./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--input--misc--uinput.ko-ldv_main0.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_ba2031ca-fb1e-43fb-9022-1e1973a62e73/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/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_ba2031ca-fb1e-43fb-9022-1e1973a62e73/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--input--misc--uinput.ko-ldv_main0.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/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_ba2031ca-fb1e-43fb-9022-1e1973a62e73/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 1ef83f89a2480bb974b27f067785c3859d21a1e764735321272ad8be1e6dccbd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:29:02,146 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:29:02,261 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-64bit-Taipan_Default.epf [2023-11-23 21:29:02,266 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:29:02,267 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:29:02,292 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:29:02,293 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:29:02,294 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:29:02,295 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:29:02,295 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:29:02,296 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:29:02,296 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:29:02,297 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:29:02,298 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:29:02,298 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:29:02,299 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:29:02,299 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:29:02,300 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:29:02,301 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:29:02,301 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:29:02,302 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:29:02,303 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:29:02,304 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:29:02,304 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:29:02,305 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:29:02,305 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:29:02,306 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:29:02,306 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:29:02,307 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:29:02,307 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:29:02,308 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:29:02,308 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:29:02,309 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:29:02,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:29:02,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:29:02,310 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:29:02,311 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:29:02,312 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:29:02,312 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:29:02,313 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:29:02,313 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:29:02,320 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:29:02,320 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:29:02,320 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:29:02,321 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_ba2031ca-fb1e-43fb-9022-1e1973a62e73/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ef83f89a2480bb974b27f067785c3859d21a1e764735321272ad8be1e6dccbd [2023-11-23 21:29:02,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:29:02,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:29:02,680 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:29:02,682 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:29:02,684 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:29:02,686 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--input--misc--uinput.ko-ldv_main0.cil.out.i [2023-11-23 21:29:05,889 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:29:06,462 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:29:06,462 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--input--misc--uinput.ko-ldv_main0.cil.out.i [2023-11-23 21:29:06,502 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/bin/utaipan-verify-mE87zJ7Ire/data/15a5f838b/ad704e1e41b34537989902eba2c5404d/FLAG81323a99f [2023-11-23 21:29:06,518 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/bin/utaipan-verify-mE87zJ7Ire/data/15a5f838b/ad704e1e41b34537989902eba2c5404d [2023-11-23 21:29:06,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:29:06,522 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:29:06,524 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:29:06,524 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:29:06,530 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:29:06,531 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:29:06" (1/1) ... [2023-11-23 21:29:06,532 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c8f7364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:06, skipping insertion in model container [2023-11-23 21:29:06,532 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:29:06" (1/1) ... [2023-11-23 21:29:06,650 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:29:08,005 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_ba2031ca-fb1e-43fb-9022-1e1973a62e73/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--input--misc--uinput.ko-ldv_main0.cil.out.i[133672,133685] [2023-11-23 21:29:08,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:29:08,099 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:29:08,210 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile (".pushsection .smp_locks,\"a\"\n.balign 4\n.long 671f - .\n.popsection\n671:\n\tlock; bts %1,%0": "+m" (*((long volatile *)addr)): "Ir" (nr): "memory"); [3073] [2023-11-23 21:29:08,214 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ volatile ("bt %2,%1\n\tsbb %0,%0": "=r" (oldbit): "m" (*((unsigned long *)addr)), "Ir" (nr)); [3087-3088] [2023-11-23 21:29:08,216 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& current_task)); [3102] [2023-11-23 21:29:08,216 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3105] [2023-11-23 21:29:08,217 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3108] [2023-11-23 21:29:08,217 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& current_task)); [3111] [2023-11-23 21:29:08,220 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movb %%gs:%P1,%0": "=q" (pfo_ret__): "p" (& kernel_stack)); [3173] [2023-11-23 21:29:08,221 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movw %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& kernel_stack)); [3176] [2023-11-23 21:29:08,222 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movl %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& kernel_stack)); [3179] [2023-11-23 21:29:08,222 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ ("movq %%gs:%P1,%0": "=r" (pfo_ret__): "p" (& kernel_stack)); [3182] [2023-11-23 21:29:08,344 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_ba2031ca-fb1e-43fb-9022-1e1973a62e73/sv-benchmarks/c/ldv-consumption/linux-3.8-rc1-32_7a-drivers--input--misc--uinput.ko-ldv_main0.cil.out.i[133672,133685] [2023-11-23 21:29:08,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:29:08,423 WARN L675 CHandler]: The function __bad_percpu_size is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:29:08,431 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:29:08,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08 WrapperNode [2023-11-23 21:29:08,431 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:29:08,433 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:29:08,433 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:29:08,433 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:29:08,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,516 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,692 INFO L138 Inliner]: procedures = 191, calls = 833, calls flagged for inlining = 89, calls inlined = 75, statements flattened = 2248 [2023-11-23 21:29:08,694 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:29:08,697 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:29:08,697 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:29:08,697 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:29:08,707 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,723 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,724 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,810 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,828 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,855 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,880 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,913 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:29:08,915 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:29:08,915 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:29:08,915 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:29:08,916 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (1/1) ... [2023-11-23 21:29:08,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:29:08,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:08,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:29:08,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:29:08,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-23 21:29:09,000 INFO L130 BoogieDeclarations]: Found specification of procedure input_event_size [2023-11-23 21:29:09,000 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event_size [2023-11-23 21:29:09,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-23 21:29:09,000 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-23 21:29:09,000 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:29:09,001 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_mutex_of_uinput_device [2023-11-23 21:29:09,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_mutex_of_uinput_device [2023-11-23 21:29:09,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-11-23 21:29:09,002 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-11-23 21:29:09,002 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2023-11-23 21:29:09,003 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2023-11-23 21:29:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2023-11-23 21:29:09,003 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2023-11-23 21:29:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure uinput_request_done [2023-11-23 21:29:09,005 INFO L138 BoogieDeclarations]: Found implementation of procedure uinput_request_done [2023-11-23 21:29:09,005 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 21:29:09,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 21:29:09,007 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2023-11-23 21:29:09,007 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2023-11-23 21:29:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-11-23 21:29:09,008 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-11-23 21:29:09,008 INFO L130 BoogieDeclarations]: Found specification of procedure input_abs_get_flat [2023-11-23 21:29:09,008 INFO L138 BoogieDeclarations]: Found implementation of procedure input_abs_get_flat [2023-11-23 21:29:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:29:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2023-11-23 21:29:09,009 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2023-11-23 21:29:09,009 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2023-11-23 21:29:09,010 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2023-11-23 21:29:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-11-23 21:29:09,010 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-11-23 21:29:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure input_alloc_absinfo [2023-11-23 21:29:09,010 INFO L138 BoogieDeclarations]: Found implementation of procedure input_alloc_absinfo [2023-11-23 21:29:09,010 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2023-11-23 21:29:09,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2023-11-23 21:29:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2023-11-23 21:29:09,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2023-11-23 21:29:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure uinput_request_find [2023-11-23 21:29:09,011 INFO L138 BoogieDeclarations]: Found implementation of procedure uinput_request_find [2023-11-23 21:29:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_mutex_of_uinput_device [2023-11-23 21:29:09,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_mutex_of_uinput_device [2023-11-23 21:29:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:29:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure uinput_allocate_device [2023-11-23 21:29:09,012 INFO L138 BoogieDeclarations]: Found implementation of procedure uinput_allocate_device [2023-11-23 21:29:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2023-11-23 21:29:09,012 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2023-11-23 21:29:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:29:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure uinput_ioctl_handler [2023-11-23 21:29:09,013 INFO L138 BoogieDeclarations]: Found implementation of procedure uinput_ioctl_handler [2023-11-23 21:29:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 21:29:09,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:29:09,014 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2023-11-23 21:29:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure uinput_ff_upload_from_user [2023-11-23 21:29:09,015 INFO L138 BoogieDeclarations]: Found implementation of procedure uinput_ff_upload_from_user [2023-11-23 21:29:09,015 INFO L130 BoogieDeclarations]: Found specification of procedure uinput_destroy_device [2023-11-23 21:29:09,015 INFO L138 BoogieDeclarations]: Found implementation of procedure uinput_destroy_device [2023-11-23 21:29:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 21:29:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure input_abs_get_max [2023-11-23 21:29:09,016 INFO L138 BoogieDeclarations]: Found implementation of procedure input_abs_get_max [2023-11-23 21:29:09,016 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2023-11-23 21:29:09,017 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2023-11-23 21:29:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2023-11-23 21:29:09,017 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2023-11-23 21:29:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2023-11-23 21:29:09,017 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2023-11-23 21:29:09,017 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2023-11-23 21:29:09,017 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2023-11-23 21:29:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure input_abs_get_min [2023-11-23 21:29:09,018 INFO L138 BoogieDeclarations]: Found implementation of procedure input_abs_get_min [2023-11-23 21:29:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:29:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 21:29:09,018 INFO L130 BoogieDeclarations]: Found specification of procedure is_compat_task [2023-11-23 21:29:09,018 INFO L138 BoogieDeclarations]: Found implementation of procedure is_compat_task [2023-11-23 21:29:09,019 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2023-11-23 21:29:09,019 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2023-11-23 21:29:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2023-11-23 21:29:09,020 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2023-11-23 21:29:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure printk [2023-11-23 21:29:09,020 INFO L138 BoogieDeclarations]: Found implementation of procedure printk [2023-11-23 21:29:09,020 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2023-11-23 21:29:09,021 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2023-11-23 21:29:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2023-11-23 21:29:09,021 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2023-11-23 21:29:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2023-11-23 21:29:09,021 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2023-11-23 21:29:09,021 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2023-11-23 21:29:09,021 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2023-11-23 21:29:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2023-11-23 21:29:09,022 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2023-11-23 21:29:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:29:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2023-11-23 21:29:09,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2023-11-23 21:29:09,022 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2023-11-23 21:29:09,022 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2023-11-23 21:29:09,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-23 21:29:09,023 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2023-11-23 21:29:09,023 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2023-11-23 21:29:09,023 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2023-11-23 21:29:09,023 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2023-11-23 21:29:09,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:29:09,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:29:09,024 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2023-11-23 21:29:09,025 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2023-11-23 21:29:09,464 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:29:09,467 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:29:16,754 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:29:17,385 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:29:17,386 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:29:17,388 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:29:17 BoogieIcfgContainer [2023-11-23 21:29:17,388 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:29:17,390 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:29:17,391 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:29:17,394 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:29:17,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:29:06" (1/3) ... [2023-11-23 21:29:17,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fbba29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:29:17, skipping insertion in model container [2023-11-23 21:29:17,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:29:08" (2/3) ... [2023-11-23 21:29:17,396 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26fbba29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:29:17, skipping insertion in model container [2023-11-23 21:29:17,396 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:29:17" (3/3) ... [2023-11-23 21:29:17,398 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--input--misc--uinput.ko-ldv_main0.cil.out.i [2023-11-23 21:29:17,419 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:29:17,419 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:29:17,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:29:17,518 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;@6f25c2d2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:29:17,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:29:17,529 INFO L276 IsEmpty]: Start isEmpty. Operand has 527 states, 342 states have (on average 1.3859649122807018) internal successors, (474), 354 states have internal predecessors, (474), 140 states have call successors, (140), 43 states have call predecessors, (140), 43 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-23 21:29:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:29:17,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:17,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:17,538 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:17,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:17,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1811131594, now seen corresponding path program 1 times [2023-11-23 21:29:17,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:17,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23266864] [2023-11-23 21:29:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:17,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:18,013 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 21:29:18,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:18,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23266864] [2023-11-23 21:29:18,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23266864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:18,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:18,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:29:18,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547109741] [2023-11-23 21:29:18,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:18,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:29:18,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:18,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:29:18,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:29:18,095 INFO L87 Difference]: Start difference. First operand has 527 states, 342 states have (on average 1.3859649122807018) internal successors, (474), 354 states have internal predecessors, (474), 140 states have call successors, (140), 43 states have call predecessors, (140), 43 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 21:29:18,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:18,602 INFO L93 Difference]: Finished difference Result 1048 states and 1508 transitions. [2023-11-23 21:29:18,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:29:18,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 10 [2023-11-23 21:29:18,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:18,630 INFO L225 Difference]: With dead ends: 1048 [2023-11-23 21:29:18,631 INFO L226 Difference]: Without dead ends: 523 [2023-11-23 21:29:18,643 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 21:29:18,649 INFO L413 NwaCegarLoop]: 655 mSDtfsCounter, 741 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:18,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 655 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:29:18,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2023-11-23 21:29:18,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 523. [2023-11-23 21:29:18,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 341 states have (on average 1.3782991202346042) internal successors, (470), 350 states have internal predecessors, (470), 139 states have call successors, (139), 43 states have call predecessors, (139), 42 states have return successors, (135), 133 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-23 21:29:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 744 transitions. [2023-11-23 21:29:18,791 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 744 transitions. Word has length 10 [2023-11-23 21:29:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:18,793 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 744 transitions. [2023-11-23 21:29:18,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 21:29:18,795 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 744 transitions. [2023-11-23 21:29:18,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 21:29:18,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:18,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:18,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:29:18,797 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:18,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:18,798 INFO L85 PathProgramCache]: Analyzing trace with hash 310185205, now seen corresponding path program 1 times [2023-11-23 21:29:18,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:18,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502965488] [2023-11-23 21:29:18,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:18,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:18,930 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 21:29:18,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:18,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502965488] [2023-11-23 21:29:18,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502965488] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:18,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:18,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:29:18,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295027772] [2023-11-23 21:29:18,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:18,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:29:18,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:18,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:29:18,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:29:18,935 INFO L87 Difference]: Start difference. First operand 523 states and 744 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 21:29:19,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:19,393 INFO L93 Difference]: Finished difference Result 525 states and 745 transitions. [2023-11-23 21:29:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:29:19,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2023-11-23 21:29:19,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:19,400 INFO L225 Difference]: With dead ends: 525 [2023-11-23 21:29:19,401 INFO L226 Difference]: Without dead ends: 522 [2023-11-23 21:29:19,401 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 21:29:19,403 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 736 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:19,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 652 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:29:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2023-11-23 21:29:19,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 522. [2023-11-23 21:29:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 341 states have (on average 1.3753665689149561) internal successors, (469), 349 states have internal predecessors, (469), 138 states have call successors, (138), 43 states have call predecessors, (138), 42 states have return successors, (135), 133 states have call predecessors, (135), 135 states have call successors, (135) [2023-11-23 21:29:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 742 transitions. [2023-11-23 21:29:19,467 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 742 transitions. Word has length 11 [2023-11-23 21:29:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:19,467 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 742 transitions. [2023-11-23 21:29:19,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 21:29:19,468 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 742 transitions. [2023-11-23 21:29:19,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 21:29:19,469 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:19,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:19,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:29:19,469 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:19,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:19,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1025492269, now seen corresponding path program 1 times [2023-11-23 21:29:19,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:19,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908954646] [2023-11-23 21:29:19,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:19,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:19,583 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 21:29:19,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:19,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908954646] [2023-11-23 21:29:19,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908954646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:19,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:19,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:29:19,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659902407] [2023-11-23 21:29:19,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:19,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:29:19,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:29:19,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:29:19,589 INFO L87 Difference]: Start difference. First operand 522 states and 742 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 21:29:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:20,333 INFO L93 Difference]: Finished difference Result 663 states and 929 transitions. [2023-11-23 21:29:20,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:29:20,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 12 [2023-11-23 21:29:20,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:20,341 INFO L225 Difference]: With dead ends: 663 [2023-11-23 21:29:20,341 INFO L226 Difference]: Without dead ends: 653 [2023-11-23 21:29:20,342 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 21:29:20,344 INFO L413 NwaCegarLoop]: 660 mSDtfsCounter, 229 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:20,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 1259 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:29:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2023-11-23 21:29:20,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2023-11-23 21:29:20,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 420 states have (on average 1.3523809523809525) internal successors, (568), 431 states have internal predecessors, (568), 172 states have call successors, (172), 62 states have call predecessors, (172), 60 states have return successors, (173), 164 states have call predecessors, (173), 169 states have call successors, (173) [2023-11-23 21:29:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 913 transitions. [2023-11-23 21:29:20,408 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 913 transitions. Word has length 12 [2023-11-23 21:29:20,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:20,408 INFO L495 AbstractCegarLoop]: Abstraction has 653 states and 913 transitions. [2023-11-23 21:29:20,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 21:29:20,409 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 913 transitions. [2023-11-23 21:29:20,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 21:29:20,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:20,413 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:29:20,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:29:20,413 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:20,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:20,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1312783417, now seen corresponding path program 1 times [2023-11-23 21:29:20,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:20,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457636324] [2023-11-23 21:29:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:20,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:29:20,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:20,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457636324] [2023-11-23 21:29:20,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457636324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:20,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:20,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:29:20,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007858546] [2023-11-23 21:29:20,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:20,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:29:20,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:20,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:29:20,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:29:20,551 INFO L87 Difference]: Start difference. First operand 653 states and 913 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:29:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:21,327 INFO L93 Difference]: Finished difference Result 1355 states and 1912 transitions. [2023-11-23 21:29:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:29:21,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2023-11-23 21:29:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:21,336 INFO L225 Difference]: With dead ends: 1355 [2023-11-23 21:29:21,336 INFO L226 Difference]: Without dead ends: 706 [2023-11-23 21:29:21,339 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 21:29:21,350 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 34 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1274 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:21,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1274 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:29:21,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2023-11-23 21:29:21,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 699. [2023-11-23 21:29:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 456 states have (on average 1.3574561403508771) internal successors, (619), 467 states have internal predecessors, (619), 182 states have call successors, (182), 62 states have call predecessors, (182), 60 states have return successors, (187), 174 states have call predecessors, (187), 179 states have call successors, (187) [2023-11-23 21:29:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 988 transitions. [2023-11-23 21:29:21,422 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 988 transitions. Word has length 35 [2023-11-23 21:29:21,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:21,423 INFO L495 AbstractCegarLoop]: Abstraction has 699 states and 988 transitions. [2023-11-23 21:29:21,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 21:29:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 988 transitions. [2023-11-23 21:29:21,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 21:29:21,432 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:21,433 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:21,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:29:21,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:21,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:21,435 INFO L85 PathProgramCache]: Analyzing trace with hash 414757851, now seen corresponding path program 1 times [2023-11-23 21:29:21,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:21,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304209193] [2023-11-23 21:29:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:21,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:29:21,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:21,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304209193] [2023-11-23 21:29:21,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304209193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:21,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:21,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:29:21,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516369201] [2023-11-23 21:29:21,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:21,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:29:21,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:21,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:29:21,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:29:21,838 INFO L87 Difference]: Start difference. First operand 699 states and 988 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:29:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:23,462 INFO L93 Difference]: Finished difference Result 760 states and 1049 transitions. [2023-11-23 21:29:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:29:23,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2023-11-23 21:29:23,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:23,471 INFO L225 Difference]: With dead ends: 760 [2023-11-23 21:29:23,471 INFO L226 Difference]: Without dead ends: 757 [2023-11-23 21:29:23,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:29:23,477 INFO L413 NwaCegarLoop]: 651 mSDtfsCounter, 612 mSDsluCounter, 1017 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1668 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:23,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1668 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-23 21:29:23,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2023-11-23 21:29:23,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 757. [2023-11-23 21:29:23,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 489 states have (on average 1.343558282208589) internal successors, (657), 500 states have internal predecessors, (657), 192 states have call successors, (192), 78 states have call predecessors, (192), 75 states have return successors, (197), 184 states have call predecessors, (197), 189 states have call successors, (197) [2023-11-23 21:29:23,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1046 transitions. [2023-11-23 21:29:23,601 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1046 transitions. Word has length 45 [2023-11-23 21:29:23,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:23,601 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 1046 transitions. [2023-11-23 21:29:23,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-23 21:29:23,602 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1046 transitions. [2023-11-23 21:29:23,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:29:23,605 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:23,605 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:23,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:29:23,606 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:23,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:23,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1296921941, now seen corresponding path program 1 times [2023-11-23 21:29:23,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:23,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494236624] [2023-11-23 21:29:23,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:23,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:29:24,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:24,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494236624] [2023-11-23 21:29:24,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494236624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:24,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:24,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:29:24,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326422663] [2023-11-23 21:29:24,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:24,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:29:24,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:24,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:29:24,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:29:24,169 INFO L87 Difference]: Start difference. First operand 757 states and 1046 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:29:28,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:28,021 INFO L93 Difference]: Finished difference Result 917 states and 1269 transitions. [2023-11-23 21:29:28,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:29:28,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2023-11-23 21:29:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:28,034 INFO L225 Difference]: With dead ends: 917 [2023-11-23 21:29:28,035 INFO L226 Difference]: Without dead ends: 907 [2023-11-23 21:29:28,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:29:28,036 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 691 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1104 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 1104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:28,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 1577 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 1104 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-23 21:29:28,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2023-11-23 21:29:28,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 882. [2023-11-23 21:29:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 571 states have (on average 1.3432574430823117) internal successors, (767), 583 states have internal predecessors, (767), 221 states have call successors, (221), 92 states have call predecessors, (221), 89 states have return successors, (226), 213 states have call predecessors, (226), 218 states have call successors, (226) [2023-11-23 21:29:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1214 transitions. [2023-11-23 21:29:28,108 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1214 transitions. Word has length 47 [2023-11-23 21:29:28,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:28,110 INFO L495 AbstractCegarLoop]: Abstraction has 882 states and 1214 transitions. [2023-11-23 21:29:28,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:29:28,111 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1214 transitions. [2023-11-23 21:29:28,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 21:29:28,115 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:28,115 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:28,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:29:28,116 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:28,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:28,118 INFO L85 PathProgramCache]: Analyzing trace with hash 115957247, now seen corresponding path program 1 times [2023-11-23 21:29:28,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:28,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918910369] [2023-11-23 21:29:28,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:28,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:29:28,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:28,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918910369] [2023-11-23 21:29:28,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918910369] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:28,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:28,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:29:28,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636208539] [2023-11-23 21:29:28,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:28,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:29:28,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:28,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:29:28,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:29:28,284 INFO L87 Difference]: Start difference. First operand 882 states and 1214 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-23 21:29:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:29,466 INFO L93 Difference]: Finished difference Result 1776 states and 2444 transitions. [2023-11-23 21:29:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:29:29,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 57 [2023-11-23 21:29:29,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:29,475 INFO L225 Difference]: With dead ends: 1776 [2023-11-23 21:29:29,476 INFO L226 Difference]: Without dead ends: 892 [2023-11-23 21:29:29,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:29:29,484 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 13 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1959 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:29,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1959 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 21:29:29,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2023-11-23 21:29:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 885. [2023-11-23 21:29:29,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 573 states have (on average 1.3385689354275743) internal successors, (767), 585 states have internal predecessors, (767), 222 states have call successors, (222), 92 states have call predecessors, (222), 89 states have return successors, (227), 214 states have call predecessors, (227), 219 states have call successors, (227) [2023-11-23 21:29:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1216 transitions. [2023-11-23 21:29:29,557 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1216 transitions. Word has length 57 [2023-11-23 21:29:29,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:29,560 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1216 transitions. [2023-11-23 21:29:29,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-11-23 21:29:29,560 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1216 transitions. [2023-11-23 21:29:29,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 21:29:29,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:29,566 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:29,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:29:29,566 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:29,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:29,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1833141104, now seen corresponding path program 1 times [2023-11-23 21:29:29,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:29,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296196631] [2023-11-23 21:29:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:29,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:29,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 21:29:30,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:30,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296196631] [2023-11-23 21:29:30,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296196631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:30,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:30,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:29:30,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406460756] [2023-11-23 21:29:30,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:30,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:29:30,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:29:30,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:29:30,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:29:30,042 INFO L87 Difference]: Start difference. First operand 885 states and 1216 transitions. Second operand has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-23 21:29:31,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:31,255 INFO L93 Difference]: Finished difference Result 909 states and 1242 transitions. [2023-11-23 21:29:31,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:29:31,256 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 64 [2023-11-23 21:29:31,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:31,263 INFO L225 Difference]: With dead ends: 909 [2023-11-23 21:29:31,263 INFO L226 Difference]: Without dead ends: 906 [2023-11-23 21:29:31,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:29:31,266 INFO L413 NwaCegarLoop]: 664 mSDtfsCounter, 112 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2533 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:31,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 2533 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 21:29:31,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2023-11-23 21:29:31,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 901. [2023-11-23 21:29:31,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 583 states have (on average 1.3361921097770155) internal successors, (779), 595 states have internal predecessors, (779), 225 states have call successors, (225), 95 states have call predecessors, (225), 92 states have return successors, (230), 217 states have call predecessors, (230), 222 states have call successors, (230) [2023-11-23 21:29:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1234 transitions. [2023-11-23 21:29:31,338 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1234 transitions. Word has length 64 [2023-11-23 21:29:31,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:31,340 INFO L495 AbstractCegarLoop]: Abstraction has 901 states and 1234 transitions. [2023-11-23 21:29:31,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2023-11-23 21:29:31,341 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1234 transitions. [2023-11-23 21:29:31,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-11-23 21:29:31,344 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:31,344 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:31,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:29:31,345 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:29:31,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1262439974, now seen corresponding path program 1 times [2023-11-23 21:29:31,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:29:31,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77264796] [2023-11-23 21:29:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:31,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:29:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:29:31,562 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:29:31,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77264796] [2023-11-23 21:29:31,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77264796] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:29:31,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386528885] [2023-11-23 21:29:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:31,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:31,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:31,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:31,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ba2031ca-fb1e-43fb-9022-1e1973a62e73/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:29:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:32,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:29:32,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:32,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:29:32,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:29:32,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386528885] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:32,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [552874525] [2023-11-23 21:29:32,436 INFO L159 IcfgInterpreter]: Started Sifa with 58 locations of interest [2023-11-23 21:29:32,437 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:29:32,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:29:32,447 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:29:32,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs