00:08,877 INFO L413 NwaCegarLoop]: 1615 mSDtfsCounter, 1346 mSDsluCounter, 1969 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1346 SdHoareTripleChecker+Valid, 3584 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:08,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1346 Valid, 3584 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-12-02 13:00:08,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2023-12-02 13:00:09,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3194. [2023-12-02 13:00:09,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 2004 states have (on average 1.3213572854291418) internal successors, (2648), 2074 states have internal predecessors, (2648), 849 states have call successors, (849), 343 states have call predecessors, (849), 340 states have return successors, (848), 828 states have call predecessors, (848), 848 states have call successors, (848) [2023-12-02 13:00:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 4345 transitions. [2023-12-02 13:00:09,044 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 4345 transitions. Word has length 436 [2023-12-02 13:00:09,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:09,046 INFO L495 AbstractCegarLoop]: Abstraction has 3194 states and 4345 transitions. [2023-12-02 13:00:09,046 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) [2023-12-02 13:00:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 4345 transitions. [2023-12-02 13:00:09,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2023-12-02 13:00:09,061 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:09,062 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] [2023-12-02 13:00:09,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 13:00:09,062 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:00:09,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:09,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1550174665, now seen corresponding path program 1 times [2023-12-02 13:00:09,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:09,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144479195] [2023-12-02 13:00:09,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:09,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2801 trivial. 0 not checked. [2023-12-02 13:00:09,842 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:09,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144479195] [2023-12-02 13:00:09,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144479195] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:00:09,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:00:09,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:00:09,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622537713] [2023-12-02 13:00:09,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:00:09,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:00:09,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:00:09,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:00:09,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:00:09,845 INFO L87 Difference]: Start difference. First operand 3194 states and 4345 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) [2023-12-02 13:00:12,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:12,675 INFO L93 Difference]: Finished difference Result 7755 states and 10549 transitions. [2023-12-02 13:00:12,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:00:12,676 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 490 [2023-12-02 13:00:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:12,699 INFO L225 Difference]: With dead ends: 7755 [2023-12-02 13:00:12,699 INFO L226 Difference]: Without dead ends: 4619 [2023-12-02 13:00:12,708 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 [2023-12-02 13:00:12,709 INFO L413 NwaCegarLoop]: 2575 mSDtfsCounter, 1386 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 4068 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:12,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1386 Valid, 4068 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 711 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 13:00:12,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4619 states. [2023-12-02 13:00:12,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4619 to 4603. [2023-12-02 13:00:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4603 states, 2920 states have (on average 1.3184931506849316) internal successors, (3850), 3026 states have internal predecessors, (3850), 1184 states have call successors, (1184), 503 states have call predecessors, (1184), 498 states have return successors, (1183), 1150 states have call predecessors, (1183), 1183 states have call successors, (1183) [2023-12-02 13:00:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4603 states to 4603 states and 6217 transitions. [2023-12-02 13:00:12,881 INFO L78 Accepts]: Start accepts. Automaton has 4603 states and 6217 transitions. Word has length 490 [2023-12-02 13:00:12,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:12,882 INFO L495 AbstractCegarLoop]: Abstraction has 4603 states and 6217 transitions. [2023-12-02 13:00:12,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-12-02 13:00:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4603 states and 6217 transitions. [2023-12-02 13:00:12,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2023-12-02 13:00:12,896 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:12,896 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:00:12,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 13:00:12,897 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:00:12,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:12,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1970997057, now seen corresponding path program 1 times [2023-12-02 13:00:12,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:12,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920545883] [2023-12-02 13:00:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:12,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2829 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2813 trivial. 0 not checked. [2023-12-02 13:00:17,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:17,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920545883] [2023-12-02 13:00:17,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920545883] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:00:17,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:00:17,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-12-02 13:00:17,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395970966] [2023-12-02 13:00:17,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:00:17,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 13:00:17,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:00:17,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 13:00:17,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-12-02 13:00:17,217 INFO L87 Difference]: Start difference. First operand 4603 states and 6217 transitions. Second operand has 12 states, 7 states have (on average 18.428571428571427) internal successors, (129), 9 states have internal predecessors, (129), 4 states have call successors, (56), 2 states have call predecessors, (56), 4 states have return successors, (53), 5 states have call predecessors, (53), 4 states have call successors, (53) [2023-12-02 13:00:20,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:00:23,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:00:30,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:30,734 INFO L93 Difference]: Finished difference Result 10369 states and 14325 transitions. [2023-12-02 13:00:30,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:00:30,735 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 18.428571428571427) internal successors, (129), 9 states have internal predecessors, (129), 4 states have call successors, (56), 2 states have call predecessors, (56), 4 states have return successors, (53), 5 states have call predecessors, (53), 4 states have call successors, (53) Word has length 507 [2023-12-02 13:00:30,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:30,766 INFO L225 Difference]: With dead ends: 10369 [2023-12-02 13:00:30,766 INFO L226 Difference]: Without dead ends: 5824 [2023-12-02 13:00:30,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-12-02 13:00:30,781 INFO L413 NwaCegarLoop]: 1986 mSDtfsCounter, 384 mSDsluCounter, 19496 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 21482 SdHoareTripleChecker+Invalid, 3025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:30,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 21482 Invalid, 3025 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8 Valid, 3017 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2023-12-02 13:00:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5824 states. [2023-12-02 13:00:30,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5824 to 4615. [2023-12-02 13:00:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4615 states, 2929 states have (on average 1.3175145100716967) internal successors, (3859), 3035 states have internal predecessors, (3859), 1187 states have call successors, (1187), 503 states have call predecessors, (1187), 498 states have return successors, (1186), 1153 states have call predecessors, (1186), 1186 states have call successors, (1186) [2023-12-02 13:00:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4615 states to 4615 states and 6232 transitions. [2023-12-02 13:00:30,972 INFO L78 Accepts]: Start accepts. Automaton has 4615 states and 6232 transitions. Word has length 507 [2023-12-02 13:00:30,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:30,973 INFO L495 AbstractCegarLoop]: Abstraction has 4615 states and 6232 transitions. [2023-12-02 13:00:30,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 18.428571428571427) internal successors, (129), 9 states have internal predecessors, (129), 4 states have call successors, (56), 2 states have call predecessors, (56), 4 states have return successors, (53), 5 states have call predecessors, (53), 4 states have call successors, (53) [2023-12-02 13:00:30,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4615 states and 6232 transitions. [2023-12-02 13:00:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2023-12-02 13:00:30,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:30,986 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 9, 9, 9, 9, 9, 9, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:00:30,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 13:00:30,986 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:00:30,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:30,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1198908963, now seen corresponding path program 1 times [2023-12-02 13:00:30,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:30,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633267510] [2023-12-02 13:00:30,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:30,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2597 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2023-12-02 13:00:31,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:31,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633267510] [2023-12-02 13:00:31,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633267510] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:00:31,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:00:31,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 13:00:31,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403589802] [2023-12-02 13:00:31,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:00:31,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:00:31,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:00:31,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:00:31,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:00:31,504 INFO L87 Difference]: Start difference. First operand 4615 states and 6232 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 3 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2023-12-02 13:00:34,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:34,358 INFO L93 Difference]: Finished difference Result 12255 states and 16520 transitions. [2023-12-02 13:00:34,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:00:34,358 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 3 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) Word has length 524 [2023-12-02 13:00:34,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:34,400 INFO L225 Difference]: With dead ends: 12255 [2023-12-02 13:00:34,400 INFO L226 Difference]: Without dead ends: 7698 [2023-12-02 13:00:34,413 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 [2023-12-02 13:00:34,414 INFO L413 NwaCegarLoop]: 2386 mSDtfsCounter, 1670 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 3867 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:34,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1670 Valid, 3867 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 13:00:34,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7698 states. [2023-12-02 13:00:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7698 to 7692. [2023-12-02 13:00:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7692 states, 4877 states have (on average 1.3133073610826327) internal successors, (6405), 5056 states have internal predecessors, (6405), 1969 states have call successors, (1969), 850 states have call predecessors, (1969), 845 states have return successors, (1968), 1923 states have call predecessors, (1968), 1968 states have call successors, (1968) [2023-12-02 13:00:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7692 states to 7692 states and 10342 transitions. [2023-12-02 13:00:34,719 INFO L78 Accepts]: Start accepts. Automaton has 7692 states and 10342 transitions. Word has length 524 [2023-12-02 13:00:34,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:34,720 INFO L495 AbstractCegarLoop]: Abstraction has 7692 states and 10342 transitions. [2023-12-02 13:00:34,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 3 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2023-12-02 13:00:34,720 INFO L276 IsEmpty]: Start isEmpty. Operand 7692 states and 10342 transitions. [2023-12-02 13:00:34,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2023-12-02 13:00:34,735 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:34,736 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 9, 9, 9, 9, 9, 9, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:00:34,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 13:00:34,736 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:00:34,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:34,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1441267999, now seen corresponding path program 1 times [2023-12-02 13:00:34,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:34,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443514247] [2023-12-02 13:00:34,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:34,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2597 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2597 trivial. 0 not checked. [2023-12-02 13:00:35,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:35,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443514247] [2023-12-02 13:00:35,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443514247] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:00:35,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:00:35,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:00:35,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671862519] [2023-12-02 13:00:35,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:00:35,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 13:00:35,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:00:35,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 13:00:35,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 13:00:35,741 INFO L87 Difference]: Start difference. First operand 7692 states and 10342 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 3 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2023-12-02 13:00:38,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:00:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:00:41,965 INFO L93 Difference]: Finished difference Result 15368 states and 20661 transitions. [2023-12-02 13:00:41,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:00:41,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 3 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) Word has length 522 [2023-12-02 13:00:41,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:00:41,991 INFO L225 Difference]: With dead ends: 15368 [2023-12-02 13:00:41,991 INFO L226 Difference]: Without dead ends: 7734 [2023-12-02 13:00:42,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:00:42,009 INFO L413 NwaCegarLoop]: 1588 mSDtfsCounter, 18 mSDsluCounter, 4698 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6286 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-12-02 13:00:42,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 6286 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-12-02 13:00:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7734 states. [2023-12-02 13:00:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7734 to 7704. [2023-12-02 13:00:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7704 states, 4889 states have (on average 1.3125383514011044) internal successors, (6417), 5068 states have internal predecessors, (6417), 1969 states have call successors, (1969), 850 states have call predecessors, (1969), 845 states have return successors, (1968), 1923 states have call predecessors, (1968), 1968 states have call successors, (1968) [2023-12-02 13:00:42,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7704 states to 7704 states and 10354 transitions. [2023-12-02 13:00:42,264 INFO L78 Accepts]: Start accepts. Automaton has 7704 states and 10354 transitions. Word has length 522 [2023-12-02 13:00:42,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:00:42,265 INFO L495 AbstractCegarLoop]: Abstraction has 7704 states and 10354 transitions. [2023-12-02 13:00:42,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 3 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2023-12-02 13:00:42,265 INFO L276 IsEmpty]: Start isEmpty. Operand 7704 states and 10354 transitions. [2023-12-02 13:00:42,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2023-12-02 13:00:42,284 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:00:42,284 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:00:42,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 13:00:42,285 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:00:42,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:00:42,285 INFO L85 PathProgramCache]: Analyzing trace with hash 436216685, now seen corresponding path program 1 times [2023-12-02 13:00:42,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:00:42,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962775122] [2023-12-02 13:00:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:42,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:00:42,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:43,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2849 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 2829 trivial. 0 not checked. [2023-12-02 13:00:43,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:00:43,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962775122] [2023-12-02 13:00:43,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962775122] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:00:43,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642207916] [2023-12-02 13:00:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:00:43,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:00:43,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:00:43,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:00:43,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:00:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:00:45,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 4866 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 13:00:45,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:00:45,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-12-02 13:00:45,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-02 13:00:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2849 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 2675 trivial. 0 not checked. [2023-12-02 13:00:45,753 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:00:45,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642207916] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:00:45,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:00:45,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5] total 14 [2023-12-02 13:00:45,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936461062] [2023-12-02 13:00:45,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:00:45,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:00:45,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:00:45,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:00:45,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-12-02 13:00:45,757 INFO L87 Difference]: Start difference. First operand 7704 states and 10354 transitions. Second operand has 11 states, 9 states have (on average 16.11111111111111) internal successors, (145), 9 states have internal predecessors, (145), 4 states have call successors, (61), 3 states have call predecessors, (61), 5 states have return successors, (59), 6 states have call predecessors, (59), 4 states have call successors, (59) [2023-12-02 13:00:47,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:00:50,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:00:52,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:00:53,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 13:01:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:04,998 INFO L93 Difference]: Finished difference Result 22777 states and 30804 transitions. [2023-12-02 13:01:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 13:01:04,999 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.11111111111111) internal successors, (145), 9 states have internal predecessors, (145), 4 states have call successors, (61), 3 states have call predecessors, (61), 5 states have return successors, (59), 6 states have call predecessors, (59), 4 states have call successors, (59) Word has length 537 [2023-12-02 13:01:05,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:05,039 INFO L225 Difference]: With dead ends: 22777 [2023-12-02 13:01:05,039 INFO L226 Difference]: Without dead ends: 15131 [2023-12-02 13:01:05,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 527 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-12-02 13:01:05,059 INFO L413 NwaCegarLoop]: 2294 mSDtfsCounter, 2006 mSDsluCounter, 9047 mSDsCounter, 0 mSdLazyCounter, 7193 mSolverCounterSat, 228 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2006 SdHoareTripleChecker+Valid, 11341 SdHoareTripleChecker+Invalid, 7422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 7193 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:05,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2006 Valid, 11341 Invalid, 7422 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [228 Valid, 7193 Invalid, 1 Unknown, 0 Unchecked, 18.4s Time] [2023-12-02 13:01:05,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15131 states. [2023-12-02 13:01:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15131 to 14303. [2023-12-02 13:01:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14303 states, 9445 states have (on average 1.3519322392800424) internal successors, (12769), 9821 states have internal predecessors, (12769), 3328 states have call successors, (3328), 1553 states have call predecessors, (3328), 1529 states have return successors, (3415), 3120 states have call predecessors, (3415), 3327 states have call successors, (3415) [2023-12-02 13:01:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14303 states to 14303 states and 19512 transitions. [2023-12-02 13:01:05,760 INFO L78 Accepts]: Start accepts. Automaton has 14303 states and 19512 transitions. Word has length 537 [2023-12-02 13:01:05,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:05,762 INFO L495 AbstractCegarLoop]: Abstraction has 14303 states and 19512 transitions. [2023-12-02 13:01:05,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.11111111111111) internal successors, (145), 9 states have internal predecessors, (145), 4 states have call successors, (61), 3 states have call predecessors, (61), 5 states have return successors, (59), 6 states have call predecessors, (59), 4 states have call successors, (59) [2023-12-02 13:01:05,762 INFO L276 IsEmpty]: Start isEmpty. Operand 14303 states and 19512 transitions. [2023-12-02 13:01:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-12-02 13:01:05,803 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:05,803 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:05,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:01:06,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:06,018 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:01:06,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:06,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1083733096, now seen corresponding path program 1 times [2023-12-02 13:01:06,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:06,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847794285] [2023-12-02 13:01:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:06,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:07,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 2849 trivial. 0 not checked. [2023-12-02 13:01:07,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:07,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847794285] [2023-12-02 13:01:07,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847794285] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:01:07,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880700964] [2023-12-02 13:01:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:07,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:07,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:07,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:07,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:01:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:08,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 4987 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 13:01:08,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 1177 proven. 0 refuted. 0 times theorem prover too weak. 1696 trivial. 0 not checked. [2023-12-02 13:01:09,016 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:01:09,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880700964] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:01:09,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:01:09,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2023-12-02 13:01:09,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753291789] [2023-12-02 13:01:09,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:01:09,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:01:09,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:09,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:01:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:01:09,019 INFO L87 Difference]: Start difference. First operand 14303 states and 19512 transitions. Second operand has 6 states, 4 states have (on average 39.25) internal successors, (157), 6 states have internal predecessors, (157), 3 states have call successors, (65), 2 states have call predecessors, (65), 4 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2023-12-02 13:01:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:13,557 INFO L93 Difference]: Finished difference Result 28569 states and 38990 transitions. [2023-12-02 13:01:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:01:13,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 39.25) internal successors, (157), 6 states have internal predecessors, (157), 3 states have call successors, (65), 2 states have call predecessors, (65), 4 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) Word has length 554 [2023-12-02 13:01:13,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:13,591 INFO L225 Difference]: With dead ends: 28569 [2023-12-02 13:01:13,591 INFO L226 Difference]: Without dead ends: 14290 [2023-12-02 13:01:13,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:01:13,611 INFO L413 NwaCegarLoop]: 1579 mSDtfsCounter, 3 mSDsluCounter, 6292 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 7871 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:13,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 7871 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-12-02 13:01:13,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14290 states. [2023-12-02 13:01:14,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14290 to 14286. [2023-12-02 13:01:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14286 states, 9439 states have (on average 1.3520500052971713) internal successors, (12762), 9816 states have internal predecessors, (12762), 3319 states have call successors, (3319), 1551 states have call predecessors, (3319), 1527 states have return successors, (3396), 3110 states have call predecessors, (3396), 3318 states have call successors, (3396) [2023-12-02 13:01:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14286 states to 14286 states and 19477 transitions. [2023-12-02 13:01:14,105 INFO L78 Accepts]: Start accepts. Automaton has 14286 states and 19477 transitions. Word has length 554 [2023-12-02 13:01:14,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:14,106 INFO L495 AbstractCegarLoop]: Abstraction has 14286 states and 19477 transitions. [2023-12-02 13:01:14,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 39.25) internal successors, (157), 6 states have internal predecessors, (157), 3 states have call successors, (65), 2 states have call predecessors, (65), 4 states have return successors, (62), 3 states have call predecessors, (62), 3 states have call successors, (62) [2023-12-02 13:01:14,106 INFO L276 IsEmpty]: Start isEmpty. Operand 14286 states and 19477 transitions. [2023-12-02 13:01:14,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2023-12-02 13:01:14,133 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:14,133 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:14,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:01:14,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 13:01:14,335 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:01:14,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:14,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1794960596, now seen corresponding path program 2 times [2023-12-02 13:01:14,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:14,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772930950] [2023-12-02 13:01:14,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:14,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2981 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 2957 trivial. 0 not checked. [2023-12-02 13:01:15,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:15,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772930950] [2023-12-02 13:01:15,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772930950] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:01:15,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485006183] [2023-12-02 13:01:15,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 13:01:15,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:15,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:15,967 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:15,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:01:18,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 13:01:18,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 13:01:18,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 2563 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 13:01:18,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:18,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2981 backedges. 252 proven. 0 refuted. 0 times theorem prover too weak. 2729 trivial. 0 not checked. [2023-12-02 13:01:18,193 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:01:18,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485006183] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:01:18,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:01:18,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5] total 10 [2023-12-02 13:01:18,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762616272] [2023-12-02 13:01:18,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:01:18,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:01:18,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:01:18,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:01:18,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:01:18,196 INFO L87 Difference]: Start difference. First operand 14286 states and 19477 transitions. Second operand has 8 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (62), 4 states have call predecessors, (62), 2 states have call successors, (62) [2023-12-02 13:01:27,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:01:27,008 INFO L93 Difference]: Finished difference Result 28591 states and 38987 transitions. [2023-12-02 13:01:27,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:01:27,009 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (62), 4 states have call predecessors, (62), 2 states have call successors, (62) Word has length 562 [2023-12-02 13:01:27,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:01:27,051 INFO L225 Difference]: With dead ends: 28591 [2023-12-02 13:01:27,052 INFO L226 Difference]: Without dead ends: 14364 [2023-12-02 13:01:27,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:01:27,078 INFO L413 NwaCegarLoop]: 1592 mSDtfsCounter, 3 mSDsluCounter, 9538 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 11130 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:01:27,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 11130 Invalid, 1691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1690 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2023-12-02 13:01:27,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14364 states. [2023-12-02 13:01:27,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14364 to 14310. [2023-12-02 13:01:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14310 states, 9457 states have (on average 1.3513799302104261) internal successors, (12780), 9834 states have internal predecessors, (12780), 3319 states have call successors, (3319), 1551 states have call predecessors, (3319), 1533 states have return successors, (3415), 3116 states have call predecessors, (3415), 3318 states have call successors, (3415) [2023-12-02 13:01:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14310 states to 14310 states and 19514 transitions. [2023-12-02 13:01:27,716 INFO L78 Accepts]: Start accepts. Automaton has 14310 states and 19514 transitions. Word has length 562 [2023-12-02 13:01:27,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:01:27,717 INFO L495 AbstractCegarLoop]: Abstraction has 14310 states and 19514 transitions. [2023-12-02 13:01:27,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 22.857142857142858) internal successors, (160), 6 states have internal predecessors, (160), 2 states have call successors, (64), 2 states have call predecessors, (64), 4 states have return successors, (62), 4 states have call predecessors, (62), 2 states have call successors, (62) [2023-12-02 13:01:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 14310 states and 19514 transitions. [2023-12-02 13:01:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2023-12-02 13:01:27,741 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:01:27,741 INFO L195 NwaCegarLoop]: trace histogram [25, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 9, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:01:27,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:01:27,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:27,942 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 13:01:27,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:01:27,942 INFO L85 PathProgramCache]: Analyzing trace with hash -470754468, now seen corresponding path program 1 times [2023-12-02 13:01:27,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:01:27,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793649591] [2023-12-02 13:01:27,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:27,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:01:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 3057 trivial. 0 not checked. [2023-12-02 13:01:29,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:01:29,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793649591] [2023-12-02 13:01:29,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793649591] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:01:29,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901264284] [2023-12-02 13:01:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:01:29,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:01:29,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:01:29,548 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:01:29,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_048770d4-85de-431e-ba5c-4ac349a814dc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:01:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:01:31,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 5170 conjuncts, 192 conjunts are in the unsatisfiable core [2023-12-02 13:01:31,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:01:31,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 13:01:31,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 13:01:31,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2023-12-02 13:01:31,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2023-12-02 13:01:31,451 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 13:01:31,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 13:01:31,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 13:01:31,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2023-12-02 13:01:31,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 3 [2023-12-02 13:01:31,535 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-02 13:01:31,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-02 13:01:31,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 13:01:31,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-12-02 13:01:31,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 13:01:31,802 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 13:01:31,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-02 13:01:32,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-12-02 13:01:32,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-12-02 13:01:32,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-12-02 13:01:32,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-12-02 13:01:32,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 9 [2023-12-02 13:01:33,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-12-02 13:01:33,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-12-02 13:01:33,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-12-02 13:01:33,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-12-02 13:01:33,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-12-02 13:01:33,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-12-02 13:01:33,830 INFO L349 Elim1Store]: treesize reduction 16, result has 23.8 percent of original size [2023-12-02 13:01:33,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 16 [2023-12-02 13:01:34,796 INFO L349 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2023-12-02 13:01:34,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 81 treesize of output 98 [2023-12-02 13:01:34,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2023-12-02 13:01:34,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 13:01:36,085 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 13:01:36,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 16 [2023-12-02 13:01:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 987 proven. 135 refuted. 0 times theorem prover too weak. 1959 trivial. 0 not checked. [2023-12-02 13:01:36,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:02:20,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901264284] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:02:20,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [659539030] [2023-12-02 13:02:20,809 INFO L159 IcfgInterpreter]: Started Sifa with 230 locations of interest [2023-12-02 13:02:20,809 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:02:20,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:02:20,817 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:02:20,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs