./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 cf1a7837 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_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX/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_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX --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-cf1a783 [2023-11-12 00:46:36,167 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:46:36,280 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:46:36,287 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:46:36,288 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:46:36,323 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:46:36,324 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:46:36,325 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:46:36,326 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:46:36,331 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:46:36,331 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:46:36,332 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:46:36,333 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:46:36,334 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:46:36,335 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:46:36,335 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:46:36,336 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:46:36,336 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:46:36,336 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:46:36,337 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:46:36,337 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:46:36,338 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:46:36,339 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:46:36,340 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:46:36,340 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:46:36,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:46:36,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:46:36,341 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:46:36,342 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:46:36,342 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:46:36,344 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:46:36,344 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:46:36,344 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:46:36,345 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:36,345 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:46:36,345 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:46:36,345 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:46:36,346 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:46:36,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:46:36,346 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:46:36,346 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:46:36,347 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:46:36,347 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_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 106df4f5c2a241158f9b42d6bacea5fef4152f7015c080096ac6f687357e10b4 [2023-11-12 00:46:36,648 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:46:36,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:46:36,672 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:46:36,673 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:46:36,674 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:46:36,675 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2023-11-12 00:46:39,813 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:46:40,416 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:46:40,417 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffcd891b-30da-4eaf-9663-cae341a379a1/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2023-11-12 00:46:40,471 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX/data/bcf26a1fa/8e4b0b89d6154463902be970ee098aa4/FLAGed9935b38 [2023-11-12 00:46:40,488 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX/data/bcf26a1fa/8e4b0b89d6154463902be970ee098aa4 [2023-11-12 00:46:40,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:46:40,495 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:46:40,498 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:40,499 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:46:40,509 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:46:40,510 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:40" (1/1) ... [2023-11-12 00:46:40,511 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f32d0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:40, skipping insertion in model container [2023-11-12 00:46:40,511 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:46:40" (1/1) ... [2023-11-12 00:46:40,659 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:46:42,395 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_ffcd891b-30da-4eaf-9663-cae341a379a1/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] [2023-11-12 00:46:42,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:42,528 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:46:42,737 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] [2023-11-12 00:46:42,739 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] [2023-11-12 00:46:42,739 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("bswapl %0": "=r" (val): "0" (val)); [6119] [2023-11-12 00:46:42,742 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] [2023-11-12 00:46:42,743 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] [2023-11-12 00:46:42,965 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_ffcd891b-30da-4eaf-9663-cae341a379a1/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] [2023-11-12 00:46:42,987 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:46:43,057 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:46:43,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:43 WrapperNode [2023-11-12 00:46:43,057 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:46:43,059 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:43,059 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:46:43,059 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:46:43,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:43" (1/1) ... [2023-11-12 00:46:43,178 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:43" (1/1) ... [2023-11-12 00:46:43,291 INFO L138 Inliner]: procedures = 216, calls = 1507, calls flagged for inlining = 108, calls inlined = 97, statements flattened = 3359 [2023-11-12 00:46:43,291 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:46:43,292 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:46:43,292 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:46:43,292 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:46:43,301 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:43" (1/1) ... [2023-11-12 00:46:43,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:43" (1/1) ... [2023-11-12 00:46:43,319 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:43" (1/1) ... [2023-11-12 00:46:43,320 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:43" (1/1) ... [2023-11-12 00:46:43,520 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:43" (1/1) ... [2023-11-12 00:46:43,561 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:43" (1/1) ... [2023-11-12 00:46:43,596 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:43" (1/1) ... [2023-11-12 00:46:43,618 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:43" (1/1) ... [2023-11-12 00:46:43,657 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:46:43,658 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:46:43,659 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:46:43,659 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:46:43,660 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:43" (1/1) ... [2023-11-12 00:46:43,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:46:43,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:46:43,698 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:46:43,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ffcd891b-30da-4eaf-9663-cae341a379a1/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:46:43,745 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2023-11-12 00:46:43,745 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2023-11-12 00:46:43,747 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_free_iso_urbs [2023-11-12 00:46:43,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_free_iso_urbs [2023-11-12 00:46:43,747 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2023-11-12 00:46:43,748 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2023-11-12 00:46:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-12 00:46:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-12 00:46:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2023-11-12 00:46:43,748 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2023-11-12 00:46:43,748 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_unregister_adapter [2023-11-12 00:46:43,749 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_unregister_adapter [2023-11-12 00:46:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-12 00:46:43,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-12 00:46:43,749 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_iso_mutex_of_ttusb_dec [2023-11-12 00:46:43,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_iso_mutex_of_ttusb_dec [2023-11-12 00:46:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_start_iso_xfer [2023-11-12 00:46:43,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_start_iso_xfer [2023-11-12 00:46:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-12 00:46:43,750 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-12 00:46:43,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-12 00:46:43,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-12 00:46:43,751 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_usb_mutex_of_ttusb_dec [2023-11-12 00:46:43,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_usb_mutex_of_ttusb_dec [2023-11-12 00:46:43,752 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmx_release [2023-11-12 00:46:43,752 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmx_release [2023-11-12 00:46:43,753 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-12 00:46:43,753 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-12 00:46:43,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:46:43,753 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2023-11-12 00:46:43,753 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2023-11-12 00:46:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2023-11-12 00:46:43,754 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2023-11-12 00:46:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:46:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-12 00:46:43,754 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-12 00:46:43,754 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2023-11-12 00:46:43,755 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2023-11-12 00:46:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:46:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:46:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-12 00:46:43,755 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-12 00:46:43,755 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2023-11-12 00:46:43,755 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2023-11-12 00:46:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2023-11-12 00:46:43,756 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2023-11-12 00:46:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-12 00:46:43,756 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-12 00:46:43,756 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2023-11-12 00:46:43,756 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2023-11-12 00:46:43,757 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2023-11-12 00:46:43,757 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2023-11-12 00:46:43,757 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-12 00:46:43,757 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-12 00:46:43,757 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2023-11-12 00:46:43,757 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2023-11-12 00:46:43,757 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_set_model [2023-11-12 00:46:43,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_set_model [2023-11-12 00:46:43,758 INFO L130 BoogieDeclarations]: Found specification of procedure release_firmware [2023-11-12 00:46:43,759 INFO L138 BoogieDeclarations]: Found implementation of procedure release_firmware [2023-11-12 00:46:43,760 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2023-11-12 00:46:43,760 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2023-11-12 00:46:43,760 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_stop_iso_xfer [2023-11-12 00:46:43,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_stop_iso_xfer [2023-11-12 00:46:43,761 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2023-11-12 00:46:43,761 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2023-11-12 00:46:43,761 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_filter_pes2ts_init [2023-11-12 00:46:43,761 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_filter_pes2ts_init [2023-11-12 00:46:43,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-12 00:46:43,762 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2023-11-12 00:46:43,762 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2023-11-12 00:46:43,763 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2023-11-12 00:46:43,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2023-11-12 00:46:43,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-12 00:46:43,763 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~X~$Pointer$~X~int~TO~int [2023-11-12 00:46:43,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~X~$Pointer$~X~int~TO~int [2023-11-12 00:46:43,763 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2023-11-12 00:46:43,764 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2023-11-12 00:46:43,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:46:43,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-12 00:46:43,764 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-12 00:46:43,764 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2023-11-12 00:46:43,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2023-11-12 00:46:43,765 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2023-11-12 00:46:43,766 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2023-11-12 00:46:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-12 00:46:43,766 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-12 00:46:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2023-11-12 00:46:43,766 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2023-11-12 00:46:43,766 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_send_command [2023-11-12 00:46:43,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_send_command [2023-11-12 00:46:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:46:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_setup_urbs [2023-11-12 00:46:43,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_setup_urbs [2023-11-12 00:46:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2023-11-12 00:46:43,767 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2023-11-12 00:46:43,767 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-12 00:46:43,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-12 00:46:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_set_pids [2023-11-12 00:46:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_set_pids [2023-11-12 00:46:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure ttusb_dec_exit_usb [2023-11-12 00:46:43,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ttusb_dec_exit_usb [2023-11-12 00:46:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:46:43,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:46:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:46:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_iso_mutex_of_ttusb_dec [2023-11-12 00:46:43,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_iso_mutex_of_ttusb_dec [2023-11-12 00:46:43,769 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 00:46:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2023-11-12 00:46:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2023-11-12 00:46:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2023-11-12 00:46:43,770 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_dmxdev_release [2023-11-12 00:46:43,770 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_dmxdev_release [2023-11-12 00:46:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-12 00:46:43,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2023-11-12 00:46:43,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:46:43,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:46:43,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:46:44,490 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:46:44,493 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:46:52,451 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:46:53,497 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:46:53,498 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:46:53,504 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:53 BoogieIcfgContainer [2023-11-12 00:46:53,504 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:46:53,507 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:46:53,507 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:46:53,510 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:46:53,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:46:40" (1/3) ... [2023-11-12 00:46:53,512 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e61729a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:53, skipping insertion in model container [2023-11-12 00:46:53,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:46:43" (2/3) ... [2023-11-12 00:46:53,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e61729a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:46:53, skipping insertion in model container [2023-11-12 00:46:53,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:46:53" (3/3) ... [2023-11-12 00:46:53,516 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--media--usb--ttusb-dec--ttusb_dec.ko-ldv_main0.cil.out.i [2023-11-12 00:46:53,537 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:46:53,538 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:46:53,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:46:53,685 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;@195319af, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:46:53,686 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:46:53,697 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) [2023-11-12 00:46:53,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-12 00:46:53,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:53,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:53,707 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:53,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:53,718 INFO L85 PathProgramCache]: Analyzing trace with hash 115152724, now seen corresponding path program 1 times [2023-11-12 00:46:53,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:53,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647513866] [2023-11-12 00:46:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:53,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:54,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:54,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647513866] [2023-11-12 00:46:54,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647513866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:54,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:54,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:46:54,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040881168] [2023-11-12 00:46:54,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:54,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:46:54,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:54,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:46:54,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:46:54,344 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) [2023-11-12 00:46:56,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:46:58,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:46:59,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:46:59,359 INFO L93 Difference]: Finished difference Result 2606 states and 3855 transitions. [2023-11-12 00:46:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:46:59,363 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 [2023-11-12 00:46:59,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:46:59,392 INFO L225 Difference]: With dead ends: 2606 [2023-11-12 00:46:59,392 INFO L226 Difference]: Without dead ends: 1717 [2023-11-12 00:46:59,407 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 [2023-11-12 00:46:59,411 INFO L413 NwaCegarLoop]: 1182 mSDtfsCounter, 1233 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s 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, 4.7s IncrementalHoareTripleChecker+Time [2023-11-12 00:46:59,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1233 Valid, 2311 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-12 00:46:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2023-11-12 00:46:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1713. [2023-11-12 00:46:59,614 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) [2023-11-12 00:46:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 2494 transitions. [2023-11-12 00:46:59,636 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 2494 transitions. Word has length 7 [2023-11-12 00:46:59,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:46:59,637 INFO L495 AbstractCegarLoop]: Abstraction has 1713 states and 2494 transitions. [2023-11-12 00:46:59,637 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) [2023-11-12 00:46:59,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 2494 transitions. [2023-11-12 00:46:59,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-12 00:46:59,638 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:46:59,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:46:59,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:46:59,639 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:46:59,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:46:59,640 INFO L85 PathProgramCache]: Analyzing trace with hash -725755428, now seen corresponding path program 1 times [2023-11-12 00:46:59,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:46:59,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664176636] [2023-11-12 00:46:59,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:46:59,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:46:59,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:46:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:46:59,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:46:59,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664176636] [2023-11-12 00:46:59,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664176636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:46:59,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:46:59,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:46:59,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132583784] [2023-11-12 00:46:59,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:46:59,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:46:59,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:46:59,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:46:59,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:46:59,809 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) [2023-11-12 00:47:01,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:01,795 INFO L93 Difference]: Finished difference Result 1715 states and 2495 transitions. [2023-11-12 00:47:01,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:01,799 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 [2023-11-12 00:47:01,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:01,813 INFO L225 Difference]: With dead ends: 1715 [2023-11-12 00:47:01,813 INFO L226 Difference]: Without dead ends: 1712 [2023-11-12 00:47:01,815 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 [2023-11-12 00:47:01,816 INFO L413 NwaCegarLoop]: 1150 mSDtfsCounter, 1272 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s 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, 1.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:01,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1272 Valid, 1150 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-12 00:47:01,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2023-11-12 00:47:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1712. [2023-11-12 00:47:02,050 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) [2023-11-12 00:47:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2492 transitions. [2023-11-12 00:47:02,067 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2492 transitions. Word has length 8 [2023-11-12 00:47:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:02,068 INFO L495 AbstractCegarLoop]: Abstraction has 1712 states and 2492 transitions. [2023-11-12 00:47:02,068 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) [2023-11-12 00:47:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2492 transitions. [2023-11-12 00:47:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-12 00:47:02,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:02,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:02,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:47:02,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:02,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:02,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1024099497, now seen corresponding path program 1 times [2023-11-12 00:47:02,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:02,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442137768] [2023-11-12 00:47:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:02,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:02,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:02,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:02,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442137768] [2023-11-12 00:47:02,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442137768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:02,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:02,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:47:02,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539470540] [2023-11-12 00:47:02,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:02,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:02,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:02,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:02,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:47:02,243 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) [2023-11-12 00:47:04,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:47:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:05,789 INFO L93 Difference]: Finished difference Result 1714 states and 2493 transitions. [2023-11-12 00:47:05,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:05,793 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 [2023-11-12 00:47:05,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:05,807 INFO L225 Difference]: With dead ends: 1714 [2023-11-12 00:47:05,808 INFO L226 Difference]: Without dead ends: 1711 [2023-11-12 00:47:05,809 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 [2023-11-12 00:47:05,811 INFO L413 NwaCegarLoop]: 1148 mSDtfsCounter, 1269 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:05,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1269 Valid, 1148 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-12 00:47:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2023-11-12 00:47:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1711. [2023-11-12 00:47:05,931 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) [2023-11-12 00:47:05,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1711 states to 1711 states and 2490 transitions. [2023-11-12 00:47:05,948 INFO L78 Accepts]: Start accepts. Automaton has 1711 states and 2490 transitions. Word has length 9 [2023-11-12 00:47:05,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:05,948 INFO L495 AbstractCegarLoop]: Abstraction has 1711 states and 2490 transitions. [2023-11-12 00:47:05,949 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) [2023-11-12 00:47:05,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1711 states and 2490 transitions. [2023-11-12 00:47:05,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-12 00:47:05,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:05,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:05,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:47:05,950 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:05,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:05,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1682826177, now seen corresponding path program 1 times [2023-11-12 00:47:05,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:05,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799858106] [2023-11-12 00:47:05,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:05,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:47:06,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:06,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799858106] [2023-11-12 00:47:06,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799858106] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:06,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:06,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:47:06,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460029515] [2023-11-12 00:47:06,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:06,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:06,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:06,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:06,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:47:06,077 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) [2023-11-12 00:47:08,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:47:11,182 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 [] [2023-11-12 00:47:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:11,951 INFO L93 Difference]: Finished difference Result 3300 states and 4846 transitions. [2023-11-12 00:47:11,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:11,955 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 [2023-11-12 00:47:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:11,983 INFO L225 Difference]: With dead ends: 3300 [2023-11-12 00:47:11,983 INFO L226 Difference]: Without dead ends: 3291 [2023-11-12 00:47:11,986 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 [2023-11-12 00:47:11,987 INFO L413 NwaCegarLoop]: 1191 mSDtfsCounter, 1205 mSDsluCounter, 1125 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:11,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 2316 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2023-11-12 00:47:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3291 states. [2023-11-12 00:47:12,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3291 to 3286. [2023-11-12 00:47:12,237 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) [2023-11-12 00:47:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4829 transitions. [2023-11-12 00:47:12,271 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4829 transitions. Word has length 10 [2023-11-12 00:47:12,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:12,272 INFO L495 AbstractCegarLoop]: Abstraction has 3286 states and 4829 transitions. [2023-11-12 00:47:12,272 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) [2023-11-12 00:47:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4829 transitions. [2023-11-12 00:47:12,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-11-12 00:47:12,285 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:12,286 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] [2023-11-12 00:47:12,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 00:47:12,286 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:12,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:12,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1425882113, now seen corresponding path program 1 times [2023-11-12 00:47:12,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:12,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625276806] [2023-11-12 00:47:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:12,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-12 00:47:12,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:12,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625276806] [2023-11-12 00:47:12,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625276806] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:12,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:12,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:47:12,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911715964] [2023-11-12 00:47:12,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:12,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:12,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:12,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:12,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:47:12,724 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) [2023-11-12 00:47:15,035 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 [] [2023-11-12 00:47:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:16,151 INFO L93 Difference]: Finished difference Result 6595 states and 9700 transitions. [2023-11-12 00:47:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:16,158 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 [2023-11-12 00:47:16,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:16,185 INFO L225 Difference]: With dead ends: 6595 [2023-11-12 00:47:16,186 INFO L226 Difference]: Without dead ends: 3310 [2023-11-12 00:47:16,202 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 [2023-11-12 00:47:16,203 INFO L413 NwaCegarLoop]: 1145 mSDtfsCounter, 285 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s 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, 3.2s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:16,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1937 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 219 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2023-11-12 00:47:16,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2023-11-12 00:47:16,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 3310. [2023-11-12 00:47:16,538 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) [2023-11-12 00:47:16,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3310 states to 3310 states and 4864 transitions. [2023-11-12 00:47:16,563 INFO L78 Accepts]: Start accepts. Automaton has 3310 states and 4864 transitions. Word has length 98 [2023-11-12 00:47:16,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:16,564 INFO L495 AbstractCegarLoop]: Abstraction has 3310 states and 4864 transitions. [2023-11-12 00:47:16,564 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) [2023-11-12 00:47:16,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3310 states and 4864 transitions. [2023-11-12 00:47:16,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-12 00:47:16,572 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:16,572 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] [2023-11-12 00:47:16,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 00:47:16,573 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:16,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:16,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1372770297, now seen corresponding path program 1 times [2023-11-12 00:47:16,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:16,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226024388] [2023-11-12 00:47:16,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:16,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-12 00:47:17,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:17,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226024388] [2023-11-12 00:47:17,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226024388] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:17,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:17,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:47:17,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866972312] [2023-11-12 00:47:17,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:17,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:47:17,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:17,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:47:17,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:47:17,070 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) [2023-11-12 00:47:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:18,169 INFO L93 Difference]: Finished difference Result 6491 states and 9519 transitions. [2023-11-12 00:47:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:47:18,172 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 [2023-11-12 00:47:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:18,199 INFO L225 Difference]: With dead ends: 6491 [2023-11-12 00:47:18,199 INFO L226 Difference]: Without dead ends: 3182 [2023-11-12 00:47:18,216 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 [2023-11-12 00:47:18,217 INFO L413 NwaCegarLoop]: 1100 mSDtfsCounter, 1191 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s 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, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:18,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1191 Valid, 1100 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 00:47:18,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2023-11-12 00:47:18,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 3182. [2023-11-12 00:47:18,520 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) [2023-11-12 00:47:18,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 4644 transitions. [2023-11-12 00:47:18,538 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 4644 transitions. Word has length 107 [2023-11-12 00:47:18,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:18,539 INFO L495 AbstractCegarLoop]: Abstraction has 3182 states and 4644 transitions. [2023-11-12 00:47:18,539 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) [2023-11-12 00:47:18,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 4644 transitions. [2023-11-12 00:47:18,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-12 00:47:18,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:18,543 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] [2023-11-12 00:47:18,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 00:47:18,543 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:18,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1888326527, now seen corresponding path program 1 times [2023-11-12 00:47:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:18,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718277432] [2023-11-12 00:47:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:18,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-12 00:47:19,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:19,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718277432] [2023-11-12 00:47:19,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718277432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:19,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:19,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:47:19,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438049026] [2023-11-12 00:47:19,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:19,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:47:19,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:19,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:47:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:47:19,561 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) [2023-11-12 00:47:22,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:22,029 INFO L93 Difference]: Finished difference Result 3204 states and 4679 transitions. [2023-11-12 00:47:22,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:47:22,030 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 113 [2023-11-12 00:47:22,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:22,056 INFO L225 Difference]: With dead ends: 3204 [2023-11-12 00:47:22,057 INFO L226 Difference]: Without dead ends: 3201 [2023-11-12 00:47:22,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:47:22,060 INFO L413 NwaCegarLoop]: 1111 mSDtfsCounter, 61 mSDsluCounter, 2064 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 3175 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:22,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 3175 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-12 00:47:22,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2023-11-12 00:47:22,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 3201. [2023-11-12 00:47:22,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 2050 states have (on average 1.3170731707317074) internal successors, (2700), 2102 states have internal predecessors, (2700), 949 states have call successors, (949), 202 states have call predecessors, (949), 201 states have return successors, (1026), 916 states have call predecessors, (1026), 944 states have call successors, (1026) [2023-11-12 00:47:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 4675 transitions. [2023-11-12 00:47:22,378 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 4675 transitions. Word has length 113 [2023-11-12 00:47:22,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:22,380 INFO L495 AbstractCegarLoop]: Abstraction has 3201 states and 4675 transitions. [2023-11-12 00:47:22,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-11-12 00:47:22,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 4675 transitions. [2023-11-12 00:47:22,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-12 00:47:22,387 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:22,387 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:47:22,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 00:47:22,391 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:22,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:22,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1709260436, now seen corresponding path program 1 times [2023-11-12 00:47:22,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:22,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073134157] [2023-11-12 00:47:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:22,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:47:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-12 00:47:22,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:47:22,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073134157] [2023-11-12 00:47:22,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073134157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:47:22,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:47:22,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 00:47:22,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312247637] [2023-11-12 00:47:22,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:47:22,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 00:47:22,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:47:22,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 00:47:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 00:47:22,735 INFO L87 Difference]: Start difference. First operand 3201 states and 4675 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:47:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:47:24,926 INFO L93 Difference]: Finished difference Result 6420 states and 9372 transitions. [2023-11-12 00:47:24,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 00:47:24,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 124 [2023-11-12 00:47:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:47:24,955 INFO L225 Difference]: With dead ends: 6420 [2023-11-12 00:47:24,955 INFO L226 Difference]: Without dead ends: 3216 [2023-11-12 00:47:24,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:47:24,974 INFO L413 NwaCegarLoop]: 1109 mSDtfsCounter, 15 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 3308 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:47:24,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 3308 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-12 00:47:24,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3216 states. [2023-11-12 00:47:25,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3216 to 3205. [2023-11-12 00:47:25,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3205 states, 2055 states have (on average 1.315815085158151) internal successors, (2704), 2107 states have internal predecessors, (2704), 948 states have call successors, (948), 202 states have call predecessors, (948), 201 states have return successors, (1025), 915 states have call predecessors, (1025), 943 states have call successors, (1025) [2023-11-12 00:47:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3205 states to 3205 states and 4677 transitions. [2023-11-12 00:47:25,320 INFO L78 Accepts]: Start accepts. Automaton has 3205 states and 4677 transitions. Word has length 124 [2023-11-12 00:47:25,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:47:25,320 INFO L495 AbstractCegarLoop]: Abstraction has 3205 states and 4677 transitions. [2023-11-12 00:47:25,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2023-11-12 00:47:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 3205 states and 4677 transitions. [2023-11-12 00:47:25,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-12 00:47:25,327 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:47:25,328 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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] [2023-11-12 00:47:25,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 00:47:25,328 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:47:25,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:47:25,329 INFO L85 PathProgramCache]: Analyzing trace with hash -200236823, now seen corresponding path program 1 times [2023-11-12 00:47:25,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:47:25,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175550349] [2023-11-12 00:47:25,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:47:25,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:47:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat