./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--ata--pata_legacy.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--ata--pata_legacy.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e74319804788a44b425a319da2259f01d0e1ef47d07a76f79e8b9e33c34fb449 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 00:58:09,159 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 00:58:09,226 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-12 00:58:09,231 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 00:58:09,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 00:58:09,258 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 00:58:09,259 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 00:58:09,260 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 00:58:09,261 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 00:58:09,261 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 00:58:09,262 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 00:58:09,262 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 00:58:09,263 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 00:58:09,264 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 00:58:09,264 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 00:58:09,265 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 00:58:09,265 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 00:58:09,266 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 00:58:09,266 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 00:58:09,270 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 00:58:09,271 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 00:58:09,275 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 00:58:09,276 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 00:58:09,277 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 00:58:09,277 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 00:58:09,278 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 00:58:09,278 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 00:58:09,279 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 00:58:09,279 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 00:58:09,279 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 00:58:09,280 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 00:58:09,280 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 00:58:09,281 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 00:58:09,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:58:09,284 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 00:58:09,284 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 00:58:09,285 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 00:58:09,285 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 00:58:09,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 00:58:09,287 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 00:58:09,287 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 00:58:09,287 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 00:58:09,288 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_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e74319804788a44b425a319da2259f01d0e1ef47d07a76f79e8b9e33c34fb449 [2023-11-12 00:58:09,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 00:58:09,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 00:58:09,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 00:58:09,660 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 00:58:09,661 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 00:58:09,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--ata--pata_legacy.ko-main.cil.out.i [2023-11-12 00:58:12,893 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 00:58:13,544 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 00:58:13,544 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--ata--pata_legacy.ko-main.cil.out.i [2023-11-12 00:58:13,601 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/data/ca8995def/ea0549b287ec41079d200108c4280a63/FLAG8cf32da5f [2023-11-12 00:58:13,616 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/data/ca8995def/ea0549b287ec41079d200108c4280a63 [2023-11-12 00:58:13,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 00:58:13,626 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 00:58:13,631 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 00:58:13,631 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 00:58:13,637 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 00:58:13,637 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:58:13" (1/1) ... [2023-11-12 00:58:13,638 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769aeb65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:13, skipping insertion in model container [2023-11-12 00:58:13,639 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 12:58:13" (1/1) ... [2023-11-12 00:58:13,770 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 00:58:15,263 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_2ad101ce-bc01-4318-aa71-214edb4648a5/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--ata--pata_legacy.ko-main.cil.out.i[186556,186569] [2023-11-12 00:58:15,372 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:58:15,460 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 00:58:15,614 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/home/zakharov/workspace/benchmarks/bench_1/inst/current/envs/linux-3.8-rc1/linux-3.8-rc1/arch/x86/include/asm/paravirt.h"), "i" (825), "i" (12UL)); [4192-4193] [2023-11-12 00:58:15,616 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.save_fl.func), [paravirt_clobber] "i" (1): "memory", "cc"); [4198-4200] [2023-11-12 00:58:15,618 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/home/zakharov/workspace/benchmarks/bench_1/inst/current/envs/linux-3.8-rc1/linux-3.8-rc1/arch/x86/include/asm/paravirt.h"), "i" (830), "i" (12UL)); [4221-4222] [2023-11-12 00:58:15,618 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" (46UL), [paravirt_opptr] "i" (& pv_irq_ops.restore_fl.func), [paravirt_clobber] "i" (1), "D" (f): "memory", "cc"); [4227-4229] [2023-11-12 00:58:15,619 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("1:\tud2\n.pushsection __bug_table,\"a\"\n2:\t.long 1b - 2b, %c0 - 2b\n\t.word %c1, 0\n\t.org 2b+%c2\n.popsection": : "i" ((char *)"/home/zakharov/workspace/benchmarks/bench_1/inst/current/envs/linux-3.8-rc1/linux-3.8-rc1/arch/x86/include/asm/paravirt.h"), "i" (835), "i" (12UL)); [4249-4250] [2023-11-12 00:58:15,620 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" (47UL), [paravirt_opptr] "i" (& pv_irq_ops.irq_disable.func), [paravirt_clobber] "i" (1): "memory", "cc"); [4255-4257] [2023-11-12 00:58:15,628 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [4353] [2023-11-12 00:58:15,629 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [4360] [2023-11-12 00:58:15,811 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_2ad101ce-bc01-4318-aa71-214edb4648a5/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--ata--pata_legacy.ko-main.cil.out.i[186556,186569] [2023-11-12 00:58:15,832 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 00:58:16,033 INFO L206 MainTranslator]: Completed translation [2023-11-12 00:58:16,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:16 WrapperNode [2023-11-12 00:58:16,035 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 00:58:16,036 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 00:58:16,037 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 00:58:16,037 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 00:58:16,045 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:16" (1/1) ... [2023-11-12 00:58:16,154 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:16" (1/1) ... [2023-11-12 00:58:16,347 INFO L138 Inliner]: procedures = 160, calls = 1667, calls flagged for inlining = 56, calls inlined = 48, statements flattened = 3664 [2023-11-12 00:58:16,348 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 00:58:16,349 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 00:58:16,349 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 00:58:16,349 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 00:58:16,359 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:16" (1/1) ... [2023-11-12 00:58:16,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:16" (1/1) ... [2023-11-12 00:58:16,402 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:16" (1/1) ... [2023-11-12 00:58:16,403 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:16" (1/1) ... [2023-11-12 00:58:16,596 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:16" (1/1) ... [2023-11-12 00:58:16,625 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:16" (1/1) ... [2023-11-12 00:58:16,656 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:16" (1/1) ... [2023-11-12 00:58:16,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:16" (1/1) ... [2023-11-12 00:58:16,713 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 00:58:16,714 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 00:58:16,715 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 00:58:16,715 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 00:58:16,716 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:16" (1/1) ... [2023-11-12 00:58:16,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 00:58:16,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:58:16,761 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 00:58:16,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 00:58:16,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-12 00:58:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-12 00:58:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-12 00:58:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure qdi_qc_issue [2023-11-12 00:58:16,811 INFO L138 BoogieDeclarations]: Found implementation of procedure qdi_qc_issue [2023-11-12 00:58:16,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 00:58:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-12 00:58:16,812 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-12 00:58:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-12 00:58:16,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-12 00:58:16,812 INFO L130 BoogieDeclarations]: Found specification of procedure devm_ioport_map [2023-11-12 00:58:16,812 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_ioport_map [2023-11-12 00:58:16,813 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2023-11-12 00:58:16,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2023-11-12 00:58:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure ata_host_detach [2023-11-12 00:58:16,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_host_detach [2023-11-12 00:58:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_on [2023-11-12 00:58:16,814 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_on [2023-11-12 00:58:16,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 00:58:16,815 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2023-11-12 00:58:16,816 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2023-11-12 00:58:16,816 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-12 00:58:16,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-12 00:58:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure winbond_writecfg [2023-11-12 00:58:16,817 INFO L138 BoogieDeclarations]: Found implementation of procedure winbond_writecfg [2023-11-12 00:58:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-12 00:58:16,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-12 00:58:16,817 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite8 [2023-11-12 00:58:16,817 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite8 [2023-11-12 00:58:16,818 INFO L130 BoogieDeclarations]: Found specification of procedure opti82c46x_set_piomode [2023-11-12 00:58:16,818 INFO L138 BoogieDeclarations]: Found implementation of procedure opti82c46x_set_piomode [2023-11-12 00:58:16,819 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2023-11-12 00:58:16,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2023-11-12 00:58:16,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-12 00:58:16,819 INFO L130 BoogieDeclarations]: Found specification of procedure __devm_request_region [2023-11-12 00:58:16,819 INFO L138 BoogieDeclarations]: Found implementation of procedure __devm_request_region [2023-11-12 00:58:16,819 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_save [2023-11-12 00:58:16,819 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_save [2023-11-12 00:58:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-12 00:58:16,820 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-12 00:58:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 00:58:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32_rep [2023-11-12 00:58:16,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32_rep [2023-11-12 00:58:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure qdi65x0_set_piomode [2023-11-12 00:58:16,820 INFO L138 BoogieDeclarations]: Found implementation of procedure qdi65x0_set_piomode [2023-11-12 00:58:16,820 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-12 00:58:16,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-12 00:58:16,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-12 00:58:16,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-12 00:58:16,821 INFO L130 BoogieDeclarations]: Found specification of procedure ioread16 [2023-11-12 00:58:16,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread16 [2023-11-12 00:58:16,821 INFO L130 BoogieDeclarations]: Found specification of procedure legacy_probe_add [2023-11-12 00:58:16,822 INFO L138 BoogieDeclarations]: Found implementation of procedure legacy_probe_add [2023-11-12 00:58:16,822 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2023-11-12 00:58:16,822 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2023-11-12 00:58:16,822 INFO L130 BoogieDeclarations]: Found specification of procedure vlb32_data_xfer [2023-11-12 00:58:16,823 INFO L138 BoogieDeclarations]: Found implementation of procedure vlb32_data_xfer [2023-11-12 00:58:16,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-12 00:58:16,824 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2023-11-12 00:58:16,824 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2023-11-12 00:58:16,824 INFO L130 BoogieDeclarations]: Found specification of procedure arch_irqs_disabled_flags [2023-11-12 00:58:16,824 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_irqs_disabled_flags [2023-11-12 00:58:16,825 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_unregister [2023-11-12 00:58:16,825 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_unregister [2023-11-12 00:58:16,825 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-12 00:58:16,825 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-12 00:58:16,825 INFO L130 BoogieDeclarations]: Found specification of procedure ioread8 [2023-11-12 00:58:16,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread8 [2023-11-12 00:58:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure ata_timing_merge [2023-11-12 00:58:16,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_timing_merge [2023-11-12 00:58:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure ata_sff_qc_issue [2023-11-12 00:58:16,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_sff_qc_issue [2023-11-12 00:58:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-12 00:58:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-12 00:58:16,826 INFO L130 BoogieDeclarations]: Found specification of procedure winbond_readcfg [2023-11-12 00:58:16,827 INFO L138 BoogieDeclarations]: Found implementation of procedure winbond_readcfg [2023-11-12 00:58:16,827 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-12 00:58:16,827 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-12 00:58:16,827 INFO L130 BoogieDeclarations]: Found specification of procedure ata_dev_next [2023-11-12 00:58:16,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_dev_next [2023-11-12 00:58:16,828 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-12 00:58:16,828 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-12 00:58:16,828 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-11-12 00:58:16,828 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-11-12 00:58:16,828 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32_rep [2023-11-12 00:58:16,829 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32_rep [2023-11-12 00:58:16,829 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-11-12 00:58:16,829 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-11-12 00:58:16,829 INFO L130 BoogieDeclarations]: Found specification of procedure ata_dev_pair [2023-11-12 00:58:16,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_dev_pair [2023-11-12 00:58:16,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 00:58:16,829 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2023-11-12 00:58:16,829 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2023-11-12 00:58:16,830 INFO L130 BoogieDeclarations]: Found specification of procedure opti_syscfg [2023-11-12 00:58:16,830 INFO L138 BoogieDeclarations]: Found implementation of procedure opti_syscfg [2023-11-12 00:58:16,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-12 00:58:16,830 INFO L130 BoogieDeclarations]: Found specification of procedure ata_id_has_dword_io [2023-11-12 00:58:16,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_id_has_dword_io [2023-11-12 00:58:16,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 00:58:16,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 00:58:16,830 INFO L130 BoogieDeclarations]: Found specification of procedure ata_timing_compute [2023-11-12 00:58:16,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_timing_compute [2023-11-12 00:58:16,831 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-12 00:58:16,831 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-12 00:58:17,353 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 00:58:17,357 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 00:58:22,065 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L5541: SUMMARY for call arch_local_irq_restore(probe_chip_type_~flags~5#1); srcloc: null [2023-11-12 00:58:22,065 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L5541-1: SUMMARY for call trace_hardirqs_off(); srcloc: null [2023-11-12 00:58:22,065 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L5544-1: SUMMARY for call arch_local_irq_restore(probe_chip_type_~flags~5#1); srcloc: null [2023-11-12 00:58:22,065 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint L5544: SUMMARY for call trace_hardirqs_on(); srcloc: null [2023-11-12 00:58:22,066 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##479: assume 0 != probe_chip_type_~tmp___5~2#1; [2023-11-12 00:58:22,067 INFO L770 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##480: assume !(0 != probe_chip_type_~tmp___5~2#1); [2023-11-12 00:58:22,167 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 00:58:24,682 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 00:58:24,683 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-12 00:58:24,688 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:58:24 BoogieIcfgContainer [2023-11-12 00:58:24,689 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 00:58:24,692 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 00:58:24,692 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 00:58:24,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 00:58:24,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 12:58:13" (1/3) ... [2023-11-12 00:58:24,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac57133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:58:24, skipping insertion in model container [2023-11-12 00:58:24,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 12:58:16" (2/3) ... [2023-11-12 00:58:24,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac57133 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 12:58:24, skipping insertion in model container [2023-11-12 00:58:24,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 12:58:24" (3/3) ... [2023-11-12 00:58:24,701 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--ata--pata_legacy.ko-main.cil.out.i [2023-11-12 00:58:24,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 00:58:24,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 00:58:24,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 00:58:24,812 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;@59e25aa2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 00:58:24,813 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 00:58:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 723 states, 424 states have (on average 1.3443396226415094) internal successors, (570), 444 states have internal predecessors, (570), 253 states have call successors, (253), 44 states have call predecessors, (253), 44 states have return successors, (253), 246 states have call predecessors, (253), 253 states have call successors, (253) [2023-11-12 00:58:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 00:58:24,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:24,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:58:24,845 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:24,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:24,850 INFO L85 PathProgramCache]: Analyzing trace with hash -950531399, now seen corresponding path program 1 times [2023-11-12 00:58:24,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:24,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770937021] [2023-11-12 00:58:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:24,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:25,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:58:25,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:25,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770937021] [2023-11-12 00:58:25,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770937021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:25,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:58:25,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 00:58:25,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530537896] [2023-11-12 00:58:25,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:25,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:58:25,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:25,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:58:25,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:58:25,992 INFO L87 Difference]: Start difference. First operand has 723 states, 424 states have (on average 1.3443396226415094) internal successors, (570), 444 states have internal predecessors, (570), 253 states have call successors, (253), 44 states have call predecessors, (253), 44 states have return successors, (253), 246 states have call predecessors, (253), 253 states have call successors, (253) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:58:28,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:28,824 INFO L93 Difference]: Finished difference Result 1907 states and 2823 transitions. [2023-11-12 00:58:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:58:28,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-12 00:58:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:28,857 INFO L225 Difference]: With dead ends: 1907 [2023-11-12 00:58:28,858 INFO L226 Difference]: Without dead ends: 1177 [2023-11-12 00:58:28,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:58:28,876 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 1034 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:28,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 1530 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-12 00:58:28,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2023-11-12 00:58:29,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1177. [2023-11-12 00:58:29,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 692 states have (on average 1.3323699421965318) internal successors, (922), 719 states have internal predecessors, (922), 404 states have call successors, (404), 81 states have call predecessors, (404), 80 states have return successors, (401), 391 states have call predecessors, (401), 401 states have call successors, (401) [2023-11-12 00:58:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1727 transitions. [2023-11-12 00:58:29,058 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1727 transitions. Word has length 19 [2023-11-12 00:58:29,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:29,059 INFO L495 AbstractCegarLoop]: Abstraction has 1177 states and 1727 transitions. [2023-11-12 00:58:29,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:58:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1727 transitions. [2023-11-12 00:58:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-12 00:58:29,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:29,072 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 00:58:29,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 00:58:29,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:29,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:29,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1404819423, now seen corresponding path program 1 times [2023-11-12 00:58:29,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:29,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490087846] [2023-11-12 00:58:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:29,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 00:58:29,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:29,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490087846] [2023-11-12 00:58:29,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490087846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:29,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:58:29,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:58:29,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398430122] [2023-11-12 00:58:29,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:29,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:58:29,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:29,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:58:29,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:58:29,642 INFO L87 Difference]: Start difference. First operand 1177 states and 1727 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:58:33,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-12 00:58:34,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:34,609 INFO L93 Difference]: Finished difference Result 2198 states and 3237 transitions. [2023-11-12 00:58:34,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:58:34,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2023-11-12 00:58:34,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:34,624 INFO L225 Difference]: With dead ends: 2198 [2023-11-12 00:58:34,625 INFO L226 Difference]: Without dead ends: 1394 [2023-11-12 00:58:34,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:58:34,631 INFO L413 NwaCegarLoop]: 1219 mSDtfsCounter, 157 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 2233 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:34,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 2233 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-12 00:58:34,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2023-11-12 00:58:34,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1189. [2023-11-12 00:58:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 701 states have (on average 1.332382310984308) internal successors, (934), 728 states have internal predecessors, (934), 407 states have call successors, (407), 81 states have call predecessors, (407), 80 states have return successors, (404), 394 states have call predecessors, (404), 404 states have call successors, (404) [2023-11-12 00:58:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1745 transitions. [2023-11-12 00:58:34,753 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1745 transitions. Word has length 36 [2023-11-12 00:58:34,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:34,754 INFO L495 AbstractCegarLoop]: Abstraction has 1189 states and 1745 transitions. [2023-11-12 00:58:34,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:58:34,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1745 transitions. [2023-11-12 00:58:34,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-12 00:58:34,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:34,760 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 00:58:34,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 00:58:34,761 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:34,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:34,762 INFO L85 PathProgramCache]: Analyzing trace with hash -771195885, now seen corresponding path program 1 times [2023-11-12 00:58:34,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:34,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510039045] [2023-11-12 00:58:34,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:34,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:58:35,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:35,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510039045] [2023-11-12 00:58:35,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510039045] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:35,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 00:58:35,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 00:58:35,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006501915] [2023-11-12 00:58:35,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:35,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:58:35,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:35,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:58:35,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:58:35,427 INFO L87 Difference]: Start difference. First operand 1189 states and 1745 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:58:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:38,996 INFO L93 Difference]: Finished difference Result 2006 states and 2923 transitions. [2023-11-12 00:58:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:58:38,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2023-11-12 00:58:38,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:39,007 INFO L225 Difference]: With dead ends: 2006 [2023-11-12 00:58:39,007 INFO L226 Difference]: Without dead ends: 1190 [2023-11-12 00:58:39,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 00:58:39,013 INFO L413 NwaCegarLoop]: 931 mSDtfsCounter, 0 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1861 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:39,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1861 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-12 00:58:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2023-11-12 00:58:39,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1190. [2023-11-12 00:58:39,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 702 states have (on average 1.331908831908832) internal successors, (935), 729 states have internal predecessors, (935), 407 states have call successors, (407), 81 states have call predecessors, (407), 80 states have return successors, (404), 394 states have call predecessors, (404), 404 states have call successors, (404) [2023-11-12 00:58:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1746 transitions. [2023-11-12 00:58:39,092 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1746 transitions. Word has length 45 [2023-11-12 00:58:39,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:39,093 INFO L495 AbstractCegarLoop]: Abstraction has 1190 states and 1746 transitions. [2023-11-12 00:58:39,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-12 00:58:39,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1746 transitions. [2023-11-12 00:58:39,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-12 00:58:39,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:39,097 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 00:58:39,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 00:58:39,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:39,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:39,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1692708641, now seen corresponding path program 1 times [2023-11-12 00:58:39,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:39,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839348490] [2023-11-12 00:58:39,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:39,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:39,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-12 00:58:39,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:39,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839348490] [2023-11-12 00:58:39,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839348490] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:58:39,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503006088] [2023-11-12 00:58:39,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:39,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:58:39,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:58:39,845 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:58:39,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 00:58:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:41,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 4276 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 00:58:41,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:58:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-12 00:58:41,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:58:41,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503006088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:41,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:58:41,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-12 00:58:41,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878186365] [2023-11-12 00:58:41,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:41,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:58:41,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:41,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:58:41,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:41,149 INFO L87 Difference]: Start difference. First operand 1190 states and 1746 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:58:44,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:44,305 INFO L93 Difference]: Finished difference Result 2120 states and 3106 transitions. [2023-11-12 00:58:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:58:44,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2023-11-12 00:58:44,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:44,317 INFO L225 Difference]: With dead ends: 2120 [2023-11-12 00:58:44,317 INFO L226 Difference]: Without dead ends: 1303 [2023-11-12 00:58:44,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:44,322 INFO L413 NwaCegarLoop]: 1018 mSDtfsCounter, 83 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:44,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1973 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-12 00:58:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2023-11-12 00:58:44,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1191. [2023-11-12 00:58:44,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 703 states have (on average 1.3314366998577525) internal successors, (936), 730 states have internal predecessors, (936), 407 states have call successors, (407), 81 states have call predecessors, (407), 80 states have return successors, (404), 394 states have call predecessors, (404), 404 states have call successors, (404) [2023-11-12 00:58:44,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1747 transitions. [2023-11-12 00:58:44,473 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1747 transitions. Word has length 46 [2023-11-12 00:58:44,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:44,474 INFO L495 AbstractCegarLoop]: Abstraction has 1191 states and 1747 transitions. [2023-11-12 00:58:44,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:58:44,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1747 transitions. [2023-11-12 00:58:44,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-12 00:58:44,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:44,478 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 00:58:44,497 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 00:58:44,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:58:44,691 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:44,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:44,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1902079018, now seen corresponding path program 1 times [2023-11-12 00:58:44,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:44,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435824746] [2023-11-12 00:58:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:44,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:58:45,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:45,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435824746] [2023-11-12 00:58:45,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435824746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:58:45,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313635422] [2023-11-12 00:58:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:45,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:58:45,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:58:45,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:58:45,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 00:58:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:46,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 4287 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:58:46,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:58:46,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:58:46,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:58:46,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313635422] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:46,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:58:46,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-12 00:58:46,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834893361] [2023-11-12 00:58:46,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:46,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:58:46,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:46,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:58:46,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:46,615 INFO L87 Difference]: Start difference. First operand 1191 states and 1747 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:58:50,082 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 [] [2023-11-12 00:58:51,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:51,013 INFO L93 Difference]: Finished difference Result 1193 states and 1748 transitions. [2023-11-12 00:58:51,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:58:51,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2023-11-12 00:58:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:51,026 INFO L225 Difference]: With dead ends: 1193 [2023-11-12 00:58:51,026 INFO L226 Difference]: Without dead ends: 1190 [2023-11-12 00:58:51,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:51,029 INFO L413 NwaCegarLoop]: 928 mSDtfsCounter, 1023 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:51,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 928 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-11-12 00:58:51,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2023-11-12 00:58:51,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1190. [2023-11-12 00:58:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 703 states have (on average 1.330014224751067) internal successors, (935), 729 states have internal predecessors, (935), 406 states have call successors, (406), 81 states have call predecessors, (406), 80 states have return successors, (404), 394 states have call predecessors, (404), 404 states have call successors, (404) [2023-11-12 00:58:51,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1745 transitions. [2023-11-12 00:58:51,126 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1745 transitions. Word has length 49 [2023-11-12 00:58:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:51,127 INFO L495 AbstractCegarLoop]: Abstraction has 1190 states and 1745 transitions. [2023-11-12 00:58:51,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:58:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1745 transitions. [2023-11-12 00:58:51,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-12 00:58:51,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:51,132 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 00:58:51,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 00:58:51,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:58:51,346 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:51,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:51,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1164624761, now seen corresponding path program 1 times [2023-11-12 00:58:51,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:51,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869723450] [2023-11-12 00:58:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:51,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:51,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:58:51,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:51,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869723450] [2023-11-12 00:58:51,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869723450] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:58:51,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864101749] [2023-11-12 00:58:51,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:51,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:58:51,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:58:51,949 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:58:51,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 00:58:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:53,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 4289 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:58:53,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:58:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:58:53,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:58:53,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864101749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:53,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:58:53,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-12 00:58:53,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324520858] [2023-11-12 00:58:53,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:53,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:58:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:58:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:53,211 INFO L87 Difference]: Start difference. First operand 1190 states and 1745 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:58:54,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:54,701 INFO L93 Difference]: Finished difference Result 1192 states and 1746 transitions. [2023-11-12 00:58:54,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:58:54,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2023-11-12 00:58:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:54,713 INFO L225 Difference]: With dead ends: 1192 [2023-11-12 00:58:54,714 INFO L226 Difference]: Without dead ends: 1189 [2023-11-12 00:58:54,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:54,716 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 1020 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:54,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1020 Valid, 926 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-12 00:58:54,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2023-11-12 00:58:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1189. [2023-11-12 00:58:54,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 703 states have (on average 1.3285917496443813) internal successors, (934), 728 states have internal predecessors, (934), 405 states have call successors, (405), 81 states have call predecessors, (405), 80 states have return successors, (404), 394 states have call predecessors, (404), 404 states have call successors, (404) [2023-11-12 00:58:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1743 transitions. [2023-11-12 00:58:54,840 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1743 transitions. Word has length 50 [2023-11-12 00:58:54,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:54,841 INFO L495 AbstractCegarLoop]: Abstraction has 1189 states and 1743 transitions. [2023-11-12 00:58:54,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 2 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:58:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1743 transitions. [2023-11-12 00:58:54,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-12 00:58:54,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 00:58:54,845 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-12 00:58:54,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 00:58:55,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 00:58:55,059 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 00:58:55,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 00:58:55,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1743166265, now seen corresponding path program 1 times [2023-11-12 00:58:55,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 00:58:55,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906848849] [2023-11-12 00:58:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:55,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 00:58:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 00:58:55,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 00:58:55,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906848849] [2023-11-12 00:58:55,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906848849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 00:58:55,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870537984] [2023-11-12 00:58:55,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 00:58:55,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:58:55,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 00:58:55,734 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 00:58:55,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 00:58:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 00:58:56,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 4291 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 00:58:56,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 00:58:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-12 00:58:56,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 00:58:56,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870537984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 00:58:56,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 00:58:56,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-12 00:58:56,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449255707] [2023-11-12 00:58:56,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 00:58:56,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 00:58:56,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 00:58:56,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 00:58:56,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:56,959 INFO L87 Difference]: Start difference. First operand 1189 states and 1743 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:58:58,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 00:58:58,988 INFO L93 Difference]: Finished difference Result 1189 states and 1743 transitions. [2023-11-12 00:58:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 00:58:58,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-11-12 00:58:58,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 00:58:58,990 INFO L225 Difference]: With dead ends: 1189 [2023-11-12 00:58:58,990 INFO L226 Difference]: Without dead ends: 0 [2023-11-12 00:58:58,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-12 00:58:58,995 INFO L413 NwaCegarLoop]: 924 mSDtfsCounter, 1016 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-12 00:58:58,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 924 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-12 00:58:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-12 00:58:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-12 00:58:58,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-12 00:58:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-12 00:58:58,997 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51 [2023-11-12 00:58:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 00:58:58,997 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-12 00:58:58,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 2 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 00:58:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-12 00:58:58,998 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-12 00:58:59,001 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-12 00:58:59,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 00:58:59,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ad101ce-bc01-4318-aa71-214edb4648a5/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 00:58:59,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.