./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:12:04,176 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:12:04,322 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-19 05:12:04,333 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:12:04,334 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:12:04,387 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:12:04,388 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:12:04,389 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:12:04,390 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:12:04,399 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:12:04,399 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:12:04,401 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:12:04,402 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:12:04,404 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:12:04,405 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:12:04,405 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:12:04,406 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:12:04,406 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:12:04,407 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:12:04,408 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:12:04,408 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:12:04,409 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:12:04,410 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:12:04,411 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 05:12:04,412 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:12:04,412 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:12:04,413 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 05:12:04,413 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:12:04,414 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 05:12:04,414 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 05:12:04,416 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:12:04,416 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:12:04,417 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:12:04,417 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:12:04,417 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:12:04,418 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:12:04,418 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 05:12:04,418 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:12:04,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:12:04,419 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 05:12:04,419 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:12:04,420 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:12:04,420 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_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 [2023-11-19 05:12:04,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:12:04,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:12:04,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:12:04,783 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:12:04,784 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:12:04,786 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2023-11-19 05:12:08,098 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:12:08,749 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:12:08,750 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58edc365-9290-415a-9fb6-4989135a3047/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2023-11-19 05:12:08,842 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ/data/6d91315d3/456b64cc63f64171ba3956e3ed219b34/FLAGb59aaf3c9 [2023-11-19 05:12:08,861 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ/data/6d91315d3/456b64cc63f64171ba3956e3ed219b34 [2023-11-19 05:12:08,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:12:08,870 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:12:08,871 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:12:08,871 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:12:08,878 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:12:08,880 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:12:08" (1/1) ... [2023-11-19 05:12:08,882 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18c49ec8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:08, skipping insertion in model container [2023-11-19 05:12:08,882 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:12:08" (1/1) ... [2023-11-19 05:12:09,038 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:12:10,930 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_58edc365-9290-415a-9fb6-4989135a3047/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2023-11-19 05:12:11,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:12:11,110 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:12:11,389 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"); [6103] [2023-11-19 05:12:11,392 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,%1\n\tsbb %0,%0": "=r" (oldbit), "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [6111-6112] [2023-11-19 05:12:11,392 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bswapl %0": "=r" (val): "0" (val)); [6119] [2023-11-19 05:12:11,396 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 *)"/work/ldvuser/exper_fp/inst/current/envs/linux-3.10-rc1.tar/linux-3.10-rc1/arch/x86/include/asm/paravirt.h"), "i" (824), "i" (12UL)); [6179-6180] [2023-11-19 05:12:11,397 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("771:\n\tcall *%c2;\n772:\n.pushsection .parainstructions,\"a\"\n .balign 8 \n .quad 771b\n .byte %c1\n .byte 772b-771b\n .short %c3\n.popsection\n": "=a" (__eax): [paravirt_typenum] "i" (44UL), [paravirt_opptr] "i" (& pv_irq_ops.save_fl.func), [paravirt_clobber] "i" (1): "memory", "cc"); [6185-6187] [2023-11-19 05:12:11,573 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_58edc365-9290-415a-9fb6-4989135a3047/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i[247200,247213] [2023-11-19 05:12:11,594 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:12:11,770 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:12:11,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:11 WrapperNode [2023-11-19 05:12:11,772 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:12:11,774 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:12:11,774 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:12:11,775 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:12:11,783 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:11" (1/1) ... [2023-11-19 05:12:11,904 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:11" (1/1) ... [2023-11-19 05:12:12,060 INFO L138 Inliner]: procedures = 216, calls = 1507, calls flagged for inlining = 108, calls inlined = 97, statements flattened = 3359 [2023-11-19 05:12:12,060 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:12:12,061 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:12:12,061 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:12:12,061 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:12:12,072 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:11" (1/1) ... [2023-11-19 05:12:12,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:11" (1/1) ... [2023-11-19 05:12:12,092 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:11" (1/1) ... [2023-11-19 05:12:12,093 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:11" (1/1) ... [2023-11-19 05:12:12,198 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:11" (1/1) ... [2023-11-19 05:12:12,215 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:11" (1/1) ... [2023-11-19 05:12:12,239 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:11" (1/1) ... [2023-11-19 05:12:12,256 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:11" (1/1) ... [2023-11-19 05:12:12,280 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:12:12,282 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:12:12,282 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:12:12,282 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:12:12,283 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:11" (1/1) ... [2023-11-19 05:12:12,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:12:12,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:12:12,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:12:12,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_58edc365-9290-415a-9fb6-4989135a3047/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:12:12,372 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2023-11-19 05:12:12,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2023-11-19 05:12:12,375 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_free_iso_urbs [2023-11-19 05:12:12,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_free_iso_urbs [2023-11-19 05:12:12,376 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-19 05:12:12,376 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-19 05:12:12,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-19 05:12:12,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-19 05:12:12,377 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2023-11-19 05:12:12,377 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2023-11-19 05:12:12,377 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_unregister_adapter [2023-11-19 05:12:12,377 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_unregister_adapter [2023-11-19 05:12:12,377 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 05:12:12,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 05:12:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_iso_mutex_of_ttusb_dec [2023-11-19 05:12:12,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_iso_mutex_of_ttusb_dec [2023-11-19 05:12:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_iso_xfer [2023-11-19 05:12:12,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_iso_xfer [2023-11-19 05:12:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-19 05:12:12,379 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-19 05:12:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-19 05:12:12,380 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-19 05:12:12,381 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_usb_mutex_of_ttusb_dec [2023-11-19 05:12:12,381 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_usb_mutex_of_ttusb_dec [2023-11-19 05:12:12,381 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmx_release [2023-11-19 05:12:12,381 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmx_release [2023-11-19 05:12:12,382 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-19 05:12:12,382 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-19 05:12:12,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:12:12,383 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2023-11-19 05:12:12,383 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2023-11-19 05:12:12,383 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-19 05:12:12,383 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-19 05:12:12,384 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 05:12:12,384 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-19 05:12:12,384 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-19 05:12:12,384 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2023-11-19 05:12:12,384 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2023-11-19 05:12:12,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:12:12,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 05:12:12,385 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-19 05:12:12,386 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-19 05:12:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-19 05:12:12,386 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-19 05:12:12,386 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2023-11-19 05:12:12,387 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2023-11-19 05:12:12,387 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-19 05:12:12,387 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-19 05:12:12,387 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-19 05:12:12,387 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-19 05:12:12,387 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2023-11-19 05:12:12,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2023-11-19 05:12:12,388 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-19 05:12:12,388 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-19 05:12:12,388 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-19 05:12:12,389 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-19 05:12:12,389 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_set_model [2023-11-19 05:12:12,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_set_model [2023-11-19 05:12:12,390 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2023-11-19 05:12:12,391 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2023-11-19 05:12:12,391 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2023-11-19 05:12:12,392 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2023-11-19 05:12:12,392 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_stop_iso_xfer [2023-11-19 05:12:12,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_stop_iso_xfer [2023-11-19 05:12:12,392 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-19 05:12:12,392 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-19 05:12:12,392 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_filter_pes2ts_init [2023-11-19 05:12:12,393 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_filter_pes2ts_init [2023-11-19 05:12:12,393 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-19 05:12:12,393 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2023-11-19 05:12:12,394 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2023-11-19 05:12:12,394 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-19 05:12:12,395 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-19 05:12:12,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 05:12:12,395 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~X~$Pointer$~X~int~TO~int [2023-11-19 05:12:12,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~X~$Pointer$~X~int~TO~int [2023-11-19 05:12:12,396 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2023-11-19 05:12:12,396 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2023-11-19 05:12:12,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 05:12:12,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-19 05:12:12,397 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-19 05:12:12,397 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-19 05:12:12,397 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-19 05:12:12,398 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-19 05:12:12,398 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-19 05:12:12,398 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-19 05:12:12,399 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-19 05:12:12,399 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2023-11-19 05:12:12,399 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2023-11-19 05:12:12,399 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_send_command [2023-11-19 05:12:12,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_send_command [2023-11-19 05:12:12,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 05:12:12,400 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_setup_urbs [2023-11-19 05:12:12,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_setup_urbs [2023-11-19 05:12:12,400 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2023-11-19 05:12:12,400 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2023-11-19 05:12:12,400 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-19 05:12:12,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-19 05:12:12,401 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_set_pids [2023-11-19 05:12:12,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_set_pids [2023-11-19 05:12:12,401 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_exit_usb [2023-11-19 05:12:12,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_exit_usb [2023-11-19 05:12:12,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:12:12,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:12:12,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 05:12:12,402 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_iso_mutex_of_ttusb_dec [2023-11-19 05:12:12,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_iso_mutex_of_ttusb_dec [2023-11-19 05:12:12,403 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-19 05:12:12,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-19 05:12:12,403 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-19 05:12:12,404 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-19 05:12:12,404 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmxdev_release [2023-11-19 05:12:12,404 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmxdev_release [2023-11-19 05:12:12,404 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-19 05:12:12,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-19 05:12:12,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 05:12:12,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:12:12,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:12:13,160 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:12:13,167 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:12:20,311 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:12:21,479 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:12:21,479 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 05:12:21,496 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:21 BoogieIcfgContainer [2023-11-19 05:12:21,496 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:12:21,500 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:12:21,501 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:12:21,504 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:12:21,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:12:08" (1/3) ... [2023-11-19 05:12:21,507 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56214519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:21, skipping insertion in model container [2023-11-19 05:12:21,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:12:11" (2/3) ... [2023-11-19 05:12:21,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56214519 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:12:21, skipping insertion in model container [2023-11-19 05:12:21,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:12:21" (3/3) ... [2023-11-19 05:12:21,510 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2023-11-19 05:12:21,532 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:12:21,533 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 05:12:21,634 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:12:21,643 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;@5193f77e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:12:21,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 05:12:21,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 886 states, 562 states have (on average 1.3345195729537367) internal successors, (750), 582 states have internal predecessors, (750), 271 states have call successors, (271), 51 states have call predecessors, (271), 51 states have return successors, (271), 265 states have call predecessors, (271), 271 states have call successors, (271) [2023-11-19 05:12:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 05:12:21,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:21,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:21,670 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:21,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:21,683 INFO L85 PathProgramCache]: Analyzing trace with hash 115152724, now seen corresponding path program 1 times [2023-11-19 05:12:21,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:21,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30230391] [2023-11-19 05:12:21,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:21,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:12:22,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:22,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30230391] [2023-11-19 05:12:22,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30230391] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:22,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:22,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:12:22,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714094228] [2023-11-19 05:12:22,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:22,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:22,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:22,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:22,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:22,495 INFO L87 Difference]: Start difference. First operand has 886 states, 562 states have (on average 1.3345195729537367) internal successors, (750), 582 states have internal predecessors, (750), 271 states have call successors, (271), 51 states have call predecessors, (271), 51 states have return successors, (271), 265 states have call predecessors, (271), 271 states have call successors, (271) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:12:26,762 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 [] [2023-11-19 05:12:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:27,406 INFO L93 Difference]: Finished difference Result 2606 states and 3855 transitions. [2023-11-19 05:12:27,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:27,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-19 05:12:27,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:27,439 INFO L225 Difference]: With dead ends: 2606 [2023-11-19 05:12:27,439 INFO L226 Difference]: Without dead ends: 1717 [2023-11-19 05:12:27,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:27,460 INFO L413 NwaCegarLoop]: 1182 mSDtfsCounter, 1233 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 2311 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:27,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 2311 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-19 05:12:27,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2023-11-19 05:12:27,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1713. [2023-11-19 05:12:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1713 states, 1091 states have (on average 1.3272227314390468) internal successors, (1448), 1121 states have internal predecessors, (1448), 523 states have call successors, (523), 100 states have call predecessors, (523), 98 states have return successors, (523), 501 states have call predecessors, (523), 515 states have call successors, (523) [2023-11-19 05:12:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 2494 transitions. [2023-11-19 05:12:27,697 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 2494 transitions. Word has length 7 [2023-11-19 05:12:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:27,698 INFO L495 AbstractCegarLoop]: Abstraction has 1713 states and 2494 transitions. [2023-11-19 05:12:27,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:12:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 2494 transitions. [2023-11-19 05:12:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 05:12:27,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:27,699 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:27,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 05:12:27,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:27,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash -725755428, now seen corresponding path program 1 times [2023-11-19 05:12:27,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:27,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865716130] [2023-11-19 05:12:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:27,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:12:27,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:27,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865716130] [2023-11-19 05:12:27,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865716130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:27,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:27,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:12:27,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847843393] [2023-11-19 05:12:27,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:27,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:27,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:27,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:27,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:27,890 INFO L87 Difference]: Start difference. First operand 1713 states and 2494 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:12:30,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:12:31,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:31,066 INFO L93 Difference]: Finished difference Result 1715 states and 2495 transitions. [2023-11-19 05:12:31,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:31,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 05:12:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:31,090 INFO L225 Difference]: With dead ends: 1715 [2023-11-19 05:12:31,090 INFO L226 Difference]: Without dead ends: 1712 [2023-11-19 05:12:31,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:31,094 INFO L413 NwaCegarLoop]: 1150 mSDtfsCounter, 1272 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:31,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1272 Valid, 1150 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-19 05:12:31,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2023-11-19 05:12:31,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1712. [2023-11-19 05:12:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1091 states have (on average 1.3263061411549038) internal successors, (1447), 1120 states have internal predecessors, (1447), 522 states have call successors, (522), 100 states have call predecessors, (522), 98 states have return successors, (523), 501 states have call predecessors, (523), 515 states have call successors, (523) [2023-11-19 05:12:31,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2492 transitions. [2023-11-19 05:12:31,280 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2492 transitions. Word has length 8 [2023-11-19 05:12:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:31,281 INFO L495 AbstractCegarLoop]: Abstraction has 1712 states and 2492 transitions. [2023-11-19 05:12:31,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:12:31,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2492 transitions. [2023-11-19 05:12:31,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 05:12:31,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:31,283 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:31,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 05:12:31,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:31,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:31,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1024099497, now seen corresponding path program 1 times [2023-11-19 05:12:31,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:31,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502719701] [2023-11-19 05:12:31,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:31,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:12:31,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:31,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502719701] [2023-11-19 05:12:31,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502719701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:31,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:31,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:12:31,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235034843] [2023-11-19 05:12:31,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:31,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:31,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:31,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:31,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:31,585 INFO L87 Difference]: Start difference. First operand 1712 states and 2492 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:12:34,211 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 [] [2023-11-19 05:12:34,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:34,872 INFO L93 Difference]: Finished difference Result 1714 states and 2493 transitions. [2023-11-19 05:12:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:34,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-19 05:12:34,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:34,893 INFO L225 Difference]: With dead ends: 1714 [2023-11-19 05:12:34,893 INFO L226 Difference]: Without dead ends: 1711 [2023-11-19 05:12:34,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:34,896 INFO L413 NwaCegarLoop]: 1148 mSDtfsCounter, 1269 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:34,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1269 Valid, 1148 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2023-11-19 05:12:34,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2023-11-19 05:12:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1711. [2023-11-19 05:12:35,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1711 states, 1091 states have (on average 1.3253895508707607) internal successors, (1446), 1119 states have internal predecessors, (1446), 521 states have call successors, (521), 100 states have call predecessors, (521), 98 states have return successors, (523), 501 states have call predecessors, (523), 515 states have call successors, (523) [2023-11-19 05:12:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2490 transitions. [2023-11-19 05:12:35,086 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2490 transitions. Word has length 9 [2023-11-19 05:12:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:35,087 INFO L495 AbstractCegarLoop]: Abstraction has 1711 states and 2490 transitions. [2023-11-19 05:12:35,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:12:35,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2490 transitions. [2023-11-19 05:12:35,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 05:12:35,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:35,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 05:12:35,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 05:12:35,089 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:35,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:35,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1682826177, now seen corresponding path program 1 times [2023-11-19 05:12:35,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:35,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015433149] [2023-11-19 05:12:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:35,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:12:35,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:35,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015433149] [2023-11-19 05:12:35,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015433149] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:35,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:35,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:12:35,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410998680] [2023-11-19 05:12:35,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:35,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:35,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:35,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:35,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:35,253 INFO L87 Difference]: Start difference. First operand 1711 states and 2490 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:12:38,322 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 [] [2023-11-19 05:12:40,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:12:42,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-19 05:12:43,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:43,477 INFO L93 Difference]: Finished difference Result 3300 states and 4846 transitions. [2023-11-19 05:12:43,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:43,480 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 05:12:43,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:43,520 INFO L225 Difference]: With dead ends: 3300 [2023-11-19 05:12:43,520 INFO L226 Difference]: Without dead ends: 3291 [2023-11-19 05:12:43,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:43,524 INFO L413 NwaCegarLoop]: 1191 mSDtfsCounter, 1205 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:43,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 2316 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 2 Unknown, 0 Unchecked, 7.9s Time] [2023-11-19 05:12:43,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2023-11-19 05:12:43,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 3286. [2023-11-19 05:12:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 2102 states have (on average 1.3258801141769743) internal successors, (2787), 2153 states have internal predecessors, (2787), 990 states have call successors, (990), 196 states have call predecessors, (990), 193 states have return successors, (1052), 956 states have call predecessors, (1052), 984 states have call successors, (1052) [2023-11-19 05:12:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4829 transitions. [2023-11-19 05:12:43,950 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4829 transitions. Word has length 10 [2023-11-19 05:12:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:43,950 INFO L495 AbstractCegarLoop]: Abstraction has 3286 states and 4829 transitions. [2023-11-19 05:12:43,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:12:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4829 transitions. [2023-11-19 05:12:43,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-19 05:12:43,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:43,973 INFO L195 NwaCegarLoop]: trace histogram [4, 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] [2023-11-19 05:12:43,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 05:12:43,973 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:43,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:43,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1425882113, now seen corresponding path program 1 times [2023-11-19 05:12:43,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:43,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625450756] [2023-11-19 05:12:43,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:43,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:44,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-19 05:12:44,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:44,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625450756] [2023-11-19 05:12:44,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625450756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:44,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:44,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:12:44,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937351994] [2023-11-19 05:12:44,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:44,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:44,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:44,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:44,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:44,643 INFO L87 Difference]: Start difference. First operand 3286 states and 4829 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 05:12:47,047 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 [] [2023-11-19 05:12:48,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:48,658 INFO L93 Difference]: Finished difference Result 6595 states and 9700 transitions. [2023-11-19 05:12:48,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:48,661 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 98 [2023-11-19 05:12:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:48,692 INFO L225 Difference]: With dead ends: 6595 [2023-11-19 05:12:48,692 INFO L226 Difference]: Without dead ends: 3310 [2023-11-19 05:12:48,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:48,712 INFO L413 NwaCegarLoop]: 1145 mSDtfsCounter, 285 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1937 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:48,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1937 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 219 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2023-11-19 05:12:48,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2023-11-19 05:12:49,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 3310. [2023-11-19 05:12:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3310 states, 2126 states have (on average 1.3273753527751646) internal successors, (2822), 2177 states have internal predecessors, (2822), 990 states have call successors, (990), 196 states have call predecessors, (990), 193 states have return successors, (1052), 956 states have call predecessors, (1052), 984 states have call successors, (1052) [2023-11-19 05:12:49,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 4864 transitions. [2023-11-19 05:12:49,064 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 4864 transitions. Word has length 98 [2023-11-19 05:12:49,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:49,065 INFO L495 AbstractCegarLoop]: Abstraction has 3310 states and 4864 transitions. [2023-11-19 05:12:49,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2023-11-19 05:12:49,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 4864 transitions. [2023-11-19 05:12:49,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 05:12:49,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:49,073 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-11-19 05:12:49,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 05:12:49,073 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:49,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:49,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1372770297, now seen corresponding path program 1 times [2023-11-19 05:12:49,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:49,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933073989] [2023-11-19 05:12:49,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:49,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:49,636 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 05:12:49,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:49,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933073989] [2023-11-19 05:12:49,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933073989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:49,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:49,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 05:12:49,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672556497] [2023-11-19 05:12:49,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:49,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:12:49,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:49,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:12:49,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:49,641 INFO L87 Difference]: Start difference. First operand 3310 states and 4864 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 05:12:50,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:12:50,935 INFO L93 Difference]: Finished difference Result 6491 states and 9519 transitions. [2023-11-19 05:12:50,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:12:50,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 107 [2023-11-19 05:12:50,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:12:50,965 INFO L225 Difference]: With dead ends: 6491 [2023-11-19 05:12:50,966 INFO L226 Difference]: Without dead ends: 3182 [2023-11-19 05:12:50,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:12:50,983 INFO L413 NwaCegarLoop]: 1100 mSDtfsCounter, 1191 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 05:12:50,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 1100 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-19 05:12:50,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2023-11-19 05:12:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3182. [2023-11-19 05:12:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3182 states, 2038 states have (on average 1.3179587831207065) internal successors, (2686), 2089 states have internal predecessors, (2686), 950 states have call successors, (950), 196 states have call predecessors, (950), 193 states have return successors, (1008), 916 states have call predecessors, (1008), 944 states have call successors, (1008) [2023-11-19 05:12:51,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 4644 transitions. [2023-11-19 05:12:51,302 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 4644 transitions. Word has length 107 [2023-11-19 05:12:51,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:12:51,305 INFO L495 AbstractCegarLoop]: Abstraction has 3182 states and 4644 transitions. [2023-11-19 05:12:51,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-11-19 05:12:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 4644 transitions. [2023-11-19 05:12:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-19 05:12:51,315 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:12:51,315 INFO L195 NwaCegarLoop]: trace histogram [5, 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] [2023-11-19 05:12:51,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 05:12:51,316 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 05:12:51,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:12:51,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1888326527, now seen corresponding path program 1 times [2023-11-19 05:12:51,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 05:12:51,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634634730] [2023-11-19 05:12:51,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:12:51,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 05:12:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:12:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-19 05:12:52,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 05:12:52,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634634730] [2023-11-19 05:12:52,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634634730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:12:52,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:12:52,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 05:12:52,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579150509] [2023-11-19 05:12:52,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:12:52,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 05:12:52,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 05:12:52,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 05:12:52,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 05:12:52,539 INFO L87 Difference]: Start difference. First operand 3182 states and 4644 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 3 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17)