./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 983ce5e5a67d7f1a953a7dc1806bc74e6e7b7100ad78daf1e74f2f1bd8e39c48 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:09:24,546 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:09:24,616 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-12-02 18:09:24,622 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:09:24,623 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:09:24,649 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:09:24,650 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:09:24,651 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:09:24,652 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:09:24,652 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:09:24,653 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:09:24,653 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:09:24,654 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:09:24,654 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:09:24,655 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:09:24,655 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:09:24,656 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:09:24,656 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:09:24,657 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:09:24,657 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:09:24,658 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:09:24,659 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:09:24,660 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:09:24,660 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 18:09:24,661 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:09:24,661 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:09:24,662 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 18:09:24,662 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:09:24,662 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 18:09:24,663 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 18:09:24,663 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:09:24,664 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:09:24,664 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:09:24,664 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:09:24,664 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:09:24,665 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:09:24,665 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:09:24,665 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 18:09:24,665 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:09:24,666 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:09:24,666 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:09:24,666 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 18:09:24,666 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:09:24,667 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:09:24,667 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_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 983ce5e5a67d7f1a953a7dc1806bc74e6e7b7100ad78daf1e74f2f1bd8e39c48 [2023-12-02 18:09:24,885 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:09:24,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:09:24,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:09:24,909 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:09:24,910 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:09:24,911 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2023-12-02 18:09:27,708 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:09:28,119 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:09:28,119 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2023-12-02 18:09:28,155 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/data/d3bfeffe5/648ad16199844675ae4b54811b51f6d3/FLAG9e4f07b34 [2023-12-02 18:09:28,169 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/data/d3bfeffe5/648ad16199844675ae4b54811b51f6d3 [2023-12-02 18:09:28,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:09:28,173 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:09:28,175 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:09:28,175 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:09:28,180 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:09:28,180 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:09:28" (1/1) ... [2023-12-02 18:09:28,181 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e4f460f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:09:28, skipping insertion in model container [2023-12-02 18:09:28,182 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:09:28" (1/1) ... [2023-12-02 18:09:28,320 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:09:29,537 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_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i[239406,239419] [2023-12-02 18:09:29,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:09:29,618 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:09:29,742 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"); [5698] [2023-12-02 18:09:29,743 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; btr %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr)); [5705] [2023-12-02 18:09:29,747 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 *)"./arch/x86/include/asm/paravirt.h"), "i" (831), "i" (12UL)); [5838-5839] [2023-12-02 18:09:29,748 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" (43UL), [paravirt_opptr] "i" (& pv_irq_ops.save_fl.func), [paravirt_clobber] "i" (1): "memory", "cc"); [5844-5846] [2023-12-02 18:09:29,749 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 *)"./arch/x86/include/asm/paravirt.h"), "i" (836), "i" (12UL)); [5868-5869] [2023-12-02 18:09:29,750 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.restore_fl.func), [paravirt_clobber] "i" (1), "D" (f): "memory", "cc"); [5874-5876] [2023-12-02 18:09:29,751 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 *)"./arch/x86/include/asm/paravirt.h"), "i" (841), "i" (12UL)); [5897-5898] [2023-12-02 18:09:29,751 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" (45UL), [paravirt_opptr] "i" (& pv_irq_ops.irq_disable.func), [paravirt_clobber] "i" (1): "memory", "cc"); [5903-5905] [2023-12-02 18:09:29,753 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [5969] [2023-12-02 18:09:29,754 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [5977] [2023-12-02 18:09:29,754 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outw %w0, %w1": : "a" (value), "Nd" (port)); [5984] [2023-12-02 18:09:29,754 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inw %w1, %w0": "=a" (value): "Nd" (port)); [5992] [2023-12-02 18:09:29,755 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inl %w1, %0": "=a" (value): "Nd" (port)); [6000] [2023-12-02 18:09:29,755 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("rep; outsl": "+S" (addr), "+c" (count): "d" (port)); [6007] [2023-12-02 18:09:29,755 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("rep; insl": "+D" (addr), "+c" (count): "d" (port)); [6014] [2023-12-02 18:09:29,853 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_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i[239406,239419] [2023-12-02 18:09:29,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:09:29,990 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:09:29,991 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:09:29 WrapperNode [2023-12-02 18:09:29,991 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:09:29,992 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:09:29,992 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:09:29,992 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:09:29,998 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:09:29" (1/1) ... [2023-12-02 18:09:30,054 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:09:29" (1/1) ... [2023-12-02 18:09:30,158 INFO L138 Inliner]: procedures = 176, calls = 1239, calls flagged for inlining = 86, calls inlined = 83, statements flattened = 3046 [2023-12-02 18:09:30,158 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:09:30,159 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:09:30,159 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:09:30,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:09:30,167 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:09:29" (1/1) ... [2023-12-02 18:09:30,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:09:29" (1/1) ... [2023-12-02 18:09:30,189 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:09:29" (1/1) ... [2023-12-02 18:09:30,189 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:09:29" (1/1) ... [2023-12-02 18:09:30,307 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:09:29" (1/1) ... [2023-12-02 18:09:30,329 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:09:29" (1/1) ... [2023-12-02 18:09:30,347 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:09:29" (1/1) ... [2023-12-02 18:09:30,361 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:09:29" (1/1) ... [2023-12-02 18:09:30,379 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:09:30,380 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:09:30,380 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:09:30,381 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:09:30,381 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:09:29" (1/1) ... [2023-12-02 18:09:30,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:09:30,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:09:30,411 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:09:30,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:09:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure el3_config [2023-12-02 18:09:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_config [2023-12-02 18:09:30,455 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-12-02 18:09:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-12-02 18:09:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 18:09:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-02 18:09:30,456 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-02 18:09:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2023-12-02 18:09:30,456 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2023-12-02 18:09:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2023-12-02 18:09:30,457 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2023-12-02 18:09:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2023-12-02 18:09:30,457 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2023-12-02 18:09:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2023-12-02 18:09:30,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2023-12-02 18:09:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 18:09:30,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 18:09:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2023-12-02 18:09:30,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2023-12-02 18:09:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2023-12-02 18:09:30,458 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2023-12-02 18:09:30,458 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-12-02 18:09:30,459 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-12-02 18:09:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 18:09:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2023-12-02 18:09:30,459 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2023-12-02 18:09:30,459 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-12-02 18:09:30,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-12-02 18:09:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_dev_dbg [2023-12-02 18:09:30,460 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_dev_dbg [2023-12-02 18:09:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-12-02 18:09:30,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-12-02 18:09:30,460 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-12-02 18:09:30,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-12-02 18:09:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 18:09:30,461 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 18:09:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2023-12-02 18:09:30,461 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2023-12-02 18:09:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 18:09:30,461 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_reset [2023-12-02 18:09:30,462 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_reset [2023-12-02 18:09:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:09:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2023-12-02 18:09:30,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2023-12-02 18:09:30,462 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_dev_present [2023-12-02 18:09:30,462 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_dev_present [2023-12-02 18:09:30,463 INFO L130 BoogieDeclarations]: Found specification of procedure __dynamic_netdev_dbg [2023-12-02 18:09:30,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __dynamic_netdev_dbg [2023-12-02 18:09:30,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 18:09:30,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 18:09:30,463 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2023-12-02 18:09:30,463 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2023-12-02 18:09:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure el3_rx [2023-12-02 18:09:30,464 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_rx [2023-12-02 18:09:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2023-12-02 18:09:30,464 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2023-12-02 18:09:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 18:09:30,464 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2023-12-02 18:09:30,465 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2023-12-02 18:09:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2023-12-02 18:09:30,465 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2023-12-02 18:09:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_set_xcvr [2023-12-02 18:09:30,465 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_set_xcvr [2023-12-02 18:09:30,465 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_release [2023-12-02 18:09:30,466 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_release [2023-12-02 18:09:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2023-12-02 18:09:30,466 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2023-12-02 18:09:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2023-12-02 18:09:30,466 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2023-12-02 18:09:30,466 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2023-12-02 18:09:30,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2023-12-02 18:09:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure el3_get_stats [2023-12-02 18:09:30,467 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_get_stats [2023-12-02 18:09:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-12-02 18:09:30,467 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-12-02 18:09:30,467 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_detach [2023-12-02 18:09:30,467 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_detach [2023-12-02 18:09:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_wait_for_completion [2023-12-02 18:09:30,468 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_wait_for_completion [2023-12-02 18:09:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 18:09:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 18:09:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure update_stats [2023-12-02 18:09:30,468 INFO L138 BoogieDeclarations]: Found implementation of procedure update_stats [2023-12-02 18:09:30,468 INFO L130 BoogieDeclarations]: Found specification of procedure dev_err [2023-12-02 18:09:30,469 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_err [2023-12-02 18:09:30,469 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_warn [2023-12-02 18:09:30,469 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_warn [2023-12-02 18:09:30,469 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2023-12-02 18:09:30,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2023-12-02 18:09:30,469 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-12-02 18:09:30,469 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-12-02 18:09:30,470 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2023-12-02 18:09:30,470 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2023-12-02 18:09:30,470 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2023-12-02 18:09:30,470 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2023-12-02 18:09:30,470 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2023-12-02 18:09:30,470 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2023-12-02 18:09:30,470 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-12-02 18:09:30,471 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-12-02 18:09:30,471 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2023-12-02 18:09:30,471 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2023-12-02 18:09:30,471 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_info [2023-12-02 18:09:30,471 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_info [2023-12-02 18:09:30,471 INFO L130 BoogieDeclarations]: Found specification of procedure pop_tx_status [2023-12-02 18:09:30,471 INFO L138 BoogieDeclarations]: Found implementation of procedure pop_tx_status [2023-12-02 18:09:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:09:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2023-12-02 18:09:30,472 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2023-12-02 18:09:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:09:30,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:09:30,472 INFO L130 BoogieDeclarations]: Found specification of procedure el3_tx_timeout [2023-12-02 18:09:30,472 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_tx_timeout [2023-12-02 18:09:30,904 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:09:30,907 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:09:31,615 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-12-02 18:09:37,457 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:09:38,323 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:09:38,324 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 18:09:38,326 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:09:38 BoogieIcfgContainer [2023-12-02 18:09:38,326 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:09:38,328 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:09:38,329 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:09:38,332 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:09:38,332 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:09:28" (1/3) ... [2023-12-02 18:09:38,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21190b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:09:38, skipping insertion in model container [2023-12-02 18:09:38,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:09:29" (2/3) ... [2023-12-02 18:09:38,333 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21190b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:09:38, skipping insertion in model container [2023-12-02 18:09:38,333 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:09:38" (3/3) ... [2023-12-02 18:09:38,335 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2023-12-02 18:09:38,356 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:09:38,356 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 18:09:38,426 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:09:38,433 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;@171bb1d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:09:38,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 18:09:38,442 INFO L276 IsEmpty]: Start isEmpty. Operand has 784 states, 464 states have (on average 1.3706896551724137) internal successors, (636), 502 states have internal predecessors, (636), 269 states have call successors, (269), 50 states have call predecessors, (269), 49 states have return successors, (263), 254 states have call predecessors, (263), 263 states have call successors, (263) [2023-12-02 18:09:38,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-12-02 18:09:38,479 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:09:38,479 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:09:38,480 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:09:38,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:09:38,485 INFO L85 PathProgramCache]: Analyzing trace with hash 218706828, now seen corresponding path program 1 times [2023-12-02 18:09:38,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:09:38,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83370059] [2023-12-02 18:09:38,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:09:38,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:09:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:09:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-12-02 18:09:39,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:09:39,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83370059] [2023-12-02 18:09:39,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83370059] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:09:39,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:09:39,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:09:39,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383029321] [2023-12-02 18:09:39,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:09:39,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:09:39,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:09:39,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:09:39,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:09:39,925 INFO L87 Difference]: Start difference. First operand has 784 states, 464 states have (on average 1.3706896551724137) internal successors, (636), 502 states have internal predecessors, (636), 269 states have call successors, (269), 50 states have call predecessors, (269), 49 states have return successors, (263), 254 states have call predecessors, (263), 263 states have call successors, (263) Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:09:41,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:09:43,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:09:46,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:09:49,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:09:51,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:09:54,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:09:56,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:09:58,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:09:59,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:09:59,100 INFO L93 Difference]: Finished difference Result 3093 states and 4633 transitions. [2023-12-02 18:09:59,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:09:59,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 149 [2023-12-02 18:09:59,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:09:59,140 INFO L225 Difference]: With dead ends: 3093 [2023-12-02 18:09:59,140 INFO L226 Difference]: Without dead ends: 2285 [2023-12-02 18:09:59,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:09:59,156 INFO L413 NwaCegarLoop]: 1057 mSDtfsCounter, 2904 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 520 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2904 SdHoareTripleChecker+Valid, 2585 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:09:59,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2904 Valid, 2585 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 905 Invalid, 8 Unknown, 0 Unchecked, 18.8s Time] [2023-12-02 18:09:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2023-12-02 18:09:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2273. [2023-12-02 18:09:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2273 states, 1359 states have (on average 1.3495217071376011) internal successors, (1834), 1443 states have internal predecessors, (1834), 771 states have call successors, (771), 143 states have call predecessors, (771), 142 states have return successors, (770), 745 states have call predecessors, (770), 770 states have call successors, (770) [2023-12-02 18:09:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2273 states to 2273 states and 3375 transitions. [2023-12-02 18:09:59,444 INFO L78 Accepts]: Start accepts. Automaton has 2273 states and 3375 transitions. Word has length 149 [2023-12-02 18:09:59,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:09:59,445 INFO L495 AbstractCegarLoop]: Abstraction has 2273 states and 3375 transitions. [2023-12-02 18:09:59,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:09:59,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2273 states and 3375 transitions. [2023-12-02 18:09:59,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-12-02 18:09:59,457 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:09:59,457 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:09:59,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:09:59,458 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:09:59,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:09:59,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1249330588, now seen corresponding path program 1 times [2023-12-02 18:09:59,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:09:59,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634528929] [2023-12-02 18:09:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:09:59,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:09:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-12-02 18:10:00,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:00,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634528929] [2023-12-02 18:10:00,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634528929] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:00,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:10:00,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:10:00,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286387214] [2023-12-02 18:10:00,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:00,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:10:00,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:00,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:10:00,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:10:00,406 INFO L87 Difference]: Start difference. First operand 2273 states and 3375 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:10:02,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:04,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:06,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:09,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:11,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:13,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:15,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:17,598 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 [] [2023-12-02 18:10:19,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:19,339 INFO L93 Difference]: Finished difference Result 9048 states and 13434 transitions. [2023-12-02 18:10:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:10:19,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 151 [2023-12-02 18:10:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:19,383 INFO L225 Difference]: With dead ends: 9048 [2023-12-02 18:10:19,384 INFO L226 Difference]: Without dead ends: 6787 [2023-12-02 18:10:19,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:10:19,395 INFO L413 NwaCegarLoop]: 1025 mSDtfsCounter, 2246 mSDsluCounter, 2486 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 6 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2246 SdHoareTripleChecker+Valid, 3511 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:19,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2246 Valid, 3511 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1012 Invalid, 8 Unknown, 0 Unchecked, 18.5s Time] [2023-12-02 18:10:19,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6787 states. [2023-12-02 18:10:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6787 to 6775. [2023-12-02 18:10:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6775 states, 4059 states have (on average 1.3486080315348608) internal successors, (5474), 4301 states have internal predecessors, (5474), 2291 states have call successors, (2291), 425 states have call predecessors, (2291), 424 states have return successors, (2290), 2221 states have call predecessors, (2290), 2290 states have call successors, (2290) [2023-12-02 18:10:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6775 states to 6775 states and 10055 transitions. [2023-12-02 18:10:19,800 INFO L78 Accepts]: Start accepts. Automaton has 6775 states and 10055 transitions. Word has length 151 [2023-12-02 18:10:19,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:19,801 INFO L495 AbstractCegarLoop]: Abstraction has 6775 states and 10055 transitions. [2023-12-02 18:10:19,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:10:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 6775 states and 10055 transitions. [2023-12-02 18:10:19,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-12-02 18:10:19,806 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:19,806 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:10:19,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:10:19,807 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:10:19,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:19,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1289822161, now seen corresponding path program 1 times [2023-12-02 18:10:19,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:19,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958610115] [2023-12-02 18:10:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:19,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-12-02 18:10:20,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:20,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958610115] [2023-12-02 18:10:20,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958610115] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:20,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:10:20,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:10:20,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219518070] [2023-12-02 18:10:20,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:20,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:10:20,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:20,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:10:20,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:10:20,423 INFO L87 Difference]: Start difference. First operand 6775 states and 10055 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:10:22,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:24,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:26,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:30,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:32,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:34,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:36,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:38,249 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 [] [2023-12-02 18:10:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:10:39,866 INFO L93 Difference]: Finished difference Result 27044 states and 40130 transitions. [2023-12-02 18:10:39,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:10:39,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 152 [2023-12-02 18:10:39,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:10:39,991 INFO L225 Difference]: With dead ends: 27044 [2023-12-02 18:10:39,992 INFO L226 Difference]: Without dead ends: 20281 [2023-12-02 18:10:40,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:10:40,025 INFO L413 NwaCegarLoop]: 1026 mSDtfsCounter, 2838 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 514 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2838 SdHoareTripleChecker+Valid, 2521 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:10:40,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2838 Valid, 2521 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 892 Invalid, 8 Unknown, 0 Unchecked, 18.7s Time] [2023-12-02 18:10:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20281 states. [2023-12-02 18:10:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20281 to 20251. [2023-12-02 18:10:41,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20251 states, 12141 states have (on average 1.3461823573017049) internal successors, (16344), 12845 states have internal predecessors, (16344), 6839 states have call successors, (6839), 1271 states have call predecessors, (6839), 1270 states have return successors, (6838), 6649 states have call predecessors, (6838), 6838 states have call successors, (6838) [2023-12-02 18:10:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20251 states to 20251 states and 30021 transitions. [2023-12-02 18:10:41,683 INFO L78 Accepts]: Start accepts. Automaton has 20251 states and 30021 transitions. Word has length 152 [2023-12-02 18:10:41,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:10:41,684 INFO L495 AbstractCegarLoop]: Abstraction has 20251 states and 30021 transitions. [2023-12-02 18:10:41,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:10:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 20251 states and 30021 transitions. [2023-12-02 18:10:41,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-12-02 18:10:41,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:10:41,691 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:10:41,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:10:41,691 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:10:41,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:10:41,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1112659655, now seen corresponding path program 1 times [2023-12-02 18:10:41,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:10:41,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968254817] [2023-12-02 18:10:41,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:10:41,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:10:42,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:10:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2023-12-02 18:10:42,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:10:42,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968254817] [2023-12-02 18:10:42,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968254817] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:10:42,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:10:42,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:10:42,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384619757] [2023-12-02 18:10:42,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:10:42,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:10:42,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:10:42,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:10:42,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:10:42,498 INFO L87 Difference]: Start difference. First operand 20251 states and 30021 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:10:44,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:46,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:48,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:51,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:53,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:55,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:57,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:10:59,511 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 [] [2023-12-02 18:11:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:11:02,348 INFO L93 Difference]: Finished difference Result 77520 states and 114722 transitions. [2023-12-02 18:11:02,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:11:02,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 150 [2023-12-02 18:11:02,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:11:02,647 INFO L225 Difference]: With dead ends: 77520 [2023-12-02 18:11:02,647 INFO L226 Difference]: Without dead ends: 57281 [2023-12-02 18:11:02,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:11:02,741 INFO L413 NwaCegarLoop]: 1029 mSDtfsCounter, 2247 mSDsluCounter, 2114 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 6 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2247 SdHoareTripleChecker+Valid, 3143 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:11:02,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2247 Valid, 3143 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 952 Invalid, 8 Unknown, 0 Unchecked, 18.0s Time] [2023-12-02 18:11:02,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57281 states. [2023-12-02 18:11:06,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57281 to 57269. [2023-12-02 18:11:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57269 states, 34389 states have (on average 1.345721015440984) internal successors, (46278), 36203 states have internal predecessors, (46278), 19183 states have call successors, (19183), 3697 states have call predecessors, (19183), 3696 states have return successors, (19182), 18701 states have call predecessors, (19182), 19182 states have call successors, (19182) [2023-12-02 18:11:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57269 states to 57269 states and 84643 transitions. [2023-12-02 18:11:06,374 INFO L78 Accepts]: Start accepts. Automaton has 57269 states and 84643 transitions. Word has length 150 [2023-12-02 18:11:06,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:11:06,375 INFO L495 AbstractCegarLoop]: Abstraction has 57269 states and 84643 transitions. [2023-12-02 18:11:06,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2023-12-02 18:11:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand 57269 states and 84643 transitions. [2023-12-02 18:11:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2023-12-02 18:11:06,444 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:11:06,444 INFO L195 NwaCegarLoop]: trace histogram [20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:11:06,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 18:11:06,444 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:11:06,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:11:06,445 INFO L85 PathProgramCache]: Analyzing trace with hash -551341188, now seen corresponding path program 1 times [2023-12-02 18:11:06,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:11:06,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834513328] [2023-12-02 18:11:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:11:06,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:11:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:11:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2023-12-02 18:11:07,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:11:07,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834513328] [2023-12-02 18:11:07,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834513328] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:11:07,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:11:07,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:11:07,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343978053] [2023-12-02 18:11:07,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:11:07,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:11:07,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:11:07,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:11:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:11:07,134 INFO L87 Difference]: Start difference. First operand 57269 states and 84643 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2023-12-02 18:11:09,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:11:11,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:11:13,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:11:15,348 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 [] [2023-12-02 18:11:19,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:11:19,841 INFO L93 Difference]: Finished difference Result 150983 states and 222102 transitions. [2023-12-02 18:11:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:11:19,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) Word has length 282 [2023-12-02 18:11:19,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:11:20,221 INFO L225 Difference]: With dead ends: 150983 [2023-12-02 18:11:20,221 INFO L226 Difference]: Without dead ends: 93726 [2023-12-02 18:11:20,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:11:20,350 INFO L413 NwaCegarLoop]: 1391 mSDtfsCounter, 764 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 2323 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:11:20,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [764 Valid, 2323 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 363 Invalid, 4 Unknown, 0 Unchecked, 9.1s Time] [2023-12-02 18:11:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93726 states. [2023-12-02 18:11:25,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93726 to 93399. [2023-12-02 18:11:25,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93399 states, 56244 states have (on average 1.3436633240879028) internal successors, (75573), 59692 states have internal predecessors, (75573), 30749 states have call successors, (30749), 6487 states have call predecessors, (30749), 6405 states have return successors, (30748), 29543 states have call predecessors, (30748), 30748 states have call successors, (30748) [2023-12-02 18:11:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93399 states to 93399 states and 137070 transitions. [2023-12-02 18:11:25,894 INFO L78 Accepts]: Start accepts. Automaton has 93399 states and 137070 transitions. Word has length 282 [2023-12-02 18:11:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:11:25,895 INFO L495 AbstractCegarLoop]: Abstraction has 93399 states and 137070 transitions. [2023-12-02 18:11:25,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (56), 2 states have call predecessors, (56), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2023-12-02 18:11:25,895 INFO L276 IsEmpty]: Start isEmpty. Operand 93399 states and 137070 transitions. [2023-12-02 18:11:26,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2023-12-02 18:11:26,169 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:11:26,170 INFO L195 NwaCegarLoop]: trace histogram [22, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:11:26,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 18:11:26,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:11:26,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:11:26,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2098145368, now seen corresponding path program 1 times [2023-12-02 18:11:26,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:11:26,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265314193] [2023-12-02 18:11:26,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:11:26,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:11:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:11:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 707 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2023-12-02 18:11:27,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:11:27,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265314193] [2023-12-02 18:11:27,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265314193] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:11:27,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:11:27,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:11:27,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236273080] [2023-12-02 18:11:27,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:11:27,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:11:27,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:11:27,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:11:27,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:11:27,034 INFO L87 Difference]: Start difference. First operand 93399 states and 137070 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2023-12-02 18:11:29,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:11:31,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:11:33,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:11:40,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:11:40,158 INFO L93 Difference]: Finished difference Result 260004 states and 381529 transitions. [2023-12-02 18:11:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:11:40,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) Word has length 357 [2023-12-02 18:11:40,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:11:41,077 INFO L225 Difference]: With dead ends: 260004 [2023-12-02 18:11:41,077 INFO L226 Difference]: Without dead ends: 166617 [2023-12-02 18:11:41,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:11:41,356 INFO L413 NwaCegarLoop]: 1494 mSDtfsCounter, 978 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 2487 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:11:41,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [978 Valid, 2487 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 299 Invalid, 3 Unknown, 0 Unchecked, 6.9s Time] [2023-12-02 18:11:41,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166617 states. [2023-12-02 18:11:50,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166617 to 166614. [2023-12-02 18:11:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166614 states, 100014 states have (on average 1.3397124402583638) internal successors, (133990), 106619 states have internal predecessors, (133990), 55162 states have call successors, (55162), 11519 states have call predecessors, (55162), 11437 states have return successors, (55161), 53107 states have call predecessors, (55161), 55161 states have call successors, (55161) [2023-12-02 18:11:51,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166614 states to 166614 states and 244313 transitions. [2023-12-02 18:11:51,480 INFO L78 Accepts]: Start accepts. Automaton has 166614 states and 244313 transitions. Word has length 357 [2023-12-02 18:11:51,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:11:51,480 INFO L495 AbstractCegarLoop]: Abstraction has 166614 states and 244313 transitions. [2023-12-02 18:11:51,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (62), 2 states have call predecessors, (62), 2 states have call successors, (62) [2023-12-02 18:11:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand 166614 states and 244313 transitions. [2023-12-02 18:11:51,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2023-12-02 18:11:51,629 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:11:51,629 INFO L195 NwaCegarLoop]: trace histogram [22, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:11:51,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 18:11:51,630 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:11:51,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:11:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1597473471, now seen corresponding path program 1 times [2023-12-02 18:11:51,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:11:51,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914186069] [2023-12-02 18:11:51,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:11:51,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:11:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:11:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2023-12-02 18:11:52,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:11:52,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914186069] [2023-12-02 18:11:52,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914186069] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:11:52,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:11:52,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:11:52,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557390647] [2023-12-02 18:11:52,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:11:52,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:11:52,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:11:52,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:11:52,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:11:52,924 INFO L87 Difference]: Start difference. First operand 166614 states and 244313 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) [2023-12-02 18:11:54,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:11:56,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:11:59,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:12:01,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:12:09,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:12:09,017 INFO L93 Difference]: Finished difference Result 340255 states and 500102 transitions. [2023-12-02 18:12:09,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:12:09,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) Word has length 379 [2023-12-02 18:12:09,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:12:09,807 INFO L225 Difference]: With dead ends: 340255 [2023-12-02 18:12:09,807 INFO L226 Difference]: Without dead ends: 173661 [2023-12-02 18:12:10,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:12:10,165 INFO L413 NwaCegarLoop]: 1038 mSDtfsCounter, 44 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 2059 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:12:10,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 2059 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 246 Invalid, 4 Unknown, 0 Unchecked, 9.0s Time] [2023-12-02 18:12:10,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173661 states. [2023-12-02 18:12:18,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173661 to 166776. [2023-12-02 18:12:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166776 states, 100176 states have (on average 1.339163072991535) internal successors, (134152), 106781 states have internal predecessors, (134152), 55162 states have call successors, (55162), 11519 states have call predecessors, (55162), 11437 states have return successors, (55161), 53107 states have call predecessors, (55161), 55161 states have call successors, (55161) [2023-12-02 18:12:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166776 states to 166776 states and 244475 transitions. [2023-12-02 18:12:19,889 INFO L78 Accepts]: Start accepts. Automaton has 166776 states and 244475 transitions. Word has length 379 [2023-12-02 18:12:19,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:12:19,890 INFO L495 AbstractCegarLoop]: Abstraction has 166776 states and 244475 transitions. [2023-12-02 18:12:19,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) [2023-12-02 18:12:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 166776 states and 244475 transitions. [2023-12-02 18:12:20,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2023-12-02 18:12:20,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:12:20,042 INFO L195 NwaCegarLoop]: trace histogram [22, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:12:20,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 18:12:20,042 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:12:20,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:12:20,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1592002433, now seen corresponding path program 1 times [2023-12-02 18:12:20,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:12:20,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504270291] [2023-12-02 18:12:20,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:12:20,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:12:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:12:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2023-12-02 18:12:21,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:12:21,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504270291] [2023-12-02 18:12:21,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504270291] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:12:21,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:12:21,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:12:21,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325608453] [2023-12-02 18:12:21,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:12:21,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:12:21,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:12:21,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:12:21,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:12:21,097 INFO L87 Difference]: Start difference. First operand 166776 states and 244475 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) [2023-12-02 18:12:23,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:12:25,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:12:27,176 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:12:29,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:12:36,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:12:36,603 INFO L93 Difference]: Finished difference Result 336934 states and 494432 transitions. [2023-12-02 18:12:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:12:36,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) Word has length 381 [2023-12-02 18:12:36,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:12:37,347 INFO L225 Difference]: With dead ends: 336934 [2023-12-02 18:12:37,347 INFO L226 Difference]: Without dead ends: 170178 [2023-12-02 18:12:37,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 18:12:37,715 INFO L413 NwaCegarLoop]: 1022 mSDtfsCounter, 21 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 6 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 2027 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:12:37,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 2027 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 248 Invalid, 4 Unknown, 0 Unchecked, 8.8s Time] [2023-12-02 18:12:37,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170178 states. [2023-12-02 18:12:46,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170178 to 167748. [2023-12-02 18:12:46,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167748 states, 101148 states have (on average 1.3391070510539012) internal successors, (135448), 107753 states have internal predecessors, (135448), 55162 states have call successors, (55162), 11519 states have call predecessors, (55162), 11437 states have return successors, (55161), 53107 states have call predecessors, (55161), 55161 states have call successors, (55161) [2023-12-02 18:12:47,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167748 states to 167748 states and 245771 transitions. [2023-12-02 18:12:47,459 INFO L78 Accepts]: Start accepts. Automaton has 167748 states and 245771 transitions. Word has length 381 [2023-12-02 18:12:47,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:12:47,459 INFO L495 AbstractCegarLoop]: Abstraction has 167748 states and 245771 transitions. [2023-12-02 18:12:47,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 2 states have call successors, (67), 2 states have call predecessors, (67), 1 states have return successors, (63), 2 states have call predecessors, (63), 2 states have call successors, (63) [2023-12-02 18:12:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 167748 states and 245771 transitions. [2023-12-02 18:12:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2023-12-02 18:12:47,566 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:12:47,566 INFO L195 NwaCegarLoop]: trace histogram [22, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:12:47,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 18:12:47,567 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:12:47,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:12:47,567 INFO L85 PathProgramCache]: Analyzing trace with hash -169510133, now seen corresponding path program 1 times [2023-12-02 18:12:47,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:12:47,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43245150] [2023-12-02 18:12:47,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:12:47,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:12:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:12:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2023-12-02 18:12:48,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:12:48,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43245150] [2023-12-02 18:12:48,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43245150] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:12:48,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967584927] [2023-12-02 18:12:48,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:12:48,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:12:48,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:12:48,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:12:48,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:12:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:12:50,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 4647 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:12:50,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:12:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 777 backedges. 184 proven. 0 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2023-12-02 18:12:50,369 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:12:50,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967584927] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:12:50,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:12:50,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-12-02 18:12:50,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679759663] [2023-12-02 18:12:50,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:12:50,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:12:50,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:12:50,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:12:50,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:12:50,373 INFO L87 Difference]: Start difference. First operand 167748 states and 245771 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 3 states have call successors, (70), 3 states have call predecessors, (70), 3 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) [2023-12-02 18:12:52,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:12:54,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:12:56,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:12:58,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:13:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:13:09,644 INFO L93 Difference]: Finished difference Result 417546 states and 611405 transitions. [2023-12-02 18:13:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:13:09,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 3 states have call successors, (70), 3 states have call predecessors, (70), 3 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) Word has length 386 [2023-12-02 18:13:09,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:13:10,524 INFO L225 Difference]: With dead ends: 417546 [2023-12-02 18:13:10,524 INFO L226 Difference]: Without dead ends: 249818 [2023-12-02 18:13:11,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:13:11,070 INFO L413 NwaCegarLoop]: 1294 mSDtfsCounter, 907 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 35 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 907 SdHoareTripleChecker+Valid, 2201 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:13:11,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [907 Valid, 2201 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 364 Invalid, 4 Unknown, 0 Unchecked, 9.1s Time] [2023-12-02 18:13:11,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249818 states. [2023-12-02 18:13:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249818 to 249491. [2023-12-02 18:13:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249491 states, 151794 states have (on average 1.3339064785169374) internal successors, (202479), 161586 states have internal predecessors, (202479), 80051 states have call successors, (80051), 17808 states have call predecessors, (80051), 17645 states have return successors, (80050), 76872 states have call predecessors, (80050), 80050 states have call successors, (80050) [2023-12-02 18:13:25,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249491 states to 249491 states and 362580 transitions. [2023-12-02 18:13:25,280 INFO L78 Accepts]: Start accepts. Automaton has 249491 states and 362580 transitions. Word has length 386 [2023-12-02 18:13:25,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:13:25,281 INFO L495 AbstractCegarLoop]: Abstraction has 249491 states and 362580 transitions. [2023-12-02 18:13:25,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 3 states have call successors, (70), 3 states have call predecessors, (70), 3 states have return successors, (66), 3 states have call predecessors, (66), 3 states have call successors, (66) [2023-12-02 18:13:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand 249491 states and 362580 transitions. [2023-12-02 18:13:25,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2023-12-02 18:13:25,792 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:13:25,792 INFO L195 NwaCegarLoop]: trace histogram [22, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:13:25,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:13:25,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-12-02 18:13:25,993 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:13:25,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:13:25,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1498942297, now seen corresponding path program 1 times [2023-12-02 18:13:25,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:13:25,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120257881] [2023-12-02 18:13:25,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:13:25,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:13:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:13:26,801 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 778 trivial. 0 not checked. [2023-12-02 18:13:26,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:13:26,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120257881] [2023-12-02 18:13:26,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120257881] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:13:26,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702786868] [2023-12-02 18:13:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:13:26,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:13:26,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:13:26,803 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:13:26,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:13:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:13:28,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 4677 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 18:13:28,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:13:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 234 proven. 0 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2023-12-02 18:13:28,407 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:13:28,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702786868] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:13:28,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:13:28,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-12-02 18:13:28,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748596918] [2023-12-02 18:13:28,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:13:28,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 18:13:28,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:13:28,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 18:13:28,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:13:28,410 INFO L87 Difference]: Start difference. First operand 249491 states and 362580 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2023-12-02 18:13:30,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:13:32,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:13:34,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:13:36,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 18:13:48,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:13:48,050 INFO L93 Difference]: Finished difference Result 500906 states and 728779 transitions. [2023-12-02 18:13:48,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 18:13:48,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) Word has length 400 [2023-12-02 18:13:48,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:13:49,234 INFO L225 Difference]: With dead ends: 500906 [2023-12-02 18:13:49,234 INFO L226 Difference]: Without dead ends: 251435 [2023-12-02 18:13:49,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:13:49,976 INFO L413 NwaCegarLoop]: 1018 mSDtfsCounter, 2 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2031 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:13:49,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 2031 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 251 Invalid, 4 Unknown, 0 Unchecked, 8.7s Time] [2023-12-02 18:13:50,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251435 states. [2023-12-02 18:14:02,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251435 to 250139. [2023-12-02 18:14:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250139 states, 152442 states have (on average 1.3324871098516158) internal successors, (203127), 162234 states have internal predecessors, (203127), 80051 states have call successors, (80051), 17808 states have call predecessors, (80051), 17645 states have return successors, (80050), 76872 states have call predecessors, (80050), 80050 states have call successors, (80050) [2023-12-02 18:14:04,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250139 states to 250139 states and 363228 transitions. [2023-12-02 18:14:04,314 INFO L78 Accepts]: Start accepts. Automaton has 250139 states and 363228 transitions. Word has length 400 [2023-12-02 18:14:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:14:04,315 INFO L495 AbstractCegarLoop]: Abstraction has 250139 states and 363228 transitions. [2023-12-02 18:14:04,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 2 states have call successors, (68), 2 states have call predecessors, (68), 2 states have return successors, (64), 2 states have call predecessors, (64), 2 states have call successors, (64) [2023-12-02 18:14:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 250139 states and 363228 transitions. [2023-12-02 18:14:04,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2023-12-02 18:14:04,474 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:14:04,474 INFO L195 NwaCegarLoop]: trace histogram [22, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:14:04,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:14:04,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-02 18:14:04,675 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 18:14:04,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:14:04,676 INFO L85 PathProgramCache]: Analyzing trace with hash -11020209, now seen corresponding path program 1 times [2023-12-02 18:14:04,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:14:04,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952591755] [2023-12-02 18:14:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:04,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:14:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2023-12-02 18:14:05,898 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:14:05,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952591755] [2023-12-02 18:14:05,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952591755] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:14:05,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391929478] [2023-12-02 18:14:05,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:14:05,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:14:05,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:14:05,900 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:14:05,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7cfc6b80-3e6c-4b04-9fed-68cc731c2770/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:14:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:14:07,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 4710 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 18:14:07,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:14:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 148 proven. 1 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2023-12-02 18:14:07,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:14:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 797 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2023-12-02 18:14:07,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391929478] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:14:07,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2103793957] [2023-12-02 18:14:07,675 INFO L159 IcfgInterpreter]: Started Sifa with 251 locations of interest [2023-12-02 18:14:07,675 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:14:07,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:14:07,683 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:14:07,683 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:21:17,926 WARN L293 SmtUtils]: Spent 5.25s on a formula simplification that was a NOOP. DAG size: 2802 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2023-12-02 18:21:23,823 WARN L293 SmtUtils]: Spent 5.81s on a formula simplification that was a NOOP. DAG size: 2802 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)