./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 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/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_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire --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-30e01a7 [2023-11-23 21:19:16,040 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:19:16,164 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:19:16,172 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:19:16,173 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:19:16,211 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:19:16,212 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:19:16,213 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:19:16,214 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:19:16,219 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:19:16,220 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:19:16,220 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:19:16,221 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:19:16,223 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:19:16,223 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:19:16,224 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:19:16,224 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:19:16,225 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:19:16,225 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:19:16,226 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:19:16,226 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:19:16,227 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:19:16,228 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:19:16,229 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:19:16,229 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:19:16,230 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:19:16,230 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:19:16,231 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:19:16,231 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:19:16,232 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:19:16,233 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:19:16,234 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:19:16,234 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:19:16,234 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:19:16,234 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:16,235 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:19:16,235 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:19:16,235 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:19:16,236 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:19:16,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:19:16,236 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:19:16,237 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:19:16,237 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:19:16,237 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:19:16,238 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_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e74319804788a44b425a319da2259f01d0e1ef47d07a76f79e8b9e33c34fb449 [2023-11-23 21:19:16,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:19:16,588 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:19:16,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:19:16,592 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:19:16,593 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:19:16,594 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--ata--pata_legacy.ko-main.cil.out.i [2023-11-23 21:19:19,984 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:19:20,727 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:19:20,728 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--ata--pata_legacy.ko-main.cil.out.i [2023-11-23 21:19:20,850 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/data/5507fa6d6/91476770632e4c27816b99de630a6ac5/FLAG29dd4d6a5 [2023-11-23 21:19:20,868 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/data/5507fa6d6/91476770632e4c27816b99de630a6ac5 [2023-11-23 21:19:20,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:19:20,875 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:19:20,880 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:20,881 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:19:20,888 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:19:20,889 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:20" (1/1) ... [2023-11-23 21:19:20,890 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13574847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:20, skipping insertion in model container [2023-11-23 21:19:20,890 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:20" (1/1) ... [2023-11-23 21:19:21,041 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:19:22,880 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_bb6dfd49-9ff0-414f-b748-396f92b02754/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--ata--pata_legacy.ko-main.cil.out.i[186556,186569] [2023-11-23 21:19:23,011 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:23,122 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:19:23,365 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] [2023-11-23 21:19:23,367 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] [2023-11-23 21:19:23,369 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] [2023-11-23 21:19:23,369 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] [2023-11-23 21:19:23,371 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] [2023-11-23 21:19:23,372 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] [2023-11-23 21:19:23,387 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("outb %b0, %w1": : "a" (value), "Nd" (port)); [4353] [2023-11-23 21:19:23,388 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("inb %w1, %b0": "=a" (value): "Nd" (port)); [4360] [2023-11-23 21:19:23,636 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_bb6dfd49-9ff0-414f-b748-396f92b02754/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--ata--pata_legacy.ko-main.cil.out.i[186556,186569] [2023-11-23 21:19:23,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:23,904 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:19:23,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:23 WrapperNode [2023-11-23 21:19:23,906 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:23,907 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:23,907 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:19:23,908 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:19:23,918 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:23" (1/1) ... [2023-11-23 21:19:24,017 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:23" (1/1) ... [2023-11-23 21:19:24,225 INFO L138 Inliner]: procedures = 160, calls = 1667, calls flagged for inlining = 56, calls inlined = 48, statements flattened = 3664 [2023-11-23 21:19:24,226 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:24,227 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:19:24,227 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:19:24,227 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:19:24,239 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:23" (1/1) ... [2023-11-23 21:19:24,240 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:23" (1/1) ... [2023-11-23 21:19:24,287 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:23" (1/1) ... [2023-11-23 21:19:24,287 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:23" (1/1) ... [2023-11-23 21:19:24,548 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:23" (1/1) ... [2023-11-23 21:19:24,593 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:23" (1/1) ... [2023-11-23 21:19:24,632 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:23" (1/1) ... [2023-11-23 21:19:24,661 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:23" (1/1) ... [2023-11-23 21:19:24,704 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:19:24,707 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:19:24,707 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:19:24,709 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:19:24,710 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:23" (1/1) ... [2023-11-23 21:19:24,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:24,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:24,752 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:19:24,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:19:24,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:19:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:19:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:19:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure qdi_qc_issue [2023-11-23 21:19:24,810 INFO L138 BoogieDeclarations]: Found implementation of procedure qdi_qc_issue [2023-11-23 21:19:24,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:19:24,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:19:24,810 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:19:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:19:24,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:19:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure devm_ioport_map [2023-11-23 21:19:24,812 INFO L138 BoogieDeclarations]: Found implementation of procedure devm_ioport_map [2023-11-23 21:19:24,812 INFO L130 BoogieDeclarations]: Found specification of procedure __release_region [2023-11-23 21:19:24,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __release_region [2023-11-23 21:19:24,813 INFO L130 BoogieDeclarations]: Found specification of procedure ata_host_detach [2023-11-23 21:19:24,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_host_detach [2023-11-23 21:19:24,814 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_on [2023-11-23 21:19:24,815 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_on [2023-11-23 21:19:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:19:24,816 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2023-11-23 21:19:24,816 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2023-11-23 21:19:24,817 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:19:24,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:19:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure winbond_writecfg [2023-11-23 21:19:24,818 INFO L138 BoogieDeclarations]: Found implementation of procedure winbond_writecfg [2023-11-23 21:19:24,818 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:19:24,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:19:24,819 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite8 [2023-11-23 21:19:24,820 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite8 [2023-11-23 21:19:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure opti82c46x_set_piomode [2023-11-23 21:19:24,820 INFO L138 BoogieDeclarations]: Found implementation of procedure opti82c46x_set_piomode [2023-11-23 21:19:24,820 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2023-11-23 21:19:24,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2023-11-23 21:19:24,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:19:24,821 INFO L130 BoogieDeclarations]: Found specification of procedure __devm_request_region [2023-11-23 21:19:24,821 INFO L138 BoogieDeclarations]: Found implementation of procedure __devm_request_region [2023-11-23 21:19:24,822 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_save [2023-11-23 21:19:24,822 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_save [2023-11-23 21:19:24,822 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2023-11-23 21:19:24,822 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2023-11-23 21:19:24,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:19:24,823 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32_rep [2023-11-23 21:19:24,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32_rep [2023-11-23 21:19:24,823 INFO L130 BoogieDeclarations]: Found specification of procedure qdi65x0_set_piomode [2023-11-23 21:19:24,823 INFO L138 BoogieDeclarations]: Found implementation of procedure qdi65x0_set_piomode [2023-11-23 21:19:24,823 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2023-11-23 21:19:24,824 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2023-11-23 21:19:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:19:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:19:24,824 INFO L130 BoogieDeclarations]: Found specification of procedure ioread16 [2023-11-23 21:19:24,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread16 [2023-11-23 21:19:24,825 INFO L130 BoogieDeclarations]: Found specification of procedure legacy_probe_add [2023-11-23 21:19:24,825 INFO L138 BoogieDeclarations]: Found implementation of procedure legacy_probe_add [2023-11-23 21:19:24,826 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2023-11-23 21:19:24,827 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2023-11-23 21:19:24,827 INFO L130 BoogieDeclarations]: Found specification of procedure vlb32_data_xfer [2023-11-23 21:19:24,828 INFO L138 BoogieDeclarations]: Found implementation of procedure vlb32_data_xfer [2023-11-23 21:19:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:19:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2023-11-23 21:19:24,828 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2023-11-23 21:19:24,828 INFO L130 BoogieDeclarations]: Found specification of procedure arch_irqs_disabled_flags [2023-11-23 21:19:24,829 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_irqs_disabled_flags [2023-11-23 21:19:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure platform_device_unregister [2023-11-23 21:19:24,829 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_device_unregister [2023-11-23 21:19:24,829 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2023-11-23 21:19:24,829 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2023-11-23 21:19:24,830 INFO L130 BoogieDeclarations]: Found specification of procedure ioread8 [2023-11-23 21:19:24,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread8 [2023-11-23 21:19:24,830 INFO L130 BoogieDeclarations]: Found specification of procedure ata_timing_merge [2023-11-23 21:19:24,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_timing_merge [2023-11-23 21:19:24,831 INFO L130 BoogieDeclarations]: Found specification of procedure ata_sff_qc_issue [2023-11-23 21:19:24,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_sff_qc_issue [2023-11-23 21:19:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:19:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:19:24,832 INFO L130 BoogieDeclarations]: Found specification of procedure winbond_readcfg [2023-11-23 21:19:24,832 INFO L138 BoogieDeclarations]: Found implementation of procedure winbond_readcfg [2023-11-23 21:19:24,833 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:19:24,833 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:19:24,834 INFO L130 BoogieDeclarations]: Found specification of procedure ata_dev_next [2023-11-23 21:19:24,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_dev_next [2023-11-23 21:19:24,834 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2023-11-23 21:19:24,834 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2023-11-23 21:19:24,835 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2023-11-23 21:19:24,835 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2023-11-23 21:19:24,835 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32_rep [2023-11-23 21:19:24,835 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32_rep [2023-11-23 21:19:24,835 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2023-11-23 21:19:24,836 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2023-11-23 21:19:24,836 INFO L130 BoogieDeclarations]: Found specification of procedure ata_dev_pair [2023-11-23 21:19:24,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_dev_pair [2023-11-23 21:19:24,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:19:24,836 INFO L130 BoogieDeclarations]: Found specification of procedure __request_region [2023-11-23 21:19:24,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_region [2023-11-23 21:19:24,837 INFO L130 BoogieDeclarations]: Found specification of procedure opti_syscfg [2023-11-23 21:19:24,837 INFO L138 BoogieDeclarations]: Found implementation of procedure opti_syscfg [2023-11-23 21:19:24,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:19:24,837 INFO L130 BoogieDeclarations]: Found specification of procedure ata_id_has_dword_io [2023-11-23 21:19:24,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_id_has_dword_io [2023-11-23 21:19:24,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:19:24,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:19:24,838 INFO L130 BoogieDeclarations]: Found specification of procedure ata_timing_compute [2023-11-23 21:19:24,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ata_timing_compute [2023-11-23 21:19:24,839 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 21:19:24,839 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 21:19:25,495 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:19:25,499 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:19:30,676 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint L5541: SUMMARY for call arch_local_irq_restore(probe_chip_type_~flags~5#1); srcloc: null [2023-11-23 21:19:30,676 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint L5541-1: SUMMARY for call trace_hardirqs_off(); srcloc: null [2023-11-23 21:19:30,676 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint L5544-1: SUMMARY for call arch_local_irq_restore(probe_chip_type_~flags~5#1); srcloc: null [2023-11-23 21:19:30,677 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint L5544: SUMMARY for call trace_hardirqs_on(); srcloc: null [2023-11-23 21:19:30,678 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##479: assume 0 != probe_chip_type_~tmp___5~2#1; [2023-11-23 21:19:30,678 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##480: assume !(0 != probe_chip_type_~tmp___5~2#1); [2023-11-23 21:19:30,767 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:19:32,987 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:19:32,987 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:19:32,989 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:32 BoogieIcfgContainer [2023-11-23 21:19:32,989 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:19:32,992 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:19:32,992 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:19:32,995 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:19:32,996 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:19:20" (1/3) ... [2023-11-23 21:19:32,998 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f794426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:32, skipping insertion in model container [2023-11-23 21:19:32,999 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:23" (2/3) ... [2023-11-23 21:19:33,000 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f794426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:32, skipping insertion in model container [2023-11-23 21:19:33,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:32" (3/3) ... [2023-11-23 21:19:33,002 INFO L112 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--ata--pata_legacy.ko-main.cil.out.i [2023-11-23 21:19:33,024 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:19:33,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:19:33,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:19:33,125 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;@44bd7f74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:19:33,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:19:33,136 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) [2023-11-23 21:19:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 21:19:33,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:33,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:19:33,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:33,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:33,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1923186112, now seen corresponding path program 1 times [2023-11-23 21:19:33,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:33,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464669615] [2023-11-23 21:19:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:33,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:19:34,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:34,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464669615] [2023-11-23 21:19:34,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464669615] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:34,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:34,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:19:34,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465840647] [2023-11-23 21:19:34,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:34,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:34,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:34,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:34,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:34,442 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) [2023-11-23 21:19:36,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:36,834 INFO L93 Difference]: Finished difference Result 1907 states and 2823 transitions. [2023-11-23 21:19:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:36,837 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 [2023-11-23 21:19:36,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:36,875 INFO L225 Difference]: With dead ends: 1907 [2023-11-23 21:19:36,875 INFO L226 Difference]: Without dead ends: 1177 [2023-11-23 21:19:36,888 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 [2023-11-23 21:19:36,894 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 1034 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s 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, 2.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:36,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 1530 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-23 21:19:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2023-11-23 21:19:37,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1177. [2023-11-23 21:19:37,106 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) [2023-11-23 21:19:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1727 transitions. [2023-11-23 21:19:37,120 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1727 transitions. Word has length 19 [2023-11-23 21:19:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:37,121 INFO L495 AbstractCegarLoop]: Abstraction has 1177 states and 1727 transitions. [2023-11-23 21:19:37,121 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) [2023-11-23 21:19:37,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1727 transitions. [2023-11-23 21:19:37,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 21:19:37,129 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:37,129 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] [2023-11-23 21:19:37,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:19:37,134 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:37,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:37,135 INFO L85 PathProgramCache]: Analyzing trace with hash -2045588727, now seen corresponding path program 1 times [2023-11-23 21:19:37,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:37,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005828151] [2023-11-23 21:19:37,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:37,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:19:37,779 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:37,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005828151] [2023-11-23 21:19:37,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005828151] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:37,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:37,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:19:37,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877766192] [2023-11-23 21:19:37,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:37,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:37,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:37,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:37,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:37,785 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) [2023-11-23 21:19:40,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:40,855 INFO L93 Difference]: Finished difference Result 2198 states and 3237 transitions. [2023-11-23 21:19:40,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:40,856 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 [2023-11-23 21:19:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:40,868 INFO L225 Difference]: With dead ends: 2198 [2023-11-23 21:19:40,868 INFO L226 Difference]: Without dead ends: 1394 [2023-11-23 21:19:40,872 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 [2023-11-23 21:19:40,874 INFO L413 NwaCegarLoop]: 1219 mSDtfsCounter, 157 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s 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, 3.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:40,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 2233 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-23 21:19:40,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2023-11-23 21:19:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1189. [2023-11-23 21:19:40,985 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) [2023-11-23 21:19:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1745 transitions. [2023-11-23 21:19:40,998 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1745 transitions. Word has length 36 [2023-11-23 21:19:40,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:40,998 INFO L495 AbstractCegarLoop]: Abstraction has 1189 states and 1745 transitions. [2023-11-23 21:19:40,999 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) [2023-11-23 21:19:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1745 transitions. [2023-11-23 21:19:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 21:19:41,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:41,004 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] [2023-11-23 21:19:41,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:19:41,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:41,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:41,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1618928823, now seen corresponding path program 1 times [2023-11-23 21:19:41,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:41,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015226539] [2023-11-23 21:19:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:41,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:19:41,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:41,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015226539] [2023-11-23 21:19:41,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015226539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:41,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:41,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:19:41,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669461218] [2023-11-23 21:19:41,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:41,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:41,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:41,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:41,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:41,741 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) [2023-11-23 21:19:44,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:44,883 INFO L93 Difference]: Finished difference Result 2006 states and 2923 transitions. [2023-11-23 21:19:44,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:44,884 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 [2023-11-23 21:19:44,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:44,896 INFO L225 Difference]: With dead ends: 2006 [2023-11-23 21:19:44,896 INFO L226 Difference]: Without dead ends: 1190 [2023-11-23 21:19:44,900 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 [2023-11-23 21:19:44,902 INFO L413 NwaCegarLoop]: 931 mSDtfsCounter, 0 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s 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, 3.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:44,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1861 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-23 21:19:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2023-11-23 21:19:44,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1190. [2023-11-23 21:19:45,000 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) [2023-11-23 21:19:45,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1746 transitions. [2023-11-23 21:19:45,017 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1746 transitions. Word has length 45 [2023-11-23 21:19:45,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:45,018 INFO L495 AbstractCegarLoop]: Abstraction has 1190 states and 1746 transitions. [2023-11-23 21:19:45,018 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) [2023-11-23 21:19:45,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1746 transitions. [2023-11-23 21:19:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:19:45,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:45,028 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] [2023-11-23 21:19:45,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:19:45,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:45,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:45,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1425877331, now seen corresponding path program 1 times [2023-11-23 21:19:45,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:45,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819872157] [2023-11-23 21:19:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:45,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:19:45,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:45,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819872157] [2023-11-23 21:19:45,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819872157] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:45,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569566432] [2023-11-23 21:19:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:45,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:45,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:45,804 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:45,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:19:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:46,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 4274 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:19:46,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-23 21:19:47,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:19:47,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569566432] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:47,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:19:47,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-23 21:19:47,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603195395] [2023-11-23 21:19:47,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:47,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:47,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:47,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:47,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:19:47,070 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) [2023-11-23 21:19:50,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:50,717 INFO L93 Difference]: Finished difference Result 2120 states and 3106 transitions. [2023-11-23 21:19:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:50,718 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 [2023-11-23 21:19:50,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:50,728 INFO L225 Difference]: With dead ends: 2120 [2023-11-23 21:19:50,728 INFO L226 Difference]: Without dead ends: 1303 [2023-11-23 21:19:50,732 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 [2023-11-23 21:19:50,733 INFO L413 NwaCegarLoop]: 993 mSDtfsCounter, 83 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1940 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:50,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1940 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-23 21:19:50,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2023-11-23 21:19:50,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1191. [2023-11-23 21:19:50,812 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) [2023-11-23 21:19:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1747 transitions. [2023-11-23 21:19:50,824 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1747 transitions. Word has length 46 [2023-11-23 21:19:50,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:50,825 INFO L495 AbstractCegarLoop]: Abstraction has 1191 states and 1747 transitions. [2023-11-23 21:19:50,825 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) [2023-11-23 21:19:50,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1747 transitions. [2023-11-23 21:19:50,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-23 21:19:50,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:50,829 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] [2023-11-23 21:19:50,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 21:19:51,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:51,054 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:51,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:51,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1434549643, now seen corresponding path program 1 times [2023-11-23 21:19:51,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:51,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740504035] [2023-11-23 21:19:51,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:51,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:19:51,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:51,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740504035] [2023-11-23 21:19:51,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740504035] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:51,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101813104] [2023-11-23 21:19:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:51,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:51,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:51,706 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:51,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:19:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:52,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 4285 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:19:52,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:19:53,086 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:19:53,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101813104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:53,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:19:53,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:19:53,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033032347] [2023-11-23 21:19:53,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:53,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:53,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:53,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:53,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:19:53,090 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) [2023-11-23 21:19:55,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:55,363 INFO L93 Difference]: Finished difference Result 1193 states and 1748 transitions. [2023-11-23 21:19:55,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:55,364 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 [2023-11-23 21:19:55,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:55,373 INFO L225 Difference]: With dead ends: 1193 [2023-11-23 21:19:55,374 INFO L226 Difference]: Without dead ends: 1190 [2023-11-23 21:19:55,375 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 [2023-11-23 21:19:55,376 INFO L413 NwaCegarLoop]: 928 mSDtfsCounter, 1023 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:55,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 928 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-23 21:19:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1190 states. [2023-11-23 21:19:55,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1190 to 1190. [2023-11-23 21:19:55,457 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) [2023-11-23 21:19:55,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1745 transitions. [2023-11-23 21:19:55,467 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1745 transitions. Word has length 49 [2023-11-23 21:19:55,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:55,468 INFO L495 AbstractCegarLoop]: Abstraction has 1190 states and 1745 transitions. [2023-11-23 21:19:55,468 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) [2023-11-23 21:19:55,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1745 transitions. [2023-11-23 21:19:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 21:19:55,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:55,472 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] [2023-11-23 21:19:55,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-23 21:19:55,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:55,688 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:19:55,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:55,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1520898148, now seen corresponding path program 1 times [2023-11-23 21:19:55,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:55,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469995473] [2023-11-23 21:19:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:55,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:19:56,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:56,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469995473] [2023-11-23 21:19:56,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469995473] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:19:56,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149877862] [2023-11-23 21:19:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:56,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:19:56,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:56,323 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:19:56,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:19:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:57,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 4287 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:19:57,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:19:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:19:57,669 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:19:57,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149877862] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:57,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:19:57,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:19:57,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307185516] [2023-11-23 21:19:57,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:57,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:57,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:57,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:57,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:19:57,672 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) [2023-11-23 21:20:00,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:20:00,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:00,166 INFO L93 Difference]: Finished difference Result 1192 states and 1746 transitions. [2023-11-23 21:20:00,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:20:00,167 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 [2023-11-23 21:20:00,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:00,179 INFO L225 Difference]: With dead ends: 1192 [2023-11-23 21:20:00,179 INFO L226 Difference]: Without dead ends: 1189 [2023-11-23 21:20:00,180 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 [2023-11-23 21:20:00,181 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 1020 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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, 2.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:00,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1020 Valid, 926 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-23 21:20:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2023-11-23 21:20:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1189. [2023-11-23 21:20:00,353 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) [2023-11-23 21:20:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1743 transitions. [2023-11-23 21:20:00,365 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1743 transitions. Word has length 50 [2023-11-23 21:20:00,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:00,368 INFO L495 AbstractCegarLoop]: Abstraction has 1189 states and 1743 transitions. [2023-11-23 21:20:00,368 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) [2023-11-23 21:20:00,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1743 transitions. [2023-11-23 21:20:00,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-23 21:20:00,374 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:00,374 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] [2023-11-23 21:20:00,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:00,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:00,600 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:20:00,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:00,601 INFO L85 PathProgramCache]: Analyzing trace with hash -97260626, now seen corresponding path program 1 times [2023-11-23 21:20:00,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:00,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007135183] [2023-11-23 21:20:00,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:00,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 21:20:01,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:01,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007135183] [2023-11-23 21:20:01,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007135183] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:01,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235166235] [2023-11-23 21:20:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:01,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:01,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:01,187 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:01,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb6dfd49-9ff0-414f-b748-396f92b02754/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:20:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:02,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 4289 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:20:02,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 21:20:02,399 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:20:02,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235166235] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:02,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 21:20:02,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-11-23 21:20:02,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686142757] [2023-11-23 21:20:02,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:02,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:20:02,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:02,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:20:02,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:02,402 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)